Effect of FeCoB-SiO2-Film-Based Fractal Frequency Selective Surface on the Absorption Properties of Microwave Absorbers

被引：10
|
作者：
Liao, Zhangqi [1 ]
Nie, Yan [1 ]
Ren, Wenyi [1 ]
Wang, Xian [1 ]
Gong, Rongzhou [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Dept Elect Sci & Technol, Wuhan 430074, Peoples R China
来源：
IEEE MAGNETICS LETTERS | 2010年 / 1卷
关键词：
Soft magnetic materials; FeCoB-SiO2 thin films; fractal; frequency selective surfaces (FSSs); microwave absorbers;
D O I：
10.1109/LMAG.2010.2076400
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The effects of FeCoB-SiO2-film-based fractal frequency selective surface (FSS) on the absorption properties of multilayer microwave absorbers (MMA) were investigated in detail. These magnetic films were prepared in argon pressure by radio frequency magnetron sputtering targets of SiO2 and Fe40Co40B20. Laser etching was used to fabricate FSS samples using the prepared magnetic films (SFSS) and comparative nonmagnetic aluminum film (AFSS). The reflection properties of the MMAs were measured in the range 2-18 GHz. The combined samples decreased the reflectivity by 50% and increased the bandwidths under -5 dB by 100% by substituting SFSS for AFSS, with the absorbing peak frequencies almost kept unchanged. The 0.67-mm-thick MMA samples that SFSS and AFSS both used could further enhance the minimum peak vale to -9.84 dB and broaden the bandwidth under -5 dB to 5.36 GHz. As a consequence, magnetic-film-based fractal FSSs are able to strongly improve absorption characteristics in microwave absorbers.
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页数：4
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