SIW fed MIMO DRA for future 5G applications

In this paper, a four element multiple-input multiple-output (MIMO) cylindrical dielectric resonator antenna (DRA) is presented. Each element of MIMO antenna system consists of substrate integrated waveguide (SIW) fed cylindrical DRA which are arranged such that MIMO configuration provides both spatial and polarization diversity to combat multipath fading. The proposed antenna is operating at 27.7 GHz with the simulated impedance bandwidth (|S11| < −10 dB) of 6.92% (26.64–28.55 GHz). The input port isolation is better than 27 dB throughout the operating bandwidth. For all the four excitation ports, the antenna radiates in broadside direction with peak gain ranging from 5.07–5.70 dBi over the operating band. The envelope correlation coefficient (ECC) is well below 0.0005 and channel capacity loss (CCL) is under 0.6 bits/sec/Hz in the desired band. The proposed antenna could be suitable for next generation 5G communication systems.