CN111029789A - Wave-absorbing material with positive honeycomb structure of 10 degrees - Google Patents
Wave-absorbing material with positive honeycomb structure of 10 degrees Download PDFInfo
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- CN111029789A CN111029789A CN201911350591.4A CN201911350591A CN111029789A CN 111029789 A CN111029789 A CN 111029789A CN 201911350591 A CN201911350591 A CN 201911350591A CN 111029789 A CN111029789 A CN 111029789A
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- H05K9/00—Screening of apparatus or components against electric or magnetic fields
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- H—ELECTRICITY
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- H01Q—ANTENNAS, i.e. RADIO AERIALS
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- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/009—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive fibres, e.g. metal fibres, carbon fibres, metallised textile fibres, electro-conductive mesh, woven, non-woven mat, fleece, cross-linked
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Abstract
The application belongs to the technical field of stealth materials, and particularly relates to a positive honeycomb 10-degree structure wave-absorbing material, which comprises a plurality of layers stacked from top to bottom: the wave-transmitting layer is made of composite fiber materials and has a first preset size; the wave absorbing layer is made of magnetic micron line materials, is in a regular honeycomb structure with 10 degrees and has a second preset size; and the reflecting layer is made of metal and has a third preset size. The positive honeycomb 10-degree structure wave-absorbing material adopts a positive honeycomb wave-absorbing structure of an unconventional structure of a novel wave-absorbing medium, realizes impedance matching by increasing a wave-transmitting layer, reduces electromagnetic energy reflection, enables the structure to be sufficiently utilized to cause polarization and magnetization of incident electromagnetic waves, realizes a good absorption effect on 2GHz-18GHz electromagnetic waves by absorbing the loss effect of the medium, and achieves the effect of electromagnetic compatibility shielding or invisibility.
Description
Technical Field
The application belongs to the technical field of stealth materials, and particularly relates to a wave-absorbing material with a positive honeycomb 10-degree structure.
Background
At the present stage, the wave-absorbing material with the honeycomb structure adopts a positive honeycomb structure, the structure does not cause the maximum loss of incident electromagnetic waves, and the stealth property or the shielding property is limited. The traditional wave-absorbing material is deficient in anti-matching design, so that electromagnetic energy cannot completely enter the wave-absorbing medium, a large amount of electromagnetic energy is reflected, and the wave-absorbing performance of the wave-absorbing material is reduced. And the materials of the honeycomb structure are mostly conventional wave-absorbing materials such as carbon nano tubes or ferrite, and the like, although the process technology is mature, the materials also have corresponding defects, for example, the ferrite has the defects of high density, poor high-temperature property and the like, and the carbon nano tubes have certain toxicity to organisms and are limited in the application field.
Disclosure of Invention
In order to solve at least one of the technical problems, the application provides a wave-absorbing material with a positive honeycomb 10-degree structure.
The application discloses positive honeycomb 10 structure absorbing material, from top to bottom with this range upon range of:
the wave-transmitting layer is made of composite fiber materials and has a first preset size;
the wave absorbing layer is made of magnetic micron line materials, is in a regular honeycomb structure with 10 degrees and has a second preset size;
and the reflecting layer is made of metal and has a third preset size.
According to at least one embodiment of the present application, the composite fiber material of the wave-transmitting layer is a carbon fiber and glass fiber composite fiber mat containing 1% of carbon fibers.
According to at least one embodiment of the present application, the magnetic microwire material of the wave-absorbing layer is 30 wt% magnetic microwire.
According to at least one embodiment of the present application, the metal material of the reflective layer is an aluminum foil.
According to at least one embodiment of the application, the length, the width and the thickness of the wave-absorbing material with the positive honeycomb 10-degree structure are respectively 100mm, 100mm and 11 mm; wherein
The length, width and thickness of the wave-transparent layer in the first preset size are respectively 100mm, 100mm and 1 mm;
the length, width and thickness of the second preset size of the wave absorbing layer are respectively 100mm, 100mm and 9 mm;
the length, width and thickness dimensions of the third predetermined dimension of the reflective layer are 100mm, 1mm, respectively.
According to at least one embodiment of the application, in one structural unit of the wave-absorbing layer in the 10-degree structure of the regular honeycomb, the wall thickness is 0.8mm, and the side length of the inner wall is 4 mm.
The application has at least the following beneficial technical effects:
the positive honeycomb 10-degree structure wave-absorbing material adopts a positive honeycomb wave-absorbing structure of an unconventional structure of a novel wave-absorbing medium, realizes impedance matching by increasing a wave-transmitting layer, reduces electromagnetic energy reflection, enables the structure to be sufficiently utilized to cause polarization and magnetization of incident electromagnetic waves, realizes a good absorption effect on 2GHz-18GHz electromagnetic waves by absorbing the loss effect of the medium, and achieves the effect of electromagnetic compatibility shielding or invisibility.
