A Millimeter-Wave Wideband Dielectric Resonator Antenna Array

In this work, we proposed a novel aperture-fed dielectric resonator (DR) antenna (DRA) to achieve wideband performance in the millimeter wave (mmW) band. Different from the traditional aperture feeding mechanism, the coupling aperture under the DR is comparable to it. This arrangement helps produce a wideband antenna element. At the same time, a parasitic metallic patch is placed on the top of the DR to further expand the bandwidth and reduce the overall profile. To facilitate the gain enhancement, a
$4\times 4$
antenna array is implemented. The simulated results show that it can achieve a wide impedance bandwidth of 37% from 25.1 to 36.5 GHz. Throughout the whole operating bandwidth, stable radiation patterns with low levels of cross-polarization can be observed.