Metamaterial wave absorber and design method

A wave absorber and metamaterial technology, applied in electrical components, magnetic field/electric field shielding, etc., can solve the problem of metamaterial wave absorber absorption rate only reaching 77%, and achieve high absorption rate, high-efficiency absorption, absorption peak The effect of frequency stabilization

Active Publication Date: 2018-11-02
NORTHWESTERN POLYTECHNICAL UNIV
View PDF5 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This design method is blind, and the absorption rate o

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
  • Metamaterial wave absorber and design method
  • Metamaterial wave absorber and design method
  • Metamaterial wave absorber and design method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] Specific embodiment: a metamaterial wave absorber with perfect wave absorption properties and the design of the unit cell structure of the metamaterial wave absorber:

[0048] (1) The metamaterial absorbing structure is generally three-layered, see figure 1 and image 3 . It consists of the uppermost periodic metal structure, the intermediate layer dielectric substrate and the bottommost metal backplane. The upper and lower layers are made of metallic copper with a conductivity of 5.8×10 7s / m, the thickness is 0.035mm, the intermediate layer dielectric substrate is FR-4 (the code of glass fiber epoxy resin copper clad laminate fire-resistant material grade), the relative dielectric constant is 4.9, the loss tangent is 0.025, and the thickness is 0.3 mm.

[0049] Denote R(ω) as the reflectivity, T(ω) as the transmission rate, ω as the incident wave frequency, and the absorption rate A(ω) of the absorbing structure can be expressed as

[0050] A(ω)=1-R(ω)-T(ω)

[00...

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
Login to view more

Abstract

The invention relates to a metamaterial wave absorber and a design method. The metamaterial wave absorber is characterized by comprising a dielectric plate, a metal plate and a metal material having aperiodic structure, wherein the dielectric plate is used as a substrate of the metamaterial wave absorber and is arranged between the metal plate and the metal material having the periodic structure;the metal material having the periodic structure is composed of multiple unit-cell structures which are periodically and repeatedly arrayed; and each unit-cell structure is composed of four T shapesarrayed symmetrically in a rotatable manner. According to a metamaterial absorbing structure disclosed by the invention, under a specific frequency band, the surface impedance of the structure is perfectly matched with the impedance of a free space; meanwhile, the structure has a polarization insensitivity characteristic, has an extremely high absorption rate under different polar angles and is stable in absorbing peak frequency; and within an extremely wide angle range, the wave absorbing structure is extremely high in absorbing stability for oblique incidence TE and TM polaried electromagnetic waves.

Description

technical field [0001] The invention belongs to an electromagnetic metamaterial wave absorber, relates to a metamaterial wave absorber and a design method, in particular invents a novel multi-layer metamaterial wave absorber with perfect wave absorbing performance and a design method. Background technique [0002] Metamaterial absorbers based on the electromagnetic coupling characteristics of electromagnetic metamaterials have perfect wave-absorbing characteristics. For different design goals, the overall wave-absorbing characteristics can be changed by designing different metamaterial configurations or adjusting key parameters, so that metamaterials can be applied to various The frequency band makes it have important application value in the fields of anti-electromagnetic interference and electromagnetic stealth technology. [0003] Document 1 "N.I.Landy, S.Sajuyigbe, J.J.Mock, D.R.Smith and W.J.Padilla. Perfect Metamaterial Absorber [J], Physical Review Letter (2008)" disc...

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
IPC IPC(8): H05K9/00
Inventor 邱克鹏骆越冯树琦张卫红
Owner NORTHWESTERN POLYTECHNICAL UNIV
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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap