期刊
APPLIED PHYSICS LETTERS
卷 82, 期 19, 页码 3266-3268出版社
AMER INST PHYSICS
DOI: 10.1063/1.1572970
关键词
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A series of five dc superconducting quantum interference devices (SQUIDs) have been operated as microstrip amplifiers at frequencies ranging from 2.2 to 7.4 GHz. In these devices, the signal is connected between the SQUID washer and coil, which acts as a microstrip resonator. The gain measured at 4.2 K ranged from 12+/-1 to 6+/-1 dB. The noise temperature of three devices at 4.2 K in the frequency range 2.2-4 GHz was between 1 and 2 K, and the saturation temperature was between 150 and 250 K. Applications of these devices include readout for axion detectors, and intermediate-frequency amplifiers for superconductor-insulator-superconductor and hot-electron bolometer mixers. (C) 2003 American Institute of Physics.
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