Application Of Improved Method Of Random Coupling Model In Prediction Of Electromagnetic Effect

As the electromagnetic environment becomes more and more complex,the coupling of external electromagnetic interference signals into electronic equipment to cause harm has become a very common problem.Due to the complexity of electronic systems,the uncertainty,randomness,and sensitivity of various electromagnetic interferences coupled into the system are becoming more obvious,and statistical analysis in electromagnetic effects research is obviously better than deterministic description.Random Coupling model(RCM),as a statistical method,is of great significance in the fields of electromagnetic compatibility,statistical electromagnetics,radiation hardening,and high power microwave effects.In order to make it a universal research tool,More in-depth theoretical analysis and experimental research are needed.Aiming at the short-track problem in the prediction of coupled electromagnetic quantities in a complex cavity in the classic RCM,this paper introduces and uses a short-track random coupling model to systematically analyze the electromagnetic pulse coupling effect of a wave chaotic cavity.From theory and experiments This model is studied in two aspects.Firstly,based on the research status of random coupling models.the characteristics and limitations of the existing research methods are analyzed.The random coupling model is introduced from the uncertainty of the complex cavity and the randomness of the effect process.The method for determining the volume loss factor and the random matrix Monte Carlo method are used to describe and analyze the process of generating a normalized impedance matrix.Based on this,the construction process of the short-orbit random coupling model(SORCM)is discussed,including basic theory and formula derivation.Secondly,a short-track iterative model is established,the calculation method of each parameter is given,and the fit of the model under different parameter settings is verified.In different frequency bands,the statistical characteristics of the calculation results of SORCM and classic RCM are compared with the measured results,which verifies the correctness of the model.Finally,the basic principle of Time Gating Method(TGM)and its theoretical derivation process are introduced in detail.TGM was used to transform the scattering parameters in the frequency domain-time domain-frequency domain,combined with the gating function,the cavity radiation scattering parameters were calculated,and the influence of the gating time on the calculation results was analyzed.In different frequency bands,the statistical characteristics of the calculated results and experimental results of TGM are compared and analyzed,and the applicability of the method is verified.Open up new methods and ideas for the random coupl ing model in the field of electromagnetic compatibility research.