Filter

Abstract

The utility model relates to the field of communication, and provides a filter. The filter includes a first component and a second component. The first part is of an integrally-formed structure and comprises a first shell, and the first shell comprises a first plate. The second part is of an integrally-formed structure and comprises a second shell and a resonance rod, the second shell covers the first shell, the second shell comprises a second plate arranged opposite to the first plate, the resonance rod is arranged in a space defined by the second shell and the first shell, and the resonance rod is integrally connected to the second plate and spaced from the first plate. And the cross section size of the resonance rod is gradually reduced or is not changed in the direction far away from the second plate. Therefore, the filter can be quickly assembled and formed through the covering assembly of the first part and the second part, so that the number of parts and assembly materials of the filter can be reduced, the structure and the assembly process can be simplified, the assembly convenience and the assembly efficiency can be improved, and the miniaturization, simplicity and batch production of the filter can be facilitated.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of communication, and particularly relates to a filter. BACKGROUND

[0002] In some cases, the filter comprises a filter shell and a plurality of resonant rods arranged in the filter shell, each resonant rod is connected to and fixed to a wall of the filter shell, and the required coupling relationship is established between the resonant rods. However, the filter has a large number of assembly materials, and the assembly process is complicated, which is not conducive to mass production. CONTENT OF THE UTILITY MODEL

[0003] The embodiment of the application provides a filter, and aims to solve the problems of the existing filter, such as a large number of assembly materials, a complicated assembly process and being not conducive to mass production.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the embodiment of the application is as follows:

[0005] In a first aspect, a filter is provided, comprising:

[0006] A first component is an integral structure, the first component comprises a first shell, and the first shell comprises a first plate;

[0007] A second component is an integral structure, the second component comprises a second shell and at least one resonant rod, the second shell is combined with the first shell, the second shell comprises a second plate arranged opposite to the first plate, the resonant rod is arranged in a space enclosed by the second shell and the first shell, the resonant rod is integrally connected to the second plate and spaced from the first plate, and the cross-sectional dimension of the resonant rod is gradually reduced in the direction away from the second plate or remains unchanged.

[0008] In some embodiments, the first component comprises a resonant matching structure, the resonant matching structure is integrally connected to one side of the first plate facing the second plate, the outer periphery of at least one resonant rod is provided with the resonant matching structure, and the resonant matching structure is arranged spaced from the outer peripheral wall of the corresponding resonant rod.

[0009] In some embodiments, the resonant matching structure is arranged one-to-one corresponding to the resonant rod.

[0010] In some embodiments, the resonant matching structure is an annular structure, the annular structure is sleeved on the outer periphery of the corresponding resonant rod, and the inner annular wall of the annular structure is arranged spaced from the outer peripheral wall of the corresponding resonant rod.

[0011] In some embodiments, the resonant rod is provided with a plurality of;

[0012] The second housing includes a coupling rib, which is integrally connected to the second plate and located between the two resonant rods.

[0013] In some embodiments, the resonant rods are provided in multiple forms;

[0014] The first housing includes an isolation wall, one end of which is integrally connected to the first plate along the axial direction of the resonant rod, and the other end of which abuts against the second plate along the axial direction of the resonant rod; or, the second housing includes an isolation wall, one end of which is integrally connected to the second plate along the axial direction of the resonant rod, and the other end of which abuts against the first plate along the axial direction of the resonant rod.

[0015] In some embodiments, the resonant rods are provided in multiple forms;

[0016] The first component and / or the second component includes a capacitive coupling structure disposed between the two resonant rods for capacitively coupling the two resonant rods.

[0017] In some embodiments, the first component includes a first coupling member integrally connected to the first plate, and the second component includes a second coupling member integrally connected to the second plate. The first coupling member and the second coupling member extend toward each other and abut against each other to jointly form the capacitive coupling structure.

[0018] In some embodiments, the first coupling member and the second coupling member are welded together.

[0019] In some embodiments, one of the first coupling member and the second coupling member is provided with a stop, and the other of the first coupling member and the second coupling member is positioned to abut against the stop.

[0020] In some embodiments, the capacitive coupling structure capacitively couples a first resonator and a second resonator, wherein the first resonator is located on the side of the first coupling member opposite to the second coupling member, and the second resonator is located on the side of the second coupling member opposite to the first coupling member, wherein the first coupling member is closer to the first resonator relative to the second coupling member, and the second coupling member is closer to the second resonator relative to the first coupling member.

[0021] In some embodiments, the first coupling member is arranged near the first resonator and away from the second resonator, and the second coupling member is arranged near the second resonator and away from the first resonator.

[0022] In some embodiments, the second coupling member is integrally connected to the outer peripheral wall of the second resonator and spaced apart from the first resonator; and / or, the outer periphery of the first resonator is provided with a first resonant engagement structure, the first coupling member is integrally connected to the first resonant engagement structure and spaced apart from the second resonator.

[0023] In some embodiments, the outer surface of the first housing and / or the second housing is provided with a cavity, the cavity not communicating with the enclosing space between the second housing and the first housing.

[0024] In some embodiments, at least one of the resonant rods has the cavity inside.

