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Development and demonstration of high-average power W-band gyro-amplifiers for radar applications

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12 Author(s)
Blank, M. ; Microwave Power Products Div., Commun. & Power Industries, Palo Alto, CA, USA ; Felch, K. ; James, B.G. ; Borchard, P.
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The results of a focused program to develop high-power W-band gyro-amplifiers, which culminated in the demonstration of record average output powers from amplifiers in this band, are described. Following an experimental and theoretical study of low-duty prototype amplifiers, two high-average power devices were designed, built, and demonstrated. The first high-average power amplifier achieved 10.1-kW average output power at 33% efficiency in the TE0.1 mode at 93.8 GHz. The instantaneous bandwidth was 420 MHz and the saturated gain at the 10.1-kW point was 32 dB. The second high-average power gyroklystron, designed for improved bandwidth, demonstrated 10.2-kW average power at 31% efficiency with 700-MHz instantaneous bandwidth and 33-dB saturated gain. The measured results of the low-duty prototype amplifiers and the high-average power gyroklystrons are described in detail. In addition, theoretically predicted results for a high-average-power W-band gyrotwystron amplifier, which is currently in construction, are presented.

Published in:

Plasma Science, IEEE Transactions on  (Volume:30 ,  Issue: 3 )

Date of Publication:

Jun 2002

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