An overlapping domain decomposition method （DDM） and finite element method（FEM）/boundary element method（BEM） are combined to compute the scattering property of two dimensional anisotropic dielectric cylinder. The boundary element method is used to analyze the field external to the cylinder. The domain of dielectric cylinder is divided into several subdomains and the finite element method is applied for analyze those subdomains. Coupling of different subdomains is achieved by transmission condition on the interface. The muhifrontal method is introduced to solve the FEM equations to improve speed. The inward looking approach with multifrontal algorithm is utilized to solve the linear equation of hybrid finite element-boundary element method. The computation results show that the required computer memory is greatly reduced by using DDM.%应用重叠型区域分解法（DDM）结合有限元（FEM）和边界元法（BEM）计算二维各向异性介质柱电磁散射.对介质柱外的无限大区域采用边界元法分析,将介质柱所在区域分解为若干个重叠的子域,每个子域用有限元法分析,各子域间通过传输条件进行耦合.为了提高计算速度,引入了多波前法求解有限元方程,并用内观法结合多波前法解有限元和边界元耦合方程组.数值结果表明,应用区域分解法可以减少程序运行时对计算机内存的需求.
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