Broadband radar wave stealth composite material structure
By designing a composite material structure with multiple radar wave absorption and reflection layers, the problems of existing stealth coatings being unable to meet broadband stealth requirements and being prone to peeling have been solved. This has enabled effective absorption and reflection of broadband radar waves, enhancing the stealth and mechanical properties of the material.
Patent Information
- Application Number
- CN202423290003.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing stealth coatings cannot meet the stealth requirements of modern aircraft for wide-band radar waves, and are prone to peeling off under conditions of high shear force, high temperature, and high humidity, resulting in a decrease in stealth performance.
A broadband radar wave stealth composite material structure is designed, including high-frequency, mid-frequency, and low-frequency radar wave absorbing layers and reflective layers. By coating multiple layers of quartz fiber cloth with radar-absorbing material and curing them, multiple absorption and reflection of radar waves are achieved, forming a structure with integrated functions.
It achieves effective absorption and reflection of radar waves in the frequency range of 1 to 18 GHz, improves stealth performance, enhances the mechanical properties of materials, and avoids coating peeling.
Smart Images
Figure CN223564847U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to functional material technical field, especially relates to a wide frequency band radar wave stealth composite material structure. BACKGROUND
[0002] Radar wave stealth is that the stealth material on the surface of the aircraft converts the electromagnetic wave emitted by the radar into heat or other forms of energy and releases them, so as to realize the purpose of aircraft stealth. The working frequency interval of most aviation or marine radars is L band to Ku band, corresponding to the frequency interval of 1-18GHz, and the conventional stealth paint generally has better stealth performance in the 4-8GHz or 8-12GHz frequency band, so the conventional stealth paint cannot meet the requirements of modern aircraft on wide frequency band radar wave stealth.
[0003] The stealth of the aircraft to the radar is realized by coating the stealth coating on the outer surface of the aircraft structure, and the stealth coating material is adhered to the outer surface of the aircraft by adhesion, and the stealth coating is easy to fall off under the service load of high shear force, high temperature and high humidity, which greatly reduces the stealth performance of the aircraft.
[0004] Therefore, it is necessary to develop a stealth material which can meet the requirements of wide frequency band radar wave stealth and can be integrally formed with the aircraft parts. UTILITY MODEL CONTENTS
[0005] The utility model discloses a wide frequency band radar wave stealth composite material structure which overcomes the defects in the prior art.
[0006] The utility model provides a kind of wide frequency band radar wave stealth composite material structure, with aircraft conformal to absorb or convert electromagnetic wave emitted by radar, including from top to bottom in turn high frequency band radar wave absorption layer, middle frequency band radar wave absorption layer, low frequency band radar wave absorption layer, radar wave reflection layer, high frequency band radar wave absorption layer, middle frequency band radar wave absorption layer, low frequency band radar wave absorption layer, radar wave reflection layer are cured and formed in turn;
[0007] The high frequency band radar wave absorption layer is used to absorb radar waves with a frequency between 12.5GHz and 18GHz.
[0008] The middle frequency band radar wave absorption layer is used to absorb radar waves with a frequency between 4GHz and 12.5GHz.
[0009] The low frequency band radar wave absorption layer is used to absorb radar waves with a frequency between 1GHz and 4GHz.
[0010] The radar wave reflection layer is used to reflect the remaining wide frequency radar waves after absorption.
[0011] Further, the high-frequency radar wave absorbing layer comprises a plurality of first base layers and a first functional layer coated on the first base layers, and the first base layers are cured and formed.
[0012] Further, the first base layer is a quartz fiber cloth with a thickness of 0.2 mm, and the high-frequency radar wave absorbing layer has a thickness of 1.6-2.0 mm.
[0013] Further, the first functional layer is a ferrite paint or a carbon nanotube composite paint.
[0014] Further, the medium-frequency radar wave absorbing layer comprises a plurality of second base layers and a second functional layer coated on the second base layers, and the second base layers are cured and formed.
[0015] Further, the second base layer is a quartz fiber cloth with a thickness of 0.2 mm, and the medium-frequency radar wave absorbing layer has a thickness of 1.4-1.8 mm.
[0016] Further, the second functional layer is a magnetic metal powder composite paint or a ceramic-based composite paint.
[0017] Further, the low-frequency radar wave absorbing layer comprises a plurality of third base layers and a third functional layer coated on the third base layers, and the third base layers are cured and formed.
