基于矩量法的三维导体目标散射问题的研究

Research on MoM based electromagnetic scattering problems from 3D perfectly electric conductor

将CAD(computer aided design)建模与矩量法相结合并应用于三维导体目标散射问题的研究。在CAD建模的基础上,得到了符合电磁计算要求的几何数据,并以此为基础计算得到表面电流,散射场等电磁参数。分析了非奇异积分的数值解及奇异积分的解析解,指出了奇异积分出现的具体条件,给出了几种典型三维导体结构的雷达反射截面(radar cross section,RCS),平面天线输入阻抗与经典理论计算进行了比较。仿真结果表明,CAD建模与矩量法相结合的算法对于计算三维导体散射场,RCS等相关电磁特性具有广泛的适用性及准确性。

The MoM CAD modeling were combined,and then were applied to electromagnetic scattering problems from the 3D electric conductor.Based on the CAD modeling,geometric data for electromagnetic numerical calculation was provided,and surface current and scattering field were calculated.The non-singularity numerical solution,singularity analytic solution and the threshold for the singularity integration were put forward.Some typical 3D conductors RCS,plane antennas input impedance were simulated,whose results were compared to the classic theoretic ones.All the simulation results are widely applicable and acceptably accurate for 3D conductor scattering problems.