A Metamaterial Triple-Frequency Absorbing Structure Based on Electromagnetic Resonance

A technology of electromagnetic resonance and wave structure, applied in electrical components, antennas, etc., to increase stealth performance, enhance absorption rate, and achieve significant economic and social benefits.

Active Publication Date: 2021-02-09
THE RES INST FOR SPECIAL STRUCTURES OF AERONAUTICAL COMPOSITE AVIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing metamaterial absorption structures only achieve absorption at one or two frequency points

Method used

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  • A Metamaterial Triple-Frequency Absorbing Structure Based on Electromagnetic Resonance
  • A Metamaterial Triple-Frequency Absorbing Structure Based on Electromagnetic Resonance
  • A Metamaterial Triple-Frequency Absorbing Structure Based on Electromagnetic Resonance

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Experimental program
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Embodiment Construction

[0017] In the 3D electromagnetic simulation software CST, construct the three-layer structure model as shown in the figure above. First of all, the bottom layer is a metal backplane, which is set as a metal copper material in the software material property library. Then construct a thick dielectric layer on the metal backplane, and set it to FR4 in the software material property library. Finally, build an FSS metal screen on the dielectric layer, and the material is set to copper foil.

[0018] 1) In the 3D electromagnetic simulation software CST, set the boundary conditions: "unit cell" in the X and Y directions, and "open add space" in the Z direction. That is, the XOY plane is an infinitely expanding unit, and the Z-axis direction is free space.

[0019] 2) When a plane wave is vertically incident on one side of the metamaterial absorber, resonance will be generated at a specific frequency. The absorber achieves absorption rates of 98.9%, 97.6% and 98.4% at 3.39GHz, 4.94...

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Abstract

The invention belongs to the technical field of radome electrical performance design, and relates to a metamaterial triple-frequency wave-absorbing structure based on electromagnetic resonance. The absorbing structure includes an FSS metal screen (1), a dielectric layer (2) and a metal backplane (3), and the FSS metal screen (1) and the metal backplane (3) are respectively installed on the upper and lower sides of the dielectric layer (2) Surface; the FSS metal screen (1) includes a metal micro-unit structure arranged periodically, and the metal micro-unit structure includes a square ring and a Jerusalem ring, and the Jerusalem ring is located in the square ring and coincides with the center of the square ring, Jerusalem The small arms of the ring are respectively parallel to the four sides of the square ring. The invention can effectively increase the absorption frequency band, enhance the absorption rate, increase the stealth performance of the battlefield aircraft, and have remarkable economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of radome electrical performance design, and relates to a metamaterial triple-frequency wave-absorbing structure based on electromagnetic resonance. Background technique [0002] Electromagnetic absorbing material is a very important part of the weapon equipment material system. It can reduce the radar target characteristics of aircraft, thereby improving its battlefield survivability. It is one of the most important stealth methods at present. Metamaterial electromagnetic absorbing structure is a new type of artificially designed composite absorbing material, which is composed of FSS structure and dielectric substrate, and has the characteristics of "thin, light and wide". Its basis is to break through the natural law properties of the original material through the design of the physical structure and the adjustment of the parameters of the electromagnetic components, thereby changing the absorption charact...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/008
Inventor 邓金山郭万振孙冰冰
Owner THE RES INST FOR SPECIAL STRUCTURES OF AERONAUTICAL COMPOSITE AVIC
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