Multi-directional beam of patch antenna

Abstract

A parasitic planar patch antenna capable of multidirectional pattern reconfiguration is presented. The integration of mutual coupling principle with the parasitic techniques has realized the pattern reconfigurable features. The antenna structure consists of a driven element surrounded by four parasitic elements act as reflectors and director depending on the switching schemes. All parasitic elements is directly connected to the ground via shorting pins. Reconfiguration achieved using four PIN diode switches by experimentally investigating the effect of switching technique on overall steering performance. The proposed antenna achieves nine clear beam angular positions at □=0°, 0°, 45°, 90°, 135°, 180°, 225°, 270° and 315°. Moreover, the proposed antenna has achieved excellent gain levels at all reconfiguration scenarios with an average value 7 dBi. Regardless of the switching configurations, the proposed antenna has stable S11 between 2.36 GHz to 2.39 GHz application.