Lightning protection structure for antennas

Abstract

The application relates to an antenna lightning protection structure which adopts a combination of an upper cover and a metal lower cover to form an antenna shell, a plurality of intercommunication conductive arms are embedded in the antenna shell, the conductive arms are equally distributed in each direction of the upper cover body which can be struck by lightning, a thickened and widened metal sheet is arranged at the top end of the upper cover body to prevent instantaneous lightning from directly damaging the conductive arms, the conductive arms are a plurality of metal conductive arms connected with the metal sheet at the top end of the upper cover body and have a certain width, the conductive arms are preliminarily clamped and fixed by the upper cover body and the lower cover body, the bottom of the conductive arms is designed as a barb type, the tail end of the conductive arms is directly fixedly connected with a metal base, a connector coaxially connected with a PCB assembly plate is arranged in the metal base, an inner core antenna is arranged in the antenna lightning protection structure, and the inner core antenna is fixedly connected with the PCB assembly plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antenna, in particular to an antenna lightning protection structure. BACKGROUND

[0002] In the prior art, for large buildings, antenna devices and other places, lightning protection measures are basically to use to build external lightning rod, such as communication base station and the like, and lightning protection for small antennas is very lacking. Lightning is not a single way of destroying modern equipment, and there are space, feeder, signal, power supply, ground current, ground current, and high-impact lightning point. For antennas installed in the wild, such as vehicle-mounted antennas, their height and electromagnetic waves received during use will greatly increase the possibility of lightning strike, so lightning protection measures for small antennas are necessary. At present, for small antennas, direct current grounding or lightning arresters between the antenna and the device are basically used for protection; for some active antennas, in addition to lightning protection using lightning arresters, lightning protection design is also made for RF circuits, that is, a separate lightning protection circuit is designed and manufactured, which has good effect, but for the active circuit which has been finalized, designing an additional lightning protection circuit is equivalent to overturning the previous circuit production and redesigning the circuit, which will greatly increase the workload of engineers and the cost of products. At the same time, the lightning protection capability of small antennas is only realized by a single lightning protection antenna, and the lightning protection effect is relatively low. SUMMARY

[0003] In order to solve the above problems, the present application provides an antenna lightning protection structure which is convenient to install, simple in structure, can be directly applied to existing mature antenna circuit structure, and has strong lightning protection effect.

[0004] In order to achieve the above purpose, the antenna lightning protection structure designed by the present application comprises a combined upper cover, a metal lower cover, a core antenna, a connector and a PCB assembly plate. The combined upper cover and the metal lower cover form an antenna housing, the metal lower cover is fixedly connected with the PCB assembly plate on the upper side, and the connector is arranged on the lower side; the PCB assembly plate is fixedly connected with the core antenna, and the combined upper cover is internally embedded with a shunt strip structure. The structure is arranged by directly integrating the shunt strip structure on the antenna housing, and the size of the lightning protection necessary components is determined by the internal size of the antenna housing, so that the structure is simple and convenient to install, and the core antenna part can adopt various materials and types of antennas.

[0005] In order to preliminarily fix the shunt strip structure, the combined cover comprises a cover body and a lower cover body, the shunt strip structure is connected and communicated with the middle top metal protrusion in the cover body, and the lower cover body is matched with the cover body to limit and fix the shunt strip structure; the cover body is a metal piece, and the lower cover body is a plastic piece. The structure can preliminarily limit and fix the shunt strip structure, the cover body is a metal piece, and the lower cover body is a plastic piece, so that the lightning protection strength of the cover body can be enhanced, and the signal interference of the shunt strip structure on the internal antenna can be reduced.

[0006] In order to efficiently achieve the lightning protection effect, the shunt strip structure comprises a plurality of conductive arms and support arms which are sequentially arranged from top to bottom, the shunt strip structure is connected and communicated with each other at the central part of the combined cover, and the shunt strip structure is directly connected and communicated with the metal lower cover after bypassing the PCB assembly plate from the outer side of the PCB assembly plate. The structure makes the fixing of the shunt strip structure and the conductive arm more firm, the lightning can be conducted in multiple directions through the plurality of conductive arms, and the signal interference on the antenna can be further reduced.

