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CN-224217707-U - Wave-absorbing material with multi-stage laminated cavity

CN224217707UCN 224217707 UCN224217707 UCN 224217707UCN-224217707-U

Abstract

The utility model relates to the technical field of wave-absorbing materials, in particular to a wave-absorbing material with a multistage laminated cavity, which comprises a first wave-absorbing layer, wherein a second wave-absorbing layer is fixedly arranged at the lower end of the first wave-absorbing layer, a third wave-absorbing layer is fixedly arranged at the lower end of the second wave-absorbing layer, and the first wave-absorbing layer comprises a first wave-absorbing plate and a first wave-absorbing cavity arranged on the front side surface of the first wave-absorbing plate. According to the utility model, through the three wave absorbing layers, the electromagnetic wave can be efficiently absorbed in a wider frequency range, the application requirements of different frequency bands, such as a radar frequency band from a low-frequency communication frequency band to a high-frequency communication frequency band, can be met, and the multi-stage laminated cavity structure enables the electromagnetic wave to undergo multiple reflection and absorption in the material, so that the electromagnetic wave energy absorption efficiency is greatly improved, and the intensity of reflected waves can be effectively reduced.

Inventors

  • CHEN XIANGJIAN
  • SONG TAOTAO

Assignees

  • 东莞市海兹鑫电子材料有限公司

Dates

Publication Date
20260508
Application Date
20250522

Claims (8)

  1. 1. The wave-absorbing material with the multi-level laminated cavity is characterized by comprising a first wave-absorbing layer (100), wherein a second wave-absorbing layer (200) is fixedly arranged at the lower end of the first wave-absorbing layer (100), and a third wave-absorbing layer (300) is fixedly arranged at the lower end of the second wave-absorbing layer (200); The first wave-absorbing layer (100) comprises a first wave-absorbing plate (101) and a first wave-absorbing cavity (102) arranged on the front side surface of the first wave-absorbing plate (101).
  2. 2. The wave absorbing material with multi-layered stacked cavities of claim 1, wherein said first wave absorbing plate (101) is made of a material having dielectric loss characteristics, i.e., carbon nanotube doped epoxy.
  3. 3. The wave absorbing material with multi-stage laminated cavities of claim 1, wherein the first wave absorbing cavity (102) penetrates through the front and rear surfaces of the first wave absorbing plate (101), and the cross section of the first wave absorbing cavity (102) is circular.
  4. 4. The wave-absorbing material with multi-layered stacked cavities of claim 1, wherein said second wave-absorbing layer (200) is formed by stacking a plurality of second wave-absorbing structures (201), each of said second wave-absorbing structures (201) comprising an upper wave-absorbing layer (202) and a lower wave-absorbing layer (203) attached to a lower surface of said upper wave-absorbing layer (202).
  5. 5. The wave absorbing material with multi-layered cavities of claim 4, wherein said upper wave absorbing layer (202) is made of nickel zinc ferrite with magnetic properties and said lower wave absorbing layer (203) is made of polytetrafluoroethylene with low dielectric constant.
  6. 6. The wave absorbing material with multi-layered stacked cavities of claim 1, wherein said third wave absorbing layer (300) comprises a third wave absorbing plate (301) and a plurality of third wave absorbing cavities (302) arranged on the front surface of said third wave absorbing plate (301).
  7. 7. The wave absorbing material with multi-layered cavities of claim 6, wherein the third wave absorbing plate (301) is made of a material with dielectric loss characteristics, namely graphene-doped epoxy resin.
  8. 8. The wave absorbing material with multi-stage laminated cavities of claim 6, wherein the third wave absorbing cavity (302) is similar in shape to the first wave absorbing cavity (102), and the third wave absorbing cavity (302) is larger in size than the first wave absorbing cavity (102).

