Phase shifting device, base station antenna and base station antenna feeder system

Abstract

The utility model provides a phase shifting device, a base station antenna and a base station antenna feeder system, and the phase shifting device comprises a metal body, a first movable transmission line and a second movable transmission line. The metal body is provided with an input port and a plurality of output ports. In the thickness direction of the phase shifting device, the first movable transmission line and the second movable transmission line are movably arranged on the two sides of the metal body respectively, the first movable transmission line and the second movable transmission line are both in gap coupling with the metal body, and the projection of the first movable transmission line and the projection of the second movable transmission line coincide with at least part of the projection of the metal body. And the second movable transmission line is electrically connected with the first movable transmission line. In the application, the first movable transmission line and the second movable transmission line are directly and electrically connected, so that better electrical index consistency between the first movable transmission line and the second movable transmission line can be ensured. In addition, the impedance matching space can be maximized, and the electrical performance of the phase shifting device can be optimized to the maximum extent.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a phase shifting device, a base station antenna, and a base station antenna feed system. Background Art

[0002] Phase shifters are devices that can adjust the phase of waves and are widely used in antenna systems. Traditional phase shifters usually include a movable transmission line and a fixed transmission line. The movable transmission line is gap-coupled with the fixed transmission line and can move relative to the fixed transmission line to adjust the phase. However, there is no structural constraint between the movable transmission line and the fixed transmission line, which easily leads to poor structural stability between the movable transmission line and the fixed transmission line, affecting the consistency of electrical indicators. Utility Model Content

[0003] In view of this, the present application provides a phase shifting device, a base station antenna, and a base station antenna feed system to ensure the structural stability between the movable transmission line and the fixed transmission line and ensure the consistency of electrical indicators.

[0004] In a first aspect, an embodiment of the present application provides a phase shifting device, which includes a metal body, a first movable transmission line, and a second movable transmission line. The metal body is provided with an input port and a plurality of output ports. Along the thickness direction of the phase shifting device, the first movable transmission line is movably provided on one side of the metal body, the first movable transmission line is gap-coupled with the metal body, and the projection of the first movable transmission line overlaps with at least a portion of the projection of the metal body. Along the thickness direction of the phase shifting device, the second movable transmission line is movably provided on a side of the metal body away from the first movable transmission line, the second movable transmission line is gap-coupled with the metal body, and the projection of the second movable transmission line overlaps with at least a portion of the projection of the metal body; the second movable transmission line is electrically connected to the first movable transmission line.

[0005] In the present application, by directly electrically connecting the first movable transmission line and the second movable transmission line, it is possible to ensure better electrical index consistency between the first movable transmission line and the second movable transmission line. In addition, it is also possible to maximize the impedance matching space and maximize the electrical performance of the phase shifting device.

[0006] In a possible design, the phase shifting device further includes a metal connector, and the two ends of the metal connector are fixedly connected to the first movable transmission line and the second movable transmission line respectively. The metal connector can be a structural member independently made of metal material, and can be fixed to the corresponding positions on the first movable transmission line and the second movable transmission line by welding and other processes, so as to ensure the reliability of the connection between the metal connector, the first movable transmission line and the second movable transmission line, and at the same time ensure that energy can be effectively transmitted between the first movable transmission line and the second movable transmission line, thereby ensuring the consistency of electrical performance. In addition, the metal connector can be a sheet metal material, such as a metal plate, a metal block, etc., which has a certain structural stability. The metal connector can realize the constraint effect on the relative position of the first movable transmission line and the second movable transmission line, and can also ensure the consistency and stability of the movement of the first movable transmission line and the second movable transmission line, so that the first movable transmission line and the second movable transmission line can have a consistent gap with the metal body when moving to various positions, thereby ensuring electrical performance.

[0007] In a possible design, two ends of the metal connector are respectively welded to the first movable transmission line and the second movable transmission line, thereby ensuring the reliability of the connection between the metal connector, the first movable transmission line and the second movable transmission line, and at the same time ensuring that energy can be effectively transmitted between the first movable transmission line and the second movable transmission line, thereby ensuring the consistency of electrical performance.

