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Circular polarised microstrip patch antennas for broadband and dual-band operation

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2 Author(s)
Y. J. Sung ; Dept. of Radio Sci. Eng., Korea Univ., Seoul, South Korea ; Y. -S. Kim

A novel design of microstrip patch antennas for circular polarisation (CP) is proposed. As an example, two CP patch antennas are investigated: a broadband CP patch antenna and a dual-band CP patch antenna. The proposed structure can be achieved by embedding circular holes in the microstrip circular resonator. By changing the size and position of loaded holes, two orthogonal modes are simultaneously excited with equal amplitude and ±90° out of phase. Without any 90° phase-shifter, the proposed CP patch antennas are excited by single feed.

Published in:

Electronics Letters  (Volume:40 ,  Issue: 9 )