Oscillator structure and base station antenna

Abstract

The invention discloses an oscillator structure and a base station antenna. The oscillator structure comprises a reflecting plate and two groups of oscillator bodies, each oscillator body comprises a feeder circuit board, a radiation sheet and a buckling part, the two groups of feeder circuit boards are mounted on the same side of the reflecting plate and are arranged in a crossed manner, the radiation sheet is a metal sheet, and the buckling part is arranged on the radiation sheet and can buckle the radiation sheet on the feeder circuit board in the same group. According to the scheme, the dipole antenna adopts a circuit board feeder mode, electric signals are coupled to the radiation sheet, and the advantage that the frequency band of the dipole antenna is wide is effectively utilized. Meanwhile, the radiation sheet can be formed by stamping a relatively thin metal sheet, so that the weight of the oscillator is greatly reduced, a good intermodulation index is achieved, mold opening is not needed, the cost is reduced, and the main advantages of a metal plate stamping process, a PCB feeder line and a dipole antenna are integrated.

Description

Technical Field

[0001] The present invention relates to the technical field of base station antennas, and in particular to a vibrator structure and a base station antenna. Background Art

[0002] Existing narrow-spacing broadband antennas generally use dipole elements in order to widen the frequency band.

[0003] Publication No. CN204947071U discloses a dipole antenna element, whose radiation frame can achieve the electrical performance and matching value change effect required by the dipole antenna element through a matching unit provided on a coupling arm, thereby reducing the assembly complexity of the dipole antenna element and effectively reducing its assembly cost, while improving the antenna stability and achieving both practical advancement and better industrial economic benefits.

[0004] However, conventional dipole oscillators are generally made in two forms: die-casting and PCB (printed circuit board). Die-cast dipole oscillators are made of metal in one piece, with fewer solder joints and relatively good intermodulation indicators, but the weight is inevitably too large; the industry generally changes metal to plastic and then electroplates the metal. The performance is consistent with that of a simple metal die-cast oscillator, and the weight of the antenna is greatly reduced. However, the plastic structure requires mold opening, which is costly, and the mold cannot be changed after it is made, which is not conducive to the replacement of antenna versions. PCB dipole oscillators have better performance and are not expensive, but they require multiple solder joints for fixing and connection, and the intermodulation indicators are difficult to meet. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and propose an oscillator structure to solve the technical problem that the dipole oscillator in the prior art is difficult to balance weight reduction, cost savings and good intermodulation indicators.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides an oscillator structure, comprising: reflectors; and Two groups of vibrator bodies, each of which includes a feeder circuit board, a radiation sheet and a buckling portion. The two groups of feeder circuit boards are installed on the same side of the reflector and are arranged crosswise. The radiation sheet is a metal sheet. The buckling portion is provided on the radiation sheet and can buckle the radiation sheet to the feeder circuit board of the same group.

[0007] In some embodiments, the buckling portion includes a connecting plate and a buckling plate, one end of the connecting plate is connected to the radiation sheet, the buckling plate is mounted on the connecting plate, and is spaced apart from the radiation sheet to form a buckling groove; The feeder circuit board is clamped in the buckling slot of the same group.

[0008] In some embodiments, two connecting plates are provided, and the two connecting plates are spaced apart from each other. Two snap-fit ​​plates are provided, and the two snap-fit ​​plates are respectively installed on the two connecting plates, and each snap-fit ​​plate is located on one side of the connecting plate close to the other connecting plate.

[0009] In some embodiments, the radiation sheet includes a radiation body and a mounting sheet, and the radiation body is connected to the mounting sheet at an angle; The connecting plate is connected to the mounting piece, the buckling plate is spaced apart from the mounting piece, and is enclosed with the mounting piece to form the buckling groove.

[0010] In some embodiments, the radiation sheet further includes a plurality of extension sheets, which are installed on the periphery of the radiation body and are arranged at intervals along the circumference of the radiation body and are located on the same side of the radiation body as the installation sheet.

