Array unit metamaterial wave-absorbing structure

Abstract

The utility model provides an array unit metamaterial wave-absorbing structure, which belongs to the technical field of stealth materials and comprises a substrate layer and a surface layer arranged on one end face of the substrate layer, the surface layer comprises a plurality of array units which are distributed on the substrate layer at equal intervals and are identical in size and configuration, and the array units are arranged in an array mode. An outer surface layer is arranged on the surface, far away from the substrate layer, of the surface layer, and an inner surface layer is arranged on the surface, far away from the surface layer, of the substrate layer. The array unit metamaterial wave-absorbing structure has the advantages of being wide in frequency band, light in weight, thin in size and high in strength, the conductive foaming polypropylene beads are integrally formed in a compression molding mode, the overall mass can be greatly reduced, the frequency band of radar waves capable of being absorbed by the array unit on the surface layer is wider, and therefore the stealth effect is enhanced, and the overall size is small.

Description

Technical Field

[0001] The utility model belongs to the technical field of stealth materials, and in particular relates to an array unit metamaterial wave absorbing structure. Background Art

[0002] With the rapid development of the defense industry, the research and development of stealth material technology has become a global research and development focus. The advancement of modern offensive weapons, particularly precision strike weapons, has posed a significant threat to the survivability of weaponry. Simply relying on enhanced weapon protection is no longer practical. Stealth technology can be employed to render enemy detection, guidance, and reconnaissance systems ineffective, minimizing the need for concealment and seizing the initiative on the battlefield. Preemptively detecting and eliminating the enemy has become a key development direction in modern weapon protection. In military applications, it is widely believed that the application of super-absorbent material structures to military equipment is like applying an "invisibility cloak," significantly enhancing the equipment's stealth performance.

[0003] Existing stealth technology typically involves applying a stealth coating to a surface, which reduces or absorbs reflected radar waves, making it difficult for targets to be detected. This novel super-absorbent material technology can replace traditional stealth coatings and is suitable for applications in warships, tanks, missiles, and other fields. As a high-tech military technology, super-absorbent materials, still have some drawbacks due to their early stages of development, such as high overall mass, thickness, and insufficient strength. Given these limitations, we propose an array-unit metamaterial absorbing structure to address these issues. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an array unit metamaterial absorbing structure with the advantages of reasonable structure, strong practicality, wide bandwidth, light weight, thin size and high strength.

[0005] In order to achieve the above technical objectives, the technical solution adopted by this utility model is:

[0006] An array unit metamaterial absorbing structure includes a base layer and a surface layer arranged on one end surface of the base layer. The surface layer includes a plurality of array units of the same size and configuration distributed equidistantly on the base layer. The plurality of array units are arranged in an array manner so as to maintain the same predetermined spacing between each other. An outer surface layer is provided on a side of the surface layer away from the base layer, and an inner surface layer is provided on a side of the base layer away from the surface layer.

[0007] Preferably, the array unit metamaterial absorbing structure, wherein the configuration of the array unit is rectangular, and each array unit includes four rectangular bosses, the length of the rectangular bosses is 14±0.2 mm, the width is 14±0.2 mm, the thickness is 1.5±0.2 mm, and the interval between adjacent array units is 2±0.2 mm.

[0008] Preferably, in the array unit metamaterial absorbing structure, there is a gap between adjacent rectangular bosses, and the gap forms a cross-shaped concave groove.

[0009] Preferably, in the array unit metamaterial absorbing structure, the array unit is a mastoid structure with a diameter of 10±0.2 mm and a thickness of 1.5±0.2 mm, and the gap between adjacent mastoid structures is 2±0.2 mm.

[0010] Preferably, in the array unit metamaterial absorbing structure, the base layer and the surface layer are made of a conductive material, and the conductive material is polypropylene.

[0011] Preferably, in the array unit metamaterial absorbing structure, the outer layer is made of aramid fiber cloth, and the thickness of the outer layer is 0.2-6 mm.

[0012] Preferably, in the array unit metamaterial absorbing structure, the material of the inner surface layer is an aluminum plate, and the thickness of the inner surface layer is 0.5-2 mm.

[0013] Preferably, the array unit metamaterial absorbing structure has a thickness of 10-30 mm.

[0014] Preferably, in the array unit metamaterial absorbing structure, the thickness of the base layer is 15-28 mm.

[0015] The beneficial effects of the technical solution provided by the embodiment of the utility model are:

[0016] The array unit metamaterial absorbing structure of the utility model has the advantages of wide bandwidth, light weight, thin size and high strength. It adopts conductive foamed polypropylene beads as one-piece molding, which can greatly reduce the overall mass. The array unit of the surface layer can absorb a wider frequency band of radar waves, thereby enhancing the stealth effect and the overall size is thin. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the metamaterial absorbing structure of the array unit of the utility model.

[0018] Figure 2 It is a side view of the metamaterial absorbing structure of the array unit of the utility model.

[0019] Figure 3 It is a three-dimensional diagram of the metamaterial absorbing structure of the array unit of the utility model.

[0020] Figure 4 This utility model Figure 1 Enlarged structural diagram.

