超材料复合吸波体的设计与研制

Design and Development of Metamaterial Composite Absorber

目的研制一种比传统吸波材料雷达波衰减更强、合格频带更宽的新型吸波材料。方法设计超材料谐振单元图案及其组合排列方式,采用丝网印刷工艺在介质基板上制作超材料吸波体,与传统吸波材料复合形成超材料复合吸波体。通过对比分析不同介质基板、谐振单元图案及组合方式、导电炭黑含量对复合吸波体的性能影响规律。结果超材料复合吸波体能实现比传统吸波材料,在12~17 GHz峰值反射率最大降低−20 dB;在2~18 GHz反射率低于−20 dB的带宽拓展17.7%。结论新研制的超材料复合吸波体实现了峰值衰减更强与合格带宽拓宽的研究目的,对未来吸波材料的发展极具研究价值与方向指引。

The paper aims to develop a kind of new absorbing material that is of stronger radar wave attenuation and wider qualified bandwidth compared with traditional material.The metamaterial patterns in resonance unit and its combinations were designed.A metamaterial absorber was manufactured on a dielectric substrate by silk-steel screen printing process,and the metamaterial absorber was formed on the dielectric substrate and then compounded with traditional absorber to form metamaterial composite absorber.Different dielectric substrates,resonance unit patterns and combinations,conductive carbon black content on the performance of the absorber were comparatively analyzed.The experiments showed that metamaterial absorber can achieve a maximum reduction of bandwidth expansion that was−20 dB in peak reflectivity at 12~17 GHz and 17.1%when reflectivity was lower than−20 dB at 2~18 GHz compared with traditional absorber.The newly developed metamaterial composite absorber accomplishes the research goals of stronger decline in peak and wider qualified bandwidth,and have research value and direction guidance in development of future absorbing materials.