Four Element Dual-band Sub-6 GHz 5G MIMO Antenna Using SRR-loaded Slot-Loops

In this paper, a four element MIMO configuration is proposed for possible application in sub-6 GHz 5G wireless access points working in 3 - 4 GHz frequency bands. The proposed antenna uses microstrip-fed square slot-loops loaded with split-ring resonators (SRRs) to achieve miniaturized multiband performance, where extended bandwidth is achieved in the higher frequency range by merging of two narrow bands. Ansys HFSS simulations are used to explain the design methodology of the proposed antenna, by studying its impedance bandwidth, mutual coupling, simulated 3D radiation patterns as well as surface current distribution features. The proposed MIMO antenna exhibits excellent diversity performance (ECC <; 0.1) and MEG-ratio within ±3 dB in uniform propagation scenario. The robustness of the proposed MIMO antenna is further checked for indoor Gaussian / Uniform propagation environment for a wide- range of scenario parameters.