Wideband Decoupled 8-Element MIMO Bezel Antenna Pairs for 5G Mobile Terminals

Abstract

Abstract: This research presents an 8-port 3.6 GHz multiple-input multiple-output (MIMO) cell phone bezel antenna for 5G mobile communication. Methods: Each antenna unit consists of a Chinese character "卫". In order to reduce the mutual coupling between MIMO units, a defective ground structure (DGS) decoupling structure is employed in this research. By increasing DGS in between the antenna, the mutual coupling between adjacent antenna is greatly reduced. The transmission coefficient and surface current distribution account for the decoupling structure's efficacy. Results: Simulated and measured results show that the antenna can operate at Bluetooth/Wi-Fi (2.4-2.483.5 GHz), N77 (3.3-4.2 GHz), N78 (3.3-3.8 GHz), and N79 (4.4-5.0 GHz) frequencies. Conclusion: In addition, the proposed MIMO antenna has excellent diversity performance, good isolation between antenna units (>15 dB), and envelope correlation coefficient (ECC) lower than 0.01, due to which the proposed MIMO antenna can be an excellent choice for 5G cellular communications.