Communication

1246 relations: A band (NATO), A.C. Cossor, A23 battery, ABS-CBN Mobile, Absorption band, Academy of Model Aeronautics, Accelerator physics, Acoustic metamaterial, Acousto-optic modulator, Acousto-optical spectrometer, ACP 131, Acronyms and abbreviations in avionics, Active Denial System, Active shutter 3D system, Adaptive collaborative control, Advanced Design System, Aeroflot Flight 101/435, Agros2D, AgustaWestland AW101, Airband, AirHop Communications, Airplane mode, Akai videotape format, Akai VK, Al-Khawarizmi Institute of Computer Science (KICS), Alabama Regional Communications System, Alexanderson alternator, Alfred J. Gross, Aliasing, ALICE (accelerator), All American Five, All-in-Wonder, Altair Semiconductor, Alternating current, Amateur astronomy, Amateur radio, Amateur radio direction finding, Ambient backscatter, Ambiguity function, AMES Type 82, Amphenol, Amplifier, Amplifier figures of merit, Amplitude, AN/APR-9, AN/URC-117 Ground Wave Emergency Network, AN/URM-25D signal generator, Analog Devices, Analog front-end, Analog passthrough, ..., Analysis of Malaysia Airlines Flight 370 satellite communications, Anant Bajaj, Anaren, Andrew Corporation, Anechoic chamber, Ankle monitor, Antenna (radio), Antenna feed, Antenna measurement, Antiproton Accumulator, Apple II, Arc converter, ARC fusion reactor, Ariel 3, Armed Forces Staff (Germany), Arms Control and Disarmament Agency, Array Operations Center, Asia-Pacific Telecommunity, Askaryan radiation, Astrophysical jet, Astropulse, Asynchronous serial interface, Atari 5200, Atomic fountain, ATSC standards, ATSC tuner, Attack-time delay, Attempted purchase of T-Mobile USA by AT&T, Audience response, Audio and video interfaces and connectors, Audion, AuraOne Systems, Austar, Australian and New Zealand television frequencies, Australian Communications and Media Authority, Australian Synchrotron, Automated airport weather station, Automatic equipment identification, Automatic meter reading, Automatic picture transmission, Automatic transmission system, Avalanche diode, Avalanche transistor, AWR Corporation, AWX antenna, École nationale supérieure de physique, électronique et Matériaux, B band (NATO), Backward-wave oscillator, Balanced line, Balise, Band I, Band III, Band IV, Band V, Band VI, Bandplan, Bandstacked, Bandwidth allocation, Barcode reader, Base station, Base station identity code, Baseband, Batmobile, BC-342, BC-610, Beacon frame, BEAM robotics, Beam steering, Beam tetrode, Beamforming, Beat frequency oscillator, Benefield Anechoic Facility, Beryllium, Bias tee, Bill Lear, Bioelectrodynamics, Bioelectromagnetics, Biological effects of radiation on the epigenome, Biomaterial Surface Modifications, Bipolar junction transistor, Bird Technologies, Bismarck, North Dakota, Bluetooth, BMT Canarsie Line, BNC connector, Boeing E-767, Boxee, Boxee Box, Braid-breaker, Brainerd, Minnesota, Branch FM, Brassboard, Breadboard, Broadband, Broadcast auxiliary service, Broadcast Electronics, Broadcast engineering, Broadcast license, Bronchial thermoplasty, Brownsville, Texas, Bruce M. Bailey, Buck Rogers XXVC, Burning Man, C band (NATO), Cable converter box, Cable locator, Cable modem, Cable modem termination system, Cable radio, Cable router, Cable television, Cable television headend, Cadence Design Systems, California Lutheran University, Canadian Penning Trap Mass Spectrometer, Canberra Deep Space Communication Complex, Cancer, Canon EOS flash system, Cantilever, Capacitively coupled plasma, Capacitor, Capacitor types, Cardiac imaging, Cardioneuroablation, Carrier frequency offset, Carrier recovery, Category 5 cable, CATUAV, Causes of cancer, Cavity magnetron, CB usage in the United States, CDMA2000, CEBus, Cell site, Cellular frequencies, Cellulite, Central apparatus room, Ceravision, Certified Health Physicist, Channel (broadcasting), Channel 1 branded TV stations in the United States, Channel 10 branded TV stations in the United States, Channel 11 branded TV stations in the United States, Channel 12 branded TV stations in the United States, Channel 13 branded TV stations in the United States, Channel 14 branded TV stations in the United States, Channel 15 branded TV stations in the United States, Channel 16 branded TV stations in the United States, Channel 16 VHF, Channel 18 branded TV stations in the United States, Channel 19 branded TV stations in the United States, Channel 2 branded TV stations in the United States, Channel 21 branded TV stations in the United States, Channel 25 branded TV stations in the United States, Channel 3 branded TV stations in the United States, Channel 3/4 output, Channel 4 branded TV stations in the United States, Channel 5 branded TV stations in the United States, Channel 58 branded TV stations in the United States, Channel 6 branded TV stations in the United States, Channel 61 branded TV stations in the United States, Channel 7 branded TV stations in the United States, Channel 8 branded TV stations in the United States, Channel 9 branded TV stations in the United States, Characteristic impedance, Charge qubit, Chemlink, Chirp, Choke (electronics), Chop shop, Chromatron, CIPURSE, Circuit Merit, Circulator, Clansman, Clock network, CMOS, Co-fired ceramic, Coase theorem, Coaxial cable, Cobham plc, Cochlea, Cognio, Cognitive radio, Coherer, Collins 207B-1 Transmitter, Colony collapse disorder, Columbus Blue Jackets Radio Network, Comb generator, Combat-net radio, Commodore 16, Commodore 64, Commodore Plus/4, Common Interface, Common-mode signal, Communication channel, Communications law, Communications receiver, Communications-based train control, Compact Linear Collider, Comparison of CRT, LCD, and plasma, Comparison of mobile phone standards, Compatible sideband transmission, Composite monitor, Computational electromagnetics, Computer keyboard, Concordia Station, Conder plot, Continental Electronics, Continuous Tone-Coded Squelch System, Convective storm detection, Copper in renewable energy, Cordless telephone, Counterpoise (ground system), Coupon-eligible converter box, Credence Systems, Crossband operation, Cryolipolysis, Cryomodule, Cryoneurolysis, Cryptanalysis of the Lorenz cipher, Crystal detector, Crystal radio, CTX (explosive-detection device), CubETH, Cut-off (electronics), Cyclotron, Cygnus X-3, Cypress Semiconductor, D band (NATO), D band (waveguide), DAMP Project, Danielle George, Data transmission, David Rutledge (engineer), DC block, Deep Space Optical Communications, Detector (radio), Devra Davis, Dielectric barrier discharge, Dielectric heating, Difference in the depth of modulation, Diffuse field acoustic testing, Digital access carrier system, Digital channel election, Digital down converter, Digital Opportunity Investment Trust, Digital radio frequency memory, Digital subchannel, Digital television adapter, Digital terrestrial television, Diode, DIP switch, Direct TPMS, Directed-energy weapon, Direction of arrival, Distance-bounding protocol, Distortion, Distributed active transformer, Distributed element circuit, DO-160, Doherty amplifier, Donald Ewen Cameron, Driven element, DS-P1-Yu, Dummy load, DVB-C, DVB-T, DX cluster, E band (NATO), E band (waveguide), Earth's field NMR, Eduard Karplus, Edwards Air Force Base, Effective radiated power, EIA RF Connectors, Eimac, Eldorado Institute, Elecraft, Electric beacon, Electric current, Electric organ, Electric spark, Electric Tokamak, Electrical length, Electrical termination, Electricity, Electrodeless lamp, Electrodeless plasma thruster, Electrolytic detector, Electromagnetic coil, Electromagnetic interference, Electromagnetic shielding, Electron nuclear double resonance, Electronic engineering, Electronic oscillator, Electronic pest control, Electronic tagging, Electronic warfare, Electrophysiology study, Electrosurgery, Elevated photography, Elta Systems, EM Solutions, EMC problem (excessive field strength), Emley Moor transmitting station, EnOcean, Envelope tracking, Erciyes University Radio Observatory, Error concealment, Eurobalise, European Telecommunications Satellite Organization, Evaporative cooling (atomic physics), Executive Order 13010, ExoMars Trace Gas Orbiter, Extended interaction oscillator, Extremely high frequency, EZ-Link, F band (NATO), F band (waveguide), F crimp, Facial rejuvenation, Failure of electronic components, Fawwaz T. Ulaby, FCC Declaration of Conformity, Federal Communications Commission, Federal Network Agency, Feed horn, Feed line, Feedback, Feedthrough, Femtocell, Ferrite (magnet), Ferrite bead, Ferrite core, FFAG accelerator, Fiber laser, Fiberglass, Field strength, Field strength meter, Filter (signal processing), Filter capacitor, Fingerprint, Finnish Defence Intelligence Agency, Firearms unit, Five Star Jubilee, Flip angle, Florida Power & Light, FM broadcasting in Australia, Folded unipole antenna, Forbidden Siren 2, Forest Industries Telecommunications, Foster–Seeley discriminator, Foturan, FOUP, Fourier-transform ion cyclotron resonance, Frequency assignment, Frequency changer, Frequency comb, Frequency coordination, Frequency counter, Frequency modulation, Frequency offset, Frequency sharing, Frequency-Agile Solar Radiotelescope, Frequency-shift keying, Fresnel zone antenna, Fringe (season 1), Future Combat Systems Manned Ground Vehicles, G band (NATO), Gabriel M. Rebeiz, Gain (electronics), Gain compression, Galeb (computer), Gallium nitride, Game Park, GameCube, GameCube accessories, GameCube controller, George Harold Brown, Ghosting (television), Gigabit Wireless, Gildeskål, GL Mk. I radar, GL Mk. III radar, Global surveillance disclosures (2013–present), Glossary of electrical and electronics engineering, Glossary of video terms, GMA News TV, GNU Radio, Gold, Gold Apollo, Goldschmidt alternator, Graphene nanoribbon, Gravity Recovery and Climate Experiment, GRB 970228, GRB 970508, Gregory Charvat, Grid dip oscillator, Grimeton Radio Station, Ground (electricity), Ground loop (electricity), Ground plane, Ground segment, GSM, GSM Radio Frequency optimization, GU-50, Guangzhou Metro, H band (NATO), HALCA, Hallicrafters SX-28, Hawthorne–Feather Airpark, HCT Co., Ltd., HDBaseT, Headset (audio), Hecto-, Height above ground level, Helicon double-layer thruster, Herbert S. Gutowsky, Heterodyne, HFSS, High frequency, High Frequency Active Auroral Research Program, High-altitude nuclear explosion, High-intensity radiated field, High-pass filter, History of gamma-ray burst research, History of metamaterials, History of the Tesla coil, History of the transistor, Home automation, HomeLink Wireless Control System, HomeRF, HT (vacuum tube), Hulse–Taylor binary, Humavox, Hybrid fibre-coaxial, Hybrid mass spectrometer, I band (NATO), IAI Harpy NG, IDEN, IEEE 802.11, IEEE 802.15.4, IEEE 802.20, IEEE MTT-S International Microwave Symposium, Image response, IMEC, Impedance bridging, In situ, In-band on-channel, In-Building Cellular Enhancement System, IND Culver Line, Index of electrical engineering articles, Index of electronics articles, Index of physics articles (R), Index of radiation articles, Index of radio propagation articles, Induction welding, Inductive output tube, Inductively coupled plasma atomic emission spectroscopy, Inductively coupled plasma mass spectrometry, Inductor, Inflation (cosmology), Injection locking, Innocence + Experience Tour, Insteon, Insteon (company), Insulator (electricity), Insulin pump, Integrated circuit design, Intel Mobile Communications, Intensity modulation, Interactive Scenario Builder, Intercarrier method, Interferometry, Intermediate frequency, Intermediate power amplifier, Intermodulation, Internet 0, Interventional magnetic resonance imaging, Inverse synthetic-aperture radar, Inverted-F antenna, Invisibility, Ion funnel, Ion thruster, Ion trap, Ion-mobility spectrometry–mass spectrometry, Ionospheric absorption, IQ imbalance, IQRF, ISM applications, ISM band, ISmartAlarm, Isolator (microwave), ITER, ITU Radio Regulations, ITU-R, IWireless, IXYS Corporation, Π pad, J band (NATO), J-coupling, Janel Leppin, Jatayu Conservation Breeding Centre, Pinjore, Jean Jeener, Joe Wiseman Howland, John Kanzius, Judith C. Waller, Jump wire, Justin Jacobs, K band (NATO), KALX, Karakalpakstan, Keychain, KFWB, KIC 8462852, Kilpatrick limit, Kinetic inductance, KJZY, KKOL (AM), KLCH, KLVM (FM), Klystron, KNX (standard), Kolchuga passive sensor, Kon-Tiki expedition, Kotcherlakota Rangadhama Rao, KPFW-LD, KQLZ (defunct), KRLX, KSLG-FM, KSTAR, KZST, L band (NATO), L-Tronics, LADEE, Langmuir probe, Laplace transform, Laser, Laser pumping, Last mile, Lastikman, Lawrence Lessig, Lead (electronics), Lecher lines, Lego Mindstorms, Levitated dipole, Li-Fi, Lightning detection, Line Impedance Stabilization Network, Linear amplifier, Linear particle accelerator, Linear Technology, Lipolysis, List of amateur radio frequency bands in India, List of Amkette products, List of battery sizes, List of computing and IT abbreviations, List of cycles, List of energy abbreviations, List of former NTA Film Network affiliates in the United States, List of Hatzolah chapters, List of medical roots, suffixes and prefixes, List of prolific inventors, List of Puerto Rican scientists and inventors, List of television stations in Washington (state), List of U.S. Air Force acronyms and expressions, List of vacuum tubes, List of video connectors, Litz wire, Liz Phillips, Load management, Lockheed Martin F-35 Lightning II, Logitech Harmony, LoJack, LonTalk, LonWorks, LoRa, Loudspeaker, Louisville Metro Police Department, Love egg, Low frequency, Low IF receiver, Low-noise block downconverter, LowFER, LTspice, Lunar IceCube, M band (NATO), MACOM Technology Solutions, Magnetic core, Magnetic detector, Magnetic levitation, Magnetic resonance (quantum mechanics), Magnetic resonance imaging, Magnetic resonance microscopy, Magnetoencephalography, Magnetohydrodynamic drive, Magnetosphere of Jupiter, Magnum (satellite), Malaysia Airlines Flight 370, Maritime Mobile Service Identity, Mark IV Industries, Mars Telecommunications Orbiter, Maser, Mason's invariant, Mass spectrometry, Mast radiator, Mauritius Radio Telescope, MaxLinear, Measuring instrument, Measuring receiver, Mechanical filter, Media in Alexandria, Minnesota, Media in Atlanta, Media in Columbus, Georgia, Media in Omaha, Nebraska, Medical imaging, Medium frequency, Mega Kid MK-1000, Melpar, Mercury Systems, MESFET, Mesh, Metabolome, Metamaterial absorber, Metamaterial antenna, Metamaterial cloaking, Microchip Technology, Microcoil, Microelectromechanical system oscillator, Microheater, Microstrip antenna, Microwave and Optical Technology Letters, Microwave cavity, Microwave Power Module, Microwave radiometer, Millimeter wave scanner, MIM-104 Patriot, Minimaze procedure, Minimed Paradigm, Minot, North Dakota, Misawa Air Base, Mississauga Model flying club, Mobile phone, Mobile phone features, Mobile phone radiation and health, Mobile phones on aircraft, Modulating retro-reflector, Modulation, Monolithic microwave integrated circuit, Monopole antenna, Monte Ceneri transmitter, Morcom International, Morse code, MOSFET, Motor–generator, Motorboating (electronics), Motorola DCT3412, Motorola Minitor, MPEG-2, MRI contrast agent, MRI RF shielding, Mu-metal, Mueller Systems, Multi-band device, Multi-frequency network, Multi-mode wireless terminal, Multipactor effect, Multispectral optoacoustic tomography, Muon spin spectroscopy, Mythology of Lost, N band (NATO), Na effect, Nagy Habib, Nanoelectromechanical relay, Napkin PC, NASA facilities, National Communications Commission, National Compact Stellarator Experiment, National Traffic System, Near and far field, Near-field communication, Negative temperature, Networked flying platform, Neumann U47, Neural dust, NeuRFon, Neurostimulation, Neutral beam injection, New York City Subway, Next Generation Data Communications, NGC 3256, Nicolas Wöhrl, Nike-X, Nira Dynamics AB, NJFA, No. 1 Radio School RAF, NodeB, Nokia 3510, Nominal impedance, Nominal power (radio broadcasting), Non-contact wafer testing, Non-surgical liposuction, Nonlinear junction detector, North American television frequencies, Norwegian Institute of Technology, NSA ANT catalog, NSA Playset, Nuclear magnetic resonance, Nuclear magnetic resonance decoupling, Nuclear magnetic resonance quantum computer, Nuclear magnetic resonance spectroscopy of proteins, Nuremberg U-Bahn, NXP Semiconductors, Nyquist filter, Observations and explorations of Venus, Observatory, Obstructive sleep apnea, On-board data handling, On-off keying, OneWeb satellite constellation, OPALS, Open Base Station Architecture Initiative, Open spectrum, OpenTag, Operation RAFTER, Optical heterodyne detection, Optical pumping, Optical rectenna, Optical wireless communications, Optics, Opto-electronic oscillator, ORFS, Orthogonal frequency-division multiple access, Orthogonal frequency-division multiplexing, Oudin coil, Our Mr. Sun, Outline of radio, Outline of telecommunication, Outline of television broadcasting, Output power of an analog TV transmitter, Over-the-horizon radar, Overvoltage, PacketCable, Paintball marker, Parabolic antenna, Parallel communication, Park Electrochemical Corp, Particle accelerator, Particle beam, Passband, Patch panel, Paul I. Richards, Paul Neill, Paul Oudin, Payam Heydari, Peak envelope power, Peckham Technology Inc, Penetration (telecommunications), Pentode, Peregrine Semiconductor, Personal RF safety monitors, Pet fence, Phantom circuit, Phantom pain, Phase contrast magnetic resonance imaging, Phase noise, Phase shift module, Philadelphia Phillies Radio Network, Photoacoustic imaging, Photometer, Photon energy, Photonic metamaterial, Physics of magnetic resonance imaging, Picoo Z, PIN diode, Pittsburgh Penguins Radio Network, PK-3 Plus (ISS Experiment), Plasma antenna, Plasma cutting, Plasma globe, Plasma lamp, Plasma polymerization, Plasma speaker, Plasma stability, Plasma stealth, Plasma torch, Plasma-enhanced chemical vapor deposition, Plate detector (radio), PlayStation 2 accessories, PMC-Sierra, PMR446, Point-to-multipoint communication, Point-to-point construction, Pointer Telocation, Police IT, Polypropylene, Polytetrafluoroethylene, Pong Research, Poppy (satellite), Port (circuit theory), Port of Tianjin governance, traffic management and law enforcement, Power amplifier classes, Power dividers and directional couplers, Powerwave Technologies, Preclinical imaging, Premiership of Tony Blair, Preselector, Presidency of Warren G. Harding, Primary line constants, Prince Sultan Advanced Technology Research Institute, Pro Electron, Product certification, Product detector, Programmable magnet, Proxim Wireless, Proximity card, Proximity effect (electromagnetism), PSK31, Pulsed radiofrequency, Pulse~Link, Q meter, QSL card, Quadrature amplitude modulation, Quadrupole ion trap, Quadrupole mass analyzer, Quantum biology, Quantum bus, Quantum Zeno effect, Quarter-wave impedance transformer, R-390A, Radar detector, Radar signal characteristics, Radial (radio), Radiation-induced cancer, Radical polymerization, Radio, Radio 4 UK Theme, Radio Amateur Civil Emergency Service, Radio astronomy, Radio broadcasting, Radio Data System, Radio frequency microelectromechanical system, Radio frequency skin tightening, Radio over IP, Radio propagation, Radio receiver, Radio science subsystem, Radio spectrum pollution, Radio star, Radio telescope, Radio wave, Radio Wave, Radio Waves, Radio-frequency engineering, Radio-frequency identification, Radio-frequency induction, Radiofrequency ablation, Radiofrequency coil, Radiofrequency thermocoagulation, Radioglaciology, Radiology, Radiosonde, Rain fade, Rainbow Gathering, Ranger 6, Ranger 7, Rat-race coupler, RATAN-600, Rate (mathematics), Ray Zinn, RC oscillator, RCA Studio II, Reactive-ion etching, Real-time locating system, Received signal strength indication, Reciprocity (electromagnetism), Reconfigurable antenna, Red Pitaya (hardware), Reflector (antenna), Reflex receiver, Regency TR-1, Regenerative circuit, Relative permittivity, Relativistic electromagnetism, Remote keyless system, Remote pickup unit, Remote radio head, Repetitive Electrical Impulse Noise, Resonator, RF (disambiguation), RF and microwave filter, RF antenna ion source, RF connector, RF front end, RF modulator, RF Planning, RF power amplifier, RF probe, RF resonant cavity thruster, RF switch, RF switch matrix, RG-58, RG-59, Ricochet (Internet service), RigExpert, RiP!: A Remix Manifesto, Roaming, Robotic lawn mower, Rolf Widerøe, Rolling code, Roper Technologies, RSI Corporation, Rubidium standard, Rudolf Abel, Russian tube designations, S-GPS, SAES Getters, Satellite Business Systems, Satellite data unit, Satellite navigation, Scanning near-field ultrasound holography, Scattering parameters, Schaffer–Vega diversity system, SCR-197, SCR-203, SCR-277, SCR-536, Sectional chart, Sector antenna, Secure access module, Sega Genesis, SelTrac, Semiconductor, Senkaku Islands dispute, Sensor node, SensorDynamics, Set-top box, Shinnar–Le Roux algorithm, Shooting of Joseph Erin Hamley, Short-range device, Shortwave radio, Shortwave radio receiver, Shunt impedance, Sideband, Siegfried Linkwitz, Sigma Designs, Signal generator, Signal overspill, Signal reflection, Signal strength in telecommunications, Signal tracer, Signals intelligence, Silicon Motion, Silvaco, Silver, SIMDIS, Single operator two radios, Single-carrier FDMA, Single-sideband modulation, Single-wire transmission line, Skew (antenna), Skywave, Skyworks Solutions, Slotted line, Small Outline Integrated Circuit, Smith chart, SnapStream, Society of Broadcast Engineers, Soitec, Solar flare, Solid-state nuclear magnetic resonance, Sonobuoy, Sound amplification by stimulated emission of radiation, Soundcast, Soviet integrated circuit designation, Space Communications and Navigation Program, Space mapping, Space Micro Inc, Spacecraft, Spark plug, Spark-gap transmitter, Special Astrophysical Observatory of the Russian Academy of Science, Specific absorption rate, Spectral density, Spectrum analyzer, Spectrum commons theory, Spectrum management, Specular reflection, Speed of light, Spharophon, Spice (bomb), Spin echo, Spin–lattice relaxation in the rotating frame, Spurious emission, Spurious-free dynamic range, Spurline, Spy video car, SQUID, Standing wave ratio, Stanley Autler, Star, StarCom21, STARGATE, Stealth aircraft, Stealth technology, Stemco, Stern–Gerlach experiment, Sticky & Sweet Tour, Street light, Stryker, Stub (electronics), Studio/transmitter link, Subaru Legacy (second generation), Substrate coupling, Super high frequency, Super Wi-Fi, Supercapacitor, Superconducting radio frequency, Superheterodyne transmitter, Susceptor, Swarm robotics, Switched-mode power supply, SWR meter, Synchrocyclotron, Syneron Medical, System camera, System on a chip, Sytek Inc, T pad, T-Mobile, T-Mobile US, T.E.D.D., Tactical Data Link, Tactical Vest Antenna System, Taggant, Talisman UUV, Tandem mass spectrometry, Tawkon, Tee connector, Teledyne e2v, Telegrapher's equations, Television, Television channel, Television in the United States, Television network, Television transmitter, Telit, Terahertz metamaterial, TerraNet AB, Tesla coil, Test loop translator, The European Radio Astronomy Club, The Future of Ideas, Theremin, Thermal relief, Thiele/Small parameters, Time from NPL (MSF), Timeline of global surveillance disclosures (2013–present), Timeline of kidney cancer, TINA (program), TO-92, Tonsillectomy, Trainphone, Transformational Satellite Communications System, Transformer, Transformer types, Transistor, Transmission line, Transmitter, Transmitter power output, Transmitter station, Transponder, Transposer, Transurethral needle ablation of the prostate, Transverter, Trapped ion quantum computer, Traveling-wave tube, Trench warfare, Triode, Triple quadrupole mass spectrometer, True RMS converter, Trunked radio system, Tunable metamaterial, Tuner (radio), TurboGrafx-16, TurkSat-3USat, TV tuner card, TV-band device, Twin Quasar, Twin-lead, Two-dimensional nuclear magnetic resonance spectroscopy, Types of radio emissions, U-70 (synchrotron), U-NII, U.S. Military connector specifications, Ultra high frequency, Ultrasonic grating, Ultrasound research interface, Umtech, UMTS frequency bands, Unbalanced line, Unintentional radiator, United States 2008 wireless spectrum auction, Universal remote, University of Cape Town, US Radar, V850, Vacuum tube, Valens (company), Valve amplifier, Valve RF amplifier, Valve transmitters, Van Eck phreaking, Variable capacitor, Variable-frequency oscillator, VDM-1, Verizon Fios, Very high frequency, Very low frequency, Very-small-aperture terminal, VHDL-AMS, Via fence, Viavi Solutions, Video modulation, Voice-activated radio-dispatched alarm, Voltage multiplier, Voltage-controlled oscillator, Voluntary Control Council for Interference by Information Technology Equipment, Vudu, WAAV, Inc., Wafer fabrication, WANN-CD, Warren G. Harding, WaveBird Wireless Controller, Waveguide rotary joint, WBZY, WCBS (AM), WDCI-LD, WFXS-DT, WGEN-TV, Wheel Impact phase detection, White spaces (radio), Whole Earth Blazar Telescope, Wide-bandgap semiconductor, Wilkinson power divider, William Perry, WiMAX MIMO, Wingless Electromagnetic Air Vehicle, Winlink, Wireless access point, Wireless electronic devices and health, Wireless keyboard, Wireless power transfer, Wireless Set No. 19, WiTrack, WJR, WOCH-CD, WOCK-CD, Woodward effect, WPHA-CD, WRDA (FM), WSAW-TV, WSRV, WTBY-TV, WURH-CD, WYGA-CD, WZAW-LD, WZBT, X band, X10 (industry standard), XE8000, XG Technology, XIM, Inc., Yaesu FT-817, Yagi–Uda antenna, Yoram Harth, Zehlendorf bei Oranienburg, Zero reference pulse, Zune 30, ZX80, 10,000, 10BROAD36, 152 (number), 172 (number), 1942 in aviation, 2-meter band, 2010–11 Ivorian crisis, 2015 TB145, 2182 kHz, 300-page iPhone bill, 3C 279, 576i, 6AK5, 807 (vacuum tube), 845 (vacuum tube). Expand index (1196 more) » « Shrink index

A band (NATO)

The NATO A band is the obsolete designation given to the radio frequencies from 0 to 250 MHz (equivalent to wavelengths from 1.2 m upwards) during the cold war period.

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A.C. Cossor

A.C. Cossor Ltd. was a British electronics company founded in 1859.

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A23 battery

The A23 battery (also known as 23A, 23AE, GP23A, V23GA, 8LR932, LRV08, 8LR23, MN21, L1028 or ANSI-1181A) is a dry cell-type battery mainly used in small electronic keychain radio devices, such as keyless vehicle entry systems, home security systems, garage door openers, and Bluetooth headsets.

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ABS-CBN Mobile

ABS-CBNmobile is a cellular telephony service provider in the Philippines owned and operated by ABS-CBN Convergence, a subsidiary of ABS-CBN.

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Absorption band

According to quantum mechanics, atoms and molecules can only hold certain defined quantities of energy, or exist in specific states.

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Academy of Model Aeronautics

The Academy of Model Aeronautics (AMA), based in Muncie, Indiana, USA at, is a non-profit organization dedicated to the promotion of model aviation as a recognized sport as well as a recreational activity.

