Ku频段全金属圆极化平板天线设计  

Design of Ku-Band All-Metal Circularly Polarized Planar Antenna

作　　者：吴守天 郑治 郑雨阳 WU Shoutian;ZHENG Zhi;ZHENG Yuyang(Institute of Space Integrated Ground Network, Hefei 230088, China)

机构地区：[1]天地信息网络研究院(安徽)有限公司,安徽合肥230088

出　　处：《雷达科学与技术》2021年第6期717-721,共5页Radar Science and Technology

摘　　要：本文介绍一种Ku频段全金属圆极化平板天线的设计,采用多层金属波导腔体结构降低天线剖面,由上到下依次为辐射层、谐振层、功分馈电网络层,其中,辐射层为4×4个斜六边形开口波导腔体,将线极化信号扭转为圆极化波辐射;谐振层利用梅花状波导腔体有效展宽了天线的阻抗带宽,功分馈电网络层为紧凑型一分四波导功分器。通过电磁仿真软件Ansoft HFSS进行仿真设计,仿真结果表明,该天线相对阻抗带宽为21.8%,在工作频带内,驻波小于2,3 dB轴比带宽为5.4%,天线效率大于80%。根据仿真设计结果,加工了一套12×12单元天线阵列,对阵中天线单元进行测试,测试结果与仿真结果符合较好。In this paper,a Ku-band all-metal circularly polarized planar antenna is presented.The antenna is a multilayer structure of waveguide cavity with low profile,mainly including three parts:the radiation layer,the resonant layer,and the feed-network layer,from top to bottom,respectively.The radiation layer is composed of 4×4 oblique-hexagon open waveguide cavity to change the linearly polarized signal to circularly polarized wave.The resonant layer uses the plum-blossom waveguide cavity to enhance the impedance bandwidth.The feed-network layer is a compact four-way power divider.Using Ansoft HFSS to design and simulate,the results show the relative impedance bandwidth is 10.3%with VSWR below 2,the relative axial ratio bandwidth is 5.4%,and the radiated efficiency is higher than 80%.On basis of the simulated results,we fabricate a 12×12 array.The elements in the array are measured.Compared with simulations,the measurements reveal good agreement.

关 键 词：高效率 高增益 圆极化 平板天线 

分 类 号：TN821[电子电信—信息与通信工程]