High Speed Normal and Superconducting Coplanar Transmission Lines

U. D. Keil, D. R. Dykaar, A. F.J. Levi, R. F. Kopf, L. N. Pfeiffer, S. B. Darack, K. W. West

Research output: Contribution to journalLetterpeer-review

1 Scopus citations


We present measurements of picosecond pulse propagation on coplanar strip transmission lines for which speed (i.e. group velocity), as well as phase and amplitude information are measured. Electrode effects are studied using transmission line loops 1 mm in diameter with cumulative propagation distances as long as 10 cm. The intrinsically low dielectric constant of coplanar-air transmission lines is shown to result in high signal speed and low attenuation. The results are compared to the case of superconducting electrodes.

Original languageEnglish (US)
Pages (from-to)2812-2815
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number1
StatePublished - Mar 1993
Externally publishedYes

All Science Journal Classification (ASJC) codes

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


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