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Broadband transparent wave-absorbing material based on double-layer conductive film

A wave-absorbing material and conductive film technology, applied in the direction of electrical components, antennas, etc., can solve the problems of difficult large-scale preparation, non-transparent visible light, poor wave-absorbing performance, etc., and achieve no need for etching processing, small visual impact, and easy preparation Effect

Inactive Publication Date: 2020-09-04
AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional absorbing materials such as absorbing patches, absorbing coatings, absorbing cones, etc. Although these absorbing materials can achieve broadband absorption, they are opaque to visible light, which limits their use in cabs, microwave darkrooms, shielding Applications in rooms and other occasions that require light transparency
At present, some transparent electromagnetic wave absorbing materials have been developed, but they have problems such as poor absorbing performance, low light transmittance, complicated preparation process, difficulty in large-scale preparation, and low structural strength, making it difficult for practical application

Method used

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  • Broadband transparent wave-absorbing material based on double-layer conductive film
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  • Broadband transparent wave-absorbing material based on double-layer conductive film

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Such as figure 1 , 2 A broadband transparent absorbing material based on a double-layer conductive film is shown, including a first transparent medium layer and a third transparent medium layer, a first transparent conductive film and a second transparent conductive film, and a second transparent medium layer in the middle . External incident electromagnetic waves act on the designed wave-absorbing material from the first transparent medium layer, and both the first conductive film and the second conductive film are located on the side of the transparent medium substrate away from the incident wave.

[0049] In this embodiment, for the selection of materials, the first transparent medium layer is made of high boron glass, the second transparent medium layer is made of soda lime glass, the bonding material is SGP, and the transparent conductive material is ITO. It should be understood that, for the broadband absorbing material based on the double-layer transparent cond...

Embodiment 2

[0053] Embodiment 2 has the same structure as Embodiment 1, only the following parameters have been adjusted:

[0054] The third transparent medium layer is made of high boron glass, the dielectric constant is 4.8*(1-j0.003), and the thickness d of the third transparent medium layer 3 3mm.

[0055] Figure 5 It is the reflection characteristic curve of the broadband transparent absorbing material based on the double-layer transparent conductive film corresponding to Example 2 of the present invention. It can be seen that the reflections in the 5.2-15.2GHz frequency band are all lower than -10dB. Figure 6 It is the transmission characteristic curve of the broadband transparent absorbing material based on the double-layer conductive film corresponding to Example 2 of the present invention. It can be seen that the transmission in the 0-18GHz frequency band is all lower than -24dB.

Embodiment 3

[0057] Embodiment 3 has the same structure as Embodiment 1, only the following parameters have been adjusted:

[0058] The first transparent medium layer adopts polymethyl methacrylate, its dielectric constant is 3.0*(1-j0.003), the thickness d of the first transparent medium layer 1 is 3.7mm. Thickness d of the second transparent medium layer 2 is 1.3mm. The third transparent medium layer adopts polymethyl methacrylate, its dielectric constant is 3.0*(1-j0.003), the thickness d of the third transparent medium layer 3 is 2.3mm. The transparent conductive material used for the conductive film layer is FTO.

[0059] Figure 7 It is the reflection characteristic curve of the broadband transparent absorbing material based on the double-layer conductive film corresponding to Example 3 of the present invention. It can be seen that the reflection in the 6.0-17.7GHz frequency band is all lower than -10dB, and the reflection in the 7.7-15.8GHz frequency band is lower than -10dB. ...

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Abstract

The invention discloses a broadband transparent wave-absorbing material based on a double-layer conductive film. The material comprises a three-layer transparent medium, and a transparent conductive film is arranged on one surface of two transparent medium plates. The resistance value of the conductive film and the wave absorbing structure are optimally designed, so that incident electromagnetic waves with a relatively wide frequency band are lost in a wave absorbing body. Via such structure, broadband absorption can be achieved, meanwhile, high visible light permeability is achieved, the double-layer resistive film is not provided with a common pattern structure, etching is not needed, and therefore the machinability of the broadband wave absorber is high. The material of the invention has the advantages that the unit structure is simple, the thickness is small, the absorption frequency band of the microwave band electromagnetic wave is wide, the transmittance of the microwave band electromagnetic wave is low, the transmittance of visible light is high, and the manufacturing cost is low.

Description

technical field [0001] The invention relates to the technical field of electromagnetic stealth, in particular to a broadband transparent wave-absorbing material based on a double-layer conductive film. Background technique [0002] With the development of modern science and technology, various detection technologies and electromagnetic interference signals are continuously enhanced, and the requirements for materials with broadband and high-efficiency absorption of electromagnetic waves are getting higher and higher. Microwave absorbing materials can effectively absorb and attenuate incident electromagnetic waves and are widely used in military stealth, electromagnetic shielding and other electromagnetic protection. Traditional absorbing materials such as absorbing patches, absorbing coatings, absorbing cones, etc. Although these absorbing materials can achieve broadband absorption, they are opaque to visible light, which limits their use in cabs, microwave darkrooms, shield...

Claims

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Application Information

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IPC IPC(8): H01Q17/00
CPCH01Q17/00H01Q17/008
Inventor 尹生龙昌王俊鹏陈路王彦淇丁铁伢
Owner AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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