Dielectric Resonator Loaded Two Port Circularly Polarized MIMO Antenna for Sub 6 GHz Band Coverage

Abstract

This letter discusses a dielectric resonator-loaded circularly polarized MIMO antenna with dual-port and dual-mode features. A square aperture excites the dielectric resonator antenna, which generates two resonant frequencies between 3.17 GHz and 3.59 GHz and 5.4 and 5.67 GHz. The antenna's dual-band functioning and capacity to create two hybrid modes, $\mathbf{HE_{11\delta}}$ and $\mathbf{HE_{12\delta}}$ , at two separate resonant frequencies, which provide diverse radiation properties, are appealing. Modified circular form feed line isolation $\boldsymbol{(\vert \mathrm{S}_{12}\vert)}$ provides -20 dB between ports. Gains are 5 and 6.5 dBi, while radiation efficiency is almost 90 ^% . MIMO antennas have better diversity according to Envelop channel correlation (ECC), Diversity gain (DG), and Total active reflection coefficient (TARC) values. HFSS models the design and the constructed module verifies it.