Correction of resonance frequency for RF amplifiers based on superconducting quantum interference device

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Low-noise amplifiers in the radio-frequency (RF) band based on the direct current (DC) superconducting quantum interference device (SQUID) can be used for quantum-limited measurements in precision physics experiments. For the prediction of peak-gain frequency of these amplifiers, we need a reliable design formula for the resonance frequency of the microstrip circuit. We improved the formula for the resonance frequency, determined by parameters of the DC SQUID and the input coil, and compared the design values with experimental values. The proposed formula showed much accurate results than the conventional formula. Minor deviation of the experimental results from the theory can be corrected by using the measured geometrical parameters of the input coil line.
Publisher
KOREA INST APPLIED SUPERCONDUCTIVITY & CRYOGENICS
Issue Date
2018-12
Language
English
Article Type
Article
Citation

PROGRESS IN SUPERCONDUCTIVITY AND CRYOGENICS, v.20, no.4, pp.6 - 10

ISSN
1229-3008
DOI
10.9714/psac.2018.20.4.006
URI
http://hdl.handle.net/10203/268502
Appears in Collection
PH-Journal Papers(저널논문)
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