Finite ground plane effects on broad-band dual polarized patch antenna properties

Author

Wong, Kin-Lu ; Chiou, Tzung-Wern

Author_Institution

Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan

Volume

51

Issue

4

fYear

2003

fDate

4/1/2003 12:00:00 AM

Firstpage

903

Lastpage

904

Abstract

Effects of finite ground plane on the isolation and radiation properties of a broad-band dual-polarized aperture-coupled patch antenna are experimentally investigated. The dual-polarized patch antenna has a thick air substrate for broad-band operation (>16% for both polarizations) and is excited by microstrip lines through two H-shaped coupling slots. Results show that by selecting suitable ground-plane dimensions, isolation between the two feeding ports can be greatly enhanced by about 10 dB, and the cross-polarization level in the E and H planes can also be improved by about 10 and 5 dB, respectively. Also, the impedance bandwidth increases with decreasing ground-plane dimensions.

Keywords

UHF antennas; antenna earths; antenna feeds; antenna radiation patterns; electromagnetic wave polarisation; microstrip antennas; microstrip lines; 1800 MHz; E-plane; H-plane; H-shaped coupling slots; UHF; aperture-coupled patch antenna; broadband dual polarized patch antenna; cross-polarization level; feeding ports isolation; finite ground plane effects; ground-plane dimensions; impedance bandwidth; isolation properties; microstrip lines; patch antenna properties; radiation properties; thick air substrate; Antenna measurements; Bandwidth; Electromagnetic coupling; Feeds; Geometry; Impedance; Loss measurement; Microstrip antennas; Patch antennas; Polarization;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2003.811067

Filename

1208554