High electromagnetic shielding light window of graphene mesh and double-layer metal mesh composite laminating structure

Abstract

A electromagnetic shielding light window of a graphene mesh and double-layer metal mesh composite laminating structure belongs to the optical transparent-component electromagnetic shielding technology field. By using the electromagnetic shielding light window, a characteristic that a graphene mesh film expresses different light transmission and microwave shielding characteristics when possessing different mesh unit trepanning area ratios is used to organically combine a low reflection and partial absorbed microwave characteristic of a graphene mesh film and a high electromagnetic reflection characteristic of a high-light-transmission double-layer metal mesh so as to form a multilayer structure. The double-layer metal mesh is taken as a transparent reflecting layer and N graphene mesh films which are separated by a transparent medium are taken as transparent absorption layers. By using the structure, a radio frequency can radiate several times, pass through an absorption layer and is highly absorbed so that high shielding and low reflection characteristics are realized. Visible light penetrates the laminating structure for one time and high light transmittance is possessed. The graphene mesh films have periodical trepanning structures so that light transmittance performance is increased. In an existing transparent electromagnetic shielding method, high light transmission, low electromagnetic reflection and high electromagnetic shielding can not be realized simultaneously. By using the electromagnetic shielding light window, the above problem is solved.

Description

technical field [0001] The invention belongs to the field of electromagnetic shielding of optical transparent parts, in particular to a strong electromagnetic shielding light window with a composite laminated structure of graphene grids and double-layer metal grids. 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 th...

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Problems solved by technology

[0021] 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 In order to solve the problems of electromagnetic leakage and secondary pollution caused by signals, a strong electromagnetic shielding light window with a composite laminated structure of graphene grid and double-layer metal grid has been developed to achieve strong electromagnetic shielding, high light transmission and low electromagnetic reflection performance at the same time. Purpose

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