Reconfigurable Radiation Pattern Antenna with eight Switchable Beams in Azimuth Plane for WLAN Wireless System

This work presents a reconfigurable radiation pattern antenna for WLAN wireless system. The reconfigurable antenna is fed by a coaxial cable, and consists of a star patch, eight hexagon-shaped radiation cells and a circular planar ground. The pattern-reconfigurable antenna proposed achieves eight reconfigurable states by controlling the ON and OFF of eight PIN diodes to change the direction. The state change is performed by PIN diodes connected in the gap between the central star patch and the radiation cells. The antenna has a bandwidth of 360 MHz and can steer the beam in the direction 20°, 340° in azimuth plane. The antenna main beam can be switched to eight directions in elevation plane. The simulated results are also presented and investigated.