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Broadband radar wave-absorbing metamaterial and preparation method thereof

A metamaterial and radar technology, applied in additive processing, manufacturing auxiliary devices, processing data acquisition/processing, etc., can solve the problems of limiting the application of radar absorbing metamaterials, complex 3D printing process, unclear theoretical guidance, etc. Strong designability, shortening processing cycle, and effectively absorbing the effect of frequency bandwidth

Pending Publication Date: 2022-08-09
中国人民解放军火箭军工程大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method mainly achieves impedance gradients through different dielectric materials, and the 3D printing process is relatively complicated.
[0005] To sum up, the design of the existing broadband radar absorbing metamaterials based on 3D printing technology still has the problem of unclear theoretical guidance, and it cannot be well combined with the electromagnetic properties of the material itself, thus limiting the radar absorbing metamaterials. The application of materials; at the same time, due to the use of various 3D printing materials, the printing process is more complicated

Method used

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  • Broadband radar wave-absorbing metamaterial and preparation method thereof
  • Broadband radar wave-absorbing metamaterial and preparation method thereof
  • Broadband radar wave-absorbing metamaterial and preparation method thereof

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Embodiment 1

[0054] Aiming at the problems existing in the prior art, this embodiment provides a broadband radar absorbing metamaterial based on a quarter-wavelength interference model and a design and preparation method thereof. One-wavelength interference thickness is used to design hollow cell structures with different dimensions, and then a three-dimensional model is constructed based on the optimized hollow cell structure size parameters.

[0055] Specifically, see figure 1 , figure 1 It is a schematic flowchart of a preparation method of a broadband radar wave-absorbing metamaterial provided by an embodiment of the present invention, which includes:

[0056] S1: Preparation of 3D printing materials with electromagnetic wave absorbing function.

[0057] S11: Weigh a certain proportion of the powder of the wave absorbing agent and the base material, and after removing the moisture, mix the two evenly to obtain the wave absorbing raw material powder; wherein, the filling amount of the...

Embodiment 2

[0101] This embodiment also provides a broadband radar wave-absorbing metamaterial, which includes several hollow cell structures, and each hollow cell structure includes several wave-absorbing layers of different sizes; wherein the size of the wave-absorbing layers is based on 3D printing The fundamental complex permittivity and complex permeability of the material are designed based on a quarter-wavelength interference model.

[0102] In this embodiment, the bottom wave absorbing layer of the hollow cell structure is a solid geometric body, and its thickness is d 1 ;

[0103] The upper wave absorbing layer of the hollow unit structure is a number of hollow geometric bodies of different sizes, and the thickness is d from bottom to top 2 -d 1 , d 3 -d 2 , ..., d n -d n-1 ;

[0104] where d 1 ...d n respectively represent the quarter-wavelength interference thickness at different frequencies, and its calculation formula is:

[0105]

[0106] where c is the speed of...

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Abstract

The invention discloses a preparation method of a broadband radar wave-absorbing metamaterial. The preparation method comprises the following steps: preparing a 3D printing material with an electromagnetic wave-absorbing function; testing the basic complex dielectric constant and complex permeability of the 3D printing material; according to the basic complex dielectric constant and the complex permeability, designing wave absorbing layers with different sizes based on a quarter-wavelength interference model to form a hollow unit structure; and establishing a structure model of the radar wave-absorbing metamaterial according to the hollow unit structure, and printing by adopting a 3D printing technology to obtain the broadband radar wave-absorbing metamaterial. According to the invention, a quarter-wavelength interference theory model is utilized, and the basic complex dielectric constant and complex permeability characteristics of the 3D printing material with the wave-absorbing function are combined, so that hollow unit structures with wave-absorbing layers with different boundary dimensions are designed, the wave-absorbing frequency band is effectively widened, a new thought is provided for design and preparation of a broadband structure type wave-absorbing material, and the application prospect is wide. And the application value of the radar wave-absorbing metamaterial is maximized.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave absorbing materials, and in particular relates to a broadband radar wave absorbing metamaterial and a preparation method thereof. Background technique [0002] Stealth technology is an important means to improve the battlefield survival and penetration attack capabilities of weapons and equipment. The development of stealth technology is of great significance to enhance the combat effectiveness of weapons. Absorbing materials are an important way to realize radar stealth technology. In practical applications, they can be mainly divided into coating absorbing materials and structural absorbing materials. Coated absorbing materials are mostly composed of resins and dielectric or magnetic absorbing agents, and it is difficult to achieve effective absorption of electromagnetic waves in a wide frequency band. The broadband structural radar absorbing materials based on metamaterial design ...

Claims

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Application Information

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IPC IPC(8): H05K9/00B29C64/393B29C64/386B33Y50/00B33Y50/02B33Y70/10B29C48/00
CPCH05K9/0088B29C64/386B29C64/393B33Y50/00B33Y50/02B33Y70/10B29C48/023Y02P10/25
Inventor 汪刘应葛超群刘顾王龙陈孟州
Owner 中国人民解放军火箭军工程大学