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Operation of the SUPARAMP at 33 GHzA 9-mm degenerate parametric amplifier has been constructed using a linear series array of unbiased Josephson junctions as the active nonlinear element. A balanced diode mixer was used as a synchronous detector, with a single source serving both as the pump and as the mixer local oscillator. A stable net gain of 15 dB in an instantaneous bandwidth (FWHM) of 3.4 GHz has been achieved. A system noise temperature of 220 plus or minus 5 K (DSB) was measured with a SUPARAMP contribution of only 20 plus or minus 10 K. Output saturation has been observed. This complicates the interpretation of noise-temperature measurements and may render them upper limits. Comparison is made with the results of an earlier 3-cm SUPARAMP.
Document ID
19760050748
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Chiao, R. Y.
(California Univ. Berkeley, CA, United States)
Parrish, P. T.
(California, University Berkeley, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
June 1, 1976
Publication Information
Publication: Journal of Applied Physics
Volume: 47
Subject Category
Electronics And Electrical Engineering
Accession Number
76A33714
Funding Number(s)
CONTRACT_GRANT: NSF AST-72-05136
CONTRACT_GRANT: NGL-05-003-272
Distribution Limits
Public
Copyright
Other

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