In order to meet the communication requirements of multi-band base station antennas, an ultra-wideband dual-polarized 5G base station antenna integrating n77/n78/n79 frequency bands is proposed. The main radiator of the antenna is composed of two pairs of arrow cross-dipoles placed at ± 45°, and the antenna impedance bandwidth is guaranteed by adding four rectangular parasitic patches and opening rectangular slots. The designed parasitic patch expands the bandwidth while enhancing the dual-polarization characteristics of the antenna. Furthermore, a box-type reflector is employed, which facilitates obtaining high gain and good half-power beamwidth. Finally, a sample of the antenna is fabricated and tested. As shown in the measurement results, the − 10 dB impedance bandwidth reaches up to 51.9% (3.0–5.1 GHz) with the antenna isolation in the working frequency band better than 24 dB. In the frequency range of 3.3–5 GHz, the antenna achieves a high gain of 9 dB and a HPBW of 64 ± 2°, and the cross-polarization ratio is better than 21 dB overall. Compared to traditional base station antennas, this antenna has significant advantages in terms of gain and HPBW.

为了满足多频段基站天线的通信需求，提出了一种集成n77/n78/n79频段的超宽带双极化5G基站天线。天线主辐射体由两对±45°放置的箭头交叉偶极子组成，通过添加四个矩形寄生贴片和开矩形槽缝来保证天线阻抗带宽。设计的寄生贴片扩大了带宽，同时增强了天线的双极化特性。此外，采用箱式反射器，有利于获得高增益和良好的半功率波束宽度。最后，制作天线样品并进行测试。测量结果显示，−10dB阻抗带宽达到51.9%（3.0-5.1GHz），工作频段天线隔离度优于24dB。在3.3~5 GHz频率范围内，天线实现了9 dB的高增益和64±2°的HPBW，交叉极化比总体优于21 dB。与传统基站天线相比，该天线在增益和HPBW方面具有显着优势。