NU-FDTD在腔体孔缝电磁耦合分析中的应用  

Application of NU-FDTD in Cavity Aperture Electromagnetic Coupling Analysis

作　　者：王安娜[1] 蒋延友[1] 曲延华[1] 刘歆浏[1] 

机构地区：[1]东北大学电子信息工程研究所

出　　处：《安全与电磁兼容》2009年第3期15-18,共4页Safety & EMC

摘　　要：由电磁学的基本规律麦克斯韦方程差分形式即时域有限差分(Finite Different Time Domain,FDTD)导出不均匀网格的FDTD差分形式,即不均匀网格的时域有限差分法(Non Uniform Grid Finite Different TimeDomain,NU-FDTD),并提出了在腔体孔缝电磁耦合分析中采用NU-FDTD时,网格和时间步长划分的原则是:导体边界采用局部均匀细网格法,其它空间采用渐变不均匀法。实验结果表明,这种方法不仅节省计算时间,而且精度高。The differential form of Maxwell＇s equations by the basic law of electromagnetism which is named Finite Different Time Domain （FDTD） can export the differential form of nonuniform grid FDTD （NU-FDTD）. It is pointed out that while using NUFDTD for analysis of the cavity aperture electromagnetic coupling, the principle of dividing the grid and time step is that conductor boundary uses local uniform fine-mesh method while other space uses uneven gradient method. The experiment results show that this approach is not only timesaving, but also more accurate.

关 键 词：电磁耦合 不均匀网格 时域有限差分 

分 类 号：O441.4[理学—电磁学]