Graphene grid and double-layer metal grid transparent electromagnetic shielding device

Abstract

The invention provides a graphene mesh / double-layer metal mesh transparent electromagnetic shielding device having a bidirectional wave-absorbing effect, belongs to the technical field of optical transparent part electromagnetic shielding, the electromagnetic shielding device utilizes different light-transmitting and microwave shielding characteristics which are shown when a graphene mesh film has different mesh unit hole area ratios, characteristics of low reflection and partial absorption of microwaves of the graphene mesh film and a strong electromagnetic reflection characteristic of a high-light-transmitting double-layer metal mesh are organically combined, and the multilayer graphene mesh film is arranged at two sides of the double-layer metal mesh to form a multilayer stacked structure; the double-layer metal mesh is used as a transparent reflecting layer, and N layers of graphene mesh films separated by transparent mediums are used as transparent absorbing layers; the structure can enable radio frequency radiation at two sides of the device to pass through the absorbing layers for many times to be strongly absorbed, bidirectional strong shielding and low reflection characteristics are realized, and visible light only penetrates through the stacked structure only once and a high light transmittance is achieved; and the electromagnetic shielding device solves the problem that an existing transparent electromagnetic shielding method cannot give consideration to bidirectional low electromagnetic reflection, strong electromagnetic shielding and high light transmittance at the same time.

Description

technical field [0001] The invention belongs to the field of electromagnetic shielding of optical transparent parts, in particular to a transparent electromagnetic shielding device of a graphene grid and a double-layer metal grid with two-way absorbing effect. 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

[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 problem of electromagnetic leakage and secondary pollution caused by signals, a graphene grid / double-layer metal grid transparent electromagnetic shielding device with two-way absorbing effect has been developed to achieve strong electromagnetic shielding, high light transmission and low electromagnetic reflection performance at the same time the goal of

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