A dielectric structure multi-band radar absorbing material based on low dielectric constant material

A technology of low dielectric constant material and radar absorbing material, which is applied in the field of radar absorbing material and dielectric structure type multi-band radar absorbing material, can solve the problems of complex preparation process, less absorbing frequency band and high cost, and achieves high processing cost. Simple process conditions, good oxidation and corrosion resistance, and low cost

Active Publication Date: 2019-11-12
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the existing multi-frequency radar absorbing materials mainly based on high dielectric constant absorbing materials, the preparation process is complicated, the cost is high, the damage is easy, and the absorbing frequency band is small (currently, absorbers designed with two kinds of media are only Possess shortcomings and deficiencies such as dual-frequency absorption effect), the object of the present invention is to provide a kind of dielectric structure type multi-band radar absorbing material based on single low dielectric constant material preparation, the design of this dielectric structure type multi-band radar absorbing material Simple, low cost, easy to shape, strong operability, suitable for radar absorbing, electromagnetic compatibility protection, electromagnetic resonator and radio frequency and other fields

Method used

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  • A dielectric structure multi-band radar absorbing material based on low dielectric constant material
  • A dielectric structure multi-band radar absorbing material based on low dielectric constant material
  • A dielectric structure multi-band radar absorbing material based on low dielectric constant material

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Embodiment 1

[0046] The absorber is a periodic array structure, and the structure of a periodic unit: along the incident direction of the electromagnetic field, the first layer is a structured dielectric layer 1, using a hole structure 1; the second layer is a structured dielectric layer 2, using a hole structure 2 ; The third layer is a total reflection plate 3 . Structural diagram such as figure 1 a, The absorber is a periodic structural unit, and the side length of a unit is L=18mm. Such as figure 1 b Pore structure 1 is a metamaterial with rectangular holes, and the pore length is l 1 =15mm, the aperture width is w=7mm; the material is FR4, the dielectric constant is 4.3, and the loss tangent is 0.025. Such as figure 1 c Hole type structure 2 is a square hole metamaterial, and the side length of the square hole is l 2 =15mm; the material is FR4, the dielectric material is 4.3, and the loss tangent is 0.025. Both layers of dielectric have the same thickness d 1 = d 2 = 1.5 mm...

Embodiment 2

[0048] The absorber is a periodic array structure, and the structure of a periodic unit: along the incident direction of the electromagnetic field, the first layer is a structured dielectric layer 1, which adopts a double rectangular cross structure; the second layer is a flat dielectric layer 2, which adopts a flat structure; Three layers are total reflection plates 3 . Structural diagram such as figure 2 a, The absorber is a periodic structural unit, and the side length of a unit is L=18mm. Such as figure 2 b is a double rectangular cross structure, the length of the rectangle is l=15mm, the width of the rectangle is h=7mm; the material is FR4, the dielectric constant is 4.3, the loss tangent is 0.025, and the thickness is 1.5mm. Such as figure 2 c is a square plate structure, the side length and unit size are 18mm; the material is FR4, the dielectric constant is 4.3, and the loss tangent is 0.025. Both layers of dielectric have the same thickness d 1 = d 2 = 1.5 mm...

Embodiment 3

[0050] The absorber is a periodic array structure, and the structure of a periodic unit: along the incident direction of the electromagnetic field, the first layer is a structured dielectric layer 1, which adopts a "convex"-shaped hole structure; the second layer is a structured dielectric layer 2, which adopts The hole structure is square, and the bottom edge of the "convex" hole is flush with the bottom edge of the square; the third layer is a total reflection plate 3. Structural diagram such as image 3 a, The absorber is a periodic structural unit, and the side length of a unit is 18mm. Such as image 3 b. The first layer is a "convex"-shaped hole structure, and the bottom of the "convex"-shaped l 1 =15mm, "convex" font top l 2 =7mm, the height of the "convex" font is 11mm: w=7mm, h=4mm; image 3 c, the side length of the square hole l 3 = 7 mm. Both layers of dielectric have the same thickness d 1 = d 2 =1.5mm, the material is FR4, the dielectric constant is 4.3, ...

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Abstract

The invention discloses a dielectric structure type multiband radar absorbing material based on a low dielectric constant material. The radar absorbing material is composed of a dielectric structure type metamaterial structure and a total reflection lining board substrate; the dielectric structure type metamaterial structure is composed of at least two layers of dielectric structures, the two layers of dielectric structures are made of the same low dielectric constant material and adopt different shape and size designs, and by means of the special structure design, the purpose of preparing the radar absorbing material with a multiband absorbing effect from the single low dielectric constant material is achieved. The radar absorbing material is simple in design, low in cost, high in operability and suitable for the fields of radar absorbing, electromagnetic shielding and the like, and due to the fact that the low dielectric material has high oxidation resistance and high corrosion resistance, the multiband radar absorbing material designed through the method can serve in complex environments such as ocean.

Description

technical field [0001] The invention relates to radar wave-absorbing materials, in particular to a dielectric structure multi-band radar wave-absorbing material prepared based on a single low-dielectric material, and belongs to the field of wave-absorbing functional materials. Background technique [0002] In recent years, with the rapid development of electromagnetic wave technology, its application in military and civilian fields has received extensive attention. Especially in the military field, radar detection technology, electromagnetic interference technology, electromagnetic suppression technology, etc. have become important means of competition between the enemy and us. At the same time, the research on electromagnetic wave absorbing materials has also made great progress. Since Landy first proposed the concept of a perfect absorber in 2008, domestic and foreign scholars have carried out a lot of research on metamaterial absorbers. Multi-frequency metamaterial abso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/00
Inventor 黄小忠王强王岩唐秀之杜作娟熊益军
Owner CENT SOUTH UNIV
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