I. Introduction
The investigation in the wireless communication is quickly advancing towards fifth and higher generation networks due to an increasing demand in sharing of information. Hence, a new research paradigm has opened for the successful development of antenna devices with improved design parameters, such as bandwidth, gain, axial ratio, etc. In this regard, dielectric resonator antennas (DRAs) have been considered as one of the key research areas by antenna designers since the past decade [1], [2].