Dielectric Resonator Array Fed by Slot Ridge-gap Waveguide Cavity for Millimeter Wave Applications

Abstract

This paper investigates the radiation characteristics of dielectric resonator antenna (DRA) array using the ridge-gap waveguide (RGW) technology for millimeter wave applications at 60 GHz. The array element consists of rectangular DRA mounted on ground plane with coupling slot. The signal is excited through a single rectangular slot in ridge-gap waveguide cavity. Different array arrangements are investigated for gain and bandwidth improvement. Each array geometry has compact size of 23.04×22.27×5.88 mm3 for 60 GHz applications. 1×3 linear array, two crossed 1×3 arrays, and 3×3 array arrangements are investigated. These arrangements have a single excitation slot and a number of coupling slots equals to the DRA elements. A peak gain of 11.3dBi, 12.9 dBi, and 16 dBi are achieved for different array arrangements. The proposed structures are full-wave simulated using the finite integral technique (FIT).