基于迭代散射算法的柱体阵列散射场分析

该文基于迭代散射算法(ISP)对柱体阵列的散射场进行分析。通过矢量柱面波函数展开，根据理想导体表面边界条件，建立柱体表面入射场与散射场的关系式。将前一次迭代时柱体阵列的近区散射场作为下一次迭代的入射场，推导出柱体阵列散射场系数间的迭代关系。通过分析不同迭代次数下2~4个柱体的散射场，确定3次迭代即可保证算法的准确度。对比数值结果表明，迭代散射算法具有与矩量法(MoM)结果同等的准确度，并具有明显优于矩量法的计算速度。

Analysis on Scattering Characteristics of Cylinder Array Based on Iterative Scattering Algorithm

Based on Iterative Scattering Process (ISP) algorithm, the scattering characteristics of cylinder array are analyzed. The relationship between incident field and scattering filed can be evolved from the cylindrical harmonic functions under surface boundary condition of perfect conductor. With the previous iterative scattering fields among cylinders being the incident field next iteration, the coefficient relationship of scattering fields among cylinder array is derived. After analyzing the scattering fields of two or four cylinders within different iterations, it can be obtained that the calculated result of ISP algorithm keeps high accuracy with only three iterations. The results compared with numerical methods show that ISP algorithm and Method of Moments (MoM) agree well, whereas ISP algorithm has an observably faster calculated pace.