CN211128849U

CN211128849U - Signal shielding device

Info

Publication number: CN211128849U
Application number: CN201922404054.5U
Authority: CN
Inventors: 吴维检
Original assignee: Kunshan Hamilton Communication Technology Co ltd
Current assignee: Kunshan Hamilton Communication Technology Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-07-28
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses a signal shielding device relates to wireless communication technical field. The signal shielding device comprises a box body, a bottom plate, a microstrip line and a coaxial cable, wherein the box body and the bottom plate are of metal plate structures, the bottom plate is positioned at the bottom of the box body and connected with the box body, and a cavity of the box body is sealed by the bottom plate; the microstrip line is arranged in the cavity and is fixedly connected with the bottom plate; one end of the coaxial cable is connected with the microstrip line, and the other end of the coaxial cable extends out of the cavity and is used for transmitting signals. The utility model provides a signal shielding device compact structure, it is small, with low costs, can set up this signal shielding device's volume according to the volume of product, the effectual multipurpose and the extensive problem of having solved the product.

Description

Signal shielding device

Technical Field

The utility model relates to a wireless communication technology field especially relates to a signal shielding device.

Background

With the development of scientific technology, wireless communication has also become widely popular, and the existing radio control technology mainly uses a method of transmitting a radio frequency in a specific band, while the receiving end mainly has a wide receiving range. Even if a receiving end receiving the specific frequency is available, the anti-interference performance is worried, and the transmission of the radio is required to be stable, so that only one device receiving the specific frequency and filtering other irrelevant frequency bands with a shielding function is important. Traditional signal shield assembly adopts the cavity mode mostly, and the reuse connects the switching for the shielding signal plays the effect that does not disturb other performances of product.

However, the traditional signal shielding device is large in size, heavy in weight, high in manufacturing cost and high in cost, and an adapter is required.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a signal shielding device for in the product that the space is narrow and small, compact structure, cost pressure are big.

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

a signal shielding device, comprising:

the box body and the bottom plate are of metal plate structures, the bottom plate is positioned at the bottom of the box body and connected with the box body, and the cavity of the box body is sealed by the bottom plate;

the microstrip line is arranged in the cavity and is fixedly connected with the bottom plate;

and one end of the coaxial cable is connected with the microstrip line, and the other end of the coaxial cable extends out of the cavity and is used for transmitting signals.

Optionally, the box body and the bottom plate are hermetically connected by soldering and welding.

Optionally, a clamping groove is formed in the bottom plate, and a clamping plate matched with the clamping groove is arranged on the box body.

Alternatively, the microstrip line and the coaxial cable are connected by soldering.

Optionally, the microstrip line and the bottom plate are connected by a connection mechanism, and a preset gap is formed between the microstrip line and the bottom plate.

Optionally, a supporting body is further disposed between the microstrip line and the bottom plate, and the supporting body is configured to support the microstrip line.

Optionally, the preset gap is greater than or equal to 2 mm.

Optionally, the support is made of metal.

Optionally, the connection mechanism comprises a bolt and a nut, which cooperate to connect the microstrip line and the backplane.

Optionally, the number of the coaxial cables is two, and the two coaxial cables are respectively connected to two ends of the microstrip line.

The utility model has the advantages that:

the utility model provides a signal shielding device, make box body and bottom plate into the panel beating structure, the panel beating has light in weight, intensity is high, electrically conductive (can be used for electromagnetic shield), with low costs, large-scale volume production can characteristics such as good, solved the problem that shielding box body is bulky and heavy among the prior art; the coaxial cable is directly connected with the microstrip line, a conversion head is not needed, and the coaxial cable is used in products with compact structure and high cost pressure. And the volume of product is limited by signal shield assembly's volume among the prior art, the utility model provides a signal shield assembly compact structure can set up this signal shield assembly's volume according to the volume of product, the effectual multipurpose and the extensive problem of having solved the product.

Drawings

Fig. 1 is a schematic structural diagram of a signal shielding apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram in the box body of the signal shielding device provided by the embodiment of the present invention.

In the figure:

1. a box body; 2. a base plate; 3. a coaxial cable; 4. a support body; 5. a bolt; 6. a nut; 7. a microstrip line;

11. clamping a plate; 21. a clamping groove.

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.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

With the development of wireless communication systems, the size requirement of base station equipment is higher and higher, and the base station is required to be half or even smaller while maintaining the original performance. The signal shielding device is one of the main components of a power amplifier and a transmitter, plays a role in preventing radio frequency energy from leaking to the outside, and ensures that base station equipment passes an electromagnetic compatibility test.

As shown in fig. 1 and fig. 2, the signal shielding device provided in this embodiment includes a box body 1, a bottom plate 2, a microstrip line 7, and a coaxial cable 3, where the box body 1 and the bottom plate 2 are both of a sheet metal structure, the bottom plate 2 is located at the bottom of the box body 1 and connected to the box body 1, and the cavity of the box body 1 is sealed by the bottom plate 2; the microstrip line 7 is arranged in the cavity and is fixedly connected with the bottom plate 2; one end of the coaxial cable 3 is connected with the microstrip line 7, and the other end extends out of the cavity and is used for transmitting signals.