[0025] In some embodiments, at least one of the resonant rods has the cavity inside, and a deformable portion that can be deformed under force is formed near the end wall of the first plate.

[0026] In some embodiments, the first plate has at least one tuning section that is deformable under force, the tuning section being used to adjust the resonant frequency of the resonant rod disposed therewith.

[0027] In some embodiments, the filter includes at least one tuning element for adjusting the resonant frequency of the resonant rod corresponding to it;

[0028] The tuning element is threadedly connected to the first plate; or, the tuning element passes through the first plate and is threadedly connected to a nut.

[0029] In some embodiments, the tuning element is a tuning screw;

[0030] Alternatively, the tuning element may include a screw portion and a disk portion connected to one end of the screw portion near the resonant rod.

[0031] In some embodiments, the first housing includes a housing body, one side of which is integrally connected to the first plate, and the other side of which abuts against and is welded to the second plate.

[0032] The beneficial effects of the filter provided in this application are as follows:

[0033] The filter provided in this application embodiment can be assembled quickly, simply, and conveniently by directly fitting together an integrally formed first component and an integrally formed second component. Furthermore, the assembled filter can achieve shielding and prevent signal leakage through the mutual fitting of the first and second housings, and can also filter and select frequencies through resonant rods, resulting in superior filtering performance. Based on this, the number of filter components can be significantly reduced, effectively simplifying the filter structure and facilitating miniaturization, simplification, and weight reduction, thereby improving the filter's integration, consistency, and reliability. It also significantly reduces the assembly materials required for the filter, effectively simplifying the assembly process, especially eliminating the individual assembly process for each resonant rod, thus improving the ease and efficiency of filter assembly and facilitating mass production. Furthermore, this embodiment also facilitates demolding of the second component during the integral molding process by gradually reducing or keeping the cross-sectional dimensions of the resonant rod away from the second plate. This improves the demolding convenience and efficiency of the second component, thereby enhancing its processing convenience, efficiency, and accuracy. Ultimately, this improves the production convenience and efficiency of the filter, facilitating mass production. In addition, it helps reduce the material and production costs of the filter. Attached Figure Description

[0034] To clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 A three-dimensional schematic diagram of a filter provided in some embodiments of this application, wherein the filter is provided with a tuning element;

[0036] Figure 2 for Figure 1 A cross-sectional view of the provided filter;

[0037] Figure 3 A perspective view of a filter provided in some other embodiments of this application, wherein the filter is provided with multiple tuning elements;

[0038] Figure 4 for Figure 3 A top view of the provided filter;

[0039] Figure 5 for Figure 4 The provided sectional view along AA;

[0040] Figure 6 forFigure 3 A bottom view of the first component is provided;

[0041] Figure 7 for Figure 3 The provided structural schematic diagram of the second component and the signal transmission end;

[0042] Figure 8 for Figure 7 A top view of the provided second component and signal transmission end;

[0043] Figure 9 for Figure 3 A schematic diagram of the filter topology is provided.

[0044] Figure 10 A cross-sectional view of a filter provided in some other embodiments of this application, wherein both the outer surface of the first housing and the outer surface of the second housing are provided with cavities;

[0045] Figure 11 A perspective view of a filter provided in some other embodiments of this application, wherein the filter is provided with multiple tuning sections;

[0046] Figure 12 for Figure 11 Provided sectional view along BB;

[0047] Figure 13 A perspective view of a filter provided for other embodiments of this application, wherein a tuning element is threadedly connected to a nut;

[0048] Figure 14 for Figure 13 A cross-sectional view of the provided filter;

[0049] Figure 15 A schematic flowchart illustrating a method for manufacturing a filter according to some embodiments of this application;

[0050] Figure 16 for Figure 3 The provided simulation waveform diagram of the filter.

[0051] The following are the labeling elements in the figure:

[0052] 10-First component, 11-First housing, 111-First plate, 1111-Tuning part, 1112-Threaded hole, 112-Isolation wall, 1121-Coupling window, 1121a-First coupling window, 1121b-Second coupling window, 1121c-Third coupling window, 1121d-Fourth coupling window, 113-Shell body, 12-Resonant mating structure, 12a-First resonant mating structure, 13-First coupling element; 20-Second component, 21-Second housing, 211-Second plate, 212-Cavity, 213-Coupling rib, 22-Resonant rod 22a-First resonant rod, 22b-Second resonant rod, 22c-Third resonant rod, 22d-Fourth resonant rod, 22e-Fifth resonant rod, 22f-Sixth resonant rod, 22g-Seventh resonant rod, 22h-Eighth resonant rod, 22i-Ninth resonant rod, 22j-Tenth resonant rod, 22x-First resonator, 22y-Second resonator, 221-Deformation part, 23-Second coupling element, 231-Stop; 30-Capacitive coupling structure, 40-Tuning element, 41-Screw part, 42-Disc part; 50-Nut, 60-Coupling adjustment structure, 70-Signal transmission end. Detailed Implementation

[0053] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clear, the application will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application. Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions.

