Effects of finite ground plane on the radiation characteristics of a circular patch antenna

Author

Bhattacharyya, Arun K.

Author_Institution

Dept. of Electr. Eng., Saskatchewan Univ., Saskatoon, Sask., Canada

Volume

38

Issue

2

fYear

1990

fDate

2/1/1990 12:00:00 AM

Firstpage

152

Lastpage

159

Abstract

An analytical technique to determine the effects of finite ground plane on the radiation characteristics of a microstrip antenna is presented. The induced currents on the ground plane and on the upper surface of the patch are determined from the discontinuity of the near field produced by the equivalent magnetic current source on the physical aperture of the patch. The radiated fields contributed by the induced current on the ground plane and the equivalent sources on the physical aperture yield the radiation pattern of the antenna. Radiation patterns of the circular patch with finite ground plane size are computed and compared with the experimental data, and the agreement is found to be good. The radiation pattern, directive gain and input impedance are found to vary widely with the ground plane size

Keywords

antenna radiation patterns; current distribution; electric impedance; microstrip antennas; circular patch antenna; directive gain; equivalent magnetic current source; finite ground plane; induced currents; input impedance; microstrip antenna; near field discontinuity; patch upper surface; physical aperture; radiation characteristics; Antenna feeds; Antenna radiation patterns; Aperture antennas; Diffraction; Directive antennas; Impedance; Magnetic analysis; Microstrip antennas; Patch antennas; Reflector antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.45116

Filename

45116