Dual polarization millimeter-wave antenna for microcell base station

This paper proposes a novel differential feed antenna element for millimeter wave communication system. The antenna consists of a spatial parallel radiation patch and the microstrip differential feed to widen the impedance bandwidth of the antenna element, using four metal columns to improve the match between the microstrip and the radiation patch. Simulated results indicate the designed antenna achieved a notably wide bandwidth and high isolation. Moreover, the antenna has stable radiation patterns with half-power beam width of 65 degree on the horizontal plane and a top gain of 7.1 dBi over the operating band. This antenna is suitable for micro base station in 5G millimeter wave communication system.