heterodyne

The mixing of two electrical or acoustic signals to produce a third equal to either the sum of or the difference between their frequencies. For example, if a signal with a frequency of 1000 Hz were to be mixed with another signal of 600 Hz, besides the original two frequencies two new frequencies will be produced: 1600 Hz (1000 + 600), and 400 Hz (1000 − 600). Radar receivers are of the heterodyne type (as contrasted to the superregenerative type) because the very high radio frequencies used in radar are difficult to amplify. A target signal is heterodyned with a current of lower frequency produced by a klystron oscillator and the resulting intermediate-frequency signal can then be highly amplified for subsequent presentation or analysis.

Aviation dictionary. 2014.

Look at other dictionaries:

  • HÉTÉRODYNE — Quand deux ondes sinusoïdales de différentes fréquences sont mêlées ou superposées, l’amplitude de l’onde résultante varie avec une fréquence égale à la différence de leurs fréquences respectives. L’hétérodyne est l’appareil qui émet des ondes… …   Encyclopédie Universelle

  • heterodyne — [het′ər ōdīn΄] adj. [ HETERO + DYNE] designating or of the combination of two different radio frequencies to produce beats whose frequencies are equal to the sum or difference of the original frequencies vi. heterodyned, heterodyning to combine… …   English World dictionary

  • Heterodyne — This article is about waveform manipulation. For the use of the term in poetry, see Heterodyne (poetry). For the webcomic characters, see Girl Genius. Heterodyning is a radio signal processing technique invented in 1901 by Canadian inventor… …   Wikipedia

  • Heterodyne — Détection hétérodyne La détection hétérodyne consiste à transposer l énergie d une partie du spectre à plus basse fréquence (dite « intermédiaire ») avant de la détecter. Ce signal est mélangé sur un élément non linéaire rapide (par… …   Wikipédia en Français

  • Heterodyne — heterodinas statusas T sritis automatika atitikmenys: angl. heterodyne vok. Überlagerer, m; Heterodyne, f; Mischoszillator, m rus. гетеродин, m pranc. hétérodyne, f …   Automatikos terminų žodynas

  • Heterodyne — heterodinas statusas T sritis fizika atitikmenys: angl. heterodyne vok. Überlagerer, n; Heterodyne, f rus. гетеродин, m pranc. hétérodyne, f …   Fizikos terminų žodynas

  • heterodyne — /het euhr euh duyn /, adj., v., heterodyned, heterodyning. Radio. adj. 1. noting or pertaining to a method of changing the frequency of an incoming radio signal by adding it to a signal generated within the receiver to produce fluctuations or… …   Universalium

  • heterodyne — /ˈhɛtərədaɪn/ (say hetuhruhduyn), /ˈhɛtrə / (say hetruh ) adjective 1. denoting or relating to a method of receiving continuous wave radiotelegraph signals by impressing upon the continuous radiofrequency oscillations another set of… …   Australian English dictionary

  • heterodyne —   n. Radio, production of beats by superimposition of oscillations of slightly different frequency upon the waves being received; use of this beat frequency in radio reception; interference, especially whistle, due to heterodyne; v.i. produce… …   Dictionary of difficult words

  • heterodyne — 1. adjective Of, two oscillations, having two slightly different frequencies such that, when combined, they produce a beat 2. noun a) The beat so produced b) Either the sum or …   Wiktionary

  • heterodyne — het·er·o·dyne || hetÉ™rəʊdaɪn adj. consisting of or produced by combined radio waves n. detection technique used widely in radio which involves combining the measured wave with a wave of different frequency to produce frequencies equal to… …   English contemporary dictionary

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