一种新的吸收边界条件及其在TLM法中的应用

A New Kind of Absorbing Boundary Condition and Its Application for 3-D TLM Method

基于 Z变换透射边界条件的统一理论 ,构成出一种新的能够适用于对称压缩顶点传输线矩阵法的吸收边界条件 ,并将它应用于导波问题的计算 .与 Higdon吸收边界条件相比 ,这种新的吸收边界条件不会产生假模 ,不需对时间偏移因子作任何修改而且更加精确有效 .

A new kind of absorbing boundary conditions based on the theory of generalized Z domain absorbing boundary conditions (Z ABCs) for the 3D TLM SCN method is presented. The results indicate that the Z ABCs show better performance than Higdon's ABC in suppressing instability caused by spurious modes. The different order coefficients of this new Z ABCs can be given by a recurrence formula.