MIMO Antenna with Complete Self-Decoupling Antenna Pairs for 5G Mobile Terminals

This paper proposes a two-port antenna pair for fifth-generation (5G) mobile terminals. The antenna pair consists of a slot antenna and a dipole, and the operating frequency is 3.3–3.6 GHz. The simulated results show that the antenna pair can provide a high isolation of better than 47.6 dB, which demonstrates the complete self-decoupling capability. To verify the performance of the proposed antenna pair for mobile terminals, an 8 × 8 multiple-input multiple-output (MIMO) antenna system is successfully simulated. The simulated results show that the isolation of the entire system is greater than 12.9 dB and the envelope correlation coefficients (ECCs) are less than 0.2 in the whole system, while the antenna pair in MIMO system still has good isolation of better than 27.3 dB and ECCs closed to 0. The simulated total efficiencies of the slot antenna and dipole in MIMO system across the operating band are 66.1%–77.4% and 69.8%–81.1%, respectively. All the above results indicate that this compact self-decoupling MIMO antenna is a potential choice for 5G mobile terminals.