金属空间桁架电磁窗桁杆截面选型分析与优化

辛泽宇; 周东方; 刘起坤; 余道杰; 律谱

doi:10.11884/HPLPB201830.170479

金属空间桁架电磁窗桁杆截面选型分析与优化

doi: 10.11884/HPLPB201830.170479

1.
中国人民解放军战略支援部队信息工程大学信息系统工程学院, 郑州 450001
2.
河南省资源与材料工业技术研究院, 郑州 450001

基金项目:

国家自然科学基金项目 61201056

国家自然科学基金项目 61271104

详细信息

作者简介:
辛泽宇(1993—)，男，硕士，主要从事天线罩电磁散射研究; 18810335107@139.com

中图分类号: TN956
计量
- 文章访问数: 1080
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- 被引次数: 0
出版历程
- 收稿日期: 2017-11-27
- 修回日期: 2018-01-18
- 刊出日期: 2018-06-15

Analysis and optimization of cross section of metal space frame bars in radome

1.
Institute of Information System Engineering, PLA Information Engineering University, Zhengzhou 450001, China
2.
He'nan Institute of Resources and Materials Industrial Technology, Zhengzhou 450001, China

摘要

摘要: 基于极化分解理论，分析了金属空间桁架电磁窗的桁杆散射场。针对桁杆截面选型，对比了圆截面桁杆与矩形截面桁杆的抗弯刚度与电磁散射特性。综合两种截面形状的优缺点，按照力电性能一体化设计要求，提出了将二者结合的圆角矩形截面优化设计方案，并对其辐照效应进行了计算仿真分析。结果表明：矩形桁杆由于棱边的电荷积聚效应，相较于圆柱形杆散射场副瓣电平较高，电磁性能较差，但抗弯能力更强，具有更好的保护性；圆角矩形的散射电平值小于矩形杆，同时具有超过圆柱形杆的力学特性，是提高电磁窗力电性能的可行方案。
- 天线罩 /
- 金属空间桁架 /
- 电磁散射 /
- 感应电流率 /
- 力电一体化
Abstract: Based on the polarization decomposition theory, the scattering field of the bar of the metal space frame is analyzed. The mechanical strength and scattering characteristics of the cylindrical bar and the rectangular bar are compared. Considering the advantages and disadvantages of the round bars and the rectangle bars, the optimal design of bars with rounded rectangular section is put forward. The radiation effect are simulated and analyzed. The results show that the rectangle bar has higher sidelobe level than the round bar due to the accumulation of electric charge on its edge, but performs better in resistance of bending. The rounded rectangle bar is a feasible scheme for improving both the mechanics and electromagnetics performance of the radome because of lower scattering intensity and higher mechanical strength.
- radome /
- metal space frame /
- EM scattering /
- induced current rate /
- electromechanical integration

HTML全文

图 1 桁杆截面示意图

Figure 1. Cross sectional view of metal bars

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图 2 在TM，TE波入射下的散射场分布图

Figure 2. Scattering field under TM and TE incidence

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图 3 圆角矩形截面示意图

Figure 3. Cross sectional view of rounded rectangle metal bar

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图 4 遮挡面积随入射角度变化曲线

Figure 4. Relationship between shielded area and incident angle

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图 5 三种桁杆散射近场分布图

Figure 5. Histogram of near-field scattering

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图 6 插入损耗随入射角度变化曲线

Figure 6. Relationship between loss and incident angle

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图 7 插入损耗随频率变化曲线

Figure 7. Relationship between loss and incident frequency

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