Electromagnetic wave absorption properties of amorphous alloy-ferrite-epoxy composites in quasi-microwave band

被引：54

作者：

Lim, KM ^{[1
]}

Kim, MC

Lee, KA

Park, CG

机构：

[1] Pohang Univ Sci & Technol, Dept Mat Sci & Engn, Pohang 790784, South Korea

[2] RIST, Casting Proc Res Team, Pohang 790785, South Korea

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2003年 / 39卷 / 03期

关键词：

amorphous alloy-ferrite-epoxy composite; absorber; complex permeability and permittivity; impedance matching;

D O I：

10.1109/TMAG.2003.810619

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：

We report on the electromagnetic wave absorption properties of amorphous alloy-ferrite-epoxy composites with various amorphous alloy fractions in the frequency range from 1 to 5 GHz. We varied the fraction of amorphous alloy in amorphous alloy-ferrite-epoxy composites from 0 to 50 vol. % at a fixed 50 vol.% fraction of epoxy resin polymer. We measured the complex permeability mu and permittivity epsilon of composites by the reflection/transmission technique, and determined the theoretical matching frequency and thickness with maximum reflection loss by plotting the measured mu and epsilon on an impedance matching solution map. The increasing amorphous alloy fraction in amorphous alloy-ferrite-epoxy composites resulted in a larger matching frequency and thinner thickness than those of ferrite-epoxy composite. On the basis of these results, we propose a new, thinner wave absorber, made by optimizing the amorphous fraction and thickness,in amorphous alloy-ferrite-epoxy composites.

引用

页码：1836 / 1841

页数：6

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