The feasibility of mode stirred reverberation chambers(MSRCs)constructed by using flexible shielding materials is investigated,whose uneven walls enable them easily meet the requirements of the statistic characteristics of isotropic,uniform distribution and random polarization.The field uniformity and the probability density function(PDF)of normalized electric field are measured,and the results are in accordance with the standard IEC 61000-4-21-2011 and the PDF of ideal MSRC model.Then the influence of the stirrer rotation speed,antenna height and position on PDF of normalized electric field is analyzed experimental-ly.Finally,the flexible shielding material based reverberation chamber is used to measure the shielding effectiveness(SE)of an electrically large cavity with and without water load,demonstrating a good feasibility.%利用柔性屏蔽材料不平整性使屏蔽腔内场环境易于满足各向同性、均匀分布、随机极化统计特征的特点,研究了三种不同柔性屏蔽材料搭建的模式搅拌混响室的可行性.在Z字形搅拌器的作用下通过测量得到低频场均匀性和高频归一化电场的概率密度函数,根据IEC 61000-4-21-2011标准和理想混响室模型验证了所搭建混响室的有效性.在此基础之上,通过实验测量分析了搅拌器转速、天线高度、天线位置对归一化电场概率密度函数(PDF)的影响,并利用所搭建混响室对加载开孔电大金属腔的电磁屏蔽效能进行了测试.研究结果表明利用柔性屏蔽材料搭建混响室具有较好的可行性.
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