期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
Estimation Method Study of the Lowest Usable Frequency of the Reverberation Chamber
摘要/Abstract
为了满足混响室场均匀性要求，每个混响室都有一个最低可用频率.混响室最低可用频率一般与混响室的大小以及搅拌器的搅拌效率有关，混响室体积越大，最低可用频率越小.对最低可用频率的估算，目前相关标准介绍了2种方法：一种方法是在最低可用频率处，保证混响室内至少有60个模，另一种方法规定混响室最低可用频率是最低谐振模频率的3~4倍.若混响室尺寸一定，2种方法估算的结果可能不同.针对一个已知尺寸的混响室进行了仿真研究，结果表明，对于所选混响室，2种估算方法所得结果基本一致，且估算结果对应的场均匀性满足标准对容许偏差的要求.
In order to satisfy the need of field uniformity,every reverberation chamber has a lowest usable frequency.The lowest usable frequency is often relevant to the size of the reverberation chamber and stirring efficiency of the stirrers.The more the size of the reverberation chamber is,the lower the lowest usable frequency is.The estimation of the lowest usable frequency plays an important role in the devising and making reverberation chamber and finding the size of a reverberation chamber in advance.In relevant standards,there are two methods used to estimate the lowest usable frequency at present.One method is that there are 60 modes at least in the reverberation chamber at the lowest usable frequency.The other method is that the lowest usable frequency is 3 to 4 times than the lowest resonance frequency.Which method is more reasonable? To size-different reverberation chamber,the answer may be different.But if the size of the reverberation chamber is confirmed,the estimating results of the two methods may be different.Here we can choose the more effective estimating method.This paper does a deeper simulation study to a size-known reverberation chamber.The study indicates the result by the two estimating methods is uniform.
关键词
参考文献 8
- [1] 张林昌.混响室及其进展[J].安全与电磁兼容,2001(4):2-8.doi:10.3969/j.issn.1005-9776.2001.04.002
- [2] 沈涛,姚利军.混响室设计技术研究[J].宇航计测技术,2005,25(3):26-31.doi:10.3969/j.issn.1000-7202.2005.03.007
- [3] 袁智勇,何金良,曾嵘,等.电磁兼容试验中的混响室技术[J].高电压技术,2005,31(3):56-58.doi:10.13336/j.1003-6520.hve.2005.03.018
- [4] CANDACE S,GARY A T,JPHN R S.Predicting Low Frequency Behavior of Arbitrary Reverberation Chamber Configurations[C]//IEEE Symposium on EMC.Canada:IEEE Conference Publication,2001:757-761.doi:10.1109/ISEMC.2001.950469
- [5] 丁坚进,沙斐.EMC 混响室电磁场模态研究[J].电波科学学报,2005,20(5):557-560.doi:10.13443/j.cjors.2005.05.002
- [6] 王庆国,程二威,张成怀,等.电波混响室理论与应用[M].北京:国防工业出版社,2013.
- [7] IEC61000-4-21 Testing and Measurement Techniques-reverberation Chamber Test Methods[S].北京:中国标准出版社,2003.
- [8] 郭硕鸿.电动力学[M].北京:高等教育出版社,1997.