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Microwave Loss Measurements on YBCO Films Using a Stripline Resonator

  • A. M. Kadin
  • D. S. Mallory
  • P. H. Ballentine
  • M. Rottersman
  • R. C. Rath

Abstract

Thin films of YBa2Cu3O7 were deposited by rf magnetron sputtering onto heated substrates, and were superconducting without a subsequent anneal. Several of these films were placed as ground planes in a stripline resonator in a temperature-controlled cryostat. The frequency dependence of the reflection coefficient was measured up to 3 GHz using a network analyzer. From the quality factor Q of the resonances, the microwave surface resistance RS of the superconducting films was determined over a range of temperatures. For a YBCO film on (100) LaGaO3, RS(2 GHz) was less than 3 mΩ for T<40K.

Keywords

Reflection Coefficient Ground Plane YBCO Film Conductor Loss Center Strip 
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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • A. M. Kadin
    • 1
  • D. S. Mallory
    • 1
  • P. H. Ballentine
    • 1
  • M. Rottersman
    • 2
  • R. C. Rath
    • 2
  1. 1.Dept. of Electrical EngineeringUniversity of RochesterRochesterUSA
  2. 2.CVC Products, IncRochesterUSA

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