摘要
简述了孔缝耦合的原理及屏蔽效能的计算。应用传输线矩阵法对航空电子模块的屏蔽壳体模型中可能影响孔缝耦合的相关因素进行了分析,该数值计算法可用于低频段屏蔽效能的分析。利用CST仿真分析了带孔缝屏蔽壳体内部加载的PCB板对其屏蔽效能变化和谐振点的影响。结果表明,加载状态下航电模块中屏蔽壳体的谐振效应得到有效抑制。
The principle of aperture coupling and the calculation of shielding effectiveness are described.The transmission line matrix method is applied to analyze the related factors that may affect the coupling of apertures and slots in the shielding shell model of avionics module.The results show that the numerical calculation method can be used to predict the shielding effectiveness in low frequency band.In addition,CST simulation is used to analyze the effect of PCB loaded inside the aperture shield shell on the shielding effectiveness and resonance point.The results show that the resonance effect of the shielding shell in the avionics module is effectively suppressed.
基金
工信部资助项目:MJ-2017-F-11。
关键词
孔缝耦合
屏蔽效能
传输线矩阵法
仿真
aperture coupling
shielding effectiveness
transmission line matrix
simulation
