A novel planar beam steering antenna

Abstract

In this paper a novel planar beam steering antenna controlled by reactive loads is proposed and designed based on the principle of electrically steerable parasitic array radiator antenna (ESPAR). The antenna prototype is designed using HFSS and the reactance values are optimized by the differential evolutionary (DE) algorithm. The main beam can be steered from -34° to 40° in the xoy plane by controlling the value of the loaded reactance. The frequency range of each state with S11 below -10dB is from 5.7GHz to 6.1GHz while the gain is from 3.5dBi to 4.9dBi.