CN210984968U

CN210984968U - Electromagnetic reflective film

Info

Publication number: CN210984968U
Application number: CN201922101704.9U
Authority: CN
Inventors: 苏陟; 高强
Original assignee: Guangzhou Fangbang Electronics Co Ltd
Current assignee: Guangzhou Fangbang Electronics Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-07-10
Anticipated expiration: 2029-11-29

Abstract

The utility model relates to an electromagnetic reflection membrane, including the conducting layer with set up the salient structure on the conducting layer, the salient structure includes a plurality of convex parts, a plurality of convex part intervals set up in the surface of conducting layer, and the interval between at least some convex parts is different in a plurality of convex parts. The electromagnetic reflection film enables incident electromagnetic waves to be reflected and diffusely reflected on the surface of the conductive layer by arranging the convex structure on the surface of the conductive layer, so that the original propagation direction of the electromagnetic waves is changed, and the intensity of the electromagnetic waves in a specified range is further enhanced.

Description

Electromagnetic reflective film

Technical Field

The utility model relates to the field of communication technology, especially, relate to an electromagnetic reflection membrane.

Background

In the existing radio communication, electromagnetic waves emitted by a signal source can be spread in multiple directions and angles, and the application range of signal receiving equipment is enlarged. However, for some relatively fixed receiving devices, due to the influence of the angle or the intensity of surrounding signals, the signals cannot be received or are weak, and the communication quality is affected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electromagnetic reflection membrane, it can make the electromagnetic wave take place reflection and diffuse reflection on the conducting layer surface, changes the original direction of propagation of electromagnetic wave.

To achieve the purpose, the utility model adopts the following technical proposal:

the provided electromagnetic reflection film comprises a conductive layer and a protruding structure arranged on the conductive layer, wherein the protruding structure comprises a plurality of protruding parts, the protruding parts are arranged on the surface of the conductive layer at intervals, and the intervals between at least one part of the protruding parts in the plurality of protruding parts are different.

Furthermore, along at least one direction parallel to the surface of the conducting layer, the distance between adjacent convex parts is a reflection distance, and the reflection distances are arranged in a trend that the middle part is large and the two sides are small.

Further, a medium is filled between adjacent convex parts, and the medium is arranged in a trend that the refractive index of the middle part is small and the refractive indexes of the two sides are large along at least one direction parallel to the surface of the conducting layer.

Further, the shape of the convex part is one or a combination of more of sharp angle, granule, column, block and sphere.

Furthermore, the plurality of convex parts are spirally distributed on the surface of the conducting layer.

Further, the protruding structure comprises a plurality of structure groups formed by annularly arranging the convex parts, and the structure groups are arranged at intervals and are concentric in center.

Further, along the radial direction of structure group, it is a plurality of structure group is from interior to exterior the height of convex part reduces in proper order.

Furthermore, the reflecting surface of the conducting layer is also provided with an adhesive film layer, and the protruding structure is embedded in the adhesive film layer or is positioned between the conducting layer and the adhesive film layer.

Furthermore, one side of the adhesive film layer, which is far away from the conductive layer, is provided with grooves, and the grooves are distributed in a net shape.

Further, the electromagnetic reflection film is planar or curved.

The utility model discloses compare in prior art's beneficial effect:

the utility model discloses an electromagnetic reflection membrane through set up the protrusion structure on the conducting layer surface, makes the incident electromagnetic wave take place reflection and diffuse reflection on the conducting layer surface, changes the original direction of propagation of electromagnetic wave, and then strengthens the electromagnetic wave intensity within the specified range.

Drawings

Fig. 1 is a cross-sectional view of an electromagnetic reflection film according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of an electromagnetic reflective film according to another embodiment of the present invention.

Fig. 3 is a cross-sectional view of an electromagnetic reflection film according to still another embodiment of the present invention.

Fig. 4 is a schematic distribution diagram of the protruding structures according to an embodiment of the present invention.

Fig. 5 is a schematic distribution diagram of a protruding structure according to another embodiment of the present invention.

In the figure:

1. a conductive layer; 2. a protruding structure; 3. a glue film layer; 4. a medium.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

As shown in fig. 1, the utility model provides an electromagnetic reflective film, including conducting layer 1 and the protruding structure 2 that sets up on conducting layer 1, protruding structure 2 includes a plurality of convex parts, and a plurality of convex parts intervals set up on the surface of conducting layer 1, and the interval between at least some convex parts is different in a plurality of convex parts. It is understood that the electromagnetic wave used in radio communication has a long wavelength and cannot penetrate the conductive layer 1. When electromagnetic waves are incident on the surface of the conductive layer 1, reflection occurs, and the normal of the reflection is perpendicular to the surface of the conductive layer 1. When the conductive layer 1 has the protruding structures 2 on the surface, part of the electromagnetic wave is incident on the protruding portions of the protruding structures 2, and the electromagnetic wave is diffusely reflected and propagates in different directions because the normal direction of reflection changes with the shape of the protruding portions. The density of diffuse reflection can be varied by varying the pitch between the projections, and diffuse reflection can be caused to occur to different degrees in different regions of the surface of the conductive layer 1 by controlling the pitch between the projections. In the electromagnetic reflection film of the present embodiment, the convex portion is provided on the conductive layer 1, and the electromagnetic wave incident on the surface of the conductive layer 1 is reflected and diffusely reflected, thereby changing the original propagation direction of the electromagnetic wave and propagating the electromagnetic wave to a predetermined region. Meanwhile, the convex parts are different in distance, so that the intensity of electromagnetic waves in a specified range can be enhanced, and communication receiving is facilitated.

