【摘要】 针对非均匀等离子体包裹目标的电磁散射问题，提出了一种基于体射弹射线法的建模技术，重点研究电磁波在介质体中的传播特性及散射分析方法。针对在介质体中透射与反射射线数据量激增的问题，提出了基于迭代追踪加速技术以此提高体介质散射中透射反射射线的追踪效率。仿真实例表明，与传统弹跳射线法相比，体弹跳射线法能更快速准确地计算出等离子体目标的散射特性。采用所提出的技术研究了等离子体鞘套对阿波罗号返回舱雷达散射截面积的影响，验证了等离子体对目标雷达散射截面积有一定缩减作用。更多还原

【Abstract】 In this paper, the electromagnetic(EM) scattering characteristics of inhomogeneous plasma-coated target are studied by volumetric shooting and bouncing rays(VSBR) method. The paper focuses on the propagation characteristics of EM waves in medium and the analysis methods of scattering. In order to improve the ray tracing efficiency in plasma medium, an iterative raytracing acceleration technique is proposed to solve the problem that the amount of transmitted and reflected rays increases rapidly. Some simulations show the volumetric shooting and bouncing rays method can calculate the scattering characteristics of target coated with inhomogeneous plasma more quickly and accurately compared with the traditional shooting and bouncing rays method. Furthermore, the influence of plasma sheath on the radar cross section of Apollo re-entry capsule is studied with the proposed method, and it is verified that the plasma has a certain reduction effect on the target radar cross section.更多还原