一种新的渐进网格算法及其在共面波导FDM建模中的应用

A New Progressive Discretization and Its Application in the FDM Modeling of Coplanar Waveguide

在利用一种基于准静态的有限差分法(FDM)对共面波导(CPW)进行电磁仿真和建模的过程中,为了解决均匀网格在三维FDM计算中仿真时间较长的问题,并对常规的非均匀网格算法在算法复杂性和效率方面进行改进,我们提出了一种简单易行的渐进网格算法,取得了精度和效率的较好折中。同时利用这种改进的FDM电磁仿真和建模算法成功地完成了对CPW传输线结构、开路结构和短路结构的仿真和模型参数提取。文中通过对一个具体的CPW短路结构建模的算例分析,在进行算法验证的同时,也对这种新算法在应用方面提出了一些具体的参考准则。

In the modeling of CoPlanar Waveguide （CPW） by a quasi-static Finite Difference Method （FDM）, to resolve the problem of too much simulation time with equidistant discretization in the 3D FDM simulation and improve the non-equidistant discretization in the algorithm complexity and efficiency, a new progressive discretization is put forward, which is extremely easy to implement with good compromise of precision and efficiency. And the CPW transmission line, open end and short end are modeled successfully based on the improved FDM. After a special modeling of CPW short end, the progressive discretization is proved to be practicable. At the same time, some particular references are also presented as in some applications.