Specifically, in at least one direction parallel to the surface of the conductive layer 1, the pitch between adjacent convex portions is a reflection pitch, and a plurality of reflection pitches are arranged in a tendency that the middle portion is large and both sides are small. In this embodiment, the distance between two adjacent convex portions satisfies that after the electromagnetic wave is reflected from one of the convex portions, a part of the electromagnetic wave is transmitted to the other convex portion to be reflected again, so that the electromagnetic wave is reflected for multiple times, and the transmission direction is more divergent. It can be understood that the gap area between two adjacent convex parts is a smooth plane, and the electromagnetic wave is reflected after being incident on the partial area. The reflection distance is the shortest distance between two adjacent convex parts, and the maximum reflection distance does not exceed the maximum linear distance between two points on the cross section of one convex part. Along at least one direction of the surface of the conducting layer 1, the distance between the adjacent convex parts is set in a trend that the middle part is large and the two sides are small, so that the convex parts are distributed more densely than the middle part along the two sides of the conducting layer 1, therefore, the electromagnetic waves subjected to diffuse reflection at the two sides are more than at the middle part, and the reflection angles at the two sides can be further enlarged. In the present embodiment, the at least one direction on the surface of the conductive layer 1 includes one or more of a length direction, a width direction, or an oblique angle direction of the conductive layer 1. For example: on the surface of the conductive layer 1, the reflection pitch between adjacent projections along the length direction is set in a tendency that the middle part is large and the two sides are small. The reflection distance gradually decreases from the center line position of the conductive layer 1 in the length direction to the side edge position of the conductive layer 1 in the length direction, and when electromagnetic waves enter the surface of the conductive layer 1, the intensity of the diffuse reflection of the electromagnetic waves at the two sides of the conductive layer 1 in the length direction is greater than the intensity of the diffuse reflection of the electromagnetic waves at the middle position.

As shown in fig. 3, a medium 4 is filled between adjacent convex portions, and the medium 4 is disposed such that the refractive index of the middle portion is small and the refractive index of the two sides is large in at least one direction parallel to the surface of the conductive layer 1. It is understood that the medium 4 is filled between the convex parts, which can protect the convex parts on one hand. On the other hand, the electromagnetic wave incident on the conductive layer 1 may be refracted when passing through the medium 4, so that the incident angle of the electromagnetic wave is changed, and the electromagnetic wave reflected or diffusely reflected from the conductive layer 1 may be refracted again through the medium 4, thereby further changing the original propagation direction of the electromagnetic wave. In this embodiment, along at least one direction of the surface of the conductive layer 1, the refractive indexes of the medium 4 located in the middle and the media 4 located at the two sides are different, so that the angles of the electromagnetic waves after refraction are different due to the different refractive indexes, and the refractive indexes of the two sides are large, so that the exit angles of the two sides can be increased. The medium 4 can be iodine crystal, copper oxide, crystal, quartz, polystyrene, glass, or other substances capable of refracting electromagnetic waves.

Referring to fig. 1 or fig. 2, the shape of the convex part is one or a combination of more of a sharp angle shape, a granular shape, a columnar shape, a block shape and a spherical shape. In the present embodiment, the convex portion functions to eliminate the smooth planar structure on the surface of the conductive layer 1 and promote the electromagnetic wave to diffuse on the surface thereof, and thus the shape of the convex portion is not limited to one or a combination of more of a pointed shape, a granular shape, a columnar shape, a block shape, and a spherical shape. The convex part can also be an irregular three-dimensional pattern, a grain and the like. The preferred triangle-shaped cone structure or spherical granular structure of this embodiment, triangle-shaped cone structure is from its top to bottom grow gradually, reduces top structure and causes the barrier for the bottom, makes the electromagnetic wave reach the surface of convex part smoothly.

In one embodiment, as shown in fig. 4, the plurality of protrusions are spirally distributed on the surface of the conductive layer 1. The plurality of projections includes all or a portion of the projections on the projection structure. The distribution shape of the convex parts can influence the propagation direction and the intensity distribution after electromagnetic wave reflection or diffuse reflection. The spiral distribution causes reflection and diffused reflection occurring on the reflection surface of the conductive layer 1 to intersect with each other, and electromagnetic waves are uniformly dispersed in a specific region.

In another embodiment, as shown in fig. 5, the protruding structure 2 includes a plurality of structural groups formed by annularly disposing protruding portions, and the plurality of structural groups are disposed at intervals and are concentric in the center. The plurality of projections includes all or a portion of the projections on the projection structure. The concentric distribution pattern allows electromagnetic waves to be reflected and diffusely reflected at intervals on the reflection surface of the conductive layer 1, and the electromagnetic waves to be uniformly dispersed in a specific region.

