Dual-Frequency Dual Circularly-Polarized Patch Antenna with Wide Beamwidth

TitleDual-Frequency Dual Circularly-Polarized Patch Antenna with Wide Beamwidth
Publication TypeJournal Article
Year of Publication2008
AuthorsX. L. Bao, and M. J. Ammann
Journal TitleElectronics Letters
Volume44
Issue21
Pagination1233-1234
Journal Date10/2008
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 180° and gains of 3.9 and 0.5 dBic
for zenith and 10° elevation, respectively, for the upper band. The measured beamwidth for the low band is 130° with a maximum gain of 3.9 and -0.7 dBic for zenith and 10° elevation, respectively. The axial-ratio is less than 3 dB in the hemisphere for elevations greater
than 10° for both bands.

URLhttp://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=4648965
DOI10.1049/el:20082284