[0054] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0055] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0056] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] In some cases, a filter includes a filter housing and multiple resonant rods disposed within the filter housing. Each resonant rod is connected and fixed to the wall of the filter housing, and the required coupling relationship is established between the resonant rods. However, this type of filter has a large number of assembly materials, and the assembly process is cumbersome and complex, which is not conducive to mass production.

[0058] The embodiments provided in this application will solve the above problems.

[0059] To illustrate the technical solutions provided in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0060] Please see Figure 1 , Figure 2 See also Figure 3 , Figure 4 , Figure 5 Some embodiments of this application provide a filter, including a first component 10 and a second component 20. The first component 10 is a one-piece structure, including a first housing 11, which includes a first plate 111. The second component 20 is a one-piece structure, including a second housing 21 and at least one resonant rod 22. The second housing 21 covers the first housing 11 and includes a second plate 211 disposed opposite to the first plate 111. The resonant rod 22 is disposed within the enclosed space of the second housing 21 and the first housing 11, and is integrally connected to the second plate 211 and spaced apart from the first plate 111. The cross-sectional dimensions of the resonant rod 22 are either gradually reduced or remain unchanged in the direction away from the second plate 211.

[0061] It should be noted that the first component 10 is an integrally molded component, that is, the first component 10 is an integrally molded structure or an integrated structure. The integral molding method adopted by the first component 10 is not limited for the time being. All parts of the first component 10 are made of the same material. The first component 10 as a whole is a metal part, or the surface of the first component 10 is coated with a metal layer (the part of the first component 10 used to support the metal layer can be made of non-metallic materials).

[0062] Similarly, the second component 20 is also a single integral component, that is, the second component 20 is a one-piece structure or an integrated structure. The one-piece molding method used for the second component 20 is not limited for the time being. All parts of the second component 20 are made of the same material. The material of the second component 20 and the first component 10 can be the same or different. The second component 20 is made of metal as a whole, or the surface of the second component 20 is coated with a metal layer (the part of the second component 20 used to support the metal layer can be made of non-metallic materials).

[0063] It should also be noted that the first component 10 includes a first housing 11, and the second component 20 includes a second housing 21. The second housing 21 and the first housing 11 overlap to form a closed space. The second housing 21 and the first housing 11 together provide shielding to prevent signal leakage. The resonant rod 22 can be accommodated within the enclosed space of the second housing 21 and the first housing 11. The shape, size, and material of the second housing 21 and the first housing 11 can be customized as needed.

[0064] The first housing 11 includes a first plate 111, and the second housing 21 includes a second plate 211. The first plate 111 and the second plate 211 are arranged opposite to each other. In practical applications, the filter can be placed with the first plate 111 facing upwards, or with the first plate 111 facing left, right, forward, or backwards.

[0065] It should also be noted that the second component 20 includes one or more resonant rods 22. The resonant rods 22 are located within the enclosed space of the second housing 21 and the first housing 11. The resonant rods 22 are integrally connected to the side of the second plate 211 facing the first plate 111, with the end of the resonant rod 22 away from the second plate 211 spaced apart from the first plate 111 to form a parallel plate capacitor. When multiple resonant rods 22 are provided, they can be located in the same column or in different columns, and the desired coupling relationship can be established between them. Each resonant rod 22 has a resonant frequency within the filter passband, and each resonant rod 22 can perform signal filtering and frequency selection.

[0066] Since the second component 20 is a one-piece molded structure, the resonant rod 22 will be directly molded together with the second plate 211. Therefore, setting the cross-sectional dimensions of the resonant rod 22 to gradually decrease or remain unchanged in the direction away from the second plate 211 facilitates demolding, especially facilitating demolding along the axial direction of the resonant rod 22. Here, the axial direction of the resonant rod 22 is the extension direction of its central axis, and the cross-section of the resonant rod 22 is the cross-section perpendicular to its axial direction.

[0067] The resonant rod 22 can be a hollow resonant rod or a solid resonant rod; the resonant rod 22 does not have a resonant disk or a flange; the cross-sectional shape of the resonant rod 22 can be circular, square, elliptical, polygonal, irregular, etc.; the resonant rod 22 can be a circular rod, square rod, elliptical rod, polygonal rod, irregular rod, sheet resonant rod, sheet metal resonant rod or other resonant rod shapes, etc.

[0068] In summary, the filter provided in this application embodiment can be directly assembled by fitting together an integrally formed first component 10 and an integrally formed second component 20, thus enabling quick, simple, and convenient assembly of the filter product. Furthermore, the assembled filter can achieve shielding and prevent signal leakage through the mutual fitting of the first housing 11 and the second housing 21, and can also achieve signal filtering and frequency selection through the resonant rod 22, resulting in superior filtering performance. Based on this, the number of filter components can be significantly reduced, effectively simplifying the filter structure, thereby facilitating filter miniaturization, simplification, and weight reduction, and improving the filter's integration, consistency, and reliability. It can also significantly reduce the filter's assembly materials, effectively simplifying the filter assembly process, especially eliminating the individual assembly process for each resonant rod 22, thereby improving the ease and efficiency of filter assembly and facilitating mass production of the filter. Furthermore, this embodiment also facilitates demolding of the second component 20 during the integral molding process by gradually reducing or keeping the cross-sectional dimensions of the resonant rod 22 away from the second plate 211, thereby improving the demolding convenience and efficiency of the second component 20. This, in turn, improves the processing convenience, efficiency, and accuracy of the second component 20, enhancing the production convenience and efficiency of the filter and facilitating mass production. In addition, it also helps reduce the material and production costs of the filter.

