CN215991800U - Electromagnetic shielding structure and electromagnetic shielding body - Google Patents
Electromagnetic shielding structure and electromagnetic shielding body Download PDFInfo
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- CN215991800U CN215991800U CN202121550580.3U CN202121550580U CN215991800U CN 215991800 U CN215991800 U CN 215991800U CN 202121550580 U CN202121550580 U CN 202121550580U CN 215991800 U CN215991800 U CN 215991800U
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Abstract
The utility model provides an electromagnetic shielding structure and an electromagnetic shielding body, wherein the electromagnetic shielding structure comprises a supporting body, the outer side surface of the supporting body is provided with an electromagnetic absorption layer, the electromagnetic absorption layer comprises one or more of a ferrite layer, a carbon fiber layer, a carbon powder mixing layer and an iron powder layer, and the electromagnetic absorption layers are stacked along the direction far away from the outer side surface of the supporting body. The electromagnetic shielding body is provided with the electromagnetic shielding structure. The utility model has the beneficial effects that: the electromagnetic absorption layer can be adjusted according to the requirement, is easy to move and has portability.
Description
Technical Field
The utility model relates to the technical field of electromagnetic shielding, in particular to an electromagnetic shielding structure and an electromagnetic shielding body.
Background
Millimeter wave communication is one of the key technologies of 5G. Due to the characteristics that millimeter waves have short wavelength and are easily shielded, the arrangement of base stations for 5G millimeter wave communication becomes very dense. The large amount of radiation generated by the excessively dense base stations has a certain degree of potential safety hazard to human bodies and surrounding environments. Although there is no accurate data to show how the millimeter wave radiation affects the human body, it is necessary to prevent the effect of the millimeter wave electromagnetic radiation on the human body while enjoying the convenience of life brought by technological progress. With such a dense arrangement of base stations for 5G millimeter wave communication, much of the radiation generated by millimeter wave electromagnetic waves directly acts on the human body, which may cause harm to the human body.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an electromagnetic shielding structure and an electromagnetic shielding body, and aims to solve the technical problem that excessive radiation generated by millimeter wave electromagnetism directly acts on a human body in the prior art.
In order to achieve the above object, the present invention provides an electromagnetic shielding structure, which includes a supporting body, wherein an electromagnetic absorber is disposed on an outer side surface of the supporting body, the electromagnetic absorber includes a plurality of electromagnetic absorption layers, the electromagnetic absorption layers are one or more combinations of a ferrite layer, a carbon fiber layer, a carbon powder mixing layer, and an iron powder layer, and the electromagnetic absorption layers are sequentially stacked along a direction away from the supporting body.
The ferrite layer, the carbon fiber layer, the carbon powder mixing layer and the iron powder layer have certain electromagnetic wave absorption capacity respectively, the effect of absorbing electromagnetic wave energy with different degrees is generated after the ferrite layer, the carbon fiber layer, the carbon powder mixing layer and the iron powder layer are combined in a certain proportion, the electromagnetic wave absorption effect is achieved by absorbing the electromagnetic wave energy, and different combination forms can be realized according to different use occasions. In the utility model, the support body plays a role of a carrier, and the electromagnetic absorber is convenient to arrange and move.
Preferably, the electromagnetic absorption layer disposed on the outermost side of the electromagnetic absorber is an iron powder layer. In the ferrite layer, the carbon fiber layer, the carbon powder mixing layer and the iron powder layer, the iron powder layer is relatively firm and is not easy to damage. Therefore, the iron powder layer is arranged on the outermost side of the electromagnetic absorber far away from the support body, so that the other components of other electromagnetic absorption layers can be protected, and the service life of the electromagnetic shielding structure is prolonged.
Preferably, the electromagnetic absorber includes a ferrite layer, a carbon fiber layer, a carbon powder mixing layer and an iron powder layer, and the ferrite layer, the carbon fiber layer, the carbon powder mixing layer and the iron powder layer are sequentially stacked on the outer side surface of the support body along a direction away from the support body. When the ferrite layer, the carbon fiber layer, the carbon powder mixing layer and the iron powder layer are sequentially arranged on the outer side surface of the support body along the direction far away from the support body, the electromagnetic shielding structure has a good electromagnetic wave and electromagnetic absorption effect.
