Electromagnetic absorption structure with optical transparency and adjustable wave absorption frequency

Abstract

The invention discloses an electromagnetic absorption structure with optical transparency and adjustable wave absorption frequency, which comprises a first dielectric substrate, a first graphene layer, a diaphragm layer, a second graphene layer, a second dielectric substrate, an indium tin oxide layer, a third dielectric substrate, a dielectric loss layer, a reflecting layer and a fourth dielectric substrate which are stacked in sequence from top to bottom, each graphene frequency selective surface unit in the first graphene layer comprises a square graphene block and four rectangular graphene blocks distributed around the square graphene block, and the structure of the second graphene layer is completely the same as that of the first graphene layer. Each indium tin oxide frequency selective surface unit in the indium tin oxide layer comprises a square indium tin oxide block and four rectangular indium tin oxide blocks distributed around the square indium tin oxide block. The electromagnetic absorption structure has the advantages that the wave-absorbing frequency can be regulated and controlled only by regulating the resistance value of the graphene surface, and the electromagnetic absorption structure has optical transparency and also has adjustable wave-absorbing frequency in a relatively large range.

Description

technical field [0001] The invention relates to an electromagnetic absorption structure, in particular to an electromagnetic absorption structure with optical transparency and adjustable absorption frequency. Background technique [0002] As an electromagnetic stealth technology, the electromagnetic absorption structure can absorb the radar wave energy incident on the surface of the equipment, reduce the radar scattering cross-sectional area, and reduce the radar scattering characteristics of one's own target, so as to achieve low detectability. It is used in military equipment and electronic countermeasures. It is widely used in the field and plays a major role in improving the battlefield survivability of aircraft, ships, etc. [0003] In recent years, with the diversification of detection means and frequency spectrum of reconnaissance and electronic countermeasure systems, multi-spectrum and multi-functional electromagnetic stealth technology has become an urgent need to ...

AI Technical Summary

Problems solved by technology

However, although the existing graphene-based electromagnetic absorption structure has optical transparency, it can only realize the adjustment of the absorption amplitude by adjusting the surface resistance of graphene. If the adjustment of the absorption frequency is to be achieved, it is still necessary to combine graphene and tunable active frequency selective surface, which would destroy the optical transparency of the monolithic structure

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