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68 relations: All-pass filter, AM stereo, Antenna (radio), Antenna array, Audio crossover, Barkhausen–Kurz tube, Carrier-to-noise ratio, CDMA2000, Chirp compression, Circular polarization, Complex plane, Computer mouse, Coplanar waveguide, Costas loop, Doepfer A-100, Electrical impedance, Elliptical polarization, Extremely low frequency, Flight dynamics (fixed-wing aircraft), GPS signals, IEEE 1902.1, In-band on-channel, Index of wave articles, Inverse-square law, IQ (disambiguation), IQ imbalance, Isobaric loudspeaker, Linear encoder, List of trigonometric identities, List of vacuum tubes, Lock-in amplifier, Minimum-shift keying, Modulation sphere, Newton's rings, Numerically controlled oscillator, Optical flat, Optical phase space, Orthogonal frequency-division multiplexing, Parabolic antenna, Phase (waves), Phase splitter, Phaser (effect), Phasor, PMC Ltd., Power dividers and directional couplers, Quadrature, Quadrature amplitude modulation, Quadrature booster, Quadrature modulation, Radiation pattern, ..., Reflection (physics), Reflective array antenna, Rotating magnetic field, Salisbury screen, Satellite modem, Shortt–Synchronome clock, Shortwave radio receiver, Single-phase generator, Squeezed coherent state, Standing wave, Tap converter, Transformer types, Transmission line loudspeaker, Turnstile antenna, Twin-lead, Upfade, Vector signal analyzer, WWVH. Expand index (18 more) »
All-pass filter
An all-pass filter is a signal processing filter that passes all frequencies equally in gain, but changes the phase relationship among various frequencies.
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AM stereo
AM stereo is a term given to a series of mutually incompatible techniques for radio broadcasting stereo audio in the AM band in a manner that is compatible with standard AM receivers.
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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 array
An antenna array (or array antenna) is a set of multiple connected antennas which work together as a single antenna, to transmit or receive radio waves.
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Audio crossover
Audio crossovers are a type of electronic filter circuitry used in a range of audio applications, to split up an audio signal into two or more frequency ranges, so that the signals can be sent to drivers that are designed for different frequency ranges.
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Barkhausen–Kurz tube
The Barkhausen–Kurz tube, also called the retarding-field tube, reflex triode, B–K oscillator, and Barkhausen oscillator was a high frequency vacuum tube electronic oscillator invented in 1920 by German physicists Heinrich Georg Barkhausen and Karl Kurz.
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Carrier-to-noise ratio
In telecommunications, the carrier-to-noise ratio, often written CNR or C/N, is the signal-to-noise ratio (SNR) of a modulated signal.
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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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Chirp compression
The chirp pulse compression process transforms a long duration frequency-coded pulse into a narrow pulse of greatly increased amplitude.
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Circular polarization
In electrodynamics, circular polarization of an electromagnetic wave is a polarization state in which, at each point, the electric field of the wave has a constant magnitude but its direction rotates with time at a steady rate in a plane perpendicular to the direction of the wave.
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Complex plane
In mathematics, the complex plane or z-plane is a geometric representation of the complex numbers established by the real axis and the perpendicular imaginary axis.
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Computer mouse
A computer mouse is a hand-held pointing device that detects two-dimensional motion relative to a surface.
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Coplanar waveguide
Coplanar waveguide is a type of electrical planar transmission line which can be fabricated using printed circuit board technology, and is used to convey microwave-frequency signals.
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Costas loop
A Costas loop is a phase-locked loop (PLL) based circuit which is used for carrier frequency recovery from suppressed-carrier modulation signals (e.g. double-sideband suppressed carrier signals) and phase modulation signals (e.g. BPSK, QPSK).
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Doepfer A-100
The Doepfer A-100 is an analog modular synthesizer system introduced by German audio manufacturer Doepfer in 1995.
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Electrical impedance
Electrical impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied.
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Elliptical polarization
In electrodynamics, elliptical polarization is the polarization of electromagnetic radiation such that the tip of the electric field vector describes an ellipse in any fixed plane intersecting, and normal to, the direction of propagation.
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Extremely low frequency
Extremely low frequency (ELF) is the ITU designation for electromagnetic radiation (radio waves) with frequencies from 3 to 30 Hz, and corresponding wavelengths of 100,000 to 10,000 kilometers, respectively.
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Flight dynamics (fixed-wing aircraft)
Flight dynamics is the science of air vehicle orientation and control in three dimensions.
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GPS signals
Global Positioning System (GPS) satellites broadcast microwave signals to enable GPS receivers on or near the Earth's surface to determine location and time and derive velocity.
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IEEE 1902.1
The IEEE 1902.1-2009 standard is a wireless data communication protocol also known as RuBee, operates within the Low Frequency radio wave range of 30–900 kHz.
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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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Index of wave articles
This is a list of Wave topics.
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Inverse-square law
The inverse-square law, in physics, is any physical law stating that a specified physical quantity or intensity is inversely proportional to the square of the distance from the source of that physical quantity.
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IQ (disambiguation)
IQ or intelligence quotient is a score derived from one of several standardized tests designed to assess human intelligence.
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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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Isobaric loudspeaker
The Isobaric loudspeaker configuration was first introduced by Harry F. Olson in the early 1950s, and refers to systems in which two or more identical woofers (bass drivers) operate simultaneously, with a common body of enclosed air adjoining one side of each diaphragm.
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Linear encoder
A linear encoder is a sensor, transducer or readhead paired with a scale that encodes position.
