Compact three port MIMO antenna for 4G application

A design for a novel compact microstrip planar MIMO antenna system suitable for 4G application is presented. A decoupling network was introduced to improve the MIMO antenna port isolation. The MIMO system resonates at 5.1GHz, 5.29GHz, 6GHz, 6.1GHz, 11.4GHz, and 11.92 GHz for VSWR ≤ 2 and good port isolation. The MIMO antenna can be configured to be a two-port or three-port system. A prototype of the antenna was fabricated and measured.