[0011] In some embodiments, the radiation sheet is formed into the radiation body, the mounting sheet, the connecting plate and the buckle plate by stamping and bending, and the radiation body is provided with notches corresponding to the connecting plate and the buckle plate.

[0012] In some embodiments, the radiation sheet includes two radiation monomers, each group of the buckling parts is provided with two, the two buckling parts in the same group are respectively provided on the two radiation monomers, and the two radiation monomers can be buckled at intervals on the feeder circuit board in the same group; The two groups of radiation units are arranged alternately in sequence along the circumferential direction of the two feeder circuit boards.

[0013] In some embodiments, one of the two feeder circuit boards is provided with a slot for the other feeder circuit board to extend into, and the other feeder circuit board is provided with an avoidance groove, and the avoidance groove is connected to the slot.

[0014] In some embodiments, each of the feeder circuit boards is provided with a plug-in board extending toward the reflective plate, and the reflective plate is provided with a slot for the plug-in board to be inserted.

[0015] In a second aspect, the present invention further provides a base station antenna, which comprises the oscillator structure as described in any one of the above items.

[0016] Compared with the prior art, the vibrator structure provided by the present invention is assembled by fastening the radiation plate to the feeder circuit board of the same group through the snap-fit ​​part, and then the two feeder circuit boards are cross-laid on the reflector and welded, thereby reducing solder joints and thus reducing the assembly process of redundant fixings. And as a dipole antenna, the electrical signal is coupled to the radiation plate in the form of a circuit board feeder, which effectively utilizes the advantage of the wider frequency band of the dipole antenna. At the same time, the radiation plate can be stamped and formed by a thinner metal sheet, which greatly reduces the weight of the vibrator and has good intermodulation indicators, and does not require mold opening, thereby reducing costs, and integrating the main advantages of sheet metal stamping technology, PCB feeder and dipole antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of an oscillator structure provided by an embodiment of the present invention; Figure 2 yes Figure 1 Exploded view of the oscillator structure; Figure 3 yes Figure 2 A schematic diagram of a set of vibrator bodies; Figure 4 yes Figure 2 Schematic diagram of another set of vibrator bodies; Figure 5 yes Figure 4 An exploded view of the oscillator body; Figure 6 yes Figure 1 Another exploded view of the oscillator structure; Figure 7 yes Figure 6 Schematic diagram of the oscillator structure from another angle; Figure 8 yes Figure 1 A top view of the two groups of radiation sheets; Fig. 9 yes Figure 5 Schematic diagram of the radiator.

[0018] Description of reference numerals: 1. Reflection plate; 1a. Slot; 2. Vibrator body; 21. Feeder circuit board; 21a. Card slot; 21b. Avoidance slot; 211. Plug-in board; 22. Radiating sheet; 22a. Notch; 221. Radiating body; 222. Mounting sheet; 223. Extension sheet; 224. Radiating unit; 23. Snap-fit ​​part; 231. Connecting plate; 232. Snap-fit ​​plate; 232a. Snap-fit ​​slot. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In order to solve the technical problem that the dipole oscillator in the prior art is difficult to take into account weight reduction, cost savings and good intermodulation indicators at the same time, the present invention provides a oscillator structure, which can reduce the weight of the oscillator and has good intermodulation indicators, and does not require mold opening, thereby reducing costs, and integrates the main advantages of sheet metal stamping technology, PCB feeder and dipole antenna.

[0021] It should be noted that the vibrator structure described in the present invention is used for but not limited to base station antennas, etc. For the convenience of explanation, in the present invention, only the application of the vibrator structure to the base station antenna is used as an example for explanation. The principle of applying the vibrator structure to other types of equipment is essentially the same as the principle applied to the base station antenna, and will not be repeated here.

[0022] See also Figures 1 to 5 , Figures 1 to 5 It is a structural schematic diagram of an oscillator structure in an embodiment of the present invention. The oscillator structure includes a reflector 1 and two groups of oscillator bodies 2; each oscillator body 2 includes a feeder circuit board 21, a radiation sheet 22 and a buckling portion 23. The two groups of feeder circuit boards 21 are installed on the same side of the reflector 1 and are arranged crosswise. The radiation sheet 22 is a metal sheet. The buckling portion 23 is provided on the radiation sheet 22 and can buckle the radiation sheet 22 to the feeder circuit board 21 of the same group.

