| MNZ超材料的电磁特性 |
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| 引用本文： | 刘强,杨阳,周海京,徐福锴,黄卡玛.MNZ超材料的电磁特性[J].强激光与粒子束,2015,27(10):103207. |
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| 作者姓名： | 刘强 杨阳 周海京 徐福锴 黄卡玛 |
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| 作者单位： | 1.北京应用物理与计算数学研究所, 北京 1 00094; |
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| 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。
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| 关 键 词： | 电磁防护 超材料 MNZ材料 人工周期结构 |
| 收稿时间： | 2015-05-13 |
Electromagnetic characteristics of MNZ material |
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| Affiliation: | 1.Institute of Applied Physics and Computational Mathematics,Beijing 100094,China;2.College of Electronics and Information Engineering,Sichuan University,Chengdu 610065,China |
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| Abstract: | 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. |
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