Summary
International Symposium on Antennas and Propagation
2015
Session Number:S5.4
Session:
Number:S5.4.4
Wideband ± 45? Polarization Reconfigurable Aperture-Fed Patch Antenna
Wei Lin, Hang Wong ,
pp.-
Publication Date:2015/11/9
Online ISSN:2188-5079
Summary:
This paper introduces a wideband aperture-fed patch antenna with ± 45? reconfigurable polarizations. A new method is proposed to achieve the switchable ± 45? polarizations by designing a reconfigurable feeding aperture for a square radiating patch. To realize this, we introduce four PIN diodes as RF switches connected between a cross feeding aperture such that the orthogonal directions of the rectangular aperture can be controllable. As the result, ± 45? polarizations can be reconfigured since the polarization is determined by the direction of the feeding aperture. In order to widen the bandwidth of a single patch antenna, we introduce a parasitic patch above the main radiating patch to bring an additional resonance. The bandwidth of the double-patch structure can reach 21% which is much wider than that of a single patch. In addition, the antenna has a stable gain across the operating bandwidth with the peak gain of 9.6 dBi. Good broadside radiation patterns are obtained with the 3-dB beamwidth of 56 degree. The antenna is suitable for applications requiring wideband and polarization reconfigurable characteristics.