[0069] Since the cross-sectional dimensions of the resonant rod 22 are either gradually reduced or remain unchanged in the direction away from the second plate 211, if the resonant rod 22 forms a parallel plate capacitor only through its end wall away from the second plate 211 and spaced from the first plate 111, the resonant rod 22 may have a small capacitance value, resulting in an excessively high resonant frequency. This would cause the resonant frequency of the resonant rod 22 to fail to meet the passband requirements of the filter. To solve this problem, please refer to [link to relevant documentation]. Figure 2 , Figure 5 , Figure 6 In some embodiments of this application, the first component 10 includes a resonant engagement structure 12, which is integrally connected to the side of the first plate 111 facing the second plate 211. The outer periphery of at least one resonant rod 22 is provided with the resonant engagement structure 12, and the resonant engagement structure 12 is spaced apart from the outer periphery wall of the corresponding resonant rod 22.

[0070] It should be noted that the first component 10 includes a resonant mating structure 12. In the integral molding process of the first component 10, the resonant mating structure 12 is directly molded together with the first plate 111, so that the resonant mating structure 12 is integrally connected to the side of the first plate 111 facing the second plate 211.

[0071] At least one resonant rod 22 has a resonant engagement structure 12 on its outer periphery. That is, each resonant rod 22 may have a resonant engagement structure 12 on its outer periphery, such that the resonant engagement structure 12 is set in a one-to-one correspondence with the resonant rod 22, and the number of resonant engagement structures 12 is equal to the number of resonant rods 22. Alternatively, some resonant rods 22 may have a resonant engagement structure 12 on their outer periphery while others may not have a resonant engagement structure 12 on their outer periphery, such that the number of resonant engagement structures 12 is less than the number of resonant rods 22.

[0072] Since the electric field is concentrated near the first plate 111 and the resonant coupling structure 12 is integrally connected to the first plate 111, and the outer peripheral walls of the resonant coupling structure 12 and the corresponding resonant rod 22 are spaced apart, a parallel plate capacitor can be formed between the resonant coupling structure 12 and the outer peripheral walls of the corresponding resonant rod 22. Based on this, the resonant rod 22, which has the resonant coupling structure 12 spaced apart on its outer periphery, can not only form a parallel plate capacitor with the first plate 111 through its end wall away from the second plate 211, but also form a parallel plate capacitor through its outer peripheral wall spaced apart from the resonant coupling structure 12.

[0073] Among them, such as Figure 6 As shown, in some embodiments, the resonant coordination structure 12 can be a ring structure, which can be a closed ring or an open ring, and can be a circular ring, a rectangular ring, or other ring shapes, etc. In other embodiments, the resonant coordination structure 12 can include one or more sheet-like structures. When multiple sheet-like structures are provided, the multiple sheet-like structures are arranged sequentially along the circumference of the corresponding resonant rod 22. The sheet-like structures can be straight plates, arc-shaped plates, or other curved plates.

[0074] The extension length of the resonant fitting structure 12 along the axial direction of the resonant rod 22 can be set as needed. Theoretically, it is permissible to "set the resonant fitting structure 12 to be longer and the resonant rod 22 to be shorter along the axial direction of the resonant rod 22", but this may make tuning somewhat difficult.

[0075] By adopting the above scheme, and by adding a resonant engagement structure 12 to the outer periphery of at least one resonant rod 22, and by spacing the resonant engagement structure 12 from the outer periphery of the corresponding resonant rod 22, the resonant rod 22 with the resonant engagement structure 12 on its outer periphery can form a parallel plate capacitor not only through the end wall of the resonant rod 22 away from the second plate 211 and spaced from the first plate 111, but also through the outer periphery of the resonant rod 22 and spaced from the resonant engagement structure 12. Based on this, the total capacitance between the resonant rod 22 and the first plate 111, and between the resonant rod 22 and the resonant engagement structure 12, can be increased, and the resonant frequency generated by the resonant rod 22 can be reduced. This allows the resonant frequency of the resonant rod 22 to meet the passband requirements of the filter, thereby improving the filter's filtering performance and frequency selectivity. Furthermore, the resonant engagement structure 12 can be easily added or removed as needed, and the capacitance value can be flexibly adjusted by adjusting the spacing and / or relative area between the resonant engagement structure 12 and the resonant rod 22, the size of the resonant engagement structure 12, etc. Since the resonant engagement structure 12 is integrally formed with the first plate 111, the processing accuracy of the resonant engagement structure 12 can be improved, reducing loosening, processing errors, and fitting errors. This facilitates precise control of the resonant frequency of the resonant rod 22, and optimizes the filter's filtering performance and frequency selectivity. Moreover, since the resonant engagement structure 12 is integrally formed with the first plate 111, no additional assembly is required. Therefore, the filter assembly process can be simplified, improving assembly convenience and efficiency, and facilitating mass production of the filter.

