Microstrip lines on substrates with segmented or continuous permittivity profiles

Author

Kiang, Jean-Fu

Author_Institution

Dept. of Electr. Eng., Nat. Chung-Hsing Univ., Taichung, Taiwan

Volume

45

Issue

2

fYear

1997

fDate

2/1/1997 12:00:00 AM

Firstpage

229

Lastpage

235

Abstract

The propagation properties of microstrip lines on a substrate with inhomogeneous permittivity and conductivity profiles are analyzed. The eigenmodes in each inhomogeneous layer are obtained by solving an eigen equation. These eigenmodes are then used to formulate the Green´s function of the stratified medium. An integral equation is next derived in terms of the surface current on the strip. Galerkin´s method is then applied to obtain a determinantal equation to be solved for the propagation constant. The effect of several permittivity and conductivity profiles are analyzed

Keywords

Galerkin method; Green´s function methods; eigenvalues and eigenfunctions; electrical conductivity; electromagnetic wave propagation; integral equations; microstrip lines; mode matching; permittivity; Galerkin´s method; Green´s function; continuous permittivity profiles; determinantal equation; eigen equation; eigenmodes; inhomogeneous conductivity profiles; inhomogeneous permittivity profiles; integral equation; microstrip lines; mode-matching technique; normalized phase constant; propagation constant; propagation properties; segmented permittivity profiles; stratified medium; substrates; surface current; Capacitance; Conductivity; Dielectric substrates; Integral equations; Microstrip; Moment methods; Permittivity; Propagation constant; Stripline; Strips;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.557604

Filename

557604