NOVEL APERTURE-COUPLED MICROSTRIP-LINE FEED FOR CIRCULARLY POLARIZED PATCH ANTENNA

A wideband circularly polarized patch antenna is proposed. The wide impedance and axial ratio bandwidths are achieved by the proposed feeding mechanism, which entails the use of a circular microstrip line coupling through four [GAMMA]-shaped slots to generate four sequentially phased sources to exci...

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Bibliographic Details
Published in:Electromagnetic waves (Cambridge, Mass.) Mass.), 2014-01, Vol.144, p.1-9
Main Authors: Lai, Hau Wah, Mak, Ka Ming, Chan, Ka Fai
Format: Article
Language:English
Subjects:
Antennas (Electronics)
Radiation (Physics)
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Summary:A wideband circularly polarized patch antenna is proposed. The wide impedance and axial ratio bandwidths are achieved by the proposed feeding mechanism, which entails the use of a circular microstrip line coupling through four [GAMMA]-shaped slots to generate four sequentially phased sources to excite the single layer patch antenna. The proposed antenna can provide an SWR bandwidth of over 16.5% (for SWR < 1.5) and an axial-ratio bandwidth of 13.3% (for AR < 3dB). The performance of the antenna has been confirmed by both measurement and simulation. The antenna gain is enhanced and backlobe radiation is reduced by placing a reflector at an optimized location.
ISSN:1559-8985
1070-4698
1559-8985
DOI:10.2528/PIER13101803