DocumentCode
2672314
Title
A Wideband, Backshort-Tunable Second Harmonic W-Band Gunn-Oscillator
Author
Barth, H.
fYear
1981
fDate
15-19 June 1981
Firstpage
334
Lastpage
337
Abstract
Today W-Band (75...110 GHz) Gunn-oscillators are mostly built as 2nd harmonic oscillators. Because the fundamental frequency is below cutoff of the waveguide system, a backshort affects the output frequency only slightly. For the same reason, power combining and varactor tuning is extremely difficult. This paper presents design and performance of a more than 15 GHz backshort tunable 2nd harmonic 90 GHz oscillator. Using a common waveguide cavity, designed for both the fundamental and the 2nd harmonic frequency, this oscillator is easily backshort and varactor tunable. It is also well suited for "in line" power combiners. Results for a three diode combiner are given. Finally, a varactor tuned 2 diode combiner with a tuning range of 1.5 GHz is presented.
Keywords
Capacitance; Cutoff frequency; Diodes; Injection-locked oscillators; Power generation; Rectangular waveguides; Resonance; Tuning; Varactors; Wideband;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Symposium Digest, 1981 IEEE MTT-S International
Conference_Location
Los Angeles, CA, USA
ISSN
0149-645X
Type
conf
DOI
10.1109/MWSYM.1981.1129916
Filename
1129916
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