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为研究平面波辐照下含短贯通导体金属腔体电磁耦合规律,利用电磁仿真软件CST搭建仿真耦合模型,从频域角度进行了仿真研究,并利用矢量网络分析仪、功率放大器、GTEM室和电场测试探头搭建实验系统进行了验证。通过仿真研究了贯通导体长度、贯通孔尺寸和腔体内屏蔽效能监测点位置等因素对屏蔽效能的影响。结果表明:仿真和实验的结果具有一致性;贯通导体腔体外长度越长,屏蔽效能越低,腔体内长度越长,腔体谐振频点越低;贯通孔尺寸越大,腔体屏蔽效能越低;监测点位置离贯通导体越近,屏蔽效能越低。同时研究了吸波材料和开口金属环对含短贯通导体金属腔体的防护效果。此研究具有实用意义,能够指导电子设备的设计和安装。
In order to study the electromagnetic coupling law of metal cavity with short penetrating conductor under plane wave irradiation, the simulation coupling model was established by electromagnetic simulation software CST, and the simulation was carried out from the perspective of frequency domain. The vector network analyzer, power amplifier, GTEM chamber and electric field Test probe set up experimental system was verified. Through the simulation study of the length of the through-conductor, through-hole size and cavity shielding effectiveness of the monitoring point position and other factors on the shielding effectiveness. The results show that the simulation and experimental results are consistent. The longer the length outside the through-conductor cavity, the lower the shielding effectiveness. The longer the cavity length, the lower the resonance frequency of the cavity. The larger the through-hole size is, Low; the closer the monitoring point is from the through conductor, the lower the shielding effectiveness. At the same time, the protective effect of the absorbing material and the open metal ring on the metal cavity with short through conductors is studied. This research has practical significance, can guide the design and installation of electronic equipment.