Small modular base station phase shifter

Abstract

The invention discloses a small-sized modularized base station phase shifter, and relates to the technical field of base station phase shifters, the small-sized modularized base station phase shifter comprises a fixed assembly, a moving assembly and a wire system, the fixed assembly comprises a plurality of first fixed parts and a second fixed part, the first fixed parts can be detachably buckled with each other, the moving assembly comprises a first moving part and a second moving part, and the first moving part and the second moving part are detachably buckled with each other. The lead system adopts a multi-stage parallel connection mode and comprises a first-stage line, second-stage lines and a third-stage line, the third-stage line is embedded between two adjacent second-stage lines, and a connecting line located on the outer side of the shell is arranged between the third-stage line and the second-stage line. The three-level lines are embedded between the two adjacent two-level lines, and the three-level lines and the two-level lines are connected through the connecting lines located on the outer side of the shell, so that the occupied space can be reduced; the detachable and splicable modular design is adopted, so that the research and development and manufacturing cost can be reduced; the third-level circuit and the second-level circuit are arranged in a split mode, machining errors can be reduced, and phase control precision can be improved.

Description

Technical Field

[0001] This invention relates to the field of base station phase shifter technology, and in particular to a small modular base station phase shifter. Background Technology

[0002] Under the trend of green and low-carbon communication networks, base station antennas require low loss and high efficiency. As a core component, cavity phase shifters need to have characteristics such as low insertion loss and short external cables. Traditional cavity phase shifters mostly adopt series or parallel topologies, which have problems such as large cavity size, poor versatility, high mold costs, and low processing accuracy. Especially in multi-port designs, phase compensation is difficult, the structure is complex, and the production cost is high. Furthermore, the long length of the integrated metal strip leads to increased cumulative error and easy deformation during transport. In addition, existing processes such as whole-cavity electroplating or local laser welding are costly and have unstable performance. Therefore, there is an urgent need for a cavity phase shifter solution that is compact, highly modular, low-cost, and easy to process and assemble. Summary of the Invention

[0003] This invention aims to address at least one of the technical problems existing in the prior art. To this end, this invention proposes a small modular base station phase shifter that improves structural compactness and reduces cost.

[0004] A small modular base station phase shifter according to an embodiment of the present invention includes: A fixing component includes a housing and a fixing medium inserted into the housing. The fixing medium includes a first fixing member and a second fixing member. The first fixing member is provided with multiple members and can be detachably fastened to each other. The movable component includes multiple movable media that are detachably connected to each other, the movable media including a first movable member and a second movable member; The conductor system adopts a multi-level parallel connection method and includes primary line, secondary line and tertiary line. The tertiary line is embedded between two adjacent secondary lines, and there is a connecting line on the outside of the shell between the tertiary line and the secondary line. The first fixing component is connected to the output end of the primary line, and the second fixing component is used to fix and install the secondary and tertiary lines; the first moving component corresponds to the position of the primary and secondary lines, and the second moving component corresponds to the position of the tertiary line.

[0005] A small modular base station phase shifter according to an embodiment of the present invention has at least the following beneficial effects: This embodiment includes a fixed component, a movable component, and a wiring system. A tertiary circuit is embedded between two adjacent secondary circuits, and a connecting wire located on the outside of the housing connects the tertiary and secondary circuits. This integrates the tertiary phase-shifting circuit, which traditionally requires a separate space, into the secondary space, significantly reducing the overall size and solving the problem of excessively wide multi-port phase shifters. The fixed medium includes multiple first fixing components that can be detachably fastened to each other, and the movable component includes multiple movable media that can be detachably fastened to each other. This modular design, which allows for detachment and assembly, reduces the types of dedicated molds required for different product specifications, thereby significantly reducing R&D, mold making, and mass production costs. The separate arrangement of the tertiary and secondary circuits reduces the cumulative error caused by long-distance wire processing, improving phase control accuracy and product consistency.

[0006] According to some embodiments of the present invention, a first module and a second module are further provided. Both the first module and the second module include a primary line and a secondary line, and the first module and the second module are connected by a tertiary line.

[0007] According to some embodiments of the present invention, the first movable member is provided with a protrusion, and the second movable member is provided with a slot, wherein the protrusion can be inserted into the slot so that the first movable member and the second movable member are engaged with each other.

