Low-noise parametric amplification at 35 GHz in a single Josephson tunnel junction

Jesper Mygind, Niels Falsig Pedersen, O. H. Sørensen, B. Dueholm, M. T. Levinsen

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Abstract

Parametric amplification at 35 GHz has been obtained using a single Josephson tunnel junction as the active element. The amplifier was operated in the singly quasidegenerate mode with a pump frequency at 70 GHz. The noise temperature was measured and found correlated with the gain. At the highest gain achieved, 11.6 dB, the noise temperature was 400 K. The noise temperature was reduced considerably by decreasing the gain. At 8 and 4 dB we found 165±25 K and 50±30 K, respectively. Applied Physics Letters is copyrighted by The American Institute of Physics.
Original languageEnglish
JournalApplied Physics Letters
Volume35
Issue number1
Pages (from-to)91-93
ISSN0003-6951
DOIs
Publication statusPublished - 1979

Bibliographical note

Copyright (1979) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

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