Scattering Parameter and Bit Error Rate Characterization of High Temperature Superconducting Coplanar Transmission Lines

J. Kruse, W. H. Chang, D. Scherrer, F. Gao, M. Feng

Research output: Contribution to journalArticle


We report the gigahertz experimental results of time and frequency performance on YBCO high temperature superconductor (HTS) and gold coplanar transmission lines. An on-wafer direct probing measurement system was used to collect data at cryogenic temperatures on both YBCO and gold coplanar lines. The insertion loss of the 6-cm lines at a frequency of 3.0 GHz was measured to be -0.12 dB for the superconducting line compared to -10.7 dB for the gold line at 80 K. Error rate and eye-diagram measurements were performed on the packaged lines and show the correlation between the insertion loss of the line and the attenuation of a Pseudo Random Bit Sequence (PRBS). The superconducting line measured at 77 K had a BER rate of less than 10-11 at a data rate of 3 Gb/s. The measured eye height was 350 mV for the YBCO compared to 100 mV for a gold line at 3 Gb/s and a temperature of 77 K for the packaged 6-cm lines.

Original languageEnglish (US)
Pages (from-to)3518-3521
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number4
StatePublished - Dec 1995


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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