网格长度对FDTD计算的影响-电子资讯-维库电子市场网 关键词： FDTD方法，网格长度，数值色散，远场散射 [gap=796]Key words: FDTD method，Gridding length，Numerical dispersion，Farfield scattering
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... numerical diffusion 数值扩散 numerical dispersion 数值弥散 numerical dual coding 数字的双重编码 ...
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numerical dispersion model 数值散布仿真系统
coefficient of numerical dispersion 数值色散系数
numerical dispersion error 数值色散误差
numerical dispersion relation 数值频散关系
Stability and Numerical Dispersion 稳定性及数值色散性
Compared with FDTD, MRTD has less phase error and so its numerical dispersion is less with the same cells size.
与FDTD方法相比,MRTD方法有较小的相位误差,因此在相同的网格尺寸的条件下,MRTD方法的数值色散小,计算精度高。
参考来源 - 小波与时域多分辨分析（MRTD）在电磁散射中的应用It has to satisfy two physical intrinsic and limitations: numerical dispersion and stability. In order to reduce the numerical dispersion, it need more fine net grids, usually, smaller than 1/10 wavelengh.
需满足两个固有的物理限制：数值稳定性和数值色散性。
参考来源 - 电磁场计算中的紧支撑小波时域多分辨分析方法·2,447,543篇论文数据，部分数据来源于NoteExpress
It has to satisfy two physical intrinsic and limitations: numerical dispersion and stability.
需满足两个固有的物理限制：数值稳定性和数值色散性。
It is showed that the method can dispel most numerical dispersion and the vibration of solution doesn't increase.
结果表明该法能消除大部分的数值弥散，而且又不增加解的振荡性。
In the same conditions, the numerical dispersion will worsen when the grid becomes bigger or difference accuracy becomes lower.
在相同的条件下，剖分步长越大及差分精度越低，数值频散现象越明显。
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