Filter, communication device, and filter manufacturing method

Abstract

The present application relates to the field of communications, and provides a filter, a communication device, and a method for manufacturing the filter. The filter includes a cavity, a resonant rod, a tuning member, and a protective member. The resonant rod is arranged inside the cavity; the tuning member includes a tuning portion and a connecting portion arranged on the periphery of the tuning portion. The tuning portion is arranged corresponding to the resonant rod, and the tuning portion can be deformed by force to change the distance of the resonant rod relative to the tuning portion, or the tuning portion can be deformed by force to change the distance of the resonant rod relative to the cavity; the protective member is arranged on the side of the connecting portion away from the cavity, the connecting portion is connected to the cavity and / or the protective member, the protective member and the tuning member jointly cover the cavity, the protective member is provided with an axially through-hole opening, and the tuning member is exposed in the opening. The filter eliminates the tuning screw structure, and the tuning member and the protective member can be thinned to a large extent, thereby compressing the height space required for components other than the cavity, expanding the designable height of the cavity, and enabling the filter to achieve higher performance indicators.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a filter, a communication device, and a method for manufacturing the filter. Background Art

[0002] Existing filters typically include a cavity, a cover plate that covers the cavity, and a tuning screw threadedly connected to the cover plate. Existing filters can adjust the frequency signal by rotating the tuning screw to adjust the depth of the tuning screw's penetration into the cavity. However, to ensure the effectiveness of the threaded connection between the cover plate and the tuning screw, the cover plate must have a certain thickness, and the tuning screw must protrude a certain height relative to the cover plate. As a result, the protruding portions of the cover plate and the tuning screw occupy a considerable amount of height space. However, the overall height requirement of the filter is usually fixed and fixed, which significantly compresses the cavity height and results in lower filter performance indicators. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a filter to solve the technical problem in existing filters that the protruding parts of the cover plate and the tuning screw need to occupy a large height space, resulting in a significant compression of the height of the cavity.

[0004] To achieve the above objectives, the technical solution adopted in this application is: a filter comprising:

[0005] cavity;

[0006] A resonant rod is disposed inside the cavity;

[0007] a tuning member disposed on a side close to the open end of the cavity, the tuning member comprising a tuning portion and a connecting portion disposed on the periphery of the tuning portion, the tuning portion being disposed corresponding to the resonant rod, the tuning portion being deformable under force to change the distance of the resonant rod relative to the tuning member, or the tuning portion being deformable under force to change the distance of the resonant rod relative to the cavity;

[0008] A protective member is arranged on a side of the connecting portion facing away from the cavity, the connecting portion is connected to the cavity and / or the protective member, the protective member and the tuning member jointly cover the cavity, the protective member is provided with an axially penetrating opening, and the tuning portion is exposed in the opening.

[0009] In one embodiment, the connecting portion is fixedly connected to both the protective element and the cavity.

[0010] In one embodiment, the connecting portion is fixedly connected to the protective member, and the connecting portion or the protective member is detachably connected to the cavity.

[0011] In one embodiment, the connecting portion and the protective member are fixedly connected by welding.

[0012] In one embodiment, the cavity body has a resonant cavity, and the tuning element covers the resonant cavity.

[0013] In one embodiment, the cavity has a resonant cavity, the connecting portion is connected to the protective member, the protective member covers the resonant cavity, and the protective member is a metal member.

[0014] In one embodiment, the connecting portion includes a first ring portion arranged on the periphery of the tuning portion, and a second ring portion arranged on the periphery of the first ring portion, the second ring portion is arranged between the protective member and the cavity, and the first ring portion can be deformed along with the tuning portion when the tuning portion is deformed by force.

[0015] In one embodiment, a ring groove is formed on a side of the cavity close to the tuning element, and the ring groove is arranged corresponding to the first ring portion, so that a side of the first ring portion facing away from the protective element serves as an air avoidance zone.

[0016] In one embodiment, at least a portion of the first ring portion and the tuning portion are exposed in the opening.

[0017] In one embodiment, the tuning part includes a tuning platform and a tuning ring connected between the tuning platform and the connecting part, the tuning ring is loosely fitted with the inner wall of the opening, and the tuning platform is integrally sealed on an end of the tuning ring away from the cavity.

[0018] In one embodiment, the cavity is provided with an installation groove for limiting the installation of the protective element; the installation groove is recessed on the corresponding side surface close to the opening direction of the cavity.

[0019] In one embodiment, the cavity is provided with an installation groove for limiting the installation of the protective element; a limiting ring is convexly provided on the corresponding side surface close to the opening direction of the cavity, and the limiting ring encloses to form the installation groove.

[0020] In one embodiment, a waterproof structure is provided at the connection between the cavity and the protective element.

[0021] In one embodiment, the opening is a threaded hole.

[0022] In one embodiment, the tuning portion is provided with an adjustment structure, and the adjustment structure can be subjected to force to cause axial displacement to drive the tuning portion to deform, and the adjustment structure does not protrude from the protective member in the axial direction.

[0023] In one embodiment, the adjustment structure is integrally formed with the tuning portion, and the adjustment structure is recessed in the tuning portion.

[0024] In one embodiment, the adjustment structure is integrally formed with the tuning portion, and the adjustment structure is protruded from the tuning portion.

[0025] In one embodiment, the adjustment structure is independently formed on the tuning part, and one end of the adjustment structure is connected to the tuning part.

[0026] In one embodiment, the adjusting structures are provided in a plurality, the plurality of adjusting structures are staggered, and one of the adjusting structures is provided at the center of the tuning portion.

[0027] An embodiment of the present application further aims to provide a communication device comprising the filter.

