Modeling dispersion and radiation characteristics of conductor-backed CPW with finite ground width

Author

Schnieder, Frank ; Tischler, Thorsten ; Heinrich, Wolfgang

Author_Institution

Ferdinand-Braun-Inst. fur Hochfrequenztechnik, Berlin, Germany

Volume

51

Issue

1

fYear

2003

fDate

1/1/2003 12:00:00 AM

Firstpage

137

Lastpage

143

Abstract

Dispersion and radiation properties of the conductor-backed coplanar waveguide (CPW) with finite ground planes are analyzed and modeled. A frequency-domain finite-difference method using the perfectly matched layer absorbing boundary condition is used as reference. Based on these results, a closed-form description is derived and implemented into an existing quasi-static CPW model. This leads to a comprehensive and efficient CPW description accounting for all relevant effects from conductor loss to high-frequency dispersion. Additionally, design rules to avoid parasitic radiation effects are given.

Keywords

coplanar waveguides; dispersion (wave); eigenvalues and eigenfunctions; finite difference methods; frequency-domain analysis; losses; waveguide theory; closed-form description; conductor loss; conductor-backed CPW; dispersion characteristics; finite ground width; frequency-domain finite-difference method; high-frequency dispersion; parasitic radiation effects; perfectly matched layer absorbing boundary condition; quasi-static CPW model; radiation characteristics; Circuit synthesis; Conductors; Coplanar waveguides; Dielectric substrates; Dispersion; Finite difference methods; Frequency; MMICs; Perfectly matched layers; Radiation effects;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2002.806926

Filename

1159676