[0008] According to some embodiments of the present invention, the primary circuit and the secondary circuit are integrally formed, and the primary circuit is connected to both sides of the secondary circuit.

[0009] According to some embodiments of the present invention, the housing is provided with an interface for plugging in a connecting wire, and a metal layer is coated at the interface by cold spraying. The metal layer can be used to weld the housing to the connecting wire.

[0010] According to some embodiments of the present invention, the first movable member is provided with a first segment, a second segment and a third segment, the first segment and the third segment are respectively connected to the two ends of the second segment, and both the first segment and the third segment are provided with a protruding first boss, which can abut against the first fixed member.

[0011] According to some embodiments of the present invention, the outer periphery of the housing is provided with a plurality of mounting members, the mounting members are integrally formed with the housing, and the mounting members are inserted into a fixing bracket for fixing the housing.

[0012] According to some embodiments of the present invention, the housing is provided with a partition plate that can divide the inner cavity of the housing into two mounting cavities. The fixing component, the moving component, and the wiring system are each provided in two sets and are located in the two mounting cavities respectively.

[0013] According to some embodiments of the present invention, a snap-fit ​​member is inserted between two first fasteners located in two mounting cavities, the snap-fit ​​member being provided with an elastic piece capable of abutting against the sidewall of either of the first fasteners.

[0014] According to some embodiments of the present invention, the first fixing member is provided with an insertion hole for inserting a snap-fit ​​member, and the first fixing member is provided with a plurality of support portions that can abut against the inner wall of the mounting cavity, and support portions are provided on both sides of the insertion hole to position the snap-fit ​​member.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is an internal view of a small modular base station phase shifter according to an embodiment of the present invention; Figure 2 for Figure 1 A magnified view of A in the middle; Figure 3 for Figure 1 A magnified view of B in the middle; Figure 4 for Figure 2 A magnified view of C; Figure 5 for Figure 2 A magnified view of D; Figure 6 This is an isometric view of the conductor system in an embodiment of the present invention; Figure 7 for Figure 6 A magnified view of E in the middle; Figure 8 for Figure 7 Enlarged view of F; Figure 9 for Figure 6 A magnified view of G; Figure 10 This is a cross-sectional view of the fixing bracket installed on the outer casing in an embodiment of the present invention; Figure 11 This is a schematic diagram of the installation of the snap-fit ​​component in an embodiment of the present invention; Figure 12 This is a schematic diagram of the installation of the line bracket in an embodiment of the present invention; Figure 13 This is a schematic diagram of the fastening of the first fixing member in an embodiment of the present invention; Figure 14 This is a schematic diagram of the interface in an embodiment of the present invention; Figure 15 This is a schematic diagram of the multi-level connection of the conductor system in an embodiment of the present invention.

[0017] Figure label: Fixing component 100; housing 101; interface 1011; mounting cavity 102; partition plate 103; pull rod 104; first fixing member 105; support part 1051; insertion hole 1052; elastic part 1053; second fixing member 106; second boss 107; snap-fit ​​member 108; elastic sheet 109; Movable component 110; First movable member 111; Second movable member 112; Protrusion 113; Slot 114; First segment 115; Second segment 116; Third segment 117; First boss 118; Conductor system 120; Primary line 121; Secondary line 122; Tertiary line 123; Connecting line 124; Output terminal 125; Connecting part 126; Module 130; Mounting component 131; Guide frame 132; Fixing frame 133; Line bracket 134; Hook 136; Pressure plate 137; Fastener 138; Elastic buckle 139; Module 2, 140. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] 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.

[0020] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "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.

[0021] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and 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.

[0022] Reference Figures 1 to 15A small modular base station phase shifter according to an embodiment of the present invention includes a fixed component 100, a movable component 110, and a wiring system 120, which work together to perform phase adjustment of radio frequency signals. The fixed component 100 constitutes the mechanical body and support frame of the phase shifter, and mainly includes a housing 101. The housing 101 is typically an elongated structure with a cavity, and the interior forms a cavity for accommodating other functional components.

