High frequency conductor and dielectric losses in shielded microstrip

T. E. van Deventer, P. B. Katehi, A. C. Cangellaris

Research output: Contribution to journalConference articlepeer-review


An integral equation method is developed for calculating the dispersion of imperfectly conducting microstrip lines. Both dielectric losses in the substrate and conductor losses in the strips and ground plane are considered. Multiple conductors on several layers can be studied using an impedance boundary formulation for the derivation of the Green's function. The microstrip losses are evaluated by using a frequency-dependent surface impedance which is derived by solving the fields in the conductors. This surface impedance replaces the conducting strip and takes into account the thickness and skin effect of the strip at high frequencies. Phase constant and attenuation for single and coupled strips are presented. Good agreement with data available in the literature is shown.

Original languageEnglish (US)
Pages (from-to)919-922
Number of pages4
JournalIEEE MTT-S International Microwave Symposium Digest
StatePublished - 1989
Externally publishedYes
EventIEEE MTT-S International Microwave Symposium Digest 1989 - Long Beach, CA, USA
Duration: Jun 13 1989Jun 15 1989

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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