An antenna filter integrated structure

Abstract

This invention discloses an integrated antenna filter structure, including a reflector, a filter, several power dividers, and several antenna elements. The reflector has a sandwich structure consisting of a base plate and a panel, with several first partitions spaced apart within the sandwich to divide it into several shielded cavities. The power dividers are disposed within the shielded cavities. The antenna elements are positioned above the panel and connected to the power dividers. The filter includes a cavity connected to the base plate, a cover plate covering the cavity, a resonant component disposed within the cavity, and a tuning component disposed on the cavity and / or the cover plate and opposite to the resonant component. The resonant component is connected to the power dividers via a feeding component. By setting the reflector as a double-layer structure and forming shielded cavities to accommodate the power dividers, not only is the structural strength of the reflector improved, allowing the mounting base to be directly connected to the reflector, but the power dividers and antenna elements are also shielded, thereby enhancing antenna gain.

Description

Technical Field

[0001] This invention relates to the field of antenna and filter integration. Background Technology

[0002] The 5G base station antenna filter integrated unit (AFU) is an important device for 5G integrated active base stations (AAU). Through the integrated design of the antenna and filter, it radiates and receives electromagnetic waves while simultaneously selecting specific frequencies for radio frequency signals to achieve precise wireless coverage for 5G communication systems. However, existing AFUs have the following drawbacks:

[0003] 1. The Afu has a relatively high cross-sectional dimension and the AAU has a large lateral windward area, which places high demands on the structural strength of the mounting bracket;

[0004] 2. Afu is relatively heavy, which places high demands on the structural strength of the mounting bracket.

[0005] 3. Afu has a high cost. Because the filter adopts a cavity structure and has a large projected area, the mold cost is high and the mold opening cycle is long. If the filter adopts a coaxial cavity structure, the number of resonators is large and the assembly time is long, resulting in high production cost.

[0006] 4. The lack of shielding between the antenna power divider board and the antenna element affects the antenna gain. Summary of the Invention

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an integrated antenna filter structure.

[0008] One embodiment of the present invention provides a technical solution to solve its technical problem: an integrated antenna filter structure, comprising a reflector, a filter, several power dividers, and several antenna elements;

[0009] The reflector is provided with a sandwich layer consisting of a base plate and a panel, and a number of first partitions are provided at intervals within the sandwich layer so that the sandwich layer is divided into a number of shielding cavities.

[0010] The power divider is installed inside the shielding cavity;

[0011] The antenna element is positioned above the panel and connected to the power divider board;

[0012] The filter includes a cavity connected to a base plate, a cover plate covering the cavity, a resonant component disposed in the cavity, and a tuning component disposed in the cavity and / or the cover plate and opposite to the resonant component. The resonant component is connected to the power divider board through a power supply component.

[0013] Furthermore, the first partition plate is provided with a rib extending into the shielding cavity, and the mounting base and / or resonant assembly are connected to the rib via a connecting assembly.

[0014] Furthermore, there is a gap between the rib and the panel to form a first slot for the power distribution board to be inserted.

[0015] Furthermore, the connecting components are configured as bolted connections.

[0016] Furthermore, the cavity is formed by a bottom plate and side plates, with the side plates welded to the bottom plate.

[0017] Furthermore, the resonant assembly includes a second partition and a resonant plate connected to the second partition, and a plurality of second slots are provided in the cavity, with the second partition inserted into the second slots.

[0018] Furthermore, the power supply assembly includes a shielding ring, an insulating medium disposed within the shielding ring, and a metal pin inserted into the insulating medium. The shielding ring passes through the base plate, and the two ends of the metal pin are connected to the power divider board and the resonant assembly, respectively.

[0019] Furthermore, the cavity is equipped with several low-pass components that are connected to the resonant components.

[0020] Furthermore, the low-pass component includes:

[0021] A low-pass filter, one end of which is connected to a resonant component;

[0022] Connector medium, used for connection to the cavity;

[0023] The connector socket connects to the connector medium and the other end of the low-pass filter, respectively.

[0024] A low-pass cover plate is installed on the connector housing;

[0025] The connector connects to the low-pass cover and the connector pins are inserted into the connector socket.

[0026] Furthermore, the panel is provided with several third partitions to separate several cavities, and the antenna vibrator is placed inside the cavities.