[0023] Understandably, a partition plate 103 is provided inside the housing 101, dividing the inner cavity of the housing 101 into two relatively independent and structurally identical mounting cavities 102. This dual-cavity design allows a single housing 101 to accommodate two independent phase-shifting units, thereby achieving higher port density and structural compactness. Each of the two mounting cavities 102 can be configured with a complete phase-shifting system and operate independently.

[0024] In addition to providing structural support and electromagnetic shielding, the outer casing 101 is also designed with several integrally molded mounting components 131. In this embodiment, the outer casing 101 is made of plastic, and the mounting components 131 are integrally injection molded with the outer casing 101. The mounting components 131 are mainly used to fix external cables or other components. Their integrated design avoids additional drilling or welding, simplifies the processing steps, and ensures structural strength.

[0025] Understandably, the fixing medium inserted inside the housing 101 is a key part of the fixing assembly 100, and its main function is to support and fix the conductor system 120. The fixing medium adopts a modular and splicable design concept, specifically divided into a first fixing component 105 and a second fixing component 106. The first fixing component 105 is mainly used to support and fix the primary circuit 121 section of the conductor system 120 near the input / output terminal 125.

[0026] It is understandable that multiple first fixing members 105 can be provided, and adjacent first fixing members 105 are connected by a detachable fastening structure. This design allows the length of the first fixing member 105 to be flexibly increased or decreased according to the number of output terminals 125 required by the actual phase shifter, much like assembling building blocks. For example, refer to... Figure 13 Each of the first fixing members 105 has a protrusion 113 at its end and a slot 114 at its end. By protruding into the slot 114, the two first fixing members 105 can be interlocked. Thus, when it is necessary to adjust the number of output ports, the corresponding first fixing members 105 can be spliced ​​or reduced to achieve modular setting of the first fixing members 105, adapt to different needs, reduce the number of molds, and thus reduce design and production costs.

[0027] Reference Figure 8Each first fixing member 105 has a support portion 1051 on its side wall. When multiple first fixing members 105 are spliced ​​together and inserted into the mounting cavity 102, these support portions 1051 will abut against the inner wall of the mounting cavity 102, thereby achieving stable lateral positioning within the cavity and preventing left-right swaying. Further, refer to... Figure 11 The first fixing member 105 has an elastic part 1053 on the side opposite to the support part 1051. The elastic part 1053 can elastically abut against the partition plate 103, thereby ensuring that the support part 1051 is stably abutted against the inner wall of the mounting cavity 102 and preventing the first fixing member 105 from shaking.

[0028] The first fixing member 105 also has an insertion hole 1052 for mounting the snap-fit ​​member 108. When a dual-cavity structure is used, the two rows of first fixing members 105 located in the two mounting cavities 102 can be connected and fixed by inserting a common snap-fit ​​member 108. For example... Figure 11 As shown, one end of the snap-fit ​​108 is provided with an elastic sheet 109. When the snap-fit ​​108 is inserted into the insertion hole 1052 of the first fixing members 105 on both sides, the elastic sheet 109 will open outward and abut against the side wall of one first fixing member 105 away from the other first fixing member 105, thereby locking the first fixing members 105 on both sides together and clamping the partition plate 103, which can enhance the rigidity of the overall structure and ensure the relative position accuracy of the phase shifting units in the two cavities. Furthermore, a support portion 1051 is provided on both sides of the insertion hole 1052. The support portion 1051 not only plays a positioning role, but also prevents the snap-fit ​​108 from shifting in the insertion hole.

[0029] Understandably, the second fixing member 106 is located on the side of the mounting cavity 102 away from the first fixing member 105. The second fixing member 106 is used to support and fix the secondary circuit 122 and the tertiary circuit 123 of the conductor system 120. Understandably, similar to the first fixing member 105, the second fixing member 106 can also be designed as a modular assembly, thereby achieving flexible length adjustment and improving the flexibility of use.

[0030] Understandably, the moving component 110 is the core actuator for realizing the phase adjustment function. It consists of multiple slidable moving media that can move linearly along the length of the housing 101 under the drive of an external force (transmitted through the pull rod 104). The moving media include a first moving member 111 and a second moving member 112. The first moving member 111 corresponds in length and shape to the distribution area of ​​the primary circuit 121 and the secondary circuit 122. The second moving member 112 corresponds to the distribution area of ​​the tertiary circuit 123.