[0021] Explanation of reference numerals: 1-base layer, 2-surface layer, 3-array unit, 4-outer surface layer, 5-inner surface layer, 6-cross-shaped recessed groove. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "inside, outside", "up, down", "front, back", etc. are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] like Figure 1-4 An array unit metamaterial absorbing structure includes a base layer 1 and a surface layer 2 arranged on one end surface of the base layer 1. The surface layer 2 includes a plurality of array units 3 of the same size and configuration distributed equidistantly on the base layer 1. The plurality of array units 3 are arranged in an array manner so as to maintain the same predetermined interval between each other. An outer layer 4 is provided on the side of the surface layer 2 away from the base layer 1, and an inner layer 5 is provided on the side of the base layer 1 away from the surface layer 2.

[0025] The array unit 3 is configured as a rectangle, and each array unit 3 includes four rectangular bosses, the length of the rectangular bosses is 14±0.2mm, the width is 14±0.2mm, the thickness is 1.5±0.2mm, and the spacing between adjacent array units 3 is 2±0.2mm; there is a gap between adjacent rectangular bosses, and the gap forms a cross-shaped recessed groove 6; the array unit 3 is a papillary structure with a diameter of 10±0.2mm and a thickness of 1.5±0.2mm, the gap between adjacent papillary structures is 2±0.2mm, and the thickness of the base layer 1 is 15-28mm.

[0026] The base layer 1 and the surface layer 2 are made of a conductive material, which is polypropylene. The base layer 1 and the surface layer 2 are integrally molded from conductive foamed polypropylene particles, and the foamed polypropylene stealth absorbing material with a thickness not exceeding 30 mm is manufactured using the principle of multiple reflections of electromagnetic waves.

[0027] The outer surface layer 4 is made of aramid fiber cloth, and the thickness of the outer surface layer 4 is 0.2-6 mm; the inner surface layer 5 is made of aluminum plate, and the thickness of the inner surface layer 5 is 0.5-2 mm; the thickness of the array unit metamaterial absorbing structure is 10-30 mm.

[0028] The aluminum plate has a certain hardness that can enhance the overall strength of the device. The foamed polypropylene has the advantages of being lightweight, having controllable density, and having high processing precision, which makes it an advantage in being developed as a stealth material. The conductive polymer foamed polypropylene particles are molded to produce a stealth material with a thickness of no more than 30mm and a raised structure on the surface to achieve broadband, lightweight, thin size, and high strength. The thickness of the base layer 1 is 15-28mm.

[0029] Example 1

[0030] Conductive foamed polypropylene particles are selected and molded into array units 3 with a surface of 14mm×14mm×1.5mm and a gap of 2mm, or array units 3 with a diameter of 10mm, a depth of 1.5mm and a mastoid structure with a gap of 2mm. The base layer 1 is a 15-28mm foamed polypropylene absorbing material, and the surface of the absorbing material is smoothed with an adhesive. The outer layer 4 is made of 0.3mm thick aramid fiber cloth, and vacuum bonding technology is used to make the outer layer 4 completely fit the array unit 3. The inner layer 5 is made of 0.5mm thick aluminum plate to be composited as a whole to form a lightweight, broadband, thin and high-strength stealth material.

[0031] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to examples, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An array unit metamaterial absorbing structure, characterized in that: The invention comprises a base layer (1) and a surface layer (2) arranged on one end face of the base layer (1), wherein the surface layer (2) comprises a plurality of array units (3) of the same size and configuration distributed equidistantly on the base layer (1), wherein the plurality of array units (3) are arranged in an array manner so as to maintain a same predetermined interval between each other, an outer surface layer (4) is arranged on a side of the surface layer (2) away from the base layer (1), and an inner surface layer (5) is arranged on a side of the base layer (1) away from the surface layer (2).

2. The array unit metamaterial absorbing structure according to claim 1, characterized in that: The array unit (3) is rectangular in shape, and each array unit (3) comprises four rectangular bosses, each of which has a length of 14±0.2 mm, a width of 14±0.2 mm, and a thickness of 1.5±0.2 mm, and a spacing of 2±0.2 mm between adjacent array units (3).

3. The array unit metamaterial absorbing structure according to claim 2, characterized in that: There is a gap between adjacent rectangular bosses, and the gap forms a cross-shaped recessed groove (6).

4. The array unit metamaterial absorbing structure according to claim 1, characterized in that: The array unit (3) is a mastoid structure with a diameter of 10±0.2 mm and a thickness of 1.5±0.2 mm, and the gap between adjacent mastoid structures is 2±0.2 mm.

5. The array unit metamaterial absorbing structure according to claim 1, characterized in that: The base layer (1) and the surface layer (2) are made of a conductive material, and the conductive material is polypropylene.

6. The array unit metamaterial absorbing structure according to claim 1, characterized in that: The outer layer (4) is made of aramid fiber cloth, and the thickness of the outer layer (4) is 0.2-6 mm.

7. The array unit metamaterial absorbing structure according to claim 1, characterized in that: The material of the inner surface layer (5) is an aluminum plate, and the thickness of the inner surface layer (5) is 0.5-2 mm.

8. The array unit metamaterial absorbing structure according to claim 1, characterized in that: The thickness of the array unit metamaterial absorbing structure is 10-30 mm.

9. The array unit metamaterial absorbing structure according to claim 1, characterized in that: The thickness of the base layer (1) is 15-28 mm.

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