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Low-RCS ultra-wideband metamaterial wave absorber with insensitive polarization and capable of transmitting visible light

A visible light and ultra-broadband technology, applied in the direction of electrical components, antennas, etc., can solve the problems of low radar scattering cross-sectional area, low profile, etc., and achieve the effects of good angular stability, large application potential, and easy processing

Active Publication Date: 2020-07-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem that the existing metamaterial absorber cannot simultaneously take into account high transmittance, ultra-broadband absorption, low profile and low radar scattering cross-sectional area, and provides a polarization-insensitive low RCS through visible light Ultra-broadband metamaterial absorber

Method used

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  • Low-RCS ultra-wideband metamaterial wave absorber with insensitive polarization and capable of transmitting visible light
  • Low-RCS ultra-wideband metamaterial wave absorber with insensitive polarization and capable of transmitting visible light
  • Low-RCS ultra-wideband metamaterial wave absorber with insensitive polarization and capable of transmitting visible light

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specific Embodiment approach 1

[0028] Specific implementation mode one: combine Figures 1 to 2 Specifically, this embodiment is a polarization-insensitive low-RCS ultra-broadband ultra-material absorber that transmits visible light. It consists of a patterned resistive film layer, a first transparent substrate, a middle transparent medium layer, and Composed of a second transparent substrate and a transparent conductive film;

[0029] The thickness of the patterned resistive film layer is 0.01 μm to 3 μm; the thickness of the first transparent substrate and the second transparent substrate are both 0.05mm to 2mm; the thickness of the middle transparent medium layer is 1mm to 8mm; The thickness of the transparent conductive film is 0.01 μm to 3 μm;

[0030] The patterned resistive film layer is composed of N×M transparent patterned resistive film units in the array; the N≥12 columns, the M≥12 rows, and the adjacent transparent patterned resistive film units The minimum distance is 0.1mm ~ 5mm;

[0031] T...

specific Embodiment approach 2

[0037] Embodiment 2: This embodiment is different from Embodiment 1 in that: the material of the intermediate transparent medium layer is one or both of transparent polymers and transparent inorganic materials. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0038] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the middle transparent medium layer is air, specifically, the surrounding support frame is prepared from a transparent composite material, and the first transparent substrate is used as the top , with the second transparent substrate as the bottom, and the interior is filled with air. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a low-RCS ultra-wideband metamaterial wave absorber with insensitive polarization and capable of transmitting visible light, and belongs to the field of electromagnetic waves and novel artificial electromagnetic materials. The invention aims to solve the problem that an existing metamaterial wave absorber cannot simultaneously consider high transmittance, ultra-wideband absorption, low profile and low radar scattering sectional area. The low-RCS ultra-wideband metamaterial wave absorber is sequentially composed of a patterned impedance film layer, a first transparent substrate, a middle transparent dielectric layer, a second transparent substrate and a transparent conductive film from top to bottom, wherein the patterned impedance film layer is composed of N*M transparent patterned impedance film units in an array; and the transparent patterned impedance film units are arranged in a manner of overlapping a large circle located in the center and four small circles evenly distributed around the large circle. According to the invention, high transmittance can be maintained, electromagnetic wave absorption and RCS reduction can be realized in an ultra-wide frequency band, and excellent characteristics of polarization insensitivity and low profile and good angle stability are realized at the same time.

Description

technical field [0001] The invention belongs to the field of electromagnetic waves and novel artificial electromagnetic materials. Background technique [0002] Microwave absorbers can effectively absorb incident electromagnetic waves and make them scatter and attenuate without secondary pollution. Applications have a strong demand for broadband absorption. [0003] The typical microwave absorber Salisbury screen absorbs strongly but has a narrow absorption band. In order to further broaden the absorption band, a Jaumann screen is obtained through multi-layer structure design, but the thickness is increased. [0004] The new artificial electromagnetic metamaterial absorber is usually composed of a sub-wavelength periodic conductive pattern layer, an intermediate medium and a ground surface. It can be designed very well, and it is easier to achieve excellent performances such as low profile and strong absorption under broadband. [0005] Through the design of appropriate di...

Claims

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Application Information

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IPC IPC(8): H01Q15/00H01Q17/00
CPCH01Q15/0086H01Q17/008
Inventor 杨磊闵萍萍朱嘉琦宋梓诚张智博张昕宇
Owner HARBIN INST OF TECH
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