Drawings
FIG. 1 is a schematic structural diagram of a three-layer structure laminated plate structure wave-absorbing material in a design stage of the application;
FIG. 2 is a comparison of wave absorption characteristics of different materials;
FIG. 3 is a 30 wt% magnetic microwire wave-absorbing characteristic;
FIG. 4 is a schematic structural diagram of a wave-absorbing material with a three-layer structure laminated plate structure according to the present application;
FIG. 5 is a schematic view of a 10 ° structure of a right honeycomb;
FIG. 6 shows wave-absorbing characteristics of the wave-absorbing material with the positive honeycomb 10-degree structure.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.
The positive honeycomb 10-degree structural wave-absorbing material of the present application is further described in detail with reference to the attached drawings 1-6.
Firstly, starting from the theory of electromagnetism, the influence of the dielectric constant and the magnetic permeability of the material on the loss characteristic of incident electromagnetic waves is analyzed, the dielectric constant and the magnetic permeability of different materials are combed, the loss tangent of different materials is compared, and a plurality of novel materials different from the traditional wave-absorbing medium are selected. The wave-absorbing material selected by the invention is as follows: 5 wt% of magnetic micron line, 30 wt% of magnetic micron line, spiral carbon fiber and chiral carbon fiber.
Further, verifying the loss performance of the selected novel materials to electromagnetic waves, designing a three-layer structure laminated board structure wave-absorbing material, as shown in fig. 1, wherein the first layer is a wave-transmitting layer with the size of 100mm × 100mm × 3.2mm, and the material is epoxy glass fiber reinforced plastic added with a certain amount of acetylene black; the second layer is a loss layer, the material is a wave-absorbing medium, and the size is 100mm multiplied by 3.2 mm; the third layer is a reflecting layer with the size of 100mm multiplied by 2mm and is made of aluminum foil.
Respectively setting wave-absorbing layer media as 4 selected novel wave-absorbing materials, calculating and evaluating wave-absorbing characteristics of the materials through a time domain finite integration algorithm, measuring the wave-absorbing characteristics of the wave-absorbing materials by using a parameter radar scattering cross section (RCS) for measuring the stealth characteristics of a target, and comparing the wave-absorbing characteristics of the 4 selected novel wave-absorbing materials with that of 3 traditional wave-absorbing materials as shown in figure 2. Through comparative analysis, 30 wt% of magnetic micron lines are selected as the wave-absorbing medium adopted by the wave-absorbing material with the honeycomb structure designed by the invention, and the wave-absorbing property is shown in figure 3.
In conclusion, the application discloses a positive honeycomb 10-degree structure wave-absorbing material, which comprises a wave-transmitting layer, a wave-absorbing layer and a reflecting layer which are stacked from top to bottom.
The wave-transmitting layer is made of composite fiber materials and has a first preset size; in this embodiment, the preferred material is a carbon fiber-glass fiber composite fiber mat containing 1% carbon fiber.
The wave absorbing layer is made of magnetic micron line materials, is in a regular honeycomb 10-degree structure (shown in figure 5), and has a second preset size; in this embodiment, the preferred positive honeycomb 10 ° structure material is 30 wt% magnetic microwire.
The reflecting layer is made of metal and has a third preset size; in this embodiment, the metal material is preferably an aluminum foil.
Further, different thicknesses, inner wall side lengths, wall thicknesses and inner diameters of the wave-absorbing layer honeycomb structure are set, and the loss effect of the wave-absorbing layer honeycomb structure on electromagnetic energy is evaluated. By changing the thickness of the wave absorbing layer and the wave transmitting layer, the impedance matching between the two layers is realized, and electromagnetic energy effectively enters the wave absorbing layer to be lost and absorbed. And settling the wave-absorbing characteristics of the wave-absorbing materials with different structures by adopting a time domain finite integration algorithm, and then designing the wave-absorbing material with the honeycomb structure with the optimal wave-absorbing performance by comparison and analysis.
And finally, according to the analysis of the application field requirements, setting the design target within 15mm of thickness. For this reason, the size (length, width and thickness) of the invisible skin with the positive honeycomb structure of 10 degrees is designed to be 100mm multiplied by 11mm, and the invisible skin is composed of three layers of a wave-transmitting layer, a wave-absorbing layer and a reflecting layer. The wave-transmitting layer has the size of 100mm multiplied by 1 mm; the wave absorbing layer has the size of 100mm multiplied by 9mm, and in a structure with 10 degrees of a regular honeycomb (as shown in figure 5), the wall thickness is 0.8mm, and the side length of the inner wall is 4 mm; the reflective layer has dimensions of 100mm × 100mm × 1 mm.