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Accelerator physics

Accelerator physics is a branch of applied physics, concerned with designing, building and operating particle accelerators.

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Acoustic metamaterial

An acoustic metamaterial is a material designed to control, direct, and manipulate sound waves as these might occur in gases, liquids, and solids.

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Acousto-optic modulator

An acousto-optic modulator (AOM), also called a Bragg cell, uses the acousto-optic effect to diffract and shift the frequency of light using sound waves (usually at radio-frequency).

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Acousto-optical spectrometer

An acousto-optical spectrometer (AOS) is based on the diffraction of light by ultrasonic waves.

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ACP 131

ACP-131 is the controlling publication for the listing of Q codes and Z codes.

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Acronyms and abbreviations in avionics

This is a list of the acronyms and abbreviations used in avionics.

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Active Denial System

The Active Denial System (ADS) is a non-lethal, directed-energy weapon developed by the U.S. military, designed for area denial, perimeter security and crowd control.

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Active shutter 3D system

An active shutter 3D system (a.k.a. alternate frame sequencing, alternate image, AI, alternating field, field sequential or eclipse method) is a technique of displaying stereoscopic 3D images.

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Adaptive collaborative control

Adaptive collaborative control is the decision-making approach used in hybrid models consisting of finite-state machines with functional models as subcomponents to simulate behavior of systems formed through the partnerships of multiple agents for the execution of tasks and the development of work products.

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Advanced Design System

Advanced Design System (ADS) is an electronic design automation software system produced by Keysight EEsof EDA, a division of Keysight Technologies.

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Aeroflot Flight 101/435

Yakutsk United Air Group Flight 101/435 was a Soviet domestic passenger flight that was hijacked on 19 December 1985 by the co-pilot en route from Takhtamygda to Chita.

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Agros2D

Agros2D is an open-source code for numerical solutions of 2D coupled problems in technical disciplines.

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AgustaWestland AW101

The AgustaWestland AW101 is a medium-lift helicopter used in both military and civil applications.

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Airband

Airband or aircraft band is the name for a group of frequencies in the VHF radio spectrum allocated to radio communication in civil aviation, sometimes also referred to as VHF, or phonetically as "Victor".

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AirHop Communications

AirHop Communications is a privately funded American corporation based in San Diego, CA.

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Airplane mode

Airplane mode, aeroplane mode, flight mode, offline mode, or standalone mode is a setting available on many smartphones, portable computers, and other electronic devices that, when activated, suspends radio-frequency signal transmission by the device, thereby disabling Bluetooth, telephony, and Wi-Fi.

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Akai videotape format

The 1/4 inch Akai is a portable helical scan EIA and CCIR analog recording video tape recorder (VTR) with two video record heads on the scanning drum.

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Akai VK

VK is a helical scan analog recording videocassette format developed by Akai in the late 1970s, that is capable of recording and playing back black & white (and later color) video in either EIA (a.k.a. RS-170, the 525-line NTSC video standard for North America, Canada, Mexico, & Japan) and CCIR (the 625-line PAL video standard for Europe and other parts of the world).

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Al-Khawarizmi Institute of Computer Science (KICS)

Al-Khawarizmi Institute of Computer Science (Urdu: الخوارزمی ادارہ براے کمپیوٹر سائنس) was established in August 2002 at University of Engineering and Technology, Lahore to promote research and development in various fields of Computer Science and Information Technology.

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Alabama Regional Communications System

The Alabama Regional Communications System (ARCS) is a radio/alert notification communications district with responsibility for providing user-based administration for operations and maintenance of the interoperable communications system that serves Calhoun County, Alabama and Talladega County, Alabama.

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Alexanderson alternator

An Alexanderson alternator is a rotating machine invented by Ernst Alexanderson in 1904 for the generation of high-frequency alternating current for use as a radio transmitter.

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Alfred J. Gross

Alfred J. Gross (February 22, 1918 – December 21, 2000), a.k.a. Irving J. Gross was a pioneer in mobile wireless communication.

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Aliasing

In signal processing and related disciplines, aliasing is an effect that causes different signals to become indistinguishable (or aliases of one another) when sampled.

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ALICE (accelerator)

Accelerators and Lasers In Combined Experiments (ALICE), or Energy Recovery Linac Prototype (ERLP) is a 35MeV energy recovery linac test facility at Daresbury Laboratory in Cheshire, England.

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All American Five

The term All American Five (abbreviated AA5) is a colloquial name for mass-produced, superheterodyne radio receivers that used five vacuum tubes in their design.

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All-in-Wonder

The All-in-Wonder (also abbreviated to AIW) was a combination graphics card/TV tuner card designed by ATI Technologies.

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Altair Semiconductor

Altair Semiconductor is a developer of high performance single-mode Long Term Evolution (LTE) chipsets.

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Alternating current

Alternating current (AC) is an electric current which periodically reverses direction, in contrast to direct current (DC) which flows only in one direction.

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Amateur astronomy

Amateur astronomy is a hobby whose participants enjoy observing or imaging celestial objects in the sky using the unaided eye, binoculars, or telescopes.

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Amateur radio

Amateur radio, also known as ham radio, describes the use of radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communication.

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Amateur radio direction finding

Amateur radio direction finding (ARDF, also known as radio orienteering and radiosport) is an amateur racing sport that combines radio direction finding with the map and compass skills of orienteering.

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Ambient backscatter

Ambient backscatter uses existing radio frequency signals, such as radio, television and mobile telephony, to transmit data without a battery or power grid connection.

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Ambiguity function

In pulsed radar and sonar signal processing, an ambiguity function is a two-dimensional function of time delay and Doppler frequency \chi(\tau,f) showing the distortion of a returned pulse due to the receiver matched filter (commonly, but not exclusively, used in pulse compression radar) due to the Doppler shift of the return from a moving target.

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AMES Type 82

The AMES Type 82, also widely known by its rainbow codename Orange Yeoman, was an S-band 3D radar built by Marconi and used by the Royal Air Force (RAF), initially for tactical control and later for air traffic control (ATC).

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Amphenol

Amphenol Corporation is a major producer of electronic and fiber optic connectors, cable and interconnect systems such as coaxial cables.

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Amplifier

An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the power of a signal (a time-varying voltage or current).

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Amplifier figures of merit

In electronics, the figures of merit of an amplifier are numerical measures that characterize its properties and performance.

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Amplitude

The amplitude of a periodic variable is a measure of its change over a single period (such as time or spatial period).

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AN/APR-9

The AIL\Collins AN/APR-9 was a radiofrequency receiver produced in the United States.

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AN/URC-117 Ground Wave Emergency Network

The Ground Wave Emergency Network (GWEN) was a command and control communications system intended for use by the United States government to facilitate military communications before, during and after a nuclear war.

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AN/URM-25D signal generator

The AN/URM-25 signal generator was an electronic vacuum-tube radio-frequency (RF) signal generator used during the 1950s and 1960s by the U.S. Military to test electronic equipment.

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Analog Devices

Analog Devices, Inc., also known as ADI or Analog, is an American multinational semiconductor company specializing in data conversion and signal processing technology, headquartered in Norwood, Massachusetts.

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Analog front-end

An analog front-end (AFE or analog front-end controller AFEC) is a set of analog signal conditioning circuitry that uses sensitive analog amplifiers, often operational amplifiers, filters, and sometimes application-specific integrated circuits for sensors, radio receivers, and other circuits to provide a configurable and flexible electronics functional block, needed to interface a variety of sensors to an, antenna, analog to digital converter or in some cases to a microcontroller.

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Analog passthrough

Analog passthrough is a feature found on some digital-to-analog television converter boxes.

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Analysis of Malaysia Airlines Flight 370 satellite communications

The analysis of communications between Malaysia Airlines Flight 370 and Inmarsat's satellite telecommunication network provide the only source of information about Flight 370's location and possible in-flight events after it disappeared from radar coverage at 2:22 Malaysia Standard Time (MYT) on 8 March 2014 (17:22 UTC, 7 March), one hour after communication with air traffic control ended and the aircraft departed from its planned flight path while over the South China Sea.

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Anant Bajaj

Anant Bajaj (born 18 May 1977) is an Indian business magnate.

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Anaren

Anaren, Inc. provides high-frequency microwave microelectronics, components, and assemblies for wireless, aerospace, and defense electronics applications.

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Andrew Corporation

Andrew Corporation, a formerly independent manufacturer of hardware for communications networks, was founded by Victor J. Andrew and established in Orland Park, IL (1947) and acquired by CommScope in 2007.

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Anechoic chamber

An anechoic chamber (an-echoic meaning "non-reflective, non-echoing, echo-free") is a room designed to completely absorb reflections of either sound or electromagnetic waves.

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Ankle monitor

An ankle monitor (also known as a tether, or ankle bracelet) is a homing device that defendants under house arrest or parole are required to wear.

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Antenna (radio)

In radio, an antenna is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver.

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Antenna feed

In telecommunications and electronics, an antenna feed refers to the components of an antenna which feed the radio waves to the rest of the antenna structure, or in receiving antennas collect the incoming radio waves, convert them to electric currents and transmit them to the receiver.

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Antenna measurement

Antenna measurement techniques refers to the testing of antennas to ensure that the antenna meets specifications or simply to characterize it.

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Antiproton Accumulator

The Antiproton Accumulator (AA) was an infrastructure connected to the Proton-Antiproton Collider (SpS) — a modification of the Super Proton Synchrotron (SPS) — at CERN.

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Apple II

The Apple II (stylized as Apple.

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Arc converter

The arc converter, sometimes called the arc transmitter, or Poulsen arc after Danish engineer Valdemar Poulsen who invented it in 1903, was a variety of spark transmitter used in early wireless telegraphy.

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ARC fusion reactor

The ARC fusion reactor (affordable, robust, compact) is a theoretical design for a compact fusion reactor developed by the Massachusetts Institute of Technology (MIT) Plasma Science and Fusion Center (PSFC).

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Ariel 3

Ariel 3 was the first artificial satellite designed and constructed in the United Kingdom.

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Armed Forces Staff (Germany)

The Armed Forces Staff, in the meaning of General staff, of the German Bundeswehr (Führungsstab der Streitkräfte - Fü S.; literal: Command staff of the armed forces) was the central department of the Federal Ministry of Defence (MOD) in direct subordination to the Inspector General of the Bundeswehr (en: Chief of Staff of the Federal Armed Forces) and one of the five staff headquarters in the military command of the German Bundeswehr.

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Arms Control and Disarmament Agency

The U.S. Arms Control and Disarmament Agency (ACDA) was established as an independent agency of the United States government by the Arms Control and Disarmament Act,.

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Array Operations Center

The Array Operations Center (AOC) in Socorro, New Mexico, is the control and monitor center for the Very Long Baseline Array.

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Asia-Pacific Telecommunity

The Asia Pacific Telecommunity (APT) was founded on the joint initiatives of the United Nations Economic and Social Commission for Asia and the Pacific (UNESCAP) and the International Telecommunication Union (ITU).

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Askaryan radiation

The Askaryan radiation also known as Askaryan effect is the phenomenon whereby a particle traveling faster than the phase velocity of light in a dense dielectric (such as salt, ice or the lunar regolith) produces a shower of secondary charged particles which contain a charge anisotropy and thus emits a cone of coherent radiation in the radio or microwave part of the electromagnetic spectrum.

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Astrophysical jet

An astrophysical jet is an astronomical phenomenon where outflows of ionised matter are emitted as an extended beam along the axis of rotation.

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Astropulse

Astropulse is a distributed computing project that uses volunteers around the globe to lend their unused computing power to search for primordial black holes, pulsars, and extraterrestrial intelligence (ETI).

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Asynchronous serial interface

Asynchronous Serial Interface, or ASI, is a physical (connector and electrical) definition for serial data over 75-ohm coaxial cable at rates at or less than 270 megabits per second.

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Atari 5200

The Atari 5200 SuperSystem, commonly known as the Atari 5200, is a home video game console that was introduced in 1982 by Atari Inc.

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Atomic fountain

An atomic fountain is a cloud of atoms that is tossed upwards in the Earth's gravitational field by lasers.

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ATSC standards

Advanced Television Systems Committee (ATSC) standards are a set of standards for digital television transmission over terrestrial, cable, and satellite networks.

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ATSC tuner

An ATSC (Advanced Television Systems Committee) tuner, often called an ATSC receiver or HDTV tuner is a type of television tuner that allows reception of digital television (DTV) television channels transmitted by television stations in North America, parts of Central America and South Korea that use ATSC standards.

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Attack-time delay

In telecommunications, attack-time delay is the time needed for a receiver or transmitter to respond to an incoming signal.

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Attempted purchase of T-Mobile USA by AT&T

On March 20, 2011, AT&T announced that it would purchase T-Mobile USA.

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Audience response

Audience response is a type of interaction associated with the use of audience response systems, to create interactivity between a presenter and its audience.

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Audio and video interfaces and connectors

Audio connectors and video connectors are electrical connectors (or optical connectors) - plugs and sockets - for carrying audio signal and video signal.

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Audion

The Audion was an electronic detecting or amplifying vacuum tube invented by American electrical engineer Lee de Forest in 1906.

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AuraOne Systems

AuraOne Systems, Inc.

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Austar

Austar was an Australian telecommunications company.

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Australian and New Zealand television frequencies

Television frequency allocation has evolved since the commencement of television in Australia in 1956, and later in New Zealand in 1960.

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Australian Communications and Media Authority

The Australian Communications and Media Authority (ACMA) is an Australian Government statutory authority within the Communications portfolio.

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Australian Synchrotron

1 Electron gun 2 Linear accelerator (linac) 3 Booster ring 4 Storage ring 5 Beamline 6 Endstation (or experimental workstation, i.e., laboratory) --> The Australian Synchrotron is a 3 GeV national synchrotron radiation facility located in Clayton, in the south-eastern suburbs of Melbourne, Victoria, which opened in 2007.

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Automated airport weather station

Automated airport weather stations are automated sensor suites which are designed to serve aviation and meteorological observing needs for safe and efficient aviation operations, weather forecasting and climatology.

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Automatic equipment identification

Automatic equipment identification (AEI) is an electronic recognition system in use with the North American railroad industry.

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Automatic meter reading

Automatic meter reading, or AMR, is the technology of automatically collecting consumption, diagnostic, and status data from water meter or energy metering devices (gas, electric) and transferring that data to a central database for billing, troubleshooting, and analyzing.

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Automatic picture transmission

The Automatic Picture Transmission (APT) system is an analog image transmission system developed for use on weather satellites.

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Automatic transmission system

An automatic transmission system (or occasionally automated transmission system, to avoid confusion with the automatic transmission of an automobile) is an automated system designed to keep a radio transmitter and antenna system running without direct human oversight or attention for long periods.

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Avalanche diode

In electronics, an avalanche diode is a diode (made from silicon or other semiconductor) that is designed to experience avalanche breakdown at a specified reverse bias voltage.

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Avalanche transistor

An avalanche transistor is a bipolar junction transistor designed for operation in the region of its collector-current/collector-to-emitter voltage characteristics beyond the collector-to-emitter breakdown voltage, called avalanche breakdown region.

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AWR Corporation

AWR Corporation is an electronic design automation (EDA) software company, formerly known as Applied Wave Research, and then acquired by National Instruments The company develops, markets, sells and supports engineering software, which provides a computer-based environment for the design of hardware for wireless and high speed digital products.

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AWX antenna

An AWX antenna is an antenna which means that it can be used for All Wave radio frequency and is shaped like X. It has two "V" shaped elements.

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École nationale supérieure de physique, électronique et Matériaux

The École Nationale Supérieure de Physique, Électronique et Matériaux (commonly known as Phelma) is a Grande École located in Grenoble, France.

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B band (NATO)

The NATO B band is the obsolete designation given to the radio frequencies from 250 to 500 MHz (equivalent to wavelengths between 1.20 and 0.60 m) during the cold war period.

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Backward-wave oscillator

A backward wave oscillator (BWO), also called carcinotron (a trade name for tubes manufactured by CSF, now Thales) or backward wave tube, is a vacuum tube that is used to generate microwaves up to the terahertz range.

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Balanced line

In telecommunications and professional audio, a balanced line or balanced signal pair is a transmission line consisting of two conductors of the same type, each of which have equal impedances along their lengths and equal impedances to ground and to other circuits.

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Balise

A balise is an electronic beacon or transponder placed between the rails of a railway as part of an automatic train protection (ATP) system.

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Band I

Band I is a range of radio frequencies within the very high frequency (VHF) part of the electromagnetic spectrum.

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Band III

Band III is the name of the range of radio frequencies within the very high frequency (VHF) part of the electromagnetic spectrum from 174 to 240 megahertz (MHz).

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Band IV

Band IV is the name of a radio frequency range within the ultra high frequency part of the electromagnetic spectrum.

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Band V

Band V (meaning Band 5) is the name of a radio frequency range within the ultra high frequency part of the electromagnetic spectrum.

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Band VI

Band VI is a radio frequency range within the super high frequency (SHF) part of the electromagnetic spectrum.

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Bandplan

A bandplan or band plan is a plan for using a particular band of radio frequencies, that are a portion of the electromagnetic spectrum.

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Bandstacked

The term Bandstacked applies to an antenna or satellite feedhorn (LNBF) that is designed to operate on two or more bands of frequencies.

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Bandwidth allocation

Bandwidth allocation is the process of assigning radio frequencies to different applications.

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Barcode reader

A bar code reader (or bar code scanner) is an electronic device that can read and output printed barcodes to a computer.

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Base station

Base station (or base radio station) is – according to the International Telecommunication Union's (ITU) Radio Regulations (RR) – a "land station in the land mobile service." The term is used in the context of mobile telephony, wireless computer networking and other wireless communications and in land surveying.

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Base station identity code

The Base Station Identity Code (BSIC), is a code used in GSM to uniquely identify a base station.

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Baseband

Baseband is a signal that has a very narrow and near-zero frequency range, i.e. a spectral magnitude that is nonzero only for frequencies in the vicinity of the origin (termed f.

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Batmobile

The Batmobile is the fictional car driven by the superhero Batman in American comic books published by DC Comics.

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BC-342

The BC-342 was a World War II U.S. Army Signal Corps high frequency radio receiver.

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BC-610

The BC-610 was a radio transmitter based on the Hallicrafters HT-4 and was used by the U.S. Army Signal Corps during World War II.

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Beacon frame

Beacon frame is one of the management frames in IEEE 802.11 based WLANs.

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BEAM robotics

BEAM robotics (from '''B'''iology, '''E'''lectronics, '''A'''esthetics and '''M'''echanics) is a style of robotics that primarily uses simple analogue circuits, such as comparators, instead of a microprocessor in order to produce an unusually simple design.

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Beam steering

Beam steering (also spelled beamsteering or beam-steering) is about changing the direction of the main lobe of a radiation pattern.

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Beam tetrode

A beam tetrode, sometimes called a "beam power tube", is a type of tetrode vacuum tube (or 'valve') with auxiliary beam-focusing plates designed to augment power-handling capability and help reduce unwanted emission effects.

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Beamforming

Beamforming or spatial filtering is a signal processing technique used in sensor arrays for directional signal transmission or reception.

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Beat frequency oscillator

In a radio receiver, a beat frequency oscillator or BFO is a dedicated oscillator used to create an audio frequency signal from Morse code radiotelegraphy (CW) transmissions to make them audible.

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Benefield Anechoic Facility

Benefield Anechoic Facility (BAF) is an anechoic chamber located at the southwest side of the Edwards Air Force Base main base.

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Beryllium

Beryllium is a chemical element with symbol Be and atomic number 4.

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Bias tee

A bias tee is a three-port network used for setting the DC bias point of some electronic components without disturbing other components.

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Bill Lear

William Powell Lear (June 26, 1902 – May 14, 1978) was an American inventor and businessman.

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Bioelectrodynamics

Bioelectrodynamics is a branch of medical physics and bioelectromagnetism which deals with rapidly changing electric and magnetic fields in biological systems, i.e. high frequency endogenous electromagnetic phenomena in living cells.

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Bioelectromagnetics

Bioelectromagnetics, also known as bioelectromagnetism, is the study of the interaction between electromagnetic fields and biological entities.

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Biological effects of radiation on the epigenome

Ionizing radiation can cause biological effects which are passed on to offspring through the epigenome.

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Biomaterial Surface Modifications

Biomaterials exhibit various degrees of compatibility with the harsh environment within a living organism.

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Bipolar junction transistor

|- align.

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Bird Technologies

Bird Technologies manufactures radio frequency measurement and management equipment and systems and provides educational solutions and other services.

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Bismarck, North Dakota

Bismarck is the capital of the U.S. state of North Dakota and the county seat of Burleigh County.

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Bluetooth

Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485GHz) from fixed and mobile devices, and building personal area networks (PANs).

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BMT Canarsie Line

The Canarsie Line (sometimes referred to as the 14th Street–Eastern Line) is a rapid transit line of the Brooklyn–Manhattan Transit Corporation (BMT) Division of the New York City Subway system, named after its terminus in the Canarsie neighborhood of Brooklyn.

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BNC connector

The BNC (Bayonet Neill–Concelman) connector is a miniature quick connect/disconnect radio frequency connector used for coaxial cable.

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Boeing E-767

The Boeing E-767 is an Airborne Warning and Control System (AWACS) aircraft.

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Boxee

Boxee was a cross-platform freeware HTPC (Home Theater PC) software application with a 10-foot user interface and social networking features designed for the living-room TV that enables its users to view, rate and recommend content to their friends through many social network services and interactive media related features.

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Boxee Box

Boxee Box by D-Link (officially "D-Link Boxee Box DSM-380") is a Linux-based set-top device and media extender that first began shipping in 33 countries worldwide on 10 November 2010.

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Braid-breaker

A braid-breaker is a filter that prevents television interference (TVI).

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Brainerd, Minnesota

Brainerd is a city in Crow Wing County, Minnesota, United States.

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Branch FM

Branch FM is a community radio station based in Dewsbury, West Yorkshire, England, which has operated since May 2007.

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Brassboard

A brassboard or brass board is an experimental or demonstration test model, intended for field testing outside the laboratory environment.

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Breadboard

A breadboard is a construction base for prototyping of electronics.

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Broadband

In telecommunications, broadband is wide bandwidth data transmission which transports multiple signals and traffic types.

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Broadcast auxiliary service

A broadcast auxiliary service or BAS is any radio frequency system used by a radio station or TV station, which is not part of its direct broadcast to listeners or viewers.

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Broadcast Electronics

Broadcast Electronics (BE) is a manufacturer of AM and FM transmitters, Marti Electronics STL and RPU equipment, developer of the AudioVAULT radio automation system and parent company to Commotion - a social media company for radio.

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Broadcast engineering

Broadcast engineering is the field of electrical engineering, and now to some extent computer engineering and information technology, which deals with radio and television broadcasting.

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Broadcast license

A broadcast license is a type of spectrum license granting the licensee permission to use a portion of the radio frequency spectrum in a given geographical area for broadcasting purposes.

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Bronchial thermoplasty

Bronchial thermoplasty is a treatment for severe asthma approved by the FDA in 2010 involving the delivery of controlled, therapeutic radiofrequency energy to the airway wall, thus heating the tissue and reducing the amount of smooth muscle present in the airway wall.

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Brownsville, Texas

Brownsville is the county seat of Cameron County, Texas, United States.

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Bruce M. Bailey

Bruce M. Bailey, (born August 10, 1935), is an American author and humorist who also used the pen name of R. Adam Solo.

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Buck Rogers XXVC

Buck Rogers XXVC (sometimes written as Buck Rogers in the 25th Century) is a game setting created by TSR, Inc. in the late 1980s.

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Burning Man

Burning Man is an annual event in the western United States at Black Rock City – a temporary city erected in the Black Rock Desert of northwest Nevada, approximately north-northeast of Reno.

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C band (NATO)

The NATO C-band is the obsolete designation given to the radio frequencies from 500 to 1000 MHz (equivalent to wavelengths between 0.6 and 0.3 m) during the cold war period.

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Cable converter box

A cable converter box or television converter box is an electronic tuning device that transposes/converts any of the available channels from a cable television service to an analog RF signal on a single channel, usually VHF or 4, or to a different output for digital televisions such as HDMI.

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Cable locator

A cable locator or cable avoidance tool (CAT) is an instrument used for detecting the presence and approximate location of buried services in advance of undertaking excavation works.

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Cable modem

A cable modem is a type of network bridge that provides bi-directional data communication via radio frequency channels on a hybrid fibre-coaxial (HFC) and radio frequency over glass (RFoG) infrastructure.

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Cable modem termination system

A cable modem termination system or CMTS is a piece of equipment, typically located in a cable company's headend or hubsite, which is used to provide high speed data services, such as cable Internet or Voice over Internet Protocol, to cable subscribers.

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Cable radio

Cable radio or cable FM is a concept similar to that of cable television, bringing radio signals into homes and businesses via coaxial cable.

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Cable router

Cable router has 2 basic meanings.

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Cable television

Cable television is a system of delivering television programming to paying subscribers via radio frequency (RF) signals transmitted through coaxial cables, or in more recent systems, light pulses through fiber-optic cables.

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Cable television headend

A cable television headend is a master facility for receiving television signals for processing and distribution over a cable television system.

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Cadence Design Systems

Cadence Design Systems, Inc. is an American multinational electronic design automation (EDA) software and engineering services company, founded in 1988 by the merger of SDA Systems and ECAD, Inc. The company produces software, hardware and silicon structures for designing integrated circuits, systems on chips (SoCs) and printed circuit boards.

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California Lutheran University

California Lutheran University (also CLU or Cal Lutheran) is a private, liberal arts university located in Thousand Oaks, California.

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Canadian Penning Trap Mass Spectrometer

The Canadian Penning Trap Mass Spectrometer (CPT) is one of the major pieces of experimental equipment that is installed on the ATLAS superconducting heavy-ion linac facility at the Physics Division of the Argonne National Laboratory.

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Canberra Deep Space Communication Complex

The Canberra Deep Space Communication Complex (CDSCC) is an Earth station in Australia located at Tidbinbilla in the Australian Capital Territory.

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Cancer

Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body.

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Canon EOS flash system

Canon Inc.'s EOS flash system refers to the photographic flash mechanism used on Canon's film (35mm and APS) or digital EOS single-lens reflex cameras.

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Cantilever

A cantilever is a rigid structural element, such as a beam or a plate, anchored at one end to a (usually vertical) support from which it protrudes; this connection could also be perpendicular to a flat, vertical surface such as a wall.

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Capacitively coupled plasma

A capacitively coupled plasma (CCP) is one of the most common types of industrial plasma sources.

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Capacitor

A capacitor is a passive two-terminal electrical component that stores potential energy in an electric field.

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Capacitor types

Capacitors are manufactured in many forms, styles, lengths, girths, and from many materials.

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Cardiac imaging

Cardiac imaging techniques include coronary catheterization, echocardiogram, Intravascular ultrasound, Cardiac PET scan, Cardiac CT scan and Cardiac MRI.

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Cardioneuroablation

A frequent type of sycnope, termed vasovagal syncope is originated by intense cardioinhibition, mediated by a sudden vagal reflex, that causes transitory cardiac arrest by asystole and/or transient total atrioventricular block.

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Carrier frequency offset

Carrier frequency offset (CFO) is one of many non-idealities in baseband receiver design.

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Carrier recovery

A carrier recovery system is a circuit used to estimate and compensate for frequency and phase differences between a received signal's carrier wave and the receiver's local oscillator for the purpose of coherent demodulation.

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Category 5 cable

Category 5 cable, commonly referred to as Cat 5, is a twisted pair cable for computer networks.

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CATUAV

CATUAV S.L. is a technology-based private company that offers aerial services using unmanned aerial vehicles (UAV).

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Causes of cancer

Cancer is a disease caused by genetic changes leading to uncontrolled cell growth and tumor formation.

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Cavity magnetron

The cavity magnetron is a high-powered vacuum tube that generates microwaves using the interaction of a stream of electrons with a magnetic field while moving past a series of open metal cavities (cavity resonators).

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CB usage in the United States

In the United States, the CB Band Radio Service, or Citizens' Band ("CB"), known as the Class D Citizens' Radio Service before 1976, is one of several personal radio services defined by the FCC's Part 95 rules.

