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

Broadband wave-absorbing frequency selection surface

A technology for selecting the surface and wave frequency, applied in the field of electromagnetic metamaterials, can solve the problems of limited practical application, high surface quality and density, large volume, etc., and achieve the effect of simple structure, easy processing, and good angular stability

Pending Publication Date: 2019-08-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF0 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these absorbers are usually fragile, bulky, with high surface mass and density, which limit their practical applications

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
  • Broadband wave-absorbing frequency selection surface
  • Broadband wave-absorbing frequency selection surface
  • Broadband wave-absorbing frequency selection surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] Such as figure 1 As shown, the broadband wave-absorbing frequency selective surface designed by the present invention includes upper and lower layers of dielectric plates, an air layer is between the two layers of dielectric plates, and the surface of the upper layer of dielectric plates is provided with two ring metal patches arranged periodically, each A square ring metal patch is loaded with a resistor, and the lower dielectric board is a metal plate. Preferably, a resistor is connected in series at the midpoint of each side of each square ring metal patch.

[0019] figure 2 Equivalent circuit diagram of the broadband absorbing frequency selective surface designed for the present invention. Each square ring in the two rings is equivalent to a capacitor (C in the figure 1 、C 2 ), inductance (L 1 , L 2 ) and resistance (R 1...

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
Resistanceaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a broadband wave-absorbing frequency selection surface, and the surface comprises an upper dielectric plate and a lower dielectric plate, wherein an air layer is arranged between the upper dielectric plate and the lower dielectric plate, the surface of the upper dielectric plate is provided with periodically arranged double-ring metal patches, both the inner square ring metal patch and the outer square ring metal patch are loaded with resistors, and the lower dielectric plate is a metal plate. The problems that an existing wave absorber is large in thickness and narrowin wave-absorbing frequency band can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic metamaterials, and in particular relates to a frequency selective surface. Background technique [0002] Frequency Selective Surface (FSS) is composed of periodically arranged metal patches or gaps, which has good spatial filtering characteristics and can reflect out-of-band electromagnetic waves while transmitting in-band electromagnetic waves. [0003] Electromagnetic wave absorbers can be used to reduce the radar scattering cross-sectional area and realize radar stealth. Microwave absorber design requires wide bandwidth and small thickness. The earliest wave absorber, the Salisbury screen, consists of a resistive film, a dielectric, and a metal bottom plate. When the thickness of the medium is a quarter of the wavelength, the free space matches the impedance of the absorber to produce a wave-absorbing effect. However, this absorber has a narrow absorption bandwidth and a thicker thic...

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): H01Q17/00
CPCH01Q17/008
Inventor 王韵文王毅曹群生李黄炎
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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