基于最小二乘支持向量机的BLT方程孔缝散射模型

An Aperture Scattering Model for BLT Equation Based on Least Square Support Vector Machine

孔缝电磁散射效应分析是开展复杂电子系统电磁防护研究的重要组成部分.基于微波二端口网络分析理论和电磁拓扑理论,构建了孔缝散射数学模型和广义散射矩阵,并提出了一种新的孔缝散射矩阵进化求解算法.对单矩形孔腔体HFSS数据进行了仿真分析,结果表明:散射矩阵对反射效应和透射效应的预测绝对误差均值为±1.2mVm和±3.3mV/m,相对误差均值为±0.17%和±8.29%;当预测精度为90%时,对反射效应和透射效应的最大预测绝对误差为±2.9mV/m和±0.763 5mV/m,最大预测相对误差为±0.39%和±0.93%,实现了孔缝散射效应的准确预测,验证了模型可靠性和实用性.

The analysis on aperture scattering is an important composition of electromagnetic protection research on complex electronic system.A mathematic model of aperture scattering was built on the base of two-port network theory and electromagnetic topology theory,with which a generalized scatter matrix was designed.A data sieving strategy was formulized for least square support vector machine,based on which a new algorithm for aperture scattering matrix with evolving ability was proposed.By use of the simulation data of an rectangle aperture cavity＇s HFSS model,the aperture scattering model was tested.The mean absolute error of the forecasting about reflection and transmission are±1.2mV/m and±3.3mV/m,while the mean relative error are ±0.17% and ±8.29%.At the precision of 90%,the absolute error of forecasting about reflection and transmission are less than and,while the relative error are less than ±0.39% and ±0.93%,which means the aperture scattering is predicted accurately.The practicability and reliability of the method are proved.