基于FDTD的多层网格逐步逼近计算电磁场

A Multi-Grid Approach to Calculating Electromagnetic Fields with FDTD

将基于FDTD的由粗到细网格逐步逼近计算电磁场的方法应用于内置带裂缝的金属谐振腔的电磁场的计算,并研究网格从大到小的变化过程中,始终保持谐振腔边界面的位置不变,该方法的计算精度和效率.结果表明:该方法与FDTD方法计算电磁场的精度一致,但效率明显提高.

A coarse-to-fine multi-grid approach to calculating electromagnetic field with FDTD is applied to calculate the time-harmonic electromagnetic field in the presence of a PEC resonant structure with a split. The accuracy and the related efficiency are researched in such a manner that the boundary of the resonant structure imposed on the electromagnetic field is at the same places in both grids. The obtained results have the same accuracy as those ones achieved with a conventional merely fine grid FDTD run. But the ,elated efficiency is much efficient than the latter.