Electromagnetic shielding window based on laminated structure of graphene grid and transparent conductive film

Abstract

An electromagnetic shielding optical window based on a graphene mesh and transparent conductive film laminated structure belongs to the optical transparent member electromagnetic shielding technology field, and utilizes the different light transmission and microwave shielding characteristics performed by the graphene mesh films when the graphene mesh films have different mesh unit hole area ratios to organically combine the low-reflection and partial absorption microwave characteristics of the graphene mesh films with the strong electromagnetic reflection characteristics of the high-light transmission conductive films, thereby forming a multilayer structure. The transparent conductive films are used as the transparent reflection layers, and N layers of graphene mesh films separated by the transparent mediums are used as the transparent absorption layers. By the structure, the radio frequency radiation can penetrate the absorption layers repeatedly to be absorbed strongly, so that the strong shielding and low-reflection characteristics are realized, and the visible light has a high light transmission rate by transmitting the laminated structure once. The graphene mesh films have the periodic hole structures, so that the light transmission performance is improved. The electromagnetic shielding optical window solves the problem that a conventional transparent electromagnetic shielding method can not consider the low-electromagnetic reflection, the strong electromagnetic shielding and the high light transmission simultaneously.

Description

technical field [0001] The invention belongs to the field of electromagnetic shielding of optical transparent parts, in particular to an electromagnetic shielding light window based on a laminated structure of a graphene grid and a transparent conductive film. Background technique [0002] With the development of radio, television, wireless communication technology and microwave technology, a large number of radio frequency devices are equipped in various places of human activities, and the spectrum range continues to widen, and the intensity doubles, which not only interferes with electronic equipment, but also affects human health. threaten. This invisible and intangible "electromagnetic pollution" directly acts on machines or human bodies, and is a serious "invisible killer". It has become the fifth largest pollution after air pollution, water pollution, solid waste pollution and noise pollution. Electromagnetic shielding (including absorption and reflection) is the main...

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Problems solved by technology

[0014] The purpose of the present invention is to overcome the shortcomings of the above-mentioned existing transparent electromagnetic shielding technology, especially for the mutual restriction of transparency and conductive shielding ability in the existing reflective transparent shielding technology, it is difficult to take into account high light transmittance and strong microwave shielding efficiency, and reflective electromagnetic shielding technology In order to solve the problem of electromagnetic leakage and secondary pollution caused by signals, an electromagnetic shielding light window based on the laminated structure of graphene grid and transparent conductive film has been developed to achieve the purpose of having high light transmission, low electromagnetic reflection and strong electromagnetic shielding performance at the same time

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