A broadband microwave absorbing structure with high light transmission and high screen efficiency
A wave structure and broadband technology, applied in the field of broadband microwave absorbing structures
Active Publication Date: 2021-07-06
NANJING UNIV OF SCI & TECH
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Problems solved by technology
In recent years, research on high-transmittance microwave absorbers has developed rapidly at home and abroad, but broadband microwave absorbers with high screen efficiency and high light transmittance have not been reported yet.
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Embodiment
[0024] In order to verify the effectiveness of the solution of the present invention, the following simulation experiments are carried out.
[0025] First, design and optimize the underlying 4-layer micron-scale metal grid structure C, where F2, F3, F4, and F5 represent the silver grids corresponding to the upper and lower positions of the four layers. The grid structure is completely consistent, and the grid projections overlap. D3, D4 , D5 represents the glass sandwiched between every two layers of silver grids.
[0026] The first step is to determine the size parameters of the grid. The smaller the ratio between the line width w of the grid line and the distance d_line between two adjacent silver lines forming the grid, the higher the transparency of the grid structure . In this embodiment, w:d_line is set to 1:20 to achieve transparency of the overall structure >90%. When the w:d_line ratio is fixed, the smaller the grid line width w is, the better the electromagnetic sh...
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Abstract
The invention discloses a broadband microwave absorbing structure with high light transmission and high screen effect, comprising a first dielectric layer on the top layer, a low-frequency wave absorbing layer in the middle, and a multi-layer micron-scale metal grid layer on the bottom layer, wherein The low-frequency wave absorbing layer is composed of a second dielectric layer and a low-frequency wave absorbing structure located on the second dielectric layer. The first metal mesh between the second dielectric layer and the third dielectric layer, the second metal mesh between the third dielectric layer and the fourth dielectric layer, the second metal mesh between the fourth dielectric layer and the fifth dielectric layer The third metal grid is composed of a fourth metal grid located under the five dielectric layers. The invention has ultra-wideband, high shielding efficiency and high absorption rate, can be used for absorbing and shielding electromagnetic waves in a specific frequency range, and improves the stealth ability and anti-electromagnetic interference ability of the equipment.
Description
technical field [0001] The invention relates to electromagnetic technology, in particular to a broadband microwave absorbing structure with high light transmission and high screen efficiency. Background technique [0002] Electromagnetic weapons represented by high-power microwave weapons and electromagnetic bombs are developing rapidly, and the information and control systems of weapons and equipment are facing serious threats of electromagnetic damage. The optical window is the main window for electromagnetic energy coupling. When attacked by electromagnetic weapons, it will cause electromagnetic damage to the electronic information system. Therefore, these optical windows require both electromagnetic shielding and wave-absorbing stealth. In recent years, the research on high-transmittance microwave absorbers has developed rapidly at home and abroad, but broadband microwave absorbers with high screen efficiency and high light transmittance have not been reported yet. Co...
Claims
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IPC IPC(8): H01Q17/00H05K9/00
CPCH01Q17/00H05K9/0088
Inventor 顾文华吴杨慧宗志园陈彬王俊杰
Owner NANJING UNIV OF SCI & TECH