电大尺寸对象电磁散射的一种混合数值算法

A Hybrid Technique to Calculate the Scattering of Electrically Large Body

将频域Mur吸收边界条件和MEI方法相结合,提出了用MEI+频域Mur吸收边界条件的混合方法,计算一类有规则光滑表面和复杂突变表面相结合的电大尺寸对象的电磁散射.该方法利用频域Mur吸收边界条件,使用了MEI方法截断边界条件混合计算对象的散射场.即在简单区域使用频域Mur吸收边界条件,在复杂区域则使用MEI方法,这样既避免了简单区域的MEI系数计算,又避免了在复杂区域单纯使用频域Mur吸收边界条件的误差比较大的问题.数据结果表明,该混合数值算法是有效的.

A hybrid technique to calculate the scattering of electrically large bodies is presented by combining Mur method in frequency-domain with MEI method. Truncated boundary condition of the part of domain is first calculated by using Mur method in frequency-domain instead of MEI, and then the rest of the domain is calculated by using MEI method. The numerical results show the validity of the method.