[0007] In order to further achieve the efficient lightning protection effect, the conductive arms and the support arms are connected through bending parts and the shunt strip structure as a whole forms a curved hook shape, and the positions of the bending parts are matched with the PCB assembly plate in the horizontal plane; the PCB assembly plate is provided with an opening corresponding to the shape of the bending part, so that the shunt strip structure is arranged to bypass through the opening. A plurality of shunt strip structures are uniformly distributed in a circle with the middle top metal protrusion in the cover body as the center; the shunt strip structure is uniformly distributed in a circle with the middle top metal protrusion in the cover body as the center; the height of the conductive arm from the middle top metal protrusion of the cover body to the ground is required to be higher than the radiation surface of the antenna and the ground surface. The structure equally divides the curved surface of the conductive arm and the upper cover body, thereby effectively dispersing the intensity of lightning along the direction of the conductive arm, and increasing the width and height of the conductive arm can enhance the strength of the conductive arm itself, on the other hand, increase the conductivity of the conductive arm, and the metal sheet arranged on the upper cover body can prevent the intensity of lightning from being too large to directly damage the conductive arm.

[0008] In order to enhance the strength and waterproof performance of the antenna shell, the waterproof gasket is arranged on the inner wall of the antenna shell, the metal protrusion is integrally formed with the shunt strip structure, the recess matched with the shunt strip structure is arranged on the inner wall of the upper cover body, and the flow guide column is formed on the outer wall of the upper cover body. The elastic deformation of the conductive arm can reduce the gap between the upper and lower cover bodies, thereby improving the strength of the antenna shell, the flow guide column arranged on the upper cover body can guide the rainwater falling on the upper cover body during rainfall, and the waterproof gasket arranged on the inner wall of the antenna shell can prevent the internal part of the antenna shell from being penetrated by rainwater.

[0009] This invention relates to an antenna lightning protection structure. The structure comprises a combined upper cover and a lower metal cover to form an antenna housing. Multiple interconnected conductive arms are embedded within the antenna housing. These conductive arms are evenly distributed along the directions of the upper cover where lightning strikes are likely. A thickened and widened metal plate is located at the top of the upper cover to prevent direct damage to the conductive arms from a sudden lightning strike. The conductive arms are multiple metal conductive arms of a certain width connected to the metal plate at the top of the upper cover. The conductive arms are initially clamped and fixed by the upper and lower covers. The bottom of the conductive arms has a barbed design, allowing the tail end of the conductive arm to be directly fixedly connected to a metal base. A connector coaxially connected to a PCB assembly board is located within the metal base. The antenna lightning protection structure contains a core antenna, which is fixedly connected to the PCB assembly board. This configuration allows the size of the necessary lightning protection components to be determined based on the actual internal dimensions of the antenna housing. Furthermore, the internal antenna portion can utilize antennas of various materials and types. Attached Figure Description

[0010] Figure 1 This is an exploded view of the antenna lightning protection structure.

[0011] Figure 2 This is a side cross-sectional view of the antenna lightning protection structure.

[0012] Figure 3 This is a top view of the antenna lightning protection structure. Detailed Implementation

[0013] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0014] Example 1.

[0015] like Figure 1 To achieve the above objectives, the antenna lightning protection structure designed in this embodiment includes a combined upper cover 1, a metal lower cover 2, a core antenna 3, a connector 4, and a PCB assembly board 5. The combined upper cover 1 and the metal lower cover 2 form the antenna housing. A waterproof rubber ring 6 is provided on the inner wall of the antenna housing. The metal lower cover 2 is fixedly connected to the PCB assembly board 5 at the top and the connector 4 is provided at the bottom. The PCB assembly board 5 is fixedly connected to the core antenna 3. A shunt strip structure 7 is embedded in the combined upper cover 1.

[0016] like Figure 1 and Figure 2As shown, the combined cover 1 includes an upper cover body 9 and a lower cover body 10, the shunt bar structure 7 is connected and communicated with the middle top metal protrusion 11 of the upper cover body 9, the lower cover body 10 cooperates with the upper cover body 9 to limit and fix the shunt bar structure 7, the inner wall of the upper cover body 9 is provided with a groove matched with the shunt bar structure, and the flow guide column 12 is formed on the outer wall of the upper cover body 9.

