Abstract
A novel method for designing a beam-switching antenna using active Frequency Selective Surfaces (FSSs) is presented. The antenna is composing of a single dipole placed at the center of an active cylindrical FSS that is divided in six equal sectors by metallic sheets. Metallic cones at the top and bottom of the structure are used to enhance the radiation performance of the antenna. In each step, the diodes in one FSS-sector are off, whereas other diodes are on. The FSS-sector with off-state diodes defines the direction of the radiation pattern. The proposed antenna operates from 2.4 GHz to 2.8 GHz with gain of 11 dBi. The antenna radiation pattern can be swept in the entire azimuth plane in six steps with a 3-dB beamwidth of 60°. This antenna could be used in the base station of the wireless communication systems.
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