基于传输线原理的混响室散射场场线耦合模型

Model of field-to-line coupling in a reverberation chamber based on transmission line theory

基于传输线原理,构建了均匀分布在单位球表面的入射波用于模拟混响室内“全向辐照”的电磁辐照模型,并利用Agrawal散射电压公式计算双导线传输线模型的终端负载响应电流.研究了均匀分布在球面入射波的入射方向、极化方向以及入射波数量对传输线终端响应的影响,并将数值计算结果与蒙特卡罗方法的计算结果进行对比.结果表明：分布在球面上的电磁波入射角为0～π、极化角度为0～π时,即可满足响应信号的数值完整性;入射电磁波数量达到100时,能够满足混响室内“全向辐照”的要求;理论模型计算结果与蒙特卡罗方法的计算结果吻合较好,该模型可以用于混响室内散射场场线耦合规律计算.

Electromagnetic radiation model which could be used to calculate the ＂full radiation＂ in reverberation chamber was modeled in this paper using a large number of incidence waves which uniformly distributed on a unit sphere.The Agrawal scatter voltage formulation was used to calculate the payload current response.The influences of angle of incidence,polarization and the number of incidence waves on the payload current response were also investigated.The comparison was made between the simulation results with the Monte-Carlo result.The results showed that the simulation results obtained in this work agreed with the results of Monte-Carlo,and when the incidence angle was 0-π,and polarization angle was 0-π,the signal integrity could be fulfilled.When the number of incidence waves was no less than 100,the ＂full radiation＂ environment could be realized.