[0031] To achieve synchronous and smooth movement of multiple moving media, adjacent first moving parts 111 and second moving parts 112 are connected together by a detachable fastening structure. For example... Figure 2 As shown in the figure, a protrusion 113 is provided on the upper side of the first moving member 111, and a slot 114 is provided at the corresponding position of the second moving member 112. During assembly, the protrusion 113 is aligned and inserted into the slot 114 to achieve a reliable connection between the two, forming a synchronously movable dielectric plate assembly that can cover the entire phase-shifting area. This split and modular design allows the moving dielectric to adapt to changes in phase shifter length under different module combinations, eliminating the need to develop separate molds for each configuration and providing strong versatility. Furthermore, the second moving member 112 can be provided with a protrusion 113, and the corresponding position of the slot 114 can be provided in the first moving member 111, which can enhance the connection stability between the first moving member 111 and the second moving member 112.

[0032] To ensure smooth movement and reduce friction, refer to Figure 3 , Figure 4 and Figure 5 The first moving component 111 is divided into three sections: a second section 116 located in the middle, and a first section 115 and a third section 117 connected to the two ends of the second section 116, respectively. The bottom walls of the first section 115 and the third section 117 are designed with downwardly protruding first bosses 118. When the moving component 110 is installed in place, the first bosses 118 will contact the upper surface of the first fixing component 105 below, which on the one hand plays a vertical limiting role to prevent the moving medium from jumping up and down during sliding; on the other hand, by reducing the sliding contact surface from the entire bottom surface of the medium plate to a few boss points, the sliding friction resistance can be significantly reduced, making the phase adjustment smoother and more precise, and reducing the force required to drive the pull rod. Correspondingly, the second fixing member 106 is provided with a second boss 107 on the side facing the moving component 110. The second boss 107 can abut against the outer wall of the first moving member 111 of the moving component 110. When the first moving member 111 moves, the second boss 107 can reduce the contact area between the first moving member 111 and the second fixing member 106, thereby reducing the sliding resistance and improving the transmission efficiency and response speed.

[0033] Reference Figure 1 The moving component 110 is connected to an external drive mechanism via a pull rod 104. To further improve the stability and accuracy of the pull rod 104's guidance, multiple guide brackets 132 are installed on the outside of the housing 101. The pull rod 104 is slidably inserted into the guide brackets 132 to ensure that the pull rod 104 does not undergo unexpected deflection or bending during the pushing and pulling process. Furthermore, the guide bracket 132 is provided with a hook 136, which can hook onto the mounting member 131. The mounting member 131 protrudes outward and has extensions that flare outward to both sides (e.g., Figure 10 and Figure 12 As shown, the extension can be engaged with the hook 136 to achieve a stable connection with the guide frame 132.

[0034] Furthermore, the outer wall of the housing 101 is provided with multiple mounting brackets 133. The mounting brackets 133 are used for mounting and fixing the housing 101 or connecting it with other components of the base station (such as antenna reflectors). The mounting brackets 133 are also provided with fasteners 138, similar to hooks 136, that can fasten the extension of the mounting component 131 to achieve a convenient and stable connection between the mounting brackets 133 and the housing 101. Furthermore, in order to facilitate the installation and connection of the housing 101 with components such as the base station, the mounting brackets 133 have elastic buckles 139. The elastic buckles 139 can be inserted into the mounting holes of other components, and a pressure plate 137 is provided at the base of the elastic buckle 139 to abut against the surface of other components. The pressure plate 137 has a certain elasticity, which allows the elastic buckle 139 to abut against the inner wall of the mounting hole into which it is inserted, achieving a stable insertion and facilitating installation without bolts, thus enabling convenient maintenance and expansion.

[0035] Understandably, the conductor system 120 is the electrical core of the phase shifter for signal transmission and phase control. For example... Figure 6 , Figure 7 and Figure 15 As shown, the conductor system 120 adopts a multi-stage parallel connection method. After the signal enters from the main feed input port, it is distributed stage by stage. Specifically, it includes a primary line 121, a secondary line 122, and a tertiary line 123. The primary line 121 has multiple output terminals 125 at its end for outputting radio frequency signals. The secondary line 122 and the tertiary line 123 together form the subsequent phase-shifting network. Specifically, the tertiary line 123 is used to connect to the input terminal, receive the radio frequency signal, and transmit it to the primary line 121 through the secondary line 122.

