Closed-form asymptotic extraction method for coupled microstrip lines

Seong Ook Park, Constantine Balanis

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


The effective dielectric constants of a symmetric coupled microstrip line operating in the dominant mode are solved by using a closed-form formula of the asymptotic part of the impedance matrix elements. Using this asymptotic closed-form solution, the finite upper limit for numerical integration in the evaluation of the impedance matrix elements is significantly reduced. This results in improved computational efficiency for determining the ∈reff of a coupled microstrip line while retaining a good accuracy compared to the conventional spectral domain approach (SDA).

Original languageEnglish (US)
Pages (from-to)84-86
Number of pages3
JournalIEEE Microwave and Guided Wave Letters
Issue number3
StatePublished - Mar 1997


  • Asymptotic extraction
  • Coupled microstrip lines

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy


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