Wide Band Superconducting Microstrip Delay Line

Hieng Su, [No Value] [No Value], Frederick Huang, Michael Lancaster

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


This paper describes the design, fabrication, and testing of a novel microstrip superconducting delay line. The structure of the delay line is a double-spiral meander line. The device is patterned from a YBa2Cu3O7-delta(YBCO) thin film deposited on both sides of a 2-in-diameter LaAIO(3) substrate with a thickness of 0.25 mm. It exhibits low insertion loss up to 20 GHz. At 10 GHz, the measured attenuation is 0.031 dB/ns at 30 K, In 0.049 dB/ns at 60 K, and 0.118 dB/ns at 77 K. The magnitudes of the ripples are below 2 dB across the entire band. The total delay at low frequency is approximately 29 us.
Original languageEnglish
Pages (from-to)2482-2487
Number of pages6
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number11
Publication statusPublished - 1 Nov 2004


  • high-temperature superconductors (HTSs)
  • delay lines
  • superconducting transmission lines
  • microstrip


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