Computation of static and frequency-dependent line parameters of multilayer CPW using static SDA and single layer reduction method

A. K. Verma, Paramjeet Singh*, Ritu Bansal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We reformulate the quasi-static SDA applicable to a lossy multilayer CPW that also incorporates two-layer model of a conductor thickness and the concept of effective permeability due to magnetic field penetration in an imperfect conductor. The present static SDA formulation accounts for the effect of conductor thickness and low frequency dispersion on computation of quasi-static effective relative permittivity and characteristic impedance. The paper also presents the single layer reduction (SLR) formulation and circuit model to compute frequency dependent line parameters of a lossy multilayer CPW. The accuracy of formulation is comparable to that of HFSS and CST, without using complex and time consuming full-wave methods. The results of CST for εeff, Z0, αd, αc of multilayer CPW, in the frequency range 1-100 GHz, deviate from results of HFSS up to 1.26%, 2.78%, 11.75%, and 18.7%, respectively; whereas corresponding deviations of present formulation are up to 1.56%, 2.4%, 3.04%, and 7%. The results of the present formulation and HFSS are also compared against the available experimental results. © 2013 Wiley Periodicals, Inc. Int J RF and Microwave CAE 24:18-29, 2014.

Original languageEnglish
Pages (from-to)18-29
Number of pages12
JournalInternational Journal of RF and Microwave Computer-Aided Engineering
Volume24
Issue number1
DOIs
Publication statusPublished - Jan 2014
Externally publishedYes

Keywords

  • conductor loss
  • dielectric loss
  • multilayer coplanar waveguide (CPW)
  • quasi-static spectral domain analysis (SDA)
  • single layer reduction (SLR) method
  • transverse transmission line (TTL) technique

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