Novel compact circular-polarisation (CP) operation of a circular microstrip antenna, with a cross-slot in the patch centre and a pair of peripheral cuts at opposite sides of the patch boundary, is proposed and experimentally studied. For operation at a fixed frequency, the proposed antenna, using a single probe feed, can have an antenna size reduction of ~ 20%, as compared to regular-size CP operation of a circular microstrip antenna. Details of the experimental results are presented and analysed.
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Chen et al. (1998) studied this question.
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