[0028] The present invention also aims to provide a method for manufacturing a filter, which is suitable for manufacturing the filter, comprising:

[0029] A configuration component is configured to configure the cavity, the tuning component, and the protective component, wherein the protective component is provided with the opening penetrating the protective component;

[0030] Assemble components, connect the tuning element and the protective element to the cavity, expose the tuning portion to the opening, locate the tuning element between the protective element and the cavity, and make the tuning element and the protective element cover the cavity together.

[0031] In one embodiment, in the step of assembling components, the connecting portion is first fixedly connected to the protective member, and then the connecting portion or the protective member is connected to the cavity;

[0032] Wherein, in the process of fixedly connecting the connecting portion and the protective member, the connecting portion is fixedly connected to the protective member by continuous laser welding, and the path of the continuous laser welding is a closed loop structure.

[0033] The beneficial effects provided by this application are:

[0034] The filter provided in the embodiment of the present application can, during the tuning process, apply a pushing force to the tuning part through the opening, causing the tuning part to bend and deform toward the side close to the cavity, thereby shortening the distance between the tuning part and the resonant rod, or shortening the distance between the resonant rod and the cavity; conversely, a pulling force can be applied to the tuning part through the opening, causing the tuning part to bend and deform toward the side away from the cavity, thereby increasing the distance between the tuning part and the resonant rod, or increasing the distance between the resonant rod and the cavity; based on this, the capacitance between the tuning part and the resonant rod or between the resonant rod and the cavity can be adjusted by adjusting the distance between the tuning part and the cavity, thereby achieving adjustment of the frequency signal, and the adjustment is very convenient.

[0035] Therefore, compared with the existing filter, the filter provided in the embodiment of the present application significantly eliminates the tuning screw structure of the existing filter, and on the basis of ensuring the common signal shielding effect of the tuning part and the protective part, the tuning part can be thinned to a large extent, and the protective part can also be thinned to a large extent, thereby effectively compressing the height space required to be occupied by the tuning part and the protective part, and then effectively expanding the designable height of the cavity, so that the filter can achieve higher performance indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] Figure 1 A three-dimensional schematic diagram of the filter provided in Example 1 of the present application;

[0038] Figure 2 for Figure 1 A cross-sectional view along AA is provided;

[0039] Figure 3 A flowchart of a method for manufacturing a filter provided in Example 1 of the present application;

[0040] Figure 4 A schematic diagram of the structure of the filter provided in Example 2 of the present application;

[0041] Figure 5 A schematic diagram of the structure of the filter provided in Example 4 of the present application;

[0042] Figure 6 A schematic diagram of the structure of the filter provided in Example 5 of the present application;

[0043] Figure 7 A schematic diagram of the structure of the filter provided in Example 6 of the present application;

[0044] Figure 8 A schematic diagram of the structure of the filter provided in Example 8 of the present application;

[0045] Figure 9 A schematic diagram of the structure of the filter provided in Example 10 of the present application;

[0046] Figure 10 This is a structural diagram of the filter provided in Example 11 of the present application.

[0047] Among them, the reference numerals in the figures are:

[0048] 10-cavity, 11-resonance cavity, 12-ring groove, 13-mounting groove, 14-limiting ring; 20-tuning element, 21-tuning part, 211-tuning platform, 212-tuning ring, 22-connecting part, 221-first ring part, 222-second ring part; 30-protective element, 31-opening; 40-adjustment structure; 50-resonance rod, 51-resonance disk. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0050] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0052] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0053] Existing filters generally include a cavity, a cover plate covering the cavity, and a tuning screw threadedly connected to the cover plate. Existing filters can adjust the frequency signal by rotating the tuning screw to adjust the length of the tuning screw penetrating into the cavity.

[0054] Based on this, existing filters generally have the following problems:

[0055] 1. To ensure the effectiveness of the threaded connection between the cover plate and the tuning screw, the cover plate needs to have a certain thickness, and the tuning screw needs to protrude a certain height relative to the cover plate. Therefore, the protruding parts of the cover plate and the tuning screw need to occupy a large amount of height space, while the overall height requirement of the filter is usually determined and fixed, resulting in a significant compression of the cavity height, resulting in lower performance indicators of the filter.

[0056] Second, the space reserved for filters in base stations and other communication equipment is usually limited, making it difficult for filters to meet complex multi-channel design requirements within a limited space.

[0057] 3. The filter has many parts, and to ensure performance, the cover and tuning screw must be made of metal materials with better performance, and the cover and tuning screw must also be tapped and other processes, resulting in higher material costs, processing costs and the number of parts for the filter.

[0058] 4. During the tuning process, the relative rotation between the tuning screw and the cover plate will inevitably cause burrs, debris and other impurities to fall into the cavity, which will inevitably reduce the intermodulation and power performance of the filter, and may even cause a short circuit and lead to filter failure.

[0059] Therefore, the embodiment of the present application provides a filter that eliminates the tuning screw structure, achieves miniaturization and lightweight, and reduces material and processing costs.

[0060] The following describes the specific implementation of this application in more detail with reference to specific embodiments:

[0061] Example 1

[0062] See also Figure 1 、 Figure 2 The embodiment of the present application provides a filter, including a cavity 10, a resonant rod 50, a tuning member 20 and a protective member 30. The resonant rod 50 is arranged inside the cavity 10; the tuning member 20 is arranged on a side close to the open end of the cavity 10, and the tuning member 20 includes a tuning portion 21 and a connecting portion 22 arranged on the periphery of the tuning portion 21. The tuning portion 21 is arranged corresponding to the resonant rod 50, and the tuning portion 21 can be deformed under force to change the distance between the resonant rod 50 and the tuning portion 21; the protective member 30 is arranged on a side of the connecting portion 22 away from the cavity 10, and the connecting portion 22 is connected to the cavity 10 and / or the protective member 30. The protective member 30 and the tuning member 20 jointly cover the cavity 10. The protective member 30 is provided with an opening 31 that passes through in the axial direction z, and the tuning portion 21 is exposed in the opening 31. The axial direction z mentioned throughout the text is the same as the setting direction of the resonant rod 50.