[0008] In a possible design, the first end of the metal connector is connected to the first movable transmission line, the second end of the metal connector is bent toward one side of the second movable transmission line, the second movable transmission line is provided with a fixing hole, the metal connector is passed through the fixing hole, and is fixedly connected to the inner wall of the fixing hole, so that it is convenient to assemble and can achieve reliable connection between the metal body and the first movable transmission line and the second movable transmission line, while ensuring the effectiveness of signal transmission and the consistency of electrical performance.

[0009] In a possible design, the metal connector is disposed at the end of the first movable transmission line and protrudes from the edge of the metal body. There is a large space outside the edge of the metal body, which can facilitate the first movable transmission line to be connected to the second movable transmission line through the metal connector without being interfered by the structure of the phase shifting device.

[0010] In a possible design, the first movable transmission line and the metal connector are integrally formed, that is, during the molding process of the first movable transmission line, the metal connector can be molded at the same time, and the first movable transmission line including the metal connector is an independent part and can be assembled with the metal body as a whole, thereby facilitating processing and assembly operations.

[0011] In a possible design, the first movable transmission line, the second movable transmission line and the metal connector are integrally formed, that is, in a one-time molding process, the first movable transmission line, the second movable transmission line and the metal connector can be molded at the same time, so that the first movable transmission line, the second movable transmission line and the metal connector constitute an independent part that can be assembled onto the metal body as a whole. This can reduce the number of parts, facilitate production and assembly operations, save costs, and at the same time ensure the overall structural strength and stability of the first movable transmission line, the second movable transmission line and the metal connector.

[0012] In a possible design, the metal body includes a first fixed transmission line and at least one second fixed transmission line, and a first gap is provided between the first fixed transmission line and the second fixed transmission line. The first fixed transmission line is provided with the input port, and the second fixed transmission line is provided with the output port. The radio frequency signal fed from the main feeder to the first fixed transmission line will not be directly transmitted to the second fixed transmission line, but can be coupled to the first movable transmission line and the second movable transmission line by the first fixed transmission line. The first movable transmission line and the second movable transmission line have a larger length in the direction of the second fixed transmission line, and along the thickness direction of the phase shifter, the projection of the first movable transmission line and the second movable transmission line overlaps with at least part of the projection of the second fixed transmission line, that is, the first movable transmission line and the second movable transmission line can couple the radio frequency signal to the second fixed transmission line, and the distance between the first movable transmission line and the second movable transmission line and the target output port can be adjusted by rotating the first movable transmission line and the second movable transmission line, so that the electrical length of the radio frequency signal transmitted to the output port can be adjusted, thereby achieving phase adjustment.

[0013] In a possible design, a zero-phase output port is provided on the first fixed transmission line. The radio frequency signal fed from the main feeder to the first fixed transmission line can be fed directly to the antenna unit through the zero-phase output port without passing through the first movable transmission line and the second movable transmission line, that is, the movement of the first movable transmission line and the second movable transmission line does not affect the phase of the radio frequency signal output from the zero-phase output port, and therefore, the phase of the antenna unit matched with the zero-phase output port can be used as a reference for phase adjustment of other antenna units.

[0014] In a possible design, a plurality of the second fixed transmission lines are provided, a second gap is provided between two adjacent second fixed transmission lines, and an even number of the output ports are symmetrically provided on each of the second fixed transmission lines. The second fixed transmission lines are independent of each other, do not interfere with each other, and can output radio frequency signals independently. The first movable transmission line and the second movable transmission line can be coupled with the second fixed transmission lines, so that the radio frequency signal can be coupled to the second fixed transmission lines, and can be fed to the corresponding antenna unit through the output port on each second fixed transmission line. As a result, the phase shifting device can adjust the phase of the radio frequency signal at multiple output ports through only one input port.

