Two elements dual segment cylindrical dielectric resonator antenna array with annular shaped microstrip feed

Abstract

In this paper, a dual segment two element wideband cylindrical dielectric resonator antenna array with annular shaped corporate feed network is presented. To enhance impedance bandwidth, multisegmentation concept with shifted center has been pragmatic. Annular shaped microstrip parallel feed with quarter wave transformer etched on a single side of the copper grounded substrate (εr=4.4) is used to excite the dielectric resonator antenna. With this arrangement, approximately 46.8 % impedance bandwidth is achieved for the proposed cylindrical DRA array. The proposed antenna array gives the appreciable gain and better radiation characteristics at resonant frequencies. To validate the proposed design, a prototype of the proposed antenna array is fabricated, according to the optimized dimensions. Simulation is performed using Ansys HFSS simulation software and a close agreement between simulation and measured results has been observed.