Document Type



This item is available under a Creative Commons License for non-commercial use only


1.2 COMPUTER AND INFORMATION SCIENCE, Electrical and electronic engineering

Publication Details

Electronics Letters, vol. 48, no. 11, pp. 614-615, 05/2012.


An omnidirectional circularly-polarised patch antenna is proposed. The antenna radiates right-handed circular-polarisation with an average axial ratio of 2.3 dB over a full 360° . A shallow diagonal CPW inset-feed was used to achieve good matching to the back-to-back coupled patches, providing a measured S11 < -15 dB at the centre frequency. The measured cross-polar performance is better than 13 dB and the realised gain variation is ~3 dB in the plane normal to the substrate.