[0015] In a possible design, along the thickness direction of the phase shifter, the projection of the metal connector is aligned with the second gap, so that the metal connector can move in the second gap. The second gap extends along an arc, and the center of the circle corresponding to the arc coincides with the center of the circle corresponding to the fan-shaped second fixed transmission line. Therefore, when the first movable transmission line and the second movable transmission line rotate, the metal connector can move in the second gap without interfering with the second fixed transmission line. By using the second gap to arrange the metal connector, there is no need to occupy space outside the edge of the metal body, and the integration of the phase shifter can be improved.

[0016] In a possible design, the second fixed transmission line is fan-shaped, and the rotational positions of the first movable transmission line and the second movable transmission line relative to the metal body can be located at the center of a circle corresponding to the fan-shaped shape, so that when the first movable transmission line and the second movable transmission line are rotated to various positions, the consistency of the structural coordination of the first movable transmission line, the second movable transmission line and the second fixed transmission line can be ensured.

[0017] In a possible design, along the thickness direction of the phase shifter, the projection of the first active transmission line coincides with the projection of the second active transmission line. By adjusting the phase of the radio frequency signal by the first active transmission line and the second active transmission line, the phase difference of the radio frequency signal fed to the antenna unit can be made close to 90°, thereby realizing dual polarization of the antenna unit.

[0018] In a possible design, the metal body is provided with a mounting hole for rotationally connecting with the driving shaft of the driving motor, and the first movable transmission line and the second movable transmission line are both connected to the driving shaft, so as to drive the first movable transmission line and the second movable transmission line to move synchronously through the driving shaft. When the driving motor controls the driving shaft to rotate, the driving shaft can drive the first movable transmission line and the second movable transmission line to move synchronously, so that the first movable transmission line and the second movable transmission line can be aligned with different positions on the second fixed transmission line, thereby achieving phase adjustment.

[0019] In a possible design, the first movable transmission line and the second movable transmission line are made of metal materials, which is beneficial to the transmission of radio frequency signals and also beneficial to the electrical connection between the second movable transmission line and the first movable transmission line.

[0020] In the second aspect, the present application also provides a base station antenna, which includes an antenna unit, a drive motor and the phase shifter provided in the first aspect of the present application, wherein the output port of the phase shifter is connected to the antenna unit, the drive shaft of the drive motor is rotatably connected to the body; the drive shaft is connected to the first active transmission line and the second active transmission line to drive the first active transmission line and the second active transmission line to rotate synchronously. The base station antenna including the aforementioned phase shifter has a similar technical effect to the aforementioned phase shifter, which will not be described in detail here.

[0021] In a third aspect, the present application further provides a base station antenna feed system, which includes the base station antenna provided in the second aspect of the present application. The base station antenna feed system including the aforementioned base station antenna has similar technical effects as the aforementioned base station antenna, which will not be described in detail here.

[0022] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 A schematic diagram of the structure of a base station antenna feed system provided in an embodiment of the present application;

[0025] Figure 2 A schematic structural diagram of a phase shifting device provided in a first embodiment of the present application at a viewing angle;

[0026] Figure 3 A schematic structural diagram of the phase shifting device provided in the first embodiment of the present application from another perspective;

[0027] Figure 4 A partial schematic diagram of a phase shifting device provided in the first embodiment of the present application at a metal connecting piece;

[0028] Figure 5 A front view of a phase shifting device provided in the first embodiment of the present application;

[0029] Figure 6 A schematic structural diagram of a phase shifting device provided in a second embodiment of the present application at a viewing angle;

[0030] Figure 7 A schematic structural diagram of the phase shifting device provided in the second embodiment of the present application from another perspective.

