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A novel monolithic balanced switching low noise amplifier

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6 Author(s)
Lo, D.C.W. ; Electron. Syst. & Technol. Div., TRW Inc., Redondo Beach, CA, USA ; Wang, H. ; Allen, B.R. ; Dow, G.S.
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We report a monolithic novel balanced switching low-noise amplifier for use as a low-noise broadband switch or 180/spl deg/ phase shifter for application in microwave and millimeter wave control circuits. Each arm of the balanced amplifier consists of a two-stage low noise amplifier cascaded with a reflected phase shifter. By controlling the reflected phase shifters, the balanced switching low-noise amplifier exhibits two on states and two off states with an average on-off isolation of >20 dB within 5 GHz bandwidth. The two on states show an average gain of 7 dB with 180/spl deg/ phase difference from 80 to 100 GHz and an average noise figure of 6 dB from 92 to 96 GHz. These results are best data ever reported for a switch or 180/spl deg/ phase shifter at W-band.<>

Published in:

Microwave Symposium Digest, 1994., IEEE MTT-S International

Date of Conference:

23-27 May 1994