Cavity assembly and phase shifter

Abstract

The invention provides a cavity assembly and a phase shifter, the cavity assembly comprises a metal cavity, the metal cavity is integrally formed by a metal plate, and the metal plate is sequentially bent along the same axis to form a plurality of side walls in the circumferential direction of the metal cavity in a surrounding manner, at least one end part of the same axis of the metal plate forms a closed part, the closed part is positioned outside an inner cavity of the metal cavity and is attached to or connected with one side wall of the metal cavity, so that the inner cavity forms an electromagnetic shielding cavity, and a plurality of open-circuit branches are loaded on the closed part. Under the combined action of the closed part and the open-circuit branch knot, a stable and controllable electromagnetic environment is provided for the phase shifter. The phase shifter can accurately realize a phase adjustment function, and keeps high stability and reliability at the same time. Due to the fact that leakage and interference of electromagnetic waves are effectively controlled, the phase error and the fluctuation range of the phase shifter are reduced, and the overall performance of the system is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of mobile communications, and in particular relates to a cavity component and a phase shifter equipped with the cavity component. Background Art

[0002] Globally, with the in-depth promotion and practice of the concept of green and low-carbon development, mobile communication networks, as the cornerstone of information transmission in modern society, are gradually moving towards green and low-carbon transformation and upgrading. Against this backdrop, base station antennas in mobile communication networks, as important nodes of energy consumption and environmental impact, are also facing the urgent need for green and low-carbon development. The performance optimization and manufacturing cost reduction of base station antennas are of great significance to reducing the overall energy consumption and carbon emissions of communication networks and promoting the sustainable development of the industry.

[0003] Phase shifters are one of the main devices in mobile communication networks, and the cavity of the phase shifter is particularly critical, which is directly related to the overall performance and cost-effectiveness of the antenna. At present, the manufacturing method of the phase shifter cavity commonly used in the industry is electroplating after extrusion molding. Although this traditional process meets the basic performance requirements of the phase shifter to a certain extent, its inherent environmental disadvantages and cost issues are becoming increasingly prominent, becoming an important obstacle to the green and low-carbon transformation of the industry.

[0004] Environmental disadvantages: As an important means of metal surface treatment, the electroplating process will inevitably produce a large amount of "three industrial wastes" such as wastewater, waste gas and waste residue. Wastewater contains heavy metal ions and other harmful chemicals. If it is discharged directly without proper treatment, it will cause irreversible damage to the water ecosystem; waste gas may contain volatile organic compounds and toxic gases, posing a threat to air quality; waste residue is mostly solid waste containing heavy metals, which will pollute the soil environment for a long time if not properly handled. These environmental problems not only affect the ecological balance, but also increase the environmental protection treatment costs of enterprises, forcing enterprises to bear a heavy environmental burden while pursuing economic benefits, which seriously restricts the pace of green and low-carbon transformation.

[0005] Regarding cost issues: First, the electroplating process itself requires a lot of equipment, energy and raw materials, resulting in high production costs. Secondly, in order to ensure that the accuracy and performance of the phase shifter meet the design requirements, the electroplating process needs to strictly control various process parameters, such as current density, electroplating time, solution temperature, etc., which undoubtedly increases the complexity of the production process and the difficulty of operation. Furthermore, the electroplated phase shifter often requires additional cleaning, drying and inspection processes, which further increases the production cost. In addition, since the electroplating layer increases the weight of the phase shifter, it is not only not conducive to the lightweight design of the base station equipment, but may also increase the difficulty and cost during transportation and installation.

[0006] Therefore, the existing extrusion molding and post-plating process in the manufacturing of phase shifter cavities has significant disadvantages in terms of environmental protection and cost. With the deepening of the global green and low-carbon development trend and the higher requirements of mobile communication networks on base station antenna performance and cost-effectiveness, exploring a more environmentally friendly, economical and efficient phase shifter cavity manufacturing method has become a focus of common concern within and outside the industry. Summary of the invention

[0007] The primary objective of the present invention is to solve at least one of the above problems and provide a cavity assembly and a phase shifter.

[0008] In order to meet the various objectives of the present invention, the present invention adopts the following technical solutions:

[0009] A cavity assembly is provided to meet one of the purposes of the present invention, including a metal cavity, which is formed by an integral sheet metal of a metal plate, and the metal plates are bent sequentially along the same axis to surround and form multiple side walls in the circumferential direction of the metal cavity, and at least one end of the metal plate on the same axis constitutes a closed portion, which is located outside the inner cavity of the metal cavity and is fitted or connected to one of the side walls of the metal cavity so that the inner cavity constitutes an electromagnetic shielding cavity, and a plurality of open-circuit branches are loaded on the closed portion.

[0010] Furthermore, the open branch makes the electrical connection between the sealed portion and the corresponding side wall equivalent to a short circuit.

[0011] In one embodiment, the open branch is stacked with the section, and the open branch includes one or more extension segments, and the multiple extension segments are connected in sequence.

[0012] Furthermore, an insulating member is provided between the sealed portion and the corresponding side wall, and the insulating member separates the sealed portion and the corresponding side wall so that the sealed portion and the corresponding side wall are coupled and connected.

[0013] Specifically, the sealing portion and the corresponding side wall are stacked together, and the sealing portion is farther away from the inner cavity than the corresponding side wall.

