混响室条件下临界辐射干扰场强测试的影响因素分析

为了对前期提出的混响室条件下临界辐射干扰场强测试方法进行规范和完善，分析了影响测试结果准确性的因素，得到了不同条件下测试误差的变化情况.发现被测设备的电尺寸是影响该方法适用范围的主要因素，通过试验研究了电尺寸减小对测试结果的影响.结果表明，当被测设备电尺寸较大时，通过合理选择测试参数，可以将测试误差控制在3 dB以内；当被测设备电尺寸较小时，该方法的不确定度会增加，误差可能会大于3 dB.因此，该方法更加适用于电大尺寸设备的临界辐射干扰场强测试. 

Influence Factor Analysis for the Radiated Interference E-field Threshold Testing in Reverberation Chambers

In order to standardize and complete the radiated interference E-field threshold testing in reverberation chambers proposed previously, the influence factors on the measurement accuracy were analyzed in this paper, obtaining the error variation with different test conditions. It is revealed that the electrical size of the equipment under test (EUT) is the main restricted factor to the application range of the proposed method. Decreasing the electrical size of the EUT, an experiment was implemented to study the influence of the electrical size on measurement accuracy. The result shows that the measurement error can be decreased to less than 3 dB when the testing factors are reasonably chosen and the electrical size of the EUT is large enough. However, when the electrical size of the EUT is too small, the measurement uncertainty level may be larger than 3 dB. Accordingly, the proposed method is more proper for the EUTs with large electrical sizes.