Journal
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
Volume 21, Issue 3, Pages 452-455Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TASC.2010.2089403
Keywords
Directional coupler; microwave; passive microwave components; quadrature hybrid; quantum information; TRL calibration
Funding
- DARPA/MTO QuEST
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We report on the design, fabrication and testing of two superconducting passive microwave components, a quadrature hybrid and a 20 dB directional coupler. These components are designed to be integrated with superconducting qubits or Josephson parametric amplifiers and used in quantum information processing applications. For the coupler, we measure return loss and isolation >20 dB, and insertion loss <0.3 dB in a 2 GHz band around 6 GHz. For the hybrid performance, we measure isolation >20 dB and insertion loss <0.3 dB in a 10% band around 6.5 GHz. These values are within the design specifications of our application; however, we find a 7% difference between the designed and measured center frequency for the hybrid.
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