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A G-band cryogenic MMIC heterodyne receiver module for astronomical applications

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10 Author(s)
Voll, P. ; Dept. of Phys., Stanford Univ., Stanford, CA, USA ; Samoska, L. ; Church, S. ; Lau, J.M.
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We report cryogenic noise temperature and gain measurements of a prototype heterodyne receiver module designed to operate in the atmospheric window centered on 150 GHz. The module utilizes MMIC InP HEMT amplifiers, a second harmonic mixer, and bandpass filters. Measurements show an average gain of 22 dB and an average noise temperature of 87 K over a 40 GHz band from 140 to 180 GHz when the module is cooled to 22 K. A spot noise temperature of 58 K was measured at 166 GHz and is a record for cryogenic noise from HEMT amplifiers. The compact housing features a split-block design that facilitates quick assembly and a condensed arrangement of the MMIC components and bias circuitry. DC feedthroughs and nano-miniature connectors also contribute to enabling the compact design, so that the total volume of the module is about 2.5 cm cubed.

Published in:

Microwave Conference (EuMC), 2011 41st European

Date of Conference:

10-13 Oct. 2011