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Broadband circularly polarised cross-patch-loaded square slot antenna
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Journal Article
Broadband circularly polarised cross-patch-loaded square slot antenna
2007
Overview
A new design of a circularly polarised square slot antenna loaded with a cross patch is presented. A cross patch inclined diagonally with respect to the square slot is placed at the centre of the square slot. By choosing proper dimensions of the cross patch, two orthogonal resonant modes with a 90 deg phase difference for circular polarisation can be excited and feed the square slot antenna using a 50 CPW with a protruded signal strip. 10dB return loss bandwidth of 846MHz (39.6%) and 3dB axial ratio bandwidth of 240MHz (12.4%) for the proposed antenna are achieved. Gain variation within the CP bandwidth is observed to be less than 1dB.
Publisher
Institution of Electrical Engineers