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CDMA2000

CDMA2000 (also known as C2K or IMT Multi‑Carrier (IMT‑MC)) is a family of 3G mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites.

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CEBus

CEBus(r), short for Consumer Electronics Bus, also known as EIA-600, is a set of electrical standards and communication protocols for electronic devices to transmit commands and data.

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Cell site

A cell site or cell tower is a cellular-enabled mobile device site where antennae and electronic communications equipment are placed — typically on a radio mast, tower, or other raised structure — to create a cell (or adjacent cells) in a cellular network.

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Cellular frequencies

Cellular frequencies are the sets of frequency ranges within the ultra high frequency band that have been assigned for cellular-compatible mobile devices, such as mobile phones, to connect to cellular networks.

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Cellulite

Cellulite (also known as adiposis edematosa, dermopanniculosis deformans, status protrusus cutis, gynoid lipodystrophy, and orange peel syndrome) is the herniation of subcutaneous fat within fibrous connective tissue that manifests topographically as skin dimpling and nodularity, often on the pelvic region (specifically the buttocks), lower limbs, and abdomen.

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Central apparatus room

In broadcast facilities, a central apparatus room (CAR, pronounced "C-A-R"), central machine room, or central equipment room (CER), or central technical area (CTA), or rack room is where shared equipment common to all technical areas is located.

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Ceravision

Ceravision is a privately owned lighting company based in Milton Keynes, UK.

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Certified Health Physicist

Certified Health Physicist is an official title granted by the, the certification board for health physicists in the United States.

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Channel (broadcasting)

In broadcasting, a channel or frequency channel is a designated radio frequency (or, equivalently, wavelength), assigned by a competent frequency assignment authority for the operation of a particular radio station, television station or television channel.

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Channel 1 branded TV stations in the United States

The following television stations in the United States brand as channel 1 (though not using virtual channel 1; nor is there a physical RF channel 1): 01 branded.

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Channel 10 branded TV stations in the United States

The following television stations in the United States brand as channel 10 (though neither using virtual channel 10 nor broadcasting on physical RF channel 10).

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Channel 11 branded TV stations in the United States

The following television stations in the United States brand as channel 11 (though neither using virtual channel 11 nor broadcasting on physical RF channel 11).

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Channel 12 branded TV stations in the United States

The following television stations in the United States brand as channel 12 (though neither using virtual channel 12 nor broadcasting on physical RF channel 12).

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Channel 13 branded TV stations in the United States

The following television stations in the United States brand as channel 13 (though neither using virtual channel 13 nor broadcasting on physical RF channel 13).

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Channel 14 branded TV stations in the United States

The following television stations in the United States brand as channel 14 (though neither using virtual channel 14 nor broadcasting on physical RF channel 14).

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Channel 15 branded TV stations in the United States

The following television stations in the United States brand as channel 15 (though neither using virtual channel 15 nor broadcasting on physical RF channel 15).

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Channel 16 branded TV stations in the United States

The following television stations in the United States brand as channel 16 (though neither using virtual channel 16 nor broadcasting on physical RF channel 16).

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Channel 16 VHF

Channel 16 VHF (156.8 MHz) is a marine VHF radio frequency designated as an international distress frequency.

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Channel 18 branded TV stations in the United States

The following television stations in the United States brand as channel 18 (though neither using virtual channel 18 nor broadcasting on physical RF channel 18).

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Channel 19 branded TV stations in the United States

The following television stations in the United States brand as channel 19 (though neither using virtual channel 19 nor broadcasting on physical RF channel 19).

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Channel 2 branded TV stations in the United States

The following television stations in the United States brand as channel 2 (though neither using virtual channel 2 nor broadcasting on physical RF channel 2).

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Channel 21 branded TV stations in the United States

The following television stations in the United States brand as channel 21 (though neither using virtual channel 21 nor broadcasting on physical RF channel 21): 21 branded.

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Channel 25 branded TV stations in the United States

The following television stations in the United States brand as channel 25 (though neither using virtual channel 25 nor broadcasting on physical RF channel 25).

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Channel 3 branded TV stations in the United States

The following television stations in the United States brand as channel 3 (though neither using virtual channel 3 nor broadcasting on physical RF channel 3).

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Channel 3/4 output

A channel 3/4 output was a common output selection for consumer audiovisual devices sold in North America that were intended to be connected to a TV using a radio frequency (RF) signal.

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Channel 4 branded TV stations in the United States

The following television stations in the United States brand as channel 4 (though neither using virtual channel 4 nor broadcasting on physical RF channel 4).

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Channel 5 branded TV stations in the United States

The following television stations in the United States brand as channel 5 (though neither using virtual channel 5 nor broadcasting on physical RF channel 5).

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Channel 58 branded TV stations in the United States

The following television stations in the United States brand as channel 58 (though neither using virtual channel 58 nor broadcasting on physical RF channel 58).

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Channel 6 branded TV stations in the United States

The following television stations in the United States brand as channel 6 (though neither using virtual channel 6 nor broadcasting on physical RF channel 6).

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Channel 61 branded TV stations in the United States

The following television stations in the United States brand as channel 61 (though neither using virtual channel 61 nor broadcasting on physical RF channel 61).

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Channel 7 branded TV stations in the United States

The following television stations in the United States brand as channel 7 (though neither using virtual channel 7 nor broadcasting on physical RF channel 7).

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Channel 8 branded TV stations in the United States

The following television stations in the United States brand as channel 8 (though neither using virtual channel 8 nor broadcasting on physical RF channel 8).

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Channel 9 branded TV stations in the United States

The following television stations in the United States brand as channel 9 (though neither using virtual channel 9 nor broadcasting on physical RF channel 9).

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Characteristic impedance

The characteristic impedance or surge impedance (usually written Z0) of a uniform transmission line is the ratio of the amplitudes of voltage and current of a single wave propagating along the line; that is, a wave travelling in one direction in the absence of reflections in the other direction.

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Charge qubit

In quantum computing, a charge qubit is a qubit whose basis states are charge states (e.g. states which represent the presence or absence of excess Cooper pairs in the island).

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Chemlink

Chemlink is a brand name for wireless video transmission products made by the Chung-Hsin Electric and Machinery Manufacturing Corporation (CHEM) Wireless Communication Division.

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Chirp

A chirp is a signal in which the frequency increases (up-chirp) or decreases (down-chirp) with time.

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Choke (electronics)

In electronics, a choke is an inductor used to block higher-frequency alternating current (AC) in an electrical circuit, while passing lower-frequency or direct current (DC).

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Chop shop

In motor vehicle theft, a chop shop is a location or business which disassembles stolen vehicles, primarily cars, for the purpose of selling its parts.

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Chromatron

The Chromatron is a color television cathode ray tube design invented by Nobel prize-winner Ernest Lawrence and developed commercially by Paramount Pictures, Sony, Litton Industries and others.

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CIPURSE

CIPURSE is an open security standard for transit fare collection systems.

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Circuit Merit

The Circuit Merit system is a measurement process designed to assess the voice-to-noise ratio in wired and wireless telephone circuits, and although its reporting scale is sometimes used as input for calculating Mean Opinion Score, the rating system is officially defined relative to given ranges of voice-to-noise ratios.

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Circulator

A circulator is a passive non-reciprocal three- or four-port device, in which a microwave or radio frequency signal entering any port is transmitted to the next port in rotation (only).

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Clansman

Clansman is the name of a combat net radio system (CNR) used by the British Army from 1976 to 2010.

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Clock network

A clock network or clock system is a set of synchronized clocks designed to always show exactly the same time by communicating with each other.

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CMOS

Complementary metal–oxide–semiconductor, abbreviated as CMOS, is a technology for constructing integrated circuits.

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Co-fired ceramic

Co-fired ceramic devices are monolithic, ceramic microelectronic devices where the entire ceramic support structure and any conductive, resistive, and dielectric materials are fired in a kiln at the same time.

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Coase theorem

In law and economics, the Coase theorem describes the economic efficiency of an economic allocation or outcome in the presence of externalities.

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Coaxial cable

Cross-sectional view of a coaxial cable Coaxial cable, or coax (pronounced), is a type of electrical cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield.

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Cobham plc

Cobham plc is a British manufacturing company based in Wimborne Minster, Dorset, England.

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Cochlea

The cochlea is the part of the inner ear involved in hearing.

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Cognio

Cognio, Inc. was an American company that developed and marketed radio frequency (RF) spectrum analysis products that find and solve channel interference problems on wireless networks and in wireless applications.

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Cognitive radio

A cognitive radio (CR) is a radio that can be programmed and configured dynamically to use the best wireless channels in its vicinity to avoid user interference and congestion.

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Coherer

The coherer was a primitive form of radio signal detector used in the first radio receivers during the wireless telegraphy era at the beginning of the 20th century.

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Collins 207B-1 Transmitter

The Collins 207B-1 was a radio transmitter manufactured in 1951 by Collins Radio Company.

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Colony collapse disorder

Colony collapse disorder (CCD) is the phenomenon that occurs when the majority of worker bees in a colony disappear and leave behind a queen, plenty of food and a few nurse bees to care for the remaining immature bees.

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Columbus Blue Jackets Radio Network

The Eldorado Scioto Downs Columbus Blue Jackets Radio Network is a 37 station radio network operated by the Columbus Blue Jackets of the National Hockey League that provides broadcasts for all the team's games.

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Comb generator

A comb generator is a signal generator that produces multiple harmonics of its input signal.

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Combat-net radio

In telecommunication, a combat-net radio (CNR) is a radio operating in a network that (a) provides a half-duplex circuit and (b) uses either a single radio frequency or a discrete set of radio frequencies when in a frequency hopping mode.

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Commodore 16

The Commodore 16 is a home computer made by Commodore International with a 6502-compatible 7501 or 8501 CPU, released in 1984 and intended to be an entry-level computer to replace the VIC-20.

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Commodore 64

The Commodore 64, also known as the C64 or the CBM 64, is an 8-bit home computer introduced in January 1982 by Commodore International (first shown at the Consumer Electronics Show, in Las Vegas, January 7–10, 1982).

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Commodore Plus/4

The Commodore Plus/4 is a home computer released by Commodore International in 1984.

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Common Interface

In Digital Video Broadcasting, the Common Interface (also called DVB-CI) is a technology which allows decryption of pay TV channels.

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Common-mode signal

Common-mode signal is the component of an analog signal which is present with one sign on all considered conductors.

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Communication channel

A communication channel or simply channel refers either to a physical transmission medium such as a wire, or to a logical connection over a multiplexed medium such as a radio channel in telecommunications and computer networking.

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Communications law

Communications law refers to the regulation of electronic communications by wire or radio.

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Communications receiver

A communications receiver is a type of radio receiver used as a component of a radio communication link.

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Communications-based train control

Communications-based train control (CBTC) is a railway signaling system that makes use of the telecommunications between the train and track equipment for the traffic management and infrastructure control.

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Compact Linear Collider

The Compact Linear Collider (CLIC) is a concept for a future linear particle accelerator that aims to explore the next energy frontier.

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Comparison of CRT, LCD, and plasma

Category:Television technology Category:Display technology.

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Comparison of mobile phone standards

This is a comparison of standards of mobile phones.

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Compatible sideband transmission

A Compatible sideband transmission, also known as amplitude modulation equivalent (AME) or Single sideband-reduced carrier (SSB-RC), is a type of single sideband RF modulation in which the carrier is deliberately reinserted at a lower level after its normal suppression to permit reception by conventional AM receivers.

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Composite monitor

A composite monitor is any analog video display that receives input in the form of an analog composite video signal to a defined specification.

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Computational electromagnetics

Computational electromagnetics, computational electrodynamics or electromagnetic modeling is the process of modeling the interaction of electromagnetic fields with physical objects and the environment.

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Computer keyboard

In computing, a computer keyboard is a typewriter-style device which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches.

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Concordia Station

Concordia Research Station, which opened in 2005, is a French-Italian research facility that was built above sea level at a location called Dome C on the Antarctic Plateau, Antarctica.

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Conder plot

A Conder plot is a two-dimensional visualisation of radiofrequency power flux density and/or interference with reference to geographical location.

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Continental Electronics

Continental Electronics is a major American manufacturer of broadcast and military radio transmitters, based in Dallas, Texas.

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Continuous Tone-Coded Squelch System

In telecommunications, Continuous Tone-Coded Squelch System or CTCSS is a circuit that is used to reduce the annoyance of listening to other users on a shared two-way radio communications channel.

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Convective storm detection

Convective storm detection is the meteorological observation of deep, moist convection (DMC) and consists of detection, monitoring, and short-term prediction.

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Copper in renewable energy

Renewable energy sources such as solar, wind, tidal, hydro, biomass, and geothermal have become significant sectors of the energy market.

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Cordless telephone

A cordless telephone or portable telephone is a telephone in which the handset is portable and communicates with the body of the phone by radio, instead of being attached by a cord.

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Counterpoise (ground system)

In electronics and radio communication a counterpoise is a network of suspended horizontal wires or cables (or a metal screen), used as a substitute for an earth (ground) connection in a radio antenna system.

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Coupon-eligible converter box

A coupon-eligible converter box (CECB) was a digital television adapter that met eligibility specifications for subsidy "coupons" from the United States government.

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Credence Systems

Credence Systems Corporation was a manufacturer of test equipment for the global semiconductor industry, with a major focus on solving specific challenges facing the fast-growing consumer-driven semiconductor markets.

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Crossband operation

Crossband (cross-band, cross band) operation is a method of telecommunication in which a radio station receives signals on one frequency and simultaneously transmits on another for the purpose of full duplex communication or signal relay.

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Cryolipolysis

Cryolipolysis is a non invasive body contouring treatment used to reduce fat cell volume by freezing.

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Cryomodule

A cryomodule is a section of a modern particle accelerator composed of superconducting RF (SRF) acceleration cavities, and needs very low operating temperatures (around 2 kelvins).

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Cryoneurolysis

Cryoneurolysis, also referred to as cryoanalgesia, is a medical procedure that temporarily blocks nerve conduction along peripheral nerve pathways.

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Cryptanalysis of the Lorenz cipher

Cryptanalysis of the Lorenz cipher was the process that enabled the British to read high-level German army messages during World War II.

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Crystal detector

A crystal detector is an obsolete electronic component in some early 20th century radio receivers that used a piece of crystalline mineral as a detector (demodulator) to rectify the alternating current radio signal to extract the audio modulation which produced the sound in the earphones.

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Crystal radio

A crystal radio receiver, also called a crystal set, is a simple radio receiver, popular in the early days of radio.

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CTX (explosive-detection device)

The CTX (Computer Tomography X-ray) is an explosive detection device, a family of x-ray devices developed by InVision Technologies in 1990 that uses CAT scans and sophisticated image processing software to automatically screen checked baggage for explosives.

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CubETH

CubETH is a Swiss satellite project.

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Cut-off (electronics)

In electronics, cut-off is a state of negligible conduction that is a property of several types of electronic components when a control parameter (that usually is a well-defined voltage or electric current, but could also be an incident light intensity or a magnetic field), is lowered or increased past a value (the conduction threshold).

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Cyclotron

A cyclotron is a type of particle accelerator invented by Ernest O. Lawrence in 1929-1930 at the University of California, Berkeley, and patented in 1932.

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Cygnus X-3

Cygnus X-3 is one of the stronger binary X-ray sources in the sky.

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Cypress Semiconductor

Cypress Semiconductor Corporation is an American semiconductor design and manufacturing company.

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D band (NATO)

The NATO D band is the obsolete designation given to the radio frequencies from 1.0 to 2.0 GHz (equivalent to wavelengths between 30 and 15 cm) during the cold war period.

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D band (waveguide)

The waveguide D band is the range of radio frequencies from 110 GHz to 170 GHz in the electromagnetic spectrum, corresponding to the recommended frequency band of operation of the WR6 and WR7 waveguides.

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DAMP Project

The Downrange Anti-missile Measurement Program or DAMP was an applied research project to obtain scientific data, just prior to and during re-entry, on intermediate- and intercontinental-range ballistic missiles as they returned to earth.

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Danielle George

Danielle Amanda George MBE (née Kettle; born 1975/6) is a Professor of Radio frequency engineering in the School of Electrical and Electronic Engineering (EEE) and Associate Dean for Teaching and Learning at the University of Manchester in the UK.

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Data transmission

Data transmission (also data communication or digital communications) is the transfer of data (a digital bitstream or a digitized analog signal) over a point-to-point or point-to-multipoint communication channel.

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David Rutledge (engineer)

Dr.

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DC block

DC Blocks are coaxial components that prevent the flow of audio and direct current (DC) frequencies while offering minimum interference to RF signals.

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Deep Space Optical Communications

Deep Space Optical Communications (DSOC) is a laser space communication system in development meant to improve communications performance 10 to 100 times over the current radio frequency technology without incurring increases in mass, volume or power.

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Detector (radio)

In radio, a detector is a device or circuit that extracts information from a modulated radio frequency current or voltage.

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Devra Davis

Devra Lee Davis, (born June 7, 1946) is an American epidemiologist and writer.

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Dielectric barrier discharge

Dielectric-barrier discharge (DBD) is the electrical discharge between two electrodes separated by an insulating dielectric barrier.

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Dielectric heating

Dielectric heating, also known as electronic heating, RF (radio frequency) heating, and high-frequency heating, is the process in which a radio frequency alternating electric field, or radio wave or microwave electromagnetic radiation heats a dielectric material.

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Difference in the depth of modulation

The difference in the depth of modulation or DDM is used by instrument landing systems in conjunction with the associated airborne receiving equipment to define a position in airspace.

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Diffuse field acoustic testing

Diffuse field acoustic testing is the testing of the mechanical resistance of a spacecraft to the acoustic pressures during launch.

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Digital access carrier system

Digital access carrier system (DACS) is the name used by British Telecom (BT Group plc) in the United Kingdom for a 0+2 pair gain system.

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Digital channel election

A digital channel election was the process by which television stations in the United States chose which physical radio-frequency TV channel they would permanently use after the analog shutdown in 2009.

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Digital down converter

In digital signal processing, a digital down-converter (DDC) converts a digitized, band limited signal to a lower frequency signal at a lower sampling rate in order to simplify the subsequent radio stages.

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Digital Opportunity Investment Trust

Digital Opportunity Investment Trust (DOIT) is a proposal to create a United States federal trust to distribute, for educational purposes, funds to be raised by public auctions of licenses to use radio frequency bands.

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Digital radio frequency memory

Digital Radio Frequency Memory (DRFM) is an electronic method for digitally capturing and retransmitting RF signal.

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Digital subchannel

In broadcasting, digital subchannels are a method of transmitting more than one independent program stream simultaneously from the same digital radio or television station on the same radio frequency channel.

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Digital television adapter

A digital television adapter (DTA), commonly known as a converter box, is a television tuner that receives a digital television (DTV) transmission, and converts the digital signal into an analog signal that can be received and displayed on an analog television set.

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Digital terrestrial television

Digital terrestrial television (DTTV or DTT) is a technology for broadcast television in which land-based (terrestrial) television stations broadcast television content by radio waves to televisions in consumers' residences in a digital format.

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Diode

A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance); it has low (ideally zero) resistance in one direction, and high (ideally infinite) resistance in the other.

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DIP switch

A DIP switch is a manual electric switch that is packaged with others in a group in a standard dual in-line package (DIP).

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Direct TPMS

Direct TPMS, or direct tire pressure monitoring systems (direct sensor TPMS) refers to the use of a pressure sensor directly mounted on the wheels or tires of a vehicle.

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Directed-energy weapon

A directed-energy weapon (DEW) is a ranged weapon system that inflicts damage at a target by emission of highly focused energy, including laser, microwaves and particle beams.

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Direction of arrival

In signal processing literature, direction of arrival (DOA) denotes the direction from which usually a propagating wave arrives at a point, where usually a set of sensors are located.

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Distance-bounding protocol

Distance bounding protocols are cryptographic protocols that enable a verifier V to establish an upper bound on the physical distance to a prover P. They are based on timing the delay between sending out challenge bits and receiving back the corresponding response bits.

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Distortion

Distortion is the alteration of the original shape (or other characteristic) of something.

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Distributed active transformer

Distributed active transformer is a circuit topology that allows low-voltage transistors to be used to generate large amounts of RF (radio frequency) power.

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Distributed element circuit

Distributed element circuits are electrical circuits composed of lengths of transmission lines or other distributed components.

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DO-160

DO-160, Environmental Conditions and Test Procedures for Airborne Equipment is a standard for the environmental testing of avionics hardware.

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Doherty amplifier

The Doherty amplifier is a modified class B radio frequency amplifier invented by William H. Doherty of Bell Telephone Laboratories Inc in 1936.

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Donald Ewen Cameron

Donald Ewen Cameron (–) — known as D. Ewen Cameron or Ewen Cameron — was a Scottish-born psychiatrist who served as President of the American Psychiatric Association (1952–1953), Canadian Psychiatric Association (1958-1959), American Psychopathological Association (1963), Society of Biological Psychiatry (1965) and World Psychiatric Association (1961-1966).

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Driven element

In a multielement antenna array (such as a Yagi-Uda antenna), the driven element or active element is the element in the antenna (typically a metal rod) which is electrically connected to the receiver or transmitter. In a transmitting antenna it is driven or excited by the RF current from the transmitter, and is the source of the radio waves. In a receiving antenna it collects the incoming radio waves for reception, and converts them to tiny oscillating electric currents, which are applied to the receiver. Multielement antennas like the Yagi typically consist of a driven element, connected to the receiver or transmitter through a feed line, and a number of other elements which are not driven, called parasitic elements. The driven element is often a dipole. The parasitic elements act as resonators and couple electromagnetically with the driven element, and serve to modify the radiation pattern of the antenna, directing the radio waves in one direction, increasing the gain of the antenna. An antenna may have more than one driven element, although the most common multielement antenna, the Yagi, usually has only one. For example, transmitting antennas for AM radio stations often consist of several mast radiators, each of which functions as a half-wave monopole driven element, to create a particular radiation pattern. A two-element array with the elements spaced a quarter wavelength apart has a distinct cardioid radiation pattern when the second element is driven with a source -90° out of phase relative to the first element. A log-periodic antenna (LPDA) consists of many dipole elements of decreasing length, all of which are driven. However because they are different lengths, only one of the many dipoles is resonant at a given frequency, so only one is driven at a time. The dipole that is driven depends on the frequency of the signal. Phased arrays may have hundreds of driven elements. Household multiband television antennas generally consist of a hybrid between a UHF Yagi with one driven dipole and a log-periodic for VHF behind that with alternating active elements. The driven elements between the UHF and VHF are then coupled and often matched for a 75 ohm coaxial downlead to the receiver. When a "driven element" is referred to in an antenna array, it is often assumed that other elements are not driven (i.e. parasitic, passive) and that the array is tightly coupled (spacing far below a wavelength). Category:Antennas (radio).

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DS-P1-Yu

DS-P1-Yu was a series of Soviet satellites developed by the Yuzhnoye Design Office of Ukraine, for use in calibrating the Dnestr space surveillance and early-warning radar system.

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Dummy load

A dummy load is a device used to simulate an electrical load, usually for testing purposes.

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DVB-C

DVB-C stands for "Digital Video Broadcasting - Cable" and it is the DVB European consortium standard for the broadcast transmission of digital television over cable.

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DVB-T

DVB-T is an abbreviation for "Digital Video Broadcasting — Terrestrial"; it is the DVB European-based consortium standard for the broadcast transmission of digital terrestrial television that was first published in 1997 and first broadcast in the UK in 1998.

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DX cluster

A DX cluster is a network of computers, each running a software package dedicated to gathering, and disseminating, information on amateur radio DX (long-distance contact) activities.

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E band (NATO)

The NATO E band is a designation given to the radio frequencies from 2 000 to 3 000 MHz (equivalent to wavelengths between 15 and 10 cm) during the cold war period.

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E band (waveguide)

The waveguide E band is the range of radio frequencies from 60 GHz to 90 GHz in the electromagnetic spectrum, corresponding to the recommended frequency band of operation of WR12 waveguides.

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Earth's field NMR

Nuclear magnetic resonance (NMR) in the geomagnetic field is conventionally referred to as Earth's field NMR (EFNMR).

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Eduard Karplus

Eduard Karplus (September 7, 1899 – August ?, 1979) was an Austrian-born engineer, best known as the inventor of the Variac.

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Edwards Air Force Base

Edwards Air Force Base (AFB) is a United States Air Force installation located in Kern County in southern California, about northeast of Lancaster and east of Rosamond.

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Effective radiated power

Effective radiated power (ERP), synonymous with equivalent radiated power, is an IEEE standardized definition of directional radio frequency (RF) power, such as that emitted by a radio transmitter.

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EIA RF Connectors

EIA RF Connectors are used to connect two items of high power radio frequency rigid or semi-rigid (flexline) coaxial transmission line.

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Eimac

Eimac is a trade mark of Eimac Products, part of the Microwave Power Products Division of Communications & Power Industries.

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Eldorado Institute

The Eldorado Research Institute (In Portuguese: Instituto de Pesquisas Eldorado) is a non-profit research, development and innovation institution with its headquarters located in Campinas, São Paulo, Brazil.

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Elecraft

Elecraft, Inc. is an American manufacturer of amateur radio ("ham") equipment and kits, based in Watsonville, California.

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Electric beacon

In navigation, an electric beacon (or electromagnetic beacon) is a kind of beacon, a device which marks a fixed location and allows direction finding equipment to find relative bearing, the direction to the beacon.

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Electric current

An electric current is a flow of electric charge.

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Electric organ

An electric organ, also known as electronic organ, is an electronic keyboard instrument which was derived from the harmonium, pipe organ and theatre organ.

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Electric spark

An electric spark is an abrupt electrical discharge that occurs when a sufficiently high electric field creates an ionized, electrically conductive channel through a normally-insulating medium, often air or other gases or gas mixtures.

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Electric Tokamak

The UCLA Electric Tokamak is a low field (0.25 T) magnetic fusion tokamak device with a large aspect ratio.

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Electrical length

In telecommunications and electrical engineering, electrical length (or phase length) refers to the length of an electrical conductor in terms of the phase shift introduced by transmission over that conductor at some frequency.

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Electrical termination

In electronics, electrical termination is the practice of ending a transmission line with a device that matches the characteristic impedance of the line.

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Electricity

Electricity is the set of physical phenomena associated with the presence and motion of electric charge.

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Electrodeless lamp

The internal electrodeless lamp or induction lamp is a gas discharge lamp in which an electric or magnetic field transfers the power required to generate light from outside the lamp envelope to the gas inside.

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Electrodeless plasma thruster

The electrodeless plasma thruster is a spacecraft propulsion engine commercialized under the acronym "E-IMPAcT" for "Electrodeless-Ionization Magnetized Ponderomotive Acceleration Thruster".

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Electrolytic detector

The electrolytic detector, or liquid barretter, was a type of detector (demodulator) used in early radio receivers.

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Electromagnetic coil

An electromagnetic coil is an electrical conductor such as a wire in the shape of a coil, spiral or helix.

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Electromagnetic interference

Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction.

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Electromagnetic shielding

Electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials.

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Electron nuclear double resonance

Electron nuclear double resonance (ENDOR) is a magnetic resonance technique for elucidating the molecular and electronic structure of paramagnetic species.

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Electronic engineering

Electronic engineering (also called electronics and communications engineering) is an electrical engineering discipline which utilizes nonlinear and active electrical components (such as semiconductor devices, especially transistors, diodes and integrated circuits) to design electronic circuits, devices, VLSI devices and their systems.

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Electronic oscillator

An electronic oscillator is an electronic circuit that produces a periodic, oscillating electronic signal, often a sine wave or a square wave.

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Electronic pest control

Electronic pest control is the name given to any of several types of electrically powered devices designed to repel or eliminate pests, usually rodents or insects.

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Electronic tagging

Electronic tagging is a form of surveillance which uses an electronic device, fitted to the person.

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Electronic warfare

Electronic warfare (EW) is any action involving the use of the electromagnetic spectrum or directed energy to control the spectrum, attack of an enemy, or impede enemy assaults via the spectrum.

