电磁脉冲斜入射时对孔缝耦合效应的数值分析

Numerical analysis on hole coupling effects of an obliqueincidence of electromagnetic pulse

利用时域有限差分法(FDTD)研究了电磁脉冲对不同孔洞的耦合规律。分别分析了电磁脉冲对正方形、长方形和多孔洞的耦合效应,讨论了不同极化方向的电磁脉冲对孔洞的耦合能量的规律。研究表明:电磁脉冲对正方形孔洞的耦合能量较小;而对长方形,当脉冲极化方向与长方形短边平行时,耦合能量最大;在孔洞面积相同的条件下,对多孔洞的能量耦合要比单孔洞小。

The finite-difference time-domain method is used to research the rule of the electromagnetic pulse coupled to the cavity with different kinds of holes on it. The coupling effects of EMP on square, rectangle hole, multi-hole and the rule of EMP having different polarized direction coupled to rectangle hole are described. Computational data indicate: (1) The energy coupled to the square hole of EMP is less; (2) When the polarized direction of the incident wave are parallel to the short side of the hole, the energy coupled will attain the maximum; (3) The hole area being the same, the energy coupled to the multi-hole less than that to the single hole.