基于多模融合的宽带5G基站天线设计  

Design of 5G Broadband Base Station Antenna Based on Multimode Fusion

作　　者：刘建乐 张冰 LIU Jianle;ZHANG Bing(College of Electronics and Information Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学电子信息学院,四川成都610065

出　　处：《山西大学学报（自然科学版）》2024年第5期1054-1061,共8页Journal of Shanxi University(Natural Science Edition)

基　　金：毫米波国家重点实验室开放课题(K202322)。

摘　　要：针对5G移动通信多频段的需求,本文设计了一款适用于5G基站应用的宽带双极化基站天线单元。该基站天线单元由两对加载了箭头形枝节的环形偶极子、两条Y形微带馈线与同轴馈线构成。利用多模融合的原理,通过加载箭头形枝节与偶极子臂形成强耦合,激励起高频谐振模式,进一步实现天线的宽带化。对天线实物进行加工测试,天线在3.4 GHz~5.1 GHz的工作频段内,端口反射系数<-10 dB,端口隔离度优于21 dB,带内增益(8.6±0.8)dBi,实测半功率波束宽度为(67°±3°),交叉极化鉴别率高于22 dB,测试结果与仿真吻合良好。所设计的宽带双极化基站天线覆盖3.4 GHz~3.8 GHz、4.4 GHz~5 GHz的双5G通信频段,有助于解决站址资源紧张的基站部署难题。Aiming at the multi-band requirements of fifth-generation(5G)mobile communications,this paper designs a broadband dual-polarized base station antenna suitable for 5G base station applications.The base station antenna consists of two pairs of loop dipoles loaded with arrow-shaped branches,two Y-shaped microstrip feedlines and coaxial feedlines.Using the principle of multimode fusion,the broadband performance of the antenna is achieved by loading arrow-shaped branches,which generate a strong coupling with the dipole arm and excites a high-frequency resonant mode.The antenna is fabricated and tested,and the measured results show that the antenna has a port reflection coefficient is less than-10 dB,the port isolation is better than 21 dB,the in-band gain is(8.6±0.8)dBi,the half-power beamwidth is 67°±3°,and the cross-polarization discrimination is higher than 22 dB in the operating band of 3.4 GHz-5.1 GHz.The designed broadband dual-polarized base station antenna covers the dual 5G communication bands of 3.4 GHz-3.8 GHz and 4.4 GHz-5GHz,which can contribute to solve the deployment problem of base stations with tight site resources.

关 键 词：基站天线 高频谐振模式 宽带天线 

分 类 号：TM931[电气工程—电力电子与电力传动]