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Electrophysiology study

A cardiac electrophysiology study (EP test or EP study) is a minimally invasive procedure that tests the electrical conduction system of the heart to assess the electrical activity and conduction pathways of the heart.

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Electrosurgery

Electrosurgery is the application of a high-frequency (radio frequency) alternating polarity, electrical current to biological tissue as a means to cut, coagulate, desiccate, or fulgurate tissue.

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Elevated photography

Elevated photography is the process of taking aerial photos using a telescoping pole or mast, or other aerial or elevated support systems, to emulate aerial photographs, or video, taken from a commercially licensed aircraft.

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Elta Systems

ELTA Systems Ltd is an Israeli provider of defense products and services specializing in radar, C4ISTAR, RF, SIGINT and EW products.

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EM Solutions

EM Solutions Pty Ltd is a satellite communications component company based in Brisbane, Queensland, Australia.

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EMC problem (excessive field strength)

An EMC problem (or Electromagnetic compatibility problem) occurs when one piece of electronic equipment or an electromagnetic system is adversely affected the operation of another.

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Emley Moor transmitting station

Emley Moor transmitting station is a telecommunications and broadcasting facility on Emley Moor, west of the village centre of Emley, in Kirklees, West Yorkshire, England, made up of a concrete tower and apparatus which began transmitting in 1971.

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EnOcean

The EnOcean technology is an energy harvesting wireless technology used primarily in building automation systems, and is also applied to other applications in industry, transportation, logistics and smart homes.

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Envelope tracking

Envelope tracking (ET) describes an approach to radio frequency (RF) amplifier design in which the power supply voltage applied to the RF power amplifier is continuously adjusted to ensure that the amplifier is operating at peak efficiency for power required at each instant of transmission.

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Erciyes University Radio Observatory

The Erciyes University Astronomy and Space Science Observatory Applied Research Center (Erciyes Üniversitesi Astronomi ve Uzay Bilimleri Gözlemevi Uygulama ve Araştırma Merkezi.) (UZAYBİMER) is a radio astronomy observatory operated by the Astronomy and Space Sciences Department at Erciyes University's Faculty of Science.

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Error concealment

Error concealment is a technique used in signal processing that aims to minimize the deterioration of signals caused by missing data, called packet loss.

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Eurobalise

An Eurobalise is a specific variant of a balise being a transponder placed between the rails of a railway.

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European Telecommunications Satellite Organization

The European Telecommunications Satellite Organization (EUTELSAT IGO) is an intergovernmental organisation consisting of 49 member states.

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Evaporative cooling (atomic physics)

Evaporative cooling is an atomic physics technique to achieve high phase space densities which optical cooling techniques typically can not reach.

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Executive Order 13010

On July 15th, 1996, President Bill Clinton issued Executive Order 13010.

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ExoMars Trace Gas Orbiter

The ExoMars Trace Gas Orbiter (TGO) is a collaborative project between the European Space Agency (ESA) and Roscosmos that sent an atmospheric research orbiter and the ''Schiaparelli'' demonstration lander to Mars in 2016 as part of the European-led ExoMars programme.

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Extended interaction oscillator

The extended interaction oscillator (EIO) is a linear-beam vacuum tube designed to convert direct current to RF power.

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Extremely high frequency

Extremely high frequency (EHF) is the International Telecommunication Union (ITU) designation for the band of radio frequencies in the electromagnetic spectrum from 30 to 300 gigahertz (GHz).

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EZ-Link

The EZ-Link card is a contactless smart card based on the Sony FeliCa smart card technology and used for the payment of public transportation fares in Singapore, with limited use in the small payments retail sector.

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F band (NATO)

The NATO F band is the obsolete designation given to the radio frequencies from 3 000 to 4 000 MHz (equivalent to wavelengths between 10 and 7.5 cm) during the cold war period.

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F band (waveguide)

The waveguide F band is the range of radio frequencies from 90 GHz to 140 GHz in the electromagnetic spectrum, corresponding to the recommended frequency band of operation of WR8 waveguides.

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F crimp

F-crimp is a type of solderless electrical crimp connection.

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Facial rejuvenation

Facial rejuvenation is a cosmetic treatment (or series of cosmetic treatments), which aims to restore a youthful appearance to the human face.

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Failure of electronic components

Electronic components have a wide range of failure modes.

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Fawwaz T. Ulaby

Fawwaz T. Ulaby (فواز علبي) is Arthur F. Thurnau Professor of Electrical Engineering and Computer Science at the University of Michigan in Ann Arbor and formerly the Founding Provost and Executive Vice President of the King Abdullah University of Science and Technology (KAUST) and R. Jamieson and Betty Williams Professor of Electrical Engineering and Computer Science at the University of Michigan.

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FCC Declaration of Conformity

The FCC Declaration of Conformity or the FCC label or the FCC mark is a certification mark employed on electronic products manufactured or sold in the United States which certifies that the electromagnetic interference from the device is under limits approved by the Federal Communications Commission.

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Federal Communications Commission

The Federal Communications Commission (FCC) is an independent agency of the United States government created by statute (and) to regulate interstate communications by radio, television, wire, satellite, and cable.

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Federal Network Agency

The Federal Network Agency (Bundesnetzagentur or BNetzA) is the German regulatory office for electricity, gas, telecommunications, post and railway markets.

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Feed horn

In parabolic antennas such as satellite dishes, a feed horn (or feedhorn) is a small horn antenna used to convey radio waves between the transmitter and/or receiver and the parabolic reflector.

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Feed line

In a radio antenna, the feed line (feedline), or feeder, is the cable or other transmission line that connects the antenna with the radio transmitter or receiver.

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Feedback

Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop.

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Feedthrough

A feedthrough is a conductor used to carry a signal through an enclosure or printed circuit board.

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Femtocell

In telecommunications, a femtocell is a small, low-power cellular base station, typically designed for use in a home or small business.

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Ferrite (magnet)

A ferrite is a ceramic material made by mixing and firing large proportions iron(III) oxide (Fe2O3, rust) blended with small proportions of one or more additional metallic elements, such as barium, manganese, nickel, and zinc.

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Ferrite bead

A ferrite bead or ferrite choke is a passive electric component that suppresses high frequency noise in electronic circuits.

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Ferrite core

In electronics, a ferrite core is a type of magnetic core made of ferrite on which the windings of electric transformers and other wound components such as inductors are formed.

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FFAG accelerator

A Fixed-Field Alternating Gradient accelerator (FFAG) is a circular particle accelerator concept on which development was started in the early 50s, and that can be characterized by its time-independent magnetic fields (fixed-field, like in a cyclotron) and the use of strong focusing (alternating gradient, like in a synchrotron).

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Fiber laser

A fiber laser or fibre laser is a laser in which the active gain medium is an optical fiber doped with rare-earth elements such as erbium, ytterbium, neodymium, dysprosium, praseodymium, thulium and holmium.

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Fiberglass

Fiberglass (US) or fibreglass (UK) is a common type of fiber-reinforced plastic using glass fiber.

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Field strength

In physics, field strength means the magnitude of a vector-valued field (e.g., in volts per meter, V/m, for an electric field E).

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Field strength meter

In telecommunications, a field strength meter is an instrument that measures the electric field strength emanating from a transmitter.

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Filter (signal processing)

In signal processing, a filter is a device or process that removes some unwanted components or features from a signal.

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Filter capacitor

Filter capacitors are capacitors used for filtering of undesirable frequencies.

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Fingerprint

A fingerprint in its narrow sense is an impression left by the friction ridges of a human finger.

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Finnish Defence Intelligence Agency

The Finnish Defence Intelligence Agency is the combined signals (SIGINT), geospatial (GEOINT) and imagery intelligence (IMINT) agency of the Finnish Defence Forces.

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Firearms unit

A firearms unit is an armed unit within each territorial police force in the United Kingdom.

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Five Star Jubilee

Five Star Jubilee is an American country music variety show carried by NBC-TV from March 17–September 22, 1961.

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Flip angle

The flip angle is the rotation of the net magnetization vector by a radiofrequency pulse relative to the main magnetic field.

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Florida Power & Light

Florida Power & Light Company (FPL), the principal subsidiary of NextEra Energy Inc.

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FM broadcasting in Australia

FM broadcasting started in Australian capital cities in 1947 on an "experimental" basis, using a (monaural) ABC national network feed, consisting largely of classical music and Parliament, as a programme source.

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Folded unipole antenna

The folded unipole antenna is a type of monopole antenna; it consists of a vertical metal rod or mast mounted over a conductive surface called a ground plane.

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Forbidden Siren 2

Forbidden Siren 2, known in Japan as is a survival horror stealth game developed by Project Siren and published by Sony Computer Entertainment for the PlayStation 2 in 2006.

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Forest Industries Telecommunications

Forest Industries Telecommunications (FIT) is a Federal Communications Commission (FCC) certified frequency coordinator and a non-profit association.

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Foster–Seeley discriminator

The Foster–Seeley discriminator is a common type of FM detector circuit, invented in 1936 by Dudley E. Foster and Stuart William Seeley.

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Foturan

Foturan (notation of the manufacturer: FOTURAN) is a photosensitive glass by SCHOTT Corporation developed in 1984.

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FOUP

FOUP is an acronym for Front Opening Unified Pod or Front Opening Universal Pod.

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Fourier-transform ion cyclotron resonance

Fourier-transform ion cyclotron resonance mass spectrometry is a type of mass analyzer (or mass spectrometer) for determining the mass-to-charge ratio (m/z) of ions based on the cyclotron frequency of the ions in a fixed magnetic field.

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Frequency assignment

Frequency assignment is the authorization of use of a particular radio frequency.

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Frequency changer

A frequency changer or frequency converter is an electronic or electromechanical device that converts alternating current (AC) of one frequency to alternating current of another frequency.

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Frequency comb

An optical frequency comb is a laser source whose spectrum consists of a series of discrete, equally spaced frequency lines.

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Frequency coordination

Frequency Coordination is a technical and regulatory process that removes or mitigates radio-frequency interference between different radio systems that operate on the same frequency.

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Frequency counter

A frequency counter is an electronic instrument, or component of one, that is used for measuring frequency.

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Frequency modulation

In telecommunications and signal processing, frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave.

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Frequency offset

In radio engineering, a frequency offset is an intentional slight shift of broadcast radio frequency (RF), to reduce interference with other transmitters.

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Frequency sharing

In telecommunication, frequency sharing is the assignment to or use of the same radio frequency by two or more stations that are separated geographically or that use the frequency at different times.

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Frequency-Agile Solar Radiotelescope

Frequency-Agile Solar Radiotelescope (FASR) is a next-generation radio telescope for solar observation in radio and microwave frequency range.

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Frequency-shift keying

Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier signal.

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Fresnel zone antenna

Fresnel zone antennas are reflector antennas that focus the signal by using the phase shifting property of the antenna surface, rather than its shape.

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Fringe (season 1)

The first season of the American science fiction television series Fringe commenced airing on the Fox network on September 9, 2008, and concluded on May 12, 2009.

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Future Combat Systems Manned Ground Vehicles

The Future Combat Systems Manned Ground Vehicles (MGV) was a family of lighter and more transportable ground vehicles developed by BAE Systems Inc and General Dynamics as part of the United States Army's Future Combat Systems (FCS) program.

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G band (NATO)

The NATO G band is the obsolete designation given to the radio frequencies from 4 000 to 6 000 MHz (equivalent to wavelengths between 7.5 and 5 cm) during the cold war period.

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Gabriel M. Rebeiz

Gabriel M. Rebeiz is a Lebanese-American electrical and computer engineer, currently the Wireless Communications Industry Chair Chair and Professor at University of California, San Diego.

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Gain (electronics)

In electronics, gain is a measure of the ability of a two-port circuit (often an amplifier) to increase the power or amplitude of a signal from the input to the output port by adding energy converted from some power supply to the signal.

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Gain compression

Gain compression is a reduction in "differential" or "slope" gain caused by nonlinearity of the transfer function of the amplifying device.

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Galeb (computer)

Galeb (en. Seagull) was an 8-bit computer developed by the PEL Varaždin company in Yugoslavia in the early 1980s.

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Gallium nitride

Gallium nitride is a binary III/V direct bandgap semiconductor commonly used in light-emitting diodes since the 1990s.

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Game Park

Game Park was a South Korean company that was founded in 1996 and went bankrupt in March 2007.

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GameCube

The GameCube is a home video game console released by Nintendo in Japan and North America in 2001 and Europe and Australia in 2002.

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GameCube accessories

This is a list of Nintendo GameCube accessories.

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GameCube controller

The GameCube controller is the standard controller for Nintendo's GameCube video game console.

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George Harold Brown

George Harold Brown (14 October 1908 – 11 December 1987) was an American research engineer.

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Ghosting (television)

In television, a ghost is a replica of the transmitted image, offset in position, that is super-imposed on top of the main image.

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Gigabit Wireless

Gigabit Wireless is the name given to wireless communication systems whose data transfer speeds exceed reach or exceed one gigabit (one billion bits) per second.

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Gildeskål

Gildeskål is a municipality in Nordland county, Norway.

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GL Mk. I radar

Gun Laying radar, Mark I, or GL Mk.

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GL Mk. III radar

Gun Laying radar, Mark III, or GL Mk.

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Global surveillance disclosures (2013–present)

Ongoing news reports in the international media have revealed operational details about the United States National Security Agency (NSA) and its international partners' global surveillance of foreign nationals and U.S. citizens.

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Glossary of electrical and electronics engineering

Most of the terms listed in Wikipedia glossaries are already defined and explained within Wikipedia itself.

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Glossary of video terms

This glossary defines terms that are used in the document, developed by the.

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GMA News TV

GMA News TV (GNTV) (visually rendered in its logo in all capital letters) is a commercial broadcast television network in the Philippines.

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GNU Radio

GNU Radio is a free software development toolkit that provides signal processing blocks to implement software-defined radios and signal-processing systems.

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Gold

Gold is a chemical element with symbol Au (from aurum) and atomic number 79, making it one of the higher atomic number elements that occur naturally.

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Gold Apollo

Gold Apollo Co., Ltd. is a manufacturer specialized in wireless paging system, with wide spectrum of products which can offer total solution to various occasions and customized paging systems.

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Goldschmidt alternator

The Goldschmidt alternator or reflector alternator, invented in 1908 by German engineer Rudolph Goldschmidt, was a rotating machine which generated radio frequency alternating current and was used as a radio transmitter.

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Graphene nanoribbon

Graphene nanoribbons (GNRs, also called nano-graphene ribbons or nano-graphite ribbons) are strips of graphene with width less than 50 nm.

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Gravity Recovery and Climate Experiment

The Gravity Recovery and Climate Experiment (GRACE) was a joint mission of NASA and the German Aerospace Center.

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GRB 970228

GRB 970228"GRB" indicates that the event was a gamma-ray burst, and the numbers follow a YYMMDD format corresponding to the date on which the burst occurred: 28 February 1997.

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GRB 970508

GRB 970508 was a gamma-ray burst (GRB) detected on May 8, 1997, at 21:42 UTC.

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Gregory Charvat

Gregory L. Charvat is author of Small and Short-Range Radar Systems, Co-Founder of Butterfly Network Inc, and advisor to the Camera Culture Group at Massachusetts Institute of Technology MIT Media Lab.

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Grid dip oscillator

Grid dip oscillator (GDO), also called grid dip meter, dip meter, dipmeter, or just dipper, is a measuring instrument to measure resonant frequency of radio frequency circuits.

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Grimeton Radio Station

Grimeton Radio Station in southern Sweden, close to Varberg in Halland, is an early longwave transatlantic wireless telegraphy station built in 1922-1924, that has been preserved as a historical site.

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Ground (electricity)

In electrical engineering, ground or earth is the reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the earth.

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Ground loop (electricity)

In an electrical system, a ground loop or earth loop occurs when two points of a circuit both intended to be at ground reference potential have a potential between them.

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Ground plane

In electrical engineering, a ground plane is an electrically conductive surface, usually connected to electrical ground.

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Ground segment

A ground segment consists of all the ground-based elements of a spacecraft system used by operators and support personnel, as opposed to the space segment and user segment.

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GSM

GSM (Global System for Mobile communications) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation digital cellular networks used by mobile devices such as tablets, first deployed in Finland in December 1991.

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GSM Radio Frequency optimization

GSM radio frequency optimization (GSM RF optimisation) is the optimization of GSM radio frequencies.

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GU-50

The GU-50 (Russian: ГУ-50) is a power pentode vacuum tube intended for 50 watt operation as a linear RF amplifier on frequencies up to 120 MHz.

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Guangzhou Metro

Guangzhou Metro is the metro system of the city of Guangzhou in Guangdong Province of China.

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H band (NATO)

The NATO H band is the obsolete designation given to the radio frequencies from 6 000 to 8 000 MHz (equivalent to wavelengths between 5 and 3.75 cm) during the cold war period.

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HALCA

HALCA (Highly Advanced Laboratory for Communications and Astronomy), also known for its project name VSOP (VLBI Space Observatory Programme), or the code name MUSES-B (for the second of the Mu Space Engineering Spacecraft series), is a Japanese 8 meter diameter radio telescope satellite which was used for Very Long Baseline Interferometry (VLBI).

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Hallicrafters SX-28

The Hallicrafters SX-28 "Super Skyrider" was an American shortwave communications receiver produced between 1940 and 1946 that saw wide use by amateur radio, government and military services.

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Hawthorne–Feather Airpark

Hawthorne–Feather Airpark is a privately owned public-use airport located three nautical miles (6 km) south of the central business district of Hillsborough, in Hillsborough County, New Hampshire, United States.

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HCT Co., Ltd.

HCT Co., Ltd. is a compliance testing and equipment calibration company which also develops particle counters and antennas located in South Korea.

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HDBaseT

HDBaseT, promoted and advanced by the HDBaseT Alliance, is a consumer electronic (CE) and commercial connectivity standard for transmission of uncompressed high-definition video (HD), audio, power, home networking, Ethernet, USB, and some control signals, over a common category cable (Cat5e or above) using the same 8P8C modular connectors used by Ethernet.

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Headset (audio)

A headset combines a headphone with a microphone.

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Hecto-

Hecto- (symbol: h) is a decimal unit prefix in the metric system denoting a factor of one hundred.

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Height above ground level

In aviation, atmospheric sciences and broadcasting, a height above ground level (AGL) is a height measured with respect to the underlying ground surface.

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Helicon double-layer thruster

The helicon double-layer thruster is a prototype spacecraft propulsion engine.

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Herbert S. Gutowsky

Herbert Sander Gutowsky (November 8, 1919 – January 13, 2000) was an American chemist who was a Professor of Chemistry at the University of Illinois at Urbana-Champaign.

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Heterodyne

Heterodyning is a signal processing technique invented in 1901 by Canadian inventor-engineer Reginald Fessenden that creates new frequencies by combining or mixing two frequencies.

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HFSS

HFSS is a commercial finite element method solver for electromagnetic structures from Ansys.

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High frequency

High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz).

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High Frequency Active Auroral Research Program

The High Frequency Active Auroral Research Program (HAARP) was initiated as an ionospheric research program jointly funded by the U.S. Air Force, the U.S. Navy, the University of Alaska Fairbanks, and the Defense Advanced Research Projects Agency (DARPA).

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High-altitude nuclear explosion

High-altitude nuclear explosions are the result of nuclear weapons testing.

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High-intensity radiated field

A high-intensity radiated field (HIRF) is radio-frequency energy of a strength sufficient to adversely affect either a living organism or the performance of a device subjected to it.

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High-pass filter

A high-pass filter (HPF) is an electronic filter that passes signals with a frequency higher than a certain cutoff frequency and attenuates signals with frequencies lower than the cutoff frequency.

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History of gamma-ray burst research

The history of gamma-ray began with the serendipitous detection of a gamma-ray burst (GRB) on July 2, 1967, by the U.S. Vela satellites.

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History of metamaterials

The history of metamaterials begins with artificial dielectrics in microwave engineering as it developed just after World War II.

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History of the Tesla coil

Nikola Tesla patented the Tesla coil circuit on April 25, 1891.

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History of the transistor

A transistor is a semiconductor device with at least three terminals for connection to an electric circuit.

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Home automation

Home automation or domotics is building automation for a home, called a smart home or smart house.

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HomeLink Wireless Control System

The HomeLink Wireless Control System is a radio frequency (RF) transmitter integrated into some automobiles that can be programmed to activate devices such as garage door openers, RF-controlled lighting, gates and locks, including those with rolling codes.

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HomeRF

HomeRF was a wireless networking specification for home devices.

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HT (vacuum tube)

In vacuum tube technology, HT or high tension describes the main power supply to the circuit, which produces the current between anode and cathode.

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Hulse–Taylor binary

PSR B1913+16 (also known as PSR J1915+1606, PSR 1913+16, and the Hulse–Taylor binary after its discoverers) is a pulsar (a radiating neutron star) which together with another neutron star is in orbit around a common center of mass, thus forming a binary star system.

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Humavox

Humavox Ltd. is an Israeli startup that develops a Radio Frequency (RF) based wireless charging technology for wearables, hearables, IoT, enterprise, consumer electronics and healthcare devices, including hearing aids.

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Hybrid fibre-coaxial

Hybrid fiber-coaxial (HFC) is a telecommunications industry term for a broadband network that combines optical fiber and coaxial cable.

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Hybrid mass spectrometer

A hybrid mass spectrometer is a device for tandem mass spectrometry that consists of a combination of two or more m/z separation devices of different types.

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I band (NATO)

The NATO I band is the obsolete designation given to the radio frequencies from 8 000 to 10 000 MHz (equivalent to wavelengths between 3.75 and 3 cm) during the Cold War period.

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IAI Harpy NG

The IAI Harpy NG or IAI Harpy New Generation is an loitering munition produced by the Israel Aerospace Industries.

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IDEN

Integrated Digital Enhanced Network (iDEN) is a mobile telecommunications technology, developed by Motorola, which provides its users the benefits of a trunked radio and a cellular telephone.

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IEEE 802.11

IEEE 802.11 is a set of media access control (MAC) and physical layer (PHY) specifications for implementing wireless local area network (WLAN) computer communication in the 900 MHz and 2.4, 3.6, 5, and 60 GHz frequency bands.

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IEEE 802.15.4

IEEE 802.15.4 is a technical standard which defines the operation of low-rate wireless personal area networks (LR-WPANs).

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IEEE 802.20

IEEE 802.20 or Mobile Broadband Wireless Access (MBWA) was a specification by the standard association of the Institute of Electrical and Electronics Engineers (IEEE) for mobile wireless Internet access networks.

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IEEE MTT-S International Microwave Symposium

The IEEE/MTT-S International Microwave Symposium (IMS) is an annual technical professional conference specializing in RF/Microwave theory and applications that is a combination of multiple technical conferences and a commercial exhibition.

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Image response

Image response (or more correctly, image response rejection ratio, or IMRR) is a measure of performance of a radio receiver that operates on the super-heterodyne principle.

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IMEC

Imec is an international R&D and innovation hub, active in the fields of nanoelectronics and digital technologies.

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Impedance bridging

In electronics, especially audio and sound recording, a high impedance bridging, voltage bridging, or simply bridging connection is one in which the load impedance is much larger than the source impedance.

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In situ

In situ (often not italicized in English) is a Latin phrase that translates literally to "on site" or "in position".

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In-band on-channel

In-band on-channel (IBOC) is a hybrid method of transmitting digital radio and analog radio broadcast signals simultaneously on the same frequency.

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In-Building Cellular Enhancement System

An in-building cellular enhancement system, commonly implemented in conjunction with a distributed antenna system (DAS), is a telecommunications solution which is used to extend and distribute the cellular signal of a given mobile network operator (hereafter abbreviated as an MNO) within a building.

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IND Culver Line

The IND Culver Line (formerly BMT Culver Line) is a rapid transit line of the B Division of the New York City Subway, extending from Downtown Brooklyn south to Coney Island, Brooklyn, New York City, United States.

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Index of electrical engineering articles

This is an alphabetical list of articles pertaining specifically to electrical and electronics engineering.

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Index of electronics articles

This is an index of articles relating to electronics and electricity or natural electricity and things that run on electricity and things that use or conduct electricity.

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Index of physics articles (R)

The index of physics articles is split into multiple pages due to its size.

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Index of radiation articles

* absorbed dose.

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Index of radio propagation articles

This is an index to articles about terms used in discussion of radio propagation.

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Induction welding

Induction welding is a form of welding that uses electromagnetic induction to heat the workpiece.

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Inductive output tube

The inductive output tube (IOT) or klystrode is a variety of linear-beam vacuum tube, similar to a klystron, used as a power amplifier for high frequency radio waves.

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Inductively coupled plasma atomic emission spectroscopy

Inductively coupled plasma atomic emission spectroscopy (ICP-AES), also referred to as inductively coupled plasma optical emission spectrometry (ICP-OES), is an analytical technique used for the detection of chemical elements.

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Inductively coupled plasma mass spectrometry

Inductively coupled plasma mass spectrometry (ICP-MS) is a type of mass spectrometry which is capable of detecting metals and several non-metals at concentrations as low as one part in 1015 (part per quadrillion, ppq) on non-interfered low-background isotopes.

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Inductor

An inductor, also called a coil, choke or reactor, is a passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through it.

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Inflation (cosmology)

In physical cosmology, cosmic inflation, cosmological inflation, or just inflation, is a theory of exponential expansion of space in the early universe.

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Injection locking

Injection locking and injection pulling are the frequency effects that can occur when a harmonic oscillator is disturbed by a second oscillator operating at a nearby frequency.

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Innocence + Experience Tour

The Innocence + Experience Tour (styled as iNNOCENCE + eXPERIENCE Tour) was a worldwide concert tour by rock band U2.

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Insteon

Insteon is a home automation (domotics) technology that enables light switches, lights, thermostats, leak sensors, remote controls, motion sensors, and other electrically powered devices to interoperate through power lines, radio frequency (RF) communications, or both.

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Insteon (company)

Insteon is an Irvine, CA-based developer of home automation (aka domotics) hardware and software.

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Insulator (electricity)

An electrical insulator is a material whose internal electric charges do not flow freely; very little electric current will flow through it under the influence of an electric field.

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Insulin pump

An insulin pump is a medical device used for the administration of insulin in the treatment of diabetes mellitus, also known as continuous subcutaneous insulin therapy.

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Integrated circuit design

Integrated circuit design, or IC design, is a subset of electronics engineering, encompassing the particular logic and circuit design techniques required to design integrated circuits, or ICs.

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Intel Mobile Communications

Intel Mobile Communications (IMC), is the mobile research and development division of Intel.

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Intensity modulation

In optical communications, intensity modulation (IM) is a form of modulation in which the optical power output of a source is varied in accordance with some characteristic of the modulating signal.

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Interactive Scenario Builder

Interactive Scenario Builder (Builder) is a modeling and simulation, three-dimensional application developed by the Advanced Tactical Environmental Simulation Team (ATEST) at the Naval Research Laboratory (NRL) that aids in understanding the radio frequency (RF) environment.

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Intercarrier method

The intercarrier method is a system in television that reduces the cost of transmitters and receiver sets by processing audio and video signals together and minimizing the number of separate stages for audio and video signals.

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Interferometry

Interferometry is a family of techniques in which waves, usually electromagnetic waves, are superimposed causing the phenomenon of interference in order to extract information.

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Intermediate frequency

In communications and electronic engineering, an intermediate frequency (IF) is a frequency to which a carrier wave is shifted as an intermediate step in transmission or reception.

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Intermediate power amplifier

An Intermediate power amplifier (IPA) is one stage of the amplification process in a radio transmitter which usually occurs prior to the final high power amplification.

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Intermodulation

Intermodulation (IM) or intermodulation distortion (IMD) is the amplitude modulation of signals containing two or more different frequencies, caused by nonlinearities in a system.

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Internet 0

Internet 0 is a low-speed physical layer designed to route 'IP over anything.' It was developed at MIT's Center for Bits and Atoms by Neil Gershenfeld, Raffi Krikorian, and Danny Cohen.

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Interventional magnetic resonance imaging

Interventional magnetic resonance imaging, also Interventional MRI or IMRI, is the use of magnetic resonance imaging (MRI) to do interventional radiology procedures.

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Inverse synthetic-aperture radar

Inverse synthetic aperture radar (ISAR) is a radar technique using Radar imaging to generate a two-dimensional high resolution image of a target.

