Title :
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
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;
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings
DOI :
10.1049/ip-map:20030295
