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Extremely high frequency

Index 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). [1]

84 relations: Active Denial System, Advanced microwave sounding unit, Air force, Amsterdam Airport Schiphol, Astronomy, Atacama Large Millimeter Array, Atmosphere, Attenuation, Cellular network, Channel capacity, Close-in weapon system, Defense Electronics (magazine), Diffraction, Diffuse reflection, Doppler effect, Drop (liquid), Electromagnetic shielding, Electromagnetic spectrum, Fading, Far infrared, Federal Communications Commission, Fiber-optic communication, Fire-control radar, Free-space path loss, Full body scanner, Geometrical optics, Gigabit, Glass production, Hertz, Intensity (physics), Inter-satellite service, International Telecommunication Union, Internet access, Ionosphere, Jagadish Chandra Bose, Jersey City, New Jersey, Journal of Infrared, Millimeter, and Terahertz Waves, K band (NATO), Ka band, Kitt Peak, Knife-edge effect, L band (NATO), Las Vegas, Line-of-sight propagation, Luneburg lens, M band (NATO), Mesosphere, Metre, Microwave, Millimeter wave scanner, ..., Mineral wool, Multipath propagation, Oxygen, Paper mill, Personal area network, Plastics extrusion, Point-to-multipoint communication, Point-to-point (telecommunications), Radar, Radar gun, Radio astronomy, Radio frequency, Radio spectrum, Radio wave, Rain fade, Remote sensing, Scattering, Soviet Union, Special sensor microwave/imager, Spectral line, Super high frequency, Surface wave, Terahertz gap, Terahertz radiation, Transportation Security Administration, Tulsa International Airport, V band, W band, Water vapor, Wavelength, Wi-Fi, Wireless Gigabit Alliance, WirelessHD, 5G. Expand index (34 more) »

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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Advanced microwave sounding unit

The advanced microwave sounding unit (AMSU) is a multi-channel microwave radiometer installed on meteorological satellites.

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Air force

An air force, also known in some countries as an aerospace force or air army, is in the broadest sense, the national military branch that primarily conducts aerial warfare.

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Amsterdam Airport Schiphol

Amsterdam Airport Schiphol, known informally as Schiphol (Luchthaven Schiphol), is the main international airport of the Netherlands.

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Astronomy

Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.

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Atacama Large Millimeter Array

The Atacama Large Millimeter/submillimeter Array (ALMA) is an astronomical interferometer of radio telescopes in the Atacama Desert of northern Chile.

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Atmosphere

An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body.

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Attenuation

In physics, attenuation or, in some contexts, extinction is the gradual loss of flux intensity through a medium.

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Cellular network

A cellular network or mobile network is a communication network where the last link is wireless.

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Channel capacity

Channel capacity, in electrical engineering, computer science and information theory, is the tight upper bound on the rate at which information can be reliably transmitted over a communication channel.

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Close-in weapon system

A close-in weapon system (CIWS), is a point-defense weapon system for detecting and destroying short-range incoming missiles and enemy aircraft which have penetrated the outer defenses, typically mounted shipboard in a naval capacity.

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Defense Electronics (magazine)

Defense Electronics (formerly RF Design) is a Penton Media trade magazine that covers radio frequency design.

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Diffraction

--> Diffraction refers to various phenomena that occur when a wave encounters an obstacle or a slit.

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Diffuse reflection

Diffuse reflection is the reflection of light or other waves or particles from a surface such that a ray incident on the surface is scattered at many angles rather than at just one angle as in the case of specular reflection.

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Doppler effect

The Doppler effect (or the Doppler shift) is the change in frequency or wavelength of a wave in relation to observer who is moving relative to the wave source.

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Drop (liquid)

A drop or droplet is a small column of liquid, bounded completely or almost completely by free surfaces.

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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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Electromagnetic spectrum

The electromagnetic spectrum is the range of frequencies (the spectrum) of electromagnetic radiation and their respective wavelengths and photon energies.

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Fading

In wireless communications, fading is variation or the attenuation of a signal with various variables.

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Far infrared

Far infrared (FIR) is a region in the infrared spectrum of electromagnetic radiation.

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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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Fiber-optic communication

Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through an optical fiber.

