Dielectric resonator based pattern reconfigurable antenna

In this paper, pattern diversity scheme based on Dielectric resonator antenna (DRA) and parasitic directive array is presented. Antenna is centrally fed through DRA and by reconfiguring the states of switches in the parasitic elements pattern diversity is achieved. DRA is excited in EH
_11δ
mode and thus provides omni-directional radiation pattern. Parasitic elements behave like transparent and opaque surface to a vertically polarized incident wave for the ON and OFF states of switch respectively. Proposed antenna offers uniform gain of ~4.8 dBi with beam steering along the entire azimuth plane. The simulation has been carried out for the operating frequency of 6.32 GHz using ANSYS HFSS & CST Microwave studio software.