An analysis of microstrip with rectangular and trapezoidal conductor cross sections

Author

Railton, C.J. ; McGeehan, Joseph P.

Author_Institution

Fac. of Eng., Bristol Univ., UK

Volume

38

Issue

8

fYear

1990

Firstpage

1017

Lastpage

1022

Abstract

The finite-difference time-domain (FDTD) technique is used to analyze boxed microstrip with both rectangular and trapezoidal cross sections. It is confirmed that the exact shape of the conductor has a marked effect on the effective permittivity of the microstrip. Results using this method are compared to the findings of K.A. Michalski et al. (1989) using the analytically more complicated boundary element method; very good agreement is observed. The effect of adding a thin passivation layer is also calculated and it is found that such an addition noticeably reduces the effective permittivity of the microstrip. It is shown that the FDTD technique is capable of treating microstrip with a general cross section and producing accurate results.<>

Keywords

boundary-elements methods; difference equations; permittivity; strip lines; waveguide theory; FDTD technique; boundary element method; boxed microstrip; effective permittivity; finite-difference time-domain; microstrip; passivation layer; rectangular conductor cross-section; trapezoidal conductor cross sections; Conductors; Fabrication; Finite difference methods; Magnetic resonance; Microstrip; Microwave circuits; Passivation; Permittivity; Strips; Time domain analysis;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.57325

Filename

57325