[0014] In one embodiment, a partition plate is provided in the inner cavity so that the inner cavity is divided into two parts, the partition plate is a part of the metal plate, the other end of the metal plate is arranged on the partition plate, the other end is provided with a plug-in portion, the metal cavity is provided with a second side wall arranged opposite to the plug-in portion, the two side walls are provided with plug-in holes, and the plug-in portion is plugged into the plug-in hole.

[0015] In one embodiment, the cavity assembly further includes a plurality of fixing seats, each of which is provided with a fixing ring, the fixing ring is provided with an axial section of the metal cavity, and the plurality of fixing seats are sequentially arranged along the axial direction of the metal cavity.

[0016] Furthermore, the multiple fixing seats include end fixing seats arranged at both ends of the metal cavity and one or more intermediate fixing seats arranged between the two end fixing seats, a separating ring is provided inside the fixing ring of the end fixing seat, an inter-ring gap is formed between the fixing ring and the separating ring, and the end of the metal cavity is inserted into the inter-ring gap of the corresponding end fixing seat.

[0017] Furthermore, a sealing plate is provided on a side of the end fixing seat away from the metal cavity, and the sealing plate closes one side of the fixing ring of the end fixing seat to cooperate to form a blind hole.

[0018] Specifically, the sealing plate is provided with a wiring hole and an extension hole, the wiring hole is used to introduce an external cable into the metal cavity, and the extension hole is used to introduce a moving part into the metal cavity.

[0019] In one embodiment, a clamping assembly is disposed on the fixing seat, and the clamping assembly includes an elastic abutment mechanism, and the elastic abutment mechanism is used to abut against an external plate-like structure installed in the inner cavity.

[0020] Furthermore, a fixing groove is provided on the fixing seat, and the elastic abutment mechanism includes an elastic element and an abutment member arranged in the fixing groove, two sides of the elastic element are respectively connected to the bottom of the fixing groove and the abutment member, and the abutment member is used to abut against an external plate-like structure installed in the inner cavity.

[0021] Furthermore, the fixing seat is also provided with supporting feet, the fixing ring is arranged on the supporting feet, and the supporting feet of the plurality of fixing seats cooperate with each other to support the metal cavity, so that the metal cavity is suspended.

[0022] In one embodiment, a wiring groove is provided on the side wall of the metal cavity, and a metal coating is provided on the groove wall of the wiring groove.

[0023] A phase shifter is provided to meet one of the purposes of the present invention, including a phase shift component and a cavity component as described in any one of the preceding purposes, wherein the phase shift component is disposed in an inner cavity of a metal cavity of the cavity component.

[0024] Furthermore, the phase shifting component includes a circuit board and multiple pairs of fixing parts, the circuit board is provided with a power division network, the multiple pairs of fixing parts are arranged in sequence along the axial direction of the circuit board, the two fixing parts of each pair of fixing parts are arranged opposite to each other and are arranged on both sides of the axial direction of the circuit board, the fixing parts are fixedly connected to the circuit board, and the multiple pairs of fixing parts cooperate to support the circuit board in the inner cavity.

[0025] Furthermore, the fixing member includes a clamping portion and a connecting portion, the clamping portion is clamped and matched with the circuit board, and the connecting portion is matched and connected with the side wall of the metal cavity.

[0026] Specifically, a wiring groove is provided on the side wall of the metal cavity, and the wiring groove is recessed from the outer surface of the side wall to the inner surface of the side wall to form an arc-shaped groove bottom, and the shape of the connecting part matches the shape of the groove bottom of the wiring groove so that the connecting part is embedded in the groove bottom of the wiring groove.

[0027] Compared with the prior art, the present invention has many advantages, including but not limited to:

[0028] (1) The metal cavity of the cavity assembly of the present invention adopts metal plate integrated sheet metal forming technology, completely abandoning the traditional electroplating process. This not only avoids the "three industrial wastes" such as waste water, waste gas and waste residue generated during the electroplating process, significantly reducing pollution to the environment, but also saves the equipment, energy and raw material input required for electroplating, thereby reducing environmental protection treatment costs and production costs, which is in line with the global green and low-carbon development trend and is conducive to promoting the green manufacturing of mobile communication network base station antennas.

[0029] (2) As an important component of the cavity assembly, the sealed part forms a close contact with the side wall through the bending and bonding process, which effectively prevents the invasion of harmful substances such as dust and moisture in the external environment, and also provides a solid physical barrier for the shielding of electromagnetic waves. This high-sealing design significantly reduces the risk of electromagnetic wave leakage and ensures the purity and stability of the electromagnetic environment inside the cavity. The existence of the sealed part also enhances the electromagnetic shielding effect of the cavity. When electromagnetic waves try to penetrate the cavity, they will encounter a dense barrier composed of metal plates, which have good reflection and absorption effects on electromagnetic waves, thereby effectively preventing the leakage and interference of electromagnetic waves. This electromagnetic shielding effect is crucial for protecting sensitive components inside the cavity (such as the phase shifter component of the phase shifter) from external electromagnetic noise.

[0030] (3) The open branch can form an equivalent short-circuit path between the sealed part and the side wall. This design effectively suppresses the leakage of electromagnetic waves and enhances the overall electromagnetic shielding effectiveness of the cavity assembly. In the field of communications, this feature is particularly important because it can ensure that electronic components loaded in metal cavities are protected from external electromagnetic interference, while preventing internal signals from radiating outward, thereby ensuring the stability and security of the communication system.

