MIMO antenna with built-in circular shaped isolator for sub-6 GHz 5G applications

MIMO antenna with built-in circular shaped isolator for sub-6 GHz 5G applications

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A four-port MIMO antenna design focused on the sub-6 GHz fifth generation wireless communication application is presented. The design does not need any other decoupling structure for achieving isolation between multiple ports. A combination of four single wideband antenna units results in the formation of a circular-shaped metallic disc in the ground plane of the proposed antenna. This disc acts as a pool of current with 180° phase difference leading to isolation between various ports. Diversity performance of the antenna is shown with the help of an envelope correlation coefficient using both S-parameter and far-field data. The radiation pattern of the proposed antenna has four lobes in four quadrants for proper reception of signals from different directions. A prototype of the designed antenna is fabricated and measured successfully.

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