Design and Investigation of 2x2 Dielectric Resonator Antennas Array for sub-THz Applications

A <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2x2</tex> dielectric resonator antennas (DRAs) array consisting of four high-resistivity silicon rectangular radiating structures, is designed. The radiating structures are placed upon a low-resistivity silicon block. All four antennas are aperture-coupled fed by four microstrip (MS) feedlines, with a ground reflector between the MS feedlines and the antennas. The antenna elements of the array have reflection coefficients <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">< -10\ dB</tex> from 220 GHz to 260 GHz and the realized gain at 240 GHz is 11.1 dBi. Overall, the realized gain of the array is above 10.5 dBi from 235 GHz to 245 GHz.