摘 要

随着科学技术的发展，电子产品的使用愈来愈多，电子产品间电磁波相互干扰会对环境造成影响，从而对人类的生存和发展造成很大的危害，所以人们越来越关注电磁波的吸收和防护。

本文制备了以FeNiCo合金纳米粒子为吸波剂的吸波复合材料，选用同轴法测定了样品的电磁参数，运用Ansoft HFSS软件对吸波结构电磁波反射率进行模拟仿真，选用远场RCS测试法测试材料的电磁波反射率，探索了吸波剂含量对材料吸波性能的影响，探索了C型吸波复合材料（磁性吸波复合材料 FSS 磁性吸波复合材料）的吸波性能特点。

结果表明：含FSS吸波复合材料的电磁波反射率与仿真模拟结果基本一致。吸波剂含量为43.5wt%时，随着复合材料的吸波层厚度由1.5mm增加到2.4mm，含有FSS样品的仿真数据中最大吸收峰频率从16.9GHz降低到12.9GHz。当C型吸波复合材料有一面吸波剂含量不变，而另一面吸波剂含量从43.5wt%增加到55.2wt%时，材料的有效带宽反而减小。实验样品最低反射率可达-46.96dB, 有效带宽约10GHz。

本文特色在于以传统吸波复合材料为基础，引入频率选择表面与之相复合，得到了FSS吸波复合材料。

关键词：多元磁性吸收剂;频率选择表面;磁性金属微粉;C型吸波复合材料

Abstract

More and more electronic products have been used with the development of science and technology, but the electromagnetic interference caused by the electronic products has a negative impact on the environment, and is harmful to human survival and development. Therefore, the electromagnetic wave absorption and protection are getting more and more people's attention. In this article, wave-absorbing composites with FeNiCo alloy nanoparticles were prepared. The electromagnetic parameters of the samples were determined by coaxial method. The HFSS Ansoft software was used to simulate the reflectivity of electromagnetic wave absorbing structure. The reflectivity was tested by an far field RCS test method. The effects of absorbing agent content on the reflectivity of composites were studied as well as the wave-absorbing characteristics of C-wave-absorbing composites(magnetic absorbing composite FSS magnetic absorbing composites).

The results show that the measured electromagnetic reflectivity of the sample are basically consistent with the simulation value. When absorbing agent content of 43.5wt%, as the thickness of wave-absorbing composite increasing from 1.5mm to 2.4mm, the maximum absorption peak frequency in the simulated data with FSS sample is reduced from 16.9GHz to 12.9GHz. When the C-wave-absorbing composites has the same absorption agent content on one side, while the other side of the wave absorbing agent content from 43.5wt% to 55.2wt%, the effective absorbing bandwidth of the composites is reduced. The lowest reflectivity of the experimental sample is up to -46.96dB, and the effective bandwidth is about 10GHz.

In this paper, based on the traditional wave absorbing composites, the FSS is introduced into the composites, and the FSS absorbing composites is obtained.

Keywords: Multiple magnetic absorber, frequency selective surface, the magnetic metal powder, C-wave-absorbing composites

目录

第1章 绪论 1

1.1吸波材料简介 1

1.1.1吸波材料工作原理 1

1.1.2吸波材料国内外研究进展 1

1.2 频率选择表面简介 3

1.2.1 频率选择表面原理 3

1.2.2 频率选择表面影响因素及研究方法 3

1.3.本论文的研究目的和内容 4

1.3.1本论文研究目的 4

1.3.2本论文研究内容 5

第2章 吸波复合材料制备 6

2.1实验原料及仪器 6

2.1.1实验原料 6

2.1.2实验仪器 6

2.2试样制备 6

2.2.1同轴圆环试样制备 6

2.2.2吸波复合材料的制备 7

2.3吸波复合材料测试 7

2.3.1吸波材料电磁参数测试 7

2.3.2 FSS吸波复合材料电磁传输性能测试 8

2.4频率选择吸波复合材料的设计与仿真研究 8

2.4.1概述 8

2.4.2仿真设计 9

2.5本章小结 9

第3章 不含FSS吸波复合材料电磁性能 11

3.1吸波剂组成分析 11

3.2吸波复合材料电磁性能 11

3.3吸波层厚度对反射率的影响 12

3.4吸波剂含量对反射率的影响 13

3.5不含FSS吸波复合材料吸波性能 14

3.6 本章小结 14

第4章 含FSS吸波复合材料的吸波性能 15

4.1磁性粉吸波体FSS吸波复合材料反射率特性验证 15

4.2 FSS吸波复合材料的吸波性能 16

4.3 本章小结 17

第5章C型吸波复合材料的吸波性能 18

5.1 C型吸波材料的仿真结果与测试结果 18

5.2吸波剂含量对C型吸波复合材料吸波性能的影响 19

5.3本章小结 21

第6章 结论与展望 22

参考文献.......................................................................................................................................22

致 谢 24