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Inverted-F antenna

An inverted-F antenna is a type of antenna used in wireless communication.

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Invisibility

Invisibility is the state of an object that cannot be seen.

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Ion funnel

in mass spectrometry, an ion funnel is a device used to focus a beam of ions using a series of stacked ring electrodes with decreasing inner diameter.

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Ion thruster

An ion thruster or ion drive is a form of electric propulsion used for spacecraft propulsion.

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Ion trap

An ion trap is a combination of electric or magnetic fields used to capture charged particles, often in a system isolated from an external environment.

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Ion-mobility spectrometry–mass spectrometry

Ion-mobility spectrometry–mass spectrometry (IMS-MS), also known as ion-mobility separation–mass spectrometry, is an analytical chemistry method that separates gas phase ions on a millisecond timescale using ion-mobility spectrometry and uses mass spectrometry on a microsecond timescale to identify components in a sample.

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Ionospheric absorption

Ionospheric absorption (or ISAB) is the scientific name for absorption occurring as a result of the interaction between various types of electromagnetic waves and the free electrons in the ionosphere, which can interfere with radio transmissions.

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IQ imbalance

IQ imbalance is a performance-limiting issue in the design of direct conversion receivers, also known as zero intermediate frequency (IF) or homodyne receivers.

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IQRF

IQRF is a technology for wireless packet-oriented communication via radio frequency (RF) in sub-GHz ISM bands.

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ISM applications

Industrial, scientific and medical (ISM) applications (of radio frequency energy) (short: ISM applications) are – according to article 1.15 of the International Telecommunication Union´s (ITU) ITU Radio Regulations (RR) – defined as «Operation of equipment or appliances designed to generate and use locally radio frequency energy for industrial, scientific, medical, domestic or similar purposes, excluding applications in the field of telecommunications.».

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ISM band

The industrial, scientific and medical (ISM) radio bands are radio bands (portions of the radio spectrum) reserved internationally for the use of radio frequency (RF) energy for industrial, scientific and medical purposes other than telecommunications.

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ISmartAlarm

iSmartAlarm is a do-it-yourself (DIY) smart home security system controlled with a user’s smartphone.

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Isolator (microwave)

An isolator is a two-port device that transmits microwave or radio frequency power in one direction only.

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ITER

ITER (Latin for "the way") is an international nuclear fusion research and engineering megaproject, which will be the world's largest magnetic confinement plasma physics experiment.

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ITU Radio Regulations

The ITU Radio Regulations (short: RR) regulates on law of nations scale radiocommunication services and the utilisation of radio frequencies.

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ITU-R

The ITU Radiocommunication Sector (ITU-R) is one of the three sectors (divisions or units) of the International Telecommunication Union (ITU) and is responsible for radio communication.

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IWireless

Iowa Wireless Services LLC, doing business as iWireless, is a mobile network operator founded in 1997, not related to Kroger's service.

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IXYS Corporation

IXYS Corporation, (NASDAQ) is an American company based in Milpitas, California.

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Π pad

The Π pad (pi pad) is a specific type of attenuator circuit in electronics whereby the topology of the circuit is formed in the shape of the Greek letter "Π".

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J band (NATO)

The NATO J band is the obsolete designation given to the radio frequencies from 10 to 20 GHz (equivalent to wavelengths between 3 and 1.5 cm) during the cold war period.

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J-coupling

In nuclear chemistry and nuclear physics, Scalar or J-couplings (also called indirect dipole–dipole coupling) are mediated through chemical bonds connecting two spins.

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Janel Leppin

Janel Leppin (born 1981) is an American cellist and multi-instrumentalist.

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Jatayu Conservation Breeding Centre, Pinjore

The Jatayu Conservation Breeding Centre, Pinjore (JCBC), (Hindi: जटायु संरक्षण एवं प्रजनन केँद्र) is world's largest facility within Bir Shikargah Wildlife Sanctuary for the breeding and conservation of Indian vultures (गिध) in the State of Haryana, India, in Panchkula district in the town of Pinjore.

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Jean Jeener

Jean Louis Charles Jeener is a Belgian physical chemist and physicist, well known for his experimental and theoretical contributions to spin thermodynamics in solids and for his invention of Two-dimensional nuclear magnetic resonance spectroscopy.

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Joe Wiseman Howland

Joe Wiseman Howland, M.D., Ph.D. (21 December 1908 – 12 October 1978) a pioneer researcher in radiation toxicity, health and safety.

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John Kanzius

John S. Kanzius (March 1, 1944 – February 18, 2009) was an American inventor, radio and TV engineer, one-time station owner and ham radio operator (Call Sign K3TUP) from Erie, Pennsylvania.

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Judith C. Waller

Judith Cary Waller (February 19, 1889 – October 28, 1973) was a broadcasting pioneer.

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Jump wire

A jump wire (also known as jumper, jumper wire, jumper cable, DuPont wire, or DuPont cable – named for one manufacturer of them) is an electrical wire, or group of them in a cable, with a connector or pin at each end (or sometimes without them – simply "tinned"), which is normally used to interconnect the components of a breadboard or other prototype or test circuit, internally or with other equipment or components, without soldering.

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Justin Jacobs

Justin Jacobs is a United States statistician, currently serving as the Senior Basketball Researcher with the Orlando Magic.

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K band (NATO)

The NATO K band is the obsolete designation given to the radio frequencies from 20 to 40 GHz (equivalent to wavelengths between 1.5 and 0.75 cm) during the cold war period.

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KALX

KALX (90.7 FM) is an FM radio station that broadcasts from the University of California, Berkeley in Berkeley, California, United States.

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Karakalpakstan

Karakalpakstan (Qaraqalpaqstan / Қарақалпақстан), officially the Republic of Karakalpakstan (Qaraqalpaqstan Respublikası / Қарақалпақстан Республикасы) is an autonomous republic within Uzbekistan.

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Keychain

A keychain, or keyring, is a small chain, usually made from metal or plastic, that connects a small item to a keyring.

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KFWB

KFWB (980 kHz) is a commercial AM radio station in Los Angeles, California.

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KIC 8462852

KIC 8462852 (also Tabby's Star or Boyajian's Star) is an F-type main-sequence star located in the constellation Cygnus approximately from Earth.

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Kilpatrick limit

In particle accelerators, a common mechanism for accelerating a charged particle beam is via copper resonant cavities in which electric and magnetic fields form a standing wave, the mode of which is designed so that the E field points along the axis of the accelerator, producing forward acceleration of the particles when in the correct phase.

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Kinetic inductance

Kinetic inductance is the manifestation of the inertial mass of mobile charge carriers in alternating electric fields as an equivalent series inductance.

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KJZY

KJZY is a radio station licensed to Sebastopol, California, with a frequency of 99.1 MHz.

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KKOL (AM)

KKOL AM 1300 is a radio station located in Seattle, Washington.

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KLCH

KLCH is located in Lake City, Minnesota.

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KLVM (FM)

KLVM (88.9 FM) is a radio station broadcasting a Contemporary Christian music format.

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Klystron

A klystron is a specialized linear-beam vacuum tube, invented in 1937 by American electrical engineers Russell and Sigurd Varian,Pond, Norman H. "The Tube Guys".

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KNX (standard)

KNX is a standardised (EN 50090, ISO/IEC 14543), OSI-based network communications protocol for building automation.

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Kolchuga passive sensor

The Kolchuga (Кольчуга Chainmail) passive sensor is an ESM system developed in the Soviet Union and manufactured in Ukraine.

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Kon-Tiki expedition

The Kon-Tiki expedition was a 1947 journey by raft across the Pacific Ocean from South America to the Polynesian islands, led by Norwegian explorer and writer Thor Heyerdahl.

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Kotcherlakota Rangadhama Rao

Prof.

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KPFW-LD

KPFW-LD is a television station affiliated with America's Auction Network in Dallas, owned by DTV America Corporation.

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KQLZ (defunct)

KQLZ (100.3 FM, "Pirate Radio") was an FM radio station in Los Angeles, California, United States that broadcast from March 17, 1989 to April 2, 1993.

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KRLX

KRLX is a student-run, freeform radio format, non-commercial FM campus radio station broadcasting from Northfield, Minnesota.

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KSLG-FM

KSLG is a commercial Independent music and Alternative radio station in Ferndale, California, broadcasting to the Eureka, California, area on 93.1 FM.

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KSTAR

The KSTAR, or Korea '''S'''uperconducting '''T'''okamak Advanced Research is a magnetic fusion device being built at the National Fusion Research Institute in Daejeon, South Korea.

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KZST

KZST is a radio station based and licensed in Santa Rosa, California, with a frequency of 100.1 MHz.

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L band (NATO)

The NATO L band is the obsolete designation given to the radio frequencies from 40 to 60 GHz (equivalent to wavelengths between 7.5 and 5 mm) during the cold war period.

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L-Tronics

L-Tronics is a company based in Santa Barbara, California that specializes in the design and manufacture of direction finding (DF) equipment for search and rescue applications, used to locate signals originating from emergency locator beacons.

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LADEE

The Lunar Atmosphere and Dust Environment Explorer (LADEE) was a NASA lunar exploration and technology demonstration mission.

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Langmuir probe

A Langmuir probe is a device used to determine the electron temperature, electron density, and electric potential of a plasma.

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Laplace transform

In mathematics, the Laplace transform is an integral transform named after its discoverer Pierre-Simon Laplace.

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Laser

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.

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Laser pumping

Laser pumping is the act of energy transfer from an external source into the gain medium of a laser.

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Last mile

The last mile or last kilometer is a colloquial phrase widely used in the telecommunications, cable television and internet industries to refer to the final leg of the telecommunications networks that deliver telecommunication services to retail end-users (customers).

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Lastikman

Lastikman originally spelled Lastik Man is a fictional character and Filipino comics superhero created by Mars Ravelo and artist Mar T. Santana.

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Lawrence Lessig

Lester Lawrence "Larry" Lessig III (born June 3, 1961) is an American academic, attorney, and political activist.

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Lead (electronics)

In electronics, a lead is an electrical connection consisting of a length of wire or a metal pad (SMD) that is designed to connect two locations electrically.

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Lecher lines

In electronics, a Lecher line or Lecher wires is a pair of parallel wires or rods that were used to measure the wavelength of radio waves, mainly at UHF and microwave frequencies.

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Lego Mindstorms

Lego Mindstorms is a hardware software platform produced by Lego for the development of programmable robots based on Lego building blocks.

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Levitated dipole

A levitated dipole is a type of nuclear fusion reactor design using a superconducting torus which is magnetically levitated inside the reactor chamber.

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Li-Fi

Li-Fi (short for light fidelity) is a technology for wireless communication between devices using light to transmit data and position.

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Lightning detection

A lightning detector is a device that detects lightning produced by thunderstorms.

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Line Impedance Stabilization Network

A line impedance stabilization network (LISN) is a device used in conducted and radiated radio-frequency emission and susceptibility tests, as specified in various electromagnetic compatibility (EMC)/EMI test standards (e.g., by CISPR, International Electrotechnical Commission, CENELEC, U.S. Federal Communications Commission, MIL-STD) An LISN is a low-pass filter typically placed between an AC or DC power source and the EUT (equipment under test) to create a known impedance and to provide a radio frequency (RF) noise measurement port.

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Linear amplifier

A linear amplifier is an electronic circuit whose output is proportional to its input, but capable of delivering more power into a load.

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Linear particle accelerator

A linear particle accelerator (often shortened to linac) is a type of particle accelerator that accelerates charged subatomic particles or ions to a high speed by subjecting them to a series of oscillating electric potentials along a linear beamline.

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Linear Technology

Linear Technology Corporation designs, manufactures and markets a broad line of standard high performance analog integrated circuits.

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Lipolysis

Lipolysis is the breakdown of lipids and involves hydrolysis of triglycerides into glycerol and free fatty acids.

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List of amateur radio frequency bands in India

Amateur radio or ham radio is a hobby that is practised by over 16,000 licensed users in India.

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List of Amkette products

This is a list of various Amkette products.

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List of battery sizes

This article lists the sizes, shapes, and general characteristics of some common primary and secondary battery types in household and light industrial use.

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List of computing and IT abbreviations

This is a list of computing and IT acronyms and abbreviations.

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List of cycles

This is a list of recurring cycles.

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List of energy abbreviations

This is a list of acronyms found in the context of energy issues.

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List of former NTA Film Network affiliates in the United States

Between July 1956 to around November 1961, the National Telefilm Associates (NTA) operated the NTA Film Network, an early television network and syndication service that operated in the United States and Canada.

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List of Hatzolah chapters

This is a list of Hatzolah chapters.

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List of medical roots, suffixes and prefixes

This is a list of roots, suffixes, and prefixes used in medical terminology, their meanings, and their etymology.

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List of prolific inventors

Thomas Alva Edison was widely known as the America's most prolific inventor, even after his death in 1931.

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List of Puerto Rican scientists and inventors

Before Christopher Columbus and the Spanish Conquistadors landed on the island of "Borikén" (Puerto Rico), the Tainos who inhabited the island depended on their astronomical observations for the cultivation of their crops.

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List of television stations in Washington (state)

This is a list of broadcast television stations serving cities in the U.S. state of Washington.

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List of U.S. Air Force acronyms and expressions

This is a list of initials, acronyms, expressions, euphemisms, jargon, military slang, and sayings in common or formerly common use in the United States Air Force.

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List of vacuum tubes

This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes.

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List of video connectors

This is a list of physical RF and video connectors and related video signal standards.

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Litz wire

Litz wire is a type of specialized multistrand wire or cable used in electronics to carry alternating current (AC) at radio frequencies.

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Liz Phillips

Liz Phillips (born 1951) is an American artist specializing in sound art and interactive art.

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Load management

Load management, also known as demand side management (DSM), is the process of balancing the supply of electricity on the network with the electrical load by adjusting or controlling the load rather than the power station output.

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Lockheed Martin F-35 Lightning II

The Lockheed Martin F-35 Lightning II is a family of single-seat, single-engine, all-weather stealth multirole fighters.

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Logitech Harmony

Logitech Harmony is a line of remote controls and home automation products produced by Logitech.

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LoJack

The LoJack Stolen Vehicle Recovery System is an aftermarket vehicle tracking system that allows vehicles to be tracked by police, with the aim of recovering them in case of theft.

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LonTalk

LonTalk is a protocol optimized for control.

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LonWorks

LonWorks (local operating network) is a networking platform specifically created to address the needs of control applications.

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LoRa

LoRa is a patented digital wireless data communication IoT technology developed by Cycleo of Grenoble, France, and acquired by Semtech in 2012.

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Loudspeaker

A loudspeaker (or loud-speaker or speaker) is an electroacoustic transducer; which converts an electrical audio signal into a corresponding sound.

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Louisville Metro Police Department

The Louisville Metro Police Department (LMPD) began operations on January 6, 2003, as part of the creation of the consolidated city-county government in Louisville, Kentucky, United States.

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Love egg

A love egg is a type of sensual vibrator that is egg or bullet shaped that is used for stimulation.

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Low frequency

Low frequency (low freq) or LF is the ITU designation for radio frequencies (RF) in the range of 30 kilohertz (kHz)–300 kHz.

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Low IF receiver

In a low-IF receiver, the RF signal is mixed down to a non-zero low or moderate intermediate frequency, typically a few megahertz (for TV), and even lower frequencies (typically 120-130kHz) in the case of FM radio band receivers.

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Low-noise block downconverter

A low-noise block downconverter (LNB) is the receiving device mounted on satellite dishes used for satellite TV reception, which collects the radio waves from the dish and converts them to a signal which is sent through a cable to the receiver inside the building.

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LowFER

LowFER (Low-Frequency Experimental Radio) refers to experimental radio communication practiced by hobbyists on frequencies below 300 kHz, a part of the radio spectrum known as low frequency.

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LTspice

LTspice is freewareMike Engelhardt: LTspice IV Help → F.A.Q. → License and Distribution. (Help of software version 4.19u of 4 September 2013)Mike Engelhardt: LTspice IV Help → Introduction → License Agreement/Disclaimer. (Help of software version 4.19u of 4 September 2013) computer software implementing a SPICE simulator of electronic circuits, produced by semiconductor manufacturer Linear Technology (LTC), now part of Analog Devices.

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Lunar IceCube

Lunar IceCube is a planned NASA nanosatellite mission to prospect, locate, and estimate size and composition of water ice deposits on the Moon for future exploitation by robots or humans.

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M band (NATO)

The NATO M band is the obsolete designation given to the radio frequencies from 60 to 100 GHz (equivalent to wavelengths between 5 and 3 mm) during the cold war period.

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MACOM Technology Solutions

MACOM Technology Solutions is a developer and producer of radio, microwave, and millimeter wave semiconductor devices and components.

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Magnetic core

A magnetic core is a piece of magnetic material with a high magnetic permeability used to confine and guide magnetic fields in electrical, electromechanical and magnetic devices such as electromagnets, transformers, electric motors, generators, inductors, magnetic recording heads, and magnetic assemblies.

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Magnetic detector

The magnetic detector or Marconi magnetic detector, sometimes called the "Maggie", was an early radio wave detector used in some of the first radio receivers to receive Morse code messages during the wireless telegraphy era around the turn of the 20th century.

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Magnetic levitation

Magnetic levitation, maglev, or magnetic suspension is a method by which an object is suspended with no support other than magnetic fields.

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Magnetic resonance (quantum mechanics)

Magnetic resonance is a phenomenon that affects a Magnetic dipole when placed in a uniform static magnetic field.

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Magnetic resonance imaging

Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes of the body in both health and disease.

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Magnetic resonance microscopy

Magnetic resonance microscopy (MRM, µMRI) is magnetic resonance imaging (MRI) at a microscopic level down to the scale of microns.

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Magnetoencephalography

Magnetoencephalography (MEG) is a functional neuroimaging technique for mapping brain activity by recording magnetic fields produced by electrical currents occurring naturally in the brain, using very sensitive magnetometers.

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Magnetohydrodynamic drive

A magnetohydrodynamic drive or MHD accelerator is a method for propelling vehicles using only electric and magnetic fields with no moving parts, accelerating an electrically conductive propellant (liquid or gas) with magnetohydrodynamics.

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Magnetosphere of Jupiter

The magnetosphere of Jupiter is the cavity created in the solar wind by the planet's magnetic field.

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Magnum (satellite)

Magnum was a class of SIGINT spy satellites reportedly operated by the National Reconnaissance Office for the United States Central Intelligence Agency.

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Malaysia Airlines Flight 370

Malaysia Airlines Flight 370 (MH370/MAS370) was a scheduled international passenger flight operated by Malaysia Airlines that disappeared on 8 March 2014 while flying from Kuala Lumpur International Airport, Malaysia, to its destination, Beijing Capital International Airport in China.

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Maritime Mobile Service Identity

A Maritime Mobile Service Identity (MMSI) is a series of nine digits which are sent in digital form over a radio frequency channel in order to uniquely identify ship stations, ship earth stations, coast stations, coast earth stations, and group calls.

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Mark IV Industries

Mark IV Industries, Inc., headquartered in Amherst, New York, is a leading manufacturer of automotive components.

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Mars Telecommunications Orbiter

The Mars Telecommunications Orbiter (MTO) was a cancelled Mars mission that was originally intended to launch in 2009 and would have established an Interplanetary Internet between Earth and Mars.

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Maser

A maser (an acronym for "microwave amplification by stimulated emission of radiation") is a device that produces coherent electromagnetic waves through amplification by stimulated emission.

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Mason's invariant

In electronics, Mason's invariant, named after Samuel Jefferson Mason, is a measure of the quality of transistors.

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Mass spectrometry

Mass spectrometry (MS) is an analytical technique that ionizes chemical species and sorts the ions based on their mass-to-charge ratio.

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Mast radiator

A mast radiator (or radiating tower) is a radio mast or tower in which the entire structure functions as an antenna.

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Mauritius Radio Telescope

The Mauritius Radio Telescope (MRT) is a synthesis radio telescope in Mauritius that is used to make images of the sky at a frequency of 151.5 MHz.

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MaxLinear

MaxLinear is an American hardware company.

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Measuring instrument

A measuring instrument is a device for measuring a physical quantity.

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Measuring receiver

In telecommunication, a measuring receiver or measurement receiver is a calibrated laboratory-grade radio receiver designed to measure the characteristics of radio signals.

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Mechanical filter

A mechanical filter is a signal processing filter usually used in place of an electronic filter at radio frequencies.

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Media in Alexandria, Minnesota

The following is a list of media in Alexandria, Minnesota.

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Media in Atlanta

As of 2011, metro Atlanta was the ninth-largest media market in the United States.

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Media in Columbus, Georgia

Below is a list of the media in the Columbus Metro Area in Columbus, Georgia.

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Media in Omaha, Nebraska

This is a list of media serving the Omaha metropolitan area in Omaha, Nebraska and Council Bluffs, Iowa.

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Medical imaging

Medical imaging is the technique and process of creating visual representations of the interior of a body for clinical analysis and medical intervention, as well as visual representation of the function of some organs or tissues (physiology).

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Medium frequency

Medium frequency (MF) is the ITU designation for radio frequencies (RF) in the range of 300 kilohertz (kHz) to 3 megahertz (MHz).

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Mega Kid MK-1000

The Mega Kid MK-1000 is a Nintendo Entertainment System hardware clone with a built-in Famicom BASIC compatible keyboard, marketed as an "educational computer".

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Melpar

Melpar was an American government contractor in the 20th century Cold War period.

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Mercury Systems

Mercury Systems, Inc.() is a defense contractor headquartered in Andover, Massachusetts.

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MESFET

MESFET stands for metal–semiconductor field-effect transistor.

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Mesh

A mesh is a barrier made of connected strands of metal, fiber, or other flexible or ductile materials.

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Metabolome

The metabolome refers to the complete set of small-molecule chemicals found within a biological sample.

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Metamaterial absorber

A metamaterial absorber is a type of metamaterial intended to efficiently absorb electromagnetic radiation such as light.

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Metamaterial antenna

Metamaterial antennas are a class of antennas which use metamaterials to increase performance of miniaturized (electrically small) antenna systems.

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Metamaterial cloaking

Metamaterial cloaking is the usage of metamaterials in an invisibility cloak.

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Microchip Technology

Microchip Technology is an American manufacturer of microcontroller, memory and analog semiconductors.

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Microcoil

A microcoil is a tiny electrical conductor such as a wire in the shape of a spiral or helix which could be a solenoid or a planar structure.

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Microelectromechanical system oscillator

Microelectromechanical system (MEMS) oscillators are timing devices that generate highly stable reference frequencies, which can measure time.

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Microheater

Microheaters are small high-power heaters, with precise control, that can offer temperatures in excess of 1000C, even up to 1900C.

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Microstrip antenna

In telecommunication, a microstrip antenna (also known as a printed antenna) usually means an antenna fabricated using microstrip techniques on a printed circuit board (PCB).

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Microwave and Optical Technology Letters

Microwave and Optical Technology Letters is a monthly peer-reviewed scientific journal published by Wiley-Blackwell.

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Microwave cavity

A microwave cavity or radio frequency (RF) cavity is a special type of resonator, consisting of a closed (or largely closed) metal structure that confines electromagnetic fields in the microwave region of the spectrum.

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Microwave Power Module

A Microwave Power Module (MPM) is a microwave device used to amplify radio frequency signals to high power levels.

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Microwave radiometer

A microwave radiometer (MWR) is a radiometer that measures energy emitted at millimetre-to-centimetre wavelengths (frequencies of 1–1000 GHz) known as microwaves.

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Millimeter wave scanner

A millimeter wave scanner is a whole-body imaging device used for detecting objects concealed underneath a person’s clothing using a form of electromagnetic radiation.

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MIM-104 Patriot

The MIM-104 Patriot is a surface-to-air missile (SAM) system, the primary of its kind used by the United States Army and several allied nations.

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Minimaze procedure

The mini-maze procedures are cardiac surgery procedures intended to cure atrial fibrillation (AF), a common disturbance of heart rhythm.

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Minimed Paradigm

MiniMed Paradigm is a series of insulin pumps manufactured by Medtronic for patients with diabetes mellitus.

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Minot, North Dakota

Minot is a city in and the county seat of Ward County, North Dakota, United States, in the state's north-central region.

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Misawa Air Base

is an air base of the Japan Air Self-Defense Force (JASDF) and the United States Air Force located in Misawa, Aomori, in the northern part of the island of Honshū of Japan.

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Mississauga Model flying club

The MMFC, or Mississauga Model Flying Club is a remote controlled airplane and helicopter flying club located in Mississauga, Ontario.

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Mobile phone

A mobile phone, known as a cell phone in North America, is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.

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Mobile phone features

The features of mobile phones are the set of capabilities, services and applications that they offer to their users.

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Mobile phone radiation and health

The effect of mobile phone radiation on human health is a subject of interest and study worldwide, as a result of the enormous increase in mobile phone usage throughout the world.

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Mobile phones on aircraft

In the U.S., Federal Communications Commission (FCC) regulations prohibit the use of mobile phones aboard aircraft in flight.

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Modulating retro-reflector

A modulating retro-reflector (MRR) system combines an optical retro-reflector and an optical modulator to allow optical communications and sometimes other functions such as programmable signage.

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Modulation

In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that typically contains information to be transmitted.

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Monolithic microwave integrated circuit

A Monolithic Microwave Integrated Circuit, or MMIC (sometimes pronounced "mimic"), is a type of integrated circuit (IC) device that operates at microwave frequencies (300 MHz to 300 GHz).

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Monopole antenna

A monopole antenna is a class of radio antenna consisting of a straight rod-shaped conductor, often mounted perpendicularly over some type of conductive surface, called a ground plane.

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Monte Ceneri transmitter

The Monte Ceneri transmitter was first established as the nationwide medium-wave radio transmission station for Italian-speaking Switzerland in 1933.

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Morcom International

Morcom International, Inc., branded as Morcom, is an American emergency communication systems and meteorological communication systems solutions provider and government contractor.

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Morse code

Morse code is a method of transmitting text information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment.

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MOSFET

MOSFET showing gate (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (white). surface-mount packages. Operating as switches, each of these components can sustain a blocking voltage of 120nbspvolts in the ''off'' state, and can conduct a continuous current of 30 amperes in the ''on'' state, dissipating up to about 100 watts and controlling a load of over 2000 watts. A matchstick is pictured for scale. A cross-section through an nMOSFET when the gate voltage ''V''GS is below the threshold for making a conductive channel; there is little or no conduction between the terminals drain and source; the switch is off. When the gate is more positive, it attracts electrons, inducing an ''n''-type conductive channel in the substrate below the oxide, which allows electrons to flow between the ''n''-doped terminals; the switch is on. Simulation result for formation of inversion channel (electron density) and attainment of threshold voltage (IV) in a nanowire MOSFET. Note that the threshold voltage for this device lies around 0.45 V The metal-oxide-semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET) is a type of field-effect transistor (FET), most commonly fabricated by the controlled oxidation of silicon.

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Motor–generator

A motor–generator (an M–G set) is a device for converting electrical power to another form.

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Motorboating (electronics)

In electronics, motorboating is a type of low frequency parasitic oscillation (unwanted cyclic variation of the output voltage) that sometimes occurs in audio and radio equipment and often manifests itself as a sound similar to an idling motorboat engine, a "put-put-put", in audio output from speakers or earphones.

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Motorola DCT3412

The Motorola DCT3412 is a digital-tuner only version of the Motorola DCT6412 HDTV DVR.

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Motorola Minitor

The Motorola Minitor is a portable, analog, receive only, voice pager typically carried by fire, rescue, and EMS personnel (both volunteer and career) to alert of emergencies.

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MPEG-2

MPEG-2 (a.k.a. H.222/H.262 as defined by the ITU) is a standard for "the generic coding of moving pictures and associated audio information".

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MRI contrast agent

MRI contrast agents are contrast agents used to improve the visibility of internal body structures in magnetic resonance imaging (MRI).

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MRI RF shielding

RF shielding for MRI rooms is necessary to prevent noise of radio frequency from entering into the MRI scanner and distorting the image.

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Mu-metal

Mu-metal is a nickel–iron soft ferromagnetic alloy with very high permeability, which is used for shielding sensitive electronic equipment against static or low-frequency magnetic fields.

