摘要
该文基于变换光学方法,导出了正多边形电磁聚焦器的介电常数和磁导率的分布,并用有限元分析软件COMSOL进行了证实。分别仿真了TE波和线源激励下正三边形、正四边形、正五边形和正六边形电磁聚焦器附近的电场分布和能量密度分布,并讨论了正多边形电磁聚焦器聚焦区域面积大小和电磁参数偏离理论值对其聚焦特性的影响,结果表明:聚焦区域越小,电磁聚焦越强;当超材料的电磁特性偏离理论值时,电磁聚焦特性发生变化。
Based on transformation-optical approach,the distribution of permittivity and permeability for the N-sided regular polygonal electromagnetic wave concentrator is derived and functionality of the concentrator is numerically confirmed by the finite element solver COMSOL.Electric field and total energy distributions in the vicinity of the three-,four-,five-and six-sided regular polygonal concentrators are simulated.The influence of the focus area and deviation of material parameters from perfect N-sided regular polygonal concentrator on the concentrating effect is studied.The results show that the smaller the focus area,the stronger the total energy density;The deviation of material parameters from perfect concentrator results in a distortion of the electrical field and total energy density distribution.
出处
《电子与信息学报》
EI
CSCD
北大核心
2010年第10期2485-2489,共5页
Journal of Electronics & Information Technology
基金
云南省教育厅重点项目(07Z10875)
云南省自然科学基金(2007F005M)
教育部重点项目(208133)
国家自然科学基金(60861002)
国家重点基础研究发展计划(973)项目(2007CB613606)资助课题
关键词
超材料
电磁聚焦
电磁场
有限元法
Metamaterials
Electromagnetic wave concentrator
Electromagnetic field
Finite element method
