摘要:提出一种针对任意形状目标散射矩量法计算的精度验证方法.根据等效原理,建立介质目标积分方程.令介质分界面两侧的介质参数相同,推导出入射等效源在介质体外产生的场为0.利用这种性质,对任意形状目标散射问题矩量法计算精度进行验证.对球和正8面体等算例进行的数值实验,验证了不同奇异点处理方法下介质目标积分方程的精度.数值实验证明了转移法和坐标变换法的精度优于提取法.结果同时表明所提出验证方法的有效性和通用性.
A method to validate the accuracy of method of moments (MoM) for arbitrarily shaped targets was proposed. Based on equivalence principle, integral equations for dielectric objects were established. The non-radiating property of incident sources was derived by setting the medium on both sides of the interface the same. According to this property, the accuracy of MoM for arbitrarily shaped targets can be investigated. Numerical experiments were conducted on sphere and octahedron targets. It is validated that among three singularity treatments, nabla operator transfer and coordinate transformation perform better than extraction in terms of accuracy. The results also show that the proposed method is possessed of applicability and generality.