CN209930822U - Shielding device - Google Patents
Shielding device Download PDFInfo
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- CN209930822U CN209930822U CN201821955413.5U CN201821955413U CN209930822U CN 209930822 U CN209930822 U CN 209930822U CN 201821955413 U CN201821955413 U CN 201821955413U CN 209930822 U CN209930822 U CN 209930822U
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- antenna
- housing
- shielding
- circuit board
- shielding device
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Abstract
The utility model provides a shielding device (10), include: an antenna (14) provided on the circuit board (12), and a shield layer (16) provided so as to surround the antenna (14). The utility model aims to realize the electromagnetic property of reinforcing electronic product at least.
Description
Technical Field
The utility model relates to an electromagnetic radiation field specifically relates to a shielding device.
Background
At present, the shielding method used by various electronic products in improving EMC performance is mainly a good conductor grounding shielding manner, such as grounding shielding of a pure metal housing. This shielding is done to shield the electromagnetic waves of all frequencies to which the product is exposed, including the operating frequencies of some products themselves. For example, the working frequencies of wireless intelligent keys, Bluetooth and wifi are not capable of shielding corresponding antennas, so that the antennas become receiving and transmitting antennas with certain useless frequencies, and the risk that EMC authentication is not passed is increased.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the correlation technique, the utility model aims to provide a shield assembly to at least, realize reinforcing electronic product's electromagnetic property.
In order to achieve the above object, the present invention provides a shielding device, including: the antenna comprises an antenna arranged on the circuit board and a shielding layer arranged around the antenna.
According to an embodiment of the present invention, the shielding layer is a layered shielding structure made of a metamaterial.
According to an embodiment of the present invention, the shielding layer has a side wall and a top surface connected to the side wall, wherein the antenna is located in the accommodating space formed by the side wall and the top surface.
According to the utility model discloses an embodiment, the circuit board passes through the screw fastening on the bottom plate.
According to the utility model discloses an embodiment is provided with first casing on the bottom plate, and first casing surrounds circuit board, antenna and shielding layer.
According to the utility model discloses an embodiment, the shielding layer sets up on the bottom plate and through glued membrane adhesion on the inner wall of first casing.
According to the utility model discloses an embodiment still is provided with the second casing that is surrounded by first casing on the circuit board, and the antenna is surrounded to the second casing, and the shielding layer sets up on the circuit board and through glued membrane adhesion on the inner wall of second casing.
According to the utility model discloses an embodiment, circuit board and bottom plate interval set up.
According to an embodiment of the present invention, the first housing and the bottom plate are electrically connected to each other, and the first housing and the second housing are PVC housings.
According to an embodiment of the invention, the antenna is fixed or printed on the circuit board.
The utility model has the advantages of:
the utility model discloses under the prerequisite that does not use good conductor ground connection of metal, surround the antenna as the shielding layer through the electromagnetism metamaterial, can be under the condition that does not reduce signal quality, the electromagnetic compatibility performance of reinforcing product reduces the electromagnetic emission of product to improve the electromagnetic interference rejection performance of product, and then promote the stability of product in work and with whole work system's compatibility.
Drawings
Figure 1 shows a perspective view of one embodiment of the shielding device of the present invention;
figure 2 shows a cross-sectional view of one embodiment of the shielding device of the present invention;
figure 3 shows a cross-sectional view of another embodiment of the shielding device of the present invention.
Detailed Description
The present invention will be further explained with reference to fig. 1 to 3.
Fig. 1 and 2 show a shielding device 10 according to an embodiment of the present invention. The shielding device 10 includes: an antenna 14 disposed on the circuit board 12, and a shield layer 16 disposed around the antenna 14. The antenna 14 may be any antenna type including a conductor, such as a microstrip antenna, a waveguide slot antenna, and a horn antenna. The antenna 14 is fixed or printed on the circuit board 12 as a transmitting and receiving antenna.
According to an embodiment of the present invention, the shielding layer 16 is a layered shielding structure made of a metamaterial. The shielding layer 16 has a side wall 17 and a top surface 19 connected to the side wall 17, and the antenna 14 is located in a receiving space 21 formed by the side wall 17 and the top surface 19. The shielding layer 16 may also be a hemispherical structure, or other structures that may surround the antenna 14, but the invention is not limited thereto.
According to an embodiment of the present invention, the circuit board 12 is fastened to the bottom plate 20 by screws 18, and the circuit board 12 and the bottom plate 20 are spaced apart from each other. In one embodiment, the screws 18 may be ground screws and the base plate 20 may be a metal base plate. The circuit board 12 is electrically connected to a metal base plate 20 by screws 18, which form the bottom part of the shielding device 10.
According to an embodiment of the present invention, referring specifically to fig. 2, the bottom plate 20 is provided with a first housing 22, and the first housing 22 is electrically connected to the bottom plate 20. The first housing 22 surrounds the circuit board 12, the antenna 14 and the shield 16. The shield layer 16 is disposed on the base plate 20 and adhered to the inner wall of the first housing 22 by an adhesive film 24. In other words, the shield layer 16 has the same structure and shape as the first housing 22. The shield layer 16 is bonded to the inner wall of the first case 22 via an adhesive film 24. In one embodiment, the shield layer 16 completely covers the inner surface of the first housing 22, and the circuit board 12 and the antenna 14 are located in the receiving space formed by the shield layer 16 and the bottom plate 20.
