A planar 8-port MIMO antenna for 2.4-GHz WLAN applications

A planar 8-port MIMO antenna consisting of only 4 slot elements is proposed in this paper. The antenna has a symmetrical structure and is designed to operate from 2.40-2.48 GHz. Each of the 4 slot elements is serving as a common radiator for 2 input ports. A T-shaped defected ground structure (DGS) is cut in the middle of the slot element to increase isolation between the two input ports to more than 10 dB and reduce the Envelop-Correlation Coefficient (ECC) to below 0.1. The proposed antenna is studied using computer simulation and fabricated for measurement using the Satimo Starlab system.