Theory and application of frequency stirring reverberation chamber
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摘要: 从理论上分析了混响室采用频率搅拌的可行性，仿真计算和试验测量了频率搅拌混响室内部电场的均匀性和统计特性，探索了在屏蔽效能测试中的应用。研究结果表明：频率搅拌方法能够得到空间统计均匀的电场分布，电场直角分量的模值服从瑞利分布，并且频率越高电场的均匀性和统计特性越好。在频率搅拌混响室内部测试得到开缝小尺寸屏蔽体在1~10 GHz频段的屏蔽效能约为15 dB，与机械搅拌混响室测试结果基本一致。关键词： Abstract: Key words:Abstract: The feasibility of the reverberation chamber using frequency stirring was analysed in theory. The field uniformity and statistical characteristics within the reverberation chamber were simulated and tested. And the application to measuring shielding effectiveness was investigated. The results show that the field uniformity could be got by frequency stirring, the electric field right angle components obeyed Rayleigh distribution, and the field uniformity and statistical characteristics became better with the frequency rising. The shielding effectiveness of small enclousres with an aperture was tested in a frequency stirring reverberation chamber, and the SE was about 15 dB, which was fit with the test results of the mechanical stirring reverberation chamber.
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