Design approach for dual element hybrid MIMO antenna arrangement for wideband applications

Abstract

This communication explains the designing of two-port based hybrid radiator for multiple-input-multiple-output (MIMO) applications. Hybrid radiator includes U-shaped printed line and ring dielectric resonator antenna (ri-DRA). Wideband characteristics have been achieved by exciting both the U-shaped printed line along with ri-DRA. The U-shaped metallic line acts as a magnetic dipole and helps to excite fundamental hybrid mode (HE11δ) in the ri-DRA. Dual L-shaped and a rectangular defect have been created in ground plane for achieving wideband isolation over the working frequency band. Optimized Scattering parameters and far-field results are verified by fabricating and testing of antenna prototype. Experimental outcomes confirm that the proposed MIMO antenna gives wider impedance bandwidth (80%), improved port isolation (better than 18 dB), stable gain (~ 4 dB), and radiation pattern. Various MIMO performance factors are analyzed and instituted in the tolerable boundaries.