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Mueller Systems

Mueller Systems is a manufacturer and distributor of advanced metering infrastructure (AMI) and automatic meter reading (AMR) technology, as well as residential, commercial and fire-line meters and related products.

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Multi-band device

In telecommunications, a multi-band device (including dual-band, tri-band, quad-band and penta-band devices) is a communication device (especially a mobile phone) that supports multiple radio frequency bands.

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Multi-frequency network

Data networks, such as wireless communication networks, have to trade off between services customized for a single terminal and services provided to a large number of terminals.

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Multi-mode wireless terminal

This goal is to realize a multi-mode terminal on vehicle that can download communication and application software by wireless and then can easily access new services without purchasing additional new equipment, even if services/communication system is modified or newly introduced.

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Multipactor effect

The multipactor effect is a phenomenon in radio frequency (RF) amplifier vacuum tubes and waveguides, where, under certain conditions, secondary electron emission in resonance with an alternating electric field leads to exponential electron multiplication, possibly damaging and even destroying the RF device.

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Multispectral optoacoustic tomography

Multi-spectral optoacoustic tomography (MSOT), also known as functional photoacoustic tomography (fPAT), is an imaging technology that generates high-resolution optical images in scattering media, including biological tissues.

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Muon spin spectroscopy

Muon spin spectroscopy is an experimental technique based on the implantation of spin-polarized muons in matter and on the detection of the influence of the atomic, molecular or crystalline surroundings on their spin motion.

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Mythology of Lost

The television show Lost includes a number of mysterious elements that have been ascribed to science fiction or supernatural phenomena, usually concerning coincidences, synchronicity, déjà vu, temporal and spatial anomalies, paradoxes, and other puzzling phenomena.

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N band (NATO)

The NATO N band is the designation given to the radio frequencies from 100 to 200 GHz (equivalent to wavelengths between 3 mm and 1.5 mm) used by US armed forces and SACLANT in ITU Region 2.

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Na effect

Na effect means the phenomenon as independent electro thermal tissue coagulation around each electrode of bipolar radio frequency.

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Nagy Habib

Nagy Habib (born 5 August 1952) is a Professor of Surgery based in London.

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Nanoelectromechanical relay

A nanoelectromechanical (NEM) relay is an electrically actuated switch that is built on the nanometer scale using semiconductor fabrication techniques.

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Napkin PC

The Napkin PC is a concept for a next-generation computer entered into the 2009 Next-Gen PC Design Competition by Avery Holleman.

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NASA facilities

NASA facilities not only exist across the United States, but also across the world.

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National Communications Commission

The National Communications Commission (NCC) is an independent statutory agency of Executive Yuan of the Republic of China responsible for regulating the development of the communications and information industry, promoting competition, consumer protection, licensing, radio frequency, spectrum, broadcasting, content regulation, communications standards and specifications in Taiwan.

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National Compact Stellarator Experiment

The National Compact Stellarator Experiment (NCSX) was a magnetic fusion energy experiment based on the stellarator design being constructed at the Princeton Plasma Physics Laboratory (PPPL).

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National Traffic System

The National Traffic System (NTS) is an organized network of amateur radio operators sponsored by the American Radio Relay League for the purpose of relaying messages throughout the U.S. and Canada.

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Near and far field

The near field and far field are regions of the electromagnetic field (EM) around an object, such as a transmitting antenna, or the result of radiation scattering off an object.

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Near-field communication

Near-field communication (NFC) is a set of communication protocols that enable two electronic devices, one of which is usually a portable device such as a smartphone, to establish communication by bringing them within 4 cm (1.6 in) of each other.

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Negative temperature

In physics, certain systems can achieve negative temperature; that is, their thermodynamic temperature can be expressed as a negative quantity on the Kelvin or Rankine scales.

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Networked flying platform

Networked flying platforms (NFPs) are unmanned flying platforms of various types including unmanned aerial vehicles (UAVs), drones, tethered balloon and high-altitude/medium-altitude/low-altitude platforms (HAPs/MAPs/LAPs) carrying RF/mmWave/FSO payload (transceivers) along with an extended battery life capabilities, and are floating or moving in the air at a quasi-stationary positions with the ability to move horizontally and vertically to offer 5G and beyond 5G (B5G) cellular networks and network support services.

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Neumann U47

The U 47 was a large-diaphragm condenser microphone manufactured by Georg Neumann GmbH during the years 1949-1965.

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Neural dust

Neural dust, or neural dust mote is a term used to refer to millimeter-sized devices operated as wirelessly powered nerve sensors.

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NeuRFon

The neuRFon project (named for a combination of "neuron" and "RF") was a research program begun in 1999 at Motorola Labs to develop ad hoc wireless networking for wireless sensor network applications.

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Neurostimulation

Neurostimulation is the purposeful modulation of the nervous system's activity using invasive (e.g. microelectrodes) or non-invasive means (e.g. transcranial magnetic stimulation or transcranial electric stimulation, tES, such as tDCS or transcranial alternating current stimulation, tACS).

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Neutral beam injection

Neutral beam injection (NBI) is one method used to heat plasma inside a fusion device consisting in a beam of high-energy neutral particles that can enter the magnetic confinement field.

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New York City Subway

The New York City Subway is a rapid transit system owned by the City of New York and leased to the New York City Transit Authority, a subsidiary agency of the state-run Metropolitan Transportation Authority (MTA).

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Next Generation Data Communications

Next Generation (NextGen) Data Communications (Nexcom or DataComm), an element of the Next Generation Air Transportation System, will significantly reduce controller-to-pilot communications and controller workload, whilst improving safety.

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NGC 3256

NGC 3256 is a galaxy formed from the collision of two separate galaxies in the constellation of Vela.

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Nicolas Wöhrl

Nicolas Wöhrl (born 25 April 1974 in Recklinghausen) is a German physicist, science communicator and podcaster.

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Nike-X

Nike-X was an anti-ballistic missile (ABM) system designed in the 1960s by the United States Army to protect major cities in the United States from attacks by the Soviet Union's intercontinental ballistic missile (ICBM) fleet during the Cold War.

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Nira Dynamics AB

NIRA Dynamics AB is a Swedish company focusing on research and development of signal processing and control systems for the automotive industry.

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NJFA

NJFA stands for NATO Joint Civil/Military Frequency Agreement and is the universal NATO common civil/military treaty to regulate the military access to the radio frequency spectrum in the range of 14 kHz to 100 GHz in peacetime, during exercises, in times of crisis, and in military operations.

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No. 1 Radio School RAF

No.

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NodeB

Node B is the telecommunications node in particular mobile communication networks, namely those that adhere to the UMTS standard.

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Nokia 3510

The Nokia 3510 is an entry-level mobile phone for the GSM network, introduced by Nokia in 2002.

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Nominal impedance

Nominal impedance in electrical engineering and audio engineering refers to the approximate designed impedance of an electrical circuit or device.

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Nominal power (radio broadcasting)

Nominal power is a measurement of a mediumwave radio station's output used in the United States.

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Non-contact wafer testing

Wafer testing is a normal step in semiconductor device fabrication, used to detect defects in integrated circuits (IC) before they are assembled during the IC packaging step.

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Non-surgical liposuction

Non-surgical liposuction techniques use laser energy, radiofrequency, ultrasound or cold (cryolipolysis) to reduce fat.

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Nonlinear junction detector

The non-linear junction detector, or an NLJD, is a device that illuminates a small region of space with high-frequency RF energy.

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North American television frequencies

North American television frequencies are different for over-the-air (also called terrestrial) and cable television systems.

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Norwegian Institute of Technology

The Norwegian Institute of Technology, known by its Norwegian abbreviation NTH (Norges tekniske høgskole) was a science institute in Trondheim, Norway.

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NSA ANT catalog

The NSA ANT catalog is a 50-page classified document listing technology available to the United States National Security Agency (NSA) Tailored Access Operations (TAO) by the Advanced Network Technology (ANT) Division to aid in cyber surveillance.

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NSA Playset

The NSA Playset is an open source project, which was inspired by the NSA ANT catalog, to create more accessible and easy to use tools for security researchers.

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Nuclear magnetic resonance

Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a magnetic field absorb and re-emit electromagnetic radiation.

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Nuclear magnetic resonance decoupling

Nuclear magnetic resonance decoupling (NMR decoupling for short) is a special method used in nuclear magnetic resonance (NMR) spectroscopy where a sample to be analyzed is irradiated at a certain frequency or frequency range to eliminate fully or partially the effect of coupling between certain nuclei.

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Nuclear magnetic resonance quantum computer

Nuclear Magnetic Resonance (NMR) quantum computing is one of the several proposed approaches for constructing a quantum computer, that uses the spin states of nuclei within molecules as qubits.

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Nuclear magnetic resonance spectroscopy of proteins

Nuclear magnetic resonance spectroscopy of proteins (usually abbreviated protein NMR) is a field of structural biology in which NMR spectroscopy is used to obtain information about the structure and dynamics of proteins, and also nucleic acids, and their complexes.

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Nuremberg U-Bahn

The Nuremberg U-Bahn is a metro run by Verkehrs-Aktiengesellschaft Nürnberg (or Nuremberg Transport Corporation), which itself is a member of the VGN (Verkehrsverbund Großraum Nürnberg or Greater Nuremberg Transport Network).

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NXP Semiconductors

NXP Semiconductors N.V. is a Dutch global semiconductor manufacturer headquartered in Eindhoven, Netherlands.

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Nyquist filter

A Nyquist filter is an electronic filter used in TV receivers to equalize the video characteristics.

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Observations and explorations of Venus

Observations of the planet Venus include those in antiquity, telescopic observations, and from visiting spacecraft.

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Observatory

An observatory is a location used for observing terrestrial or celestial events.

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Obstructive sleep apnea

Obstructive sleep apnea (OSA) is the most common type of sleep apnea and is caused by complete or partial obstructions of the upper airway.

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On-board data handling

The on-board data handling (OBDH) subsystem of a spacecraft is the subsystem which carries and stores data between the various electronics units and the ground segment, via the telemetry, tracking and command (TT&C) subsystem.

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On-off keying

On-off keying (OOK) denotes the simplest form of amplitude-shift keying (ASK) modulation that represents digital data at the presence or absence of a carrier wave.

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OneWeb satellite constellation

The OneWeb satellite constellation—formerly known as WorldVu—is a proposed satellite internet constellation of approximately 882 satellites expected to provide global Internet broadband service to individual consumers as early as 2019.

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OPALS

Optical PAyload for Lasercomm Science (OPALS) is a spacecraft communication instrument developed at the Jet Propulsion Laboratory that was tested on the International Space Station (ISS) from 18 April 2014 to 17 July 2014 to demonstrate the technology for laser communications systems between spacecraft and ground stations.

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Open Base Station Architecture Initiative

The Open Base Station Architecture Initiative (OBSAI) was a trade association created by Hyundai, LG Electronics, Nokia, Samsung and ZTE in September 2002 with the aim of creating an open market for cellular network base stations.

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Open spectrum

Open spectrum (also known as free spectrum) is a movement to get the Federal Communications Commission to provide more unlicensed radio-frequency spectrum that is available for use by all.

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OpenTag

OpenTag is a DASH7 protocol stack and minimal Real-Time Operating System (RTOS), written in the C programming language.

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Operation RAFTER

RAFTER was a code name for the MI5 radio receiver detection technique, mostly used against clandestine Soviet agents and monitoring of domestic radio transmissions by foreign embassy personnel from the 1950s on.

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Optical heterodyne detection

Optical heterodyne detection is a method of extracting information encoded as modulation of the phase and/or frequency (wavelength) of electromagnetic radiation in the wavelength band of visible or infrared light.

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Optical pumping

Optical pumping is a process in which light is used to raise (or "pump") electrons from a lower energy level in an atom or molecule to a higher one.

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Optical rectenna

An optical rectenna is a rectenna (rectifying antenna) that works with visible or infrared light.

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Optical wireless communications

Optical wireless communications (OWC) is a form of optical communication in which unguided visible, infrared (IR), or ultraviolet (UV) light is used to carry a signal.

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Optics

Optics is the branch of physics which involves the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it.

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Opto-electronic oscillator

An opto-electronic oscillator (OEO) is an optoelectronic circuit that produces repetitive electronic sine wave and/or modulated optical continuous wave signals.

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ORFS

ORFS stands for Output RF Spectrum, where 'RF' stands for Radio Frequency.

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Orthogonal frequency-division multiple access

Orthogonal frequency-division multiple access (OFDMA) is a multi-user version of the popular orthogonal frequency-division multiplexing (OFDM) digital modulation scheme.

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Orthogonal frequency-division multiplexing

In telecommunications, orthogonal frequency-division multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies.

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Oudin coil

An Oudin coil, also called an Oudin oscillator or Oudin resonator, is a resonant transformer circuit that generates very high voltage, high frequency alternating current (AC) electricity at low current levels, used in the obsolete medical field of electrotherapy around the turn of the 20th century.

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Our Mr. Sun

Our Mr.

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Outline of radio

The following outline is provided as an overview of and topical guide to radio: Radio – transmission of signals by modulation of electromagnetic waves with frequencies below those of visible light.

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Outline of telecommunication

The following outline is provided as an overview of and topical guide to telecommunication: Telecommunication – the transmission of signals over a distance for the purpose of communication.

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Outline of television broadcasting

The following outline is provided as an overview of and topical guide to television broadcasting: Television broadcasting: form of broadcasting in which a television signal is transmitted by radio waves from a terrestrial (Earth based) transmitter of a television station to TV receivers having an antenna.

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Output power of an analog TV transmitter

Article needs redesign.

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Over-the-horizon radar

Over-the-horizon radar, or OTH (sometimes called beyond the horizon, or BTH), is a type of radar system with the ability to detect targets at very long ranges, typically hundreds to thousands of kilometres, beyond the radar horizon, which is the distance limit for ordinary radar.

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Overvoltage

When the voltage in a circuit or part of it is raised above its upper design limit, this is known as overvoltage.

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PacketCable

PacketCable network is a technology specification defined by the industry consortium CableLabs for using Internet Protocol (IP) networks to deliver multimedia services, such as IP telephony, conferencing, and interactive gaming on a cable television infrastructure.

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Paintball marker

A paintball marker, also known as a paintball gun, paint gun, or marker, is the main piece of paintball equipment in the sport of paintball.

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Parabolic antenna

A parabolic antenna is an antenna that uses a parabolic reflector, a curved surface with the cross-sectional shape of a parabola, to direct the radio waves.

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Parallel communication

In data transmission, parallel communication is a method of conveying multiple binary digits (bits) simultaneously.

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Park Electrochemical Corp

Park Electrochemical Corpis a Melville, New York-based materials manufacturer for the telecommunications, Internet infrastructure, high-end computing, and aerospace industries.

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Particle accelerator

A particle accelerator is a machine that uses electromagnetic fields to propel charged particles to nearly light speed and to contain them in well-defined beams.

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Particle beam

A particle beam is a stream of charged or neutral particles, in many cases moving at near the speed of light.

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Passband

A passband is the range of frequencies or wavelengths that can pass through a filter.

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Patch panel

A patch panel, patch bay, patch field or jack field is a device or unit featuring a number of jacks, usually of the same or similar type, for the use of connecting and routing circuits for monitoring, interconnecting, and testing circuits in a convenient, flexible manner.

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Paul I. Richards

Paul Irving Richards (1923–1978) was a physicist and applied mathematician.

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Paul Neill

Paul Neill (September 6, 1882 – October 1968) was an American electrical engineer at Bell Labs in the 1940s.

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Paul Oudin

Paul Marie Oudin (1851–1923) was a French physician and medical researcher.

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Payam Heydari

Payam Heydari (پيام حيدرى.) is an Iranian-American Professor who is noted for his contribution to the field of radio-frequency and millimeter-wave integrated circuits.

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Peak envelope power

Peak envelope power (PEP) is the highest envelope power supplied to the antenna transmission line by a transmitter during any full undistorted RF cycle or series of complete radio frequency cycles.

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Peckham Technology Inc

Peckham Technology Inc is a corporation based in the State of Washington that develops and manufactures complex electronics for military, aviation, and consumer applications.

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Penetration (telecommunications)

In telecommunication, the term penetration has the following meanings.

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Pentode

A pentode is an electronic device having five active electrodes.

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Peregrine Semiconductor

Peregrine Semiconductor is a San Diego-based manufacturer of high-performance RF (radio frequency) CMOS integrated circuits.

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Personal RF safety monitors

Electromagnetic field densitometers measure the exposure to electromagnetic radiation in certain ranges of the electromagnetic spectrum.

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Pet fence

A pet fence or fenceless boundary is an electronic system designed to keep a pet or other domestic animal within a set of predefined boundaries without the use of a physical barrier.

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Phantom circuit

In telecommunication and electrical engineering, a phantom circuit is an electrical circuit derived from suitably arranged wires with one or more conductive paths being a circuit in itself and at the same time acting as one conductor of another circuit.

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Phantom pain

Phantom pain sensations are described as perceptions that an individual experiences relating to a limb or an organ that is not physically part of the body.

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Phase contrast magnetic resonance imaging

Phase contrast magnetic resonance imaging (PC-MRI) is a specific type of magnetic resonance imaging used primarily to determine flow velocities.

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Phase noise

In signal processing, phase noise is the frequency domain representation of rapid, short-term, random fluctuations in the phase of a waveform, caused by time domain instabilities ("jitter").

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Phase shift module

A phase shift module is a microwave network module which provides a controllable phase shift of the RF signal.

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Philadelphia Phillies Radio Network

The Philadelphia Phillies Radio Network is a network of 21 radio stations in Pennsylvania, Delaware, and New Jersey that air Major League Baseball games of the Philadelphia Phillies.

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Photoacoustic imaging

Photoacoustic imaging (optoacoustic imaging) is a biomedical imaging modality based on the photoacoustic effect.

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Photometer

A photometer, generally, is an instrument that measures light intensity or the optical properties of solutions or surfaces.

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Photon energy

Photon energy is the energy carried by a single photon.

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Photonic metamaterial

A photonic metamaterial (PM), also known as an optical metamaterial, is a type of electromagnetic metamaterial, that interacts with light, covering terahertz (THz), infrared (IR) or visible wavelengths.

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Physics of magnetic resonance imaging

The physics of magnetic resonance imaging (MRI) involves the interaction of biological tissue with electromagnetic fields.

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Picoo Z

The Picoo Z (also sold under the brand name of Air Hogs Havoc Heli in North America) is a miniature remote-controlled 2-channel helicopter manufactured by Hong Kong-based Silverlit Toys.

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PIN diode

A PIN diode is a diode with a wide, undoped intrinsic semiconductor region between a p-type semiconductor and an n-type semiconductor region.

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Pittsburgh Penguins Radio Network

The Pittsburgh Penguins Radio Network is a radio network operated by the Pittsburgh Penguins of the National Hockey League that provides broadcasts for all the team's games.

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PK-3 Plus (ISS Experiment)

The PK-3 Plus or (Plasmakristall-3 Plus) laboratory is a joint Russian-German laboratory for the investigation of dusty/complex plasmas on board the International Space Station (ISS), with the principal investigators at the German Max Planck Institute for Extraterrestrial Physics and the Russian Institute for High Energy Densities.

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Plasma antenna

A plasma antenna is a type of radio antenna currently in development in which plasma is used instead of the metal elements of a traditional antenna.

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Plasma cutting

Plasma cutting is a process that cuts through electrically conductive materials by means of an accelerated jet of hot plasma.

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Plasma globe

A plasma globe or plasma lamp (also called plasma ball, dome, sphere, tube or orb, depending on shape) is (usually) a clear glass sphere filled with a mixture of various noble gases with a high-voltage electrode in the center of the sphere.

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Plasma lamp

Plasma lamps are a type of gas discharge lamp energized by radio frequency (RF) power.

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Plasma polymerization

Plasma polymerization (or glow discharge polymerization) uses plasma sources to generate a gas discharge that provides energy to activate or fragment gaseous or liquid monomer, often containing a vinyl group, in order to initiate polymerization.

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Plasma speaker

Plasma speakers or ionophones are a form of loudspeaker which varies air pressure via a high-energy electrical plasma instead of a solid diaphragm.

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Plasma stability

An important field of plasma physics is the stability of a plasma.

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Plasma stealth

Plasma stealth is a proposed process to use ionized gas (plasma) to reduce the radar cross-section (RCS) of an aircraft.

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Plasma torch

A plasma torch (also known as a plasma arc, plasma gun, or plasma cutter, plasmatron) is a device for generating a directed flow of plasma.

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Plasma-enhanced chemical vapor deposition

Plasma-enhanced chemical vapor deposition (PECVD) is a chemical vapor deposition process used to deposit thin films from a gas state (vapor) to a solid state on a substrate.

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Plate detector (radio)

In electronics, a plate detector (anode bend detector, grid bias detector) is a vacuum tube circuit in which an amplifying tube having a control grid is operated in a non-linear region of its grid voltage versus plate current transfer characteristic near plate current cutoff in order to demodulate an amplitude modulated carrier signal.

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PlayStation 2 accessories

Various accessories for the PlayStation 2 video game console have been produced by Sony, as well as third parties.

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PMC-Sierra

PMC-Sierra was a global fabless semiconductor company with offices worldwide that developed and sold semiconductor devices into the storage, communications, optical networking, printing, and embedded computing marketplaces.

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PMR446

PMR446 (personal mobile radio, 446 MHz) is a part of the UHF radio frequency range that is open without licensing for business and personal use in most countries of the European Union.

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Point-to-multipoint communication

In telecommunications, point-to-multipoint communication (P2MP, PTMP or PMP) is communication which is accomplished via a distinct type of one-to-many connection, providing multiple paths from a single location to multiple locations.

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Point-to-point construction

Point-to-point construction is a non-automated method of construction of electronics circuits widely used before the use of printed circuit boards (PCBs) and automated assembly gradually became widespread following their introduction in the 1950s.

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Pointer Telocation

Pointer Telocation is a publicly traded company, headquartered in Israel, that develops automatic vehicle location solutions and provides roadside automotive service.

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Police IT

Police IT is the flagship project of the Karnataka State Police aimed at providing an ERP solution for the police by digitizing all the processes involved in policing from basic functions like Crime, Law and Order maintenance and traffic to ancillary functions like police motor transport and training; and connecting all the locations of the Karnataka State Police viz.

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Polypropylene

Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications.

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Polytetrafluoroethylene

Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene that has numerous applications.

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Pong Research

Pong Research was incorporated in 2011 and in 2014 relocated from Virginia to Encinitas, CA.

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Poppy (satellite)

POPPY is the code name given to a series of U.S. intelligence satellites operated by the National Reconnaissance Office.

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Port (circuit theory)

In electrical circuit theory, a port is a pair of terminals connecting an electrical network or circuit to an external circuit, a point of entry or exit for electrical energy.

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Port of Tianjin governance, traffic management and law enforcement

The Port of Tianjin falls under the supervisory and regulatory purview of the Tianjin Municipality People’s Government.

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Power amplifier classes

Power amplifier classes are, in electronics, letter symbols applied to different power amplifier types.

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Power dividers and directional couplers

Power dividers (also power splitters and, when used in reverse, power combiners) and directional couplers are passive devices used mostly in the field of radio technology.

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Powerwave Technologies

Powerwave Technologies, Inc.

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Preclinical imaging

Preclinical imaging is the visualization of living animals for research purposes, such as drug development.

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Premiership of Tony Blair

The premiership of Tony Blair began on 2 May 1997 and ended on 27 June 2007.

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Preselector

A preselector is a name for an electronic device that connects between a radio antenna and a radio receiver.

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Presidency of Warren G. Harding

The presidency of Warren G. Harding began on March 4, 1921, when Warren G. Harding was inaugurated as President of the United States, and ended when he died on August 2, 1923, a span of days.

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Primary line constants

The primary line constants are parameters that describe the characteristics of conductive transmission lines, such as pairs of copper wires, in terms of the physical electrical properties of the line.

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Prince Sultan Advanced Technology Research Institute

Prince Sultan Advanced Technology Research Institute (PSATRI, Arabic: معهد الأمير سلطان لأبحاث التقنيات المتقدمة, Ma'ahad Al-Amir Sultan le-abhas al-taqniat al-motaqaddemah) is an independent scientific organization of the Saudi government, located in the College of Engineering at King Saud University in the capital city of Riyadh, Saudi Arabia.

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Pro Electron

Pro Electron or EECA is the European type designation and registration system for active components (such as semiconductors, liquid crystal displays, sensor devices, electronic tubes and cathode ray tubes).

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Product certification

Product certification or product qualification is the process of certifying that a certain product has passed performance tests and quality assurance tests, and meets qualification criteria stipulated in contracts, regulations, or specifications (typically called "certification schemes" in the product certification industry).

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Product detector

A product detector is a type of demodulator used for AM and SSB signals.

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Programmable magnet

Programmed magnets, or polymagnets are magnetic structures that incorporate correlated patterns of magnets with alternating polarity, designed to achieve a desired behavior and deliver stronger local force.

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Proxim Wireless

Proxim Wireless Corporation is a Fremont, California-based company that builds scalable broadband wireless networking systems for communities, enterprises, governments, and service providers.

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Proximity card

A proximity card or prox card is a "contactless" smart card which can be read without inserting it into a reader device, as required by earlier magnetic stripe cards such as credit cards and "contact" type smart cards.

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Proximity effect (electromagnetism)

In a conductor carrying alternating current, if currents are flowing through one or more other nearby conductors, such as within a closely wound coil of wire, the distribution of current within the first conductor will be constrained to smaller regions.

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PSK31

PSK31 or "Phase Shift Keying, 31 Baud", also BPSK31 and QPSK31, is a popular computer-sound card-generated radioteletype mode, used primarily by amateur radio operators to conduct real-time keyboard-to-keyboard chat, most often using frequencies in the high frequency amateur radio bands (near-shortwave).

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Pulsed radiofrequency

Pulsed radiofrequency is the technique whereby radio frequency (RF) oscillations are gated at a rate of pulses per second (cycles per second, defined as a hertz (Hz)).

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Pulse~Link

Pulse~LINK is a privately held fabless integrated circuit semiconductor corporation headquartered in Carlsbad, California, located just north of San Diego California, in the United States.

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Q meter

A Q meter is a piece of equipment used in the testing of radio frequency circuits.

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QSL card

A QSL card is a written confirmation of either a two-way radiocommunication between two amateur radio stations or a one-way reception of a signal from an AM radio, FM radio, television or shortwave broadcasting station.

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Quadrature amplitude modulation

Quadrature amplitude modulation (QAM) is the name of a family of digital modulation methods and a related family of analog modulation methods widely used in modern telecommunications to transmit information.

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Quadrupole ion trap

A quadrupole ion trap is a type of ion trap that uses dynamic electric fields to trap charged particles.

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Quadrupole mass analyzer

The quadrupole mass analyzer (QMS) is one type of mass analyzer used in mass spectrometry.

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Quantum biology

Quantum biology refers to applications of quantum mechanics and theoretical chemistry to biological objects and problems.

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Quantum bus

A quantum bus is a device which can be used to store or transfer information between independent qubits in a quantum computer, or combine two qubits into a superposition.

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Quantum Zeno effect

The quantum Zeno effect (also known as the Turing paradox) is a feature of quantum mechanical systems allowing a particle's time evolution to be arrested by measuring it frequently enough with respect to some chosen measurement setting.

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Quarter-wave impedance transformer

A quarter-wave impedance transformer, often written as λ/4 impedance transformer, is a component used in electrical engineering consisting of a length of transmission line or waveguide exactly one-quarter of a wavelength (λ) long and terminated in some known impedance.

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R-390A

The R-390A /URR is a general coverage HF radio communications receiver designed by Collins Radio Company for the US military.

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Radar detector

A radar detector is an electronic device used by motorists to detect if their speed is being monitored by police or law enforcement using a radar gun.

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Radar signal characteristics

A radar system uses a radio frequency electromagnetic signal reflected from a target to determine information about that target.

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Radial (radio)

In RF engineering, radial has two distinct meanings, both referring to lines which radiate from (or intersect at) a radio antenna, but neither meaning is related to the other.

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Radiation-induced cancer

Up to 10% of invasive cancers are related to radiation exposure, including both ionizing radiation and non-ionizing radiation.

