To have radio fuze making better resistance to HPM jamming,the slot coupling characteristics of HPM pulse into cavity are studied by using the software XFDTD6.

• 以提高无线电引信抗高功率微波干扰的能力为应用背景；采用基于时域有限差分方法(FDTD)的电磁场仿真软件XFDTD6.；数值模拟高功率微波(HPM)的孔缝耦合特性。；