[0076] Please see Figure 5 , Figure 6 , Figure 7 In some embodiments of this application, the resonant mating structure 12 is provided in a one-to-one correspondence with the resonant rod 22. That is, the resonant mating structure 12 is provided on the outer periphery of the resonant rod 22 in a one-to-one manner.

[0077] By adopting the above scheme, each resonant rod 22 can be provided with a resonant engagement structure 12 on its outer periphery. This increases the capacitance value corresponding to each resonant rod 22 and reduces the resonant frequency of each resonant rod 22, ensuring that the resonant frequency of each resonant rod 22 meets the passband requirements of the filter. Furthermore, the size, spacing, or relative area of ​​the corresponding resonant engagement structure 12 can be individually designed and adjusted according to the specific needs of each resonant rod 22, thereby precisely controlling the resonant frequency of each resonant rod 22. This optimizes the filter's filtering performance and frequency selectivity characteristics. Moreover, the one-to-one correspondence between the resonant engagement structure 12 and the resonant rod 22 allows for a modular resonator design, facilitating standardized filter production and mass production and assembly.

[0078] Please see Figure 2 , Figure 5 ,Figure 6 In some embodiments of this application, the resonant mating structure 12 is a ring structure, which is sleeved on the outer periphery of the corresponding resonant rod 22, and the inner ring wall of the ring structure is spaced apart from the outer periphery wall of the corresponding resonant rod 22.

[0079] It should be noted that the resonant structure 12 is a ring structure. The ring structure can be a closed ring or an open ring, and can be circular, rectangular, or other shapes. The ring structure is fitted around the outer periphery of the corresponding resonant rod 22, and the inner ring wall of the ring structure is spaced apart from the outer periphery wall of the corresponding resonant rod 22.

[0080] By adopting the above scheme, making the resonant coupling structure 12 a ring structure, and fitting the ring structure around the outer periphery of the corresponding resonant rod 22, with the inner ring wall of the ring structure spaced apart from the outer periphery wall of the corresponding resonant rod 22, a large and uniform capacitance region can be formed between the inner ring wall of the ring structure and the outer periphery wall of the corresponding resonant rod 22. Based on this, not only can the total capacitance between the resonant rod 22 and the first plate 111, and between the resonant rod 22 and the resonant coupling structure 12 be increased, but the capacitance distribution can also be balanced and uniform. This reduces the resonant frequency generated by the resonant rod 22 and reduces the risk of frequency shift or instability caused by uneven capacitance distribution, thereby improving the filter's filtering performance and frequency selectivity characteristics.

[0081] Please see Figure 7 , Figure 8 In some embodiments of this application, the resonant rod 22 is provided in multiple ways; the second housing 21 includes a coupling rib 213, which is integrally connected to the second plate 211 and located between the two resonant rods 22.

[0082] It should be noted that this embodiment is applicable to the case where "multiple resonant rods 22 are provided".

[0083] The second housing 21 may include at least one coupling rib 213, which is located between the two resonant rods 22 that need to be coupled, so that the two resonant rods 22 can be inductively coupled through the coupling rib 213, thereby facilitating the transmission of signals from one resonant rod 22 to the other. The coupling rib 213 may be integrally connected to the resonant rod 22, or it may be spaced apart from the resonant rod 22.

[0084] Among them, such as Figure 7As shown, the coupling rib 213 abuts against and is integrally connected to the surface of the second plate 211. Based on this, there is no gap between the coupling rib 213 and the surface of the second plate 211. Since the second component 20 is an integrally formed structure, after the coupling rib 213 and the second plate 211 are directly formed together, there is no need to use machining or other methods to process the gap between the coupling rib 213 and the second plate 211. That is, in the integral forming process of the second component 20, the coupling rib 213 can be integrally formed with the second plate 211 in one go. There is no need to add an extra processing process after integral forming. This can improve the processing convenience, processing efficiency and processing accuracy of the second component 20, improve the production convenience and production efficiency of the filter, facilitate the mass production of the filter, and also help reduce the production cost of the filter.

[0085] The coupling rib 213 can be disposed between two adjacent resonant rods 22 to enable inductive coupling between the two resonant rods 22. The two adjacent resonant rods 22 are adjacent on the main signal transmission path; that is, the coupling between these two resonant rods 22 via the coupling rib 213 is a coupling relationship on the main signal transmission path. In other words, the coupling relationship between these two resonant rods 22 is cascaded.

[0086] Of course, when the number of resonant rods 22 is at least three, the coupling rib 213 can also be arranged between two non-adjacent resonant rods 22 to achieve inductive cross-coupling between the two resonant rods 22. Two non-adjacent resonant rods 22 mean that they are not adjacent on the main signal transmission path; that is, the coupling achieved by the coupling rib 213 between these two resonant rods is cross-coupling, meaning that the coupling relationship between these two resonant rods 22 is non-cascaded.

