Institutional Repository of Radio Astronomy Research Laboratory
| 基于对称性时域近场物理光学法的大口径抛物面电磁散射特性分析 | |
| Alternative Title | Analysis of the electromagnetic scattering characteristics of large-aperture parabolic surface based on symmetrical time-domain near-field physical optics method |
邹棋1; 肖培1; 彭涣欢1; 刘萌瑶1; 李高升1; 刘奇2
| |
| 2024 | |
| Source Publication | 中国科学:物理学 力学 天文学
 |
| ISSN | 1674-7275 |
| Volume | 54Issue:1Pages:219511 |
| Contribution Rank | 2 |
| Abstract | 射电望远镜具有极高的灵敏性,干扰信号经由大口径抛物面结构反射后会对观测系统产生较大影响,其电磁兼容分析是一个不容忽视的研究问题.针对大口径抛物面近场耦合分析面临的电大尺寸问题,本文提出了一种基于空间对称性的时域近场物理光学法,解决了大口径抛物面近场电磁散射计算问题.阐述了物理光学近似法建立抛物面近场电磁散射模型的原理,利用局部格林函数近似法简化了计算过程,采用高斯数值积分方法进行面元积分,得到了焦点处近场散射场强.在此基础上,结合抛物面结构和应用场景,提出了基于空间对称性的高效计算方法.最后基于矩形金属板和小口径抛物面模型验证了算法的准确性和高效性,并对25 m大口径抛物面天线近场散射特性进行了计算分析.本文提出的基于对称性时域近场物理光学法为大型射电望远镜近场耦合分析提供了一种技术途径. |
| Other Abstract | Radio telescopes are highly sensitive, and the interference signals reflected by the large aperture paraboloid have a significant influence on the observing system. Further, electromagnetic compatibility analysis of radio telescopes is a research problem that cannot be ignored. To address the issue of electric-large target in the near-field coupling analysis of the large-diameter paraboloid, a spatial symmetry-based time-domain near-field physical optics method is proposed herein. The principle of establishing the near-field electromagnetic scattering model of the paraboloid by physical optics approximation is described. The local Green’s function approximation method was employed to simplify the calculation process, and the surface element integration was performed by the Gaussian numerical integration method. On this basis, combined with paraboloid structure and application scenarios, an efficient spatial symmetry-based calculation method is proposed. Finally, the accuracy and efficiency of the algorithm were evaluated based on a rectangular metal plate and a small-aperture parabolic, and the near-field scattering characteristics of the large-diameter (25 m) paraboloid antenna were analyzed. The proposed symmetric time-domain near-field physical optics method offers a technical approach for the near-field coupling analysis of large radio telescopes. |
| Keyword | 时域近场物理光学法 大口径抛物面 近场计算 电磁散射 |
| URL | 查看原文 |
| Indexed By | CSCD ; 中文核心期刊要目总览 |
| Language | 中文 |
| WOS ID | CSCD:7658836 |
| CSCD ID | CSCD:7658836 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/7617 |
| Collection | 射电天文研究室_微波技术实验室 |
| Corresponding Author | 肖培 |
| Affiliation | 1.湖南大学电气与信息工程学院，长沙 410082; 2.中国科学院新疆天文台，乌鲁木齐 830011 |
| Recommended Citation GB/T 7714 | 邹棋,肖培,彭涣欢,等. 基于对称性时域近场物理光学法的大口径抛物面电磁散射特性分析[J]. 中国科学:物理学 力学 天文学,2024,54(1):219511. |
| APA | 邹棋,肖培,彭涣欢,刘萌瑶,李高升,&刘奇.(2024).基于对称性时域近场物理光学法的大口径抛物面电磁散射特性分析.中国科学:物理学 力学 天文学,54(1),219511. |
| MLA | 邹棋,et al."基于对称性时域近场物理光学法的大口径抛物面电磁散射特性分析".中国科学:物理学 力学 天文学 54.1(2024):219511. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 邹棋-2024-基于对称性时域近场物理光（1941KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment