Externally pumped millimeter-wave Josephson-junction parametric amplifier

M.T Levinsen, Niels Falsig Pedersen, Ole Sørensen, Benny Dueholm, Jesper Mygind

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A unified theory of the singly and doubly degenerate Josephson-junction parametric amplifier is presented. Experiments with single junctions on both amplifier modes at frequencies 10, 35, and 70 GHz are discussed. Low-noise temperature (∼100 K, single sideband (SSB)) and reasonable gain (∼8 dB) were obtained at 35 GHz in the singly degenerate mode. On the basis of the theory and experiments, a general procedure for optimizing junction parameters is discussed and illustrated by the specific design of a 100-GHz amplifier.
Original languageEnglish
JournalI E E E Transactions on Electron Devices
Issue number10
Pages (from-to)1928-1934
Publication statusPublished - 1980

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