[0031] (4) The closed part and the open branch work together to provide a stable and controllable electromagnetic environment for the phase shifter. In this environment, the phase shifter can accurately achieve the phase adjustment function while maintaining high stability and reliability. Since the leakage and interference of electromagnetic waves are effectively controlled, the phase error and fluctuation range of the phase shifter are reduced, thereby improving the overall performance of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0033] Figure 1 It is a schematic structural diagram of the metal plate mentioned in a typical embodiment of the present invention.

[0034] Figure 2 Schematic diagram of the structure of the cavity assembly of a typical embodiment of the present invention.

[0035] Figure 3 Schematic diagram of a cross-section of a cavity assembly according to a typical embodiment of the present invention.

[0036] Figure 4 The figure is a top view of a cavity assembly according to an embodiment of the present invention.

[0037] Figure 5 It is a schematic structural diagram of a metal plate mentioned in another embodiment of the present invention.

[0038] Figure 6 It is a schematic structural diagram of a cavity assembly according to another embodiment of the present invention.

[0039] Figure 7 for Figure 6 An enlarged schematic diagram of part A.

[0040] Figure 8 FIG. 4 is a schematic structural diagram of a phase shifter according to an embodiment of the present invention.

[0041] Fig. 9 FIG. 1 is a cross-sectional schematic diagram of a phase shifter at a first viewing angle according to an embodiment of the present invention.

[0042] Fig.10 for Fig. 9 An enlarged schematic diagram of part B.

[0043] Fig.11 FIG. 1 is a cross-sectional schematic diagram of a phase shifter according to an embodiment of the present invention at a second viewing angle.

[0044] Fig.12 for Fig.11 An enlarged schematic diagram of part D.

[0045] Fig.13 for Fig.11 Schematic diagram of enlarged portion C.

[0046] Fig.14 FIG. 4 is a side view of a phase shifter according to an embodiment of the present invention.

[0047] Fig.15 The figure is a schematic diagram of the assembly between a circuit board of a phase shifter and a plurality of pairs of fixing members according to an embodiment of the present invention.

[0048] Fig.16 It is a schematic structural diagram of a fixing member of a cavity assembly according to an embodiment of the present invention.

[0049] Fig.17 The figure is a schematic diagram of assembling a cavity assembly and a coaxial cable according to an embodiment of the present invention.

[0050] Fig.18 This is a schematic diagram of assembling a cavity assembly and a coaxial cable according to another embodiment of the present invention.

[0051] Fig.19 This is a schematic diagram of assembling a cavity assembly and a coaxial cable according to yet another embodiment of the present invention.

[0052] Fig. 20 The figure is a schematic diagram of assembling a cavity assembly and a coaxial cable according to another embodiment of the present invention. DETAILED DESCRIPTION

[0053] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and cannot be interpreted as limiting the present invention.

[0054] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0055] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as herein.

[0056] The present invention provides a cavity assembly, the metal cavity of which is integrally formed by metal plate sheet metal to reduce the production cost of the metal cavity, and when the metal cavity is used as the cavity of a phase shifter, the metal cavity does not need to be electroplated to further save processing costs and avoid environmental pollution caused by electroplating.

[0057] In an exemplary embodiment of the present invention, Figure 1 and Figure 2 The cavity assembly 100 includes a metal cavity 200, which is formed by an integral sheet metal of a metal plate 300, that is, the metal cavity 200 is an integral structure, and the metal cavity 200 is generally used as a cavity of communication equipment, such as a phase shifter, a power divider, a combiner, and the like. The metal cavity 200 does not require electroplating, thereby reducing pollution to the environment and achieving green development.

[0058] The metal plate 300 is bent along the same axis, which is referred to as the first axis for ease of description. The first axis is the axis in the longitudinal direction or the axis in the width direction of the metal plate 300. The metal plates 300 are bent sequentially along the first axis to enclose and form the metal cavity 200, and the circumferential side walls 210 of the metal cavity 200 are different sections on the first axis of the metal plate 300.

[0059] The metal plate 300 may be in different shapes, such as a rectangle, an ellipse, etc., and the metal plate 300 may surround a metal cavity 200 having a rectangular, pentagonal, or hexagonal cross section, etc. In this embodiment, the metal plate 300 is rectangular, and the metal plate 300 is bent along the first axis to form a cubic metal cavity 200 as an example to describe the present invention, but this should not be construed as limiting the present invention.

[0060] The two ends of the metal plate 300 on the first axis are the first end 310 and the second end 320. When the metal plate 300 is processed into the metal cavity 200 by sheet metal processing, the first end 310 and / or the second end 320 are fitted or connected to one of the side walls 210 of the metal cavity 200, so that the metal cavity 200 is closed, that is, the metal cavity 200 is a closed cavity, and the inner cavity 270 of the metal cavity 200 constitutes an electromagnetic shielding cavity. When the inner cavity 270 constitutes an electromagnetic shielding cavity, the electronic components of the communication device disposed in the inner cavity 270 can be protected from external electromagnetic interference, so that the communication device can work well. For example, when the communication device is a phase shifter, the phase shifting component of the phase shifter is disposed in the inner cavity 270, and can shield external electromagnetic interference through the metal cavity 200, so that the phase shifter can work well.

[0061] In this embodiment, the first end portion 310 is disposed outside the inner cavity 270 of the metal cavity 200, and is in contact with or connected to one of the side walls 210 of the metal cavity 200, and the second end portion 320 is disposed in the inner cavity 270 of the metal cavity 200 as an example to describe the present invention, but it should not be understood as a limitation to the present invention.

