Design of DRA Using Different Dielectrics

This article presents a comprehensive study of the various structured Dielectric Resonator Antennas (DRAs) and also analyzes the effects generated due to change in material of substrate. Dielectric resonator antennas (DRAs) have received increased attention in various applications due to their attractive features in terms of high radiation efficiency, light weight, small size and low profile. Over last decades, various bandwidth enhancement techniques have been developed for DRAs. In this article, the attention is focused on a two type of DRAs that can almost same frequency 3.5 GHz frequencies and when replace the dielectric material of both antennas by FR4 having dielectric constant 4.4 there is a shift in frequency in antenna and another antenna having large bandwidth. Keywords— ―Backing cavity, Dielectric resonator antenna, Microstrip patch antenna, bandwidth, Resonant Frequency‖