DocumentCode :
801731
Title :
Low-cost broadband circularly polarized patch antenna
Author :
Chang, Fa-Shian ; Wong, Kin-Lu ; Chiou, Tzung-Wern
Author_Institution :
Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
Volume :
51
Issue :
10
fYear :
2003
Firstpage :
3006
Lastpage :
3009
Abstract :
A novel single-feed broadband circularly polarized patch antenna is proposed. The proposed antenna has a simple structure, consisting of a corner-truncated square radiating patch, an L-shaped ground plane, and a probe feed. Through a via hole in the vertical ground of the L-shaped ground plane, the radiating patch is easily excited by a probe feed oriented in the same plane as the patch, and circular polarization (CP) radiation over a wide frequency range (>10%) is achieved. Experimental results of a constructed prototype with the center operating frequency at about 2500 MHz showed that the antenna has an impedance bandwidth (1.5:1 VSWR) of about 30%, a 3-dB axial-ratio CP bandwidth of about 10.4%, and a gain level of 8.5 dBi or larger within the CP bandwidth. In addition to the low cost of the proposed antenna due to its simple structure, the obtained CP performance is among the best that have been reported for single-feed single-element patch antennas.
Keywords :
UHF antennas; antenna feeds; antenna radiation patterns; broadband antennas; electric impedance; electromagnetic wave polarisation; microstrip antennas; 8.5 dB; L-shaped ground plane; VSWR; broadband antenna; broadband circularly polarized patch antenna; circular polarization; circularly polarized antenna; corner-truncated square radiating patch; impedance bandwidth; probe feed; radiation patterns; Antenna feeds; Bandwidth; Broadband antennas; Dielectric substrates; Frequency; Impedance matching; Patch antennas; Polarization; Probes; Prototypes;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2003.818010
Filename :
1236125
Link To Document :
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