混响室与均匀场临界辐射干扰场强等效测试方法

为解决混响室条件下设备的临界辐射干扰场强测试结果与均匀场相关性较差的问题，提出了一种基于不同测试场地EUT的接收功率相等的临界辐射干扰场强测试方法.首先通过理论推导，得到混响室条件下被测设备临界辐射干扰场强计算公式；然后采用电磁场仿真软件FEKO，建立混响室和均匀场的仿真模型，在理想情况下验证了理论的正确性；最后以ETS 3142E型天线为被测设备，分别在混响室和开阔场中对该方法进行了试验研究.结果表明:该方法得到的临界辐射干扰场强与均匀场有较好的一致性；由于考虑了混响室的全向辐照电磁环境，测试结果具有较小的相对误差. 

An Equivalent Test Method for the Critical Radiated Interference E-field Strength in Uniform fields and Reverberation Chambers

In order to solve the problem of the poor correlation of the critical radiated interference E-field strength (CRIS) test results between reverberation chambers and uniform fields, a new CRIS test method was proposed for reverberation chambers, based on the equivalence of EUT received power under different test environment. The calculation formula of the CRIS in reverberation chambers was derived, and then verified under ideal conditions by building the model of a reverberation chamber and a uniform field with the electromagnetic simulation software FEKO. An experiment was designed in reverberation chamber and the open area with the ETS 3142E antenna as equipment under test. The results show that the CRIS obtained with the new method can be well consistent with the uniform field. With the omnidirectional radiation electromagnetic environment consideration, the relative errors are greatly reduced.