[0062] In this embodiment, the first end portion 310 constitutes a sealed portion 220, and the sealed portion 220 and one of the side walls 210 of the metal cavity 200 (the side wall 210 is called the first side wall 211) are stacked up and down, so that the sealed portion 220 and the first side wall 211 are in contact with each other to close the metal cavity 200, and the sealed portion 220 and the first side wall 211 are directly electrically connected, so that the metal cavity 200 constitutes an electromagnetic shielding cavity.

[0063] In one embodiment, since the sealed portion 220 and the first side wall 211 are stacked up and down, a gap may exist between a partial area of ​​the sealed portion 220 and a partial area of ​​the first side wall 211. The existence of the gap will affect the electrical stability between the sealed portion 220 and the first side wall 211, thereby affecting the electromagnetic shielding performance of the metal cavity 200.

[0064] In this embodiment, combined with Figure 3 An insulating member 110 is further provided between the sealing portion 220 and the first side wall 211, and the sealing portion 220 and the first side wall 211 are separated by the insulating member 110. The sealing portion 220 and the first side wall 211 are coupled and connected, which is equivalent to a short circuit, so as to solve the problem that a gap may exist due to direct bonding between the sealing portion 220 and the first side wall 211, and the gap affects the electromagnetic stability, so that the sealing portion 220 and the first side wall 211 are stably coupled and connected, so that the sealing portion 220 and the first side wall 211 are stably electrically connected, and thus the electromagnetic shielding performance of the metal cavity 200 is maintained stable.

[0065] In this embodiment, it is recommended that the insulating member 110 is a plate-shaped structure. The thickness of the insulating member 110 is greater than or equal to the width of the gap between the sealing portion 220 and the first side wall 211, so that the sealing portion 220, the insulating member 110 and the first side wall 211 are closely connected to eliminate the gap between the sealing portion 220, the insulating member 110 and the first side wall 211, so that the electromagnetic shielding performance of the metal cavity 200 is maintained stable.

[0066] In an exemplary embodiment of the present invention, Figure 2 , the sealed portion 220 is loaded with a plurality of open branches 230, the open branches 230 and the first side wall 211 are stacked up and down, the open branches 230 and the first side wall 211 are directly attached and electrically connected, or the open branches 230 and the first side wall 211 are coupled and connected to strengthen the electrical connection between the sealed portion 220 and the first side wall 211, and improve the electromagnetic shielding effect of the metal cavity 200. It can be understood that because the open branches 230 are arranged on the sealed portion 220, the electrical connection between the open branches 230 and the first side wall 211 can strengthen the electrical connection between the sealed portion 220 and the first side wall 211, so that the electrical connection is further equivalent to a short circuit, so as to improve the electromagnetic shielding effect of the metal cavity 200.

[0067] In this embodiment, combined with Figure 3It is recommended that the open branch 230 is coupled and connected to the first side wall 211, and the insulating member 110 is also disposed between the open branch 230 and the first side wall 211 to avoid contact between the open branch 230 and the first side wall 211, so as to improve the third-order intermodulation index of the metal cavity 200.

[0068] Combination Figure 2 The multiple open branches 230 are arranged in sequence along the axial direction of the metal cavity 200, and the multiple open branches 230 are electrically connected to each section of the first side wall 211, so that the sealing part 220 and the first side wall 211 are evenly electrically connected, thereby improving the electromagnetic shielding effect of the metal cavity 200.

[0069] In one embodiment, the metal cavity 200 is a cavity of a phase shifter 400 , and the length of the open-circuit branch 230 is one quarter of the wavelength of the operating frequency of the phase shifter 400 .

[0070] In one embodiment, the open branch 230 includes one or more extension segments 231, and the extension segment 231 is a straight structure or a curved structure. When the open branch 230 includes one extension segment 231, the open branch 230 is a straight structure or a curved structure. Figure 4 When the open branch 230 includes a plurality of extension segments 231, the plurality of extension segments 231 are sequentially connected to form a multi-segment bending structure. For example, the open branch 230 includes two extension segments 231, both of which are straight-line structures, and the two extension segments 231 are connected to form the open branch 230 of an L-shaped structure.

[0071] In one embodiment, in combination Figure 5 , Figure 6 and Figure 7 The second end portion 320 of the metal plate 300 is horizontally placed in the inner cavity 270 of the metal cavity 200 to form a partition plate 240, and the inner cavity 270 is divided into two accommodating cavities 271. Both of the two accommodating cavities 271 can be used to install electronic components of communication equipment. For example, when the metal cavity 200 acts as the cavity of the phase shifter 400, the phase shifter 400 has two phase shifting components, and the two phase shifting components are respectively arranged in the two accommodating cavities 271, so that the two phase shifting components are separately arranged to perform phase shifting respectively.

[0072] In this embodiment, the second end portion 320 is disposed opposite to the second side wall 212 of the metal cavity 200, and an inserting portion 321 is provided on the second end portion 320. An inserting hole 2121 is provided on the second side wall 212, and the inserting portion 321 is inserted into the inserting hole 2121 to fix the second end portion 320, so that the second end portion 320 can stably separate the inner cavity 270, thereby maintaining the structural stability of the metal cavity 200. In this embodiment, it is recommended that the inserting portion 321 is an inserting protrusion.