[0031] Reference numerals:

[0032] 100-Base Station Antenna

[0033] 200-antenna adjustment bracket;

[0034] 300-Holding pole;

[0035] 400-Joint seal;

[0036] 500- grounding device;

[0037] 1-Metal body;

[0038] 11- a first fixed transmission line;

[0039] 111 - input port;

[0040] 112-first gap;

[0041] 113-mounting hole;

[0042] 114- zero phase output port;

[0043] 12- second fixed transmission line;

[0044] 121 - output port;

[0045] 122-second gap;

[0046] 2- first active transmission line;

[0047] 3- Second active transmission line;

[0048] 31-fixing hole;

[0049] 4-Metal connectors. DETAILED DESCRIPTION

[0050] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0051] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0052] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0053] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0054] In the description of this application, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] A phase shifter is a device that can adjust the phase of a wave. It is widely used in antenna systems to adjust the phase of an antenna unit. A traditional phase shifter usually includes a movable transmission line and a fixed transmission line. The position of the fixed transmission line is relatively fixed, and the movable transmission line can move relative to the fixed transmission line, so that the electrical length between the input port and the output port of the phase shifter can be adjusted to achieve phase adjustment. Among them, the movable transmission line is gap-coupled with the fixed transmission line so that energy can be transmitted between the movable transmission line and the fixed transmission line. However, in order to ensure that the movable transmission line can move relative to the fixed transmission line, there is no structural constraint between the movable transmission line and the fixed transmission line, which easily causes poor structural stability between the movable transmission line and the fixed transmission line. For example, the movable transmission line may shake or deform, which will affect the consistency of electrical indicators.

[0056] The present application implements a phase shifting device, which can be used in a base station antenna. The base station antenna may include an antenna unit and a feeding network. The antenna unit is used to receive or send electromagnetic waves. The feeding network can feed the antenna unit. The feeding network may include a main feeder and the phase shifting device. The input port of the phase shifting device may be connected to the main feeder, and the phase of the radio frequency signal fed by the main feeder can be adjusted, and the phase of the radio frequency signal fed by the main feeder can be fed to the corresponding antenna unit through the output port. The base station antenna can be used in a base station antenna feed system. Figure 1The schematic diagram of the structure of the base station antenna feed system provided in the embodiment of the present application is shown in FIG. Figure 1 The base station antenna feed system includes a base station antenna 100, an antenna adjustment bracket 200, a pole 300, a joint seal 400, a grounding device 500, etc. The base station system is an interface device for wireless communication and can exchange information with communication terminals in the area.

[0057] Figure 2 This is a schematic structural diagram of a phase shifting device provided in the first embodiment of the present application at a viewing angle, Figure 3 This is a schematic diagram of the structure of the phase shifting device provided in the first embodiment of the present application from another perspective, referring to Figure 2 or Figure 3 The phase shifting device may include a metal body 1, a first active transmission line 2, and a second active transmission line 3. The material of the metal body 1 may be a metal with excellent electrical conductivity such as aluminum and copper. In one embodiment, the metal body 1 may be a flat plate structure. An input port 111 and a plurality of output ports 121 are provided on the metal body 1. The input port 111 may be connected to a main feeder in a feeding network to receive a radio frequency signal fed by the main feeder. The output port 121 may be connected to an antenna unit through a transmission line such as a strip line to feed the radio frequency signal after phase adjustment to the antenna unit.

[0058] Reference Figure 2 or Figure 3 , the first movable transmission line 2 and the second movable transmission line 3 both have the function of transmitting radio frequency signals. Along the thickness direction of the phase shifter, the first movable transmission line 2 is movably arranged on one side of the metal body 1, the first movable transmission line 2 is gap coupled with the metal body 1, and the projection of the first movable transmission line 2 coincides with at least part of the projection of the metal body 1. The second movable transmission line 3 is movably arranged on the side of the metal body 1 away from the first movable transmission line 2, the second movable transmission line 3 is gap coupled with the metal body 1, and the projection of the second movable transmission line 3 coincides with at least part of the projection of the metal body 1. Among them, the first movable transmission line 2 and the second movable transmission line 3 are respectively located on both sides of the metal body 1, and the radio frequency signal can be transmitted between the metal body 1 and the first movable transmission line 2 and between the metal body 1 and the second movable transmission line 3 by gap coupling.

[0059] Among them, there are at least two independent signal transmission paths between the metal body 1 and each active transmission line. The first signal transmission path is from the input port 111 to the end of the first active transmission line 2 close to the input port 111, and from the input port 111 to the end of the second active transmission line 3 close to the input port 111. The second signal transmission path is a path for coupling radio frequency signals from a portion of the first active transmission line 2 and the second active transmission line 3 away from the input port 111 to the metal body 1 and transmitting the radio frequency signal from the metal body 1 to the corresponding output port 121.

