摘要
以无限长超材料圆柱壳为理论模型,研究隐身超材料这种新型人工复合材料。基于Pendry坐标变换法,在压缩柱坐标系中,分析理想超材料电磁参数分布特性。为满足透波隐身,圆柱壳材料相对电容率和磁导率均是二阶旋转对称张量,在内界面处各向异性程度最高,参数径向分量趋于无限大,强烈抑制该方向电磁波的传播。运用全波仿真方法,从场总能量密度分布角度,比较研究了理想超材料与分层超材料、有耗超材料圆柱壳的电磁隐身效果,结果表明超材料具有良好的透波隐身性能。最后,针对隐身结构实际使用环境,对各向同性介质空间隐身圆柱壳的参数设置作了说明。
Metamaterial for invisibility is a new class of artificial functional material. This paper takes infinite concentric cylindrical shell as stealth model. First, the distribution and high bianisotropic properties of metamaterial for invisibility are analyzed in squeezed cylindrical coordinate system. Second, the invisibility performances of cylindrical shell of the ideal,layered and lose materials are simulated according to full -wave simulation method, the distri- bution of relative total energy density demonstrates that the metamaterial cylindrical shells are perfect in invisibility performance. Finally, usage in other isotropic electromagnetic environment is introduced according to Pendry coordinate transformation method.
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2008年第3期67-70,共4页
Journal of Air Force Engineering University(Natural Science Edition)
基金
国家自然科学基金资助项目(10474077)
空军工程大学理学院首批科技资助项目
关键词
隐身超材料
各向异性程度
隐身效果
全波仿真
metamaterial for invisibility
invisibility performance, anisotropie degree, full -wave simulation
