腔体电磁环境特性研究

研究了腔体电磁效应与腔体几何参数的关联性,腔体几何结构对腔体电磁效应的影响主要表现在3个参数上：发射天线与第1个散射体的间距,第1个散射体的长度和腔体的间距。这3个参数关系到广义腔体处于短波天线何种场区。采用数值仿真分析方法,获取了腔体位于短波天线不同场区的电磁特性。仿真结果表明,无论腔体位于天线何种场区,腔体电磁效应都存在。基于构建的腔体几何结构参数与腔体电磁效应之间的关联性模型,可以对强辐射源周围由敏感设备构成的腔体结构附近电磁环境强度进行判别,有利于更好地开展复杂平台电磁安全性设计。

Research on Electromagnetic Environmental Characteristics of Cavity

Relationship between cavity electromagnetic effect and dimensions of cavity was studied.There are three parameters which can indicate the influence on cavity electromagnetic effect.The first one is the distance between antenna and the first scatterer.The second one is the length of the first scatterer.The third one is the distance between cavities.They had a close bearing on the position of cavity.The electromagnetic characteristics of cavity located at different regions were analyzed based on numerical simulation method.The results indicated that cavity electromagnetic effect exists all the time.According to the relationship between dimensions of cavity and cavity electromagnetic effect,the electromagnetic field around sensitive equipments can be estimated qualitatively.It＇s useful for the electromagnetic safety design of platform.