Dielectric Resonators (DRs) have received increased interest in recent years for their potential applications in microwave and millimetre wave systems. They have been widely used as a component in shielded microwave circuits such as filter, oscillator and cavity resonators. With an appropriate feed arrangement, they can also be used as antennas, and they offer efficient radiation. Dielectric resonator antennas (DRAs) in cylindrical, rectangular, and hemispherical shaped and other geometries have been reported in the literature. They can be fed using different feed arrangements including an axial probe, microstrip transmission line, microstrip-slot and co-planner waveguide.

Keywords