The utility model provides a signal shielding device, make box body 1 and bottom plate 2 into the sheet metal construction, the sheet metal has light in weight, intensity is high, electrically conductive (can be used for electromagnetic shield), with low costs, large-scale volume production performance characteristics such as good, solved the problem that shielding box body 1 is bulky and heavy among the prior art; the coaxial cable 3 is directly connected with the microstrip line 7, a conversion head is not needed, and the coaxial cable is used in products with compact structure and high cost pressure. And the volume of product is limited by signal shield assembly's volume among the prior art, the utility model provides a signal shield assembly compact structure can set up this signal shield assembly's volume according to the volume of product, the effectual multipurpose and the extensive problem of having solved the product.

Alternatively, in the present embodiment, the coaxial cables 3 are provided in two, and the two coaxial cables 3 are connected to both ends of the microstrip line 7, respectively. The coaxial cable 3 comprises a central lead, a metal shielding net and an insulating layer, and the central lead is connected with the microstrip line 7; the metal shielding net has two functions, namely, the metal shielding net serves as a common ground wire of a signal to provide a current loop for the signal, and serves as a shielding net of the signal to inhibit interference of electromagnetic noise to the signal, an insulating layer determines the transmission characteristic of the cable, the central conductor is effectively protected, and the coaxial cable 3 is used for connecting the microstrip line 7 with other parts and provides an interface for the microstrip line.

Preferably, the microstrip line 7 and the coaxial cable 3 are connected by soldering. The connection mode enables the connection to be firmer and the signal transmission to be more stable.

Alternatively, the case 1 and the base plate 2 are hermetically connected by solder welding. The signal shielding device provided by the embodiment is sealed in a welding mode, good in shielding effect and long in service life.

Optionally, a clamping groove 21 is formed in the bottom plate 2, and a clamping plate 11 matched with the clamping groove 21 is arranged on the box body 1. The clamping groove 21 and the clamping plate 11 are arranged to realize rapid positioning of the bottom plate 2 and the box body 1, so that the box body 1 is more convenient to connect with the bottom plate 2.

Optionally, the microstrip line 7 is connected with the base plate 2 through a connection mechanism, and a preset gap is formed between the microstrip line 7 and the base plate 2. Specifically, the preset gap is 2mm or more. In the present embodiment, the gap between the microstrip line 7 and the bottom plate 2 can effectively prevent the microstrip line 7 from interfering with other performances of the product.

Specifically, the microstrip line antenna further comprises a supporting body 4, the supporting body 4 is disposed between the microstrip line 7 and the bottom plate 2, and the supporting body 4 is used for supporting the microstrip line 7, so that a certain gap is maintained between the microstrip line 7 and the bottom plate 2.

Preferably, the support body 4 is made of metal. In this embodiment, the supporting body 4 is a metal supporting column, and the number of the metal supporting columns is four, and the metal supporting columns are uniformly distributed between the microstrip line 7 and the bottom plate 2 to provide support for the microstrip line 7. Of course, in other embodiments, the supporting body 4 may be made of plastic, but the supporting body 4 made of plastic is easily deformed by heat, which affects the service life of the signal shielding device.

Alternatively, the connecting mechanism is a bolt 5 and a nut 6, and the bolt 5 and the nut 6 cooperate to connect the microstrip line 7 and the bottom plate 2. In this embodiment, the bolt 5 passes through the microstrip line 7, the metal support post and the base plate 2, and is locked with the nut 6. Of course, in other embodiments, the microstrip line 7 may also be connected to one end of the supporting body 4 by means of pasting or welding, and the other end of the supporting body 4 is fixedly connected to the bottom plate 2.

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. A signal shielding device, comprising:

the box body (1) and the bottom plate (2) are of sheet metal structures, the bottom plate (2) is located at the bottom of the box body (1) and connected with the box body (1), and a cavity of the box body (1) is sealed by the bottom plate (2);

the microstrip line (7) is arranged in the cavity and fixedly connected with the bottom plate (2);

one end of the coaxial cable (3) is connected with the microstrip line (7), and the other end of the coaxial cable (3) extends out of the cavity and is used for transmitting signals.

2. The signal shielding device according to claim 1, characterized in that the box body (1) and the bottom plate (2) are sealingly connected by soldering welding.

3. The signal shielding device according to claim 2, wherein a slot (21) is disposed on the bottom plate (2), and a card board (11) adapted to the slot (21) is disposed on the box body (1).

4. The signal shielding device according to claim 1, characterized in that the microstrip line (7) and the coaxial cable (3) are connected by soldering.

5. The signal shielding device according to claim 1, wherein the microstrip line (7) and the bottom plate (2) are connected by a connecting mechanism, and a predetermined gap is formed between the microstrip line (7) and the bottom plate (2).

6. The signal shielding device according to claim 5, characterized in that a support body (4) is further disposed between the microstrip line (7) and the bottom plate (2), and the support body (4) is used for supporting the microstrip line (7).

7. The signal shielding device of claim 5, wherein the predetermined gap is greater than or equal to 2 mm.

8. Signal shielding device according to claim 6, characterized in that the supporting body (4) is made of metal.

9. The signal shielding device according to claim 5, wherein the connecting mechanism comprises a bolt (5) and a nut (6), and the bolt (5) and the nut (6) are matched to connect the microstrip line (7) and the bottom plate (2).

10. The signal shielding device according to claim 1, wherein the number of the coaxial cables (3) is two, and the two coaxial cables (3) are respectively connected to both ends of the microstrip line (7).