A novel cheeseholes type Hemispherical Dielectric Resonator antenna for wireless applications

In this paper, a novel cheeseholes type Hemispherical Dielectric Resonator Antenna (HDRA) is proposed. The name has been coined due to the similarity it draws in appearance with a Swiss cheese cube. Here, array of slots are drilled periodically along the three Cartesian axis of the HDRA. In doing so, the bandwidth of operation increases from 10.4% to 25% with a gain of 6.2 dBi at the resonant frequency. The resonant frequency is 2.53 GHz and it excites the TE
₁₁₁
mode. The resonant frequency is most suitable for standard wireless communications with wide band applications.