A Broadband Absorbing Material Based on Subwavelength Metallic Structure

A metal structure and wave absorbing material technology, applied in electrical components, magnetic field/electric field shielding, antennas, etc., can solve the problems of weak absorption, large quality, narrow absorption frequency band, etc., achieve strong absorption, simple production, increase wave absorption The effect of bandwidth

Active Publication Date: 2016-03-30
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In order to overcome the shortcomings of traditional absorbing materials such as large mass, weak absorption and narrow absorption frequency band of "perfect absorption", this invention proposes a new absorbing material based on sub-wavelength metal structure

Method used

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  • A Broadband Absorbing Material Based on Subwavelength Metallic Structure
  • A Broadband Absorbing Material Based on Subwavelength Metallic Structure
  • A Broadband Absorbing Material Based on Subwavelength Metallic Structure

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Embodiment Construction

[0025] In the present invention, dielectric substrates coated with subwavelength metal structures of different shapes are respectively bonded on the upper and lower surfaces of traditional absorbing materials to form a three-layer structure. The upper surface of the first substrate is covered with periodically arranged rectangular metal structures; the second substrate is a sheet of traditional wave-absorbing material; the upper surface of the third substrate is covered with periodically arranged "back" Zigzag-shaped metal structure; every four rectangular metal structures on the first base material and one "back"-shaped metal structure on the third base material form a periodic unit, and the second base material is separated therebetween.

[0026] Both the first base material and the third base material are FR-4 materials, and the dielectric constant is ε=4.0-4.5.

[0027] The thickness of the first substrate is 0.127mm, and the thickness of the third substrate is 0.4mm to 0....

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Abstract

The invention discloses a broadband wave-absorbing material based on sub-wavelength metal structures, and belongs to the field of microwave absorbing materials. The broadband wave-absorbing material is divided into three layers from top to bottom, namely a first dielectric substrate, a traditional wave-absorbing material substrate and a second dielectric substrate, wherein the first dielectric substrate is covered with rectangular metal structures which are periodically arrayed; the second dielectric substrate is covered with periodically-arrayed metal structures shaped like a Chinese character 'Hui'. On the basis of a traditional wave-absorbing material, the periodic sub-wavelength metal structures are introduced; the electromagnetic wave loss effect of the traditional wave-absorbing material is improved according to the local electromagnetic wave control characteristics of the metal structures; broad bands can be strongly absorbed by virtue of double-layer metal structures. The broadband wave-absorbing material can be used for radar stealth, electromagnetic compatibility, electromagnetic shielding and the like.

Description

technical field [0001] The invention belongs to the design field of microwave absorbing materials, and specifically relates to the design of novel absorbing materials based on sub-wavelength metal structures. Background technique [0002] Nowadays, people are developing and using electromagnetic waves more and more widely. Satellite communication, radar detection, mobile wireless, etc. all use electromagnetic waves as the medium for signal and energy transmission. However, electromagnetic radiation also has its negative effects. For example, the interference of electromagnetic waves will affect the quality of communication and deteriorate the performance of instruments and circuits; electromagnetic radiation will harm human health and affect the environment. deal with. In addition, in the field of national defense and military affairs, as a radar stealth technology to improve the survivability and penetration capabilities of weapon systems and avoid being discovered, identi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00H05K9/00
Inventor 董小春王锐余金清杜春雷邓启凌高洪涛袁桂山史立方
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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