随机耦合模型复杂腔体电磁耦合效应统计特性

针对微波脉冲激励下复杂屏蔽腔体内部电路耦合电磁量计算的问题,建立了一个微波混沌腔体,通过测试获取了含内部电路的腔体辐射和辐射散射参数,利用随机耦合模型(RCM),对干扰脉冲能量进行了归一化处理,计算分析了微波脉冲宽度、脉冲间隔、脉冲数目以及腔体损耗因子对目标点感应电磁量统计分布的影响。计算结果表明:脉冲干扰下电路目标点耦合电磁量强于功率源激励;在脉冲能量一定的条件下,目标点耦合电磁量与微波脉冲的宽度、间隔和数目的变化均呈现一定的谐振特性,且单脉冲激励对电路的影响明显强于多脉冲。与此同时,实验还研究了电路易受电磁干扰的目标点的确定方法。

Statistical characteristics of coupling effect of complex cavity based on Random Coupling Model

The problem of calculating electromagnetic quantities of the circuit in the complex cavity is studied in this thesis. A wave chaotic cavity is built, and its radiation and scattering parameters are obtained by testing. Based on RCM, the electromagnetic quantities of the circuit sensitive points are calculated with different microwave pulse width, interval, number and the loss factor. The results of calculation indicate that the coupling electromagnetic energy will be stronger when the target point is irradiated by pulse interference compared to that irradiated by power source. When the pulse energy is fixed, the coupling electromagnetic energy will show certain resonant characteristics with the pulses width, pulse intervals and pulse number, and it will be stronger when the interference pulse number is single compared to several pulse interference. The determination method of the target point more likely affected by electromagnetic interference of circuit is studied by using experiments.