[0027] The beneficial effects of this invention are as follows: An integrated antenna filter structure includes a reflector, a filter, several power dividers, and several antenna elements. The reflector has a sandwich structure consisting of a base plate and a panel, with several first partitions spaced apart within the sandwich structure to divide it into several shielded cavities. The power dividers are disposed within the shielded cavities. The antenna elements are disposed above the panel and connected to the power dividers. The filter includes a cavity connected to the base plate, a cover plate covering the cavity, a resonant component disposed within the cavity, and a tuning component disposed on the cavity and / or the cover plate and opposite to the resonant component. The resonant component is connected to the power dividers via a feeding component. By setting the reflector to a double-layer structure and forming a shielded cavity to accommodate the power dividers, not only is the structural strength of the reflector improved, allowing the mounting base to be directly connected to the reflector, but the power dividers and antenna elements are also shielded, thereby enhancing antenna gain. Attached Figure Description

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 A schematic diagram of the first structure of an integrated antenna filter structure;

[0030] Figure 2 This is a schematic diagram of the second structure of an integrated antenna filter structure;

[0031] Figure 3 An exploded view of an integrated antenna filter structure;

[0032] Figure 4 for Figure 3 A magnified view of a portion of region A in the middle;

[0033] Figure 5 This is a first cross-sectional view of an integrated antenna filter structure;

[0034] Figure 6 for Figure 5 A magnified view of a portion of region B in the middle;

[0035] Figure 7 This is a partial structural diagram of an integrated antenna filter structure;

[0036] Figure 8 for Figure 7 A magnified view of a portion of region C in the middle;

[0037] Figure 9 This is a schematic diagram of the resonant component;

[0038] Figure 10 This is a second cross-sectional view of an integrated antenna filter structure;

[0039] Figure 11 for Figure 10 A magnified view of a portion of region D. Detailed Implementation

[0040] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0041] In the description of this invention, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0042] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0043] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0044] Reference Figures 1 to 11 An integrated antenna filter structure includes a reflector 10, a filter 20, several power dividers 30, and several antenna elements 40.

[0045] The reflector 10 is provided with a sandwich layer consisting of a base plate 11 and a panel 12. Several first partitions 13 are provided at intervals in the sandwich layer so that the sandwich layer is divided into several shielding cavities 14.

[0046] The power distribution board 30 is disposed inside the shielding cavity 14;

[0047] The antenna element 40 is positioned above the panel 12 and connected to the power divider board 30;

[0048] The filter 20 includes a cavity 21 connected to the base plate 11, a cover plate 22 covering the cavity 21, a resonant component 23 disposed in the cavity 21, and a tuning component 24 disposed on the cavity 21 and / or the cover plate 22 and opposite to the resonant component 23. The resonant component 23 is connected to the power divider board 30 through the power supply component 50.

[0049] In this invention: 1. A power divider board 30 is inserted into the shielding cavity 14 of the reflector 10. Specifically, the power divider board 30 is inserted into the first slot 15 and fixed together with the panel 12 of the reflector 10 by a fixing structure. The fixing structure is preferably a plastic rivet. The plastic rivet passes through the panel 12 from the top of the reflector 10 and is riveted together with the power divider board 30. Pins connected to the welding holes of the power divider board 30 are processed on the side of the reflector 10 near the antenna vibrator 40. The antenna vibrator 40 is welded to the power divider board 30 by welding.

[0050] 2. The resonant plate 232 is welded to the second partition plate 231 as a first embodiment of connecting the resonant component 23 to the cavity 21. A second slot 233 is opened on the cavity 21, and the second partition plate 231 is inserted into the second slot 233. As a second embodiment of connecting the resonant component 23 to the cavity 21, a threaded hole can be opened on the partition 60, and a through hole can be opened on the base plate 11 and the resonant plate 232 or the second partition plate 231. Bolts are inserted into the through holes and threaded into the threaded holes on the partition 60.

[0051] 3. Weld one end of the low-pass filter 81 to the resonant plate 232, and connect the other end to the connector base 83. Assemble the low-pass assembly 80 in sequence, and finally cover it with the low-pass cover plate 84 and cover plate 22. The connection between the low-pass cover plate 84 and cover plate 22 and the cavity 21 can be made by welding. Then use the tuning assembly 24 to adjust the resonant frequency. The tuning assembly 24 is preferably a tuning screw.

