适用于5G通信的宽带毫米波MIMO天线的设计

Design of Broadband Millimeter Wave MIMO Antenna Suitable for 5G Communication

针对当前5G通信要求的高速率,提出了一种加载水平条形枝节和蝶形寄生单元的倒L型偶极子宽带MIMO天线。该天线以具有不完全地板的倒L型偶极子天线为辐射主体,加载水平条形枝节有效拓展了天线带宽,在天线上端加载一个蝶形寄生单元,有效提升了天线增益;最后将两个天线单元正交摆放,得到了MIMO天线的最终结构。对天线进行仿真与优化,最终结果表明,天线相对带宽达到40.9%(23.1~35 GHz),工作频带内的隔离度均小于-19 dB,带内增益为5.3~7.13 dBi。与引文其它天线相比,目标天线尺寸较小,具有较宽的频带和较高的增益,同时具有良好的隔离度和定向性。天线实测结果与仿真结果基本吻合,验证了其研究与应用价值。

Aiming at the high speed required by the current 5 G communication, an inverted L-shaped dipole broadband MIMO antenna loaded with horizontal strip branches and butterfly parasitic elements is proposed. The antenna uses an inverted L-shaped dipole antenna with an incomplete floor as the radiation body, and loading horizontal strip branches effectively expands the antenna bandwidth, loading a butterfly parasitic element on the upper end of the antenna effectively improves the antenna gain;Through simulation and optimization of the antenna, the final results show that the relative bandwidth of the antenna reaches 40.9%(23.1-35 GHz), the isolation in the operating band is less than-19 dB, and the in-band gain is 5.3-7.13 dBi. Compared with other antennas in the reference, the target antenna has a smaller size, wider frequency band and higher gain, and also has good isolation and directivity. The measured results of the antenna are basically consistent with the simulation, verifying its research and application value.