Advancements in Design and Development of Dielectric Resonator Antennas

Abstract

With the advancements in wireless communication, dielectric resonator antenna newline(DRA) can efficiently come up as the suitable substitution in comparison to the other newlineconventional conducting antennas. In the past decades, several works have been newlinereported for exploring the field of DRA for the upcoming futuristic technologies. newlineTherefore, this thesis deals with the concepts related to the advancement in designing newlineand development of DRA. The work done in this thesis mainly explores various newlineresearch issues related to DRA that includes (i) obtaining circularly polarized (CP) newlineresponse, miniaturization and tuning of small frequency-ratio in dual-band DRA using newlinethe single-feeding technique, (ii) exploring the multi-input-multi-output (MIMO) newlineconfiguration in DRA with the achievement of wideband response and study of newlinevarious MIMO performance parameters using multi-port feeding technique, and (iii) newlineobtaining CP generation technique in nano-DRA (NDRA) for THz and optical newlinefrequency communication range. In order to fulfil the first research issue, a dual-band newlinerectangular circularly polarized DRA (CPDRA) has been developed using singlefeeding newlinetechnique. The antenna provides miniaturization using metallic-strips on the newlinesurface of DR. In addition, the specific arrangement of these strips results in the newlinegeneration of orthogonal modes. Thus, CP response has been achieved in the reported newlineDRA. Later, the frequency-ratio of the antenna can be tuned using different surface newlineareas of the metallic-strips. The antenna reported in this work can be utilized for newlineaeronautical radio navigation and satellite communication at microwave frequency newlinerange applications. Further, the research issues explained in second category has been newlinecovered using two reported MIMO DRAs; the first one includes the achievement of newlinesuper-wideband response having 132.69% of and#8722;10 and#119889;and#119861; impedance bandwidth due to the merging of higher-order modes in two-port MIMO DRA.