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Simulation and measurement of a Ka-band HTS MMIC Josephson junction mixer

Zhang, Ting and Pegrum, Colin and Du, Jia and Guo, Yingjie Jay (2016) Simulation and measurement of a Ka-band HTS MMIC Josephson junction mixer. Superconductor Science and Technology, 30 (1). pp. 1-8. ISSN 0953-2048

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    Abstract

    We report modeling and simulation results for a Ka band high-temperature superconducting (HTS) monolithic microwave integrated circuit (MMIC) Josephson junction mixer. A Verilog-A model of a Josephson junction is established and imported into the system simulator to realize a full HTS MMIC circuit simulation containing the HTS passive circuit models. Impedance matching optimization between the junction and passive devices is investigated. Junction DC I–V characteristics, current and local oscillator bias conditions and mixing performance are simulated and compared with the experimental results. Good agreement is obtained between the simulation and measurement results.