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1.2 COMPUTER AND INFORMATION SCIENCE, Electrical and electronic engineering
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.
A. Narbudowicz, X. L. Bao, and M. J. Ammann, "Omnidirectional Circularly Polarised Microstrip Patch Antenna", Electronics Letters, vol. 48, issue 11, pp. 614-615, 05/2012.