According to the utility model discloses an embodiment carries out the frequency-selective shielding by the metamaterial, is low impedance effect to the normal operating frequency of product, is high impedance shielding effect to non-operating frequency, and the parcel of full coverage is shielded, is applicable to the whole condition that easily receives the interference of circuit board (PCB board).
According to an embodiment of the present invention, referring specifically to fig. 3, a second housing 26 surrounded by the first housing 22 is further disposed on the circuit board 12. The second case 26 surrounds the antenna 14, and the shield layer 16 is disposed on the circuit board 12 and adhered to the inner wall of the second case 26 by the adhesive film 24. In other words, the shield layer 16 has the same structure and shape as the second housing 26. The shield layer 16 is bonded to the inner wall of the second case 26 via the adhesive film 24.
According to an embodiment of the present invention, the second casing 26 is completely covered on the antenna 14 and fixed on the circuit board 12, and the first casing 22 is directly combined with the metal base plate 20 as an outer protection layer. The antenna 14 is located in a receiving space formed by the shield layer 16 and the circuit board 12. The circuit board 12, the antenna 14, the second housing 26, and the adhesive film 24 and the shielding layer 16 adhered to the inner wall of the second housing 26 are co-located in the accommodating space formed by the first housing 22 and the bottom plate 20. In the first embodiment, the shield layer 16 is not provided on the inner wall of the first housing 22.
According to one embodiment of the present invention, the first housing 22 and the second housing 26 may be any non-metallic housing for supporting and protecting against physical agents, such as PVC housings.
According to the utility model discloses an embodiment carries out the frequency-selecting shielding by the metamaterial, is low impedance effect to the normal operating frequency of product, is high impedance shielding effect to non-operating frequency, and this shielding mode has only been directed against working antenna, does not do shielding measure to other inter-plate circuits, the interference killing feature of aim at reinforcing antenna.
According to the embodiment, by means of material frequency design of the electromagnetic metamaterial, useless signals are shielded, useful signals are selected, and a bidirectional filtering scheme is formed. The electromagnetic compatibility of the product is enhanced without degrading the signal quality.
The utility model discloses an in the research and development process, owing to not only consider useful signal's quality, reduce the loss, increase again to the shielding ability of useless signal frequency channel, need through a large amount of calculations and emulation, increase the slope of the frequency response of the corresponding frequency point of metamaterial.
The utility model is suitable for a various wireless communication products, like car intelligent key, intercom, cell-phone antenna, vehicle antenna, etc. In the application of the product, the electromagnetic compatibility of the product can be enhanced, the electromagnetic emission of the product can be reduced, and the electromagnetic interference resistance of the product can be improved under the condition of not reducing the signal quality.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A shielding device (10), comprising: the antenna comprises an antenna (14) arranged on a circuit board (12) and a shielding layer (16) arranged around the antenna (14).
2. Shielding device (10) according to claim 1, characterized in that the shielding layer (16) is a layered shielding structure made of a metamaterial.
3. Shielding device (10) according to claim 1, characterized in that the shielding layer (16) has side walls (17) and a top surface (19) connected to the side walls (17), wherein the antenna (14) is located in a receiving space (21) formed by the side walls (17) and the top surface (19).
4. Shielding device (10) according to claim 1, characterized in that the circuit board (12) is fastened to the base plate (20) by means of screws (18).
5. Shielding device (10) according to claim 4, wherein a first housing (22) is arranged on the base plate (20), said first housing (22) enclosing the circuit board (12), the antenna (14) and the shielding layer (16).
6. Shielding device (10) according to claim 5, wherein the shielding layer (16) is provided on the base plate (20) and is adhered to the inner wall of the first housing (22) by means of an adhesive film (24).
7. Shielding device (10) according to claim 5, wherein the circuit board (12) is further provided with a second housing (26) surrounded by the first housing (22), the second housing (26) surrounding the antenna (14), the shielding layer (16) being provided on the circuit board (12) and adhered to an inner wall of the second housing (26) by an adhesive film (24).
8. Shielding device (10) according to claim 4, wherein said circuit board (12) and said bottom plate (20) are arranged spaced apart.
9. The shielding device (10) according to claim 7, wherein the first housing (22) and the bottom plate (20) are electrically non-connected and the first housing (22) and the second housing (26) are PVC housings.
10. Shielding device (10) according to claim 1, characterized in that the antenna (14) is fixed or printed on the circuit board (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821955413.5U CN209930822U (en) | 2018-11-26 | 2018-11-26 | Shielding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821955413.5U CN209930822U (en) | 2018-11-26 | 2018-11-26 | Shielding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209930822U true CN209930822U (en) | 2020-01-10 |
Family
ID=69064457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821955413.5U Active CN209930822U (en) | 2018-11-26 | 2018-11-26 | Shielding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209930822U (en) |
-
2018
- 2018-11-26 CN CN201821955413.5U patent/CN209930822U/en active Active
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| GR01 | Patent grant |