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Fire-control radar

A fire-control radar (FCR) is a radar that is designed specifically to provide information (mainly target azimuth, elevation, range and range rate) to a fire-control system in order to direct weapons such that they hit a target.

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Free-space path loss

In telecommunication, free-space path loss (FSPL) is the attenuation of radio energy between the feedpoints of two antennas that results from the combination of the receiving antenna's capture area plus the obstacle free, line-of-sight path through free space (usually air).

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Full body scanner

A full-body scanner is a device that detects objects on a person's body for security screening purposes, without physically removing clothes or making physical contact.

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Geometrical optics

Geometrical optics, or ray optics, describes light propagation in terms of rays.

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Gigabit

The gigabit is a multiple of the unit bit for digital information or computer storage.

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Glass production

Glass production involves two main methods – the float glass process that produces sheet glass, and glassblowing that produces bottles and other containers.

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Hertz

The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.

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Intensity (physics)

In physics, intensity is the power transferred per unit area, where the area is measured on the plane perpendicular to the direction of propagation of the energy.

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Inter-satellite service

Inter-satellite service (also: inter-satellite radiocommunication service) is – according to Article 1.22 of the International Telecommunication Union´s (ITU) Radio Regulations (RR) – defined as «A radiocommunication service providing links between artificial satellites.»; See also.

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International Telecommunication Union

The International Telecommunication Union (ITU; Union Internationale des Télécommunications (UIT)), originally the International Telegraph Union (Union Télégraphique Internationale), is a specialized agency of the United Nations (UN) that is responsible for issues that concern information and communication technologies.

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Internet access

Internet access is the ability of individuals and organizations to connect to the Internet using computer terminals, computers, and other devices; and to access services such as email and the World Wide Web.

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Ionosphere

The ionosphere is the ionized part of Earth's upper atmosphere, from about to altitude, a region that includes the thermosphere and parts of the mesosphere and exosphere.

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Jagadish Chandra Bose

Sir Jagadish Chandra Bose, CSI, CIE, FRS (30 November 1858 – 23 November 1937), also spelled Jagdish and Jagadis, was a polymath, physicist, biologist, biophysicist, botanist and archaeologist, and an early writer of science fiction.

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Jersey City, New Jersey

Jersey City is the second-most-populous city in the U.S. state of New Jersey, after Newark.

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Journal of Infrared, Millimeter, and Terahertz Waves

The Journal of Infrared, Millimeter, and Terahertz Waves is a monthly peer-reviewed scientific journal published by Springer Science+Business Media.

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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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Ka band

The Ka band (pronounced as either "kay-ay band" or "ka band") is a portion of the microwave part of the electromagnetic spectrum defined as frequencies in the range 26.5–40 gigahertz (GHz), i.e. wavelengths from slightly over one centimeter down to 7.5 millimeters.

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Kitt Peak

Kitt Peak (Ioligam) is a mountain in the U.S. state of Arizona, and at is the highest point in the Quinlan Mountains.

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Knife-edge effect

In electromagnetic wave propagation, the knife-edge effect or edge diffraction is a redirection by diffraction of a portion of the incident radiation that strikes a well-defined obstacle such as a mountain range or the edge of a building.

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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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Las Vegas

Las Vegas (Spanish for "The Meadows"), officially the City of Las Vegas and often known simply as Vegas, is the 28th-most populated city in the United States, the most populated city in the state of Nevada, and the county seat of Clark County.

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Line-of-sight propagation

Line-of-sight propagation is a characteristic of electromagnetic radiation or acoustic wave propagation which means waves travel in a direct path from the source to the receiver.

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Luneburg lens

A Luneburg lens (originally Lüneburg lens, often incorrectly spelled Luneberg lens) is a spherically symmetric gradient-index lens.

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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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Mesosphere

The mesosphere (from Greek mesos "middle" and sphaira "sphere") is the layer of the Earth's atmosphere that is directly above the stratosphere and directly below the thermosphere.

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Metre

The metre (British spelling and BIPM spelling) or meter (American spelling) (from the French unit mètre, from the Greek noun μέτρον, "measure") is the base unit of length in some metric systems, including the International System of Units (SI).

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Microwave

Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between and.

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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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Mineral wool

Mineral wool is a general name for fiber materials that are formed by spinning or drawing molten minerals (or "synthetic minerals" such as slag and ceramics).