[0063] It should be noted that the cavity 10 has at least one resonant cavity 11, in which a resonant rod 50 is disposed. The resonant rod 50 is connected to the cavity 10 and is disposed opposite and corresponding to the tuning portion 21. The resonant rod 50 can be connected to the cavity 10 by screw fastening, threaded connection, welding, integral connection, riveting, crimping, or clamping, and this embodiment does not limit this.

[0064] The resonant rod 50 may be a metal resonant rod 50 , a ceramic dielectric resonant rod 50 , or a dielectric resonant rod 50 made of other materials, which is not limited in this embodiment.

[0065] Among them, the resonant rod 50 can be a hollow resonant rod 50, that is, the resonant rod 50 has a resonant hole in the form of a blind hole or a through hole (not shown in the figure); or, the resonant rod 50 can be a solid resonant rod 50, that is, the resonant rod 50 does not have a resonant hole; this embodiment does not impose any restrictions on this.

[0066] The resonant rod 50 may be provided with a resonant disk 51 or without the resonant disk 51 , and the resonant disk 51 may be provided with a flange or without a flange, which is not limited in this embodiment.

[0067] The resonant rod 50 may be a circular rod, a polygonal rod, a special-shaped rod or even other shapes, which is not limited in this embodiment.

[0068] It should also be noted that the tuning component 20 is a metal component, specifically made of a deformable, non-auto-rebound metal material, such as aluminum foil, silver foil, or metal alloy.

[0069] The connecting portion 22 of the tuning element 20 can be connected to the cavity 10, or the connecting portion 22 is connected to the protective member 30, or the connecting portion 22 is connected to the protective member 30 and the cavity 10. The tuning element 20 and the protective member 30 together cover the cavity opening of the resonant cavity 11 of the cavity 10 to achieve a shielding function, thereby forming an effective filtering cavity and preventing signal leakage.

[0070] The tuning element 20 may be a symmetrical structure or an asymmetrical structure.

[0071] There is at least one tuning component 20 provided. When there are multiple tuning components 20 , the multiple tuning components 20 are stacked in sequence along the axial direction z.

[0072] The tuning portion 21 is exposed in the opening 31 . When the tuning portion 21 bends and deforms toward the side away from the cavity 10 , the opening 31 can reserve deformation space for the tuning portion 21 .

[0073] Specifically, in the filter provided in the embodiment of the present application, during the tuning process, a thrust force can be applied to the tuning part 21 through the opening 31, so that the tuning part 21 is bent and deformed toward the side close to the cavity 10, so as to shorten the distance between the tuning part 21 and the cavity 10, especially shorten the distance between the tuning part 21 and the resonant rod 50; or, a pulling force can be applied to the tuning part 21 through the opening 31, so that the tuning part 21 is bent and deformed toward the side away from the cavity 10, so as to increase the distance between the tuning part 21 and the cavity 10, especially increase the distance between the tuning part 21 and the resonant rod 50; based on this, by adjusting the distance between the tuning part 21 and the cavity 10, that is, adjusting the distance between the tuning part 21 and the resonant rod 50, the capacitance between the tuning part 21 and the resonant rod 50 can be adjusted, thereby achieving the adjustment of the frequency signal, and the adjustment is very convenient.

[0074] Therefore, compared with the existing filter, the filter provided in the embodiment of the present application significantly eliminates the tuning screw structure of the existing filter, and on the basis of ensuring the common signal shielding effect of the tuning component 20 and the protective component 30, the tuning component 20 can be thinned to a large extent, and the protective component 30 can also be thinned to a large extent, thereby effectively compressing the height space required to be occupied by components other than the cavity 10, and then effectively expanding the designable height of the cavity 10, so that the filter can achieve higher performance indicators.

[0075] Furthermore, the filter provided by the embodiment of the present application is significantly miniaturized and lightweight, thereby being able to meet the design requirements of complex multi-channels within a limited space, that is, being suitable for forming complex multi-channel products.

[0076] Furthermore, the filter provided in the embodiment of the present application significantly reduces the number of parts and at least simplifies the tapping process, thereby effectively reducing material costs and processing costs.

[0077] Moreover, the filter provided in the embodiment of the present application will not generate burrs, debris or other impurities falling into the cavity 10 during the tuning process, and the tuning component 20 and the protective component 30 that cover the cavity 10 together can also basically restrict external impurities from entering the cavity 10 in all directions, thereby effectively ensuring and improving the intermodulation and power performance of the filter, effectively reducing the risk of filter failure due to short circuit, and thus ensuring and improving the performance of the filter, and ensuring and extending the service life of the filter.

[0078] See also Figure 1 、 Figure 2 In this embodiment, the connecting portion 22 is fixedly connected to the protective member 30 and the cavity 10 .

[0079] By adopting the above solution, the connecting portion 22 can form a direct, firm, and well-sealed connection relationship with the protective member 30 and the cavity 10, thereby achieving a better signal shielding effect and making the performance indicators of the filter more stable.

[0080] The connection portion 22 of the tuning component 20 may be fixedly connected to the protective component 30 by, but not limited to, welding, bonding, melting, riveting, or integral connection. When the connection portion 22 of the tuning component 20 is integrally connected to the protective component 30, the protective component 30 is made of the same metal material as the tuning component 20. When the connection portion 22 of the tuning component 20 is fixedly connected to the protective component 30 by a method other than integral connection, the protective component 30 may be made of a metal material or a non-metallic material, such as plastic.

[0081] The connection portion 22 of the tuning component 20 may be fixedly connected to the cavity 10 by, but not limited to, welding, bonding, melting, riveting, or the like.

