混响室"全向辐照"电磁环境场线耦合规律分析
Analysis of field-to-wire coupling in full radiation environment in reverberation chamber
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摘要: 基于传输线原理，通过构建均匀分布在单位球面的入射电磁波模拟混响室内“全向辐照”电磁环境，建立了混响室散射场条件下场线耦合模型.利用此模型对双线传输线进行数值模拟，研究了传输线的长度、终端负载等关键参数对响应信号的影响.结果表明：传输线对混响室散射场条件下的“全向辐照”电磁环境有明显的选频特性，终端负载响应信号的峰值出现在以线缆长度为波长的频点的n/2倍处，其中n=1，2，3…；传输线终端负载阻值的变化不会对其响应曲线的变化规律产生影响，但会影响其响应峰值；传输线其中一个端口的负载阻值变化不会显著影响另一端负载响应信号.Abstract: Based on one unit sphere which the incidence angles equally distributed，the field-to-line couple model is derived from the transmission line theory and the“full radiation environment” is simulated.Full radiation effects under different conditions are simulated to analyze the terminal load and length response law of transmission line.The results indicate that transmission line under full radiation has a frequency selecting characteristic，and the peak of terminal load response appears at some frequency points which wavelength equal to the line length，and n/2 times to these frequency points.The change of terminal load value has no influence on the response curve.Moreover，the change of one of terminal load value has no obviously influence on another terminal load response curve.
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