Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Metal-wire-loading type electromagnetic wave absorption structure improving performances of oblique incidence

A technology of electromagnetic wave absorption and metal wire, which is applied in the direction of electrical components, magnetic field/electric field shielding, etc., can solve the problems of thick thickness, few researches on the wave absorption performance of electromagnetic wave absorbing structures, and good wave absorbing effect at the same time, so as to achieve improvement The effect of microwave absorption performance, simple and mature manufacturing process, and low cost

Inactive Publication Date: 2015-01-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, most electromagnetic absorbing structures (such as Jaumann and circuit analog absorbers) only consider the absorbing performance under vertical incidence, and there are few studies on the absorbing performance of electromagnetic absorbing structures under oblique incidence.
At the same time, the existing published absorbing structures that can improve the performance of oblique incidence are relatively thick, which does not meet the goal of stealth technology to develop towards "wide, light, thin, and strong", and cannot obtain two linear poles well. Polarization (TE polarization and TM polarization) structure absorbing effect is good at the same time

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
  • Metal-wire-loading type electromagnetic wave absorption structure improving performances of oblique incidence
  • Metal-wire-loading type electromagnetic wave absorption structure improving performances of oblique incidence
  • Metal-wire-loading type electromagnetic wave absorption structure improving performances of oblique incidence

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An electromagnetic wave absorbing structure in which periodic metal copper straight wires are embedded in a 2.0mm thick magnetic wave absorbing material. The unit size is: a=5.0mm, t=2.0mm, t 1 =0.8mm, d=0.25mm, l=4.0mm; the range of electromagnetic parameters of magnetic absorbing materials is: the real part of relative permittivity is 7.7~8.4, the imaginary part is 0.1~0.7; the real part of relative permeability is 1.2 ~3.0, the imaginary part is 0.6~1.1.

[0027] In the TE polarization mode, when the periodic metal wire is not loaded, the electromagnetic absorbing structure has better frequency stability, and has better absorbing performance in the angle of incidence range of 0° to 45°; when the loading period is After the metal wire, the oblique incidence performance of the electromagnetic wave absorbing structure has not changed. In the TM polarization mode, when there is no periodic metal wire loaded, the -10dB bandwidth of the electromagnetic absorbing structure at...

Embodiment 2

[0029] In this embodiment, a periodic metal copper straight wire is embedded in a 2.0 mm thick magnetic absorbing material. The unit size is: a=3.0mm, t=2.0mm, t 1 =0.8mm, d=0.25mm, l=2.8mm; the range of electromagnetic parameters of magnetic absorbing materials is: the real part of the relative permittivity is 7.7~8.4, the imaginary part is 0.1~0.7; the real part of the relative permeability is 1.2 ~3.0, the imaginary part is 0.6~1.1.

[0030] In the TE polarization mode, when the periodic metal wire is not loaded, the electromagnetic absorbing structure has better frequency stability, and has better absorbing performance in the angle of incidence range of 0° to 45°; when the loading period is After the metal wire, the oblique incidence performance of the electromagnetic wave absorbing structure has not changed. In the TM polarization mode, when there is no periodic metal wire loaded, the -10dB bandwidth of the electromagnetic absorbing structure at different incident angles is...

Embodiment 3

[0032] An electromagnetic wave absorbing structure is to embed periodic metal copper straight wires in a 1.8mm thick magnetic wave absorbing material. The unit size is: a=4.0mm, t=2.0mm, t 1 =0.8mm, d=0.25mm, l=3.5mm; the range of the electromagnetic parameters of the magnetic plate material is: the real part of the relative permittivity is 7.7~8.4, the imaginary part is 0.1~0.7; the real part of the relative permeability is 1.2~ 3.0, the imaginary part is 0.6 to 1.1.

[0033] In the TE polarization mode, when the periodic metal wire is not loaded, the electromagnetic absorbing structure has better frequency stability, and has better absorbing performance in the angle of incidence range of 0° to 45°; when the loading period is After the metal wire, the oblique incidence performance of the electromagnetic wave absorbing structure has not changed. In the TM polarization mode, when the periodic metal wire is not loaded, the -10dB bandwidth of the electromagnetic absorbing structure...

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

No PUM Login to View More

Abstract

The invention relates to a metal-wire-loading type electromagnetic wave absorption structure improving the performances of oblique incidence, belongs to the technical field of electronic materials, and especially relates to an electromagnetic wave absorption structure and a method therefor. The structure consists of M*N square wave absorption units, wherein M is the number of rows, N is the number of columns, and the M and N are both natural numbers greater than two. Each square wave absorption unit comprises a metal plate and a magnetic wave-absorption material layer disposed on the metal plate, wherein the interior of the wave-absorption material layer is provided with a metal wire, and the direction of the metal wire is parallel to a side of the square wave absorption unit. Moreover, the directions of the metal wires of all the square wave absorption units are the same, and the lengths of the metal wires are less than the side lengths of the square wave absorption units. The structure can enlarge the wave-absorption frequency band under different incidence angles under the condition of reducing or increasing the thickness of the structure.

Description

Technical field [0001] The invention belongs to the technical field of electronic materials, and particularly relates to an electromagnetic wave absorbing structure and a method thereof. Background technique [0002] The demand of information warfare in the new century has greatly promoted the development of stealth technology. As one of the key technologies to win in modern warfare, stealth technology can effectively improve the survivability and penetration capabilities of weapons and equipment, hit the enemy's military targets to the maximum, and change the balance of forces between the two sides. In today's era, with the increasing popularity of electronic products and electromagnetic radiation almost everywhere, electromagnetic "pollution" issues such as electromagnetic interference and electromagnetic compatibility have become issues that affect human health. The shielding effect of electromagnetic absorbing materials can protect the human body, and can effectively resist ...

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 Applications(China)
IPC IPC(8): H05K9/00
Inventor 邓龙江张林博张国瑞周珮珩陆海鹏谢建良
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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