Spiral conical wave-absorbing structure

Abstract

The utility model provides a spiral conical wave-absorbing structure, which relates to the technical field of wave-absorbing, and comprises a base, a plurality of cone bodies which rotate clockwise to rise or anticlockwise to rise are arranged on the base, and the cross section of each cone body is conical. The spiral conical wave-absorbing structure comprises the base and the cone, a plurality of cones rising in a clockwise rotating mode or in an anticlockwise rotating mode are connected to the base in an inserted mode, electromagnetic waves are propagated in the cones in a spiral mode, and the spiral structures of the cones increase the transmission distance of the electromagnetic waves in materials. The retention time of electromagnetic waves in the material is prolonged, and the loss capability of the material to the electromagnetic waves is improved, so that the wave absorbing performance of the material, especially the absorbing performance of a low-frequency part, is improved.

Description

Technical Field

[0001] This utility model belongs to the field of microwave absorbing technology, specifically relating to a spiral conical microwave absorbing structure. Background Technology

[0002] With the rapid development of modern electronic technology, electromagnetic radiation and interference problems have become increasingly prominent. In many fields such as military stealth, communication security and electromagnetic compatibility of electronic equipment, the demand for absorbing materials is extremely urgent.

[0003] Traditional microwave absorbing materials, such as metal-based and ferrite-based materials, have high density and high cost. In recent years, polymer foam materials have gained increasing attention in the microwave absorbing materials field due to their lightweight, relatively low cost, impact resistance, and good stability. However, conventionally shaped polymer foam absorbing materials cannot achieve sufficient energy dissipation within a short propagation path when faced with low-frequency electromagnetic waves. Achieving ideal absorption requires a larger volume or thickness, resulting in greater material usage, higher costs, and limitations in small-scale product design. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a spiral conical microwave absorbing structure to improve the overall performance of microwave absorbing materials in terms of cost and performance.

[0005] To achieve the above technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A spiral conical wave-absorbing structure includes a base and a cone. Multiple cones that rotate clockwise or counterclockwise are inserted into the base, and each cone has a conical cross-section.

[0007] Preferably, in the spiral conical wave-absorbing structure, the height of the cone is 100-1200mm.

[0008] Preferably, in the spiral conical wave-absorbing structure, the base is provided with multiple recesses, and the end of the cone near the base is provided with a protrusion that cooperates with the recesses. Each cone and the base are connected to form a combination, and the bottom of the combination is square with a side length of 200-800mm.

[0009] Preferably, in the spiral conical absorbing structure, the concave and convex blocks are both cubes with a height and side length of 20-300mm, and are interference fit after plug-in assembly.

[0010] Preferably, in the spiral conical microwave absorbing structure, both the base and the cone are integrally molded from a polymer and a microwave absorbing material through foaming. The polymer is selected from one of polypropylene, polystyrene, polyurethane, polylactic acid, polycarbonate, polyetheretherketone, polyethylene, polyvinyl chloride, polyimide, and phenolic resin.

[0011] Preferably, in the spiral conical absorbing structure, the absorbing material is selected from one of carbon black, graphite, graphene, carbon nanotubes, and metal powder.

[0012] Preferably, in the spiral conical absorbing structure, the spiral absorbing line of the cone is a spatial curve on the surface of the cone, and the pitch of the absorbing line on the surface of the cone is equal.

[0013] Preferably, in the spiral conical wave-absorbing structure, the outer contour of the cone shrinks proportionally from the end closest to the base to the end furthest from the base.

[0014] The beneficial effects of the technical solution provided by this utility model embodiment are:

[0015] The present invention discloses a spiral conical wave-absorbing structure, including a base on which multiple cones are arranged to rotate clockwise or counterclockwise. Electromagnetic waves propagate in a spiral shape within the cones. The spiral structure of the cones increases the transmission distance of electromagnetic waves within the material, prolongs the residence time of electromagnetic waves within the material, and improves the material's ability to dissipate electromagnetic waves, thereby improving the material's wave-absorbing performance, especially its absorption performance in the low-frequency range. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the spiral conical wave-absorbing structure of this utility model.

[0017] Figure 2 This is a front view of the spiral conical wave-absorbing structure of this utility model.

[0018] Figure 3 This is a diagram showing the propagation path of electromagnetic waves in the cone of this invention. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "inner" and "outer", "upper" and "lower", "front" and "back" is usually based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be 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 this utility model and are not intended to limit this utility model.

[0021] like Figures 1-2 A spiral conical wave-absorbing structure includes a base 1, on which a plurality of cones 2 are inserted, rotating clockwise or counterclockwise, and each cone 2 has a conical cross-section.