[0082] See also Figure 1 、 Figure 2 In this embodiment, the connection portion 22 and the protective member 30 are fixedly connected by welding. The welding may be laser welding, ultrasonic welding, etc. The connection portion 22 and the protective member 30 may be fixed together by continuous welding.

[0083] By adopting the above solution, the thinned connecting portion 22 can be more reliably and firmly fixed to the protective member 30 by welding, thereby ensuring and improving the protective effect of the protective member 30 on the tuning member 20, effectively preventing damage to the tuning member 20 by foreign objects or external forces, and effectively reducing the risk of the tuning member 20 falling off the protective member 30.

[0084] See also Figure 1 、 Figure 2 In this embodiment, the cavity 10 has a resonant cavity 11 , and the tuning element 20 covers the resonant cavity 11 .

[0085] By adopting the above solution, the tuning element 20 itself can cover the cavity opening of the resonant cavity 11 of the cavity body 10, achieving a shielding function and preventing signal leakage, while the protective element 30 can reliably fasten and protect the connection portion 22, further ensuring and improving the sealing between the connection portion 22 and the cavity 10, further limiting signal leakage, and effectively preventing damage to the tuning element by foreign objects or external forces. Therefore, based on the configuration of this embodiment, a better signal shielding effect can be achieved, which can make the performance indicators of the filter more stable.

[0086] Among them, since the tuning member 20 can cover the cavity 10, the tuning member 20 is a metal member, and the protective member 30 is not limited to a metal member or a non-metal member. When the protective member 30 is a non-metal member, such as plastic or wood, the material cost can be greatly reduced.

[0087] See also Figure 1 、 Figure 2 In this embodiment, a waterproof structure (not shown in the figure) is provided at the connection between the cavity 10 and the protective member 30.

[0088] By adopting the above-mentioned scheme, waterproof treatment can be performed on the connection between the cavity 10 and the protective member 30 to form a waterproof structure, thereby optimizing the sealing and waterproof properties of the connection between the protective member 30 and the cavity 10, thereby effectively preventing external liquid from penetrating into the cavity 10 along the connection between the protective member 30 and the cavity 10 to cause a short circuit and lead to filter failure, thereby ensuring and improving the performance of the filter and ensuring and extending the service life of the filter.

[0089] See also Figure 1 、 Figure 2 In this embodiment, the tuning portion 21 is provided with an adjustment structure 40, which can be subjected to an axial z displacement to drive the tuning portion 21 to deform. This embodiment does not limit the shape and size of the adjustment structure 40.

[0090] By adopting the above-mentioned scheme, during the tuning process, the adjustment structure 40 provided on the tuning part 21 can be used to facilitate the operator to hold or apply force to the adjustment structure 40 with the help of external tools, thereby driving the adjustment structure 40 to undergo axial z displacement, so as to drive the tuning part 21 to bend and deform through the adjustment structure 40, thereby effectively ensuring and improving the tuning convenience of the filter.

[0091] Of course, in other possible embodiments, the adjustment structure 40 may not be provided. In this case, a pushing force can be directly applied to the tuning portion 21 to conveniently cause the tuning portion 21 to bend and deform toward the side closer to the cavity 10. Conversely, a pulling force can be conveniently applied to the tuning portion 21 using an external tool such as tape or a suction cup to conveniently cause the tuning portion 21 to bend and deform toward the side away from the cavity 10.

[0092] See also Figure 1 、 Figure 2 In this embodiment, the adjustment structure 40 does not protrude from the protective member 30 in the axial direction z.

[0093] By adopting the above solution, the adjustment structure 40 and the opening 31 can share the same height space, which effectively compresses the height space required for the adjustment structure 40, the tuning component 20 and the protective component 30, thereby effectively expanding the designable height of the cavity 10, and enabling the filter to achieve higher performance indicators.

[0094] See also Figure 1 、 Figure 2 In this embodiment, the adjustment structure 40 is independently formed on the tuning part 21 , and one end of the adjustment structure 40 is connected to the tuning part 21 .

[0095] By adopting the above-mentioned scheme, the adjustment structure 40 can be independently formed in advance, and then the adjustment structure 40 can be installed on the side of the tuning part 21 away from the cavity 10. Based on this, during the tuning process, the operator can hold the adjustment structure 40 or use an external tool to apply a push force to the adjustment structure 40, and conveniently drive the tuning part 21 to bend and deform toward the side close to the cavity 10. Conversely, the operator can hold the adjustment structure 40 or use an external tool to apply a pulling force to the adjustment structure 40, and conveniently drive it to bend and deform toward the side away from the cavity 10, thereby ensuring and improving the tuning convenience of the filter.

[0096] See also Figure 1 、 Figure 2 In this embodiment, there are multiple adjustment structures 40 , and the multiple adjustment structures 40 are staggered (ie, non-overlapping), and one of the adjustment structures 40 is located at the center of the tuning portion 21 .

[0097] By adopting the above scheme, during the tuning process, the adjustment structure 40 located at the center of the tuning part 21 can be driven to undergo axial z displacement, thereby causing the tuning part 21 to produce a larger deformation, thereby achieving a larger range of frequency signal adjustment; conversely, the adjustment structure 40 located away from the center of the tuning part 21 can be driven to undergo axial z displacement, thereby causing the tuning part 21 to produce a smaller deformation, thereby achieving a smaller range of frequency signal adjustment; based on this, the adjustment efficiency and adjustment accuracy of the frequency signal of the filter can be guaranteed and improved.

[0098] It should be noted that in other possible implementations, there are multiple adjustment structures 40, and the multiple adjustment structures 40 are staggered (i.e., not overlapping), and the adjustment structure 40 may not be set at the center of the tuning part 21. This embodiment does not impose any restrictions on this. During the tuning process, it is not limited to first driving a certain adjustment structure 40 to undergo axial z displacement, and multiple adjustment structures 40 may also be driven to undergo axial z displacement at the same time. This embodiment does not impose any restrictions on this.

