self-heterodyningn.
/ˌsɛlfˈhɛt(ə)rədʌɪnɪŋ/, U.S. /ˌsɛlfˈhɛdərəˌdaɪnɪŋ/ Originally Radio. Later also in the context of laser and optical communications technologies.
The production of heterodyne interference with an incoming radio signal by the oscillation of the detecting circuit itself; a method of radio signal reception that uses this. In later use also: a method used in laser or optical communications technology to measure the linewidth of the optical spectrum of an incoming beam, in which the beam is split and recombined with a modulated version of itself.
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society > communication > telecommunication > radio communications > [noun] > other methods or operations
quenchinga1300
high-frequency amplification1919
self-heterodyning1922
neutrodyning1924
preselection1924
1922 N.Y. Tribune 27 Aug. ii. 7/6 The zero beat adjustment..is the adjustment at the point where there is no self-heterodyning in your set, or between the set itself and the carrier of the transmitting station.
1970 U.S. Patent 3,544,806 2 Self-heterodyning of the diffracted laser beam is utilized.
2013 Electronics Lett. (Nexis) 49 The linewidth of the probe is measured by delayed self-heterodyning.
This entry has been updated (OED Third Edition, January 2018; most recently modified version published online March 2022).
self-heterodyningadj.
/ˌsɛlfˈhɛt(ə)rədʌɪnɪŋ/, U.S. /ˌsɛlfˈhɛdərəˌdaɪnɪŋ/ Originally Radio. Later also in the context of laser and optical communications technologies.
Of a radio receiver or circuit: that functions both as the signal detector and as the local oscillator. In later use also in laser or optical communications technology: that employs or involves the splitting and recombination of an incoming beam with a modulated version of itself, in order to measure the linewidth of its optical spectrum. Cf. self-heterodyne adj.
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1920 Jrnl. Inst. Electr. Engineers 58 240/2 A self-heterodyning cascade amplifier is, for some not obvious reason, much less subject to microphonic noises than is a single valve.
1929 R. L. Duncan & C. E. Drew Radio Telegr. & Teleph. xii. 344 The circuit is commonly known as a self-heterodyning detector because the tube functions both as an oscillator and detector.
1985 IEE Proc. J. 132 17/2 Preliminary linewidth measurements have also been performed on our devices,..by using a self heterodyning technique.
2015 S. Maier et al. in IEEE Radio & Wireless Symp. (RWS) 196 (title) Phase noise cancellation performance in self-heterodyning transceivers for wireless backhaul applications.
This entry has been updated (OED Third Edition, January 2018; most recently modified version published online March 2022).
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n.1922adj.1920