Specifically, along the radial direction of the structure groups, the heights of the plurality of structure groups from the inner convex part to the outer convex part are sequentially reduced. It can be understood that the height of the middle portion (the middle portion is the position adjacent to the center of the concentric circle) is greater than the height of the outer portion, so that the electromagnetic wave after being reflected by the convex portion of the middle portion can be prevented from being blocked by the convex portion of the outer portion on the way of propagating to the outer portion, and the propagation path of the electromagnetic wave can be prevented from being affected. In this embodiment, the height of the convex portions in each structure group is the same, the height of the convex portion in the first structure group from inside to outside is greater than the height of the convex portion in the second structure group, the height of the convex portion in the second structure group is greater than the height of the convex portion in the third structure group, and so on.

Specifically, the reflecting surface of the conductive layer 1 is further provided with an adhesive film layer 3, and the protruding structure 2 is embedded in the adhesive film layer 3, or the protruding structure 2 is located between the conductive layer 1 and the adhesive film layer 3. It can be understood that, the conductive layer 1 is thin and is provided with the protruding structure 2, so that the conductive layer 1 is easy to deform or the surface has the defects of concavity, convexity and the like, and the provision of the adhesive film layer 3 can protect the protruding structure 2, improve the overall strength of the conductive layer 1, and improve the usability of the conductive layer 1. In the embodiment shown in fig. 1, the protruding structure 2 is embedded in the adhesive film layer 3, so that the upper and lower surfaces of the whole electromagnetic reflection film are flat, and the protruding structure 2 is prevented from being damaged or locally deformed. In the embodiment shown in fig. 3, the medium 4 is filled between the convex portions of the protruding structures 2, the protruding structures 2 are located between the conductive layer 1 and the glue film layer 3, and the glue film layer 3 is disposed outside the medium layer, so as to protect the medium 4.

Specifically, one side of the adhesive film layer 3, which is far away from the conductive layer 1, is provided with grooves, and the grooves are distributed in a net shape. The grooves are arranged to reduce bending resistance by bending the electromagnetic reflection film.

Specifically, the electromagnetic reflection film is planar or curved. The electromagnetic reflecting film can be processed into a plane or curved surface shape to be attached and connected with a specific product structure so as to adapt to the requirements of various products.

Specifically, the conductive layer 1 is metal, conductive rubber, or other conductive material having electromagnetic shielding properties. In this embodiment, the material of the conductive layer 1 is preferably copper or copper alloy. Copper has a high density and good ductility and is suitable for processing.

The remarkable effects of the embodiment are as follows: the electromagnetic reflection film enables electromagnetic waves to be reflected and diffused after being incident on the surface of the conductive layer 1 by arranging the convex structures 2 on the surface of the conductive layer 1, changes the original propagation direction of the electromagnetic waves and enables the electromagnetic waves to be propagated to a specified area. Meanwhile, the convex parts of the convex structure 2 have different distances, so that the intensity of electromagnetic waves in a specified range is enhanced, and communication reception is utilized.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. The electromagnetic reflection film is characterized by comprising a conductive layer (1) and a protruding structure (2) arranged on the conductive layer (1), wherein the protruding structure (2) comprises a plurality of convex parts, the convex parts are arranged on the surface of the conductive layer (1) at intervals, and the intervals between at least one part of the convex parts are different.

2. The film according to claim 1, wherein, in at least one direction parallel to the surface of the conductive layer (1), the pitch between adjacent projections is a reflection pitch, and a plurality of the reflection pitches are arranged in a tendency that the center portion is large and both sides are small.

3. The film according to claim 1, wherein a medium (4) is filled between adjacent protrusions, and the medium (4) is disposed in a direction parallel to at least one of the surfaces of the conductive layer (1) such that the refractive index of the medium (4) is smaller in the middle and larger in the two sides.

4. The electromagnetic reflection film according to any one of claims 1 to 3, wherein the shape of the convex portion is one or a combination of sharp angular shape, granular shape, columnar shape, massive shape and spherical shape.

5. The film according to claim 1, wherein the plurality of protrusions are spirally distributed on the surface of the conductive layer (1).

6. The film according to claim 1, wherein the protruding structure (2) comprises a plurality of structural groups formed by annularly arranging the protruding portions, and the structural groups are arranged at intervals and are concentric in center.

7. The film according to claim 6, wherein the heights of the protrusions of the plurality of the structure groups decrease sequentially from inside to outside in a radial direction of the structure groups.

8. The electromagnetic reflection film according to claim 1, wherein the reflection surface of the conductive layer (1) is further provided with a glue film layer (3), and the protruding structure (2) is embedded in the glue film layer (3), or the protruding structure (2) is located between the conductive layer (1) and the glue film layer (3).

9. The electromagnetic reflection film according to claim 8, wherein a side of the adhesive film layer (3) away from the conductive layer (1) is provided with grooves, and the grooves are distributed in a net shape.

10. The electromagnetic reflective film according to claim 1, wherein the electromagnetic reflective film has a planar shape or a curved shape.