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Aperture-coupled asymmetrical c-shaped slot microstrip antenna for circular polarisation

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2 Author(s)
Nasimuddin ; RF and Optical Department, Institute for Infocomm Research, 1 Fusionopolis Way, #21-01 Connexis 138632 Singapore E-mail: ; Z. N. Chen

A novel aperture-coupled, asymmetrical C-shaped slot, square microstrip antenna is proposed for circular polarisation (CP). A narrow and asymmetrical C-shaped slot, microstrip antenna is fed at the centre using an aperture coupling to obtain a CP operation. The compactness of the antenna is easily obtained by inserting a C-shaped slot. Wide CP radiation is achieved simply by making the C-shaped slot asymmetrical. With this antenna, the measured 3 dB AR bandwidth is around 3.3% and the 10 dB return loss bandwidth achieved is 16.0%. The overall antenna size is 0.48lambdao times 0.48lambdao times 0.092lambdao at 2.4 GHz. The proposed slot microstrip patch technology is useful to design compact, broadband, circularly polarised antennas and arrays.

Published in:

IET Microwaves, Antennas & Propagation  (Volume:3 ,  Issue: 3 )