论文信息 - Arrays of superconducting tunnel junctions as low‐noise 10‐GHz mixers

Arrays of superconducting tunnel junctions as low‐noise 10‐GHz mixers

Quasiparticle mixing (biasing at the gap voltage) was studied in arrays of small Pb‐O‐Pb tunnel junctions. Coherent mixing at 9 GHz gave a conversion loss as low as −5.8 dB and a single sideband mixer noise temperature of 10–40 K. The optimal conversion efficiency was obtained where the bias current microwave response was maximal. The arrays of junctions were rugged, and gave a good impedance match to external circuitry.

S. Rudner | Tord Claeson | T. Claeson | Staffan Rudner

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