High gain dielectric resonator filtering antenna for 6G applications

This work examines a hemispherical dielectric resonator filtering antenna with broad bandwidth, low profile and improved gain. It is designed with a rectangular slot on the bottom ground plane, below which dielectric laminated and fed by a fifty-ohm microstrip feed line. The proposed structure offers wider bandwidth and better gain because of the higher order mode of hemispherical dielectric resonator. Further a filtering resonator is placed in the feedline to provide two radiation nulls. A complete analysis of the filtering antenna has been thoroughly examined. The design offers a 10 dB impedance bandwidth of 10.7 % ranging from 7.1 to 7.9 GHz having a centre frequency of 7.5 GHz. It offers a reflection coefficient of more than 30 dB at the centre frequency with a flat gain of 7.4 dB in the working band. The value of simulated radiation efficiency is more than 90 % in the working band. After fabricating the suggested structure, the outcomes are contrasted with the values from the simulation. The proposed filtering antenna may fit the 6G frequency band well.