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Proceedings Paper

W-band HEMT-based power-amplifier module for millimeter-wave LO multipliers
Author(s): Todd C. Gaier; Imran Mehdi; Jacob W. Kooi; B. H. Fujiwara; Richard Lai
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Paper Abstract

We report on the performance of power amplifiers as local oscillator drivers for millimeter and submillimeter-wave receivers. A MMIC power amplifier based on 0.1 micron GaAs HEMT technology on 50 micron thick substrate has been packaged in a waveguide block and characterized. Output power in excess of 100 mW is demonstrated over 88 - 94 GHz with more power easily achievable. The noise properties of the MMIC amplifier in multiplied local oscillator chains are characterized in a low noise superconductor-insulator-superconductor mixer based heterodyne receiver. A 386 GHz SIS mixer was used to characterize noise temperature in a laboratory environment. A more sensitive measurement of noise contribution from the amplifier was performed on a 278 GHz mixer/receiver at the Caltech Submillimeter-Wave Observatory, during astronomical observations. It is concluded that the MMIC amplifier does not add additional significant noise to the radiometer system.

Paper Details

Date Published: 31 July 1998
PDF: 8 pages
Proc. SPIE 3357, Advanced Technology MMW, Radio, and Terahertz Telescopes, (31 July 1998); doi: 10.1117/12.317344
Show Author Affiliations
Todd C. Gaier, Jet Propulsion Lab. (United States)
Imran Mehdi, Jet Propulsion Lab. (United States)
Jacob W. Kooi, California Institute of Technology (United States)
B. H. Fujiwara, Jet Propulsion Lab. (United States)
Richard Lai, TRW, Inc. (United States)

Published in SPIE Proceedings Vol. 3357:
Advanced Technology MMW, Radio, and Terahertz Telescopes
Thomas G. Phillips, Editor(s)

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