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

A frequency selective surface with absorption-reflection-absorption properties

A technology of frequency selective surface and absorption characteristics, applied in antennas, electrical components, etc., can solve problems such as large thickness, limited material thickness and weight, affecting antenna radiation performance, etc.

Active Publication Date: 2020-12-29
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past few decades, it has been proposed to use metamaterial absorbers to reduce RCS, but it is usually limited by the thickness and weight of the material itself
In addition, some people use polarization conversion metasurface and artificial magnetic conductor surface to achieve low RCS performance. Although this structure can reduce its own weight to a certain extent, it often has a large thickness.
In addition, achieving low RCS performance in a wider frequency band often affects the radiation performance of the antenna in its operating frequency band 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
  • A frequency selective surface with absorption-reflection-absorption properties
  • A frequency selective surface with absorption-reflection-absorption properties
  • A frequency selective surface with absorption-reflection-absorption properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0015] The present invention provides a frequency-selective surface with absorption-reflection-absorption characteristics. In order to better explain the principle of the present invention, a theoretical analysis can first be carried out on a metal strip with a chip resistor welded in its center. Because when the plane wave is incident, an induced current will be generated on the metal strip, and when the current flows through the chip resistor, the energy of the electromagnetic wave will be dissipated by being converted into heat energy. According to the principle of reciprocity, the metal strip welded with chip resistors in the center can be equivalent to a center-fed dipole antenna, so the current distribution is:

[0016]

[0017] Among them, I 0 is the current amplitude of a fixed size, λ is the wavelength, is the wave number, and l is the lengt...

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
optical bandwidthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a frequency selective surface with an absorption-reflection-absorption characteristic. The frequency selective surface comprises a dielectric substrate and a plurality of metalunits arranged in a rectangular period, wherein the metal units are arranged on the upper surface of the dielectric substrate; each metal unit comprises four identical rectangular metal strips with gaps; each gap is from a vertex to the 3 / 4 part of a long side where the vertex is located; a chip resistor is welded at the 1 / 2 part of the total length of the metal strips; by taking one point in onerectangular metal strip as the rotating center, rotation is performed by 90 degrees, 180 degrees and 270 degrees in sequence; and the positions of the rectangular metal strips which are not crossed and overlapped mutually are determined. A reflective plate as an antenna can ensure the radiation performance of the antenna while reducing the RCS of the antenna.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a frequency selective surface with absorption-reflection-absorption characteristics. Background technique [0002] With the rapid development of stealth technology and wireless communication systems, a platform with low observability is of great significance, and the antenna as a special scattering source, reducing its radar cross section (RCS) has gradually caused more and more attention Notice. In the past few decades, the use of metamaterial absorbers has been proposed to reduce RCS, but it is usually limited by the thickness and weight of the material itself. In addition, some people use polarization conversion metasurface and artificial magnetic conductor surface to achieve low RCS performance. Although this structure can reduce its own weight to a certain extent, it often has a large thickness. In addition, achieving low RCS performance in a wid...

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): H01Q15/00
CPCH01Q15/0013
Inventor 金城张彬超吕奇皓陈建宏
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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