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Circularly polarised square patch antenna with asymmetrical Y-shaped feed structure

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1 Author(s)
Y. J. Sung ; Dept. of Electron. Eng., Kyonggi Univ., Suwon, South Korea

A novel single-feed structure for circularly polarised square patch antennas is proposed and theoretically studied. The proposed antenna has a simple structure, consisting of a square radiating patch and an asymmetrical Y-shaped microstrip feed line. The two orthogonal modes with equal amplitude and ±90° out of phase are simultaneously excited by the suggested feed structure with two different branch lengths. It is shown that the proposed antenna has good circular polarisation characteristic.

Published in:

Electronics Letters  (Volume:46 ,  Issue: 19 )