摘要
利用坐标变换理论,推导出椭圆形和梯形变换空间的电磁参数分布,设计出组合型目标的电磁超材料隐身斗篷。在频率为400MHz的平面横电波(TE波)垂直入射的条件下,对该斗篷的隐身性能进行数值仿真分析。结果表明,在隐身斗篷的作用下,目标模型内部几乎没有电磁波进入,斗篷以外的电磁场也没有明显的变化,这些现象与理论预测的结果基本一致,体现了所设计的斗篷良好的隐身性能,由此验证了根据坐标变换设计的超材料,在理论上具有控制电磁波传播路径并且不改变外界波场的特性。
Based on the method of coordinate transformation,the distributions of the electromagnetic parameters in the elliptical and trapezoidal transformed spaces were derived.Aimed at combined target,the electromagnetic stealthy cloak made of metamaterials was designed.On the condition that TE wave of 400MHz entered normally into the domain,the stealthy characteristic of stealthy cloak was emulated.The result of emulation showed that few waves penetrate into the interior of the target model because of the stealthy cloak.Besides,the electromagnetic field outside the cloak had no obvious change.So the excellent stealthy characteristic of the cloak was verified.The entire phenomenons were in accordance with the predicted results in theory.Therefore,metamaterials designed by coordinate transformation,have the capacity of controlling the path of electromagnetic wave＇s transmission and making little influence to the external electromagnetic field theoretically.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第15期2235-2238,共4页
Journal of Functional Materials
基金
国家高技术研究发展计划(863计划)资助项目(2011AAXXXX061)
关键词
超材料
坐标变换
隐身
斗篷
电磁波
metamaterial
coordinate transformation
stealth
cloak
electromagnetic wave
