Abstract
A new 4-port dual-band printed Multi-Input Multi-Output (MIMO) antenna array operating at 28 GHz and 38GHzin the mm-wave band for 5G communications is proposed in this paper. The designed MIMO antenna array consists of 4 MIMO elements structured with 8 identical patches arranged in 2 × 4 configuration and a cross-shaped defected ground plane on a physical footprint of 43.611×43.611×0.4mm3 Rogers RT/duroid 5880 substrate. In order to obtain the desired dual-band operation with good impedance matching, enhanced gain and bandwidth, the patch elements are designed by incorporating combinations of circular and semi-circular shaped slots, and the cross-shaped ground plane is modified with an extended circular-shaped defect. The suggested MIMO configuration offers a high gain of about 7.9 and 13.7 dB at 28 and 37.3 GHz, respectively. Furthermore, the MIMO performance metrics of the proposed design are analyzed and presented. The prototype of the designed MIMO antenna has been fabricated and measured to validate the simulation results. The simulation and measurement results show good agreement. The proposed MIMO antenna covers 28 GHz (27.50–28.35 GHz) and 37 GHz (37–37.6 GHz) 5G bands to be deployed in the USA and Canada.
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