摘要
频率搅拌混响室具有节省建造成本、提供更大的测试空间、减少测试时间等优点,尤其适用于小混响室,应用前景广阔。计算了给定工作频率下混响室的谐振模式,对频率搅拌的有效性进行理论分析。分别采用FEKO建模仿真和试验两种方式,测量工作区域8个顶点位置的场强值,运用IEC61000-4-21中关于场均匀性的评价标准对测量结果进行检验。结果表明场均匀性均符合标准要求,从而验证了频率搅拌混响室的有效性。在此基础上通过设置对比仿真,比较了中心工作频率在200 MHz,搅拌带宽分别为6 MHz、10 MHz、20 MHz时场均匀性的情况。结果表明随着带宽增大,场均匀性可以得到一定程度改善,但并不明显。
Frequency stirred reverberation chamber has many advantages,like save construction costs,provide more test space and reduce test time,especially,it has broad application prospect for small reverberation chamber.The Reverberation chamber resonant mode under the given operating frequency is calculated,and had theoretical analysis of the effectiveness of frequency stirring.FEKO modeling simulation and experiment,and measured field strength values of 8 vertex position in the work area are adopted,then tested the measurement results by using IEC61000-4-21 about field uniformity evaluation standard.The results show that field uniformity are in line with the requirements of the standard,which proves the effectiveness of frequency stirred reverberation chamber.On this basis,by setting the contrast,we compared the center operating frequency 200 MHz,stirred bandwidth respectively for 6 MHz,10 MHz,20 MHz field uniformity.The results show that as bandwidth increases,the field uniformity can be improved but not very significant.
出处
《科学技术与工程》
北大核心
2013年第34期10162-10166,共5页
Science Technology and Engineering
基金
国家自然科学基金青年科学基金(51107147)资助
关键词
频率搅拌
扫频方式
场均匀性
有效性
frequency stirring
sweep mode
field uniformity
validity