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Introduction of a DC Bias into a High-Q Superconducting Microwave Cavity



Rimberg J. Alex, Fei Chen, Adam J. Sirois, Raymond Simmonds


We report a technique for applying a dc voltage or current bias to the center conductor of a high-quality factor superconducting microwave cavity without significantly disturbing selected cavity modes. This is accomplished by incorporating dc bias lines into the cavity at specific locations. The measured S-matrix parameters of the system are in good agreement with theoretical predictions and simulations. We find that the quality factor of the cavity degrades by less than 1% under the application of a dc bias.
Applied Physics Letters


superconductivity, microwave resonator


Alex, R. , Chen, F. , Sirois, A. and Simmonds, R. (2011), Introduction of a DC Bias into a High-Q Superconducting Microwave Cavity, Applied Physics Letters, [online], (Accessed May 22, 2024)


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Created March 30, 2011, Updated October 12, 2021