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A 850 GHz SIS receiver employing silicon micro-machining technologyA 850 GHz superconductor-insulator-superconductor (SIS) heterodyne receiver which uses a radiofrequency tuned niobium tunnel junction fabricated on a 1 micron thick silicon nitrate membrane, is reported. From video and heterodyne measurements, it was calculated that the niobium film loss in the radiofrequency matching network is about 6.8 dB at 822 GHz. These results are approximately a factor of two higher than the theoretical loss predicted by the Mattis-Bardeen theory in the extreme anomalous limit. The junction design and the receiver configuration are described, including the mixer block, the membrane construction and the cooled optics. The performance tests using a Fourier transform spectrometer to measure the response of the radiofrequency matching network, and the SIS simulations of the receiver response to cold and hot loads, the infrared noise contribution and the overall mixer conversion efficiency, are reported. It is concluded that the receiver response is limited by the absorption loss in the radiofrequency matching network.
Document ID
19970018431
Document Type
Conference Paper
Authors
Kooi, J. W. (California Inst. of Tech. Pasadena, CA United States)
Pety, J. (California Inst. of Tech. Pasadena, CA United States)
Schaffer, P. L. (California Inst. of Tech. Pasadena, CA United States)
Phillips, T. G. (California Inst. of Tech. Pasadena, CA United States)
Bumble, B. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
LeDuc, H. G. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Walker, C. K. (Arizona Univ. Tucson, AZ United States)
Date Acquired
August 17, 2013
Publication Date
December 1, 1996
Subject Category
Spacecraft Instrumentation
Funding Number(s)
CONTRACT_GRANT: NSF AST-93-13929
CONTRACT_GRANT: NAGw-107
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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