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This communication presents a small size, planar, and two-port wideband multiple-input-multiple-output (MIMO) antenna operating from 2.08 GHz to 5.81 GHz with 94.55% fractional bandwidth. It satisfies the bandwidth requirements of multiple wireless applications in both 5G (sub-6 GHz band) and 4G bands namely Bluetooth (2.4 GHz), LTE (2.5 GHz), WLAN (2.4/5.2/5.8 GHz), and WiMAX (3.5/5.5 GHz). An electromagnetic band-gap (EBG) structure is embedded in the ground plane to reduce the resulting mutual coupling between the antenna elements. As a result, more than 18 dB port isolation is obtained over the entire working band. The important MIMO antenna performance parameters such as envelope correlation coefficient (ECC &lt; 0.05), diversity gain (DG &gt; 9.95 dB), and channel capacity loss (CCL &lt; 0.345 bits/s/Hz) are within the acceptable ranges. Measurement is done on the fabricated antenna. A reasonable agreement is observed between the simulated and measured results.

Wideband MIMO Antenna Mutual Coupling Reduction with Electromagnetic Band-Gap Structure