[0073] The second end portion 320 is provided with a plurality of plug-in portions 321, and the plurality of plug-in portions 321 are arranged in sequence along the axial direction of the metal cavity 200. The second side wall 212 is correspondingly provided with a plurality of plug-in holes 2121, and the plurality of plug-in holes 2121 are also arranged in sequence along the axial direction of the metal cavity 200. The plurality of plug-in portions 321 are respectively and correspondingly inserted into the plurality of plug-in holes 2121, so as to further stably connect the second end portion 320 with the second side wall 212, so as to improve the structural stability of the metal cavity 200.

[0074] In a typical embodiment of the present invention, the cavity assembly 100 also includes a plurality of fixing seats 120, which are used to fix an axial section of the metal cavity 200. The plurality of fixing seats 120 are arranged in sequence and spaced apart along the axial direction of the metal cavity 200 to respectively fix the plurality of sections of the metal cavity 200, so that the metal cavity 200 is fixed as a whole, avoiding the existence of a gap between the sealed portion 220 and the first side wall 211 in some sections of the metal cavity 200, maintaining the structural stability of the metal cavity 200, and maintaining the electromagnetic shielding performance of the metal cavity 200 stable.

[0075] Specifically, combined Figure 8 The fixing seat 120 includes a fixing ring 121 and a supporting leg 122, and the fixing ring 121 is disposed on the supporting leg 122. Fig. 9 and Fig.10 A fixing hole 1211 is provided in the fixing ring 121, and the shape and size of the cross section of the fixing hole 1211 are the same as the shape and size of the cross section of the metal cavity 200 in the axial direction, so that a section of the metal cavity 200 can be inserted into the fixing hole 1211, and because the fixing hole 1211 can clamp the metal cavity 200, when the metal cavity 200 is subjected to external force, the sealing portion 220 of the metal cavity 200 will not be separated from the first side wall 211, thereby maintaining the structural stability of the metal cavity 200, and further maintaining the electromagnetic shielding performance of the metal cavity 200 stable.

[0076] The multiple fixing seats 120 are arranged at intervals along the axial direction of the metal cavity 200, and the fixing rings 121 of the multiple fixing seats 120 are respectively clamped on one of the axial sections of the metal cavity 200. Therefore, under the action of the multiple fixing seats 120, the sealed portion 220 of the metal cavity 200 will not be separated from the first side wall 211 in any section, thereby further maintaining the structural stability of the metal cavity 200.

[0077] Combination Figure 8 The support legs 122 of the fixing seat 120 are used to support the fixing ring 121, so that the metal cavity 200 bound by the fixing ring 121 is located on the support legs 122. Under the action of the support legs 122 of each of the plurality of fixing seats 120, the metal cavity 200 is suspended. When the metal cavity 200 is set in an environment such as a base station antenna, the electromagnetic interference between the metal cavity 200 and other communication devices of the base station antenna can be reduced by suspending the metal cavity 200.

[0078] In one embodiment, a fixing seat 120 is provided at each of the two axial ends of the metal cavity 200, and the fixing seat provided at the end 250 of the metal cavity 200 is referred to as an end fixing seat 130. Fig.10 , Fig.11 and Fig.12 The fixing ring 131 of the end fixing seat 130 is also provided with a separator ring 132, that is, the separator ring 132 is arranged in the fixing hole 1211 of the fixing ring 131, and a gap is formed between the separator ring 132 and the fixing ring 131, which is called an inter-ring gap 133. The separator ring 132 is co-centered with the fixing ring 131, and the inter-ring gap 133 can be understood as an annular hole.

[0079] The end 250 of the metal cavity 200 can be inserted into the inter-annular gap 133, and the inter-annular gap 133 is used to limit the circumferential side walls 210 of the metal cavity 200 to further maintain the structural stability of the metal cavity 200. In this embodiment, it is recommended that the width of the inter-annular gap 133 is the same as the thickness of the side wall 210, so that the side wall 210 and the inter-annular gap 133 are closely matched, so that the multiple side walls 210 are fixed by the inter-annular gap 133.

[0080] An end fixing seat 130 is respectively provided at both axial ends of the metal cavity 200, and multiple side walls 210 of the metal cavity 200 on the circumferential direction are fixed by the two end fixing seats 130, so that the structure of the metal cavity 200 is stable, so that the electromagnetic shielding performance of the metal cavity 200 is maintained stable.

[0081] In a further embodiment, in combination Fig.12The end fixing seat 130 is also provided with a sealing plate 134, and the sealing plate 134 is used to close the fixing hole 1211 of the end fixing seat 130, so that the fixing hole 1211 forms a blind hole structure. Specifically, the sealing plate 134 is arranged on a side of the fixing hole 1211 away from the end 250 of the metal cavity 200.

[0082] When the metal cavity 200 is inserted into the fixing hole 1211, the end 250 of the metal cavity 200 is sealed by the sealing plate 134, that is, the sealing plate is used as the axial side wall of the metal cavity 200. The sealing plates 134 of the two end fixing seats 130 respectively seal the openings at both ends of the metal cavity 200 in the axial direction, so that the metal cavity 200 forms a closed cavity, preventing external electromagnetic waves from entering the metal cavity 200 through the openings at both ends of the metal cavity 200, so as to further improve the electromagnetic shielding performance of the metal cavity 200.

[0083] In one embodiment, in combination Figure 8 The sealing plate 134 is provided with a wiring hole 135, and an external cable can enter the metal cavity 200 through the wiring hole 135. For example, when the metal cavity 200 is used as the cavity of the phase shifter 400, the external cable can enter the metal cavity 200 through the wiring hole 135, and the external cable is electrically connected to the phase shift component disposed in the metal cavity 200.

