对包含多源结构错误的抛物线圆柱形天线的高效模式建模方法
Shiyue Xue1,2,3, Weibin Liang1,2, Mingming Zhu4
1Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China.
Sensors (Basel, Switzerland)
|February 13, 2026
概括
这项研究引入了一种用于抛物线圆柱形天线的新模型,以准确预测辐射模式,即使存在结构错误. 一个简化的模型显著提高了诸如太空合成孔径雷达 (SAR) 等应用程序的计算效率.
科学领域:
- 电磁学和天线理论
- 航空航天工程 航空航天工程
- 信号处理 信号处理
背景情况:
- 抛物线圆柱形天线对于地球观测和太空合成孔径雷达 (SAR) 非常重要,因为它们的简单性和效率.
- 在制造和操作过程中的结构错误会降低现有的天线图案模型的准确性.
- 准确的建模对于可靠的性能和这些天线的轨道校准至关重要.
研究的目的:
- 为抛物线圆柱形天线开发一个全面的辐射模式模型,该模型可以解释料和反射器的结构错误.
- 为精确的模式预测和轨道校准提出了一种简化,计算效率高的模型.
- 研究不同结构错误对天线性能和模型准确性的影响.
主要方法:
- 利用场叠加原理和物理光学 (PO) 方法来计算反射的远场图案.
- 开发了一种直接集成模式模型,其中包括来自料和反射器错误的组合相位效应.
- 提出了一种基于弗雷内尔近似的简化模型,以减少计算复杂性,同时保持准确性.
- 引入了分区校准方法和用于增强偏差补偿和错误相关性分析的经验参数.
主要成果:
- 简化模型准确地预测了正常化的振幅和相位,比直接集成模型显著提高了计算效率.
- 反射器结构错误被确定为影响天线整体性能的主导因素.
- 简化模型的预测准确性被发现对结构错误更为敏感.
- 简化模型证明了对超过波长的结构错误的耐受性.
结论:
- 拟议的简化模型为具有结构错误的抛物线圆柱形天线提供了直接集成的计算效率高和准确的替代方案.
- 该研究为空间天线的耐受性设计,性能保证和轨道校准提供了一个强大的框架.
- 这些发现对于提高SAR系统和其他地球观测应用的可靠性和准确性至关重要.
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