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| 天线近场球面扫描面形测量技术及相关问题研究 | |
| Alternative Title | Antenna surface measurement by near-field hemispherical scanning and related problems |
叶骞2; 王博阳1; 杨德金2,4; 孟国香1; 王娜3
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| 2024 | |
| Source Publication | 中国科学:物理学 力学 天文学
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| ISSN | 1674-7275 |
| Volume | 54Issue:1Pages:219505 |
| Contribution Rank | 4 |
| Abstract | 本文提出了一种通过扫描天线近场半球表面电场强度来获取天线面形分布的新方法,该方法无需测量相位、扫描面积小、可实现全姿态测量.研究将微分几何理论与几何光学方法相结合,推导出了球面近场幅值分布与表面变形间直接映射关系的解析形式-幅值变形方程,并基于有限差分法和傅里叶变换法对方程进行求解,使用几何光学数值仿真证明了幅值变形方程的准确性和测量方法的有效性.结合本文提出的扫描机构设计从扫描分辨率限制、探头定位误差和测量信噪比等角度分析验证了测量方案的可行性,并重点使用基于物理光学和物理绕射理论的数值仿真模拟了整体测量精度.此外引入奇异值分解去噪方法降低了低信噪比对测量精度的影响. |
| Other Abstract | This paper proposed a new method for obtaining the antenna surface deformation by scanning the electric intensity of a near-field hemispherical surface. This method does not need to measure the aperture phase and can realize full attitude measurement with a small scanning area. This study developed a deformation-amplitude equation by combining the differential geometry theory and geometric optics method to establish a direct relation between surface deformation and amplitude distribution. The amplitude deformation equation can be solved using the finite difference method and fast Fourier transform method. Numerical simulation results proved the accuracy of the amplitude deformation equation and the effectiveness of the proposed measurement method. Furthermore, the singular value decomposition method was introduced to reduce the influence of low signal-to-noise ratio on the measurement accuracy. |
| Keyword | 射电望远镜 天线 几何光学 数学过程 |
| URL | 查看原文 |
| Indexed By | CSCD ; 中文核心期刊要目总览 |
| Language | 中文 |
| WOS ID | CSCD:7658830 |
| CSCD ID | CSCD:7658830 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/7616 |
| Collection | 射电天文研究室_脉冲星研究团组 |
| Affiliation | 1.上海交通大学机械与动力工程学院，上海 200240; 2.中国科学院上海天文台，上海 200030; 3.中国科学院新疆天文台，乌鲁木齐 830011; 4.重庆交通大学土木工程学院，重庆 400074 |
| Recommended Citation GB/T 7714 | 叶骞,王博阳,杨德金,等. 天线近场球面扫描面形测量技术及相关问题研究[J]. 中国科学:物理学 力学 天文学,2024,54(1):219505. |
| APA | 叶骞,王博阳,杨德金,孟国香,&王娜.(2024).天线近场球面扫描面形测量技术及相关问题研究.中国科学:物理学 力学 天文学,54(1),219505. |
| MLA | 叶骞,et al."天线近场球面扫描面形测量技术及相关问题研究".中国科学:物理学 力学 天文学 54.1(2024):219505. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 叶骞-2024-天线近场球面扫描面形测量（2024KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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