Title :
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
fDate :
4/1/2003 12:00:00 AM
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;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2003.811067
