volume | PIER Journals

Abstract

This study presents a compact four-port antenna optimized for sub-6 GHz 5G MIMO systems. The design incorporates a crescent-shaped radiating element paired with a defected ground structure (DGS) to improve both bandwidth and port-to-port isolation. Operating within the 3.2-3.8 GHz frequency band, the antenna maintains a VSWR below 2. The orthogonal arrangement of the radiators effectively suppresses mutual coupling, ensuring that isolation levels exceed -15 dB. Simulated and measured results validate the design, demonstrating a maximum gain of 5 dBi and radiation efficiency reaching up to 80%. Key MIMO performance indicators - such as envelope correlation coefficient (ECC), total active reflection coefficient (TARC), channel capacity loss (CCL), and diversity gain (DG) - confirm the antenna's suitability for robust 5G communication.

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Dr. Rajendran Dhananjeyan

Mr. Mohit Pant

Dr. Kumarasamy Vishalatchi

Mr. Subramaniyan Janarthanan

Dr. Ponnusamy Sukumar

Dr. Dhanushkodi Siva Sundhara Raja

Dr. Dhandapani Rajeshkumar