Beam-Switching Antenna with Reconfigurable Hexagonal Frequency Selective Surface

A tunable antenna utilizing a new reconfigurable frequency selective surface (FSS) is studied in this paper. It is composed of a dipole antenna and hexagonal FSS composed by five columns of active periodic structures. The dipole used as an exiting source is placed at the center of the Active hexagonal FSS. High frequency PIN diodes are integrate in the proposed unit cell to control the electromagnetic wave. This active surface is used to control the radiation pattern of the antenna with a reconfigurable directive beam covering all azimuth angles plane. The simulated results confirm that this proposed antenna can operate at 5.2 GHz and the main beam can be cover all azimuth angles in five steps. In addition, the proposed reconfigurable antenna can be used in wireless sensor systems.