典型植被的高效电磁全波分析方法研究

(地物的电磁散射特性一直以来在遥感、探测、反隐身等领域具有重要的应用价值。由于地物类型繁多且分布不均匀, 随着计算场景的扩大, 理论模型变的越来越复杂, 计算量也会直线上升。在这种情况下, 现有计算平台和建模能力不足以模拟并准确地得到场景环境较大时典型地物的电磁散射特性, 导致理论模型的预测值与实验测量数据相差甚远。因此, 急需建立一种高效的全波电磁分析方法, 从而能够精确、高效地分析典型地物的电磁散射特性, 为实际大型地面场景特性仿真提供模型与理论支撑。)本文建立了求解TDS、介质的混合积分方程, 采用周期格林函数技术, 实现大场景下典型植被的雷达散射截面积快速计算。

Study on electromagnetic analysis of an efficient full-wave numerical method for typical vegetation

The electromagnetic scattering from vegetation plays an important role in remote sensing, detection, anti-stealth and other fields. Due to its various types and inhomogeneous distributions, the numerical model will become more and more complex and the amount of computation goes up with the scenario increasing. In this case, the electromagnetic scattering characteristics of typical ground plants in large environment cannot be predicted with high accuracy under limited computing platforms and modeling capabilities. As a result, there is a big difference between the numerical and experimental results. Therefore, it is urgent to establish an efficient electromagnetic full-wave analysis method to obtain the electromagnetic scattering characteristics of typical vegetation. In this paper, the mixed integral equation for thin dielectric sheet and dielectric is established, and the periodic Green's function technique is used to realize the fast calculation of radar cross section of typical vegetation in large scene.