CN213694716U

CN213694716U - Structure of biconical electromagnetic wave suppression sheet

Info

Publication number: CN213694716U
Application number: CN202022847004.7U
Authority: CN
Inventors: 王政华; 李新华; 梁邦芳
Original assignee: Shenzhen Feihongda Technology Co ltd
Current assignee: Shenzhen Feihongda Technology Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-07-13
Anticipated expiration: 2030-11-30

Abstract

The utility model discloses a structure of a biconical electromagnetic wave suppression sheet, which comprises a loss layer; the loss layer comprises a first conical body layer, an inverted second conical body layer and a wave guide layer, wherein the first conical body layer, the inverted second conical body layer and the wave guide layer are arranged on the front surface; the first conical body layer is connected with the second conical body layer; the wave guide layers are arranged on two sides of the connection position of the first conical body layer and the second conical body layer. The electromagnetic suppression sheet of the utility model has good wave absorption efficiency in high frequency band, which can reach more than 80 dB; because each conical body is composed of magnetic spheres with different particle diameters, the impedance matching of the wave-absorbing medium layer can be adjusted and controlled by adjusting the particle diameters of the magnetic spheres, and the prepared conical wave-absorbing material has good broadband wave-absorbing performance because the conical wave-absorbing material comprises a plurality of adjacent and repeatedly arranged conical parts and is added with wave-absorbing agent carbonyl iron powder with different particle diameters, and can realize good wave-absorbing performance in a broadband range from microwave to millimeter wave.

Description

Structure of biconical electromagnetic wave suppression sheet

Technical Field

The utility model relates to an electromagnetic wave suppression piece technical field, in particular to structure of bipyramid electromagnetic wave suppression piece.

Background

Along with the increase of the integration degree of electronic products, the electromagnetic wave interference between electronic devices is more and more obvious, the influence between the devices is avoided, and the simplest mode is to cut off the propagation path of the electromagnetic wave. The electromagnetic wave suppression sheet is the most commonly used product for avoiding the electromagnetic wave interference between devices in modern electronic products, and absorbs the interference waves emitted by the devices by utilizing the wave absorbing property of the wave absorbing material. Cutting off the electromagnetic propagation path from device to device.

The good performance source of the electric cone structure and the cone body reflect electromagnetic waves in multiple, when the electromagnetic waves are incident into the cone body, the edges of the cone body reflect the electromagnetic waves, the electromagnetic waves are repeatedly reflected among different cone bodies, and finally the electromagnetic waves are absorbed by the cone body; finally, the residual electromagnetic wave reaches the base of the cone, enters the cone after being reflected by the base, and finally only a small part of the residual electromagnetic wave is reflected out from the tip of the cone. Therefore, the absorption efficiency of the general cone structure is higher than that of other structures. Meanwhile, broadband absorption can be realized by modifying the material characteristics of the cone structure at different thicknesses.

At present, various structures are used for electromagnetic wave suppression sheets, such as a honeycomb structure, a multilayer structure, a mesh structure and the like, and chinese patent CN108084694A (a cone-shaped wave-absorbing material and a preparation method thereof) designs a single-layer cone-shaped structure, which well utilizes the suppression effect of the cone-shaped structure on electromagnetic waves, but does not well control the reflected waves of the cone-shaped body, and still a small amount of waves are not absorbed.

SUMMERY OF THE UTILITY MODEL

To the problem that prior art exists, the utility model provides a structure of bipyramid electromagnetic wave suppression piece.

In order to achieve the above purpose, the utility model discloses technical scheme as follows:

a structure of a biconical electromagnetic wave suppression sheet comprises a loss layer; the loss layer comprises a first conical body layer, an inverted second conical body layer and a wave guide layer, wherein the first conical body layer, the inverted second conical body layer and the wave guide layer are arranged on the front surface; the first conical body layer is connected with the second conical body layer; the wave guide layers are arranged on two sides of the connection position of the first conical body layer and the second conical body layer.

Preferably, the structure of the biconical electromagnetic wave suppression sheet further includes a first reflective layer and a second reflective layer; the first reflecting layer, the second reflecting layer and the loss layer are arranged from bottom to top.

Preferably, the wave guide layer is composed of a liquid curable resin or silicone oil.

Preferably, the first taper layer and the second taper layer are both made of magnetic materials.

Preferably, the magnetic material is composed of magnetic spheres with different particle diameters, and the particle diameter of the sphere at the bottom is larger than that of the sphere at the top.

Preferably, the material of the first reflective layer is copper.

Preferably, the second reflective layer is made of carbon.

