Performance Enhancement of MIMO Patch Antenna Using Parasitic Elements

This paper investigates the effects of parasitic elements on performance MIMO patch antenna. Multiple square are added in close proximity to each rectangular elements. These affect electromagnetic field distribution and consequently reduce mutual coupling. In addition, wider bandwidth is also achieved. Two antennas coupled H-plane E-plane designed measured demonstrate proposed concept. The results show that both designs have a wide impedance 14% with isolation more than 20 dB across whole band (with small antenna profile 0.05? 0 ). For 40-dB isolation, H-coupled E-coupled design achieve 2.7% 1.5%, respectively. Compared other methods, method has much simpler structure, comparable improvement tradeoff larger element size.