Six-Element MIMO Slot Antenna for 5G Metal-Frame smartphones

Abstract

A six-element multiple-input multiple-output (MIMO) slot antenna for fifth-generation (5G) metal-frame smartphones is presented in this paper. The proposed MIMO slot antenna array consisting of six identical slot antennas operates at 3.4-3.6 GHz while each slot occupies a small footprint of $45.2\times 1.0\times 0.2\ \text{mm}^{3}$. The simulated results exhibit an isolation of better than 13 dB without using any external decoupling structures and an envelope correlation coefficient (ECC) of lower than 0.06. The simulated total efficiencies of the MIMO array are better than 72.9%. The proposed antenna is expected to be applied in 5G smartphone applications.