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

Nasimuddin*, Z. N. Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


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 3dB AR bandwidth is around 3.3 and the 10dB return loss bandwidth achieved is 16.0. The overall antenna size is 0.48λo×0. 48λo×0.092λo at 2.4GHz. The proposed slot microstrip patch technology is useful to design compact, broadband, circularly polarised antennas and arrays.

Original languageEnglish
Pages (from-to)372-378
Number of pages7
JournalIET Microwaves, Antennas and Propagation
Issue number3
Publication statusPublished - 2009
Externally publishedYes


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