[0036] The key structural feature is that the tertiary line 123 is embedded in the space between two adjacent secondary lines 122. Since the secondary lines 122 and the tertiary line 123 are stacked in the vertical direction, the tertiary line 123 is accommodated in the space freed up between the two secondary lines 122, thereby significantly compressing the height of the phase shifter cavity in the vertical direction and improving the compactness of the structure.

[0037] To achieve embedded connectivity while ensuring electrical performance, the tertiary line 123 is connected to the secondary lines 122 on both sides via a connecting line 124 located outside the housing 101. It is understood that the connecting line 124 is preferably a flexible cable such as a coaxial cable, with its two ends connected to the ends of the tertiary line 123 and the corresponding secondary line 122, respectively. It is understood that the outer wall of the housing 101 has an interface 1011 connecting to the mounting cavity 102, and the connecting line 124 passes through and enters from the interface 1011, completing the signal jumper connection outside the cavity. This "external jumper" design allows the tertiary line 123 to be "embedded" between the two secondary lines 122, thereby reducing the space occupied along the width direction and allowing the housing 101 to be smaller. By "moving" the longest and highest phase-shifting line in a traditional tertiary phase shifter to the outside of the cavity, and utilizing the flexibility of the cable, it no longer needs to occupy valuable straight space inside the cavity, thus achieving a breakthrough reduction in cavity size.

[0038] Reference Figure 9 The secondary line 122 also includes a connecting part 126, which can be connected to the first fixing member 105 and the second fixing member 106 at the same time. The connecting part 126 handles the gap between the two primary lines 121, and realizes the stable installation of the conductor system 120 while making full use of the space of the mounting cavity 102.

[0039] It is understandable that, such as Figure 14 As shown, the housing 101 has dedicated interfaces 1011 for threading and securing the connecting wires 124. Furthermore, the housing 101 is equipped with detachable cable brackets 134, which can be used to secure the connecting wires 124 or other cables. To ensure good electrical connection and soldering between the shielding layer of the connecting wires 124 (such as coaxial cables) and the housing 101, a cold spraying process is used on the inner wall surface at the interfaces 1011. This process uses a supersonic airflow to accelerate and impact metal powder (such as copper powder) onto the substrate surface, forming a dense and robust metal coating. This metal coating provides an ideal base for subsequent soldering (such as tin soldering), significantly reducing costs compared to traditional overall electroplating processes; compared to localized laser welding, it reduces the thermal impact on the base material, avoiding deformation or changes in material properties due to high temperatures, thus ensuring good conductivity and mechanical strength at the solder joints and contributing to improved voltage standing wave ratio (VSWR) performance.

[0040] Based on the modular design concept, the entire phase shifter can be viewed as a combination of several standardized functional modules. For example... Figure 1As shown, a first module 130 and a second module 140 can be defined. Each of the first module 130 and the second module 140 contains a complete set of primary circuits 121 and connected secondary circuits 122. They can operate independently, forming a phase shifter with a small number of ports (e.g., 5 or 6 channels). When more ports are needed, such as forming a 10, 11, or 12-channel phase shifter, a first module 130 and a second module 140 (or two identical modules) can be connected via a common tertiary circuit 123 and corresponding connecting lines 124, thus forming a larger-scale phase shifting system. The first module 130 and the second module 140 can be completely identical standard components, or they can be distinguished by left / right positions or minor functional differences, but the core wire layout and interfaces are compatible. This modular combination method brings significant flexibility and economy. The product platform only needs to develop molds for a few standard modules (such as 5-way modules, 6-way modules, and three-level lines 123). Through different permutations and combinations, products with a variety of port numbers can be derived, which can significantly reduce mold development costs and inventory management costs.

[0041] Understandably, the primary circuit 121, secondary circuit 122, and tertiary circuit 123 are all manufactured using separate metal strips (such as copper strips) through precision stamping or etching processes. Specifically, primary circuit 121 and secondary circuit 122 are integrally formed, while tertiary circuit 123 is independently set. Compared to traditional integral long strips, the length of each segment of the strip is significantly shortened after being separated. Shorter metal strips allow for easier control of cumulative tolerances during stamping, resulting in significantly improved processing accuracy. During electroplating, transfer, and assembly, shorter strips are also less prone to bending deformation, thus ensuring the stability of the final product's electrical performance (especially phase accuracy and consistency).

