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

J. Mygind | Zendy; N. F. Pedersen | Zendy; O. H. Soerensen | Zendy; B. Dueholm | Zendy; Mogens T. Levinsen | Zendy

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

Author(s) -

J. Mygind,

N. F. Pedersen,

O. H. Soerensen,

B. Dueholm,

Mogens T. Levinsen

Publication year - 1979

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.90906

Subject(s) - noise (video) , josephson effect , amplifier , noise temperature , materials science , y factor , parametric statistics , tunnel junction , parametric oscillator , physics , noise figure , optoelectronics , condensed matter physics , optics , phase noise , superconductivity , quantum tunnelling , mathematics , statistics , cmos , artificial intelligence , computer science , image (mathematics)

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.

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