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摘要
针对当前常规的吸波超材料大多数均基于稳定的单一的各向同性的介质基底进行的结构设计,对各向异性介质的超材料结构设计研究较少,提出了以各向异性介质为基底设计吸波超材料结构的理念,采用各向异性物质的独特性质,可实现多功能一体化。以复杂的芳纶纤维复合板作为介质基底,以铜膜为微结构层,设计多层吸波超材料结构,并通过刻蚀及热压复合工艺制得宽频吸波超材料,最终实现在7GHz～22GHz频段内的反射率小于-10dB,吸收率达到90%以上,在7.7GHz处,电磁强度最大达到5.5×104V/m,磁场强度最大达到1.0×102A/m,填补了各向异性多层介质的超材料设计的空白。
Abstract
For most of structural design of current conventional absorbing metamaterials are based on a stable single isotropic dielectric substrate,the metamaterials structure design of anisotropic media is less studied.The idea of designing absorbing metamaterials structure based on anisotropic media was proposed,the unique properties of anisotropic materials were used to achieve multi-functional integration.A multi-layered microwave-absorbing metamaterials structure was designed by using a complex Kevlar fiber composite board as the dielectric substrate and copper film as the microstructure layer.The preparation was carried out by etching process and thermoforming tank molding.Finally its reflectance was less than -10dB in the 7GHz～22GHz band,absorption rate reached 90%,at the 7.7GHz,the electromagnetic strength reaches a maximum of 5.5×104V/m,and the magnetic field strength reached a maximum of 1.0×102A/m.The blank of the metamaterials design of anisotropic multi-layer medium was filled.
关键词
各向异性介质
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多层
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宽频
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吸波
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超材料
Key words
anisotropic media
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multi-layer
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broad band
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microwave absorpting
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metamaterial
基于各向异性介质的宽频吸波超材料结构设计与研究[J].
化工新型材料, 2020, 48(1): 131-134 DOI:
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基金资助
装备发展部共用技术资助项目(33KJ1707YY034A);装备发展部重点实验室基金资助项目(33KJ1707JJ039B)