[0042] Furthermore, to optimize assembly and maintenance, the present invention also includes some auxiliary structural components. For example... Figure 10 and Figure 12 As shown, the line bracket 134 used to fix external cables can be directly plugged into the one-piece mounting part 131 on the housing 101 without the need for screws, making installation quick and easy.

[0043] In summary, this invention achieves a reduction in the size of the phase shifter cavity by innovatively embedding the tertiary line 123 between the secondary lines 122 and employing an external connecting line 124. Through a comprehensive modular and splicable design of the fixed medium, moving medium, and conductor system, it achieves extremely high flexibility in product configuration and a significant reduction in production costs. The design of the split short conductor system 120 and the application of new processes such as cold spraying improve processing accuracy and electrical performance. These improvements are interconnected and complementary, collectively constituting a high-performance, low-cost, easy-to-manufacture, and highly versatile small modular base station cavity phase shifter solution, effectively overcoming many shortcomings of existing technologies.

[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A small modular base station phase shifter, characterized in that, include: A fixing component includes a housing and a fixing medium inserted into the housing. The fixing medium includes a first fixing member and a second fixing member. The first fixing member is provided with multiple members and can be detachably fastened to each other. A movable component includes a plurality of mutually detachable and interlocking movable media, the movable media including a first movable element and a second movable element; The conductor system adopts a multi-level parallel connection method and includes a primary line, a secondary line and a tertiary line. The tertiary line is embedded between two adjacent secondary lines, and a connecting line located on the outside of the outer shell is provided between the tertiary line and the secondary line. The first fixing member is connected to the output end of the primary line, and the second fixing member is used to fix the secondary line and the tertiary line. The first moving part corresponds to the position of the primary line and the secondary line, and the second moving part corresponds to the position of the tertiary line.

2. The small modular base station phase shifter according to claim 1, characterized in that, It also includes a first module and a second module, both of which include the first-level line and the second-level line, and the first module and the second module are connected by the third-level line.

3. A small modular base station phase shifter according to claim 1, characterized in that, The first movable member has a protrusion, and the second movable member has a slot. The protrusion can be inserted into the slot so that the first movable member and the second movable member can be fastened together.

4. A small modular base station phase shifter according to claim 1, characterized in that, The primary circuit and the secondary circuit are integrally formed, and the primary circuit is connected to both sides of the secondary circuit.

5. A small modular base station phase shifter according to claim 1, characterized in that, The housing is provided with an interface for inserting the connecting wire. The interface is coated with a metal layer by cold spraying, and the metal layer can be used to weld the housing to the connecting wire.

6. A small modular base station phase shifter according to claim 1, characterized in that, The first movable member is provided with a first segment, a second segment and a third segment. The first segment and the third segment are respectively connected to the two ends of the second segment, and both the first segment and the third segment are provided with a protruding first boss, which can abut against the first fixed member.

7. A small modular base station phase shifter according to claim 1, characterized in that, The outer periphery of the housing is provided with a plurality of mounting parts, the mounting parts are integrally formed with the housing, and the mounting parts are inserted into a fixing bracket for fixing the housing.

8. A small modular base station phase shifter according to claim 1, characterized in that, The housing is provided with a partition plate, which can divide the inner cavity of the housing into two mounting cavities. The fixing component, the moving component and the wire system are each provided in two sets and are located in the two mounting cavities respectively.

9. A small modular base station phase shifter according to claim 8, characterized in that, A snap-fit ​​element is inserted between the two first fasteners located in the two mounting cavities. The snap-fit ​​element is provided with an elastic piece that can abut against the sidewall of either of the first fasteners.

10. A small modular base station phase shifter according to claim 9, characterized in that, The first fixing member is provided with an insertion hole for inserting the snap-fit ​​member, and the first fixing member is provided with a plurality of support portions that can abut against the inner wall of the mounting cavity. The support portions are provided on both sides of the insertion hole to position the snap-fit ​​member.

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