[0084] In one embodiment, in combination Fig.12 The sealing plate 134 is also provided with an extension hole 136. When the metal cavity 200 is used as the cavity of the phase shifter 400, the moving component 430 can enter the metal cavity 200 through the extension hole 136. The moving component 430 is connected to the phase shift component disposed in the metal cavity 200. The moving component 430 can be driven to move the phase shift component so that the phase shift component performs phase shifting. For example, the moving component 430 is connected to the active dielectric plate of the phase shift component. The moving component 430 drives the active dielectric plate to move relative to the fixed dielectric plate so that the phase shift component performs phase shifting.

[0085] In one embodiment, among the plurality of fixing seats 120 , one or more fixing seats between the two end fixing seats 130 are intermediate fixing seats 140 , and the intermediate fixing seats 140 are used to fix other sections of the metal cavity 200 except for the two ends.

[0086] In one embodiment, it is recommended that the metal cavity 200 is made of aluminum alloy.

[0087] In one embodiment, in combination Fig.14, at least one side wall 210 of the metal cavity 200 is further provided with a wiring groove 260, and the wiring groove 260 is recessed from the outer surface of the side wall 210 to the inner surface of the side wall 210 to form the wiring groove 260. A metal coating is provided on the groove wall of the wiring groove 260. When the coaxial cable 510 is accommodated in the wiring groove 260, since the groove wall of the wiring groove 260 is provided with a metal coating, the coaxial cable 510 can be welded to the wiring groove 260 to fix the coaxial cable 510 on the wiring groove 260. When the metal cavity 200 is used as the cavity of the phase shifter 400, the coaxial cable can enter the metal cavity 200 through the wiring hole 135, and the coaxial cable 510 is electrically connected to the phase shift component arranged in the metal cavity 200.

[0088] In this embodiment, it is recommended to use ion beam plating technology to set the metal material on the groove wall of the wiring groove 260 to form a metal coating on the groove wall of the wiring groove 260. In this embodiment, it is recommended that the metal coating is a copper coating. Through the ion beam plating technology, the metal cavity 200 does not need to be electroplated, so as to reduce the processing steps of the metal cavity 200 and reduce the pollution to the environment.

[0089] In a further embodiment, in combination Fig.17 and Fig.18 A lead hole 261 is provided in the bottom of the wiring slot 260 of the metal cavity 200, and the coaxial cable 510 can enter the interior of the metal cavity 200 through the lead hole 261. When the coaxial cable 510 is welded to the wiring slot 260, the coaxial cable 510 is bent at the lead hole 261 so that the coaxial cable 510 can enter the interior of the metal cavity 200.

[0090] When the metal cavity 200 has an inner cavity 270, a wiring groove 260 is formed on the side wall 210 of the metal cavity 200, and a plurality of lead holes 261 are provided on the wiring groove 260 to introduce a plurality of coaxial cables 510 into the inner cavity 270 of the metal cavity 200. When the inner cavity 270 of the metal cavity 200 is divided into the two accommodating cavities 271, two wiring grooves 260 are provided on the side wall 210 of the metal cavity 200, each wiring groove 260 corresponds to one accommodating cavity 271, and each wiring groove 260 is provided with a plurality of lead holes 261.

[0091] In a further embodiment, both opposite side walls 210 of the metal cavity 200 may be provided with wiring slots 260, and each wiring slot 260 may be provided with a lead hole 261. Alternatively, the wiring slot 260 on one side wall of the metal cavity 200 may be provided with a lead hole 261, and the wiring slot 260 on the other side wall may not be provided with a lead hole 261.

[0092] In another embodiment, in combination Fig.19 and Fig. 20 , the side wall 210 of the metal cavity 200 is not provided with a wiring groove 260, but the side wall 210 is provided with a lead hole 261, and the coaxial cable 510 can be vertically arranged relative to the side wall 210, and pass through the corresponding lead hole 261 to enter the interior of the metal cavity 200. When the metal cavity 200 has an inner cavity 270, a plurality of lead holes 261 are formed on the side wall 210 of the metal cavity 200 to introduce a plurality of coaxial cables 510 into the inner cavity 270 of the metal cavity 200. When the inner cavity 270 of the metal cavity 200 is divided into the two accommodating cavities 271, a plurality of lead holes 261 are respectively provided on the side wall 210 of the metal cavity 200 corresponding to the two accommodating cavities 271 to introduce a plurality of coaxial cables 510 into the two accommodating cavities 271. In this embodiment, since the coaxial cable 510 does not need to be fixed on the side wall 210 of the metal cavity 200 , the metal cavity 200 does not need to be electroplated, and a metal coating does not need to be provided on the side wall 210 .

[0093] In a further embodiment, both opposite side walls 210 of the metal cavity 200 may be provided with lead holes 261. Alternatively, one side wall of the metal cavity 200 may be provided with a lead hole 261, while the other side wall may not be provided with a lead hole 261.

[0094] The present invention further provides a phase shifter 400 , which includes a phase shift component and the cavity component 100 described above. The phase shift component is disposed in the inner cavity 270 of the metal cavity 200 of the cavity component 100 , and the metal cavity 200 is used to shield external electromagnetic interference.

