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A Continuously Tunable 65--15-GHz Gunn Oscillator

Authors :
Richard Plambeck
J. E. Carlstrom
D. D. Thornton
Source :
IEEE Transactions on Microwave Theory and Techniques. 33:610-619
Publication Year :
1985
Publisher :
Institute of Electrical and Electronics Engineers (IEEE), 1985.

Abstract

A phase-locked second harmonic Gunn oscillator, mechanically tunable from 65 to 115 GHz, has been developed for use as a Iocal oscillator (LO) in millimeter radio astronomy. The oscillator's output power is greater than 2 mW over most of its operating range, and exceeds 10 mW from 80 to 102 GHz. Its frequency can be electronically tuned approximately +-200 MHz by varying the bias voltage on the Gunn diode it is phase locked by exploiting this bias tuning. The oscillator consists of a commercially available, packaged GaAs Gunn diode which is mounted in a coaxial resonator of adjustable length. Descriptions of the mechanical design and phase-lock circuit are given. Extensive experimental measurements of the tuning range and power output for oscillators with different resonator dimensions also are reported.

Details

ISSN :
00189480
Volume :
33
Database :
OpenAIRE
Journal :
IEEE Transactions on Microwave Theory and Techniques
Accession number :
edsair.doi...........2bf1e6ac882891f54e93b6147c3634ce
Full Text :
https://doi.org/10.1109/tmtt.1985.1133036