Broadband dual-polarized aperture-coupled patch antennas with modified H-shaped coupling slots

Author

Wong, Kin-Lu ; Tung, Hao-Chun ; Chiou, Tzung-Wern

Author_Institution

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

Volume

50

Issue

2

fYear

2002

fDate

2/1/2002 12:00:00 AM

Firstpage

188

Lastpage

191

Abstract

This paper presents a new design of aperture-coupled patch antennas with modified H-shaped coupling slots for achieving dual-polarization radiation with high isolation over a wide bandwidth. By using the proposed coupling slots, whose two upper side arms are bent inward with a proper angle, the isolation between the two feeding ports of the patch antenna can. greatly be improved, compared to the case with conventional H-shaped coupling slots. Also, when using a pair of modified H-shaped coupling slots for each feeding port, the isolation can further be improved; a high degree of isolation (< -34 dB) over the entire impedance bandwidth greater than 15% and good cross-polarization level (> 20 dB) for the two polarizations can be achieved. Details of the proposed design and experimental results are presented and discussed

Keywords

UHF antennas; antenna radiation patterns; electromagnetic wave polarisation; microstrip antennas; 1500 to 2000 MHz; aperture-coupled patch antennas; broadband patch antennas; cross-polarization level; dual-polarized antennas; impedance bandwidth; isolation; modified H-shaped coupling slots; radiation patterns; Antenna feeds; Aperture antennas; Aperture coupled antennas; Arm; Bandwidth; Broadband antennas; Electromagnetic coupling; Microstrip antennas; Patch antennas; Slot antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.997993

Filename

997993