[0052] 4. Preferably, the reflector 10 is made of aluminum profile stretching and has a double-layer structure, which has the following advantages: ① It can improve the structural strength of the reflector 10, so that the reflector 10 has sufficient structural strength, so that the reflector 10 can be used as the bottom connecting plate of the cavity 21, thereby forming the cavity 21 together with the side plate 211; and the mounting base 61 can be directly connected to the reflector 10, and then the mounting base 61 can be connected to the equipment. The mounting base 61 can be directly welded to the bottom plate 11 on the reflector 10, or threaded holes can be opened on the partition 60, and through holes can be opened on the bottom plate 11 and the mounting base 61, and bolts can be inserted into the through holes and threaded into the threaded holes on the partition 60; ② It can also form a shielding cavity 14 in the reflector 10. By setting the power divider 30 in the shielding cavity 14, the power divider 30 can be shielded from the antenna vibrator 40 to enhance the antenna gain;

[0053] 5. Reference Figure 3 , 4 5, 6, Multiple third partitions 90 can be provided on the reflector 10, thereby creating several cavities 91 spaced apart on the panel 12, so that the antenna elements 40 connected to different power dividers 30 are isolated from each other. Preferably, the third partitions 90 are integrally formed with the reflector 10.

[0054] 6. Reference Figure 2 , 3 4, 7, The cavity 21 of the filter 20 is formed by stretching aluminum profile. Specifically, the side plate 211 on the cavity 21 is formed by stretching aluminum profile, and the bottom plate 11 on the reflector 10 is used as the bottom connecting plate of the cavity 21 to form a sealed half cavity.

[0055] 7. Reference Figure 8 In the prefabrication stage, the resonant plate 232 and the second partition plate 231 are welded together by laser welding, solder paste welding or other processes. Then, the second partition plate 231 is inserted into the second slot 233 on the cavity 21, and solder paste is evenly applied to the joint between the second slot 233 and the bottom of the second partition plate 231 and the reflector plate 21 to form a sealed semi-open cavity.

[0056] 8. Reference Figure 6 A hole is made on the base plate 11 of the reflector 10, and the shielding ring 51 on the power supply component 50 is fully welded to the hole on the base plate 11. Then, the plastic dielectric 52 and the metal pin 53 are inserted. Then, one end of the metal pin 53 is welded to the power divider board 30 and the other end is welded to the resonant component 23. The ground of the power divider board 30 and the shielding ring 51 are also spot welded at the same time.

[0057] 9. Reference Figure 10-11 The low-pass filter 81 is preferably made of sheet metal and one end is welded to the resonant plate 232. The other end of the low-pass filter 81 is welded to the connector seat 83. The connector medium 82 is screwed onto the cavity 21 through a threaded connection structure. The connector seat 83 is provided with threads and is screwed onto the connector medium 82. Finally, the low-pass cover plate 84 is fully soldered and the connector 85 is screwed onto the low-pass cover plate 84. The connector pin is simultaneously inserted into the opening petal of the connector seat 83.

[0058] 10. The circuit path of the AFU is: antenna vibrator 40 - power divider board 30 - feed assembly 50 - resonant plate assembly 23 - low-pass filter 81 - connector socket 83 - connector 85 - output terminal.

[0059] 11. The advantages of this invention are as follows: ① The cavity 21 of the filter 20 is made of aluminum profile stretching process, and the reflector 10 is used as the bottom connecting plate of the cavity 21, so that the cavity 21 does not need an additional bottom plate structure, which can reduce the cross-sectional height of the AFU, and also reduce the mold opening and processing cost and material cost of the cavity 21; ② The resonant plate 232 of the filter 20 is prefabricated and welded together with the second partition plate 231, and a second slot 233 is set on the cavity 21 to fix its position, which can simplify the structure of the filter and improve the assembly efficiency; ③ The reflector 10 adopts an aluminum alloy double-layer profile structure, and a first slot 15 for limiting the power divider 30 is set in the interlayer, which can shield the power divider 30 from the antenna vibrator 40 to enhance the antenna gain; ④ The shielding ring 51 of the feed assembly 50 and the bottom plate 11 of the reflector 20 are fully welded through the opening, which can solve the electromagnetic leakage problem of the feed assembly 50.

[0060] The first partition plate 13 is provided with a rib 60 extending into the shielding cavity 14. The mounting base 61 and / or the resonant component 23 are connected to the rib 60 through the connecting component 70. In this embodiment, the rib 60 has two functions: first, it forms a first slot 15 with the panel 12 to limit the power distribution plate 30; second, threaded holes can be opened on the rib 60 so that the mounting base 61 and / or the resonant component 23 can be connected to the rib 60 through a bolt connection structure.

