Characterization of Dielectric Resonator Antenna (DRA) for Broadband Applications: An Overview

Abstract

This article presents a brief review on realization techniques of broadband spectrum using Dielectric Resonators (DRs). Dielectric materials have attractive features in millimeter (mm) wave regions. In this article, attention has been focused on broadband design techniques using DRAs. The dielectric resonators possessing multi-resonant frequencies have been used for the purpose. These multi-resonant frequencies could be merged together to produce the required broadband spectrum. The primary goal of this review paper is to improve bandwidth, while maintaining the size of the antenna within the limit. A novel technique has been discussed to realize wide bandwidth by single rectangular DRA with three freed techniques. The multi-resonant frequencies’ nature of radiation pattern has been found, which makes the basis of broadband realization.