The fft of helmholtz equation on the regular domain is studied . and the multifrontal algorithm is used to solve the matrix equations in computational electromagnetics . finally , the finite - difference approximate forms of maxwell equations and the despres transmission condition are discussed 为了充分提高算法的计算效率，研究了规则区域上helmholtz方程的fft快速算法，以及有效地将多波前算法引入计算电磁学领域用于求解差分稀疏矩阵方程。
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The novel three - dimensional finite - difference approximations of mur ' s absorbing boundary conditions are also presented in frequency - domain . then the ddm based on fdfd is investigated in the applications of three - dimensional electromagnetics problems . and it is used to analyze the leaky wave antenna based on image nonradiative dielectric ( nrd ) guide 最后，阐述了maxwell方程组和划分区域的despres传输条件的频域差分格式建立，在截断边界上构造了三维频域mur条件的差分近似，探讨了基于频域有限差分的区域分解法在三维电磁问题中的应用实现，并将该算法用于分析一种基于nrd波导结构的漏波天线。
