Study of broadband CP patch antenna with its ground plane having an elevated portion

Author

Tzeng, Yu-Bo ; Su, Che-Wei ; Lee, Ching-Her

Author_Institution

Dept. of Electron. Eng., National Changhua Univ. of Educ., Taiwan

Volume

4

fYear

2005

fDate

4-7 Dec. 2005

Abstract

A novel broadband circularly polarized patch antenna is presented. The antenna has a thick air-layer substrate; however, it can be easily excited by using a short probe pin. CP operation is obtained by selecting an optimal size of the truncated corners, and good impedance matching over a wide bandwidth is achieved by using a ground plane with an elevated portion. For a prototype built for WLAN operation in the 2.4 GHz band (2.4-2.484 GHz), the obtained CP bandwidth (3-dB axial ratio) reaches about 3.9%∼7.5% and the measured antenna gain is about 9.3∼7.4 dBic across the CP bandwidth for the air-layer substrate thickness varying from 8 mm to 14 mm. Details of the antenna design and experimental results are presented.

Keywords

UHF antennas; broadband antennas; microstrip antennas; polarisation; wireless LAN; 2.4 to 2.484 GHz; 8 to 14 mm; WLAN; antenna design; broadband antenna; circularly polarized antenna; impedance matching; patch antenna; thick air-layer substrate; Antenna measurements; Bandwidth; Gain measurement; Impedance matching; Patch antennas; Polarization; Probes; Prototypes; Thickness measurement; Wireless LAN; WLAN; broadband antenna; circularly polarized antenna; patch antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings

Print_ISBN

0-7803-9433-X

Type

conf

DOI

10.1109/APMC.2005.1606843

Filename

1606843