Wide Band and High Gain Hollow Cylindrical Dielectric Resonator Antenna Design using Aluminum Cavity for Ku Band Applications

A compact wideband high gain co-axial probe fed hollow cylindrical dielectric resonator antenna using Aluminum cavity is proposed in this paper for Ku band applications. A proposed hollow CDRA is placed on FR4 substrate along with ground plane, which is surrounded by aluminum conical cavity. This configuration enhances the impedance band width of 48.5% and co-polarized peak gain of 15.03dBi from 6.5 dBi of conventional CDRA. The conical cavity also helps to convert broadside radiations of CDRA into highly directional radiations. The proposed HCDRA is compared with the existing bandwidth and gain enhancement techniques in the literature shown in the Table 1. From the comparison it is found that the proposed HCDRA configuration is compact, having high gain and bandwidth.