Abstract
In this article, a four-port wideband multiple-input-multiple-output (MIMO) antenna consisting of moon-shaped slot radiators positioned at the ground plane corners is presented. Slotted square ring metamaterial structures as parasitic element have been loaded on the substrate adjacent to the feed lines to enhance the operating bandwidth and miniaturize the antenna. The proposed MIMO antenna has a measured bandwidth of 3.11 to 6.6 GHz (71.88%) with more than 18 dB isolation between antenna elements. Furthermore, simulated diversity parameters such as envelope correlation coefficient, diversity gain, mean effective gain, and channel capability loss are validated with the measured values and found within the acceptable limits over the operating frequency. The proposed antenna can be applied in 5G below 6 GHz (3.3-5.0 GHz), WLAN (4.9-5.725 GHz), and WiFi (5.15-5.85 GHz) bands.
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