A dual frequency metamaterial absorber

A technology of metamaterials and absorbers, applied to electrical components, antennas, etc., can solve problems such as poor stability, and achieve the effect of wide incident angle and high absorption rate

Active Publication Date: 2017-10-31
HARBIN ENG UNIV
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Problems solved by technology

Traditional radar absorbing materials have shortcomings such as thickness, weight, and poor stability, which have greatly restricted their application.

Method used

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  • A dual frequency metamaterial absorber
  • A dual frequency metamaterial absorber
  • A dual frequency metamaterial absorber

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] combine figure 1 , Fig. 2 (A) and Fig. 2 (B), the present invention is made up of bottom metal thin film 1, middle loss dielectric layer 2 and top layer metal thin film arranged successively from bottom to top, bottom metal thin film 1, middle loss dielectric layer 2 and the top metal film are attached to each other, that is, the bottom metal film 1 and the top metal film of the present invention are respectively attached to both sides of the middle lossy dielectric layer 2, and the bottom metal film 1 is an all-metal film without a hollow structure , the top metal film consists of a metal ring 3 and a metal square ring 4 located in the metal ring 3, the center of the metal ring 3 and the center of the metal square ring 4 and the center of the middle lossy dielectric layer 2 and the bottom metal film 1 The center is on a strai...

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Abstract

The invention provides a dual-frequency metamaterial wave absorber. The dual-frequency metamaterial wave absorber consists of a bottom layer metal film, a middle loss medium layer and a top layer metal film arranged in sequence from bottom to top, wherein the bottom metal film, the middle loss medium layer and the top metal film are jointed together; the bottom layer metal film is an all-metal film; the top layer metal film comprises a metal circular ring and a metal square ring positioned in the metal circular ring; the center of the metal circular ring, the center of the metal square ring, the center of the middle loss medium layer and the center of the bottom layer metal film are positioned on the same straight line; the four corners of the metal square ring are over against the middle points of the four edges of the middle loss medium layer respectively. The dual-frequency metamaterial wave absorber provided by the invention has the characteristics of high wave absorbing rate, polarization insensitivity, wide incident angle characteristic and two wave-absorbing peak points.

Description

technical field [0001] The invention relates to a metamaterial wave absorber, in particular to a dual-frequency metamaterial wave absorber. Background technique [0002] Radar absorbing material is a kind of functional material that can effectively absorb incident electromagnetic waves and significantly reduce the echo intensity of the target. It can greatly reduce the radar cross section of the target, thereby improving its stealth performance. Traditional radar absorbing materials have disadvantages such as thickness, weight, and poor stability, which greatly restrict their application. [0003] Metamaterials refer to some artificial composite structures or composite materials with extraordinary physical properties that natural materials do not have. Metamaterial absorber, also known as metamaterial absorbing structure, as a new artificial electromagnetic material, has attracted extensive attention of researchers in recent years due to its advantages of simple structure, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00
Inventor 周凯田春胜由丽管有林
Owner HARBIN ENG UNIV
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