高功率微波孔缝耦合特性的数值模拟及防护加固技术

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XFDTD6．0，数值模拟高功率微波（HPM）的孔缝耦合特性。论文仿真和分析了矩形孔隙的微波耦合特性，讨论了入射波极化方向和孔径尺寸对耦合特性的影响，对比分析了矩形、正方形和圆形孔隙在相同入射条件下的耦合特性，数值模拟与前人的实验结果相吻合。结论表明：HPM孔缝耦合存在共振效应、增强效应与极化特性；在孔洞面积相同的条件下，正方形或圆形孔隙的耦合能量小于矩形孔隙。依据上述结论，提出了无线电引信对抗高功率微波的防护加固措施。

Numerical Studies on the Coupling Characteristics of HPM Pulse into Cavity with Slot and Protective Measures Against HPM

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 XFDTD6.0 based on the method of FDTD. In this paper, the coupling properties of rectangular slot are simulated, the influence of the polarized direction of HPM pulse source and the slot size on the coupling characteristics is analyzed, and the coupling characteristics of square, circular and rectangular slot are compared. The numerical simulation is matched with the experimental results obtained from the published paper. The results show that the resonant effect, enhancement effect and the polarized property of electric field will appear during the HPM pulse into cavity, and that the coupling energy of square or circular slot is less than that of rectangular slot. Finally, the protective measures against the HPM jamming for radio fuze are presented.