[0099] See also Figure 1 、 Figure 2 The present application also provides a communication device including a filter. By employing the filter, the communication device can have complex multi-channel functionality, be miniaturized and lightweight, and achieve higher performance. The communication device can be a simplexer, duplexer, multiplexer, combiner, antenna, base station, or other communication device.

[0100] See also Figure 1 、 Figure 2 、 Figure 3 , an embodiment of the present application also provides a method for manufacturing a filter, which is suitable for manufacturing a filter. The method for manufacturing a filter includes a component configuration step and a component assembly step.

[0101] In the component configuration step, the cavity 10, the tuning member 20 and the protective member 30 are configured, and the protective member 30 is provided with an opening 31 that passes through the protective member 30; in the component assembly step, the tuning member 20 and the protective member 30 are connected to the cavity 10, so that the tuning part 21 is exposed to the opening 31, and the tuning member 20 is located between the protective member 30 and the cavity 10, so that the tuning member 20 and the protective member 30 jointly cover the cavity 10.

[0102] By adopting the above scheme, a miniaturized, lightweight filter with high performance indicators can be prepared, and the processing procedures of the various components of the filter and the assembly procedures between the various components of the filter can be effectively simplified, thereby effectively reducing the material cost and processing cost of the filter and effectively improving the production efficiency of the filter.

[0103] See also Figure 1 、 Figure 2 、 Figure 3 In this embodiment, in the step of assembling components, the connecting portion 22 is first fixedly connected to the protective member 30, and then the connecting portion 22 or the protective member 30 is connected to the cavity 10; wherein, in the process of fixing the connecting portion 22 to the protective member 30, the connecting portion 22 is fixedly connected to the protective member 30 by continuous laser welding, and the path of the continuous laser welding is a closed-loop structure.

[0104] By adopting the above solution, the thinned connecting portion 22 can be reliably and firmly fixed to the protective part 30 by continuous laser welding, and then the connecting portion 22 or the protective part 30 can be connected to the cavity 10 to ensure that the assembled filter can achieve better signal shielding effect and realize higher and more stable performance indicators.

[0105] Among them, based on the setting of continuous laser welding and the closed-loop structure of the continuous laser welding path, the connection reliability between the thinned connecting part 22 and the protective part 30 can be effectively guaranteed and improved, thereby effectively guaranteeing and improving the protective effect of the protective part 30 on the tuning part 20, effectively preventing damage to the tuning part 20 by foreign objects or external forces, and effectively reducing the risk of the tuning part 20 falling off the protective part 30.

[0106] Example 2

[0107] The difference between this embodiment and the first embodiment is that:

[0108] See also Figure 4The embodiment of the present application provides a filter, including a cavity 10, a resonant rod 50, a tuning member 20, and a protective member 30. The resonant rod 50 is arranged inside the cavity 10; the tuning member 20 is arranged on a side close to the open end of the cavity 10, and the tuning member 20 includes a tuning portion 21 and a connecting portion 22 arranged on the periphery of the tuning portion 21. The tuning portion 21 is arranged corresponding to the resonant rod 50, and the tuning portion 21 can be deformed under force to change the distance between the resonant rod 50 and the cavity 10; the protective member 30 is arranged on a side of the connecting portion 22 away from the cavity 10, and the connecting portion 22 is connected to the cavity 10 and / or the protective member 30. The protective member 30 and the tuning member 20 jointly cover the cavity 10. The protective member 30 is provided with an opening 31 that passes through in the axial direction z, and the tuning portion 21 is exposed in the opening 31.

[0109] It should be noted that the cavity 10 has at least one resonant cavity 11, in which a resonant rod 50 is provided. The resonant rod 50 is connected to the side of the tuning part 21 close to the cavity 10. The resonant rod 50 can be connected to the tuning part 21 by screw fastening, threaded connection, welding, integral connection, riveting, crimping, clamping, etc., which is not limited in this embodiment.

[0110] The resonant rod 50 may be a metal resonant rod 50 , a ceramic dielectric resonant rod 50 , or a dielectric resonant rod 50 made of other materials, which is not limited in this embodiment.

[0111] Among them, the resonant rod 50 can be a hollow resonant rod 50, that is, the resonant rod 50 has a resonant hole in the form of a blind hole or a through hole (not shown in the figure); or, the resonant rod 50 can be a solid resonant rod 50, that is, the resonant rod 50 does not have a resonant hole; this embodiment does not impose any restrictions on this.

[0112] The resonant rod 50 may be provided with a resonant disk 51 or without the resonant disk 51 , and the resonant disk 51 may be provided with a flange or without a flange, which is not limited in this embodiment.

[0113] The resonant rod 50 may be a circular rod, a polygonal rod, a special-shaped rod or even other shapes, which is not limited in this embodiment.

[0114] It should also be noted that the tuning component 20 is a metal component, specifically made of a deformable, non-auto-rebound metal material, such as aluminum foil, silver foil, or metal alloy.

[0115] The connection portion 22 of the tuning element 20 can be connected to the cavity 10, or the connection portion 22 can be connected to the protective member 30, or the connection portion 22 can be connected to the protective member 30 and the cavity 10. The tuning element 20 and the protective member 30 together cover the cavity opening of the resonant cavity 11 of the cavity 10 to achieve a shielding function, thereby forming an effective filter cavity and preventing signal leakage. The tuning element 20 can have a symmetrical structure or an asymmetrical structure.

[0116] There is at least one tuning component 20 provided. When there are multiple tuning components 20 , the multiple tuning components 20 are stacked in sequence along the axial direction z.