[0017] As shown in Figure 1 , the shunt bar structure 7 is composed of a plurality of conductive arms 8 and support arms 14 from top to bottom, the shunt bar structure 7 is connected and communicated with each other at the center of the combined cover 1, and the shunt bar structure 7 is directly connected and communicated with the metal lower cover 2 after bypassing the PCB assembly plate 5 from the outer side of the PCB assembly plate 5.

[0018] As shown in Figure 2 , the conductive arms 8 and the support arms 14 are connected by the bending part 13 and the shunt bar structure 7 is formed as a whole in the shape of a curved hook, and the position of the bending part 13 cooperates with the PCB assembly plate 5 in the horizontal plane, and the height of the conductive arm 8 from the middle top metal protrusion 11 of the upper cover body 9 to the ground is required to be higher than the radiation surface of the antenna and the ground surface.

[0019] As shown in Figure 1 , Figure 2 , and Figure 3 , the shunt bar structure 7 is uniformly distributed around the center of the middle top metal protrusion 11 of the upper cover body 9; the metal protrusion 11 is integrally formed with the shunt bar structure 7.

[0020] The above is only a preferred embodiment of the present application, not any form of limitation on the present application, although the present application has been disclosed as above with a preferred embodiment, however, it is not intended to limit the present application, any person skilled in the art, without departing from the scope of the technical solution of the present application, can make some changes or modifications to the above disclosed technical content to make equivalent embodiments with equivalent changes, but as long as it does not deviate from the technical solution of the present application, any modification, equivalent change and modification of the above embodiment according to the technical essence of the present application, all still belong to the scope of the technical solution of the present application.

Claims

1. An antenna lightning protection structure, comprising a combined upper cover (1), a metal lower cover (2), a core antenna (3), a connector (4), and a PCB assembly board (5), characterized in that... The combined upper cover (1) and the metal lower cover (2) form the antenna housing. The metal lower cover (2) is fixedly connected to the PCB assembly board (5) at the top and a connector (4) is provided at the bottom of the metal lower cover (2). The PCB assembly board (5) is fixedly connected to the core antenna (3). The combined upper cover (1) is provided with a shunt strip structure (7). The diversion bar structure (7) is composed of multiple conductive arms (8) and support arms (14) arranged from top to bottom. The diversion bar structure (7) is interconnected at the center of the combined upper cover (1). The diversion bar structure (7) runs from top to bottom, bypasses the PCB assembly board (5) from the outside, and then directly connects to the metal lower cover (2). The conductive arm (8) and the support arm (14) are connected by a bend (13) to make the diversion bar structure (7) as a whole form a curved hook shape, and the position of the bend (13) is in sync with the PCB assembly board (5) on the horizontal plane; The PCB assembly board (5) is provided with an opening corresponding to the shape of the bend (13), so that the diversion strip structure (7) passes through the opening and bypasses it.

2. The antenna lightning protection structure according to claim 1, characterized in that... The combined top cover (1) includes an upper cover body (9) and a lower cover body (10). The diversion strip structure (7) is connected to the metal protrusion (11) at the top middle of the upper cover body (9). The lower cover body (10) cooperates with the upper cover body (9) to limit and fix the diversion strip structure (7).

3. The antenna lightning protection structure according to claim 1, characterized in that... The diversion strip structure (7) is evenly distributed around the circumference with the top metal protrusion (11) in the middle of the cover (9) as the center.

4. The antenna lightning protection structure according to claim 1, characterized in that... The conductive arm (8) is required to be at a height higher than the antenna's radiating surface and ground plane from the metal protrusion (11) at the top center of the upper cover (9) to the ground.

5. The antenna lightning protection structure according to claim 2, characterized in that... The metal protrusion (11) is integrally formed with the flow divider structure (7).

6. The antenna lightning protection structure according to claim 1, characterized in that... A waterproof gasket (6) is provided on the inner wall of the antenna housing.

7. The antenna lightning protection structure according to claim 2, characterized in that... The inner wall of the upper cover (9) is provided with a groove that cooperates with the diversion strip structure, and a guide column (12) is formed on the outer wall of the upper cover (9).

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