[0060] In one embodiment, the radio frequency signal fed into the metal body 1 by the main feed line through the input port 111 can be coupled to the first active transmission line 2 and the second active transmission line 3 respectively along the above-mentioned first signal transmission path, and the first active transmission line 2 and the second active transmission line 3 are synchronously moved to a preset position relative to the metal body 1 to adjust the phase of the radio frequency signal. Then, the first active transmission line 2 and the second active transmission line 3 can transmit the radio frequency signal to the corresponding output port 121 along the above-mentioned second signal transmission path, and feed it to the antenna unit from the corresponding output port 121. In which, along the thickness direction of the phase shifting device, the projection of the first active transmission line 2 coincides with the projection of the second active transmission line 3. By adjusting the phase of the radio frequency signal by the first active transmission line 2 and the second active transmission line 3, the phase difference of the radio frequency signal fed into the antenna unit can be made close to 90°, thereby realizing the dual polarization of the antenna unit.

[0061] In one embodiment, the first movable transmission line 2 and the second movable transmission line 3 can both be made of metal materials, which is beneficial to the transmission of radio frequency signals and also beneficial to the electrical connection between the second movable transmission line 3 and the first movable transmission line 2. The electrical connection means that the first movable transmission line 2 and the second movable transmission line 3 can be directly connected. The direct connection can be in the form of direct electrical connection between a part of the first movable transmission line 2 and a part of the second movable transmission line 3, or can be directly electrically connected through a connector with conductive properties, such as a metal structural part, a metal strip line, etc. By directly electrically connecting the first movable transmission line 2 and the second movable transmission line 3, it is possible to ensure that the first movable transmission line 2 and the second movable transmission line 3 have better consistency in electrical indicators. In addition, it is also possible to maximize the impedance matching space and maximize the optimal electrical performance of the phase shifting device.

[0062] In one embodiment, referring to Figure 2The phase shifting device includes a metal connector 4, and the two ends of the metal connector 4 are fixedly connected to the first movable transmission line 2 and the second movable transmission line 3 respectively. Among them, the metal connector 4 can be a structural member independently prepared from a metal material, and can be fixed to the corresponding positions on the first movable transmission line 2 and the second movable transmission line 3 by welding and other processes, so as to ensure the reliability of the connection between the metal connector 4, the first movable transmission line 2 and the second movable transmission line 3, and at the same time, it can ensure that energy can be effectively transmitted between the first movable transmission line 2 and the second movable transmission line 3, thereby ensuring the consistency of electrical performance. In one embodiment, the metal connector 4 can be a sheet metal material, such as a metal plate, a metal block, etc., which has a certain structural stability. The metal connector 4 can realize the constraint effect on the relative position of the first movable transmission line 2 and the second movable transmission line 3, and can also ensure the consistency and stability of the movement of the first movable transmission line 2 and the second movable transmission line 3, so that the first movable transmission line 2 and the second movable transmission line 3 can have a consistent gap with the metal body 1 when moving to various positions, thereby ensuring electrical performance.

[0063] In one embodiment, Figure 4 This is a partial schematic diagram of the phase shifting device provided in the first embodiment of the present application at the metal connecting member 4, referring to Figure 4 The first end of the metal connector 4 is connected to the first movable transmission line 2, and the second end of the metal connector 4 is bent toward one side of the second movable transmission line 3, that is, the metal connector 4 has a bent shape. A fixing hole 31 is provided on the second movable transmission line 3 at a position corresponding to the metal connector 4. After the first movable transmission line 2 and the second movable transmission line 3 are assembled to the metal body 1, the metal connector 4 can be inserted into the fixing hole 31, and then the metal connector 4 can be connected and fixed to the inner wall of the fixing hole 31 by welding or other methods, so that it is convenient to assemble and realize reliable connection between the metal body 1 and the first movable transmission line 2 and the second movable transmission line 3, while ensuring the effectiveness of signal transmission and the consistency of electrical performance.

