Isolation enhancement of distinct element dual polarized compact MIMO antenna for 5G/WLAN application

A novel-shaped dual-polarized low-profile multiple-input multiple-output (MIMO) antenna with high isolation is proposed for 5G/WLAN application. An 8-element MIMO antenna design comprises two unique planar radiators (chamfer, circular). Each radiator has dual feed and dual polarization characteristics. The prototype is fabricated with an FR-4 dielectric substrate. A decoupling structure maintains desirable isolation for self-isolated elements (<= $\le $-12 dB) using substrate integrated waveguide stubs between inter-ports and high isolation among the adjacent radiating elements (<= $\le $-15 dB). The simulation was performed by using CST microwave studio. The simulated results of the proposed MIMO antenna are compared with the measurement results. Furthermore, ECC and DG are investigated.