W-band HEMT-based power-amplifier module for millimeter-wave LO multipliers

Todd C. Gaier; Imran Mehdi; Jacob W. Kooi; B. H. Fujiwara; Richard Lai

doi:10.1117/12.317344

31 July 1998 W-band HEMT-based power-amplifier module for millimeter-wave LO multipliers

Todd C. Gaier, Imran Mehdi, Jacob W. Kooi, B. H. Fujiwara, Richard Lai

Proceedings Volume 3357, Advanced Technology MMW, Radio, and Terahertz Telescopes; (1998) https://doi.org/10.1117/12.317344
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

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.

Citation Download Citation

Todd C. Gaier, Imran Mehdi, Jacob W. Kooi, B. H. Fujiwara, and Richard Lai "W-band HEMT-based power-amplifier module for millimeter-wave LO multipliers", Proc. SPIE 3357, Advanced Technology MMW, Radio, and Terahertz Telescopes, (31 July 1998); https://doi.org/10.1117/12.317344

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