[0087] For example, such as Figure 7 , Figure 8 , Figure 9As shown, in one example of the filter, there are ten resonant rods 22, namely, the first resonant rod 22a, the second resonant rod 22b, the third resonant rod 22c, the fourth resonant rod 22d, the fifth resonant rod 22e, the sixth resonant rod 22f, the seventh resonant rod 22g, the eighth resonant rod 22h, the ninth resonant rod 22i, and the tenth resonant rod 22j. The path along which the signal is transmitted sequentially from the first resonant rod 22a, the second resonant rod 22b, the third resonant rod 22c, the fourth resonant rod 22d, the fifth resonant rod 22e, the sixth resonant rod 22f, the seventh resonant rod 22g, the eighth resonant rod 22h, the ninth resonant rod 22i, and the tenth resonant rod 22j is the main signal transmission path. Inductive coupling is achieved between the first resonant rod 22a and the second resonant rod 22b, between the second resonant rod 22b and the third resonant rod 22c, between the third resonant rod 22c and the fourth resonant rod 22d, between the fourth resonant rod 22d and the fifth resonant rod 22e, between the fifth resonant rod 22e and the sixth resonant rod 22f, between the sixth resonant rod 22f and the seventh resonant rod 22g, and between the ninth resonant rod 22i and the tenth resonant rod 22j, respectively, through coupling ribs 213. Inductive cross-coupling is achieved between the seventh resonant rod 22g and the ninth resonant rod 22i through coupling ribs 213.

[0088] By adopting the above scheme, when there are multiple resonant rods 22, any two resonant rods 22 can form inductive coupling or even enhanced coupling as needed through the coupling rib 213. This facilitates the construction of the required coupling relationship among multiple resonant rods 22, facilitates the formation of a complete and orderly signal transmission channel inside the filter, promotes energy transmission according to the preset signal transmission channel, and maintains and optimizes the filter's filtering performance and frequency selectivity characteristics. Furthermore, in the integral molding process of the second component 20, the coupling rib 213 is integrally molded with the second plate 211 and the resonant rod 22, and there is no gap or interval between the coupling rib 213 and the second plate 211, and even the coupling rib 213 and the corresponding resonant rod 22 can be seamless. No additional assembly or processing steps are required. Therefore, the assembly, processing, and coupling construction processes of the filter can be simplified, the assembly convenience and efficiency of the filter can be improved, the mass production of the filter can be facilitated, the miniaturization and integration of the filter can be facilitated, and the integration, consistency, and reliability of the filter can be improved.

[0089] Of course, in other embodiments, the coupling rib 213 may also be spaced apart from the surface of the second plate 211. For example, the coupling rib 213 may be integrally connected between the two resonant rods 22. In this case, the coupling rib 213 may be spaced apart from the surface of the second plate 211. Alternatively, after the coupling rib 213 and the second plate 211 are integrally formed, the space between the coupling rib 213 and the second plate 211 may be machined by means of machining or other methods.

[0090] Please seeFigure 5 , Figure 6 , Figure 8 In some embodiments of this application, the resonant rod 22 is provided with multiple rods. The first housing 11 includes an isolation wall 112, one end of which is integrally connected to the first plate 111 along the axial direction of the resonant rod 22, and the other end of which abuts against the second plate 211 along the axial direction of the resonant rod 22; or, the second housing 21 includes an isolation wall 112, one end of which is integrally connected to the second plate 211 along the axial direction of the resonant rod 22, and the other end of which abuts against the first plate 111 along the axial direction of the resonant rod 22.

[0091] It should be noted that this embodiment is applicable to the case where "multiple resonant rods 22 are provided".

[0092] One of the first housing 11 and the second housing 21 may include a partition wall 112. For example... Figure 6 As shown, when the first housing 11 includes an isolation wall 112, the isolation wall 112 can be integrally connected to the first plate 111 and extends to abut against the surface of the second plate 211. Conversely, when the second housing 21 includes an isolation wall 112, the isolation wall 112 can be integrally connected to the second plate 211 and extends to abut against the surface of the first plate 111. The isolation wall 112 can isolate the resonant rod 22 that does not need to be coupled, shield incoherent signals, prevent signal interference, and facilitate the formation of a complete and orderly signal transmission channel inside the filter.

[0093] By adopting the above scheme, when multiple resonant rods 22 are provided, the resonant rods 22 that do not need to be coupled can be isolated as needed by the isolation wall 112, shielding incoherent signals and preventing signal interference. Furthermore, in the integral molding process of the first component 10, the isolation wall 112 is formed together with the first housing 11, and there is no gap or separation between the isolation wall 112 and the first plate 111, requiring no additional assembly or processing steps; or, in the integral molding process of the second component 20, the isolation wall 112 is formed together with the second housing 21, and there is no gap or separation between the isolation wall 112 and the second plate 211, requiring no additional assembly or processing steps. Based on this, the processing, assembly, and coupling / isolation processes of the filter can be simplified, improving the assembly convenience and efficiency of the filter, and facilitating mass production of the filter.

