基于时间门方法的随机耦合模型在复杂腔体电磁预测中的应用

利用随机耦合模型(random coupling model,RCM)预测复杂腔体电磁效应时,通常要通过测量辐射阻抗来实现,但实验过程中满足混沌腔体以及耦合通道的腔体加工、实验过程模拟等条件要求较高,且实验步骤繁琐.为了克服上述问题,文中采用时间门方法(time gating method,TGM),通过对散射参数进行...

Application of random coupling model based on time gating method in electromagnetic prediction of complex cavity

When using random coupling model(RCM)to predict the electromagnetic effect of complex cavity,it is often achieved by measuring the radiation impedance.However,in the process of experiment,it is demanding to meet the conditions of chaotic cavity,cavity processing of coupling channel,simulation of experiment process and so on,and the experimental steps are cumbersome.In order to overcome the above problems,time gating method(TGM)is used to calculate the radiation scattering parameters of the cavity by frequency domain-time domain-frequency domain conversion of scattering parameters and window selection function.The influence of gating time on the calculation results is analyzed.The applicability of this method is validated by comparing the statistical characteristics of the experimental results and the calculated results of time gating method in different frequency bands.Time gating method combined with the random coupling model can simplify the cumbersome process of the original random coupling model for the study of electromagnetic pulse coupling effects in complex metal shielding cavities.