High-Speed Coplanar Transmission Lines

Ulrich D. Keil, Douglas R. Dykaar, A. F.J. Levi, Rose F. Kopf, L. N. Pfeiffer, Sheldon B. Darack, K. W. West

Research output: Contribution to journalArticlepeer-review

35 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 6 cm. the intrinsically low dielectric constant of coplanarair transmission lines is shown to result in high signal speed and low attenuation. We use our data to verify the applicability of a model based largely on empirical formulae for radiation loss (geometry) and conductor absorption. the model is then used to identify optimal design criteria (for a given bandwidth) and is extended to the case of small dimensions.

Original languageEnglish (US)
Pages (from-to)2333-2342
Number of pages10
JournalIEEE Journal of Quantum Electronics
Issue number10
StatePublished - 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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