Finite ground plane effect of a microstrip patch antenna: a CAD formula of impedance perturbation by synthetic asymptote and GTD

Author

Mak, C.L. ; Chow, Y.L. ; Luk, K.M.

Author_Institution

Wireless Commun. Res. Centre, City Univ. of Hong Kong, Kowloon, China

Volume

150

Issue

1

fYear

2003

Firstpage

11

Lastpage

17

Abstract

The computing time for a patch antenna with infinite ground plane using image theory is much shorter than that for a finite ground plane. As the latter is the actual practical structure, it would be of advantage to find a CAD formula to account for the impedance perturbation from an infinite ground plane to a small finite ground plane. This paper synthesises such a formula from the ground plane asymptotes aided by the GTD (geometrical theory of diffraction). The GTD has been used to study antenna patterns and backlobes. The paper completes the picture by considering radiation impedance.

Keywords

CAD; antenna earths; antenna radiation patterns; electric impedance; electrical engineering computing; geometrical theory of diffraction; microstrip antennas; CAD formula; GTD; antenna backlobes; antenna patterns; computing time; finite ground plane effect; geometrical theory of diffraction; image theory; impedance perturbation; infinite ground plane; microstrip patch antenna; radiation impedance; synthetic asymptote;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:20030295

Filename

1194090