固定散射体对提高源搅拌混响室性能的研究  

Research on Performance Improvement of Source Stirring Reverberation Chamber Introduced by Stationary Diffusers

作　　者：沈远茂[1] 陶洪波 李吉[2] 石丹[1] 高攸纲[1] 

机构地区：[1]北京邮电大学电子工程学院,北京100876 [2]国家无线电监测中心检测中心,北京100037

出　　处：《高电压技术》2014年第3期918-922,共5页High Voltage Engineering

基　　金：国家自然科学基金(60901049);中央高校基本科研业务费(BUPT2009RC0309)~~

摘　　要：为提高源搅拌混响室的性能,对固定散射体提高源搅拌混响室场均匀性的情况进行了研究。首先根据谐振和模式搅拌理论对固定散射体的作用进行了理论分析,然后通过实测结果对基于复杂结构电磁场全波计算软件(FEKO)的仿真方法有效性进行了验证,最后对3种相同尺寸、不同类型混响室(传统的机械搅拌混响室、源搅拌混响室、加入固定散射体的源搅拌混响室)的场均匀性进行了仿真。结果表明:除个别频点外,混响室在单独源搅拌方式下的场均匀性要低于机械搅拌的,而在源搅拌混响室中加入3组固定散射体(搅拌器)后,其场均匀性指标普遍改善,性能与机械搅拌基本相当。由此可见,作为提高混响室性能的一种手段,固定散射体的加入能够改善源搅拌混响室的场均匀性,而在此基础上的复合搅拌方式则有可能产生性能更好的混响室方案。In order to improve the performance of source stirring reverberation chamber （SSRC）, we studied the field uniformity of SSRC with stationary diffusers. First, we theoretically analyzed effects of stationary diffusers based on re- sonance and mode stirring theory, then, from actual measured results, we verified the validity of simulation results obtained by a simulation tool named FEldberechnung bei Korpem mit beliebiger Oberflache （FEKO） . Finally, we cal- culated out the field uniformities of three different kinds of reverberation chamber（RC）, i.e. mechanical stirring RC （MSRC）, SSRC and SSRC with stationary diffusers. Results show that performance of SSRC is worse than that of MSRC except for a few frequencies, and three sets of stationary diffusers leading to SSRC achieve better uniformity which is close to that of MSRC. It is concluded that stationary diffusers can be used as a valid tool to improve the field uniformity of SSRC, and the combination of mechanical stirring and source stirring is possible to produce a composite stirring RC with better performance.

关 键 词：混响室 散射体 源搅拌 机械搅拌 场均匀性 电磁兼容 

分 类 号：TM937[电气工程—电力电子与电力传动]