[0061] There is a gap between the rib 60 and the panel 12 to form a first slot 15 for the power distribution board 30 to be inserted.

[0062] The connecting component 70 is configured as a bolted connection structure.

[0063] The cavity 21 is formed by a base plate 11 and a side plate 211, with the side plate 211 welded to the base plate 11.

[0064] The resonant assembly 23 includes a second partition 231 and a resonant plate 232 connected to the second partition 231. A plurality of second slots 233 are provided in the cavity 21, and the second partition 231 is inserted into the second slots 233.

[0065] The power supply assembly 50 includes a shielding ring 51, an insulating medium 52 disposed within the shielding ring 51, and a metal pin 53 inserted within the insulating medium 52. The shielding ring 51 passes through the base plate 11, and the two ends of the metal pin 53 are respectively connected to the power divider board 30 and the resonant assembly 23.

[0066] The cavity 21 is provided with several low-pass components 80 connected to the resonant component 23.

[0067] Low-pass component 80 includes:

[0068] A low-pass filter 81 is connected at one end to a resonant component 23;

[0069] Connector medium 82 is connected to cavity 21;

[0070] Connector socket 83 is connected to connector medium 82 and the other end of low-pass filter 81, respectively;

[0071] A low-pass cover 84 is installed on the connector base 83;

[0072] Connector 85 is connected to low-pass cover 84 and connector pins are inserted into connector socket 83.

[0073] The panel 12 is provided with several third partitions 90 to separate several cavities 91, and the antenna vibrator 40 is disposed in the cavity 91.

[0074] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. An integrated antenna filter structure, characterized in that: It includes a reflector (10), a filter (20), several power dividers (30), and several antenna elements (40); The reflector (10) is provided with a sandwich layer consisting of a base plate (11) and a panel (12), and a plurality of first partitions (13) are provided in the sandwich layer at intervals so that the sandwich layer is divided into a plurality of shielding cavities (14). The power distribution board (30) is disposed inside the shielding cavity (14); The antenna vibrator (40) is disposed above the panel (12) and connected to the power divider board (30); The filter (20) includes a cavity (21) connected to the base plate (11), a cover plate (22) covering the cavity (21), a resonant component (23) disposed in the cavity (21), and a tuning component (24) disposed on the cavity (21) and / or the cover plate (22) and opposite to the resonant component (23). The resonant component (23) is connected to the power divider board (30) through a power supply component (50). The first partition (13) is provided with a rib (60) extending into the shielding cavity (14). The mounting base (61) and / or the resonant component (23) are connected to the rib (60) through the connecting component (70). The rib (60) and the panel (12) have a gap to form a first slot (15) into which the power divider board (30) can be inserted. The resonant assembly (23) includes a second partition (231) and a resonant plate (232) connected to the second partition (231). The cavity (21) is provided with a plurality of second slots (233), and the second partition (231) is inserted into the second slots (233). The power supply assembly (50) includes a shielding ring (51), an insulating medium (52) disposed within the shielding ring (51), and a metal pin (53) inserted into the insulating medium (52). The shielding ring (51) passes through the base plate (11), and the two ends of the metal pin (53) are respectively connected to the power divider board (30) and the resonant assembly (23). The panel (12) is provided with a number of third partitions (90) to separate a number of cavities (91), and the antenna vibrator (40) is disposed in the cavity (91).

2. The integrated antenna filter structure according to claim 1, characterized in that: The connecting component (70) is configured as a bolted connection structure.

3. The integrated antenna filter structure according to claim 1, characterized in that: The cavity (21) is formed by the bottom plate (11) and the side plate (211), and the side plate (211) is welded to the bottom plate (11).

4. The integrated antenna filter structure according to claim 1, characterized in that: The cavity (21) is provided with a plurality of low-pass components (80) connected to the resonant component (23).

5. The integrated antenna filter structure according to claim 4, characterized in that, The low-pass component (80) includes: A low-pass filter (81) is connected at one end to the resonant component (23); Connector medium (82) is connected to the cavity (21); The connector socket (83) is connected to the other end of the connector medium (82) and the low-pass filter (81), respectively; A low-pass cover (84) is provided on the connector seat (83); The connector (85) is connected to the low-pass cover (84) and the connector pins are inserted into the connector seat (83).

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