[0094] like Figure 5 , Figure 6 , Figure 8 As shown, in some embodiments, a coupling window 1121 may be provided on the isolation wall 112 as needed to allow the resonant rod 22 that needs to be coupled to achieve coupling.

[0095] It should be noted that the coupling window 1121 is located at the end of the isolation wall 112 away from the plate surface to which it is integrally connected, or the coupling window 1121 extends through the isolation wall 112 along the axial direction of the resonant rod 22. When the isolation wall 112 is integrally connected to the first plate 111, the coupling window 1121 is located at the end of the isolation wall 112 away from the first plate 111, or the coupling window 1121 extends through the isolation wall 112 along the axial direction of the resonant rod 22. In this case, there is no gap between the isolation wall 112 and the first plate 111. When the isolation wall 112 is integrally connected to the second plate 211, the coupling window 1121 is located at the end of the isolation wall 112 away from the second plate 211, or the coupling window 1121 extends through the isolation wall 112 along the axial direction of the resonant rod 22. In this case, there is no gap between the isolation wall 112 and the second plate 211. By positioning the coupling window 1121 at one end of the isolation wall 112 away from the plate it is integrally connected to, or by making the coupling window 1121 penetrate the isolation wall 112 along the axial direction of the resonant rod 22, there can be no gap between the isolation wall 112 and the plate it is integrally connected to. Since the first component 10 is an integrally formed structure and the second component 20 is also an integrally formed structure, after the isolation wall 112 is directly formed together with the first plate 111 or the second plate 211, there is no need to use machining or other methods to process the gap between the isolation wall 112 and the first plate 111 or the second plate 211. That is, the isolation wall 112 can be integrally formed with the plate it is integrally connected to (the first plate 111 or the second plate 211) in one go, without the need for additional processing steps after integral forming. This can improve the processing convenience, processing efficiency and processing accuracy of the isolation wall 112, improve the production convenience and production efficiency of the filter, facilitate the mass production of the filter, and also help reduce the production cost of the filter.

[0096] It should be noted that the coupling window 1121 can be set between two resonant rods 22, so that the two resonant rods 22 opposite each other along the coupling window 1121 can establish a coupling relationship through the coupling window 1121. Furthermore, when the opening range of the coupling window 1121 is large, multiple sets of resonant rods 22 can share the coupling window 1121 to establish the required coupling relationship; that is, in multiple sets of resonant rods 22 sharing the coupling window 1121, the corresponding two resonant rods 22 in each set of resonant rods 22 establish a coupling relationship through the coupling window 1121.

[0097] The coupling window 1121 can be set between two adjacent resonant rods 22 to enable coupling between them. The two adjacent resonant rods 22 are adjacent on the main signal transmission path; that is, the coupling achieved by the coupling window 1121 between them is a coupling relationship on the main signal transmission path. In other words, the coupling relationship between the two resonant rods 22 is cascaded.

[0098] Of course, when the number of resonant rods 22 is at least three, the coupling window 1121 can also be set between two non-adjacent resonant rods 22 to enable cross-coupling between the two resonant rods 22. Two non-adjacent resonant rods 22 mean that they are not adjacent on the main signal transmission path; that is, the coupling achieved by these two resonant rods 22 through the coupling window 1121 is cross-coupling, meaning that the coupling relationship between these two resonant rods 22 is non-cascaded.

[0099] It should also be noted that the coupling window 1121 can also be used to house coupling structures such as the coupling rib 213 and the capacitive coupling structure 30. In some cases, the coupling window 1121 can be small and provide virtually no coupling effect; the coupling window 1121 is only used to house coupling structures such as the coupling rib 213 and the capacitive coupling structure 30, with the coupling structure primarily providing the required coupling effect. In other cases, the coupling window 1121 is used to house coupling structures such as the coupling rib 213 and the capacitive coupling structure 30, and the coupling window 1121 and the coupling structure together provide the required coupling effect to enhance coupling.

[0100] For example, such as Figure 5 , Figure 6 , Figure 8 , Figure 9As shown, in one example of the filter, the first housing 11 includes an isolation wall 112, which is integrally connected to the first plate 111 and extends to abut against the surface of the second plate 211. The isolation wall 112 mainly isolates the first resonant rod 22a and the sixth resonant rod 22f, and the first resonant rod 22a and the tenth resonant rod 22j, so as to prevent coupling between the first resonant rod 22a and the sixth resonant rod 22f, and between the first resonant rod 22a and the tenth resonant rod 22j, thereby shielding incoherent signals, preventing signal interference, and facilitating the formation of a complete and orderly signal transmission channel inside the filter. The isolation wall 112 has a first coupling window 1121a in the region between the second resonant rod 22b and the fourth resonant rod 22d and the fifth resonant rod 22e. This first coupling window 1121a serves both to house the capacitive coupling structure 30, enabling capacitive cross-coupling between the second resonant rod 22b and the fifth resonant rod 22e, and to enable inductive cross-coupling between the second resonant rod 22b and the fourth resonant rod 22d. The isolation wall 112 also has a second coupling window 1121b in the region between the third resonant rod 22c and the fourth resonant rod 22d. This second coupling window 1121b allows the coupling rib 213 located between the third resonant rod 22c and the fourth resonant rod 22d to pass through, thereby enhancing coupling between the third resonant rod 22c and the fourth resonant rod 22d through the second coupling window 1121b and the coupling rib 213. The isolation wall 112 has a third coupling window 1121c in the region between the seventh resonant rod 22g and the eighth resonant rod 22h, so that the seventh resonant rod 22g and the eighth resonant rod 22h can be inductively coupled through the third coupling window 1121c. The isolation wall 112 has a fourth coupling window 1121d in the region between the seventh resonant rod 22g and the eighth resonant rod 22h and the ninth resonant rod 22i and the tenth resonant rod 22j. The fourth coupling window 1121d can be used to allow the coupling rib 213 located between the seventh resonant rod 22g and the ninth resonant rod 22i to pass through, so that the seventh resonant rod 22g and the ninth resonant rod 22i can achieve inductive cross coupling through the fourth coupling window 1121d and the coupling rib 213. It also allows the eighth resonant rod 22h and the ninth resonant rod 22i to achieve inductive coupling through the fourth coupling window 1121d, and the seventh resonant rod 22g and the tenth resonant rod 22j to achieve inductive cross coupling through the fourth coupling window 1121d.

