Perfect-absorption incident-angle-adjustable electromagnetic wave-absorbing structure

Abstract

The invention discloses a perfect-absorption incident-angle-adjustable electromagnetic wave-absorbing structure which comprises a first graphene layer, a diaphragm layer, a second graphene layer, a first dielectric substrate, a first metal layer, a second dielectric substrate and a second metal layer which are sequentially stacked from top to bottom. The first metal layer comprises m * n identical first metal units arranged in m rows and n columns, the first metal units, the second dielectric substrate and the second metal layer are respectively provided with m * n metalized through holes which are arranged in m rows and n columns and are through from top to bottom, and by changing bias voltage loaded between the first graphene layer and the second graphene layer, the surface resistance values of the first graphene layer and the second graphene layer can be changed, so that the electromagnetic wave absorbing structure is matched with free space wave impedance at different angles, and perfect absorption of electromagnetic waves at different incident angles is realized; and the perfect-absorption incident-angle-adjustable electromagnetic wave-absorbing structure has the advantages that the perfect absorption incident angle can be regulated and controlled, perfect absorption of electromagnetic waves is achieved, and the method can be applied to actual production.

Description

technical field [0001] The invention relates to an electromagnetic wave-absorbing structure, in particular to an electromagnetic wave-absorbing structure with an adjustable incident angle for perfect absorption. Background technique [0002] As an electromagnetic stealth technology, the electromagnetic absorbing structure can absorb the electromagnetic wave energy incident on the radar surface, reduce the radar scattering cross-sectional area, thereby reducing the possibility of the radar being detected by the enemy, and is widely used in the military field. In recent years, with the diversification of detection methods and the widespread distribution of reconnaissance radars, all-angle and multi-angle electromagnetic stealth technology has become an urgent need to improve the performance of electromagnetic stealth. [0003] The traditional electromagnetic absorbing structure uses materials such as ferrite, metal micropowder and barium titanate to absorb electromagnetic wave...

AI Technical Summary

Problems solved by technology

The first electromagnetic wave-absorbing structure needs to etch the graphene patch into a patterned unit structure, and needs to apply different voltages directly to it to match the input impedance of the entire structure with the free-space wave impedance at different angles. In actual production Cannot apply voltage directly to match impedance at different angles

The second structure requires direct electrical contact between the graphene and the metal, and it also needs to directly apply different voltages to match the input impedance of the entire structure with the free space wave impedance. In actual production, it is also impossible to directly apply voltages to make the Impedance matching

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