电大弱散射介质的体积分算法  

Volume integral method for calculation of weak scattering from electronically large dielectric targets

作　　者：樊君[1] 雷振亚[1] 谢拥军[1,2] 李晓峰[1] 

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071 [2]北京航空航天大学电子信息工程学院,北京100083

出　　处：《西安电子科技大学学报》2016年第3期38-42,66,共6页Journal of Xidian University

基　　金：国家自然科学基金资助项目(60771040);教育部新世纪优秀人才基金资助项目(NCE950T-40-0)

摘　　要：针对电大弱散射介质体的高频散射场计算问题,基于散射场的体积分方程,分别从矢量波动方程和标量波动方程出发,将通常用于求解逆散射问题的波恩近似和里托夫近似引入其中,推导出相应求解电大弱散射介质体的散射场的近似公式.通过利用近似条件简化了散射场、入射场和总场之间的相互作用,在保证一定的计算精度的前提下,避免了传统方法中求解矩阵的复杂步骤,从而节约了计算机资源及时间消耗.算例的数值结果证明了该方法的有效性.To calculate the high-frequency scattering fields from the weak scattering dielectric objects, starting with the vector and scalar wave equation separately, Born approximation and Rytov approximation are introduced to directly compute the radar cross section and extended to the high-frequency analysis of the electrical large weak scattering dielectric objects based on the volume integral equation. By weakening the mutual actions between the scattering field, the incident field and the total scattering field through this approximation, the complicated procedures for solving the matrix by the traditional method can be avoided, thus saving the computational resources and the time consumption. Numerical results show that the approach is accurate and effective.

关 键 词：非均匀 介质目标 雷达散射截面 波恩近似 里托夫近似 

分 类 号：TN823[电子电信—信息与通信工程]