[0023] When assembling the vibrator structure provided by the present invention, the radiation plate 22 is buckled onto the feeder circuit board 21 of the same group through the buckle part 23, and then the two feeder circuit boards 21 are cross-arranged on the reflector 1 and welded, thereby reducing solder joints and further reducing the assembly process of redundant fixings. And as a dipole antenna, the electrical signal is coupled to the radiation plate 22 in the form of a circuit board feeder, which effectively utilizes the advantage of the wider frequency band of the dipole antenna. At the same time, the radiation plate 22 can be formed by stamping a thinner metal sheet, which greatly reduces the weight of the vibrator and has good intermodulation indicators, and does not require mold opening, thereby reducing costs, and integrating the main advantages of sheet metal stamping technology, PCB feeder and dipole antenna.

[0024] It should be noted that the specific structure of the buckle portion 23 is not limited, as long as the radiation sheet 22 can be buckled on the feeder circuit board 21. In one embodiment, the buckle portion 23 is configured in the form of a buckle, and a slot for the buckle to be buckled is correspondingly provided on the feeder circuit board 21. In another embodiment, the buckle portion 23 is configured as a slot on the radiation sheet 22, and a buckle is provided on the feeder circuit board 21.

[0025] In another embodiment, see Figure 5 The snap-fitting portion 23 includes a connecting plate 231 and a snap-fitting plate 232. One end of the connecting plate 231 is connected to the radiation sheet 22. The snap-fitting plate 232 is installed on the connecting plate 231 and is spaced apart from the radiation sheet 22 to form a snap-fitting groove 232a. The feeder circuit board 21 is clamped in the snap-fitting groove 232a of the same group.

[0026] In this embodiment, the buckling portion 23 is configured in the form of a connecting plate 231 and a buckling plate 232, and a buckling groove 232a is formed by the buckling plate 232 and the radiation sheet 22, so that the feeder circuit board 21 is clamped in the buckling groove 232a, and the radiation sheet 22 is stably installed on the feeder circuit board 21. It should be noted that in this solution, the radiation sheet 22, the connecting plate 231 and the buckling plate 232 are integrally die-cast.

[0027] In one embodiment, two connecting plates 231 are provided, and the two connecting plates 231 are arranged at intervals. Two snap-fit ​​plates 232 are provided, and the two snap-fit ​​plates 232 are respectively installed on the two connecting plates 231 , and each snap-fit ​​plate 232 is located on one side of the connecting plate 231 close to the other connecting plate 231 .

[0028] In this embodiment, two groups of connecting plates 231 and buckling plates 232 are arranged at intervals, so that the feeder circuit board 21 is clamped in the two groups of buckling grooves 232a, further improving the installation stability of the radiation sheet 22 on the feeder circuit board 21. It should be noted that in one embodiment, more groups of connecting plates 231 and buckling plates 232 can be provided, which can be increased or decreased according to specific needs.

[0029] In one embodiment, see Figures 4 to 7 The radiation sheet 22 includes a radiation body 221 and a mounting sheet 222, the radiation body 221 and the mounting sheet 222 are connected at an angle; the connecting plate 231 is connected to the mounting sheet 222, the buckling plate 232 is spaced apart from the mounting sheet 222, and is enclosed with the mounting sheet 222 to form a buckling groove 232a.

[0030] In this embodiment, the feeder circuit board 21 is affixed between the snap-fit ​​plate 232 and the mounting plate 222. On the one hand, the mounting plate 222 can be stably abutted against the feeder circuit board 21 to increase the contact area; on the other hand, the radiation body 221 can be covered on one side of the feeder circuit board 21 to ensure the radiation capability.

