摘要
主要围绕磁导率接近0的MNZ超材料,通过理论分析和数值模拟方法对MNZ材料的电磁特性进行了研究。针对线源置于二维MNZ材料内部的情况,通过理论详细分析了在MNZ材料和空气交界处的阻抗匹配特性和传播常数的连续性,基于有限元数值方法模拟验证了电磁场在MNZ材料边界处的等幅同相特性,从而实现了均匀平面波的传播特性。同时,考虑到将线源置于空气中有助于辐射出电磁能量,通过数值模拟分析了电磁波由空气入射到MNZ材料的电磁特性,发现在特定极化条件下,只能当电磁波波前与MNZ材料边界平行时,才能较好地实现阻抗匹配,从而基于MNZ材料实现新颖的辐射特性。
The metamaterial exhibits more and more novel electromagnetic characteristics,such as the electromagnetic cloak,the frequency selective surface,the energy selective surface,and the like.The metamaterial is widely applied to antenna design,electromagnetic protection and other engineering zones.In this paper,the research on the electromagnetic characteristics of mue near zero(MNZ)material is completed by theoretical analysis and numerical simulation method.Considering a two-dimension MNZ structure,the impedance match between MNZ material and air and the continuity of propagation constant is theoretically analyzed,and it is verified with numerical simulation.It turns out that such characteristic can result in forming plane wave.Also,it is found that a good impedance match can be achieved if the electromagnetic wave parallels to the boundary of MNZ material.In that way,the electromagnetic waves can pass through the MNZ material,and some novel radiation characteristics can be obtained.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2015年第10期31-34,共4页
High Power Laser and Particle Beams
基金
中国工程物理研究院复杂电磁环境重点实验室基金项目(2015E0-01-1)
关键词
电磁防护
超材料
MNZ材料
人工周期结构
electromagnetic protection
metamaterial
MNZ material
artificial periodic structure
