边界形变互耦混响室屏蔽效能测试技术研究  

Research on Shielding Effectiveness Test Technology of Boundary Deformation Mutual Coupling Reverberation Chamber

作　　者：程二威 王平平 张怡 贾锐 孟萃[1] CHENG Erwei;WANG Pingping;ZHANG Yi;JIA Rui;MENG Cui(Department of Engineering Physics,Tsinghua University,Beijing 100084,China;National Key Laboratory on Electromagnetic Environment Effects,Army Engineering University Shijiazhuang Campus,Shijiazhuang 050003,China;63892 unit of PLA,Luoyang 471000,China)

机构地区：[1]清华大学工程物理系,北京100084 [2]陆军工程大学石家庄校区电磁环境效应国家级重点实验室,石家庄050003 [3]中国人民解放军63892部队,洛阳471000

出　　处：《高电压技术》2023年第7期3102-3109,共8页High Voltage Engineering

基　　金：国家自然科学基金(51677191,61801480)。

摘　　要：为了解决混响室环境下屏蔽效能测试存在的系统结构复杂和测试结果误差大等问题,使用边界形变代替机械搅拌、互耦混响室代替嵌套混响室、柔性屏蔽布代替金属壳体等方法,提出了一种基于边界形变技术的互耦混响室屏蔽效能测试方法,简化了测试装置,增加了使用频率带宽。通过对混响室内部功率密度归一化处理,提出了混响室条件下屏蔽效能定义新方法,修正了测试装置、受试材料加载等对混响室内电场分布的影响,提高了测试的准确性。试验研究了研制的边界形变互耦混响室屏蔽效能测试系统的有效性,并探索了接收天线位置及指向对复合材料屏蔽效能测试结果的影响规律。研究发现研制的屏蔽效能测试系统动态范围为60~90 dB,内部电场标准偏差均小于3 dB,可以用于屏蔽效能测试;受试复合材料在1~10 GHz频率范围内屏蔽效能均值在28~34 dB之间波动,5组测试数据的最大标准偏差为1.96 dB,变异系数小于8.05%,测试结果重复性好。In order to solve the problems that the structure of the shielding effectiveness(SE)measurement system of the reverberation chamber(RC)is too complex and inaccurate,a method for measuring the SE of the mutual-coupling RC material based on the boundary deformation technique was put forward.By normalizing the internal power density of the transmitting RC,a modification method for the definition of SE of materials in the RC was proposed.This definition method can be employed to eliminate the influence of the test device and the test material loading on the electric field distribution,so the test accuracy is improved.The performance of the SE test system was studied experimentally,and the influence of the position and direction of the receiving antenna on the SE test results was discussed.The results show that the dynamic range of the developed SE testing system is 60~90 dB,and the standard deviation of the internal electric field is less than 3 dB,which can be used for SE testing.The average SE of the tested composites fluctuates between 28 dB and 34 dB in the frequency range of 1~10 GHz.The maximum standard deviation of the five groups of test data is 1.96 dB,and the coefficient of variation is less than 8.05%,which showed that the test results had good repeatabilty.

关 键 词：混响室 边界形变 屏蔽效能定义 重复性 动态范围 复合材料 加载效应 

分 类 号：TN03[电子电信—物理电子学]