摘要
为简化计算,在分析蜂窝周期结构电磁场问题时用到一个叫做"均质化"的方法,通过均质化理论推导出蜂窝吸波材料等效电磁参数的近似计算公式。这些表达式可用来计算具有几何周期结构的蜂窝材料的等效介电常数、磁导率以及反射系数。计算结果表明,蜂窝结构的等效介电常数和等效磁导率均小于基体材料的介电常数和磁导率。对于轴向厚度(区别于蜂窝壁厚度)不同的蜂窝材料,存在一个最优的基体材料占空比值,使得吸收层整体的反射率最小,这些结果对于蜂窝结构的设计具有一定意义。
In order to simplify the calculation, a method called ＂homogenization＂ is used in the analysis of the electromagnetic field problems of honeycomb structures. Closed-form computing formulas for the equivalent electromagnetic parameters of honeycomb absorbing materials are obtained by theoretical derivation of homogenization. These expressions can be used to efficiently calculate the equivalent permittivity, permeability and reflection coefficient of honeycomb materials with periodic structures. It is pointed out that the equivalent permittivity and permeability of honeycomb-structure are smaller than those of the matrix material. The absorbing layer should have an optimum duty cycle value of the matrix material to make the reflectivity minimal for honeycomb materials with different axial thickness. These results are of some significance for design of honeycomb structures.
出处
《磁性材料及器件》
北大核心
2013年第1期16-19,共4页
Journal of Magnetic Materials and Devices
关键词
吸波材料
蜂窝结构
均质化
等效介电常数
等效磁导率
反射率
absorbing material
honeycomb-structure
homogenization
equivalent permittivity
equivalent permeability
reflection coefficient
