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A broadband circularly polarized patch antenna is proposed for WLAN system application. Seven identical curved branches extended from the circular patch are designed to generate circular polarization. Simultaneously, seven identical slots are symmetrically etched on the junction of each curved branch and the circular patch. The dimension of the antenna is reduced by 17.8% compared with no slots. The...
In this letter, a novel method to improve the axial ratio (AR) of circularly polarized patch antenna is presented. The feed network consists of a broadband balun and two L-shaped probes. By introducing a metal sheet between the probes, the AR could be improved at the upper sideband significantly, where there exhibits a downward tendency. Therefore, a wider bandwidth of the AR can be achieved...
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