Cylindrical dielectric resonator antenna designs that have reduced lateral radiation

Three designs for cylindrical dielectric resonator antennas (DRAs) are presented that have little lateral radiation. The three designs have different combinations of aspect ratio and permittivity depending on the feed arrangement: the TM₁₂₁ mode is used for an aperture-coupled feed and a hybrid probe-DRA mode is used for probe-fed and dual probe-fed variations. These proposed antennas reduce mutual coupling between array elements as well as mitigate the impact of edge diffraction on the radiation patterns when mounted on finite ground planes.