A Quad-Band 4 × 4 MIMO Antenna Array for Millimeter-Wave 5G Communications

Abstract

In this research, a novel design of quad-band (28/38/60/73 GHz) multiple-input multiple-output (MIMO) antenna for fifth-generation (5G) communications. The proposed antenna has the dimension of 22$\times$ 22 $\times$ 0.787${mm}^{3}$. The single-element antenna consists of a modified T-shaped patch with slit an elliptical-slot on the elliptical-patch of the circular-slot bottom ground. The results demonstrate that the proposed design has high isolation with mutual coupling $(\lt -20$ dB) and has an omnidirectional radiation pattern. Also, the proposed antenna provides high diversity performance in terms of envelope correlation coefficient (ECC $\lt 0.003$ dB), diversity gain (DG $\gt 9.98$ dB), mean effective gain (MEG $\lt 3$ dB), and channel capacity loss (CCL $\lt 0.4$ bits/s/Hz) which ensure its effectiveness MIMO performance for 5G wireless applications.