Preferably, the thickness ratio of the support body, the ferrite layer, the carbon fiber layer, the carbon powder mixing layer and the iron powder layer is 1: 1.2 ± 0.5: 1.3 ± 0.5: 3.5 plus or minus 2:1.05 plus or minus 0.5. When supporter, ferrite layer, carbon fiber layer, carbon powder mix the layer and the iron powder layer is located the lateral surface of supporter and thickness ratio is 1 along the direction of keeping away from the supporter in proper order: 1.2 ± 0.5: 1.3 ± 0.5: 3.5 +/-2: 1.05 +/-0.5, the electromagnetic wave energy absorption effect of the electromagnetic shielding structure can be further improved.
Preferably, the electromagnetic absorber is arranged on the outer side surface of the support body by means of vacuum plating or spraying. The electromagnetic absorption layer can be more firmly arranged on the outer side surface of the support body by using a vacuum plating or spraying mode.
In addition, the utility model also provides an electromagnetic shielding body with the electromagnetic shielding structure. By adopting the electromagnetic shielding structure, the electromagnetic shielding body absorbs the energy of the electromagnetic wave to achieve the electromagnetic shielding effect.
Preferably, the electromagnetic shield further comprises a plurality of through holes, and the electromagnetic shield structures are staggered to form the through holes. The through hole is arranged on the shielding body, the space provided with the electromagnetic shielding body can be kept bright through the light transmission of the through hole, and the frequency of the electromagnetic wave which can be shielded by the electromagnetic shielding body is determined by the size of the through hole.
Preferably, the plurality of through holes are uniformly distributed on the electromagnetic shield. The through holes are uniformly distributed on the electromagnetic shielding body, so that the shielding effect of all parts of the electromagnetic shielding body is kept consistent basically, and meanwhile, the electromagnetic shielding body is more attractive.
Preferably, the electromagnetic shield includes a front side and a rear side, the through hole is disposed along a direction from the front side to the rear side, and the electromagnetic absorber is disposed on the front side and the rear side. Electromagnetic absorbers are arranged on the front side and the back side of the electromagnetic shield, so that the shielding effect of the electromagnetic shield can be enhanced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an electromagnetic shielding structure in an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an electromagnetic shield in an embodiment of the present invention;
fig. 3 is a top view of an electromagnetic shield in an embodiment of the utility model.
In the drawings: 1-support body, 2-ferrite layer, 3-carbon fiber layer, 4-carbon powder mixing layer, 5-iron powder layer, 6-electromagnetic absorber, 7-electromagnetic shield, 8-through hole and 9-electromagnetic shield structure.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indication is involved in the embodiment of the present invention, the directional indication is only used for explaining the relative positional relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1 to 3, an electromagnetic shielding structure 9 includes a supporting body 1, an electromagnetic absorber 6 is disposed on an outer side surface of the supporting body 1, the electromagnetic absorber 6 includes a plurality of electromagnetic absorption layers, the electromagnetic absorption layers are ferrite layers 2, carbon fiber layers 3, carbon powder mixing layers 4 or iron powder layers 5, and the electromagnetic absorption layers are sequentially stacked in a direction away from the supporting body 1.
The ferrite layer 2, the carbon fiber layer 3, the carbon powder mixing layer 4 and the iron powder layer 5 respectively have certain electromagnetic wave absorption capacity, the effect of absorbing electromagnetic wave energy with different degrees is generated after the ferrite layer, the carbon fiber layer, the carbon powder mixing layer and the iron powder layer are combined in a certain proportion, the electromagnetic shielding effect is achieved by absorbing the electromagnetic wave energy, and different combination forms can be realized according to different use occasions. In the present invention, the support body 1 functions as a carrier, and facilitates the installation and movement of the electromagnetic absorber 6.
In this embodiment, the supporting body 1 is a supporting block with a square outer contour, and is made of hard plastic or steel materials, which can support the electromagnetic absorber 6 well, and the supporting body 1 made of different materials can be selected according to different application occasions.
Furthermore, the electromagnetic absorber 6 includes an iron powder layer 5, and the iron powder layer 5 is disposed on the outermost side of the electromagnetic absorbing layer 6 away from the support body 1. Among the ferrite layer 2, the carbon fiber layer 3, the carbon powder mixture layer 4, and the iron powder layer 5, the iron powder layer 5 is relatively strong and is not easily broken. Therefore, the iron powder layer 5 is arranged on the outermost side of the electromagnetic absorption layer 6 far away from the support body 1, so that other components of the electromagnetic absorption layer 6 can be protected, and the service life of the electromagnetic shielding structure 9 can be prolonged.
