电波暗室用铁氧体瓦的设计
Design and Performance Analysis of Ferrite Tile for EMC Anechoic Chamber
摘要 铁氧体吸波体是保证EMC屏蔽暗室符合FCC及IEC标准低频性能要求的关键元件,文章通过理论分析,给出了铁氧体吸波体的吸波性能与其磁损耗角正切之间的数学表达式,并对用于吸波体的典型铁氧体材料进行了性能分析,在此基础上,提出了铁氧体吸波体的设计准则。
关键词 EMC电波暗室 铁氧体吸波体 铁氧体
Abstract Ferrite tile is the key component for an EMC anechoic chamber to meet FCC
and IEC requirements on the low end of the frequency range. A very simple relationship
between the normal incident reflectivity performance of the ferrite and the loss tangent
of the intrinsic permeability is given, and the performance of a ferrite tile model is
analyzed. Based on the analysis, we got some guide line for the ferrite tile absorber
design.
Keywords EMC anechoic chamber, ferrite tile absorber, ferrite