Absorbing properties and structural design of microwave absorbers based on W-type La-doped ferrite and carbon fiber composites

被引：114

作者：

Shen, GZ ^{[1
]}

Xu, Z ^{[1
]}

Li, Y ^{[1
]}

机构：

[1] Tongji Univ, Sch Mat Sci & Engn, Inst Microelect, Shanghai 200092, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2006年 / 301卷 / 02期

关键词：

ferrite; carbon fiber; reflectivity; double-layer absorber;

D O I：

10.1016/j.jmmm.2005.07.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Sol-gel method was used to prepare W-type BaCo2Fe16O27 hexaferrite and La-doped Ba0.7La0.3Co2Fe16O27 hexaferrite. Electromagnetic parameters of the ferrites and short carbon fiber composites were measured, and reflectivity was calculated according to transmission-line theory in the range 12.4-18 GHz. The results show that reflection loss of the doped ferrite composite is higher as compared to the no doped ferrite composite. Based on the above calculation, double-layer absorbers containing La-doped ferrite and carbon fiber composites were designed, and reflectivity of the double-layer absorbers made of different thickness and composition was calculated. Finally, a kind of structural absorber having excellent absorbing properties was achieved, and the bandwidth of the reflection loss less than -10dB can reach 5.2GHz in the range of 12.4-18 GHz. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：325 / 330

页数：6

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