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计算电大尺寸复杂腔体电磁散射时,迭代物理光学法与矩量法的混合方法(IPO-MM)是有效方法之一。为了提高该算法的效率,在IPO中使用快速远场近似(FAFFA)技术加速,在腔体复杂部分的MM中使用特征基函数法(CBFM)技术加速。在新的IPO/FAFFA-CBFM混合法中,利用分块技术对求解矩阵进行降秩,使用传统的求解方法即可求解方程,而不需要预条件处理与低频法的迭代求解方法。结果表明,新的混合方法有更高的计算效率和在单机平台上解决更大复杂腔体电磁问题的能力。
When calculating the electromagnetic scattering of electrically large complex cavity, the hybrid method of iterative physical optics and moment method (IPO-MM) is one of the effective methods. In order to improve the efficiency of the algorithm, Fast Field Approximation (FAFFA) is used in the IPO to speed up and the feature-based function method (CBFM) is used to speed up the MM in the complex part of the cavity. In the new IPO / FAFFA-CBFM hybrid method, the block matrix technique is used to reduce the rank of the solution matrix, and the traditional solution method can be used to solve the equation without the iterative solution method of preconditioning and low frequency method. The results show that the new hybrid method has a higher computational efficiency and the ability to solve electromagnetic problems in larger and complex cavities on a single platform.