[0018] Further, the third base layer is a quartz fiber cloth with a thickness of 0.2 mm, and the high-frequency radar wave absorbing layer has a thickness of 0.4-0.8 mm.
[0019] Further, the third functional layer is a ferromagnetic sheet material paint or a conductive polymer paint.
[0020] Compared with the prior art, the beneficial effects of the utility model are that:
[0021] The utility model discloses an absorbing layer and a reflecting layer, and the wideband radar wave is absorbed after passing through different absorbing layers, and the remaining radar wave is reflected by the reflecting layer and then enters the absorbing layer again, thereby realizing secondary effective absorption of the wideband radar wave and guaranteeing the stealth effect.
[0022] The utility model evenly coats the wave-absorbing material on the quartz fiber cloth, and replaces the stealth coating by curing and forming the multiple quartz fiber cloths to realize structural function integration, and besides excellent stealth performance, the utility model also has excellent mechanical properties. DRAWINGS
[0023] The following drawings only schematically illustrate and explain the utility model, and are not used for limiting the range of the utility model, wherein:
[0024] Figure 1 : the layer structure schematic view of the utility model;
[0025] Figure 2 : low frequency band radar wave absorption layer structure schematic view;
[0026] Figure 3 : middle frequency band radar wave absorption layer structure schematic view;
[0027] Figure 4 : high frequency band radar wave absorption layer structure schematic view;
[0028] In the drawing: 1, low frequency band radar wave absorption layer;2, middle frequency band radar wave absorption layer;3, high frequency band radar wave absorption layer;4, radar wave reflection layer;5, first base layer;6, first functional layer;7, second base layer;8, second functional layer;9, third base layer;10, third functional layer. DETAILED DESCRIPTION
[0029] In order to make the utility model's purpose, technical scheme, design method and advantage more clear and obvious, the following is further detailed to the utility model through specific embodiment by the accompanying drawings.It should be understood that the specific embodiment described here is only for explaining the utility model, and is not for limiting the utility model.
[0030] As Figure 1 Indicated, the utility model provides a kind of wide frequency band radar wave stealth composite material structure, with aircraft conformal to absorb or convert electromagnetic wave that radar emits, including from top to bottom sequentially high frequency band radar wave absorption layer 3, middle frequency band radar wave absorption layer 2, low frequency band radar wave absorption layer 1, radar wave reflection layer 4, high frequency band radar wave absorption layer 3, middle frequency band radar wave absorption layer 2, low frequency band radar wave absorption layer 1, radar wave reflection layer 4 are sequentially cured and formed;High frequency band radar wave absorption layer 3 is used to absorb the radar wave between 12.5~18GHz;Middle frequency band radar wave absorption layer 2 is used to absorb the radar wave between 4~12.5GHz;Low frequency band radar wave absorption layer 1 is used to absorb the radar wave between 1~4GHz;Radar wave reflection layer 4 is used to reflect the remaining wide frequency radar wave after being absorbed.Through three layers of absorption layer, 1~18GHz radar wave is absorbed, and the radar wave that is not absorbed is reflected to three absorption layers by radar wave reflection layer 4 and is absorbed second time, guarantees stealth effect.In the embodiment, radar wave reflection layer 4 selects 1mm thick carbon fiber reinforced epoxy resin matrix composite material.
[0031] As Figure 2As shown in the drawings, the high-frequency radar wave absorbing layer 3 comprises a plurality of layers of first base layers 5 and a first functional layer 6 coated on the first base layers 5, and the plurality of layers of the first base layers 5 are cured and formed. The first base layer 5 is a quartz fiber cloth with a thickness of 0.2mm, the thickness of the high-frequency radar wave absorbing layer 3 is 1.6-2.0mm, and the first functional layer 6 is selected from common absorbing materials for high-frequency radar waves, such as ferrite paint or carbon nanotube composite paint.
[0032] As shown in the drawings, Figure 3 The medium-frequency radar wave absorbing layer 2 comprises a plurality of layers of second base layers 7 and a second functional layer 8 coated on the second base layers 7, and the plurality of layers of the second base layers 7 are cured and formed. The second base layer 7 is a quartz fiber cloth with a thickness of 0.2mm, the thickness of the medium-frequency radar wave absorbing layer 2 is 1.4-1.8mm. The second functional layer 8 is selected from common absorbing materials for medium-frequency radar waves, such as magnetic metal powder composite paint or ceramic-based composite paint.
