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Superconducting bandpass filters on thin films of NdBa2Cu3O7

Authors
Journal
Physica C Superconductivity
0921-4534
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/j.physc.2005.03.059
Keywords
  • Superconducting Filters
  • Microwave
  • Thin Films
  • Ndba2Cu3O7
Disciplines
  • Physics

Abstract

Abstract For possible application to microwave filters, we examined high-quality superconducting films of NdBa 2Cu 3O 7 (NBCO), whose T c is higher than that for YBa 2Cu 3O 7 (YBCO). We fabricated bandpass filters on NBCO films and characterized them with measurements of the scattering parameters and third-order intermodulation. The results indicate that utilizing MBE-grown films of NBCO is effective in obtaining filters with high-power-handling capability. The filters made from NBCO films yielded higher values for the third-order intercept, IP3, than filters made from YBCO films, which has been widely used for microwave applications of high-temperature superconductivity so far. For the filters of NBCO, we also investigated the effects of oxygen annealing and passband width on the power-handling capability.

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