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Superheterodyne receiver, the Glossary

99 relations: Admiralty (United Kingdom), Alexanderson alternator, All American Five, Alternating current, Alternator, American Radio Relay League, Amplitude modulation, Antenna (radio), Autodyne, Automatic gain control, AWA Technology Services, Band-pass filter, Baseband, Beat frequency oscillator, Cambridge University Press, Capacitive coupling, Carrier wave, Ceramic resonator, Continuous wave, Crystal filter, Decibel, Demodulation, Detector (radio), Direct-conversion receiver, Direction finding, Edwin Howard Armstrong, Electronic filter, Envelope detector, Ernst Alexanderson, Feedback, Filter (signal processing), Frequency mixer, H2X, Headphones, Heterodyne, IFF Mark II, Image response, Institution of Electrical Engineers, Intermediate frequency, LC circuit, Linear amplifier, Local oscillator, Low-pass filter, Lucien Lévy, Machine tool, McGraw Hill Education, Medium wave, Microprocessor, Modulation, Morse code, ... Expand index (49 more) »
History of radio technology
Receiver (radio)

Admiralty (United Kingdom)

The Admiralty was a department of the Government of the United Kingdom responsible for the command of the Royal Navy until 1964, historically under its titular head, the Lord High Admiral – one of the Great Officers of State.

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Alexanderson alternator

An Alexanderson alternator is a rotating machine, developed by Ernst Alexanderson beginning in 1904, for the generation of high-frequency alternating current for use as a radio transmitter. Superheterodyne receiver and Alexanderson alternator are history of radio technology and radio electronics.

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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. Superheterodyne receiver and All American Five are history of radio technology and radio electronics.

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Alternating current

Alternating current (AC) is an electric current that periodically reverses direction and changes its magnitude continuously with time, in contrast to direct current (DC), which flows only in one direction.

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Alternator

An alternator is an electrical generator that converts mechanical energy to electrical energy in the form of alternating current.

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American Radio Relay League

The American Radio Relay League (ARRL) is the largest membership association of amateur radio enthusiasts in the United States.

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Amplitude modulation

Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave.

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Antenna (radio)

In radio engineering, an antenna (American English) or aerial (British English) is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver. Superheterodyne receiver and antenna (radio) are radio electronics.

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Autodyne

The autodyne circuit was an improvement to radio signal amplification using the De Forest Audion vacuum tube amplifier.

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Automatic gain control

Automatic gain control (AGC) is a closed-loop feedback regulating circuit in an amplifier or chain of amplifiers, the purpose of which is to maintain a suitable signal amplitude at its output, despite variation of the signal amplitude at the input. Superheterodyne receiver and Automatic gain control are communication circuits.

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AWA Technology Services

AWA Technology Services, name based on former name Amalgamated Wireless (Australasia) Ltd, is an Australian provider for technology related services.

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Band-pass filter

A band-pass filter or bandpass filter (BPF) is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range.

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Baseband

In telecommunications and signal processing, baseband is the range of frequencies occupied by a signal that has not been modulated to higher frequencies.

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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. Superheterodyne receiver and beat frequency oscillator are communication circuits, electronic design and radio electronics.

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Cambridge University Press

Cambridge University Press is the university press of the University of Cambridge.

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Capacitive coupling

Capacitive coupling is the transfer of energy within an electrical network or between distant networks by means of displacement current between circuit(s) nodes, induced by the electric field.

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Carrier wave

In telecommunications, a carrier wave, carrier signal, or just carrier, is a periodic waveform (usually sinusoidal) that carries no information that has one or more of its properties modified (the called modulation) by an information-bearing signal (called the message signal or modulation signal) for the purpose of conveying information. Superheterodyne receiver and carrier wave are communication circuits.

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Ceramic resonator

A ceramic resonator is an electronic component consisting of a piece of a piezoelectric ceramic material with two or more metal electrodes attached.

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Continuous wave

A continuous wave or continuous waveform (CW) is an electromagnetic wave of constant amplitude and frequency, typically a sine wave, that for mathematical analysis is considered to be of infinite duration.

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Crystal filter

A crystal filter allows some frequencies to 'pass' through an electrical circuit while attenuating undesired frequencies.

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Decibel

The decibel (symbol: dB) is a relative unit of measurement equal to one tenth of a bel (B).

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Demodulation

Demodulation is extracting the original information-bearing signal from a carrier wave. Superheterodyne receiver and Demodulation are communication circuits, radio electronics and receiver (radio).

