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Broadband polarization insensitive meta-material wave absorber

A broadband polarization and absorber technology, applied in the direction of electrical components, antennas, etc., can solve the problems of narrow working bandwidth, sensitivity to the polarization direction of incident electric field waves, and insensitivity to broadband polarization, and achieve low cost effects

Inactive Publication Date: 2014-03-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem that the traditional metamaterial absorber has a narrow working bandwidth and is sensitive to the polarization direction of incident electric field waves, and now provides a metamaterial absorber that is not sensitive to broadband polarization

Method used

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  • Broadband polarization insensitive meta-material wave absorber
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  • Broadband polarization insensitive meta-material wave absorber

Examples

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specific Embodiment approach 1

[0028] Specific implementation mode one: refer to figure 2 , image 3 and Figure 4 Describe this embodiment in detail, a kind of broadband polarization insensitive metamaterial absorber described in this embodiment, the absorber is a periodic structure, and the absorber of a unit includes: a resonant structure, a dielectric plate 3 and copper foil 4;

[0029] The resonant structure includes: a split resonator ring 1 and a metal sheet 2;

[0030] The split resonant ring 1 and the metal sheet 2 are both rectangular, the opening of the split resonant ring 1 is located in the middle of one side of the rectangular ring, and the opening width is between 0.1 mm and 3.6 mm;

[0031] The metal sheet 2 is located in the ring of the split resonant ring 1, the edge of the metal sheet 2 is parallel to the edge of the split resonant ring 1, and the gap between the metal sheet 2 and the split resonant ring 1 is between 0.8mm and 1.2mm;

[0032] The resonant structure is fixed on one si...

specific Embodiment approach 2

[0033] Embodiment 2: This embodiment is a further description of the broadband polarization-insensitive metamaterial absorber described in Embodiment 1. In this embodiment, the metal sheet 2 is a copper sheet.

specific Embodiment approach 3

[0034] Specific embodiment three: This embodiment is a further description of a broadband polarization-insensitive metamaterial absorber described in specific embodiment one or two. In this embodiment, the thickness of the metal sheet is 0.03mm .

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Abstract

The invention belongs to the technical field of microwave antenna engineering, and discloses a broadband polarization insensitive meta-material wave absorber, for the purpose of solving the problems of narrow working bandwidth and sensitivity of incident electric field wave polarization directions of a conventional meta-material wave absorber. The broadband polarization insensitive meta-material wave absorber comprises a top-layer resonance structure, a middle-layer medium plate and bottom-layer copper foil, wherein the resonance structure comprises an opening resonance ring and a metal sheet disposed in the ring; when electromagnetic waves are incident to the wave absorber, the resonance structure generates a magnetic field loop, the medium plate generates dielectric loss, and electromagnetic energy is converted into heat energy through loss so that loss of the electromagnetic waves is absorbed. The wave absorber has absorption effects for incoming waves from different polarization directions so that the wave absorber is insensitive to the polarization directions of the incoming waves. At the same time, the working bandwidth of the wave absorber reaches 9.20 GHz. The broadband polarization insensitive meta-material wave absorber is applied to the field of electromagnetic interference shielding and stealth technologies and the like.

Description

technical field [0001] The invention belongs to the technical field of microwave antenna engineering. Background technique [0002] Absorbers, also known as wave-absorbing materials, refer to a class of materials that can absorb electromagnetic wave energy projected onto its surface. In engineering applications, in addition to requiring a high absorption rate of electromagnetic waves in a wide frequency band, the absorbing material is also required to have properties such as light weight, temperature resistance, moisture resistance, and corrosion resistance. Traditional absorbers, such as wedge-shaped materials, magnetic absorbers, and Salisbury absorbing screens, have defects such as high density, low operating temperature, or large thickness. [0003] Metamaterials refer to some artificial composite structures or composite materials with extraordinary physical properties that natural materials do not have. Metamaterials represented by left-handed materials, photonic crys...

Claims

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Application Information

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IPC IPC(8): H01Q17/00
Inventor 杨国辉刘晓昕张狂吕玥珑吴群孟繁义傅佳辉
Owner HARBIN INST OF TECH