混响室内电场的蒙特卡洛模拟及其实验验证

摘要

The reverberation chamber(RC) plays an important role in the electromagnetic compatibility(EMC) test,and its probabilistic-statistical model can effectively and quickly analyze the random field environment in the reverberation chamber.Based on the plane-wave integral(PWI) representation and the mode expansion method(MEM) respectively,the electric field within a reverberation chamber is constructed by means of Monte Carlo(MC) simulation.A simple RC is set up under the laboratory environment to validate the simulation results.The electric fields within the working volume of the RC are measured at different frequencies and their probability density functions(PDFs) are in good agreements with the simulated ones.So it is concluded that the PWI and MEM are completely equivalent in describing the stochastic field in the working volume of the RC.%混响室在电磁兼容测试中发挥着重要的作用,其概率统计模型可以有效、快速地对混响室内的随机场环境进行建模和分析.基于平面波积分表达式和模式叠加理论,采用蒙特卡洛方法模拟了混响室中的电场分布.在实验室环境下搭建了小型、简易的混响室,对仿真结果进行了验证.在不同频率下测得的混响室工作区域内电场幅值的概率密度函数与2种概率统计模型下的仿真结果吻合良好,证明了平面波积分模型与模式叠加模型在描述混响室工作区域内场的特性时是完全等效的.