[0117] The tuning portion 21 is exposed in the opening 31 . When the tuning portion 21 bends and deforms toward the side away from the cavity 10 , the opening 31 can reserve deformation space for the tuning portion 21 .

[0118] Specifically, in the filter provided in the embodiment of the present application, during the tuning process, a thrust force can be applied to the tuning part 21 through the opening 31, so that the tuning part 21 is bent and deformed toward the side close to the cavity 10, so as to shorten the distance between the resonance rod 50 and the corresponding side of the cavity 10; or, a pulling force can be applied to the tuning part 21 through the opening 31, so that the tuning part 21 is bent and deformed toward the side away from the cavity 10, so as to increase the distance between the resonance rod 50 and the corresponding side of the cavity 10; based on this, by adjusting the distance between the tuning part 21 and the cavity 10, that is, adjusting the distance between the resonance rod 50 and the corresponding side of the cavity 10, the capacitance between the resonance rod 50 and the cavity 10 can be adjusted, thereby achieving the adjustment of the frequency signal, and the adjustment is very convenient.

[0119] Therefore, compared with the existing filter, the filter provided in the embodiment of the present application significantly eliminates the tuning screw structure of the existing filter, and on the basis of ensuring the common signal shielding effect of the tuning component 20 and the protective component 30, the tuning component 20 can be thinned to a large extent, and the protective component 30 can also be thinned to a large extent, thereby effectively compressing the height space required to be occupied by components other than the cavity 10, and then effectively expanding the designable height of the cavity 10, so that the filter can achieve higher performance indicators.

[0120] Furthermore, the filter provided by the embodiment of the present application is significantly miniaturized and lightweight, thereby being able to meet the design requirements of complex multi-channels within a limited space, that is, being suitable for forming complex multi-channel products.

[0121] Furthermore, the filter provided in the embodiment of the present application significantly reduces the number of parts and at least simplifies the tapping process, thereby effectively reducing material costs and processing costs.

[0122] Moreover, the filter provided in the embodiment of the present application will not generate burrs, debris or other impurities falling into the cavity 10 during the tuning process, and the tuning component 20 and the protective component 30 that cover the cavity 10 together can also basically restrict external impurities from entering the cavity 10 in all directions, thereby effectively ensuring and improving the intermodulation and power performance of the filter, effectively reducing the risk of filter failure due to short circuit, and thus ensuring and improving the performance of the filter, and ensuring and extending the service life of the filter.

[0123] Example 3

[0124] Please refer to Figure 2 、 Figure 5 In this embodiment, the connecting portion 22 is fixedly connected to the protective member 30 , and the connecting portion 22 or the protective member 30 is detachably connected to the cavity 10 .

[0125] It should be noted that the connection portion 22 of the tuning element 20 can be first fixedly connected to the protective element 30 using, but not limited to, welding, bonding, fusion, riveting, or an integral connection. Subsequently, the connection portion 22 or the protective element 30 can be removably connected to the cavity 10 using screws or snaps. This facilitates disassembly, replacement, and debugging of the tuning element 20 and protective element 30 relative to the cavity 10 while ensuring signal shielding.

[0126] Example 4

[0127] See also Figure 5 In this embodiment, the cavity 10 has a resonant cavity 11, the connecting portion 22 is connected to the protective member 30, the tuning member 20 does not completely cover the resonant cavity 11, the protective member 30 covers the resonant cavity 11, and the protective member 30 is a metal member.

[0128] By adopting the above solution, if the tuning element 20 cannot completely cover the resonant cavity 11, the protective member 30 can cooperate with the tuning element 20 to cover the resonant cavity 11 of the cavity body 10. In this case, the metal protective member 30 and the tuning element 20 can jointly perform a shielding function to prevent signal leakage. Therefore, based on the configuration of this embodiment, a good signal shielding effect can be achieved, the performance indicators of the filter can be more stable, and the material cost of the tuning element 20 can be reduced accordingly.

[0129] The connecting portion 22 of the tuning element 20 may be fixedly connected to the protective member 30 by, but not limited to, welding, bonding, fusion, riveting, or integral connection, or may be detachably connected to the protective member 30 by, for example, screws. When the connecting portion 22 of the tuning element 20 is integrally connected to the protective member 30, the protective member 30 is made of the same metal material as the tuning element 20. When the connecting portion 22 of the tuning element 20 is connected to the protective member 30 by a method other than integral connection, the protective member 30 may be made of the same or different metal material as the tuning element 20.

[0130] Example 5

[0131] See also Figure 6 In this embodiment, the connecting portion 22 includes a first ring portion 221 arranged on the outer periphery of the tuning portion 21, and a second ring portion 222 arranged on the outer periphery of the first ring portion 221. The second ring portion 222 is arranged between the protective member 30 and the cavity 10. The first ring portion 221 can be deformed along with the tuning portion 21 when the tuning portion 21 is deformed by force.

[0132] By adopting the above solution, the connecting portion 22 of the tuning element 20 can be fixedly connected between the protective element 30 and the cavity 10 via the outer second ring portion 222, thereby ensuring the connection reliability and firmness of the tuning element 20 and thus ensuring the effectiveness of the tuning element 20. The connecting portion 22 of the tuning element 20 also disconnects the inner first ring portion 221 from the protective element 30 and the cavity 10, allowing the first ring portion 221 to have deformation freedom. When the tuning element 21 is deformed by force, the first ring portion 221 can adaptively deform along with the tuning element 21. Based on this, the deformation amplitude of the tuning element 20 can be relatively increased, that is, the deformation amount of the tuning element 20 can be relatively increased, thereby effectively expanding the frequency signal adjustment range of the filter and effectively improving the performance of the filter.

