self-heterodynen.adj.

Brit.

/ˌsɛlfˈhɛt(ə)rədʌɪn/, U.S.

/ˌsɛlfˈhɛdərəˌdaɪn/

Origin: Formed within English, by derivation. Etymons: self- prefix, heterodyne n.

Etymology: < self- prefix + heterodyne n. With the use as adjective compare earlier heterodyne adj. Compare also slightly later autoheterodyne n. and adj.

Originally Radio. Later also in the context of laser and optical communications technologies.

†A. n.

A heterodyne radio receiver or circuit in which the part used for the detection of the signal also functions as the local oscillator. Obsolete.

ΘΚΠ

society > communication > telecommunication > radio communications > radio equipment > [noun] > radio set > receiver > types of

crystal receiver1910

heterodyne1915

self-heterodyne1915

crystal set1921

crystal radio1922

superheterodyne1922

superhet1924

battery-receiver1928

battery-set1930

mobile unit1961

1915 H. J. Round in Year-bk Wireless Telegr. & Teleph. 582 These combined transmitter and receiver sets are useful for telegraphy, as the receiver is a ‘self heterodyne’ by slightly altering the adjustment.

1916 Proc. IRE 4 264 I am fairly familiar with the regenerative audion and its use as a self-heterodyne.

1924 Radio Broadcast July 203/1 In view of our knowledge of the self-heterodyne, it appears quite obvious to perform the first rectification by means of a self-heterodyne oscillator and thereby save a tube.

B. adj.

Designating a heterodyne radio receiver or circuit in which the part used for the detection of the signal also functions as the local oscillator; (also) relating to or employing such a receiver or circuit. In later use also: designating 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.

ΚΠ

1917 Proc. IRE 5 145 In self-heterodyne circuits of the regenerative type there are..two methods of amplification.

1927 R. F. Yates Everyman's Guide to Radio II. xi. 247/1 Regeneration..provides a convenient means..for picking up telephone carrier waves by employing the self-heterodyne method.

1988 T. Okoshi & K. Kikuchi Coherent Optical Fiber Communications iii. 87 We derive a general formula relating the FM noise spectrum of the light source to the lineshape determined by the delayed self heterodyne method.

2015 V. J. Urick et al. Fund. Microwave Photonics iii. 88 The self-heterodyne technique is often employed for characterization of lasers used in microwave photonics.

This entry has been updated (OED Third Edition, January 2018; most recently modified version published online March 2022).

单词	self-heterodyne
释义	self-heterodynen.adj. Brit. /ˌsɛlfˈhɛt(ə)rədʌɪn/, U.S. /ˌsɛlfˈhɛdərəˌdaɪn/ Origin: Formed within English, by derivation. Etymons: self- prefix, heterodyne n. Etymology: < self- prefix + heterodyne n. With the use as adjective compare earlier heterodyne adj. Compare also slightly later autoheterodyne n. and adj. Originally Radio. Later also in the context of laser and optical communications technologies. †A. n. A heterodyne radio receiver or circuit in which the part used for the detection of the signal also functions as the local oscillator. Obsolete. ΘΚΠ society > communication > telecommunication > radio communications > radio equipment > [noun] > radio set > receiver > types of crystal receiver1910 heterodyne1915 self-heterodyne1915 crystal set1921 crystal radio1922 superheterodyne1922 superhet1924 battery-receiver1928 battery-set1930 mobile unit1961 1915 H. J. Round in Year-bk Wireless Telegr. & Teleph. 582 These combined transmitter and receiver sets are useful for telegraphy, as the receiver is a ‘self heterodyne’ by slightly altering the adjustment. 1916 Proc. IRE 4 264 I am fairly familiar with the regenerative audion and its use as a self-heterodyne. 1924 Radio Broadcast July 203/1 In view of our knowledge of the self-heterodyne, it appears quite obvious to perform the first rectification by means of a self-heterodyne oscillator and thereby save a tube. B. adj. Designating a heterodyne radio receiver or circuit in which the part used for the detection of the signal also functions as the local oscillator; (also) relating to or employing such a receiver or circuit. In later use also: designating 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. ΚΠ 1917 Proc. IRE 5 145 In self-heterodyne circuits of the regenerative type there are..two methods of amplification. 1927 R. F. Yates Everyman's Guide to Radio II. xi. 247/1 Regeneration..provides a convenient means..for picking up telephone carrier waves by employing the self-heterodyne method. 1988 T. Okoshi & K. Kikuchi Coherent Optical Fiber Communications iii. 87 We derive a general formula relating the FM noise spectrum of the light source to the lineshape determined by the delayed self heterodyne method. 2015 V. J. Urick et al. Fund. Microwave Photonics iii. 88 The self-heterodyne technique is often employed for characterization of lasers used in microwave photonics. This entry has been updated (OED Third Edition, January 2018; most recently modified version published online March 2022). < n.adj.1915
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