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为了能够快速有效地求解电大复杂腔体(微波混沌腔)的电磁耦合问题,文中采用统计电磁学方法研究了该类腔体电磁散射的统计特征.首先,根据天线辐射理论,利用电磁场的本征模展开式建立了腔体耦合输入阻抗表达式.其次,利用波动混沌理论和概率统计方法进一步推导出了微波混沌腔的随机耦合模型.该方法简单并且可以直接推导出三维模型.最后,构建了一个三维Sinai微波混沌腔并进行数值仿真实验,其仿真实验结果与随机耦合模型计算结果的统计特征基本一致.重要的是,该模型与复杂腔体的细节特征无关,能够快速有效地预测微波混沌腔的敏感耦合问题.
In order to solve the problem of electromagnetic coupling of TVC complex cavity (microwave chaotic cavity) quickly and effectively, the statistical characteristics of electromagnetic scattering of such cavity are studied by using statistical electromagnetism method.Firstly, according to the theory of antenna radiation, Mode expansion is used to establish the expression of cavity coupling input impedance.Secondly, the stochastic coupling model of microwave chaotic cavity is further deduced by using chaos theory and probability statistics method.The method is simple and can derive three-dimensional model directly.Finally, A three-dimensional Sinai microwave chaotic cavity is simulated and the numerical simulation is carried out. The simulation results are basically the same as those of the stochastic coupling model. Importantly, this model has nothing to do with the details of complex cavities and can predict microwave chaos quickly and effectively Cavity sensitive coupling problems.