Finally, the wave absorbing property is shown in fig. 6, and the incident electromagnetic wave can be effectively subjected to loss absorption.
To sum up, the positive honeycomb 10 structure absorbing material of this application adopts the positive honeycomb wave-absorbing structure of the unconventional structure of novel ripples medium of inhaling, realizes impedance matching through increasing the wave-transparent layer, reduces the electromagnetic energy reflection, utilizes the structure to arouse incident electromagnetic wave polarization and magnetization again, through the effect of absorbing the loss of wave medium, realizes the good absorption effect to 2GHz-18GHz electromagnetic wave, reaches the effect of electromagnetic compatibility shielding or stealthy.
Compared with the traditional wave-absorbing material, the positive honeycomb 10-degree structure designed by the invention has better mechanical property and can bear load, the honeycomb structure can effectively reduce the structural weight, the cost can be saved by saving the material, and the special positive honeycomb 10-degree structure and the magnetic micron line have stronger wave-absorbing capacity and wide application prospect.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (6)
1. A positive honeycomb 10-degree structure wave-absorbing material is characterized by comprising the following layers from top to bottom:
the wave-transmitting layer is made of composite fiber materials and has a first preset size;
the wave absorbing layer is made of magnetic micron line materials, is in a regular honeycomb structure with 10 degrees and has a second preset size;
and the reflecting layer is made of metal and has a third preset size.
2. The wave absorbing material with the regular honeycomb 10-degree structure of claim 1, wherein the composite fiber material of the wave-transparent layer is a carbon fiber and glass fiber composite fiber felt containing 1% of carbon fibers.
3. The wave-absorbing material with the positive honeycomb 10-degree structure of claim 2, wherein the magnetic microwire material of the wave-absorbing layer is 30 wt% of magnetic microwire.
4. The wave absorbing material with the positive honeycomb 10 ° structure of claim 3, wherein the metal material of the reflecting layer is aluminum foil.
5. The wave-absorbing material with the positive honeycomb 10-degree structure of claim 4, wherein the wave-absorbing material with the positive honeycomb 10-degree structure has the length, width and thickness dimensions of 100mm, 100mm and 11mm respectively; wherein
The length, width and thickness of the wave-transparent layer in the first preset size are respectively 100mm, 100mm and 1 mm;
the length, width and thickness of the second preset size of the wave absorbing layer are respectively 100mm, 100mm and 9 mm;
the length, width and thickness dimensions of the third predetermined dimension of the reflective layer are 100mm, 1mm, respectively.
6. The wave-absorbing material with the positive honeycomb 10-degree structure of claim 5, wherein in one structural unit of the positive honeycomb 10-degree structure of the wave-absorbing layer, the wall thickness is 0.8mm, and the side length of the inner wall is 4 mm.
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Cited By (6)
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| CN111525256A (en) * | 2020-04-30 | 2020-08-11 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Heterogeneous conformal low-RCS airborne radome |
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| CN112151351A (en) * | 2020-11-24 | 2020-12-29 | 季华实验室 | Structure for inhibiting electromagnetic interference and wave leakage, radio frequency power supply and plasma etching equipment |
| CN113239419A (en) * | 2021-04-14 | 2021-08-10 | 哈尔滨工业大学 | Design method of honeycomb structure tunable super surface based on thickness and size change |
| CN113418859A (en) * | 2021-06-18 | 2021-09-21 | 北京卫星环境工程研究所 | Two-dimensional sample switching system |
| CN114256632A (en) * | 2021-12-24 | 2022-03-29 | 中国人民解放军空军工程大学 | Novel honeycomb wave-absorbing composite structure based on inductively coupled plasma |
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| CN111981907A (en) * | 2020-09-09 | 2020-11-24 | 上海无线电设备研究所 | Preparation method of wave-absorbing skin |
| CN112151351A (en) * | 2020-11-24 | 2020-12-29 | 季华实验室 | Structure for inhibiting electromagnetic interference and wave leakage, radio frequency power supply and plasma etching equipment |
| CN113239419A (en) * | 2021-04-14 | 2021-08-10 | 哈尔滨工业大学 | Design method of honeycomb structure tunable super surface based on thickness and size change |
| CN113418859A (en) * | 2021-06-18 | 2021-09-21 | 北京卫星环境工程研究所 | Two-dimensional sample switching system |
| CN114256632A (en) * | 2021-12-24 | 2022-03-29 | 中国人民解放军空军工程大学 | Novel honeycomb wave-absorbing composite structure based on inductively coupled plasma |
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