In the past, however, disregarding the above fact, a point source that creates a cylindrical wave was used to numerically validate the numerical dispersion relations of the FDTD-related methods.

• 过去,然而,忽视上述的事实,一个产生一个圆筒形的波点来源用来数字地使 FDTD- 相关的方法数字散布关系有效。