回路线栅法分析目标散射场

提出了求解复杂飞行器目标谐振区散射场的回路线栅法.回路线栅法的基本思想是以其上流动着感应电流的三维线栅回路网格来模拟在入射波激励下的连续金属表面,与以往单独分段的线栅模型不同,本文利用构成闭合回路的线栅构造每一个金属面元,而不采用单独分段线栅电流表示面元的被激电流,从而使得基尔霍夫定律在每个节点处能够得到自动满足.通过分析目标几何特性建立相应的回路线栅电磁模型,并利用共轭梯度快速傅利叶变换法(CGFFT),给出谐振区复杂飞行器目标的雷达散射截面(RCS)结果.

Reseanloop Model for the Scattering Field of the Target

The resean loop mothed for solving the scattering field of complex targets in resonance region is presented.The idea of wire grid is using the induction current flowing on the three dimensional wire grids to simulate the continuous conduct surface excited by the incident electromagnetic wave.Unlike the single wire grid model published before,we use the resean loop model to simulate every continuous conduct facet,so the Kirhoff Law is automatically satisfied on each junction.Based on analyzing the geometric model of the targets,the RCS of complex aircrafts are obtained by using corresponding EM model and CGFFT in resonance region.Numerical results verify the correctness and usability of the resean loop electromagnetic model presented by this paper.