A Dual-Port Wideband MIMO Antenna for Sub-6GHz 5G Applications

Abstract

This paper presents a dual-port multiple-input multiple-output (MIMO) antenna designed for sub-6 GHz fifth-generation (5G) applications. The MIMO antenna features a defected rectangular microstrip patch and a partially grounded structure, contributing to excellent radiation characteristics and superb isolation. It is constructed using Roger-RT5880 substrate's material, which has a relative permittivity (εr) =2.2 and a loss tangent (δ) =0.0009. The dimensions of the antenna are 35 × 90 × 1.5 mm³. The antenna's performance was tested using Computer Simulation Technology (CST), demonstrating operation over a wide frequency bandwidth from 2.76 GHz to 8 GHz, with two operating frequencies at 3.5 GHz and 5.8 GHz. MIMO antenna exhibited strong diversity characteristics, achieving a gain ˃ 4.5 dBi. The results of the simulation were validated, showing an envelope correlation coefficient (ECC) ˂0.001, a diversity gain (DG)₌10 dB, a channel capacity loss (CCL)˂0.2 bits/sec/Hz, a mean effective gain (MEG)₌-6 dB, and a total active reflection coefficient (TARC)˂ -10 dB across the bandwidth (BW). These results meet MIMO performance standards satisfactorily. The outstanding effectiveness and performance of the antenna, combined with its compact size, highlight its potential suitability for 5G communication networks.