UWB-MIMO antenna for wireless communication systems with isolation enhancement using metamaterial

This paper proposes a 2x2 MIMO microstrip patch antenna for application in the ultrawideband frequency range. The design makes use of a metamaterial structure to enhance the isolation (S12/S21 parameter), keeping it well below -20dB. The impedance bandwidth of the proposed MIMO is from 2.06 GHz to 15.21 GHz, encompassing the entire UWB bandwidth. The proposed antenna's performance has been validated by measuring five MIMO diversity parameters throughout the impedance bandwidth. CCL is < 0.2 bps/Hz, DG is nearly 10, ECC is < 0.0014, TARC < -10 dB, and MEG stable around -6.25 dB. The overall dimensions of the proposed antenna are 89mm x 30mm x 1.6mm.