Magnetically tunable wideband microwave filter using ferrite-based metamaterials

被引：86
作者：
Bi, Ke [1 ,2 ]
Zhu, Wenting [1 ,2 ]
Lei, Ming [1 ,2 ]
Zhou, Ji [3 ]
机构：
[1] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
[2] Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China
[3] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 17期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
NEGATIVE REFRACTIVE-INDEX; STOP FILTERS; PASS FILTER;
D O I：
10.1063/1.4918992
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Magnetically tunable wideband microwave filters have been designed and prepared by using ferrite-based metamaterial structures. The microwave properties of the filters have been investigated by experiments and simulations. The negative permeability appears around the ferromagnetic resonance frequency, which leads to a remarkable stopband for the bandstop filter. The bandpass filter is composed of two kinds of ferrite rods with different saturation magnetization. The bandwidth of the passband can be tuned by adjusting the saturation magnetization of the ferrite rods. Both the experimental and the simulated results show that those filters possess magnetically tunable property. This approach opens a way for designing tunable wideband microwave filters. (C) 2015 AIP Publishing LLC.
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页数：4
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