[0064] In one embodiment, referring to Figure 3 , the metal connector 4 is arranged at the end of the first movable transmission line 2 and protrudes from the edge of the metal body 1. Among them, there is a large space outside the edge of the metal body 1, which can facilitate the connection of the first movable transmission line 2 with the second movable transmission line 3 through the metal connector 4 without being interfered by the structure of the phase shifting device. During the rotation of the first movable transmission line 2 and the second movable transmission line 3, the metal connector 4 can move synchronously outside the edge of the metal body 1, and the metal connector 4 can ensure the consistency of the movement of the first movable transmission line 2 and the second movable transmission line 3, while ensuring the structural stability of the first movable transmission line 2, the second movable transmission line 3 and the metal body 1.

[0065] In one embodiment, referring to Figure 4 The first movable transmission line 2 and the metal connector 4 can be integrally formed, that is, during the molding process of the first movable transmission line 2, the metal connector 4 can be molded at the same time. The first movable transmission line 2 including the metal connector 4 is an independent part and can be assembled with the metal body 1 as a whole, thereby facilitating processing and assembly operations.

[0066] In one embodiment, the first movable transmission line 2, the second movable transmission line 3 and the metal connector 4 can be integrally formed, that is, in a one-time forming process, the first movable transmission line 2, the second movable transmission line 3 and the metal connector 4 can be formed at the same time, so that the first movable transmission line 2, the second movable transmission line 3 and the metal connector 4 constitute an independent part, which can be assembled as a whole to the metal body 1. In this way, the number of parts can be reduced, the production and assembly operations are convenient, and the cost can be saved, while the overall structural strength and stability of the first movable transmission line 2, the second movable transmission line 3 and the metal connector 4 can be ensured.

[0067] In one embodiment, referring to Figure 2 The metal body 1 includes a first fixed transmission line 11 and at least one second fixed transmission line 12. The first fixed transmission line 11 is provided with an input port 111, and the first fixed transmission line 11 can be connected to the main feeder through the input port 111. The second fixed transmission line 12 is provided with an output port 121, and the second fixed transmission line 12 feeds the phase-adjusted RF signal to the antenna unit through the output port 121. There is a first gap 112 between the first fixed transmission line 11 and the second fixed transmission line 12. The radio frequency signal fed into the first fixed transmission line 11 by the main feeder will not be directly transmitted to the second fixed transmission line 12, but can be coupled to the first movable transmission line 2 and the second movable transmission line 3 by the first fixed transmission line 11. The first movable transmission line 2 and the second movable transmission line 3 have a large length in the direction of the second fixed transmission line 12, and along the thickness direction of the phase shifter, the projection of the first movable transmission line 2 and the second movable transmission line 3 coincides with at least a part of the projection of the second fixed transmission line 12, that is, the first movable transmission line 2 and the second movable transmission line 3 can couple the radio frequency signal to the second fixed transmission line 12. By rotating and adjusting the first movable transmission line 2 and the second movable transmission line 3, the distance between the first movable transmission line 2 and the second movable transmission line 3 and the target output port 121 can be adjusted, so that the electrical length of the radio frequency signal transmitted to the output port 121 can be adjusted, thereby achieving phase adjustment.

[0068] In one embodiment, referring to Figure 2, the first fixed transmission line 11 may be provided with a zero-phase output port 114, and the zero-phase output port 114 is connected to the antenna unit. The radio frequency signal fed from the main feeder to the first fixed transmission line 11 may not pass through the first movable transmission line 2 and the second movable transmission line 3, and can be directly fed to the antenna unit through the zero-phase output port 114, that is, the movement of the first movable transmission line 2 and the second movable transmission line 3 does not affect the phase of the radio frequency signal output from the zero-phase output port 114, therefore, the phase of the antenna unit matched with the zero-phase output port 114 can be used as a reference for phase adjustment of other antenna units.