[0033] As shown in the drawings, Figure 4 The low-frequency radar wave absorbing layer 1 comprises a plurality of layers of third base layers 9 and a third functional layer 10 coated on the third base layers 9, and the plurality of layers of the third base layers 9 are cured and formed. The third base layer 9 is a quartz fiber cloth with a thickness of 0.2mm, and the thickness of the high-frequency radar wave absorbing layer 3 is 0.4-0.8mm. The third functional layer 10 is selected from common absorbing materials for low-frequency radar waves, such as ferromagnetic sheet material paint or conductive polymer paint.
[0034] In the embodiment, the high-frequency radar wave absorbing layer 3, the medium-frequency radar wave absorbing layer 2 and the low-frequency radar wave absorbing layer 1 are all cured and formed by coating absorbing materials on different layers of quartz fiber cloth, and then the high-frequency radar wave absorbing layer 3, the medium-frequency radar wave absorbing layer 2, the low-frequency radar wave absorbing layer 1 and the radar wave reflecting layer 4 are sequentially cured and formed, so as to replace the existing stealth coating to realize the structural function integration, and in addition to the excellent stealth performance, the excellent mechanical properties are also achieved. The cured and formed stealth composite structure is conformal to the aircraft, which can effectively improve the service load of the stealth composite structure and avoid the falling of the stealth material.
[0035] The above has described the embodiments of the utility model, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles, practical applications or technical improvements in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the disclosed embodiments.
Claims
1. A broadband radar wave stealth composite structure conformal to an aircraft to absorb or transform electromagnetic waves emitted by a radar, characterized in that, The radar wave absorbing layer comprises, from top to bottom, a high-frequency radar wave absorbing layer (3), a medium-frequency radar wave absorbing layer (2), a low-frequency radar wave absorbing layer (1), and a radar wave reflecting layer (4), which are sequentially cured and formed. The high-frequency radar wave absorbing layer (3) is used for absorbing radar waves with a frequency of 12.5-18 GHz. The medium-frequency radar wave absorbing layer (2) is used for absorbing radar waves with a frequency of 4-12.5 GHz. The low-frequency radar wave absorbing layer (1) is used for absorbing radar waves with a frequency of 1-4 GHz. The radar wave reflecting layer (4) is used for reflecting the remaining wide-band radar waves after absorption.
2. The radar wave invisibility composite structure of claim 1, wherein, The high-frequency radar wave absorbing layer (3) comprises a plurality of first base layers (5) and a first functional layer (6) coated on the first base layers (5), and the first base layers (5) are cured and formed.
3. The radar wave broadband invisibility composite structure according to claim 2, wherein, The first base layer (5) is a quartz fiber cloth with a thickness of 0.2 mm, and the high-frequency radar wave absorbing layer (3) has a thickness of 1.6-2.0 mm.
4. The radar wave broadband invisibility composite structure according to claim 3, wherein, The first functional layer (6) is a ferrite paint or a carbon nanotube composite paint.
5. The radar wave invisibility composite structure of claim 1, wherein, The medium-frequency radar wave absorbing layer (2) comprises a plurality of second base layers (7) and a second functional layer (8) coated on the second base layers (7), and the second base layers (7) are cured and formed.
6. The radar wave broadband invisibility composite structure according to claim 5, wherein, The second base layer (7) is a quartz fiber cloth with a thickness of 0.2 mm, and the medium-frequency radar wave absorbing layer (2) has a thickness of 1.4-1.8 mm.
7. The radar wave broadband invisibility composite structure according to claim 6, wherein, The second functional layer (8) is a magnetic metal powder composite paint or a ceramic-based composite paint.
8. The radar wave broadband invisibility composite structure of claim 1, wherein, The low-frequency radar wave absorbing layer (1) comprises a plurality of third base layers (9) and a third functional layer (10) coated on the third base layers (9), and the third base layers (9) are cured and formed.
9. The radar wave broadband invisibility composite structure according to claim 8, wherein, The third base layer (9) is a quartz fiber cloth with a thickness of 0.2 mm, and the high-frequency radar wave absorbing layer (3) has a thickness of 0.4-0.8 mm.
10. The radar wave broadband invisibility composite structure according to claim 9, wherein, The third functional layer (10) is a ferromagnetic sheet material paint or a conductive polymer paint.