Document Type
Article
Rights
Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence
Abstract
A dual-frequency dual-circularly polarised patch antenna with wide beamwidth is proposed. The two-layer structure comprises circular patches with offset circular slots connected to rectangular slots. They provide orthogonal perturbations realising RHCP and LHCP for the lower and upper bands, respectively. The wide beamwidth is realised by extending the substrate beyond the groundplane. Measurements show a maximum beamwidth of 180deg and gains of 3.9 and 0.5 dBic for zenith and 10deg elevation, respectively, for the upper band. The measured beamwidth for the low band is 130deg with a maximum gain of 3.9 and -0.7 dBic for zenith and 10deg elevation, respectively. The axial-ratio is less than 3 dB in the hemisphere for elevations greater than 10deg for both bands.
DOI
https://doi.org/10.1049/el:20082284
Recommended Citation
Bao, X., Ammann, M.: Dual frequency dual circularly-polarised patch antenna with wide beamwidth. Electronics Letters, October 9, 2008, Vol.44, pp.1233-1234, doi:10.1049/el:20082284
Funder
Science Foundation Ireland
Publication Details
In Electronics Letters, October 9, 2008, Vol.44, pp.1233-1234.