一种可用于5G点对点通信的宽频双极化阵列天线

A Broadband Dual-Polarized Array Antenna for 5G Point-to-point Communication

本文设计了一款高增益宽频双极化天线。该天线采用多层辐射贴片的结构,拓展天线的带宽,并用一对正交分布的微带线直接馈电在辐射贴片上,增强天线极化隔离度,形成双极化特性。通过设计馈电网络,组成阵列后实现良好的带宽与定向辐射特性,并且具有良好的端口隔离度和辐射极化纯度。实测结果表明,小于-10dB的阻抗带宽为18.18%(5.0~6.0GHz),带内平均增益为15.5dBi,全频段端口隔离度小于-30dB,主瓣方向上的主极化电平与交叉极化电平相差40dB,带内增益波动小于3dB,具有良好的增益平坦度。该天线适合作为5G通信系统中的天线单元,具有实用价值。

In this paper,a high-gain broadband dual-polarized antenna is proposed.The antenna adopts a multi-layer radiation patch structure to expand the bandwidth.A pair of orthogonal microstrip lines are directly feeding the radiation patch to enhance the polarization isolation of the antenna and form a dual-polarization characteristic.The array is composed to achieve good bandwidth and directional radiation characteristics through feed network design.In addition,it has good port isolation and radiation polarization purity.The measured results show that the impedance bandwidth(<-10dB)of the antenna is 18.18%(5.0~6.0GHz),the average in-band gain is 15.5dBi,the full-band port isolation is less than-30dB,and the difference between main polarization level in the main lobe direction and cross-polarization level is 40dB.In addition,it has an in-band gain fluctuation of less than 3dB,which shows good gain flatness.The antenna has practical value and is suitable to be used in 5G communication system.