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Multipath propagation

In wireless telecommunications, multipath is the propagation phenomenon that results in radio signals reaching the receiving antenna by two or more paths.

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Oxygen

Oxygen is a chemical element with symbol O and atomic number 8.

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Paper mill

A paper mill is a factory devoted to making paper from vegetable fibres such as wood pulp, old rags and other ingredients.

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Personal area network

A personal area network (PAN) is a computer network for interconnecting devices centered on an individual person's workspace.

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Plastics extrusion

Plastics extrusion is a high-volume manufacturing process in which raw plastic is melted and formed into a continuous profile.

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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 (telecommunications)

In telecommunications, a point-to-point connection refers to a communications connection between two Communication endpoints or nodes.

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Radar

Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects.

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Radar gun

A radar speed gun (also radar gun and speed gun) is a device used to measure the speed of moving objects.

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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 frequency

Radio frequency (RF) refers to oscillatory change in voltage or current in a circuit, waveguide or transmission line in the range extending from around twenty thousand times per second to around three hundred billion times per second, roughly between the upper limit of audio and the lower limit of infrared.

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Radio spectrum

The radio spectrum is the part of the electromagnetic spectrum with frequencies from 3 Hz to 3 000 GHz (3 THz).

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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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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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Remote sensing

Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object and thus in contrast to on-site observation.

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Scattering

Scattering is a general physical process where some forms of radiation, such as light, sound, or moving particles, are forced to deviate from a straight trajectory by one or more paths due to localized non-uniformities in the medium through which they pass.

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Soviet Union

The Soviet Union, officially the Union of Soviet Socialist Republics (USSR) was a socialist state in Eurasia that existed from 1922 to 1991.

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Special sensor microwave/imager

The Special Sensor Microwave/Imager (SSM/I) is a seven-channel, four-frequency, linearly polarized passive microwave radiometer system.

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Spectral line

A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies.

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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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Surface wave

In physics, a surface wave is a mechanical wave that propagates along the interface between differing media.

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Terahertz gap

The terahertz gap is an engineering term for a band of frequencies in the terahertz region of the electromagnetic spectrum between radio waves and infrared light for which practical technologies for generating and detecting the radiation do not exist.

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Terahertz radiation

Terahertz radiation – also known as submillimeter radiation, terahertz waves, tremendously high frequency (THF), T-rays, T-waves, T-light, T-lux or THz – consists of electromagnetic waves within the ITU-designated band of frequencies from 0.3 to 3 terahertz (THz; 1012 Hz).

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Transportation Security Administration

The Transportation Security Administration (TSA) is an agency of the U.S. Department of Homeland Security that has authority over the security of the traveling public in the United States.

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Tulsa International Airport

Tulsa International Airport is a civil-military airport five miles (8 km) northeast of downtown Tulsa, in Tulsa County, Oklahoma.

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V band

The V band ("vee-band") is a standard designation by the Institute of Electrical and Electronic Engineers (IEEE) for a band of frequencies in the microwave portion of the electromagnetic spectrum ranging from 40 to 75 gigahertz (GHz).

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W band

The W band of the microwave part of the electromagnetic spectrum ranges from 75 to 110 GHz, wavelength ≈2.7–4 mm.

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Water vapor

No description.

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Wavelength

In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.

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Wi-Fi

Wi-Fi or WiFi is technology for radio wireless local area networking of devices based on the IEEE 802.11 standards.

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Wireless Gigabit Alliance

The Wireless Gigabit Alliance (WiGig) was a trade association that developed and promoted the adoption of multi-gigabit per second speed wireless communications technology operating over the unlicensed 60 GHz frequency band.

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WirelessHD

WirelessHD, also known as UltraGig, is a proprietary standard owned by Silicon Image (originally SiBeam) for wireless transmission of high-definition video content for consumer electronics products.

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5G

5G is a marketing term for some new mobile technologies.

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Extremely High Frequency, G band (IEEE), Millimeter band, Millimeter wave, Millimeter wave guidance, Millimeter-wave, Millimetre Wave, Millimetre band, Millimetre wave, Millimetric wave, Mm wave, Mm-wave, MmW, MmWave.

References

[1] https://en.wikipedia.org/wiki/Extremely_high_frequency

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