Graphene grid and transparent conductive film two-way absorbing transparent electromagnetic shielding device

Abstract

A bidirectional wave absorption transparent electromagnetic shielding device based on graphene meshes and transparent conductive films 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, and the graphene mesh films are placed at the two sides of the transparent 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 coming from the two sides can penetrate the transparent absorption layers simultaneously and 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 multilayer structure once. The electromagnetic shielding optical window solves the problem that a conventional transparent electromagnetic shielding method can not consider the bidirectional 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 a bidirectional wave-absorbing transparent electromagnetic shielding device based on 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...

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Problems solved by technology

[0014] The purpose of the present invention is to overcome the deficiencies 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 To solve the problem of electromagnetic leakage and secondary pollution caused by signals, a two-way absorbing transparent electromagnetic shielding device based on graphene grid and transparent conductive film has been developed to achieve the purpose of having two-way low electromagnetic reflection, strong electromagnetic shielding and high light transmission performance at the same time

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