Ultra-thin electromagnetic wave absorber based on electrolyte-regulated graphene

Abstract

The invention discloses an ultra-thin electromagnetic wave absorber based on electrolyte-regulated graphene, and belongs to the technical field of microwave devices. The ultra-thin electromagnetic wave absorber comprises four layers of structures overlapped together, specifically including an electrolyte graphene layer, a high-resistance surface layer, a dielectric layer and a metal base plate, wherein the dielectric layer is arranged on the metal base plate, the high-resistance surface layer is arranged on the dielectric layer, and the electrolyte graphene layer is arranged on the high-resistance surface layer. According to the ultra-thin electromagnetic wave absorber based on electrolyte-regulated graphene provided by the invention, the electrolyte-regulated graphene technique is combined with the high-resistance surface layer to design a super wave absorbing device, the device is simple in structure, small in size and convenient to integrate, covers the broadband absorbing of X wave band, has the high absorptivity of more than 90%, is insensitive to incident angles and polarization angles of electromagnetic waves, is applicable to the fields of communication, household consumer electronics and military stealth technologies, and is very high in practicability.

Description

technical field [0001] The invention belongs to the technical field of microwave devices, and in particular relates to an ultra-thin electromagnetic wave absorber based on electrolytic solution regulating graphene. Background technique [0002] Existing absorbers can be divided into three types: narrowband absorbers, multi-frequency absorbers and broadband absorbers according to the absorption bandwidth, which generally adopt a metal-dielectric-metal three-layer structure in structure. Narrow-band absorbers have a strong absorption of single-frequency electromagnetic waves, but because their absorption bandwidth is extremely narrow, they are generally only for a specific frequency, so their applications are very restrictive and cannot be applied to devices. . Multi-frequency absorbers have high absorption of electromagnetic waves of certain specific frequencies, but there are many defects. The frequency of the electromagnetic waves absorbed by the general multi-frequency a...

AI Technical Summary

Problems solved by technology

The frequency of the electromagnetic waves absorbed by the general multi-frequency absorber is scattered, it cannot achieve continuous absorption, and the absorption of several frequencies will compromise with each other, and it cannot be taken into account, resulting in weakened absorption.

Broadband absorbers generally adopt a multi-layer design, and several different structures are superimposed and coupled together, but the existing problem is that the structure is complex and difficult to manufacture

Existing absorbers generally have a narrow absorption angle and are sensitive to the polarization direction of incident electromagnetic waves, which greatly limits the application of existing absorbers

[0003] For electromagnetic waves of a specific frequency, the absorption bandwidth of the existing wave absorber is narrow, and it cannot achieve high absorption in the entire spectral range; the absorption angle is small, and it cannot achieve high absorption in a large angle range; the existing wave absorber It is sensitive to the polarization direction of the incident electromagnetic wave and cannot achieve good absorption

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