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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. Superheterodyne receiver and detector (radio) are radio electronics.

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Direct-conversion receiver

A direct-conversion receiver (DCR), also known as homodyne, synchrodyne, or zero-IF receiver, is a radio receiver design that demodulates the incoming radio signal using synchronous detection driven by a local oscillator whose frequency is identical to, or very close to the carrier frequency of the intended signal. Superheterodyne receiver and direct-conversion receiver are radio electronics and receiver (radio).

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Direction finding

Direction finding (DF), or radio direction finding (RDF), is the use of radio waves to determine the direction to a radio source.

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Edwin Howard Armstrong

Edwin Howard Armstrong (December 18, 1890 – February 1, 1954) was an American electrical engineer and inventor, who developed FM (frequency modulation) radio and the superheterodyne receiver system. Superheterodyne receiver and Edwin Howard Armstrong are radio electronics.

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Electronic filter

Electronic filters are a type of signal processing filter in the form of electrical circuits.

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Envelope detector

An envelope detector (sometimes called a peak detector) is an electronic circuit that takes a (relatively) high-frequency signal as input and outputs the envelope of the original signal. Superheterodyne receiver and envelope detector are communication circuits.

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Ernst Alexanderson

Ernst Frederick Werner Alexanderson (January 25, 1878 – May 14, 1975) was a Swedish-American electrical engineer, who was a pioneer in radio and television development.

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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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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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Frequency mixer

In electronics, a mixer, or frequency mixer, is an electrical circuit that creates new frequencies from two signals applied to it. Superheterodyne receiver and frequency mixer are communication circuits and radio electronics.

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H2X

H2X, officially known as the AN/APS-15, was an American ground scanning radar system used for blind bombing during World War II.

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Headphones

Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears.

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Heterodyne

A heterodyne is a signal frequency that is created by combining or mixing two other frequencies using a signal processing technique called heterodyning, which was invented by Canadian inventor-engineer Reginald Fessenden.

See Superheterodyne receiver and Heterodyne

IFF Mark II

IFF Mark II was the first operational identification friend or foe system.

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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 superheterodyne principle. Superheterodyne receiver and image response are radio electronics.

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Institution of Electrical Engineers

The Institution of Electrical Engineers (IEE) was a British professional organisation of electronics, electrical, manufacturing, and information technology professionals, especially electrical engineers.

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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. Superheterodyne receiver and intermediate frequency are radio electronics.

See Superheterodyne receiver and Intermediate frequency

LC circuit

An LC circuit, also called a resonant circuit, tank circuit, or tuned circuit, is an electric circuit consisting of an inductor, represented by the letter L, and a capacitor, represented by the letter C, connected together. Superheterodyne receiver and lC circuit are history of radio technology.

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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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Local oscillator

In electronics, a local oscillator (LO) is an electronic oscillator used with a mixer to change the frequency of a signal. Superheterodyne receiver and local oscillator are radio electronics.

See Superheterodyne receiver and Local oscillator

Low-pass filter

A low-pass filter is a filter that passes signals with a frequency lower than a selected cutoff frequency and attenuates signals with frequencies higher than the cutoff frequency.

See Superheterodyne receiver and Low-pass filter

Lucien Lévy

Lucien Lévy (11 March 1892 – 24 May 1965) was a French radio engineer and radio receiver manufacturer. Superheterodyne receiver and Lucien Lévy are history of radio technology.

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A machine tool is a machine for handling or machining metal or other rigid materials, usually by cutting, boring, grinding, shearing, or other forms of deformations.

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McGraw Hill Education

McGraw Hill is an American publishing company for educational content, software, and services for pre-K through postgraduate education.

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Medium wave

Medium wave (MW) is a part of the medium frequency (MF) radio band used mainly for AM radio broadcasting.

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Microprocessor

A microprocessor is a computer processor for which the data processing logic and control is included on a single integrated circuit (IC), or a small number of ICs.

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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 separate signal called the modulation signal that typically contains information to be transmitted.

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Morse code

Morse code is a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs.

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Neutrodyne

The Neutrodyne radio receiver, invented in 1922 by Louis Hazeltine, was a particular type of tuned radio frequency (TRF) receiver, in which the instability-causing inter-electrode capacitance of the triode RF tubes is cancelled out or "neutralized"US Patent No. Superheterodyne receiver and Neutrodyne are radio electronics and receiver (radio).

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Nonlinear system

In mathematics and science, a nonlinear system (or a non-linear system) is a system in which the change of the output is not proportional to the change of the input.

