REACTIONS; *SOLAR ENERGY CONVERSION; *SYSTEM EFFECTIVENESS; COST ANALYSIS; ELECTROCHEMISTRY; HYDROGEN PRODUCTION; SEMICONDUCTORS (MATERIALS); SOLAR COLLECTORS Subject Classification: 7544 Energy Production °< Conv ers i an (19 75 -) COSATI Code: 1OA Conversion Techniques Millimetric wave frequency converter using Gunn-effect di ode. Abstract On1y. RADCHENKO, A. F. ; MALYSHEV, I. V. Joint Publications Research Service, Arlington, Va. Corp. Source Code: J 1957394 In its USSR Rept.: Electron, and Elec. Eng. (JPRSUEE-84-006) p 46 (SEE N84-32580 22-31). May 1984. Translation Note: Transl. into ENGLISH from Izv. Vyssh. Ucheb. Zaved.: Radioelektron. (Kiev), v. 26, no. 10, Oct. 1983 p 45-51. Language: Eng 1 i sh . Country of Origin: U.S.S.R.. Country of Publication: U n i t e d S t a t e s Document Type: JOURNAL ARTICLE; TRANSLATION Most documents available from AIAA Technical Library Other Availability: NT IS HC A04 Journal Announcement: ST AR8422 The frequency conversion characteristics of Gunn-effect diodes operating in the negative-conductance mode in the millimetric-wave range? are calculated in the small-signal approximation on the basis of two phenomenological equations, one for the mean energy of random electron motion and one for the mean electron drift velocity. The mixer is represented by an equiva1ent circuit, assuming a uniform frequency characteristic and a near1y linear phase characteristic of the active diode element with its pass bands limited by ideal filters. An experimental study was made, its resulting confirming the results of theoretical analysis. A microwave oscillator with a Gunn-effeet diode was used as the heterodyne, with the frequency varied from 26 to 38 GHz and the power regulated by means of an attenuator before being transmitted through a ferrite diode, a circulator, d a waveguide? switch to the mixer. A standard oscillator with calibrated output served as the source of signal power and the latter was transmitted to the mixer through a calibrating attenuator and a directional coupler. Diodes with high doping level and diodes with low doping level were found to behave differently, in terms of the conversion efficiency as a function of the heterodyne power, the maximum conversion efficiency being higher and occurring at a lower heterodyne power in the latter case. (Author) Descriptors: *FREQUENCY CONVERTERS; *GUNN DIODES; *GUNN EFFECT; *MILL IMETER WAVES; CALIBRATING; COMPUTATION; ENERGY CONVERSION EFFICIENCY; HETERODYNING Subject Classification: 7576 Solid-State Physics (1975-) New directions in linear accelerators. JAMESON, R. A.
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