Magnetically tunable wideband microwave filter using ferrite-based metamaterials
Magnetically tunable wideband microwave filter using ferrite-based metamaterials
复制标题
使用铁氧体基超材料的磁性可调谐宽带微波滤波器
DOI：
10.1063/1.4918992
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发表时间：
2015
影响因子：
4
通讯作者：
Zhou Ji
中科院分区：
文献类型：
--
作者：
Bi Ke;Zhu Wenting;Lei Ming;Zhou Ji
利用铁氧体超材料结构设计并制备了磁可调宽带微波滤光片。通过实验和模拟研究了滤光片的微波特性。在铁磁共振频率附近出现负磁导率，导致带阻滤光片出现明显的阻带。带通滤光片由两种不同饱和磁化强度的铁氧体棒组成。通带的带宽可以通过调节铁氧体棒的饱和磁化强度来调节。实验和模拟结果均表明，该滤波器具有磁调谐特性。这种方法为设计可调谐宽带微波滤波器开辟了一条道路。
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.