[0022] The height of the cone 2 is 100-1200mm; multiple recesses are provided on the base, and a protrusion that mates with the recesses is provided at one end of the cone near the base. Each cone 2 and base 1 are connected to form an assembly, the bottom of which is square with a side length of 200-800mm; the recesses and protrusions are cubes with a height and side length of 20-300mm, and are interference fit after insertion assembly; both the base 1 and cone 2 are integrally molded from polymer and microwave absorbing agent through foaming, and the polymer is selected from... One of polypropylene, polystyrene, polyurethane, polylactic acid, polycarbonate, polyetheretherketone, polyethylene, polyvinyl chloride, polyimide, and phenolic resin; the microwave absorbing material is selected from one of carbon black, graphite, graphene, carbon nanotubes, and metal powder; the spiral microwave absorbing line of the cone 2 is a spatial curve on the surface of the cone, and the pitch of the microwave absorbing line on the surface of the cone 2 is equal; the outer contour of the cone 2 shrinks proportionally from the end near the base 1 to the end away from the base 1; the spiral microwave absorbing line of the cone 2 follows the function of an equidistant conical spiral.

[0023] A microwave absorbing agent is added to the polymer. The microwave absorbing agent is selected from carbon black, graphite, graphene, carbon nanotubes, or metal powder. The cone is made of polymer foam particles and has the advantages of impact resistance, moisture resistance, strong chemical stability, good toughness, and long service life. The spiral cone structure of the cone reduces the overall weight and manufacturing cost. Moreover, this special structure increases the transmission distance of electromagnetic waves inside the material and prolongs the residence time of electromagnetic waves inside the material, thereby improving the material's ability to absorb electromagnetic waves and thus improving the material's microwave absorption performance, especially the absorption performance of the low-frequency part.

[0024] The preparation method of this utility model includes the following steps: Taking a 300mm spiral microwave absorbing material as an example, the polymer and microwave absorbing agent are first drawn and granulated by a twin-screw extruder, then foamed into foam particles by a high-pressure reactor, and finally formed into a base 1 and a cone 2 by a molding machine. The base 1 and the cone 2 are integrally formed, wherein the height of the base 2 is 60mm, the depth of the square concave block is 35mm, the side length is 50mm, the shape of the base is square, the side length is 600mm, the height of the cone 2 is 275mm, wherein the height of the square protrusion is 35mm, the side length is 50mm, and the maximum diameter of the upper cone is 100mm.

[0025] Figure 3 This is a diagram showing the propagation path of electromagnetic waves in the cone of this invention. Figure 3 As can be seen, electromagnetic waves propagate in a spiral shape within the cone. The structure of the cone in this invention increases the transmission distance of electromagnetic waves within the material, prolongs the residence time of electromagnetic waves within the material, and improves the material's ability to absorb electromagnetic waves, thereby enhancing the material's wave absorption performance, especially its absorption performance in the low-frequency range.

[0026] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A spiral conical wave-absorbing structure, characterized in that, It includes a base (1) and a cone (2), on which a plurality of cones (2) are inserted, which rotate clockwise or counterclockwise. The cross section of each cone (2) is conical.

2. The spiral conical wave-absorbing structure according to claim 1, characterized in that, The height of the cone (2) is 100-1200mm.

3. The spiral conical wave-absorbing structure according to claim 1, characterized in that, The base (1) is provided with a plurality of recesses (11), and the cone (2) is provided with a protrusion (21) that cooperates with the recesses (11) at one end near the base (1). Each cone (2) and the base (1) are connected to form a combination. The bottom shape of the combination is square and the side length is 200-800mm.

4. The spiral conical wave-absorbing structure according to claim 3, characterized in that, The concave block (11) and the convex block (21) are both cubes with a height and side length of 20-300mm, and are interference fit after being plugged in and assembled.

5. The spiral conical microwave absorbing structure according to claim 1, characterized in that, Both the base (1) and the cone (2) are integrally formed by foaming polymer and microwave absorbing material. The polymer is selected from one of polypropylene, polystyrene, polyurethane, polylactic acid, polycarbonate, polyether ether ketone, polyethylene, polyvinyl chloride, polyimide and phenolic resin.

6. The spiral conical microwave absorbing structure according to claim 5, characterized in that, The microwave absorbing material is selected from one of the following: carbon black, graphite, graphene, carbon nanotubes, and metal powder.

7. The spiral conical wave-absorbing structure according to claim 1, characterized in that, The helical absorption line of the cone (2) is a spatial curve on the surface of the cone, and the pitch of the absorption line on the surface of the cone (2) is equal.

8. The spiral conical microwave absorbing structure according to claim 7, characterized in that, The outer contour of the cone (2) shrinks proportionally from the end closest to the base (1) to the end furthest from the base (1).

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