用MEI方法研究脉冲线源辐射问题
Study on EM pulse radiation problems with time domain MEI method
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摘要: 脉冲线电流源的辐射问题是研究高功率微波辐射、传播和散射问题的基础。用时域有限差分方法结合时域MEI吸收边界条件来对该问题进行求解,通过与不同种类边界条件配合得出的数值解的比较可以证明,利用时域MEI方法的一阶吸收边界条件对线源辐射问题进行处理时,可以使截断边界离源更近,从而减少了计算量,并达到提高计算精度的目的。Abstract: The electromagnetic pulse radiation problem is the starting point for high power microwaves radiation, propagation and scattering. This paper applies the finite difference time domain technique(FDTD) combined with the timedomain measured equation of invariance method(MEI) to calculate line source radiation problem with near truncating boundary. The numerical results show that MEI boundary condition has high effect and high accuracy than two-order Mur boundary condition.
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Key words:
- electromagnetic radiation and scattering /
- fdtd method /
- mei method
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