Characterization of Nb-Based Superconducting Microstrip Lines Around the Gap Frequency |
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| Authors: | Sheng-Cai Shi Chi-Chung Chin Wen Zhang |
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| Affiliation: | (1) Purple Mountain Observatory, 2 West Beijing Road, Nanjing, 210008, People's Republic of China;(2) Institute of Astronomy and Astrophysics, P.O. Box 1-87, Nankang, Taipei, Taiwan, 115 |
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| Abstract: | Submillimter-wave SIS (superconductor-insulator-superconductor) mixers usually adopt SIS junctions associated with an integrated tuning circuit, which tunes out the junction's geometric capacitance and is typically an inductive thin-film superconducting microstrip line. This paper mainly investigates the characteristic of Nb-based superconducting microstrip lines around the junction's gap frequency, at which the surface resistance of Nb films becomes considerable, and its effect on the performance of SIS mixers. |
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| Keywords: | SIS submillimeter waves microstrip tunning circuit |
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