[0133] See also Figure 6 In this embodiment, a ring groove 12 is formed on a side of the cavity 10 close to the tuning element 20 , and the ring groove 12 is arranged corresponding to the first ring portion 221 , so that the side of the first ring portion 221 facing away from the protective element 30 is an air avoidance area.

[0134] By adopting the above scheme, deformation space for the tuning part 21 and the first ring part 221 to bend and deform toward the side close to the cavity 10 can be reserved through the annular groove 12, especially reducing the degree of constraint on the bending and deformation of the first ring part 221 toward the side close to the cavity 10, and relatively enlarging the deformation amplitude of the tuning component 20, that is, relatively enlarging the deformable amount of the tuning component 20, thereby achieving an enlarged adjustment range of the frequency signal of the filter.

[0135] See also Figure 6 In this embodiment, at least a portion of the first ring portion 221 and the tuning portion 21 are exposed in the opening 31 .

[0136] By adopting the above-mentioned scheme, the aperture of the opening 31 can be enlarged to reserve deformation space for the tuning portion 21 and the first ring portion 221 to bend and deform toward the side away from the cavity 10, especially reducing the degree of constraint on the bending deformation of the first ring portion 221 toward the side away from the cavity 10, thereby relatively enlarging the deformation amplitude of the tuning component 20, that is, relatively enlarging the deformable amount of the tuning component 20, thereby achieving an enlarged adjustment range of the frequency signal of the filter.

[0137] Example 6

[0138] See also Figure 7 In this embodiment, the tuning part 21 includes a tuning platform 211 and a tuning ring 212 connected between the tuning platform 211 and the connecting part 22. The tuning ring 212 is loosely matched with the inner wall of the opening 31, and the tuning platform 211 is integrally sealed on the end of the tuning ring 212 away from the cavity 10.

[0139] By adopting the above scheme, the tuning portion 21 can utilize the existing space of the opening 31, extend in the direction away from the cavity 10 to form a tuning ring 212, and close the tuning ring 212 on the side away from the cavity 10 to form a tuning platform 211, thereby achieving a relatively increased initial distance of the tuning platform 211 relative to the cavity 10. Based on this, the deformation amplitude of the tuning portion 21 bending toward the side close to the cavity 10 can be relatively enlarged, and the deformable amount of the tuning portion 21 can be relatively enlarged, thereby achieving an expanded adjustment range of the frequency signal of the filter.

[0140] Among them, since the initial position of the tuning stage 211 is relatively high, during the actual tuning process, the possibility of adjusting the tuning portion 21 to bend and deform toward the side close to the cavity 10 is higher, thereby expanding the adjustment range of the frequency signal of the filter.

[0141] In other possible implementations, a convex or concave adjustment structure 40 may also be provided on the tuning portion 21 , and this embodiment does not limit this.

[0142] Example 7

[0143] Please refer to Figure 8 In this embodiment, the cavity 10 is provided with a mounting groove 13 for limiting the installation of the protective member 30 ; the mounting groove 13 is recessed in the corresponding side surface close to the opening direction of the cavity 10 .

[0144] By adopting the above solution, the protective member 30 can be installed in a limited position through the mounting groove 13, thereby accurately positioning and stabilizing the position and state of the protective member 30 and the tuning member 20 relative to the cavity 10, thereby ensuring and improving the connection reliability and sealing between the protective member 30 and the tuning member 20 and the cavity 10, thereby ensuring and improving the shielding performance of the protective member 30 and the tuning member 20. In addition, by installing the protective member 30 in the recessed mounting groove 13, the protective member 30 and the tuning member 20 can share at least a portion of the height space with the cavity 10, thereby facilitating the expansion of the designable height of the cavity 10 and enabling the filter to achieve higher performance indicators.

[0145] Example 8

[0146] The difference between this embodiment and the seventh embodiment is that:

[0147] See also Figure 8 In this embodiment, the cavity 10 is provided with an installation groove 13 for limiting the installation of the protective member 30; a limiting ring 14 is convexly provided on the corresponding side surface close to the opening direction of the cavity 10, and the limiting ring 14 encloses the installation groove 13.

[0148] The limiting ring 14 may be an integral structure formed integrally with the cavity 10 , or may be separately connected to the cavity 10 by welding, threaded connection, clamping, or the like.

[0149] By adopting the above-mentioned scheme, the installation groove 13 can be formed by enclosing the limiting ring 14 to limit the installation of the protective part 30. Based on this, the position and state of the protective part 30 and the tuning part 20 relative to the cavity 10 can be relatively accurately positioned and stabilized, thereby ensuring and improving the connection reliability and connection sealing between the protective part 30 and the tuning part 20 and the cavity 10, and further ensuring and improving the shielding performance of the protective part 30 and the tuning part 20.

[0150] Embodiment 9

[0151] Please refer to Figure 2 In this embodiment, the opening 31 is a threaded hole.

[0152] Based on the setting of this embodiment, when the tuning component 20 is damaged, the metal cover plate equipped with the tuning screw can be threadedly connected to the opening 31, and the tuning screw can be extended into the cavity 10 through the damaged part of the tuning component 20, thereby ensuring the performance of the filter and extending the service life of the filter.

[0153] At this time, the tuning method of the filter will be changed to: by rotating the tuning screw relative to the metal cover, the length of the tuning screw penetrating into the cavity 10 is adjusted, that is, the distance between the tuning screw and the resonance rod 50 is adjusted, thereby adjusting the frequency signal.

[0154] Example 10

[0155] See also Figure 9 In this embodiment, the adjustment structure 40 is integrally formed with the tuning portion 21 , and the adjustment structure 40 is recessed in the tuning portion 21 .

