Infrared transmission microwave broadband metamaterial absorber

Abstract

An infrared transmission microwave broadband metamaterial absorber comprises multiple periodically arranged structural units, wherein each structural unit comprises an upper metal resonant layer, a first layer of dielectric substrate, an intermediate metal resonant layer, a second layer of dielectric substrate and a lower metal mesh layer; the upper metal resonant layer is plated on an upper surface of the first layer of dielectric substrate, the intermediate metal resonant layer is plated on a lower surface of the first layer of dielectric substrate, and the lower metal mesh layer is plated on a lower surface of the second layer of dielectric substrate; and the first layer of dielectric substrate is connected to the second layer of dielectric substrate. The infrared transmission microwavebroadband metamaterial absorber disclosed by the invention can realize absorption and shielding effects on incident electromagnetic waves in 5-20GHz commonly-used microwave radar bands, has an absorption rate of more than 80%, ensures that the electromagnetic waves in an infrared band are permeable, and has very high application prospects in an electromagnetic shielding optical window.

Description

technical field [0001] The invention relates to the technical field of radar stealth and new artificial electromagnetic materials, in particular to an infrared-transmitting microwave broadband metamaterial wave absorber. Background technique [0002] The traditional metamaterial absorber has low absorption intensity for incident electromagnetic waves and narrow absorption bandwidth, which cannot meet the needs in practical applications. [0003] In modern radar and hybrid wireless communication systems, electromagnetic shielding optical windows are often introduced into the design of metamaterial absorbers to meet the needs of multi-spectral applications: that is, while absorbing low-frequency incident electromagnetic waves, the overall structure has high sensitivity to infrared to visible light bands. Transmission target. However, most metamaterial absorbers use a metal plate as the underlying reflective structure, resulting in the impermeability of incident electromagneti...

AI Technical Summary

Problems solved by technology

However, most metamaterial absorbers use a metal plate as the underlying reflective structure, resulting in the impermeability of incident electromagnetic waves in all frequency bands, which greatly limits its application in electromagnetic shielding optical windows.

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