Design and analysis of mm-wave MIMO antenna with DGS for 5G applications

Abstract In this paper, a low mutual coupling multiple-input and multiple-output (MIMO) antenna design is suggested for 5G applications. It consists of 1 × 2 array slotted E-shaped components positioned in the center of the substrate microstrip patch antenna profile. The substrate used is a Rogers RT-5880, which has a thickness of 0.254 mm and a dielectric constant of 2.2 along with a loss tangent of 0.0009. The frequency range that the proposed MIMO antenna arrays span, 37 GHz, is designated for millimeter-wave mobile applications in 5G. By adopting a defective ground structure (DGS), the mutual interaction between the antenna elements is reduced. Each antenna element is positioned one row ahead of the other. The gain of the suggested antenna array is 7.441 dBi, but using DGS, it increases that gain to 7.884 dBi. It is found that the suggested antenna array's radiation efficiency is nearly 90% within the intended operational frequency range. Performance measures for the proposed MIMO antenna, including diversity gain (DG) and envelope correlation coefficient (ECC), are observed and are determined below the standard threshold. Finally, a comparison between the suggested design and previous research is shown, where the suggested antenna is performed better in various performance metrics.