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NTSC

NTSC (from National Television Standards Committee) is the first American standard for analog television, published in 1941.

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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, frequency or both of electromagnetic radiation in the wavelength band of visible or infrared light.

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Penguin Books

Penguin Books Limited is a British publishing house.

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Pentagrid converter

The pentagrid converter is a type of radio receiving valve (vacuum tube) with five grids used as the frequency mixer stage of a superheterodyne radio receiver.

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Pentode

A pentode is an electronic device having five electrodes.

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Phase modulation

Phase modulation (PM) is a modulation pattern for conditioning communication signals for transmission.

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Phase-locked loop

A phase-locked loop or phase lock loop (PLL) is a control system that generates an output signal whose phase is fixed relative to the phase of an input signal. Superheterodyne receiver and phase-locked loop are communication circuits, electronic design and radio electronics.

See Superheterodyne receiver and Phase-locked loop

Product detector

A product detector is a type of demodulator used for AM and SSB signals. Superheterodyne receiver and product detector are communication circuits.

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Q factor

In physics and engineering, the quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is.

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Q multiplier

In electronics, a Q multiplier is a circuit added to a radio receiver to improve its selectivity and sensitivity. Superheterodyne receiver and q multiplier are radio electronics.

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QST

QST is a magazine for amateur radio enthusiasts, published by the American Radio Relay League (ARRL).

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Radar detector detector

A radar detector detector (RDD) is a device used by police or law enforcement in areas where radar detectors are declared illegal.

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Radio broadcasting

Radio broadcasting is the broadcasting of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience.

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Radio receiver

In radio communications, a radio receiver, also known as a receiver, a wireless, or simply a radio, is an electronic device that receives radio waves and converts the information carried by them to a usable form. Superheterodyne receiver and radio receiver are receiver (radio).

See Superheterodyne receiver and Radio receiver

RC circuit

A resistor–capacitor circuit (RC circuit), or RC filter or RC network, is an electric circuit composed of resistors and capacitors.

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RCA

The RCA Corporation was a major American electronics company, which was founded in 1919 as the Radio Corporation of America.

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Rectifier

A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction.

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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). Superheterodyne receiver and reflex receiver are history of radio technology, radio electronics and receiver (radio).

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Regenerative circuit

A regenerative circuit is an amplifier circuit that employs positive feedback (also known as regeneration or reaction). Superheterodyne receiver and regenerative circuit are radio electronics and receiver (radio).

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Reginald Fessenden

Reginald Aubrey Fessenden (October 6, 1866 – July 22, 1932) was a Canadian-born American inventor who received hundreds of patents in various fields, most notably ones related to radio and sonar.

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RF front end

In a radio receiver circuit, the RF front end, short for radio frequency front end, is a generic term for all the circuitry between a receiver's antenna input up to and including the mixer stage. Superheterodyne receiver and rF front end are radio electronics.

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Selectivity (radio)

Selectivity is a measure of the performance of a radio receiver to respond only to the radio signal it is tuned to (such as a radio station) and reject other signals nearby in frequency, such as another broadcast on an adjacent channel.

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Semiconductor

A semiconductor is a material that has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass.

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Shortwave radio

Shortwave radio is radio transmission using radio frequencies in the shortwave bands (SW).

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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. Superheterodyne receiver and single-sideband modulation are electronic design.

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Software-defined radio

Software-defined radio (SDR) is a radio communication system where components that conventionally have been implemented in analog hardware (e.g. mixers, filters, amplifiers, modulators/demodulators, detectors, etc.) are instead implemented by means of software on a computer or embedded system. Superheterodyne receiver and software-defined radio are radio electronics and receiver (radio).

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Spark-gap transmitter

A spark-gap transmitter is an obsolete type of radio transmitter which generates radio waves by means of an electric spark. Superheterodyne receiver and spark-gap transmitter are history of radio technology and radio electronics.

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Spycatcher

Spycatcher: The Candid Autobiography of a Senior Intelligence Officer (1987) is a memoir written by Peter Wright, former MI5 officer and Assistant Director, and co-author Paul Greengrass.

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Superheterodyne receiver

A superheterodyne receiver, often shortened to superhet, is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) which can be more conveniently processed than the original carrier frequency. Superheterodyne receiver and superheterodyne receiver are communication circuits, electronic design, history of radio technology, radio electronics and receiver (radio).

See Superheterodyne receiver and Superheterodyne receiver

Superheterodyne transmitter

Superheterodyne transmitter is a radio or TV transmitter which uses an intermediate frequency signal in addition to radio frequency signal.

