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A multiple-input and multiple-output (MIMO) system (size 35 × 35 × 0.76 mm 3 ) of the four-element antenna with a 4.69 GHz impedance bandwidth (23.56–28.25 GHz) (millimetre wave) is proposed for 5G communication. The band capacity and radiation properties of the antenna are enhanced by modifying rectangular radiating patches with rectangular-shaped slots in ground plane. The proposed MIMO antenna achieved the isolation of 21 dB. The mutual coupling coefficient, envelope correlation coefficient (ECC), total active reflection coefficient (TARC), diversity gain (DG), mean effective gain (MEG), and channel capacity loss (CCL) are investigated to evaluate the performance attributes of diversity, and the obtained values are −21 dB, 0.007, −10 dB, 9.99 dB, ±3 dB, and 0.30 bits/sec/Hz, respectively. The robustness of the MIMO antenna is further demonstrated in different scenario under Gaussian/uniform propagation conditions. Each antenna has an average total efficiency of 92% and a maximum gain of 6.65 dBi. The testing of fabricated antenna provides excellent experimental results in comparison with simulations.

Quad element millimetre-wave MIMO antenna for 5G communication