[0069] In one embodiment, the second fixed transmission line 12 is a continuous structure made of a metal material that is bent back and forth multiple times, so that a longer radio frequency signal transmission path can be constructed in a smaller space, making it easier to adjust the phase in a larger range.

[0070] In one embodiment, the first movable transmission line 2 and the second movable transmission line 3 are rotatably connected to the first fixed transmission line 11 through the driving shaft of the driving motor, and the driving shaft can be rotatably connected to the first fixed transmission line 11. For example, the first fixed transmission line 11 can be provided with a mounting hole 113 (refer to Figure 2 ), the driving shaft can be rotatably arranged in the mounting hole 113. The first movable transmission line 2 and the second movable transmission line 3 can be fixedly connected to the driving shaft. For example, the first movable transmission line 2 and the second movable transmission line 3 can be fixedly connected to the driving shaft by screws, buckles, etc. When the driving motor controls the driving shaft to rotate, the driving shaft can drive the first movable transmission line 2 and the second movable transmission line 3 to move synchronously, so that the first movable transmission line 2 and the second movable transmission line 3 can be aligned with different positions on the second fixed transmission line 12, thereby realizing phase adjustment.

[0071] In one embodiment, referring to Figure 2, a plurality of second fixed transmission lines 12 are provided, and a second gap 122 is provided between two adjacent second fixed transmission lines 12, and an even number of output ports 121 are symmetrically provided on each second fixed transmission line 12. For example, two output ports 121 can be symmetrically provided on each second fixed transmission line 12. When the first movable transmission line 2 and the second movable transmission line 3 move, the distances between the first movable transmission line 2 and the second movable transmission line 3 and the two symmetrically provided output ports 121 will change, thereby achieving a change in phase. Among them, each second fixed transmission line 12 is independent of each other, does not interfere with each other, and can output radio frequency signals independently. The first movable transmission line 2 and the second movable transmission line 3 can be coupled with each second fixed transmission line 12, so that the radio frequency signal can be coupled to each second fixed transmission line 12, and can be fed to the corresponding antenna unit through the output port 121 on each second fixed transmission line 12. Therefore, the phase shifting device can adjust the phase of the radio frequency signal at multiple output ports 121 only through one input port 111. In one embodiment, referring to Figure 2 , two second fixed transmission lines 12 are provided, each second fixed transmission line 12 is symmetrically provided with two output ports 121, and the two second fixed transmission lines 12 have a total of four output ports 121, and one first fixed transmission line 11 has one input port 111, so that the phase shifting device constitutes a 1to4 phase shifting device. In some other embodiments, only one first fixed transmission line 11 may be provided, and the first fixed transmission line 11 is symmetrically provided with two output ports 121, so that the phase shifting device constitutes a 1to2 phase shifting device.

[0072] In one embodiment, Figure 5 This is a front view of the phase shifting device provided in the first embodiment of the present application, referring to Figure 5 The second fixed transmission line 12 is fan-shaped, and the output ports 121 are located at both ends of the length direction of the second fixed transmission line 12. The rotational positions of the first movable transmission line 2 and the second movable transmission line 3 relative to the metal body 1 can be located at the center of the circle corresponding to the fan-shaped, so that when the first movable transmission line 2 and the second movable transmission line 3 are rotated to various positions, the consistency of the structural coordination of the first movable transmission line 2, the second movable transmission line 3 and the second fixed transmission line 12 can be ensured.

[0073] In one embodiment, Figure 6 A schematic diagram of the structure of a phase shifting device provided in the second embodiment of the present application at a viewing angle, Figure 7 A schematic diagram of the structure of the phase shifting device provided in the second embodiment of the present application from another perspective, referring to Figure 7, along the thickness direction of the phase shifting device, the projection of the metal connector 4 is aligned with the second gap 122, so that the metal connector 4 can move in the second gap 122. The second gap 122 extends along an arc, and the center of the circle corresponding to the arc coincides with the center of the circle corresponding to the fan-shaped second fixed transmission line 12. Therefore, when the first movable transmission line 2 and the second movable transmission line 3 rotate, the metal connector 4 can move in the second gap 122 without interfering with the second fixed transmission line 12. By using the second gap 122 to arrange the metal connector 4, there is no need to occupy the space outside the edge of the metal body 1, and the integration of the phase shifting device can be improved.

