| 引用本文: | 吴守天，郑治，郑雨阳. Ku频段全金属圆极化平板天线设计[J]. 雷达科学与技术, 2021, 19(6): 717-721.[点击复制] |
| WU Shoutian, ZHENG Zhi, ZHENG Yuyang. Design of Ku-Band All-Metal Circularly Polarized Planar Antenna[J]. Radar Science and Technology, 2021, 19(6): 717-721.[点击复制] |
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| 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2,3dB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。 |
| 关键词: 高效率 高增益 圆极化 平板天线 |
| DOI：DOI:10.3969/j.issn.1672-2337.2021.06.011 |
| 分类号:TN821 |
| 基金项目: |
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| Design of Ku-Band All-Metal Circularly Polarized Planar Antenna |
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WU Shoutian, ZHENG Zhi, ZHENG Yuyang
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Institute of Space Integrated Ground Network, Hefei 230088, China
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| Abstract: |
| 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. |
| Key words: high efficiency high gain circular polarization planar antenna |