[0031] In one embodiment, the radiation sheet 22 further includes a plurality of extension sheets 223 , which are installed on the periphery of the radiation body 221 , arranged at intervals along the circumference of the radiation body 221 , and located on the same side of the radiation body 221 as the installation sheet 222 .

[0032] In this embodiment, a plurality of extension pieces 223 are arranged at intervals around the circumference of the radiation body 221 to further improve the coupling capability of the radiation piece 22 to electrical signals. It should be noted that the specific number of the extension pieces 223 is not limited. Specifically, in this solution, three extension pieces 223 are arranged on each radiation unit 224.

[0033] In one embodiment, see Figure 8 The radiation sheet 22 is formed into a radiation body 221, a mounting sheet 222, a connecting plate 231 and a buckling plate 232 by stamping and bending, and a notch 22a corresponding to the connecting plate 231 and the buckling plate 232 is left on the radiation body 221.

[0034] In this embodiment, the radiation sheet 22 is integrally stamped and formed, which is convenient for production and reduces the weight of the radiation sheet 22 as much as possible. At the same time, it is possible to observe through the notch 22a whether the radiation sheet 22 is installed in place on the feeder circuit board 21, thereby improving the convenience of assembly. In addition, the notch 22a can also change the radiation characteristics of the antenna and affect its radiation performance.

[0035] In one embodiment, see Fig. 9 The radiation sheet 22 includes two radiation monomers 224, each group of snap-fitting portions 23 is provided with two, the two snap-fitting portions 23 in the same group are respectively provided on the two radiation monomers 224, and the two radiation monomers 224 can be snap-fitted to the feeder circuit board 21 in the same group at intervals; wherein, the radiation monomers 224 of the two groups are alternately arranged in sequence along the circumferential direction of the two feeder circuit boards 21.

[0036] In this embodiment, each radiation sheet 22 is configured as two radiation monomers 224, and the two groups of radiation monomers 224 are alternately arranged along the circumference of the two feeder circuit boards 21, so that the signal transmission is more uniform. At the same time, a buckle 23 is provided on each radiation monomer 224 to ensure that the radiation monomer 224 is stably installed on the feeder circuit board 21.

[0037] In one embodiment, one of the two feeder circuit boards 21 is provided with a slot 21 a for the other feeder circuit board 21 to extend into, and the other feeder circuit board 21 is provided with an avoidance slot 21 b, and the avoidance slot 21 b is connected to the slot 21 a.

[0038] In this embodiment, a card slot 21a is set on one feeder circuit board 21, and an avoidance slot 21b is set on the other feeder circuit board 21, so that the two feeder circuit boards 21 are arranged alternately and the end of the feeder circuit board 21 away from the reflector 1 is ensured to be flush, thereby improving the compactness of the structure and making assembly relatively convenient.

[0039] In one embodiment, each feeder circuit board 21 is provided with a plug-in board 211 extending toward the reflector 1 , and the reflector 1 is provided with a slot 1 a for the plug-in board 211 to be inserted.

[0040] In this embodiment, the feeder circuit board 21 is inserted into the slot 1a of the reflector 1 through the plug-in board 211, so that the feeder circuit board 21 and the reflector 1 are positioned when the feeder circuit board 21 is assembled, and then the plug-in board 211 of the feeder circuit board 21 is welded to the reflector 1. It should be noted that two plug-in boards 211 are provided at intervals on each feeder circuit board 21, and correspondingly, four slots 1a are provided on the reflector 1. In addition, the reflector 1 can also be made by die-casting of metal sheets, and in this solution, the reflector 1 includes a bottom plate and a surrounding plate, which is installed on one side of the bottom plate where the vibrator body 2 is provided, and a avoidance opening is provided corresponding to the vibrator body.

