Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

A wave absorber and its preparation method

A wave absorber and block technology, applied in the direction of antennas, electrical components, etc., can solve the problem of low electromagnetic wave absorption rate, achieve perfect absorption, and improve the effect of electromagnetic wave absorption rate

Active Publication Date: 2020-08-28
UNIV OF SCI & TECH OF CHINA
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a wave absorber and a preparation method thereof to solve the problem of low electromagnetic wave absorption rate of existing wave absorbers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A wave absorber and its preparation method
  • A wave absorber and its preparation method
  • A wave absorber and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] The above is the core idea of ​​the present invention. In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention Description, obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0044] An embodiment of the present invention provides a wave absorber for absorbing electromagnetic waves, which is applied in technical fields such as radar and photoelectric detection. Such as figure 1 As shown, the absorber provi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a wave absorbing device and a preparation method thereof. The wave absorbing device compriess a substrate, and a first metal electrode, a first metal grating layer, a first dielectric layer, a graphene hyperbolic layer, a second dielectric layer and a second metal grating layer which are located on the substrate in order. The graphene hyperbolic layer comprises alternately arranged multi-layer graphene layers and a third dielectric layer; the second metal grating layer and the first metal grating layer are two-dimensional square periodic arrays, and the period of the second metal grating layer is different from the period of the first metal grating layer. The first metal grating layer and the second metal grating layer respectively provide wave vector compensation toexcite the surface plasmon of the graphene hyperbolic layer, and the incident electromagnetic wave is locally localized in the graphene hyperbolic layer with high loss so that the electromagnetic waves with certain wavelengths are completely absorbed. Moreover, since the periods of the first metal grating layer and the second metal grating layer are different, plasmon waves of two different wavelengths can be excited, thereby achieving perfect absorption of dual wavelengths.

Description

technical field [0001] The present invention relates to the technical field of wave absorbers, in particular to a wave absorber and a preparation method thereof. Background technique [0002] A Perfect Metamaterial Absorber (PMA) is a device that can completely absorb electromagnetic waves. Because metamaterials have extraordinary physical properties that natural materials do not have, and the perfect absorber designed with metamaterials has the advantages of high absorption rate and thin thickness, so the perfect absorber made of metamaterials has been received by people. extensive attention. [0003] In order to solve the problem of fixing the absorption peak of the early metamaterial perfect absorber, researchers have designed some perfect absorbers based on active control materials such as graphene and vanadium dioxide. Because graphene has excellent photoelectric properties, and the Fermi level can be adjusted by chemical doping, gate voltage, etc., the perfect absorb...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00
CPCH01Q15/00H01Q17/007
Inventor 陆亚林黄秋萍赵毅林晓霞何泓川杨萌萌
Owner UNIV OF SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com