A Design of Decoupling Structure MIMO Antenna for Mutual Coupling Reduction in 5G Application

A new antenna structure with low mutual coupling between 2 antenna elements for MIMO has been developed and presented in this paper. The decoupling structure has been analyzed and designed between both antennas to suppress the isolation between dual elements. Nine different structures has been designed and 28.75% improvement on isolation has been achieved from pattern 3 decoupling structure. By using the decoupling structure, the antenna bandwidth has been improved tremendously to 20.8%. The antenna has been printed with full copper ground on the bottom layer. The antenna was simulated and optimized at 16 GHz using Computer Simulation Technology (CST) with permittivity, r = 2.2 and thickness, h = 1.57mm on Rodges RT-Duroid 5885 substrate. The antennas are matched at their corresponding frequency of operations. The simulation and fabrication results have shown that the antenna works well.