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Candy-shaped metamaterial wave absorber

A wave absorber and metamaterial technology, applied in antennas, electrical components, magnetic field/electric field shielding, etc., can solve the problems of narrow operating frequency band, low absorption rate, unstable electromagnetic wave absorption rate, etc., and achieve wide operating frequency band and absorption rate High, simple structure effect

Active Publication Date: 2020-07-31
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a candy-shaped metamaterial wave absorber, which solves the problems of the existing metamaterial wave absorber such as low absorption rate, narrow working frequency band, and unstable absorption rate of obliquely incident electromagnetic waves.

Method used

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  • Candy-shaped metamaterial wave absorber

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Embodiment 1

[0026] A candy-shaped metamaterial wave absorber is an infinite periodic structure, including N*M wave absorbing units connected in sequence, and the structural size parameters of each layer of each wave absorbing unit are as follows: the side length p of the wave absorbing unit =13mm, the thickness h of the candy-shaped resistive film 1 1 =0.175mm, the square resistance value R of the candy-shaped resistive film 1=100Ω. The line width of the candy-shaped resistive film 1 is s=0.5mm, the outer diameter of the arc 1-1 is r=3.9mm, the length of the short arm 1-2 is n=1.3mm, and the length of the long arm 1-3 is m=5mm. The thickness of the first PET layer 21 and the second PET layer 24 is the same, the thickness h 2 =0.175mm, thickness h of FR-4 layer 22 3 =0.85mm, the thickness h of the PMMA layer 23 4 = 2.25 mm.

[0027] The simulation results are as Figure 4 , Figure 5 and Figure 6 As shown, the advantages of the candy-type metamaterial wave absorber of the present i...

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Abstract

The invention discloses a candy type metamaterial wave absorbing device. The candy type metamaterial wave absorbing device comprises multiple wave absorbing units continuously arranged along a plane,each wave absorbing unit comprises a square medium substrate formed by performing medium overlaying on a first PET layer, a FR-4 layer, a PMMA layer and a second PET layer with the same size from topto bottom, a square resistive film attached to the lower side of the medium layer and provided with the same medium layer size, and a candy type resistive film attached to the upper side of the mediumlayer; the widths of various parts of the candy type resistive film are same, the candy type resistive film is located above the medium substrate, and the geometric centers of the candy type resistive film and the medium substrate are overlapped. The whole candy type resistive film is an axisymmetric structure and is composed of two sections of equilong arcs, four sections of equilong short armsconnected with two ends of the arcs, and two equilong long arms vertical to four short arms. The candy type metamaterial wave absorbing device disclosed by the invention is high in absorbing rate, wide in working band, and stable in absorbing rate on the electromagnetic wave in oblique incidence.

Description

technical field [0001] The invention belongs to the field of electromagnetic waves and novel artificial electromagnetic materials, and in particular relates to a candy-shaped metamaterial wave absorber. Background technique [0002] The absorbing technology is mainly a class of materials that use absorbing materials to effectively absorb incident electromagnetic waves and make them scatter and attenuate. It converts incident electromagnetic waves into heat energy or other energy through various loss mechanisms of materials to achieve the purpose of absorbing electromagnetic waves. [0003] The metamaterial absorber is a structural absorber. The absorbing array is formed by periodic absorbing units. Each absorbing unit is generally a "sandwich" structure, consisting of a metal pattern on the top layer, a dielectric substrate in the middle layer, and a bottom layer. metal stub or ground plate. The performance of the metamaterial absorber depends largely on the geometric shape...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00H05K9/00
CPCH01Q17/008H05K9/0081
Inventor 杨一宋耀良范事成
Owner NANJING UNIV OF SCI & TECH
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