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

doi:10.1063/1.90906

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

Technical University of Denmark

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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 language	English
Journal	Applied Physics Letters
Volume	35
Issue number	1
Pages (from-to)	91-93
ISSN	0003-6951
DOIs	https://doi.org/10.1063/1.90906
Publication status	Published - 1979

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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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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.",

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AU - Sørensen, O. H.

AU - Dueholm, B.

AU - Levinsen, M. T.

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N2 - 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.

AB - 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.

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

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