[0156] Specifically, during the tuning process, the operator can insert a finger or an external tool into the adjustment structure 40 and apply a pushing force to the adjustment structure 40, thereby conveniently causing the tuning portion 21 to bend and deform toward the side close to the cavity 10. Conversely, the operator can insert an external tool such as a suction cup into the adjustment structure 40 and apply a pulling force to the adjustment structure 40, thereby conveniently causing the tuning portion 21 to bend and deform toward the side away from the cavity 10. This ensures and improves the convenience of filter tuning.

[0157] By adopting the above solution, the adjustment structure 40 can be directly recessed on the tuning part 21. Based on this, the number of parts can be relatively reduced, and the assembly process between the adjustment structure 40 and the tuning part 21 can be simplified, thereby effectively reducing material costs and processing costs.

[0158] Example 11

[0159] The difference between this embodiment and the tenth embodiment is that:

[0160] See also Figure 10In this embodiment, the adjustment structure 40 is integrally formed with the tuning portion 21 , and the adjustment structure 40 is protruded from the tuning portion 21 .

[0161] Specifically, during the tuning process, the operator can hold the adjustment structure 40 or use an external tool to apply a pushing force to the adjustment structure 40, thereby conveniently driving the tuning portion 21 to bend and deform toward the side close to the cavity 10. Conversely, the operator can hold the adjustment structure 40 or use an external tool to apply a pulling force to the adjustment structure 40, thereby conveniently driving the tuning portion 21 to bend and deform toward the side away from the cavity 10. This ensures and improves the convenience of tuning the filter.

[0162] By adopting the above solution, the adjustment structure 40 can be directly protruded on the tuning part 21. Based on this, the number of parts can be relatively reduced, and the assembly process between the adjustment structure 40 and the tuning part 21 can be simplified, thereby effectively reducing material costs and processing costs.

[0163] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A filter, characterized in that: include: cavity; A resonant rod is disposed inside the cavity; a tuning member disposed on a side close to the open end of the cavity, the tuning member comprising a tuning portion and a connecting portion disposed on the periphery of the tuning portion, the tuning portion being disposed corresponding to the resonant rod, the tuning portion being deformable under force to change the distance of the resonant rod relative to the tuning member, or the tuning portion being deformable under force to change the distance of the resonant rod relative to the cavity; A protective member is arranged on a side of the connecting portion facing away from the cavity, the connecting portion and the protective member are fixedly connected by continuous laser welding, the path of the continuous laser welding is a closed-loop structure, the connecting portion or the protective member is connected to the cavity, the protective member and the tuning member jointly cover the cavity, the protective member is provided with an axially through-going opening, and the tuning portion is exposed in the opening.

2. The filter according to claim 1, wherein The connecting portion is fixedly connected to the cavity; or, The connecting portion or the protecting member is detachably connected to the cavity.

3. The filter according to claim 1, wherein The cavity body has a resonant cavity, and the tuning component covers the resonant cavity.

4. The filter according to claim 1, wherein The cavity body has a resonant cavity, the protective member covers the resonant cavity, and the protective member is a metal member.

5. The filter according to claim 1, wherein The connecting portion includes a first ring portion arranged on the outer periphery of the tuning portion, and a second ring portion arranged on the outer periphery of the first ring portion. The second ring portion is arranged between the protective member and the cavity. The first ring portion can deform along with the tuning portion when the tuning portion is deformed by force.

6. The filter according to claim 5, wherein A ring groove is formed on a side of the cavity close to the tuning element. The ring groove is arranged corresponding to the first ring portion, so that a side of the first ring portion facing away from the protective element serves as an air avoidance zone.

7. The filter according to claim 5, wherein At least a portion of the first ring portion and the tuning portion are exposed in the opening.

8. The filter according to claim 1, wherein The tuning part includes a tuning platform and a tuning ring connected between the tuning platform and the connecting part. The tuning ring is loosely matched with the inner wall of the opening. The tuning platform is integrally sealed on one end of the tuning ring away from the cavity.

9. The filter according to claim 1, wherein The cavity is provided with an installation groove for limiting the installation of the protective element; The mounting groove is recessed on the corresponding side surface close to the opening direction of the cavity; Alternatively, a limiting ring is protrudingly provided on the corresponding side surface close to the opening direction of the cavity, and the limiting ring encloses to form the installation groove.

10. The filter according to claim 1, wherein A waterproof structure is provided at the connection between the cavity and the protective element.

11. The filter according to claim 1, wherein The opening is a threaded hole.

12. The filter according to any one of claims 1 to 11, characterized in that The tuning part is provided with an adjustment structure, and the adjustment structure can be subjected to force to cause axial displacement to drive the tuning part to deform, and the adjustment structure does not protrude from the protective member in the axial direction.

13. The filter according to claim 12, wherein The adjustment structure is integrally formed on the tuning part, the adjustment structure is recessed on the tuning part, or the adjustment structure is convexly disposed on the tuning part; Alternatively, the adjustment structure is independently formed on the tuning part, and one end of the adjustment structure is connected to the tuning part.

14. The filter according to claim 12, wherein There are multiple adjustment structures, and the multiple adjustment structures are staggered, and one of the adjustment structures is located at the center of the tuning part.

15. A communication device, characterized in that: Comprising the filter according to any one of claims 1-14.

16. A method for manufacturing a filter, characterized in that: Suitable for manufacturing a filter according to any one of claims 1 to 14, comprising: A configuration component is configured to configure the cavity, the tuning component, and the protective component, wherein the protective component is provided with the opening penetrating the protective component; Assemble components, connect the tuning component and the protective component to the cavity, expose the tuning part to the opening, and locate the tuning component between the protective component and the cavity, so that the tuning component and the protective component jointly cover the cavity; in the step of assembling components, first fix the connecting part to the protective component, and then connect the connecting part or the protective component to the cavity; wherein, in the process of fixing the connecting part to the protective component, the connecting part is fixedly connected to the protective component by continuous laser welding, and the path of the continuous laser welding is a closed-loop structure.

Images