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Progress In Electromagnetics Research
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NOVEL APERTURE-COUPLED MICROSTRIP-LINE FEED FOR CIRCULARLY POLARIZED PATCH ANTENNA

By H. W. Lai, K. M. Mak, and K. F. Chan

Full Article PDF (959 KB)

Abstract:
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 Γ-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<3 dB). 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.

Citation:
H. W. Lai, K. M. Mak, and K. F. Chan, "Novel Aperture-Coupled Microstrip-Line Feed for Circularly Polarized Patch Antenna," Progress In Electromagnetics Research, Vol. 144, 1-9, 2014.
doi:10.2528/PIER13101803
http://www.jpier.org/PIER/pier.php?paper=13101803

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