A Wide band Circularly Polarized Rectangular Dielectric Resonator Antenna Excited by Novel Feed

Abstract

This study presents design and analysis of a wideband circularly polarized (CP) rectangular-shaped dielectric resonator antenna (DRA) which is excited with a new roman three(ш)shaped feed, proposed feed is made-up of five metallic strips, which has been optimised to generate wideband circular polarization. The proposed antenna offers10-dB impedance bandwidth of 9.38% and 3-dB Axial-ratio (AR) bandwidth of 8.26 % in the broadside direction. The proposed DRA achieved the reasonable gain and radiation efficiency of 2-5 dB and 99.15%, respectively throughout operating band. The design is simulated in computer simulation technology (CST) and thoroughly validated through another simulator i.e. High Frequency Electromagnetic Field Simulation (ANSYS HFSS). A significant trend resemblance has been seen between results of both simulators. Furthermore, the proposed design is optimized and enhances the results by changing relative permittivity of the DRA from 9.3 to 8.0 which increase 10-dB impedance bandwidth to 16.08% and 3-dB AR bandwidth to 10.01 % in the broadside direction