[0095] Combination Fig.14 The phase shifting component includes a circuit board 411 or a dielectric board, and a power splitting network is provided on the circuit board 411. The circuit board 411 is disposed in the inner cavity 270. Fig.14 and Fig.15 In order to facilitate fixing the circuit board 411 , the phase shifting assembly is further provided with a plurality of pairs of fixing members 420 , and the circuit board 411 is fixed by the plurality of pairs of fixing members 420 .

[0096] Specifically, one side of the fixing member 420 is fixedly connected to the side wall 210 of the metal cavity 200, and the other side of the fixing member 420 is fixedly connected to the edge 4111 of the circuit board 411. Each pair of fixing members 420 is arranged on both sides of the axial direction of the circuit board 411, and multiple fixing members 420 are arranged in sequence along the axial direction of the circuit board 411, so that the circuit board 411 can be stably arranged in the inner cavity 270.

[0097] Combination Fig.16 The fixing member 420 is provided with a clamping portion 421, and the clamping portion 421 is clamped with the edge 4111 of the circuit board 411, so that the fixing member 420 is fixed to the circuit board 411. Specifically, a first clamping groove (not shown) is provided on the edge 4111 of the circuit board 411, and the clamping portion 421 is plugged into the first clamping groove, so that the circuit board 411 and the fixing member 420 are fixed. In addition, the fixing member 420 is further provided with a second clamping groove 423, and the second clamping groove 423 is arranged adjacent to the clamping portion 421, and the edge 4111 of the circuit board 411 is inserted into the second clamping groove 423, so that the circuit board 411 and the fixing member 420 are further fixed.

[0098] In one embodiment, in combination Fig.14 The wiring groove 260 is recessed from the outer surface of the side wall 210 to the inner surface of the side wall 210 to form the wiring groove 260, and the shape of the inner surface also corresponds to the shape of the wiring groove 260. For example, the wiring groove 260 is an arc-shaped structure, and the inner surface is also an arc-shaped structure.

[0099] Combination Fig.14 and Fig.16 The fixing member 420 is further provided with a connecting portion 422, the shape of which corresponds to the shape of the inner surface of the wiring slot 260, so that the connecting portion 422 can be embedded with the inner surface of the connecting slot to limit the fixing member 420, so that the fixing member 420 can be stably arranged in the inner cavity 270. For example, because the wiring slot 260 is an arc-shaped slot, the corresponding inner surface is an arc-shaped protruding structure, and the connecting portion 422 is an arc-shaped slot structure, and the connecting portion 422 is embedded with the inner surface.

[0100] In one embodiment, in combination Fig.10 A pair of plug-in grooves 137 are also provided on the separation ring 132 of the end fixing seat 130. The pair of plug-in grooves 137 are respectively provided on both sides of the separation ring 132. The two edges 4111 of the circuit board 411 can be respectively inserted into the pair of plug-in grooves 137 to further fix the circuit board 411.

[0101] In one embodiment, the metal cavity 200 is divided by the partition plate 240 formed by the second end 320 of the metal plate 300, so that the inner cavity 270 of the metal cavity 200 is divided into two accommodating cavities 271. The phase shifter 400 can be provided with two phase shifting components, and the two phase shifting components are respectively arranged in the two accommodating cavities 271.

[0102] In one embodiment, in combination Fig.11 and Fig.13 The intermediate fixing seat 140 is further provided with a clamping assembly, and the clamping assembly includes at least one elastic abutment mechanism 142. The following describes this embodiment by taking the clamping assembly including one elastic abutment mechanism 142 as an example. The one elastic abutment mechanism 142 is arranged in the fixing ring 141 of the intermediate fixing seat 140.

[0103] Specifically, a fixing groove 1411 is provided in the fixing ring 141, and the fixing groove 1411 is a blind groove, and the opening of the fixing groove 1411 faces the circuit board 411 or the dielectric plate. The elastic abutment mechanism 142 is provided in the fixing groove 1411, and a through hole is provided in the side wall 210 of the metal cavity 200 corresponding to the elastic abutment mechanism 142, so that the elastic abutment mechanism 142 can extend into the metal cavity 200 through the through hole, and the elastic abutment mechanism 142 applies an elastic abutment force to the circuit board 411 or the dielectric plate installed in the metal cavity 200, so that the circuit board 411 or the dielectric plate is stably arranged in the inner cavity 270.

[0104] The elastic abutment mechanism 142 includes an elastic element 1421 and an abutment member 1422. The two ends of the elastic element 1421 are respectively connected to the bottom of the fixing groove 1411 and the abutment member 1422. The abutment member 1422 abuts against the circuit board 411 or the dielectric plate. The elastic element 1421 applies an elastic force to the abutment member 1422, so that the abutment member 1422 can apply the elastic force to the circuit board 411 or the dielectric plate, so that the circuit board 411 or the dielectric plate is stably arranged in the inner cavity 270. In this embodiment, it is recommended that the elastic element 1421 is a rubber ring, a spring, or a bellows, and the abutment member 1422 is a roller, a ball, or a drum.

[0105] In one embodiment, the clamping mechanism may be configured with two elastic abutment mechanisms 142 , which respectively abut against two phase shifting components disposed in two accommodating cavities 271 , so that the two phase shifting components are stably disposed in the inner cavity 270 .

[0106] In summary, the present invention simplifies the manufacturing process of the metal cavity by forming the metal cavity from an integrated sheet metal of a metal plate, and the metal cavity does not need to be electroplated, which can reduce production costs, achieve green development, and protect the ecological environment.

