Characterization of Nb-Based Superconducting Microstrip Lines Around the Gap Frequency

  • Sheng-Cai Shi
  • Chi-Chung Chin
  • Wen Zhang


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.

SIS submillimeter waves microstrip tunning circuit 


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  1. [1]
    W.H. Chang, J. Appl. Phys. 50(12), 8129 (1979).Google Scholar
  2. [2]
    D.C. Mattis and J. Bardeen, Phys. Rev., 111(2), 412 (1958).Google Scholar
  3. [3]
    R. Pöpel, Superconducting Quantum Electronics, Springer-Verlag: Berlin, 44 (1989)Google Scholar
  4. [4]
    S. Ramo, J.R. Whinnery, and T. van Duzer, Fileds and Waves in Communication Electronics, 2nd edition, New York, NY: John Wiley & Sons, 1984.Google Scholar
  5. [5]
    Büttgenbach et al, Int. J. IR & MM Waves, 11, 1 (1988).Google Scholar
  6. [6]
    T. Noguchi, S.C. Shi, and J. Inatani, IEICE Trans. Electronics, E78–c, 481 (1995).Google Scholar
  7. [7]
    S.C. Shi, T. Noguchi, and J. Inatani, Proc. 8th Int. Symp. on Space Terahertz Tech., Boston, 81 (1997).Google Scholar

Copyright information

© Plenum Publishing Corporation 2000

Authors and Affiliations

  • Sheng-Cai Shi
    • 1
  • Chi-Chung Chin
    • 2
  • Wen Zhang
    • 1
  1. 1.Purple Mountain ObservatoryNanjingPeople's Republic of China
  2. 2.Institute of Astronomy and AstrophysicsNankang, TaipeiTaiwan

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