Further, the carbon powder mixing layer 4 includes urethane foam and carbon powder, and the carbon powder is disposed inside the urethane foam. The carbon powder mixing layer 4 is prepared by the following steps: the urethane foam particles are mixed with carbon powder, and then the carbon powder mixed layer 4 is prepared by hot extrusion molding.
The electromagnetic absorption layer 6 comprises a ferrite layer 2, a carbon fiber layer 3, a carbon powder mixing layer 4 and an iron powder layer 5, wherein the ferrite layer 2, the carbon fiber layer 3, the carbon powder mixing layer 4 and the iron powder layer 5 are sequentially arranged on the outer side surface of the support body 1 along the direction away from the outer side surface of the support body 1. When the ferrite layer 2, the carbon fiber layer 3, the carbon powder mixing layer 4 and the iron powder layer 5 are sequentially arranged on the outer side surface of the support body 1 along the direction far away from the outer side surface of the support body 1, the electromagnetic shielding structure 9 has a good electromagnetic wave energy absorption effect.
Further, the thickness ratio of the support body 1, the ferrite layer 2, the carbon fiber layer 3, the carbon powder mixing layer 4 and the iron powder layer 5 is 1: 1.2 ± 0.5: 1.3 ± 0.5: 3.5 +/-2: 1.05 +/-0.5. When the support body 1, the ferrite layer 2, the carbon fiber layer 3, the carbon powder mixing layer 4 and the iron powder layer 5 are sequentially arranged on the outer side surface of the support body 1 along the direction away from the outer side surface of the support body 1, and the thickness proportion is 1: 1.2 ± 0.5: 1.3 ± 0.5: 3.5 +/-2: 1.05 +/-0.5, the electromagnetic wave energy absorption function of the electromagnetic shielding structure 9 can be further improved. When the thickness ratio of the support body 1, the ferrite layer 2, the carbon fiber layer 3, the carbon powder mixing layer 4 and the iron powder layer 5 is 1: 1.2: 1.3: 3.5: 1.05, the electromagnetic wave energy absorption of the electromagnetic shielding structure 9 is optimized.
In the case where the total thickness of the electromagnetic absorber 6 is 1.2mm or more, the shielding effectiveness in the frequency range of 1 to 50GHz is more than 80 dB.
The electromagnetic absorber 6 is arranged on the outer side surface of the support body 1 by a vacuum plating or spraying mode. The electromagnetic absorber 6 can be more firmly arranged on the outer side surface of the support body 1 by using a vacuum plating or spraying mode.
In addition, the present embodiment further includes an electromagnetic shield 7 having the above electromagnetic shielding structure 9. By adopting the electromagnetic shielding structure 9, the electromagnetic shielding body 7 absorbs electromagnetic wave energy to achieve the electromagnetic shielding effect.
Further, the electromagnetic shielding body 7 further includes a plurality of through holes 8, and the electromagnetic shielding structures 9 are arranged in a staggered manner to form the through holes 8. The through hole 8 is arranged on the shielding body, the space provided with the electromagnetic shielding body 7 can be kept bright by the light transmission of the through hole 8, and the frequency of the electromagnetic wave which can be shielded by the electromagnetic shielding body 7 is determined by the size of the through hole 8.
The through holes 8 of the electromagnetic shield 7 in this embodiment are square through holes 8, the size of each through hole 8 is the same, and the electromagnetic shield 7 is integrally in a multi-tube grid structure.
Setting the side length of the square opening of each through hole 8 as w and the length of each through hole 8 as a; according to the method for calculating Shielding Effectiveness (SE), when electromagnetic waves are irradiated into a shielding body, the formula for calculating shielding effectiveness is as follows:
SE＝27.3×(a/w)-20log(2kw/Π)×cos(θ)]
wherein k is the wave number of the incident electromagnetic wave, theta is the incident angle of the electromagnetic wave, and pi is the circumferential ratio; it can be found that the smaller the side length w of the square opening of the hole, the longer the length a of the through-hole 8, the higher the frequency of the electromagnetic wave that can be suppressed.
The shielding effectiveness is about 80dB when a is 3mm and w is 1mm for incident electromagnetic wave frequency of 30 GHz.
