Summary

International Symposium on Antennas and Propagation

2010

Session Number:4FA4

Session:

Number:4FA4-1

A Wide Beamwidth Small-size Circularly-Polarized Antenna

Kwai-Man Luk,  Biqun Wu,  

pp.-

Publication Date:2010/11/23

Online ISSN:2188-5079

DOI:10.34385/proc.52.4FA4-1

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Summary:
A novel circularly polarized antenna with wide angular coverage is presented. The proposed antenna is composed of four separate patches backed by a compact ground reflector. A single-feed technique is proposed to excite four separate patches for circularly polarized operation. Four opencircuit vertical posts are located on every corner of the square ground reflector to reduce the size of ground reflector. Experimentally, it can achieve an impedance bandwidth (SWR<2) of 19% and a 3dB axial ratio bandwidth of 3.8%. Within the axial ratio operating band, the 3-dB beamwidth is 101.4° ± 1.4° with a gain of 5.76dBi ± 0.18dBi.