Description

Wave-absorbing material with multi-stage laminated cavity Technical Field The utility model relates to the technical field of wave-absorbing materials, in particular to a wave-absorbing material with a multi-stage laminated cavity. Background The wave absorbing material is a functional material capable of absorbing and attenuating incident electromagnetic waves and converting the electromagnetic energy into heat energy or dissipating energy in other forms, the working principle is based on impedance matching and electromagnetic loss, the surface reflection is reduced by adjusting the dielectric constant and the magnetic permeability of the material, and the electromagnetic energy is converted into other energy by utilizing different loss mechanisms such as resistance type, dielectric type, magnetic medium type and the like. From the classification, the loss mechanism can be classified into a resistive type, a dielectric type, and a magnetic medium type, and the loss mechanism can be classified into a coating type, a patch type, and a structural type according to a molding process and an application form. The invention patent with the publication number of CN115679709A discloses a fiber wave-absorbing material, which comprises a fiber substrate layer and a wave-absorbing coating sprayed on the surface of the fiber substrate layer, wherein the fiber substrate layer is formed by weaving carbon fibers and starch/polyacrylonitrile blend fibers, the wave-absorbing coating is prepared from 100 parts by weight of adhesive, 8-15 parts by weight of wave-absorbing filler, 1-2 parts by weight of curing agent, 0.8-1.2 parts by weight of stabilizer and other additives, and the fiber wave-absorbing material prepared by the application has the advantages of light weight, wide frequency band, softness, bending resistance, good bonding stability of the wave-absorbing coating and the like, and has wide application range. Although the wave-absorbing material of the invention has the advantages of light weight, wide frequency band, softness, bending resistance, good bonding stability of the wave-absorbing coating, etc., in the practical use process, the wave-absorbing material formed by a single-layer structure has narrow wave-absorbing frequency band and limited wave-absorbing performance. To overcome the above situation, we propose a wave absorbing material with multi-layered stacked cavities. Disclosure of utility model The utility model provides a wave absorbing material with a multi-stage laminated cavity, which solves the problems in the background technology. In order to achieve the above purpose, the present utility model provides the following technical solutions: The wave-absorbing material with the multi-stage laminated cavity comprises a first wave-absorbing layer, wherein a second wave-absorbing layer is fixedly arranged at the lower end of the first wave-absorbing layer, and a third wave-absorbing layer is fixedly arranged at the lower end of the second wave-absorbing layer; The first wave-absorbing layer comprises a first wave-absorbing plate and a first wave-absorbing cavity arranged on the front side surface of the first wave-absorbing plate. As a preferable technical scheme, the first wave absorbing plate is made of a material with dielectric loss characteristics, namely, carbon nanotube doped epoxy resin. As an optimized technical scheme, the first wave-absorbing cavity penetrates through the front side and the rear side of the first wave-absorbing plate and is provided with two side surfaces, and the cross section of the first wave-absorbing cavity is circular. The two sets of arrangement, the existence of the first wave-absorbing cavity increases the propagation path and reflection times of the electromagnetic wave in the first wave-absorbing layer, and the low-frequency electromagnetic wave can be effectively absorbed by combining the dielectric loss of the first matrix. As the preferable technical scheme, the second wave-absorbing layer is formed by stacking a plurality of second wave-absorbing structures, and each second wave-absorbing structure comprises an upper wave-absorbing layer and a lower wave-absorbing layer attached to the lower surface of the upper wave-absorbing layer. As a preferable technical scheme, the upper wave-absorbing layer is made of nickel zinc ferrite with magnetism, and the lower wave-absorbing layer is made of polytetrafluoroethylene with low dielectric constant. The two sets can realize gradual absorption and attenuation of electromagnetic waves with different frequencies and widen wave absorption frequency bands by reasonably designing electromagnetic parameters and thicknesses of all layers As an optimized technical scheme, the third wave-absorbing layer comprises a third wave-absorbing plate and a plurality of third wave-absorbing cavities formed on the front side surface of the third wave-absorbing plate. As a preferable technical scheme, the third wave absorbing plate is m