Adopt the technical scheme of the utility model, following beneficial effect has: the utility model designs a multilayer electromagnetic wave suppression sheet which takes a biconical structure body as a main body, the wave absorption efficiency of the electromagnetic wave suppression sheet in a high frequency band is very good and can reach more than 80 dB; the prepared conical wave-absorbing material has good broadband wave-absorbing performance because the conical wave-absorbing material comprises a plurality of adjacent and repeatedly arranged conical pieces and wave-absorbing agent carbonyl iron powder with different particle sizes is added, the good wave-absorbing performance in a broadband range from microwaves to millimeter waves can be realized, the energy of electromagnetic waves can be converted into heat energy through multiple reflections among the wedges of the plurality of conical pieces and the wave-absorbing agent in the conical wave-absorbing material and consumed, and the conical wave-absorbing material has good wave-absorbing effect in a specific wave band.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the cone structure of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "is connected to" the second feature

"under" may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact, but being in contact with each other through additional features between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 to 2, the present invention provides a structure of a biconical electromagnetic wave suppression sheet, including a lossy layer 1; the loss layer 1 comprises a first conical body layer 103, an inverted second conical body layer 101 and a wave guide layer 102 which are arranged on the front surface; the first conical body layer 103 is connected with the second conical body layer 101; the wave guide layer 103 is arranged on two sides of the joint of the first conical body layer 103 and the second conical body layer 101.

The biconical electromagnetic wave suppression sheet further comprises a first reflecting layer 2 and a second reflecting layer 3; the first reflecting layer 2, the second reflecting layer 3 and the loss layer 1 are arranged from bottom to top.

The wave guide layer 103 is made of a liquid curable resin, such as: epoxy resin, acrylic resin or silicone oil.

The first reflecting layer 2 is made of metal copper; the second reflecting layer 3 is made of carbon.

Referring to fig. 2, the first taper body layer 103 and the second taper body layer 101 are both made of magnetic materials, which are composed of magnetic spheres having different particle diameters, the bottom sphere having a larger particle diameter, and the top sphere having a smaller particle diameter. The magnetic sphere can be made of magnetic materials such as wave absorbing agent carbonyl iron powder and ferrite.

The utility model discloses the theory of operation as follows:

external electromagnetic waves enter the structure through the connecting part between the first conical body layer 103 and the second conical body layer 101, and a part of the external electromagnetic waves are absorbed, and the transmission part is reflected and absorbed by the second conical body layer 101, and the reflected part is absorbed by the part on the first conical body layer 103, so as long as the electromagnetic waves entering the double-layer conical body are reflected back and forth on the double-layer conical body (even if some electromagnetic waves pass through the double-layer conical body, the electromagnetic waves are also reflected by the first reflecting layer 2, and after the electromagnetic waves are reflected by the second reflecting layer 3, the electromagnetic waves are absorbed by the first conical body layer 103 and the second conical body layer 101) and are finally and completely absorbed. And each conical body is composed of magnetic spheres with different particle diameters, and the impedance matching of the wave-absorbing medium layer can be adjusted and controlled by adjusting the particle diameters of the magnetic spheres. The prepared conical wave absorbing material has good broadband wave absorbing performance because the conical wave absorbing material comprises a plurality of adjacent and repeatedly arranged conical pieces and is added with wave absorbing agents with different particle sizes, can realize good wave absorbing performance in a broadband range from microwaves to millimeter waves, can convert the energy of electromagnetic waves into heat energy through multiple reflections among the wedges of the plurality of conical pieces and the wave absorbing agents therein to be consumed, and has good wave absorbing effect in a specific waveband.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. The structure of the biconical electromagnetic wave suppression sheet is characterized by comprising a loss layer; the loss layer comprises a first conical body layer, an inverted second conical body layer and a wave guide layer, wherein the first conical body layer, the inverted second conical body layer and the wave guide layer are arranged on the front surface; the first conical body layer is connected with the second conical body layer; the wave guide layers are arranged on two sides of the connection position of the first conical body layer and the second conical body layer.

2. The structure of a biconical electromagnetic wave suppression sheet according to claim 1, further comprising a first reflective layer, a second reflective layer; the first reflecting layer, the second reflecting layer and the loss layer are arranged from bottom to top.

3. The structure of a biconical electromagnetic wave suppression sheet according to claim 1, wherein the first taper layer and the second taper layer are each composed of a magnetic material.

4. The structure of a biconical electromagnetic wave suppression sheet according to claim 3, wherein the magnetic material is composed of magnetic spheres having different particle diameters, and the sphere particle diameter at the bottom is larger than the sphere particle diameter at the top.

5. The structure of a biconical electromagnetic wave suppression sheet according to claim 2, wherein a material of the first reflective layer is metallic copper.

6. The structure of a biconical electromagnetic wave suppression sheet according to claim 2, wherein the material of the second reflective layer is carbon.