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Radical polymerization

Free-radical polymerization (FRP) is a method of polymerization by which a polymer forms by the successive addition of free-radical building blocks.

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Radio

Radio is the technology of using radio waves to carry information, such as sound, by systematically modulating properties of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase, or pulse width.

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Radio 4 UK Theme

The BBC Radio 4 UK Theme is an orchestral arrangement of traditional British and Irish airs compiled by Fritz Spiegl and arranged by Manfred Arlan.

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Radio Amateur Civil Emergency Service

The Radio Amateur Civil Emergency Service (RACES) is a standby radio service provided for in Part 97.407 of the Federal Communications Commission (FCC) rules and regulations governing amateur radio in the United States.

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Radio astronomy

Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies.

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Radio broadcasting

Radio broadcasting is transmission by radio waves intended to reach a wide audience.

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Radio Data System

Radio Data System (RDS) is a communications protocol standard for embedding small amounts of digital information in conventional FM radio broadcasts.

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Radio frequency microelectromechanical system

A radio frequency microelectromechanical system (RFMEMS) is a microelectromechanical systems with electronic components comprising moving sub-millimeter-sized parts that provide radio frequency functionality.

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Radio frequency skin tightening

Radio frequency skin tightening (RF) is an aesthetic technique that uses RF energy to heat tissue and stimulate subdermal collagen production in order to reduce the appearance of fine lines and loose skin.

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Radio over IP

Radio over Internet Protocol, or RoIP, is similar to Voice over IP (VoIP), but augments two-way radio communications rather than telephone calls.

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Radio propagation

Radio propagation is the behavior of radio waves as they travel, or are propagated, from one point to another, or into various parts of the atmosphere.

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Radio receiver

In radio communications, a radio receiver (receiver or simply radio) is an electronic device that receives radio waves and converts the information carried by them to a usable form.

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Radio science subsystem

A radio science subsystem (RSS) is a subsystem placed on board a spacecraft for radio science purposes.

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Radio spectrum pollution

Radio spectrum pollution is the straying of waves in the radio and electromagnetic spectrums outside their allocations that cause problems for some activities.

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Radio star

Stellar radio sources, radio source stars or radio stars are stellar objects that produce copious emissions of various radio frequencies, whether constant or pulsed.

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Radio telescope

A radio telescope is a specialized antenna and radio receiver used to receive radio waves from astronomical radio sources in the sky in radio astronomy.

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Radio wave

Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light.

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Radio Wave

Radio Wave may refer to.

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Radio Waves

Radio Waves may refer to.

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Radio-frequency engineering

Radio-frequency engineering, or RF engineering, is a subset of electrical engineering involving the application of transmission line, waveguide, antenna and electromagnetic field principles to the design and application of devices that produce or utilize signals within the range of about 20 kHz up to 300 GHz.

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Radio-frequency identification

Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects.

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Radio-frequency induction

Radio-frequency induction or RF induction is the use of a radio frequency magnetic field to transfer energy by means of electromagnetic induction in the near field.

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Radiofrequency ablation

Radiofrequency ablation (RFA) is a medical procedure in which part of the electrical conduction system of the heart, tumor or other dysfunctional tissue is ablated using the heat generated from medium frequency alternating current (in the range of 350–500 kHz).

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Radiofrequency coil

Radiofrequency coils (RF coils) are the receivers, and sometimes also the transmitters, of radiofrequency (RF) signals in equipment used in magnetic resonance imaging (MRI).

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Radiofrequency thermocoagulation

Radiofrequency thermocoagulation (RFTC) is a thermal pain treatment procedure.

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Radioglaciology

Radioglaciology is the study of glaciers and ice sheets using radar.

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Radiology

Radiology is the science that uses medical imaging to diagnose and sometimes also treat diseases within the body.

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Radiosonde

A radiosonde is a battery-powered telemetry instrument package carried into the atmosphere usually by a weather balloon that measures various atmospheric parameters and transmits them by radio to a ground receiver.

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Rain fade

Rain fade refers primarily to the absorption of a microwave radio frequency (RF) signal by atmospheric rain, snow, or ice, and losses which are especially prevalent at frequencies above 11 GHz.

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Rainbow Gathering

Rainbow Gatherings are temporary loosely knit communities of people who congregate annually in remote forests around the world for one or more weeks at a time to enact a shared ideology of peace, harmony, freedom, and respect.

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Ranger 6

Ranger 6 was a lunar probe in the Ranger program, a robotic spacecraft series launched by NASA in the early and mid-1960s to obtain the first close-up images of the Moon's surface.

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Ranger 7

Ranger 7 was the first space probe of the United States to successfully transmit close images of the lunar surface back to Earth.

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Rat-race coupler

A rat-race coupler (also known as a hybrid ring coupler) is a type of coupler used in RF and microwave systems.

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RATAN-600

The RATAN-600 (РАТАН-600 – радиоастрономический телескоп Академии наук - 600, an acronym for the "Academy of Sciences Radio Telescope - 600") is a radio telescope in Zelenchukskaya, Russia.

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Rate (mathematics)

In mathematics, a rate is the ratio between two related quantities.

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Ray Zinn

Raymond D. "Ray" Zinn (born in El Centro, California, US, on September 24, 1937) is an inventor, entrepreneur and published author.

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RC oscillator

Linear electronic oscillator circuits, which generate a sinusoidal output signal, are composed of an amplifier and a frequency selective element, a filter.

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RCA Studio II

The RCA Studio II is a home video game console made by RCA that debuted in January 1977.

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Reactive-ion etching

Reactive-ion etching (RIE) is an etching technology used in microfabrication.

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Real-time locating system

Real-time locating systems (RTLS) are used to automatically identify and track the location of objects or people in real time, usually within a building or other contained area.

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Received signal strength indication

In telecommunications, received signal strength indicator (RSSI) is a measurement of the power present in a received radio signal.

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Reciprocity (electromagnetism)

In classical electromagnetism, reciprocity refers to a variety of related theorems involving the interchange of time-harmonic electric current densities (sources) and the resulting electromagnetic fields in Maxwell's equations for time-invariant linear media under certain constraints.

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Reconfigurable antenna

A reconfigurable antenna is an antenna capable of modifying dynamically its frequency and radiation properties in a controlled and reversible manner.

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Red Pitaya (hardware)

Red Pitaya is closed-source hardware project intended to be alternative for many expensive laboratory measurement and control instruments.

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Reflector (antenna)

An antenna reflector is a device that reflects electromagnetic waves.

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Reflex receiver

A reflex radio receiver, occasionally called a reflectional receiver, is a radio receiver design in which the same amplifier is used to amplify the high-frequency radio signal (RF) and low-frequency audio (sound) signal (AF).

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Regency TR-1

The Regency TR-1 was the first commercially manufactured transistor radio.

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Regenerative circuit

A regenerative circuit is an amplifier circuit that employs positive feedback (also known as regeneration); some of the output of the amplifying device is applied to its input without phase inversion, which reinforces the signal, increasing the amplification.

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Relative permittivity

The relative permittivity of a material is its (absolute) permittivity expressed as a ratio relative to the permittivity of vacuum.

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Relativistic electromagnetism

Relativistic electromagnetism is a physical phenomenon explained in electromagnetic field theory due to Coulomb's law and Lorentz transformations.

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Remote keyless system

A keyless entry system is an electronic lock that controls access to a building or vehicle without using a traditional mechanical key.

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Remote pickup unit

A remote pickup unit or RPU is a radio system using special radio frequencies set aside for electronic news gathering (ENG) and remote broadcasting.

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Remote radio head

A remote radio head (RRH), also called a remote radio unit (RRU) in wireless networks, is a remote radio transceiver that connects to an operator radio control panel via electrical or wireless interface.

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Repetitive Electrical Impulse Noise

Repetitive Electrical Impulse Noise (REIN) is a term applied to some interference found on problematic DSL internet connections.

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Resonator

A resonator is a device or system that exhibits resonance or resonant behavior, that is, it naturally oscillates at some frequencies, called its resonant frequencies, with greater amplitude than at others.

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RF (disambiguation)

RF is an abbreviation for radio frequency.

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RF and microwave filter

Radio frequency (RF) and microwave filters represent a class of electronic filter, designed to operate on signals in the megahertz to gigahertz frequency ranges (medium frequency to extremely high frequency).

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RF antenna ion source

An RF antenna ion source (or radio frequency antenna ion source) is an internal multi-cusp design that can produce a particle beam of about ~30 to 40 mA current.

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RF connector

A coaxial RF connector (radio frequency connector) is an electrical connector designed to work at radio frequencies in the multi-megahertz range.

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RF front end

In a radio receiver circuit, the RF front end is a generic term for all the circuitry between the antenna up to and including the mixer stage.

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RF modulator

An RF modulator (or radio frequency modulator) is an electronic device whose input is a baseband signal which is used to modulate a radio frequency source.

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RF Planning

In the context of mobile radio communication systems, RF Planning is the process of assigning frequencies, transmitter locations and parameters of a wireless communications system to provide sufficient coverage and capacity for the services required.

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RF power amplifier

A radio frequency power amplifier (RF power amplifier) is a type of electronic amplifier that converts a low-power radio-frequency signal into a higher power signal.

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RF probe

An RF probe is a device which allows electronic test equipment to measure radio frequency (RF) signal in an electronic circuit.

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RF resonant cavity thruster

A radio frequency (RF) resonant cavity thruster, also known as an EmDrive, is a proposed design for a propellant-free drive which would have to violate both conservation of momentum and conservation of energy in order to work.

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RF switch

An RF Switch or Microwave Switch is a device to route high frequency signals through transmission paths.

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RF switch matrix

An RF switch matrix is a system of discrete electronic components that are integrated to route radio frequency(RF) signals between multiple inputs and multiple outputs.

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RG-58

RG-58/U is a type of coaxial cable often used for low-power signal and RF connections.

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RG-59

RG-59/U is a specific type of coaxial cable, often used for low-power video and RF signal connections.

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Ricochet (Internet service)

Ricochet was one of the pioneering wireless Internet access services in the United States, before Wi-Fi, 3G, and other technologies were available to the general public.

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RigExpert

Rig Expert Ukraine Ltd is a manufacturer of HAM and PMR Two-way radio RF antenna analysis and antenna tuning equipment.

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RiP!: A Remix Manifesto

RiP!: A Remix Manifesto is a 2008 open-source documentary film about "the changing concept of copyright" directed by Brett Gaylor.

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Roaming

Roaming is a wireless telecommunication term typically used with mobile devices (like mobile phones).

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Robotic lawn mower

A robotic lawn mower is an autonomous robot used to cut lawn grass.

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Rolf Widerøe

Rolf Widerøe (11 July 1902 – 11 October 1996), was a Norwegian accelerator physicist who was the originator of many particle acceleration concepts, including the resonance accelerator and the betatron accelerator.

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Rolling code

A rolling code (or sometimes called a hopping code) is used in keyless entry systems to prevent replay attacks, where an eavesdropper records the transmission and replays it at a later time to cause the receiver to 'unlock'.

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Roper Technologies

Roper Technologies, Inc. (formerly Roper Industries, Inc.) is an American diversified industrial company that produces engineered products for global niche markets.

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RSI Corporation

RSI Corporation (Radiofrequency Safety International) is a safety compliance consulting firm specializing in the telecommunications industry, located in Kiowa, Kansas, United States.

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Rubidium standard

A rubidium standard or rubidium atomic clock is a frequency standard in which a specified hyperfine transition of electrons in rubidium-87 atoms is used to control the output frequency.

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Rudolf Abel

Rudolf Ivanovich Abel (Рудо́льф Ива́нович А́бель), real name Vilyam "Willie" Genrikhovich Fisher (Ви́льям "Ви́лли" Ге́нрихович Фи́шер; 11 July 1903 – 15 November 1971) was a Soviet intelligence officer.

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Russian tube designations

Vacuum tubes produced in the former Soviet Union and in present-day Russia carry their own unique designations.

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S-GPS

Simultaneous GPS or S-GPS is a method to enhance a mobile phone's satellite-based position reporting ability to a mobile network operator.

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SAES Getters

SAES Getters S.p.A. is an Italian joint stock company, established in 1940.

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Satellite Business Systems

Satellite Business Systems, abbreviated as SBS, was a company founded by IBM, Aetna, COMSAT (and later wholly purchased by IBM and then subsequently sold to MCI), that provided private professional satellite communications through its SBS fleet of FSS geosynchronous satellites, and was the first company to do so.

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Satellite data unit

A satellite data unit (SDU) is an avionics device installed in an aircraft that allows air/ground communication via a satellite network.

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Satellite navigation

A satellite navigation or satnav system is a system that uses satellites to provide autonomous geo-spatial positioning.

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Scanning near-field ultrasound holography

Scanning near-field ultrasound holography (SNFUH) is a method for performing nondestructive nano-scale high-resolution imaging of buried and embedded structures.

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Scattering parameters

Scattering parameters or S-parameters (the elements of a scattering matrix or S-matrix) describe the electrical behavior of linear electrical networks when undergoing various steady state stimuli by electrical signals.

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Schaffer–Vega diversity system

The Schaffer–Vega diversity system (SVDS) was a wireless guitar system developed in 1975–76, engineered and prototyped by Ken Schaffer in New York City, and manufactured by the Vega Corporation, El Monte, California.

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SCR-197

The SCR-197 was a ground mobile high frequency radio station used by the United States military prior to and during World War II, notably during the Battle of Wake Island in 1941.

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SCR-203

The SCR-203 was a U.S. Army radio transceiver used during World War II and designed to be mounted on an animal pack saddle.

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SCR-277

The SCR-277 was a mobile, trailer mounted radio range set for radio guidance of aircraft.

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SCR-536

The SCR-536 was a hand-held radio transceiver used by the US Army Signal Corps in World War II.

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Sectional chart

In United States aviation, a sectional chart, often called sectional for short, is a type of aeronautical chart designed for navigation under visual flight rules.

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Sector antenna

A sector antenna is a type of directional microwave antenna with a sector-shaped radiation pattern.

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Secure access module

A Secure Access Module (or Secure Application Module) is based on SmartCard Integrated circuits and is used to enhance the security and cryptography performance in devices, commonly in devices needing to perform secure transactions, such as payment terminals.

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Sega Genesis

The Sega Genesis, known as the in regions outside of North America, is a 16-bit home video game console developed and sold by Sega.

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SelTrac

SelTrac is a digital railway signalling technology used to automatically control the movements of rail vehicles.

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Semiconductor

A semiconductor material has an electrical conductivity value falling between that of a conductor – such as copper, gold etc.

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Senkaku Islands dispute

The Senkaku Islands dispute, or Diaoyu Islands dispute, concerns a territorial dispute over a group of uninhabited islands known as the Senkaku Islands in Japan, the Diaoyu Islands in the People's Republic of China (PRC), and Tiaoyutai Islands in the Republic of China (ROC or Taiwan).

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Sensor node

A sensor node, also known as a mote (chiefly in North America), is a node in a sensor network that is capable of performing some processing, gathering sensory information and communicating with other connected nodes in the network.

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SensorDynamics

SensorDynamics was a European semiconductor and MEMS company specialized in developing and manufacturing high-volume micro- and wireless semiconductor sensor products for applications in automotive, industry and high-end consumer sectors.

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Set-top box

A set-top box (STB) or set-top unit (STU) (one type also colloquially known as a cable box) is an information appliance device that generally contains a TV-tuner input and displays output to a television set and an external source of signal, turning the source signal into content in a form that then be displayed on the television screen or other display device.

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Shinnar–Le Roux algorithm

The Shinnar–Le Roux (SLR) algorithm is a mathematical tool for generating frequency-selective radio frequency (RF) pulses in magnetic resonance imaging (MRI).

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Shooting of Joseph Erin Hamley

On March 7, 2006, Joseph Erin Hamley (February 3, 1985 – March 7, 2006), an unarmed man, was fatally shot by Arkansas State Trooper Larry P. Norman of West Fork, Arkansas.

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Short-range device

A short-range device (SRD), described by ECC Recommendation 70-03, is a radio-frequency transmitter device used in telecommunication for the transmission of information, which has low capability of causing harmful interference to other radio equipment.

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Shortwave radio

Shortwave radio is radio transmission using shortwave radio frequencies.

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Shortwave radio receiver

A shortwave radio receiver is a radio receiver that can receive one or more shortwave bands, between 1.6 and 30 MHz.

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Shunt impedance

In accelerator physics, shunt impedance is a measure of the strength with which an eigenmode of a resonant radio frequency structure (e.g., in a microwave cavity) interacts with charged particles on a given straight line, typically along the axis of rotational symmetry.

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Sideband

In radio communications, a sideband is a band of frequencies higher than or lower than the carrier frequency, containing power as a result of the modulation process.

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Siegfried Linkwitz

Siegfried Linkwitz (born 1935) is well known as the co-inventor of the Linkwitz–Riley filter along with Russ Riley.

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Sigma Designs

Sigma Designs is an American public corporation that designs and builds high-performance system-on-a-chip semiconductor technologies for Internet-based set-top boxes, DVD players/recorders, high-definition televisions, media processors, digital media adapters, portable media players and home connectivity products.

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Signal generator

A signal generator is an electronic device that generates repeating or non-repeating electronic signals in either the analog or the digital domain.

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Signal overspill

Signal overspill is the receiving of a broadcast signal outside of its geographical target area.

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Signal reflection

Signal reflection occurs when a signal is transmitted along a transmission medium, such as a copper cable or an optical fiber.

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Signal strength in telecommunications

In telecommunications, particularly in radio frequency, signal strength (also referred to as field strength) refers to the transmitter power output as received by a reference antenna at a distance from the transmitting antenna.

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Signal tracer

A signal tracer is a piece of electronic test equipment used to troubleshoot radio and other electronic circuitry.

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Signals intelligence

Signals intelligence (SIGINT) is intelligence-gathering by interception of signals, whether communications between people (communications intelligence—abbreviated to COMINT) or from electronic signals not directly used in communication (electronic intelligence—abbreviated to ELINT).

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Silicon Motion

Silicon Motion Technology Corporation (NasdaqGS: SIMO) is a company in developing NAND flash controller integrated circuits (ICs) for solid-state storage devices and specialty RF ICs for mobile devices.

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Silvaco

Silvaco, Inc. is a privately owned provider of electronic design automation (EDA) software and TCAD process and device simulation software.

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Silver

Silver is a chemical element with symbol Ag (from the Latin argentum, derived from the Proto-Indo-European ''h₂erǵ'': "shiny" or "white") and atomic number 47.

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SIMDIS

Under direction of the Office of Naval Research, the Naval Research Laboratory’s Code 5770 produced the SIMDIS 3-D Analysis and Display Toolset to the US Department of Defense community.

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Single operator two radios

Single operator two radios (SO2R) is an operating practice employed by some competitors in the sport of amateur radio contesting.

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Single-carrier FDMA

Single-carrier FDMA (SC-FDMA) is a frequency-division multiple access scheme.

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Single-sideband modulation

In radio communications, single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a type of modulation, used to transmit information, such as an audio signal, by radio waves.

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Single-wire transmission line

A single-wire transmission line (or single wire method) is a method of transmitting electrical power or signals using only a single electrical conductor.

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Skew (antenna)

Skew is a term used in antenna engineering.

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Skywave

In radio communication, skywave or skip refers to the propagation of radio waves reflected or refracted back toward Earth from the ionosphere, an electrically charged layer of the upper atmosphere.

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Skyworks Solutions

Skyworks Solutions, Inc. is an American semiconductor company headquartered in Woburn, Massachusetts, United States.

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Slotted line

Slotted lines are used for microwave measurements and consist of a movable probe inserted into a slot in a transmission line.

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Small Outline Integrated Circuit

A Small Outline Integrated Circuit (SOIC) is a surface-mounted integrated circuit (IC) package which occupies an area about 30 to 50 % less than an equivalent dual in-line package (DIP), with a typical thickness that is 70 % less.

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Smith chart

The Smith chart, invented by Phillip H. Smith (1905–1987), is a graphical aid or nomogram designed for electrical and electronics engineers specializing in radio frequency (RF) engineering to assist in solving problems with transmission lines and matching circuits.

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SnapStream

SnapStream is a privately held software company based in Houston, Texas, USA that focuses on building TV monitoring software for organizations in broadcast, government and education.

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Society of Broadcast Engineers

The Society of Broadcast Engineers (SBE) is a professional organization for engineers in broadcast radio and television.

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Soitec

Soitec is a France-based international industrial company specialized in generating and manufacturing high performance semiconductor materials.

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Solar flare

A solar flare is a sudden flash of increased Sun's brightness, usually observed near its surface.

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Solid-state nuclear magnetic resonance

Solid-state NMR (SSNMR) spectroscopy is a kind of nuclear magnetic resonance (NMR) spectroscopy, characterized by the presence of anisotropic (directionally dependent) interactions.

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Sonobuoy

A sonobuoy (a portmanteau of sonar and buoy) is a relatively small buoy (typically, in diameter and long) expendable sonar system that is dropped/ejected from aircraft or ships conducting anti-submarine warfare or underwater acoustic research.

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Sound amplification by stimulated emission of radiation

Sound amplification by stimulated emission of radiation (SASER) refers to a device that emits acoustic radiation.

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Soundcast

Soundcast LLC is a privately funded company that creates wireless audio technologies for the consumer & commercial markets.

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Soviet integrated circuit designation

This article describes the nomenclature for integrated circuits manufactured in the Soviet Union.

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Space Communications and Navigation Program

The Space Communications and Navigation (SCaN) program places the three prime NASA space communications networks, Space Network (SN), Near Earth Network (NEN) (previously known as the Ground Network or GN), and the Deep Space Network (DSN), under one Management and Systems Engineering umbrella.

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Space mapping

The space mapping methodology for modeling and design optimization of engineering systems was first discovered by John Bandler in 1993.

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Space Micro Inc

Space Micro Inc is an American company that supplies radiation hardened electronics for space and military applications.

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Spacecraft

A spacecraft is a vehicle or machine designed to fly in outer space.

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Spark plug

A spark plug (sometimes, in British English, a sparking plug, and, colloquially, a plug) is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within the engine.

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Spark-gap transmitter

A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.

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Special Astrophysical Observatory of the Russian Academy of Science

The Special Astrophysical Observatory (Специальная Астрофизическая Обсерватория), or SAO RAS for short, is an astronomical observatory, set up in 1966 in the USSR, now operated by the Russian Academy of Sciences.

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Specific absorption rate

Specific absorption rate (SAR) is a measure of the rate at which energy is absorbed by the human body when exposed to a radio frequency (RF) electromagnetic field.

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Spectral density

The power spectrum S_(f) of a time series x(t) describes the distribution of power into frequency components composing that signal.

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Spectrum analyzer

A spectrum analyzer measures the magnitude of an input signal versus frequency within the full frequency range of the instrument.

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Spectrum commons theory

The Spectrum Commons theory states that the telecommunication radio spectrum should be directly managed by its users rather than regulated by governmental or private institutions.

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Spectrum management

Spectrum management is the process of regulating the use of radio frequencies to promote efficient use and gain a net social benefit.

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Specular reflection

Specular reflection, also known as regular reflection, is the mirror-like reflection of waves, such as light, from a surface.

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Speed of light

The speed of light in vacuum, commonly denoted, is a universal physical constant important in many areas of physics.

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Spharophon

The Sphärophon or a Spherophone is an electrical musical instrument that was first made as the "Electrophon" around 1921 by Jörg Mager, later modified, renamed and exhibited in 1926.

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Spice (bomb)

The "SPICE" (Smart, Precise Impact, Cost-Effective) is an Israeli-developed, EO/GPS-guided guidance kit for converting air-droppable unguided bombs into precision guided bombs.

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Spin echo

In magnetic resonance, a spin echo is the refocusing of spin magnetisation by a pulse of resonant electromagnetic radiation.

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Spin–lattice relaxation in the rotating frame

Spin–lattice relaxation in the rotating frame is the mechanism by which Mxy, the transverse component of the magnetization vector, exponentially decays towards its equilibrium value of zero, under the influence of a radio frequency (RF) field in nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI).

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Spurious emission

A spurious emission is any radio frequency not deliberately created or transmitted, especially in a device which normally does create other frequencies.

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Spurious-free dynamic range

Spurious-free dynamic range (SFDR) is the strength ratio of the fundamental signal to the strongest spurious signal in the output.

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Spurline

The spurline is a type of radio-frequency and microwave distributed element filter with band-stop (notch) characteristics, most commonly used with microstrip transmission lines.

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Spy video car

The Spy Video Car is a hybrid product created by mixing a traditional RC car and a video baby monitor.

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SQUID

A SQUID (for superconducting quantum interference device) is a very sensitive magnetometer used to measure extremely subtle magnetic fields, based on superconducting loops containing Josephson junctions.

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Standing wave ratio

In radio engineering and telecommunications, standing wave ratio (SWR) is a measure of impedance matching of loads to the characteristic impedance of a transmission line or waveguide.

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Stanley Autler

Stanley Howard Autler (March 28, 1922 – October 16, 1991) was an American physicist.

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Star

A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.

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StarCom21

StarCom21 is a statewide public safety trunked radio system in Illinois.

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STARGATE

STARGATE—Spacecraft Tracking and Astronomical Research into Gigahertz Astrophysical Transient Emission—is a radio-frequency (RF) technology facility currently under development in south Texas.

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Stealth aircraft

Stealth aircraft are designed to avoid detection using a variety of technologies that reduce reflection/emission of radar, infrared, visible light, radio-frequency (RF) spectrum, and audio, collectively known as stealth technology.

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Stealth technology

Stealth technology also termed low observable technology (LO technology) is a sub-discipline of military tactics and passive electronic countermeasures, which cover a range of techniques used with personnel, aircraft, ships, submarines, missiles and satellites to make them less visible (ideally invisible) to radar, infrared, sonar and other detection methods.

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Stemco

Stemco (from "Specialized Truck Equipment Manufacturing Company") is a Longview, TX, based company that manufactures and distributes products for the global commercial vehicle market.

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Stern–Gerlach experiment

The Stern–Gerlach experiment demonstrated that the spatial orientation of angular momentum is quantized.

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Sticky & Sweet Tour

Sticky & Sweet Tour was the eighth concert tour by American singer Madonna to promote her eleventh studio album, Hard Candy.

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Street light

A street light, light pole, lamppost, street lamp, light standard, or lamp standard is a raised source of light on the edge of a road or path.

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Stryker

The IAV (Interim Armored Vehicle) Stryker is a family of eight-wheeled armored fighting vehicles derived from the Canadian LAV III and based on the Swiss Piranha III 8×8.

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Stub (electronics)

In microwave and radio-frequency engineering, a stub or resonant stub is a length of transmission line or waveguide that is connected at one end only.

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Studio/transmitter link

A studio/transmitter link (or STL) sends a radio station's or television station's audio and video from the broadcast studio or origination facility to a radio transmitter, television transmitter or uplink facility in another location.

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Subaru Legacy (second generation)

For a complete overview of all generations, see Subaru Legacy The second-generation Subaru Legacy was marketed in Japan from October 1993, and July 1994 marked the second generation in North America with a full body and chassis revision.

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Substrate coupling

In an integrated circuit, a signal can couple from one node to another via the substrate.

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Super high frequency

Super high frequency (SHF) is the ITU designation for radio frequencies (RF) in the range between 3 and 30 gigahertz (GHz).

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Super Wi-Fi

Super Wi-Fi is a term coined by the United States Federal Communications Commission (FCC) to describe a wireless networking proposal which the FCC plans to use for the creation of longer-distance wireless Internet access.

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Supercapacitor

A supercapacitor (SC) (also called a supercap, ultracapacitor or Goldcap) is a high-capacity capacitor with capacitance values much higher than other capacitors (but lower voltage limits) that bridge the gap between electrolytic capacitors and rechargeable batteries.

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Superconducting radio frequency

Superconducting radio frequency (SRF) science and technology involves the application of electrical superconductors to radio frequency devices.

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Superheterodyne transmitter

Superheterodyne transmitter is a radio or TV transmitter which uses an intermediate frequency signal in addition to radio frequency signal.

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Susceptor

A susceptor is a material used for its ability to absorb electromagnetic energy and convert it to heat (which is sometimes designed to be re-emitted as infrared thermal radiation).

