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Ultra-thin electromagnetic wave absorbing surface based on graphene and frequency selective surface

A frequency-selective surface and electromagnetic wave-absorbing technology, which is applied to electrical components, magnetic/electric field shielding, antennas, etc., can solve the problems of passive and non-adjustable electromagnetic wave-absorbing surfaces, and achieve the insensitivity of electromagnetic wave incident angle and polarization angle, Simple structure, good practical effect

Inactive Publication Date: 2018-02-16
SOUTHEAST UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, this type of electromagnetic absorbing surface is still a passive and non-adjustable non-smart device.

Method used

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  • Ultra-thin electromagnetic wave absorbing surface based on graphene and frequency selective surface
  • Ultra-thin electromagnetic wave absorbing surface based on graphene and frequency selective surface
  • Ultra-thin electromagnetic wave absorbing surface based on graphene and frequency selective surface

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation examples. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art all fall into the appended claims of the present application to the amendments of various equivalent forms of the present invention limited range.

[0032] Such as Figure 1-2 As shown, an ultra-thin electromagnetic wave absorber based on electrolyte-regulated graphene, including a four-layer structure stacked together from bottom to top: electrolyte graphene layer 1, isolation layer 2, metal frequency selective surface layer 3, Dielectric layer 4 and metal base plate 5; Dielectric layer 4 is set on metal base plate 5, metal frequency selective surface layer 3 is set on dielectric layer 4, isolation layer 2 is se...

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Abstract

The invention, which belongs to the technical field of microwave devices, discloses an ultra-thin electromagnetic wave absorbing surface based on graphene and a frequency selective surface. The ultra-thin electromagnetic wave absorbing surface is composed of an electrolyte graphene sandwich layer, an isolation layer, a metal frequency selective surface layer, a dielectric layer and metal base plate. According to the ultra-thin electromagnetic wave absorbing surface based on graphene and a frequency selective surface, the electrolyte-controlled graphene technology and the metal frequency selective surface are combined to design a dynamically controlled reflection surface. And thus the ultra-thin electromagnetic wave absorbing surface has a simple structure and is easy to integrate; the reflection coefficient of the device can be regulated dynamically under the external voltage effect to realize two working states: a wave absorbing state and a reflection state; and sensitivity to the incident angle and polarization angle of the incident electromagnetic wave is low. The ultra-thin electromagnetic wave absorbing surface having high practicability is suitable for fields of communication, household consumer electronics and military stealth technologies.

Description

technical field [0001] The invention belongs to the technical field of microwave devices, in particular to an ultra-thin electromagnetic wave-absorbing surface based on graphene and a frequency selective surface. Background technique [0002] Most of the existing electromagnetic absorbing surfaces still have a single function and are non-intelligent and dynamically adjustable. In recent years, with technological progress and engineering needs, in order to meet the needs of high-power microwave weapons, anti-electromagnetic interference and stealth, switch-type dynamically adjustable electromagnetic absorbing surfaces are of great significance. [0003] The traditional frequency selective surface technology has been used in electromagnetic wave absorbing surface devices. For example, the fourth-generation fighter F22 in the United States uses a frequency selective surface radome on the nose radome to provide electromagnetic windows in the band. At the same time, it also prov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/14H01Q17/00H05K9/00
CPCH01Q15/14H01Q17/00H05K9/0088
Inventor 陆卫兵张金陈昊刘震国
Owner SOUTHEAST UNIV
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