基于天线辐射理论构建微波混沌腔的随机耦合模型

内容简介：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.

Abstract：To improve the ability of quickly and effectively resolving the coupling of electrically large complex cavities (microwave chaotic cavities), the statistical properties of the scattering from these cavities have been studied by using a statistical electromagnetics method. Firstly, based on the antenna theory, the input impedance expression of cavities is established by using the expanded electromagnetic eigenmode expression. Secondly, the random coupling model (RCM) is introduced from wave chaos theory and statistical method about microwave chaotic cavities. It is simply to use this method to directly obtain the three-dimensional model. Lastly, the three-dimensional Sinai microwave chaotic cavity is designed, and used to carry out the numerical experiment. Their statistical properties obtained are agreed well with one-another between the numerical result and RCM one. Importantly, the RCM, which is a very good method to be able to quickly predict the sensitivity of coupling about the microwave chaotic cavities, is independent of the details of the cavities.

作者：陆希成, 王建国, 刘钰, 李爽, 韩峰,

关键词：统计电磁学, 微波混沌腔, 输入阻抗, 随机耦合模型,