Quasi-static characteristic of a shielded cylindrical coupled microstrip transmission line by finite-element method

Author

Kolbehdari, M.A.

Author_Institution

Dept. of Electr. Eng., Temple Univ., Philadelphia, PA, USA

fYear

1994

fDate

10-13 Apr 1994

Firstpage

170

Lastpage

174

Abstract

This paper presents a finite-element method of numerical analysis for a system of a shielded cylindrical coupled microstrip transmission lines. The complete polynomial field of the high order element up to fourth is used in this study. The microstrip line consists of two coupled dielectric circular cylinders characterized by permittivity ε₁ and ε₂ and partially embedded in the ground plane. The two infinitesimally thin strips with arbitrary size are clad on the coupled dielectric circular cylinders. The coupling between the two conducting strips of the coupled microstrip line is investigated. The first and higher order elements are used in the finite-element method to calculate for the quasi-static potential and the corresponding field distribution in the microstrip line. The capacitance per unit length of the line is obtained from a variational expression and the effective dielectric constant, characteristic impedance, and phase velocity are also computed. A perturbational method is used to calculate the losses due to conductor and dielectric dissipation

Keywords

electric impedance; finite element analysis; magnetic shielding; microstrip lines; permittivity; perturbation techniques; variational techniques; waveguide theory; capacitance per unit length; characteristic impedance; conducting strips; coupled dielectric circular cylinders; coupled microstrip line; dielectric dissipation; effective dielectric constant; field distribution; finite-element method; ground plane; high order element; losses; microstrip transmission line; numerical analysis; permittivity; perturbational method; phase velocity; polynomial field; quasi-static characteristic; quasi-static potential; shielded cylindrical coupled line; variational expression; Capacitance; Couplings; Dielectric losses; Finite element methods; Microstrip components; Numerical analysis; Permittivity; Polynomials; Strips; Transmission lines;

fLanguage

English

Publisher

ieee

Conference_Titel

Southeastcon '94. Creative Technology Transfer - A Global Affair., Proceedings of the 1994 IEEE

Conference_Location

Miami, FL

Print_ISBN

0-7803-1797-1

Type

conf

DOI

10.1109/SECON.1994.324291

Filename

324291