[0074] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A phase shifting device, characterized in that: include: A metal body, wherein the metal body is provided with an input port and a plurality of output ports; a first movable transmission line, which is movably disposed on one side of the metal body along the thickness direction of the phase shifting device, the first movable transmission line being gap-coupled with the metal body, and a projection of the first movable transmission line overlapping at least a portion of a projection of the metal body; A second movable transmission line is movably arranged on a side of the metal body away from the first movable transmission line along the thickness direction of the phase shifting device, the second movable transmission line is gap-coupled with the metal body, and a projection of the second movable transmission line overlaps with at least a portion of the projection of the metal body; the second movable transmission line is electrically connected to the first movable transmission line.

2. The phase shifting device according to claim 1, characterized in that: It also includes a metal connector, two ends of which are fixedly connected to the first movable transmission line and the second movable transmission line respectively.

3. The phase shifting device according to claim 2, characterized in that: Two ends of the metal connector are respectively connected to the first movable transmission line and the second movable transmission line by welding.

4. The phase shifting device according to claim 2, characterized in that: The first end of the metal connector is connected to the first movable transmission line, and the second end of the metal connector is bent toward one side of the second movable transmission line. A fixing hole is provided on the second movable transmission line. The metal connector is inserted into the fixing hole and fixedly connected to the inner wall of the fixing hole.

5. The phase shifting device according to claim 4, characterized in that: The metal connecting piece is arranged at the end of the first movable transmission line and protrudes from the edge of the metal body.

6. The phase shifting device according to claim 4, characterized in that: The first movable transmission line and the metal connecting piece are integrally formed.

7. The phase shifting device according to claim 4, characterized in that: The first movable transmission line, the second movable transmission line and the metal connecting piece are integrally formed.

8. The phase shifting device according to claim 2, characterized in that: The metal body comprises a first fixed transmission line and at least one second fixed transmission line, and a first gap is formed between the first fixed transmission line and the second fixed transmission line; The first fixed transmission line is provided with the input port, and the second fixed transmission line is provided with the output port.

9. The phase shifting device according to claim 8, characterized in that: The first fixed transmission line is provided with a zero-phase output port.

10. The phase shifting device according to claim 8, characterized in that: There are a plurality of the second fixed transmission lines, a second gap is provided between two adjacent second fixed transmission lines, and an even number of the output ports are symmetrically provided on each of the second fixed transmission lines.

11. The phase shifting device according to claim 10, characterized in that: Along the thickness direction of the phase shifting device, the projection of the metal connecting member is aligned with the second gap, so that the metal connecting member can move in the second gap.

12. The phase shifting device according to any one of claims 8 to 11, characterized in that: The second fixed transmission line is fan-shaped.

13. The phase shifting device according to any one of claims 1 to 12, characterized in that: Along the thickness direction of the phase shifting device, the projection of the first movable transmission line coincides with the projection of the second movable transmission line.

14. The phase shifting device according to any one of claims 1 to 13, characterized in that: The metal body is provided with a mounting hole for rotationally connecting with the driving shaft of the driving motor, and the first movable transmission line and the second movable transmission line are both connected to the driving shaft so as to drive the first movable transmission line and the second movable transmission line to move synchronously through the driving shaft.

15. The phase shifting device according to any one of claims 1 to 14, characterized in that: The first movable transmission line and the second movable transmission line are made of metal material.

16. A base station antenna, characterized in that: It comprises an antenna unit, a driving motor and the phase shifting device according to any one of claims 1 to 15, wherein the output port of the phase shifting device is connected to the antenna unit, the driving shaft of the driving motor is rotatably connected to the metal body of the phase shifting device; the driving shaft is connected to the first movable transmission line and the second movable transmission line to drive the first movable transmission line and the second movable transmission line to rotate synchronously.

17. A base station antenna feed system, characterized in that: Includes the base station antenna as claimed in claim 16.

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