混响室条件下环境场强测量位置选取准则

发布时间：2018-05-23 15:22

  本文选题：混响室 + 相关系数　； 参考：《强激光与粒子束》2017年12期

【摘要】：针对在混响室条件下进行辐射敏感度测试时电磁环境场强难以度量的问题,分析了混响室内电场强度的统计特性,理论推导了有损混响室内场强空间相关系数表达式,并通过仿真分析验证了表达式的正确性。根据表达式得出有损混响室内相对距离大于半波长的两点间场强相互独立的结论,并由此推断出,混响室内环境场强测试位置与受试设备(EUT)距离应大于0.5倍波长,且应以此作为测量位置选取准则。采用仿真计算与实验验证相结合的方法分析了相对误差随测试点与EUT间相对距离的变化规律,对该准则进行了验证,结果表明,当测试点与EUT相对距离大于0.5时,相对误差能够保证在±1.5dB以内,可应用于实际混响室环境场强测试。
[Abstract]:In view of the problem that the electromagnetic environment field strength is difficult to measure in the radiation sensitivity test under the condition of reverberation chamber, the statistical characteristics of the electric field intensity in the reverberation chamber are analyzed. The expression of the correlation coefficient of the field intensity in the damaged reverberation chamber is derived. The correctness of the expression is verified by the simulation analysis. The loss reverberation is obtained according to the expression. The relative distance between the relative distance of the indoor relative distance is greater than the half wavelength, and it is concluded that the distance between the field strength test position of the reverberant indoor environment and the EUT should be more than 0.5 times the wavelength, and should be taken as the selection criterion of the measurement position. The relative distance between the pilot and the EUT is verified. The results show that the relative error can be guaranteed to be within + 1.5dB when the relative distance between the test point and the EUT is more than 0.5, and it can be applied to the actual ambient field strength test of the actual reverberation chamber.
【作者单位】： 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;白城兵器试验中心;
【基金】：国家自然科学基金项目(61372040)
【分类号】：TM937
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本文编号：1925316