Significant enhancement of magnetic shielding effect by using the composite metamaterial composed of mu-near-zero media and ferrite

被引:4
|
作者
Chen, Xu [1 ]
Wang, Yuqian [1 ]
Guo, Zhiwei [1 ]
Wu, Xian [1 ]
Yang, Fengqing [1 ]
Sun, Yong [1 ]
Li, Yunhui [1 ]
Jiang, Haitao [1 ]
Chen, Hong [1 ]
机构
[1] Tongji Univ, Sch Phys Sci & Engn, MOE Key Lab Adv Microstruct Mat, Shanghai 200092, Peoples R China
来源
EPJ APPLIED METAMATERIALS | 2021年 / 8卷 / 08期
基金
中国国家自然科学基金; 国家重点研发计划; 上海市自然科学基金; 中国博士后科学基金;
关键词
Metamaterials; magnetic shielding; patterned ferrite;
D O I
10.1051/epjam/2021008
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The magnetic shield plays an important role in magnetic near-field control. However, the requirements of efficiency, ultra thinness, lightness and cheapness are still the challenges. Here, we firstly propose a composite metamaterial in which the mu-near-zero media is covered with a ferrite slab. We verify that this structure can enhance the shielding effectiveness (SE) in a small area. Furthermore, we optimize the magnetic path by changing the bulk ferrite slab into a patterned slab. In this way, significant SE enhancement can be achieved in a large area. Experimental results show that the maximum SE of the composite metamaterial with a patterned ferrite is 20.56 dB, which is nearly 19 dB higher than that of a single ferrite slab with the same thickness of the composite metamaterial. The results on the composite metamaterial would be very useful in the applications involving magnetic shielding.
引用
收藏
页数:6
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