Fabrication of the Impedance-Matched Josephson Parametric Amplifier and the Study of the Gain Profile

  title={Fabrication of the Impedance-Matched Josephson Parametric Amplifier and the Study of the Gain Profile},
  author={Rui Yang and Hui Deng},
  journal={IEEE Transactions on Applied Superconductivity},
  • Rui YangH. Deng
  • Published 2 September 2019
  • Physics
  • IEEE Transactions on Applied Superconductivity
We designed and fabricated an impedance-matched Josephson parametric amplifier (JPA) working in the flux-pump mode for the broadband amplification of microwave signals. A simple fabrication method suitable for a small cleanroom was developed. We also studied the phase response, as well as the gain, as a function of signal frequency and pump power at various pump frequencies. The phase response can be explained with the behavior of the nonlinear Duffing oscillator. The observed decrease of the… 

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