Wideband Compact Two-Element Millimeter Wave MIMO Antenna for Communication Systems

This article presents the wide band two-element MIMO antenna with an I-shaped decoupling structure in the ground plane. It is to enhance the isolation on the MIMO antenna. The dimension is $7.5 \times 17.5\ \text{mm}^{2}$. The measured bandwidth is 2 GHz (22.25-24.25 GHz) with a maximum gain of 4.5 dBi and bidirectional radiation. MIMO antenna satisfies three diversity metrics.