Wideband cylindrical dielectric resonator antenna operating in HEM<inf>11δ</inf> mode with improved gain: An effect of superstrate and parasitic sheet

Abstract

A compact slot-coupled dielectric resonator antenna is designed, fabricated, and characterized. A narrow transparent non-metal superstrate and parasitic sheets are used to improve the far-field characteristics like: gain, co-pol and cross-pol. The antenna operates over 17.71% bandwidth (6.95-8.3) GHz with ~8 dBi peak gain and at the same time it maintains a separation of 45 dB, 20 dB between co-pol and cross-pol in H-plane and E-plane, respectively. The efficiency of the proposed antenna is above 85% in the operating band. The measured results shows fairly good matching with their simulated counterparts. The performance of the antenna shows its potential for X-band wireless applications.