See Superheterodyne receiver and Superheterodyne transmitter

Surface acoustic wave

A surface acoustic wave (SAW) is an acoustic wave traveling along the surface of a material exhibiting elasticity, with an amplitude that typically decays exponentially with depth into the material, such that they are confined to a depth of about one wavelength.

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Tetrode

A tetrode is a vacuum tube (called valve in British English) having four active electrodes.

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Transformer

In electrical engineering, a transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits.

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Transmitter

In electronics and telecommunications, a radio transmitter or just transmitter (often abbreviated as XMTR or TX in technical documents) is an electronic device which produces radio waves with an antenna with the purpose of signal transmission up to a radio receiver.

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Triode

A triode is an electronic amplifying vacuum tube (or thermionic 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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Tuned amplifier

A tuned amplifier is an electronic amplifier which includes bandpass filtering components within the amplifier circuitry.

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Tuned radio frequency receiver

A tuned radio frequency receiver (or TRF receiver) is a type of radio receiver that is composed of one or more tuned radio frequency (RF) amplifier stages followed by a detector (demodulator) circuit to extract the audio signal and usually an audio frequency amplifier. Superheterodyne receiver and tuned radio frequency receiver are history of radio technology, radio electronics and receiver (radio).

See Superheterodyne receiver and Tuned radio frequency receiver

Vacuum tube

A vacuum tube, electron tube, valve (British usage), or tube (North America) is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.

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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. Superheterodyne receiver and variable-frequency oscillator are communication circuits, electronic design and radio electronics.

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Varicap

In electronics, a varicap diode, varactor diode, variable capacitance diode, variable reactance diode or tuning diode is a type of diode designed to exploit the voltage-dependent capacitance of a reverse-biased p–n junction.

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Volt

The volt (symbol: V) is the unit of electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI).

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Walter H. Schottky

Walter Hans Schottky (23 July 1886 – 4 March 1976) was a German physicist who played a major early role in developing the theory of electron and ion emission phenomena, invented the screen-grid vacuum tube in 1915 while working at Siemens, co-invented the ribbon microphone and ribbon loudspeaker along with Dr.

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Westinghouse Electric Corporation

The Westinghouse Electric Corporation (later CBS Corporation) was an American manufacturing company founded in 1886 by George Westinghouse and headquartered in Pittsburgh, Pennsylvania.

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Wiley (publisher)

John Wiley & Sons, Inc., commonly known as Wiley, is an American multinational publishing company that focuses on academic publishing and instructional materials.

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1

1 (one, unit, unity) is a number representing a single or the only entity.

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References

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

Also known as Double conversion (superhet), Double conversion superhet, Double conversion superheterodyne, Double super, Double-conversion (superhet), Double-conversion superhet, Double-conversion superheterodyne, Dual conversion (superhet), Dual conversion superhet, Dual conversion superheterodyne, Dual-conversion (superhet), Dual-conversion superhet, Dual-conversion superheterodyne, Heterodyne receiver, Image frequency, Mirror frequency, Super Heterodyne receiver, Superhet, Superheterodyne, Superheterodyne Receivers, Superheterodyne Reception, Supersonic Heterodyne, Supersonic heterodine receiver, Supersonic heterodyne receiver, Triple conversion (superhet), Triple conversion superhet, Triple conversion superheterodyne, Triple-conversion (superhet), Triple-conversion superhet, Triple-conversion superheterodyne.

, Neutrodyne, Nonlinear system, NTSC, Operation RAFTER, Optical heterodyne detection, Penguin Books, Pentagrid converter, Pentode, Phase modulation, Phase-locked loop, Product detector, Q factor, Q multiplier, QST, Radar detector detector, Radio broadcasting, Radio receiver, RC circuit, RCA, Rectifier, Reflex receiver, Regenerative circuit, Reginald Fessenden, RF front end, Selectivity (radio), Semiconductor, Shortwave radio, Single-sideband modulation, Software-defined radio, Spark-gap transmitter, Spycatcher, Superheterodyne receiver, Superheterodyne transmitter, Surface acoustic wave, Tetrode, Transformer, Transmitter, Triode, Tuned amplifier, Tuned radio frequency receiver, Vacuum tube, Variable capacitor, Variable-frequency oscillator, Varicap, Volt, Walter H. Schottky, Westinghouse Electric Corporation, Wiley (publisher), 1.

Superheterodyne receiver, the Glossary

Table of Contents

See also

History of radio technology

Receiver (radio)

References