Bipolar M-EBG structure for WIMAX base station sectoral antennas

This Letter deals specifically with sectoral antennas and focuses on the ability to design a bipolar structure using a double layer of metallic electromagnetic bandgap (M-EBG) materials working on orthogonal polarisations as a superstrate. This antenna is able to radiate in vertical, horizontal and dual polarisation with a wide radiation pattern form, i.e. presenting at least 60?? angular beamwidth in the azimuth plane. A bipolar M-EBG sectoral antenna for WIMAX application [5.15??5.35] GHz is designed and its performances are presented. Finally, a prototype is realised and experimental measurements are compared to simulated ones.