[0041] In addition, the present invention also provides a base station antenna, which includes a vibrator structure as described in any one of the above items. It should be noted that the detailed structure of the vibrator structure of the base station antenna can refer to the embodiment of the above vibrator structure, which will not be repeated here; since the above vibrator structure is used in the base station antenna of the present invention, the embodiment of the base station antenna of the present invention includes all technical solutions of all embodiments of the above vibrator structure, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0042] In order to better understand the present invention, the following Figures 1 to 9 The technical solution of the present invention is described in detail: The oscillator structure consists of four radiating monomers 224 made by sheet metal stamping process, two feeder circuit boards 21 and a reflector 1. Specifically, the feeder circuit board 21 does not have a metal ground, only a line. And each radiating monomer 224 has a bend with a fixed buckle, that is, each radiating monomer 224 has a buckling groove 232a formed by a connecting plate 231 and a buckling plate 232. After the feeder circuit board 21 is inserted into the two radiating plates 22, they are cross-stacked together to form two polarizations, so that the oscillator integrates the main advantages of sheet metal stamping process, PCB feeder and dipole antenna.

[0043] Specifically, as a dipole antenna, a PCB feeder is used to couple the electrical signal to the radiation plate 22, effectively utilizing the advantage of the wider frequency band of the dipole antenna; the metal structures of the vibrator except the feeder are stamped out with thinner metal sheets, which greatly reduces the weight of the vibrator; when stamping the metal sheet of the radiation unit 224, a small bend is designed at an appropriate position, and the feeder circuit board 21 can be clamped and inserted into the reflector 1 for welding at the same time, reducing the assembly process of redundant fixings.

[0044] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A vibrator structure, characterized in that: include: reflectors; and Two groups of vibrator bodies, each of which includes a feeder circuit board, a radiation sheet and a buckling portion. The two groups of feeder circuit boards are installed on the same side of the reflector and are arranged crosswise. The radiation sheet is a metal sheet. The buckling portion is provided on the radiation sheet and can buckle the radiation sheet to the feeder circuit board of the same group.

2. The oscillator structure according to claim 1, characterized in that: The buckling part includes a connecting plate and a buckling plate, one end of the connecting plate is connected to the radiation sheet, the buckling plate is installed on the connecting plate and is spaced apart from the radiation sheet to form a buckling groove; The feeder circuit board is clamped in the buckling slot of the same group.

3. The oscillator structure according to claim 2, characterized in that: There are two connecting plates, which are spaced apart from each other. There are two buckling plates, which are respectively mounted on the two connecting plates. Each buckling plate is located on one side of the connecting plate close to the other connecting plate.

4. The oscillator structure according to claim 2, characterized in that: The radiation sheet comprises a radiation body and a mounting sheet, wherein the radiation body is connected to the mounting sheet at an angle; The connecting plate is connected to the mounting piece, the buckling plate is spaced apart from the mounting piece, and is enclosed with the mounting piece to form the buckling groove.

5. The oscillator structure according to claim 4, characterized in that: The radiation sheet further comprises a plurality of extension sheets, which are mounted on the periphery of the radiation body and arranged at intervals along the circumference of the radiation body and are located on the same side of the radiation body as the installation sheet.

6. The oscillator structure according to claim 4, characterized in that: The radiation sheet is formed into the radiation body, the installation sheet, the connection plate and the buckle plate by punching and bending, and the radiation body is provided with notches corresponding to the connection plate and the buckle plate.

7. The oscillator structure according to claim 1, characterized in that: The radiation sheet includes two radiation monomers, each group of the buckling parts is provided with two, the two buckling parts in the same group are respectively provided on the two radiation monomers, and the two radiation monomers can be buckled at intervals on the feeder circuit board in the same group; The two groups of radiation units are arranged alternately in sequence along the circumferential direction of the two feeder circuit boards.

8. The oscillator structure according to claim 1, characterized in that: One of the two feeder circuit boards is provided with a slot for the other feeder circuit board to extend into, and the other feeder circuit board is provided with an avoidance slot, and the avoidance slot is connected to the slot.

9. The oscillator structure according to claim 1, characterized in that: Each of the feeder circuit boards is provided with a plug-in board extending toward the reflecting plate, and the reflecting plate is provided with a slot for the plug-in board to be inserted.

10. A base station antenna, characterized in that: Comprising the oscillator structure as described in any one of claims 1-9.

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