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Swarm robotics

Swarm robotics is an approach to the coordination of multiple robots as a system which consist of large numbers of mostly simple physical robots.

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Switched-mode power supply

A switched-mode power supply (switching-mode power supply, switch-mode power supply, switched power supply, SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently.

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SWR meter

The SWR meter or VSWR (voltage standing wave ratio) meter measures the standing wave ratio in a transmission line.

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Synchrocyclotron

A synchrocyclotron is a special type of cyclotron, patented by Edwin McMillan, in which the frequency of the driving RF electric field is varied to compensate for relativistic effects as the particles' velocity begins to approach the speed of light.

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Syneron Medical

Syneron Medical Ltd., also known as Syneron Candela, is a public company, that develops and markets esthetic medical products.

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System camera

A system camera is a camera with interchangeable components that constitutes the core of a system.

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System on a chip

A system on a chip or system on chip (SoC) is an integrated circuit (also known as an "IC" or "chip") that integrates all components of a computer or other electronic systems.

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Sytek Inc

The Sytek Inc., now known as Hughes LAN Systems Inc., created the NetBIOS protocol, used by Microsoft to make its early networks.

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T pad

The T pad is a specific type of attenuator circuit in electronics whereby the topology of the circuit is formed in the shape of the letter "T".

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T-Mobile

T-Mobile is the brand name used by the mobile communications subsidiaries of the German telecommunications company Deutsche Telekom AG.

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T-Mobile US

T-Mobile US, Inc., commonly shortened to T-Mobile, is a United States-based wireless network operator whose majority shareholder is the German telecommunications company Deutsche Telekom (DT). Its headquarters are located in Bellevue, Washington, in the Seattle metropolitan area. T-Mobile is the third largest wireless carrier in the United States with 74 million customers as of Q1 2018. T-Mobile US provides wireless voice and data services in the United States, Puerto Rico and the U.S. Virgin Islands under the T-Mobile and MetroPCS brands (which it acquired in a reverse takeover in 2013, resulting in the company going public on the NASDAQ stock exchange), and also serves as the host network for many mobile virtual network operators. The company has annual revenues of over $40 billion. In 2015, Consumer Reports named T-Mobile the number one American wireless carrier. In 2017, T-Mobile was ranked #1 in Customer Service Satisfaction by Nielsen.

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T.E.D.D.

T.E.D.D. (Tornado Electrical Discharge Detection) is a public project to gather and publish RF (Radio Frequency) signals produced by tornadoes to help create additional warning and research instrumentation.

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Tactical Data Link

A Tactical Data Link (TDL) uses a data link standard in order to provide communication via radio waves or cable used by the U.S. armed forces and NATO nations.

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Tactical Vest Antenna System

Tactical Vest Antenna System (TVAS) is a type of wearable antenna designed for use by the United States Armed Forces.

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Taggant

A taggant can mean a radio frequency microchip used in automated identification and data capture (see RFID).

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Talisman UUV

The Talisman UUV is a fully autonomous unmanned mini-sub designed and made by BAE Systems.

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Tandem mass spectrometry

Tandem mass spectrometry, also known as MS/MS or MS2, involves multiple steps of mass spectrometry selection, with some form of fragmentation occurring in between the stages.

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Tawkon

tawkon (pronounced “talk on”) is a free smartphone application developed by Israeli-based startup tawkon LTD.

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Tee connector

A tee connector is an electrical connector that connects three cables together.

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Teledyne e2v

Teledyne e2v (previously known as e2v) is a global manufacturer with its headquarters in England, that designs, develops and manufactures technology systems and components in healthcare, life sciences, space, transportation, defence and security and industrial markets.

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Telegrapher's equations

The telegrapher's equations (or just telegraph equations) are a pair of coupled, linear differential equations that describe the voltage and current on an electrical transmission line with distance and time.

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Television

Television (TV) is a telecommunication medium used for transmitting moving images in monochrome (black and white), or in colour, and in two or three dimensions and sound.

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Television channel

A television channel is a broadcast frequency or virtual number over which a television station or television network is distributed.

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Television in the United States

Television is one of the major mass media of the United States.

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Television network

A television network is a telecommunications network for distribution of television program content, whereby a central operation provides programming to many television stations or pay television providers.

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Television transmitter

A television transmitter is a device which broadcasts an electromagnetic signal to the television receivers.

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Telit

Telit Communications PLC is a global provider of wireless machine to machine (M2M) technology and value-added services including connectivity cloud and PaaS Application Enablement Services headquartered in London, UK.

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Terahertz metamaterial

A terahertz metamaterial is a class of composite metamaterials designed to interact at terahertz (THz) frequencies.

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TerraNet AB

TerraNet AB is a company that delivers mobile telephony and data services via a peer-to-peer mobile mesh network of handsets and light infrastructure.

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Tesla coil

A Tesla coil is an electrical resonant transformer circuit designed by inventor Nikola Tesla in 1891.

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Test loop translator

A test loop translator (TLT) is a type of radio frequency converter or heterodyne, used to translate between uplink and downlink segments (generally in the same band), to allow for "loop-back" testing and calibration of a satellite ground station without the need to interface with the satellite.

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The European Radio Astronomy Club

The European Radio Astronomy club (ERAC) is Europe's only group coordinating the work of radio astronomers to jointly use radio waves to study the universe at radio wavelengths.

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The Future of Ideas

The Future of Ideas: The Fate of the Commons in a Connected World (2001) is a book by Lawrence Lessig, at the time of writing a professor of law at Stanford Law School, who is well known as a critic of the extension of the copyright term in US.

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Theremin

The theremin (--> originally known as the ætherphone/etherphone, thereminophone or termenvox/thereminvox) is an electronic musical instrument controlled without physical contact by the thereminist (performer).

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Thermal relief

A thermal relief pad, thermal pad or simply thermal, is a printed circuit board (PCB) pad connected to a copper pour using a thermal connection.

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Thiele/Small parameters

Thiele/Small parameters (commonly abbreviated T/S, or TSP) are a set of electromechanical parameters that define the specified low frequency performance of a loudspeaker driver.

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Time from NPL (MSF)

The Time from NPL is a radio signal broadcast from the Anthorn Radio Station near Anthorn, Cumbria, which serves as the United Kingdom's national time reference.

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Timeline of global surveillance disclosures (2013–present)

This timeline of global surveillance disclosures from 2013 to the present day is a chronological list of the global surveillance disclosures that began in 2013.

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Timeline of kidney cancer

This is a timeline of kidney cancer, describing especially major discoveries and advances in treatment of the disease.

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TINA (program)

Toolkit for Interactive Network Analysis (TINA) is a SPICE-based electronics design and training software by the Hungarian company DesignSoft of Budapest.

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TO-92

The TO-92 is a widely used style of semiconductor package mainly used for transistors.

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Tonsillectomy

Tonsillectomy is a surgical procedure in which both palatine tonsils (hereafter called "tonsils") are removed from a recess in the side of the pharynx called the tonsillar fossa.

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Trainphone

Trainphone was the Pennsylvania Railroad's system for voice communication between train crews on moving trains and with dispatchers, tower operators and similar.

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Transformational Satellite Communications System

The Transformational Satellite Communications System (TSAT) program was a United States Department of Defense (DOD) program sponsored by the U.S. Air Force for a secure, high-capacity global communications network serving the Department of Defense, NASA and the United States Intelligence Community (IC).

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Transformer

A transformer is a static electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

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Transformer types

A variety of types of electrical transformer are made for different purposes.

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Transistor

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.

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Transmission line

In communications and electronic engineering, a transmission line is a specialized cable or other structure designed to conduct alternating current of radio frequency, that is, currents with a frequency high enough that their wave nature must be taken into account.

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Transmitter

In electronics and telecommunications, a transmitter or radio transmitter is an electronic device which produces radio waves with an antenna.

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Transmitter power output

In radio transmission, transmitter power output (TPO) is the actual amount of power (in watts) of radio frequency (RF) energy that a transmitter produces at its output.

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Transmitter station

A transmitter station or transmission facility is an installation used for transmitting radio frequency signals for wireless communication, broadcasting, microwave link, mobile telephone or other purposes.

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Transponder

In telecommunication, a transponder can be one of two types of devices.

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Transposer

In broadcasting, a transposer or translator is a device in or beyond the service area of a radio or television station transmitter that rebroadcasts signals to receivers which can’t properly receive the signals of the transmitter because of a physical obstruction (like a hill).

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Transurethral needle ablation of the prostate

Transurethral needle ablation (also called TUNA or transurethral radiofrequency ablation) is a technique that uses low energy radio frequency delivered through two needles to ablate excess prostate tissue.

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Transverter

;In radio engineering: a transverter is a radio frequency device that consists of an upconverter and a downconverter in one unit.

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Trapped ion quantum computer

A trapped ion quantum computer is one proposed approach to a large-scale quantum computer.

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Traveling-wave tube

A traveling-wave tube (TWT, pronounced "twit") or traveling-wave tube amplifier (TWTA, pronounced "tweeta") is a specialized vacuum tube that is used in electronics to amplify radio frequency (RF) signals in the microwave range.

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Trench warfare

Trench warfare is a type of land warfare using occupied fighting lines consisting largely of military trenches, in which troops are well-protected from the enemy's small arms fire and are substantially sheltered from artillery.

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Triode

A triode is an electronic amplifying vacuum tube (or valve in British English) consisting of three electrodes inside an evacuated glass envelope: a heated filament or cathode, a grid, and a plate (anode).

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Triple quadrupole mass spectrometer

A triple quadrupole mass spectrometer (TQMS), is a tandem mass spectrometer consisting of two quadrupole mass analyzers in series, with a (non-mass-resolving) radio frequency (RF)–only quadrupole between them to act as a cell for collision-induced dissociation.

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True RMS converter

When measuring the value of an alternating current signal it is often necessary to convert the signal into a direct current signal of equivalent value which is known as the root mean square (RMS) value.

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Trunked radio system

A trunked radio system is two-way radio system that uses a control channel to automatically direct radio traffic.

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Tunable metamaterial

A tunable metamaterial is a metamaterial with a variable response to an incident electromagnetic wave.

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Tuner (radio)

A tuner is a subsystem that receives radio frequency (RF) transmissions like radio broadcasts and converts the selected carrier frequency and its associated bandwidth into a fixed frequency that is suitable for further processing, usually because a lower frequency is used on the output.

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TurboGrafx-16

The TurboGrafx-16 Entertainment SuperSystem, known in Japan and France as the, is a home video game console jointly developed by Hudson Soft and NEC Home Electronics, released in Japan on October 30, 1987 and in the United States on August 29, 1989.

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TurkSat-3USat

TurkSat-3USat is a Turkish communications nanosatellite developed by the and of Istanbul Technical University (ITU) in collaboration with the Türksat company along with Turkish Amateur Satellite Technology Organization (TAMSAT).

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TV tuner card

A TV tuner card is a kind of television tuner that allows television signals to be received by a computer.

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TV-band device

TV band devices or TVBDs are unlicensed radio frequency devices operating in the vacant channels or white spaces between US television channels in the range of 54 to 698 MHz.

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Twin Quasar

The Twin Quasar (also known as Twin QSO, Double Quasar, SBS 0957+561, TXS 0957+561, Q0957+561 or QSO 0957+561 A/B), was discovered in 1979 and was the first identified gravitationally lensed object.

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Twin-lead

Twin-lead cable is a two-conductor flat cable used as a balanced transmission line to carry radio frequency (RF) signals.

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Two-dimensional nuclear magnetic resonance spectroscopy

Two-dimensional nuclear magnetic resonance spectroscopy (2D NMR) is a set of nuclear magnetic resonance spectroscopy (NMR) methods which give data plotted in a space defined by two frequency axes rather than one.

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Types of radio emissions

The International Telecommunication Union uses an internationally agreed system for classifying radio frequency signals.

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U-70 (synchrotron)

U-70 (У-70) is a proton synchrotron with a final energy of 70 GeV, built in 1967 at the Institute for High Energy Physics in Protvino (near Serpukhov, Russia).

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U-NII

The Unlicensed National Information Infrastructure (U-NII) radio band is part of the radio frequency spectrum used by IEEE-802.11a devices and by many wireless ISPs.

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U.S. Military connector specifications

Connectors used by U.S. Department of Defense were originally developed in the 1930s for severe aeronautical and tactical service applications, and the Type "AN" (Army-Navy) series set the standard for modern military circular connectors.

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Ultra high frequency

Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one decimeter.

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Ultrasonic grating

An ultrasonic grating is a type of diffraction grating produced by interfering ultrasonic waves in a medium altering the physical properties of the medium, and hence the refractive index, in a grid-like pattern.

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Ultrasound research interface

An ultrasound research interface (URI) is a software tool loaded onto a diagnostic clinical ultrasound device which provides functionality beyond typical clinical modes of operation.

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Umtech

Umtech Incorporated., also known as the VideoBrain Computer Company, was an early entrant in the personal computer market that developed, manufactured, and marketed the first computer, VideoBrain, sold in department stores.

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UMTS frequency bands

The UMTS frequency bands are radio frequencies used by third generation (3G) wireless Universal Mobile Telecommunications System networks.

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Unbalanced line

In electrical engineering, an unbalanced line is a transmission line, often coaxial cable, whose conductors have unequal impedances with respect to ground; as opposed to a balanced line.

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Unintentional radiator

An unintentional radiator or incidental radiator is any device which creates radio frequency energy within itself, which is then unintentionally radiated from the device.

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United States 2008 wireless spectrum auction

The United States 700 MHz FCC wireless spectrum auction, officially known as Auction 73, was started by the Federal Communications Commission (FCC) on January 24, 2008 for the rights to operate the 700 MHz radio frequency band in the United States.

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Universal remote

A universal remote is a remote control that can be programmed to operate various brands of one or more types of consumer electronics devices.

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University of Cape Town

The University of Cape Town (UCT) is a public research university located in Cape Town in the Western Cape province of South Africa.

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US Radar

US Radar is a manufacturer and distributor of Surface Penetrating Radar (SPR), also known as ground penetrating radar (GPR), systems.

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V850

V850 is the trademark name for a 32-bit RISC CPU architecture of Renesas Electronics for embedded microcontrollers, introduced in early 90's by NEC and still being developed as of 2018.

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Vacuum tube

In electronics, a vacuum tube, an electron tube, or just a tube (North America), or valve (Britain and some other regions) is a device that controls electric current between electrodes in an evacuated container.

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Valens (company)

Valens Semiconductor is an Israeli Fabless manufacturing company providing semiconductor solutions for the development of HDBaseT devices.

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Valve amplifier

A valve amplifier or tube amplifier is a type of electronic amplifier that uses vacuum tubes to increase the amplitude or power of a signal.

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Valve RF amplifier

A valve RF amplifier (UK and Aus.) or tube amplifier (U.S.), is a device for electrically amplifying the power of an electrical radio frequency signal.

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Valve transmitters

Most high power transmitter amplifiers are of valve construction because of the high power required.

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Van Eck phreaking

Van Eck phreaking is a form of eavesdropping in which special equipment is used to pick up side-band electromagnetic emissions from electronics devices that correlate to hidden signals or data for the purpose of recreating these signals or data in order to spy on the electronic device.

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Variable capacitor

A variable capacitor is a capacitor whose capacitance may be intentionally and repeatedly changed mechanically or electronically.

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Variable-frequency oscillator

A variable frequency oscillator (VFO) in electronics is an oscillator whose frequency can be tuned (i.e., varied) over some range.

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VDM-1

The Processor Technology VDM-1, for Video Display Module, was the first video card for S-100 bus computers.

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Verizon Fios

Verizon Fios, also known as Fios by Verizon, is a bundled Internet access, telephone, and television service that operates over a fiber-optic communications network with over 5 million customers in nine U.S. states.

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Very high frequency

Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten to one meter.

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Very low frequency

Very low frequency or VLF is the ITU designation for radio frequencies (RF) in the range of 3 to 30 kilohertz (kHz), corresponding to wavelengths from 100 to 10 kilometers, respectively.

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Very-small-aperture terminal

A very small aperture terminal (VSAT) is a two-way satellite ground station with a dish antenna that is smaller than 3.8 meters.

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VHDL-AMS

VHDL-AMS is a derivative of the hardware description language VHDL (IEEE standard 1076-1993).

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Via fence

A via fence, also called a picket fence, is a structure used in planar electronic circuit technologies to improve isolation between components which would otherwise be coupled by electromagnetic fields.

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Viavi Solutions

VIAVI Solutions, formerly part of JDS Uniphase (JDSU), is a San Jose, California-based network test, measurement and assurance technology company.

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Video modulation

Video modulation is a strategy of transmitting video signal in the field of radio modulation and television technology.

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Voice-activated radio-dispatched alarm

A voice-activated radio-dispatched alarm, or VARDA-alarm, is a type of burglar alarm that, when activated or "tripped", broadcasts the type of the alarm and the transmitter location over the local police radio frequency using a pre-recorded audio message.

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Voltage multiplier

Villard cascade voltage multiplier. A voltage multiplier is an electrical circuit that converts AC electrical power from a lower voltage to a higher DC voltage, typically using a network of capacitors and diodes.

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Voltage-controlled oscillator

A microwave (12–18nbspGHz) voltage-controlled oscillator A voltage-controlled oscillator (VCO) is an electronic oscillator whose oscillation frequency is controlled by a voltage input.

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Voluntary Control Council for Interference by Information Technology Equipment

The Voluntary Control Council for Interference by Information Technology Equipment or VCCI is the Japanese body governing RF emissions (i.e. electromagnetic interference) standards.

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Vudu

Vudu, Inc. is an American content delivery and media technology company responsible for Vudu-branded interactive media services and devices.

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WAAV, Inc.

WAAV, Inc., formerly Omniwav Mobile, Inc., manufactures and sells mobile broadband cellular routers.

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Wafer fabrication

Wafer fabrication is a procedure composed of many repeated sequential processes to produce complete electrical or photonic circuits.

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WANN-CD

WANN-CD is a class-A low-power, digital TV station broadcasting on physical TV channel 29, virtual channel 32, and formerly as WANN-CA on analog 32 in metro Atlanta.

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Warren G. Harding

Warren Gamaliel Harding (November 2, 1865 – August 2, 1923) was an American politician who served as the 29th President of the United States from 1921 until his death in 1923.

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WaveBird Wireless Controller

The WaveBird Wireless Controller is a radio frequency (RF) based wireless controller manufactured for the Nintendo GameCube video game console.

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Waveguide rotary joint

A waveguide rotary joint is used in microwave communications to connect two different types of RF waveguides.

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WBZY

WBZY FM 105.3 ("105-3 El Patrón") is a radio station that plays Regional Mexican music.

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WCBS (AM)

WCBS (880 AM, "WCBS Newsradio 880") is a radio station licensed to New York City and is owned and operated by Entercom.

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WDCI-LD

WDCI-LD is a low-power television station that is licensed in Chicago, Illinois.

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WFXS-DT

WFXS-DT was a Fox-affiliated television station licensed to Wittenberg, Wisconsin, United States and serving north-central Wisconsin, including Wausau and Rhinelander.

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WGEN-TV

WGEN-TV, virtual and VHF digital channel 8, is an Estrella TV owned-and-operated television station licensed to Key West, Florida, United States.

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Wheel Impact phase detection

Wheel Impact Phase Detection (WIPD) is an internationally patented electronic wheel impact and wheel flat seismic rail sensing method developed primarily for the North American railroad industry.

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White spaces (radio)

In telecommunications, white spaces refer to frequencies allocated to a broadcasting service but not used locally.

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Whole Earth Blazar Telescope

The Whole Earth Blazar Telescope (WEBT) is an international consortium of astronomers created in 1997, with the aim to study a particular category of Active Galactic Nuclei (AGN) called blazars, which are characterized by strong and fast brightness variability, on time scales down to hours or less.

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Wide-bandgap semiconductor

Wide-bandgap semiconductors (WBG or WBGS) are semiconductor materials which have a relatively large band gap compared to typical semiconductors.

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Wilkinson power divider

In the field of microwave engineering and circuit design, the Wilkinson Power Divider is a specific class of power divider circuit that can achieve isolation between the output ports while maintaining a matched condition on all ports.

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William Perry

William James Perry (born October 11, 1927) is an American mathematician, engineer, and businessman who was the United States Secretary of Defense from February 3, 1994, to January 23, 1997, under President Bill Clinton.

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WiMAX MIMO

WiMAX MIMO refers to the use of Multiple-input multiple-output communications (MIMO) technology on WiMAX, which is the technology brand name for the implementation of the standard IEEE 802.16.

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Wingless Electromagnetic Air Vehicle

The Wingless Electromagnetic Air Vehicle (WEAV) is a heavier than air flight system in development at the Florida Center For Advanced Aero-Propulsion (FCAAP) at Florida State University, funded by the Air Force Office of Scientific Research.

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Winlink

Winlink, also known as the Winlink 2000 Network, is a worldwide radio messaging system that uses amateur-band radio frequencies to provide radio interconnection services that include email with attachments, position reporting, weather bulletins, emergency relief communications, and message relay.

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Wireless access point

20018 In computer networking, a wireless access point (WAP), or more generally just access point (AP), is a networking hardware device that allows a Wi-Fi device to connect to a wired network.

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Wireless electronic devices and health

The World Health Organization (WHO) has researched electromagnetic fields (EMFs) and their alleged effects on public health, concluding that such exposures within recommended limits do not produce any known adverse health effect.

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Wireless keyboard

A wireless keyboard is a computer keyboard that allows the user to communicate with computers, tablets, or laptops with the help of radio frequency (RF), infrared (IR) or Bluetooth technology.

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Wireless power transfer

Wireless power transfer (WPT), wireless power transmission, wireless energy transmission, or electromagnetic power transfer is the transmission of electrical energy without wires as a physical link.

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Wireless Set No. 19

The Wireless Set No.

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WiTrack

A WiTrack is a 3-D motion tracking sensor that is capable of monitoring human body movements.This sensor is able to serve three main purposes, such functions being the following: turning on/off home appliances, tracking a lethal fall, and improving gaming experience.

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WJR

WJR (760 AM) is a radio station in Detroit, Michigan, United States.

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WOCH-CD

WOCH-CD was a class A television station in Chicago, Illinois that was an affiliate of the action and adventure network Charge!.

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WOCK-CD

WOCK-CD, virtual channel 13 (VHF digital channel 4), is a low-powered, Class A independent television station licensed to Chicago, Illinois, United States.

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Woodward effect

The Woodward effect, also referred to as a Mach effect, is part of a hypothesis proposed by James F. Woodward in 1990.

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WPHA-CD

WPHA-CD, virtual channel 38 (38 UHF RF) is an independent Digital Class A television station in the Philadelphia market.

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WRDA (FM)

WRDA (105.7 FM) – branded Alt 105.7 – is a commercial radio station licensed to Canton, Georgia, broadcasting an alternative rock format.

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WSAW-TV

WSAW-TV is a CBS-affiliated television station licensed to Wausau, Wisconsin, United States and serving north-central Wisconsin, including Rhinelander.

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WSRV

WSRV (97.1 FM; "97.1 The River") is a rock-leaning classic-hits–formatted radio station that plays music from the 1960s, 1970s, and 1980s.

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WTBY-TV

WTBY-TV, channel 54 (UHF digital channel 23), is a television station licensed to Jersey City, New Jersey, United States, owned by the Trinity Broadcasting Network and serving the New York City television market.

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WURH-CD

WURH-CD is a class-A digital LPTV station in Miami, Florida on channel 25, owned by South Florida PBS, Inc.

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WYGA-CD

WYGA-CD is a low-power television class A station serving Atlanta, Georgia.

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WZAW-LD

WZAW-LD is a low-powered, Fox-affiliated television station licensed to Wausau, Wisconsin, United States and serving north-central Wisconsin, including Rhinelander.

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WZBT

WZBT (91.1 FM) is a radio station licensed to Gettysburg College, located in Gettysburg, Pennsylvania, United States.

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X band

The X band is the designation for a band of frequencies in the microwave radio region of the electromagnetic spectrum.

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X10 (industry standard)

X10 is a protocol for communication among electronic devices used for home automation (domotics).

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XE8000

The XE8000 series is a low-power microcontroller family from XEMICS (now a business unit of Semtech).

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XG Technology

xG Technology, Inc. is a developer of technology for wireless communications and spectrum sharing.

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XIM, Inc.

Xtra Information Management Incorporated (XIM, Inc.) is an IT consulting, software and system integration provider headquartered in San Francisco, with 8 offshore development centers in Eastern Europe.

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Yaesu FT-817

The Yaesu FT-817 is one of the smallest MF/HF/VHF/UHF multimode general-coverage amateur radio transceivers.

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Yagi–Uda antenna

A Yagi–Uda antenna, commonly known as a Yagi antenna, is a directional antenna consisting of multiple parallel elements in a line, usually half-wave dipoles made of metal rods.

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Yoram Harth

Yoram Harth (Hebrew: יורם הרט; born 27 August 1958) is an Israeli dermatologist and inventor.

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Zehlendorf bei Oranienburg

Zehlendorf is a village belonging to the city Oranienburg in Brandenburg.

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Zero reference pulse

Zero reference pulse or Zero pulse is an artificially produced pulse in a professional television receiver imitating no radio frequency case for modulation index measurements in analogue TV transmitters.

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Zune 30

The Zune 30 is a portable media player developed by Microsoft, and the first hardware device in Microsoft's Zune brand.

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ZX80

The Sinclair ZX80 is a home computer brought to market in 1980 by Science of Cambridge Ltd.

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10,000

10,000 (ten thousand) is the natural number following 9,999 and preceding 10,001.

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10BROAD36

10BROAD36 is an obsolete computer network standard in the Ethernet family.

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152 (number)

152 (one hundred fifty-two) is the natural number following 151 and preceding 153.

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172 (number)

172 (one hundred seventy-two) is the natural number following 171 and preceding 173.

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1942 in aviation

This is a list of aviation-related events from 1942.

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2-meter band

The 2-meter amateur radio band is a portion of the VHF radio spectrum, comprising frequencies stretching from 144 MHz to 148 MHz in International Telecommunication Union region (ITU) Regions 2 (North and South America plus Hawaii) and 3 (Asia and Oceania) and from 144 MHz to 146 MHz in ITU Region 1 (Europe, Africa, and Russia).

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2010–11 Ivorian crisis

The 2010–11 Ivorian crisis was a political crisis in Ivory Coast which began after Laurent Gbagbo, the President of Ivory Coast since 2000, was proclaimed the winner of the Ivorian election of 2010, the first election in the country in 10 years.

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2015 TB145

is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately in diameter.

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2182 kHz

The radio frequency 2182 kHz is one of the international calling and distress frequencies for maritime radiocommunication in a frequency band allocated to the mobile service on primary basis, exclusively for distress and calling operations.

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300-page iPhone bill

A 300-page iPhone bill from AT&T Mobility mailed in a box was the subject of a viral video made by YouTube personality Justine Ezarik, best known as iJustine, which became an Internet meme in August 2007.

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3C 279

3C 279 (also known as 4C–05.55, NRAO 413, and PKS 1253–05) is an optically violent variable quasar (OVV), which is known in the astronomical community for its variations in the visible, radio, and x-ray bands.

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576i

576i is a standard-definition video mode originally used for broadcast television in most countries of the world where the utility frequency for electric power distribution is 50 Hz.

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6AK5

The 6AK5 vacuum tube is a miniature 7-pin sharp-cutoff pentode used as RF or IF amplifier especially in high-frequency wide-band applications at frequencies up to 400 MHz.

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807 (vacuum tube)

The 807 is a beam tetrode vacuum tube, widely used in audio- and radio-frequency power amplifier applications.

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845 (vacuum tube)

The 845 power triode is a radio transmitting vacuum tube which can also be used as an audio amplifier and modulation tube.

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R F, R.F., R.f., RF, RF energy, RF signal, RF spectrum, RF stage, Radio Frequencies (table), Radio Frequency, Radio frequemcy, Radio frequencies, Radio frequencies and wavelengths, Radio frequency communication, Radio frequency spectrum, Radio-frequency, Radio-frequency communication, Radio-frequency spectrum, Radiofrequency, Radiowave, Rf wave, Rf., Wireless frequency.

References

[1] https://en.wikipedia.org/wiki/Radio_frequency