Design of Circular Waveguide Annular Slot Coupled Two-layer DRA for Linear and Circular Polarizations

The design of a circular-waveguide coupled two-layer dielectric resonator antenna (DRA) configuration is presented. It is observed that besides a reduction in the number of layers compared to a rectangular waveguide coupled multilayer-DRA structure to achieve coupling and enhanced bandwidth, the current configuration significantly enhances the functionality of the design in the realization of dual...