２．３激励源［２～４］为了计算导波元件和电子学器件中可能存在的电磁模式，必须设置一个能激励起这些模式的激励源。由激励源产生的电磁场随时间步增加在网格空间传播，经过一段时间的传播后达到稳定。激励源在空间的分布可以是面源、线源、点源。用３Ｄ－ＦＤＴＤ分析... 2.3 Excitation Sources [2 ~ 4] In order to calculate electromagnetic patterns that may exist in guided wave and electronic devices, an excitation source that can excite these modes must be provided. The electromagnetic field generated by the excitation source propagates in the grid space with the passage of time and reaches a steady state after a period of propagation. Incentive distribution in space can be surface, line source, point source. With 3D-FDTD analysis ...