Further, the through holes 8 are uniformly distributed on the electromagnetic shield 7. The through holes 8 are uniformly distributed on the electromagnetic shielding body 7, which is beneficial to keeping the shielding effect of all parts of the electromagnetic shielding body 7 basically consistent, and simultaneously, the electromagnetic shielding body 7 is more beautiful.
Further, the electromagnetic shield 7 includes a front side surface and a rear side surface, the through hole 8 is disposed along the direction from the front side surface to the rear side surface, and the electromagnetic absorption layer 6 is disposed on the front side surface and the rear side surface. The electromagnetic absorption layers 6 are disposed on the front side and the back side of the electromagnetic shield 7, so that the shielding effect of the electromagnetic shield 7 can be enhanced.
The electromagnetic shielding body 7 is in a form similar to a waveguide window, achieves good shielding efficiency and good ventilation, and is particularly suitable for being installed on three-dimensional space structure objects such as houses.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. An electromagnetic shielding structure, characterized in that: the supporting structure comprises a supporting body (1), wherein an electromagnetic absorber (6) is arranged on the outer side surface of the supporting body (1), the electromagnetic absorber (6) comprises a plurality of electromagnetic absorption layers, the electromagnetic absorption layers are one or more combinations of a ferrite layer (2), a carbon fiber layer (3), a carbon powder mixing layer (4) and an iron powder layer (5), and all the electromagnetic absorption layers are sequentially stacked in the direction away from the supporting body (1).
2. The electromagnetic shielding structure of claim 1, wherein: the electromagnetic absorption layer arranged on the outermost side of the electromagnetic absorber (6) is the iron powder layer (5).
3. The electromagnetic shielding structure of claim 1, wherein: the electromagnetic absorber (6) comprises a ferrite layer (2), a carbon fiber layer (3), a carbon powder mixing layer (4) and an iron powder layer (5), wherein the ferrite layer (2), the carbon fiber layer (3), the carbon powder mixing layer (4) and the iron powder layer (5) are sequentially stacked and arranged on the outer side surface of the support body (1) along the direction away from the support body (1).
4. The electromagnetic shielding structure of claim 3, wherein: the thickness proportion of the support body (1), the ferrite layer (2), the carbon fiber layer (3), the carbon powder mixing layer (4) and the iron powder layer (5) is 1: 1.2 ± 0.5: 1.3 ± 0.5: 3.5 +/-2: 1.05 +/-0.5.
5. The electromagnetic shielding structure of claim 1, wherein: the electromagnetic absorber (6) is arranged on the outer side surface of the support body (1) in a vacuum plating or spraying mode.
6. An electromagnetic shield, comprising: comprising a plurality of electromagnetic shielding structures (9) according to any of claims 1 to 5.
7. The electromagnetic shield of claim 6, wherein: the electromagnetic shielding body (7) further comprises a plurality of through holes (8), and the electromagnetic shielding structures (9) are arranged in a staggered mode to form the through holes (8).
8. The electromagnetic shield of claim 7, wherein: the through holes (8) are uniformly distributed on the electromagnetic shielding body (7).
9. The electromagnetic shield of claim 7, wherein: the electromagnetic shield body (7) comprises a front side face and a rear side face, the through hole (8) is formed in the direction from the front side face to the rear side face, and the electromagnetic absorber (6) is arranged on the front side face and the rear side face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121550580.3U CN215991800U (en) | 2021-07-07 | 2021-07-07 | Electromagnetic shielding structure and electromagnetic shielding body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121550580.3U CN215991800U (en) | 2021-07-07 | 2021-07-07 | Electromagnetic shielding structure and electromagnetic shielding body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215991800U true CN215991800U (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121550580.3U Active CN215991800U (en) | 2021-07-07 | 2021-07-07 | Electromagnetic shielding structure and electromagnetic shielding body |
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| Country | Link |
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| CN (1) | CN215991800U (en) |
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2021
- 2021-07-07 CN CN202121550580.3U patent/CN215991800U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: GUANGXI LANHE CHANGXIN DATA TECHNOLOGY Co.,Ltd. Assignor: Yulin Normal University Contract record no.: X2022450000304 Denomination of utility model: An electromagnetic shielding structure and electromagnetic shielding body Granted publication date: 20220308 License type: Common License Record date: 20221209 |
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| EE01 | Entry into force of recordation of patent licensing contract |