分析多层介质多导体传输线的区域分解法

本文利用区域分解法 ,将直线法和有限差分法结合起来 ,用于计算多层介质中具有任意截面形状多导体传输线的电容和电感矩阵。通过在纯介质区域使用直线法 ,导体所在区域使用有限差分法分别进行求解 ,充分发挥两种方法各自的优越性。直线法中快速傅里叶变换的引入进一步提高了算法的计算效率。数值结果表明 :该方法是有效的 ,且计算时间与介质层的厚度无关。文中还研究了介质层分界面的不平整性对传输线电磁参数的影响。

Analysis of Multiconductor Transmission Lines in Multilayered Dielectric Media by Using Domain Decomposition Method

The method of lines (MoL) combined with the finite difference method (FDM) is used to calculate the capacitance and inductance matrices of the multiconductor transmission lines in multilayered dielectric media by using domain decomposition method. The sub region with pure dielectric layers is analyzed by MoL and the fast Fourier transform is introduced to reduce the computing time. In the mean time, the sub region with conductors is analyzed by FDM. Numerical results show that the algorithm is efficient, and the computing time is independent on the thickness of pure dielectric layers. The effect of the uneven dielectric interfaces on the electromagnetic parameters is also investigated.