Eight-Port Tri-Band Mimo Antenna for Wireless Communication Applications

The proposed design is a compact octa-port multiple-input-multiple-output (MIMO) antenna capable of operating in three frequency bands. The antenna is made up of a single element and a modified three-octafaced ring radiator. It can be implemented by a partial ground plane and driven by a microstrip line. The next two-port MIMO antenna features a T-shaped partial ground, resulting in isolation of more than -18 dB throughout all suitable operating bands. The eight-port MIMO antenna consists of four two-element antennas that are arranged orthogonally and have an isolation of -20 dB. The compact proposed eight-port MIMO antenna has a dimension of 1828 mm3, with 10 dB impedance bandwidths of 0.34 GHz (2.28 GHz-2.62 GHz), 0.96 GHz (4.95 GHz-5.91 GHz), and 3.7 GHz (8.04 GHz-11.74 GHz). Furthermore, it can reach a maximum gain of 5 dB, an efficiency of over 80%, and MIMO diversity performance metrics such as ECC < 0.02, DG > 9.9 dB, CCL < 0.2 bits/sec/Hz, MEG < -6 dB, and TARC < -10 dB.