Multi-band miniaturization and high isolation MIMO antenna design for 5G mobile phones

This paper designs a multi-band miniaturized and highly isolated MIMO antenna for 5G mobile phones. The antenna array is distributed on the long frame on both sides of the mobile phone. The dual-frequency operation (3.4-3.8GHz, 4.8-5.85GHz) is realized through the design methods of multi-branching and bending. By optimizing the array design, this paper realizes that the isolation degree between antennas is higher than 10dB and the envelope correlation coefficient in the working frequency band is less than 0.1 without adding any decoupling structure, and each antenna element has good radiation efficiency in the working frequency band. The evaluation results show that the new MIMO antenna proposed in this paper has a strong working efficiency and has certain reference significance for the design of 5G mobile phone antenna.