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List of trigonometric identities
In mathematics, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables where both sides of the equality are defined.
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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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Lock-in amplifier
A lock-in amplifier is a type of amplifier that can extract a signal with a known carrier wave from an extremely noisy environment.
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Minimum-shift keying
In digital modulation, minimum-shift keying (MSK) is a type of continuous-phase frequency-shift keying that was developed in the late 1950s and 1960s.
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Modulation sphere
The Modulation sphere or M-space formulation is a scheme or theory representing the system of effects of phase modulation and amplitude modulation as applied together on a carrier wave.
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Newton's rings
Newton's rings is a phenomenon in which an interference pattern is created by the reflection of light between two surfaces—a spherical surface and an adjacent touching flat surface.
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Numerically controlled oscillator
A numerically controlled oscillator (NCO) is a digital signal generator which creates a synchronous (i.e. clocked), discrete-time, discrete-valued representation of a waveform, usually sinusoidal.
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Optical flat
An optical flat is an optical-grade piece of glass lapped and polished to be extremely flat on one or both sides, usually within a few tens of nanometres (billionths of a meter).
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Optical phase space
In quantum optics, an optical phase space is a phase space in which all quantum states of an optical system are described.
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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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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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Phase (waves)
Phase is the position of a point in time (an instant) on a waveform cycle.
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Phase splitter
A phase splitter is a device that separates a signal into multiple phases (or polarities).
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Phaser (effect)
A phaser is an electronic sound processor used to filter a signal by creating a series of peaks and troughs in the frequency spectrum.
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Phasor
In physics and engineering, a phasor (a portmanteau of phase vector), is a complex number representing a sinusoidal function whose amplitude (A), angular frequency (ω), and initial phase (θ) are time-invariant.
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PMC Ltd.
The Professional Monitor Company Limited, better known as PMC, is a British loudspeaker manufacturer, established in 1991.
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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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Quadrature
Quadrature may refer to: In signal processing.
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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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Quadrature booster
A phase angle regulating transformer, phase angle regulator (PAR, American usage), phase-shifting transformer, phase shifter (West coast American usage), or quadrature booster (quad booster, British usage), is a specialised form of transformer used to control the flow of real power on three-phase electricity transmission networks.
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Quadrature modulation
Quadrature modulation is the general technique of combining two amplitude-modulated (DSB) carrier signals in such a way that the original amplitude modulations are separable, by coherent demodulation, at the receiver.
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Radiation pattern
In the field of antenna design the term radiation pattern (or antenna pattern or far-field pattern) refers to the directional (angular) dependence of the strength of the radio waves from the antenna or other source.
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Reflection (physics)
Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated.
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Reflective array antenna
In telecommunications and radar, a reflective array antenna is a class of directive antennas in which multiple driven elements are mounted in front of a flat surface designed to reflect the radio waves in a desired direction.
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Rotating magnetic field
A rotating magnetic field is a magnetic field that has moving polarities in which its opposite poles rotate about a central point or axis.
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Salisbury screen
The Salisbury screen was a way of reducing the reflection of radio waves from a surface.
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Satellite modem
A satellite modem or satmodem is a modem used to establish data transfers using a communications satellite as a relay.
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Shortt–Synchronome clock
The Shortt–Synchronome free pendulum clock was a complex precision electromechanical pendulum clock invented in 1921 by British railway engineer William Hamilton Shortt in collaboration with horologist Frank Hope-Jones, and manufactured by the Synchronome Co., Ltd.
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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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Single-phase generator
Single-phase generator (also known as single-phase alternator) is an alternating current electrical generator that produces a single, continuously alternating voltage.
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Squeezed coherent state
In physics, a squeezed coherent state is a quantum state that is usually described by two non-commuting observables having continuous spectra of eigenvalues.
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Standing wave
In physics, a standing wave – also known as a stationary wave – is a wave which oscillates in time but whose peak amplitude profile does not move in space.
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Tap converter
The tap converter is a variation on the cycloconverter, invented in 1981 by New York City electrical engineer Melvin Sandler and significantly functionally enhanced in 1982 through 1984 by graduate students Mariusz Wrzesniewski, Bruce David Wilner, and Eddie Fung.
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Transformer types
A variety of types of electrical transformer are made for different purposes.
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Transmission line loudspeaker
A transmission line loudspeaker is a loudspeaker enclosure design (topology) that uses an acoustic transmission line within the cabinet, compared to the simpler enclosures used by sealed (closed) or ported (bass reflex) designs.
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Turnstile antenna
A turnstile antenna, or crossed-dipole antenna, is a radio antenna consisting of a set of two identical dipole antennas mounted at right angles to each other and fed in phase quadrature; the two currents applied to the dipoles are 90° out of phase.
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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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Upfade
Upfade is the term used in radio communications to describe a situation where multipath conditions (in which signals travel from the transmitter to the receiving antenna by two or more paths) cause a radio signal to gain strength.
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Vector signal analyzer
A vector signal analyzer is an instrument that measures the magnitude and phase of the input signal at a single frequency within the IF bandwidth of the instrument.
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WWVH
WWVH is the callsign of the U.S. National Institute of Standards and Technology's shortwave radio time signal station in Kekaha, on the island of Kauai in the state of Hawaii.
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Redirects here:
I and Q, I and Q components, I-Q signal, IQ signal, In phase, Phase quadrature, Quadrature component, Quadrature phase.
References
[1] https://en.wikipedia.org/wiki/In-phase_and_quadrature_components
