物理学报2012，Vol.61Issue(5)：120-125,6.
基于蘑菇型结构的双入射超宽带复合媒质材料设计与分析
Design and analysis of double incidence metamaterials composed of mushroom-shaped structure
摘要
Abstract
An ultra-wide band metamaterial may be achieved via the design of some structures. A metamaterial unit supporting two- dimensional （2D） incident electromagnetic （EM） wave is proposed based on the mushroom type-structures, which has an ultra-wide band with seamlessly combined band of right-handed and left-handed pass-bands. This unit is designed by setting two reverse symmet- rical mushroom-shaped strips on each side of the dielectric substrate respectively, and the electric resonance and the magnetic resonance could be excited simultaneously. With CST software, the right-handed and left-handed properties are analyzed and verified by means of spectrum analysis, effective parameters of permittivity, permeability and index of refraction extracted from S parameters, and equivalent magnetic resonance circuits. The results show that the structure can present left-handed properties with 1 GHz left-handed pass-band in X waveband, either EM wave is incident in the direction perpendicular or parallel to the plane of the substrate. When the EM wave is incident in the direction perpendicular to the substrate, the right-handed and the left-handed pass-bands appear at 7.2 GHz--9.3 GHz and 9.3 GHz--11 GHz respectively; while when the EM wave is incident in the direction parallel to the substrate, the right-handed and the left-handed pass-bands appear at 7.0 GH--9.0 GHz and 9.0 GHz--10 GHz respectively. It also shows that the zero indexes of refraction occur at 9.3 GHz and 9.0 GHz in the tow instances above. So that a plus-zero-negative metamaterial is constructed and a 2D incident balanced-structure with an ultra-wide band of 3 GHz is achieved.关键词
蘑菇型结构/左手材料/双入射/平衡结构Key words
mushroom-shaped structure/left-handed material/two-dimensional incidence/balanced-structure分类
信息技术与安全科学引用本文复制引用
张洪欣,李栅,张金玲,刘雯,吕英华..基于蘑菇型结构的双入射超宽带复合媒质材料设计与分析[J].物理学报,2012,61(5):120-125,6.基金项目
国家自然科学基金（批准号：60871081,61072136）、北京市自然科学基金（批准号：4112039）和北京邮电大学大学生创新计划基金（2010）资助的课题. （）