[0107] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with the technical features with similar functions invented in the present invention (but not limited to) to form a technical solution.

[0108] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

Claims

1. A cavity assembly, It is characterized in that The invention comprises a metal cavity, which is formed by an integral sheet metal of a metal plate. The metal plates are bent in sequence along the same axis to surround and form a plurality of side walls in the circumferential direction of the metal cavity. At least one end of the metal plate on the same axis constitutes a closed portion, which is located outside the inner cavity of the metal cavity and is fitted or connected to one of the side walls of the metal cavity so that the inner cavity constitutes an electromagnetic shielding cavity, and a plurality of open-circuit branches are loaded on the closed portion.

2. The chamber assembly according to claim 1, It is characterized in that The open branch makes the electrical connection between the sealed portion and the corresponding side wall equivalent to a short circuit.

3. The chamber assembly according to claim 2, It is characterized in that The open branch is stacked with the section, and the open branch includes one or more extension segments, and the multiple extension segments are connected in sequence.

4. The chamber assembly according to claim 1, It is characterized in that An insulating member is provided between the sealed portion and the corresponding side wall, and the insulating member separates the sealed portion and the corresponding side wall so that the sealed portion and the corresponding side wall are coupled and connected.

5. The chamber assembly according to claim 4, It is characterized in that The sealing portion is stacked with the corresponding side wall, and the sealing portion is farther away from the inner cavity than the corresponding side wall.

6. The chamber assembly according to claim 1, It is characterized in that A partition plate is provided in the inner cavity, so that the inner cavity is divided into two. The partition plate is a part of the metal plate. The other end of the metal plate is arranged on the partition plate. The other end is provided with a plug-in portion. The metal cavity is provided with a second side wall arranged opposite to the plug-in portion. The two side walls are provided with plug-in holes, and the plug-in portion is plugged into the plug-in hole.

7. The chamber assembly according to any one of claims 1 to 6, It is characterized in that The cavity assembly further comprises a plurality of fixing seats, each of which is provided with a fixing ring, and the fixing ring is provided with an axial section of the metal cavity, and the plurality of fixing seats are sequentially arranged along the axial direction of the metal cavity.

8. The chamber assembly according to claim 7, It is characterized in that The multiple fixing seats include end fixing seats arranged at both ends of the metal cavity and one or more intermediate fixing seats arranged between the two end fixing seats. A separating ring is provided inside the fixing ring of the end fixing seat, and an inter-ring gap is formed between the fixing ring and the separating ring. The end of the metal cavity is inserted into the inter-ring gap of the corresponding end fixing seat.

9. The chamber assembly according to claim 8, It is characterized in that A sealing plate is provided on one side of the end fixing seat away from the metal cavity, and the sealing plate closes one side of the fixing ring of the end fixing seat to cooperate to form a blind hole.

10. The chamber assembly according to claim 9, It is characterized in that The sealing plate is provided with a wiring hole and an extension hole, wherein the wiring hole is used to introduce an external cable into the metal cavity, and the extension hole is used to introduce a moving part into the metal cavity.

11. The chamber assembly according to claim 6, It is characterized in that The fixing seat is provided with a clamping assembly, and the clamping assembly includes an elastic abutment mechanism, and the elastic abutment mechanism is used to abut against an external plate-like structure installed in the inner cavity.

12. The chamber assembly according to claim 11, It is characterized in that A fixing groove is provided on the fixing seat, and the elastic abutment mechanism includes an elastic element and an abutment member arranged in the fixing groove, two sides of the elastic element are respectively connected to the bottom of the fixing groove and the abutment member, and the abutment member is used to abut against an external plate-like structure installed in the inner cavity.

13. The chamber assembly according to claim 7, It is characterized in that The fixing seat is also provided with supporting feet, the fixing ring is arranged on the supporting feet, and the supporting feet of the plurality of fixing seats cooperate with each other to support the metal cavity, so that the metal cavity is suspended.

14. The chamber assembly according to claim 1, It is characterized in that A wiring groove is arranged on the side wall of the metal cavity, and a metal coating is arranged on the groove wall of the wiring groove.

15. A phase shifter, It is characterized in that It comprises a phase shift component and a cavity component as claimed in any one of claims 1 to 14, wherein the phase shift component is arranged in an inner cavity of a metal cavity of the cavity component.

16. The phase shifter according to claim 15, It is characterized in that The phase shifting component includes a circuit board and multiple pairs of fixing parts. The circuit board is provided with a power division network. The multiple pairs of fixing parts are arranged in sequence along the axial direction of the circuit board. The two fixing parts of each pair of fixing parts are arranged opposite to each other and are arranged on both sides of the axial direction of the circuit board. The fixing parts are fixedly connected to the circuit board. The multiple pairs of fixing parts cooperate to support the circuit board in the inner cavity.

17. The phase shifter according to claim 16, It is characterized in that The fixing member comprises a clamping portion and a connecting portion, the clamping portion is clamped and matched with the circuit board, and the connecting portion is matched and connected with the side wall of the metal cavity.

18. The phase shifter according to claim 17, It is characterized in that A wiring groove is provided on the side wall of the metal cavity, and the wiring groove is recessed from the outer surface of the side wall to the inner surface of the side wall to form an arc-shaped groove bottom, and the shape of the connecting part matches the shape of the groove bottom of the wiring groove so that the connecting part is embedded with the groove bottom of the wiring groove.

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