复合介质等效电磁参数的数值研究  

Numerical simulation of equivalent electromagnetic parameters of composite material

作　　者：丁世敬[1,2] 葛德彪[1] 申宁[3] 

机构地区：[1]西安电子科技大学理学院,西安710071 [2]总参谋部工程兵科研三所,洛阳471023 [3]西安邮电学院电子与信息工程系,西安710006

出　　处：《物理学报》2010年第2期943-948,共6页Acta Physica Sinica

摘　　要：利用时域有限差分(FDTD)方法研究了掺杂介质材料等效电磁参数的反演方法.首先用FDTD方法计算掺杂介质的反射、透射系数,然后结合遗传算法和传播矩阵法反演不同掺杂比率的等效电磁参数,得到了等效电磁参数随掺杂比率变化的关系曲线.在复合材料的掺杂比率较低和较高时,等效电磁参数计算公式之间以及数值方法得到的结果比较一致;当掺杂比率处于中间值时,则稍有差别.结果显示用数值方法反演复合材料等效电磁参数具有可行性.The numerical reconstruction scheme of equivalent electromagnetic parameters for composite material is proposed based on the finite difference time domain（FDTD） method. To study the relationship between equivalent electromagnetic parameters and the bulk density of mixed medium, the reflection coefficient and transmission coefficient were firstly calculated by the FDTD method, and then the equivalent electromagnetic parameters were reconstructed by genetic algorithm and propagation matrix method under different blending ratios. When the blending ratio of composite material is low or high,the equivalent electromagnetic parameters calculated by the equivalent constitutive parameter formulas and numerical reconstruction scheme agree well with each other. The results are somewhat different only for the middle blending ratio. The results show the feasibility of the proposed numerical scheme for the reconstruction of equivalent electromagnetic parameters of composite material.

关 键 词：等效电磁参数 反演 遗传算法 时域有限差分法 

分 类 号：O441.6[理学—电磁学]