电波混响室的仿真及场均匀性分析

Simulation and Analysis on Field Uniformity of Reverberation Chamber

混响室常用于电磁兼容性能测试。在以往的混响室建造中,常依赖设计者个人经验,通过反复调试来保证混响室的场均匀性。为此,提出了一种混响室的电磁仿真校验方法,并对不同搅拌方式下的场强分布及场均匀性进行了仿真分析。仿真结果表明,所设计的混响室最低使用频率100 MHz的场均匀性为3.73 dB,并验证了400 MHz的场均匀性为2.64 dB,均满足标准要求且有一定的设计余量。文章对工程实践中混响室的设计建造具有指导意义。

The reverberation chamber(RC)is commonly used for electromagnetic compatibility performance testing.In the previous construction of RC,it is relied on the personal experience of the designer to ensure the field uniformity through repeated debugging.Therefore,an electromagnetic calibration method by simulating is proposed.The field intensity distribution and field uniformity under different stirring methods are simulated and analyzed.The simulation results show that the field uniformity of the designed RC with a lowest frequency 100 MHz is 3.73 dB and the field uniformity of 400 MHz is verified to be 2.64 dB,both of which meet the standard requirements and has a certain design margin.This paper has guiding significance for the design and construction of RC in engineering practice.