面向5G微基站的双频双极化电磁偶极子天线设计  

Design of dual-band dual-polarized magneto-electric dipole antenna for 5G microcell base station

作　　者：祝聪聪 王斌[1] 廖晨阳 苏东 ZHU Congcong;WANG Bin;LIAO Chenyang;SU Dong(Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学,重庆400065

出　　处：《电波科学学报》2020年第5期769-775,共7页Chinese Journal of Radio Science

基　　金：国家自然科学基金(No.41606203);重庆市研究生科研创新项目(No.CYS19266)。

摘　　要：文中提出并设计了一款应用于5G微基站的双频双极化电磁偶极子天线,工作带宽完整覆盖了长期演进(long term evolution,LTE)技术的主要频段和5G的全部中频段.该天线首先采用正交放置的渐变式Γ形馈电线对两个交叉放置的电磁偶极子馈电实现双频双极化,随后通过在电偶极子上添加H形缝隙有效扩展了低频段的带宽,最后创新性地引进具有电容性质的圆形寄生贴片将高频频点降低.此外,利用一款添加金属围栏的反射板来改善天线增益和辐射方向图的稳定性.测试结果表明:该天线S 11,22<-10 dB的阻抗带宽为58.2%(2.11~3.84 GHz)和8.9%(4.72~5.16 GHz),端口隔离度(|S 12|)高于25 dB,双频段内的平均增益分别为8.7 dBi和7.2 dBi;天线E面的半功率波瓣宽度在整个工作频带内的变化为61°±6°,交叉极化比高于20 dB.仿真与测试结果达到了良好的一致性.该天线结构简单、性能优良,可以作为LTE/5G室内基站天线的良好的候选.A novel dual-wideband dual-polarized magneto-electric(ME)dipole antenna for 5G microcell base station is proposed,the bandwidth of which can completely cover the long term evolution(LTE)main band and 5G mid-band.By using a pair of orthogonal ME dipoles andΓ-shaped tapered cross feeding lines,the initial antenna achieved dual-band and dual-polarized.Then,four H-shaped slots,added in electric dipoles,effectively extend the lower impedance bandwidth.Finally,a circular parasitic patch with capacitive properties is innovatively loaded above the ME antenna,which obviously reduces the high resonant frequency.Meanwhile,a box-shaped reflector is employed to achieve stable gain and radiation pattern.As a result,the measured results show good achievements of dual-wideband of 58.2%(2.11-3.84 GHz)and 8.9%(4.72-5.16 GHz)with S 11,22<-10 dB,high isolation(|S 12|>25 dB)and high gain(9.3 dBi and 7.2 dBi)in the these two bands.In addition,a stable radiation pattern with half-power beam width(HPBW)of 61°±6°and high cross polarization discrimination(XPD)(>20 dB)on the E-plane are realized over the dual-band.Moreover,with simple structure and excellent performance,the proposed antenna can be used as a good candidate for the LTE/5G microcell base station antenna.

关 键 词：电磁偶极子天线 5G微基站 双频段 双极化 寄生贴片 

分 类 号：TN802[电子电信—信息与通信工程]