Design of Ultra Wideband Cubic Dielectric Resonator Antenna Surrounded by Dielectric Micropillars for THz Applications

In this paper, a cubic dielectric resonator antenna (CDRA) with patterned structure fed through a microstrip line using gold is proposed. Geometry-induced resonant frequency is synthesized with cuboid periodic pattern through micro pillars grown around the DRA. Following the idea of frequency excitation, a synthesized frequency inherits and combines the modal features from several conventional ones of regular DRAs. Antenna radiation patterns have fine complementation, meanwhile, they are excited by a shared feed. To further demonstrate the mechanism of frequency excitation within ultra-wideband (UWB), the field distribution of the proposed CDRA with micro pillars around it is analyzed by varying the height of the pillars. The radiation patterns and surface fields around the core frequencies are also demonstrated here. The simulation results suggest that periodic geometric structures can be utilized to excite a frequency within UWB band for THz applications.