[0101] By adopting the above scheme, when multiple resonant rods 22 are provided, coupling structures such as coupling ribs 213 and capacitive coupling structures 30 can be accommodated as needed through the coupling window 1121 opened in the isolation wall 112. This even allows two resonant rods 22 opposite each other along the coupling window 1121 to establish a coupling relationship through the coupling window 1121. Based on this, it is convenient for multiple resonant rods 22 to establish the required coupling relationship, facilitates the formation of a complete and orderly signal transmission channel inside the filter, and promotes energy transmission according to the preset signal transmission channel, thereby maintaining and optimizing the filter's filtering performance and frequency selectivity characteristics. Furthermore, in the integral molding process of the first component 10, the isolation wall 112 and its coupling window 1121 are formed together with the first housing 11, and the coupling window 1121 does not cause any gap or gap between the isolation wall 112 and the first plate 111, eliminating the need for additional assembly and processing steps; or, in the integral molding process of the second component 20, the isolation wall 112 and its coupling window 1121 are formed together with the second housing 21, and the coupling window 1121 does not cause any gap or gap between the isolation wall 112 and the second plate 211, eliminating the need for additional assembly and processing steps; based on this, the processing steps, assembly steps, and coupling construction steps of the filter can be simplified, improving the assembly convenience and efficiency of the filter, and facilitating mass production of the filter. Moreover, establishing the coupling relationship through the coupling window 1121 helps reduce the number of coupling structures, thereby simplifying the filter structure, promoting miniaturization, simplification, and lightweighting of the filter, and improving the filter's integration, consistency, and reliability.

[0102] Please see Figure 5 , Figure 6 , Figure 8 In some embodiments of this application, multiple resonant rods 22 are provided; the first component 10 and / or the second component 20 include a capacitive coupling structure 30, which is disposed between two resonant rods 22 for capacitive coupling of the two resonant rods 22.

[0103] It should be noted that this embodiment is applicable to the case where "multiple resonant rods 22 are provided".

[0104] The first component 10 and / or the second component 20 include a capacitive coupling structure 30. Specifically, in some embodiments, the first component 10 includes all of the capacitive coupling structure 30, and in the integral molding process of the first component 10, the capacitive coupling structure 30 is integrally molded with the first plate 111. In some embodiments, the second component 20 includes all of the capacitive coupling structure 30, and in the integral molding process of the second component 20, the capacitive coupling structure 30 is integrally molded with the second plate 211. Figure 5As shown, in some embodiments, the first component 10 includes a portion of the capacitive coupling structure 30, and the second component 20 includes another portion of the capacitive coupling structure 30. When the first component 10 and the second component 20 are assembled together, the portion of the capacitive coupling structure 30 located in the first component 10 and the portion of the capacitive coupling structure 30 located in the second component 20 can be simultaneously aligned and assembled to form a complete capacitive coupling structure 30.

[0105] With the first component 10 and the second component 20 assembled together, i.e., in the finished filter state, the capacitive coupling structure 30 is disposed between the two resonant rods 22, enabling capacitive coupling between the two resonant rods 22. The specific construction of the capacitive coupling structure 30 is not limited at this time.

[0106] In this case, there is no gap between the capacitive coupling structure 30 and the plate it is integrally connected to. When "the first component 10 includes the entire capacitive coupling structure 30," in the integral molding process of the first component 10, the capacitive coupling structure 30 is integrally molded with the first plate 111, and there is no gap between the capacitive coupling structure 30 and the first plate 111. When "the second component 20 includes the entire capacitive coupling structure 30," in the integral molding process of the second component 20, the capacitive coupling structure 30 is integrally molded with the second plate 211, and there is no gap between the capacitive coupling structure 30 and the second plate 211. In the case where "the first component 10 includes a portion of the capacitive coupling structure 30, and the second component 20 includes another portion of the capacitive coupling structure 30," there is no gap between the portion of the capacitive coupling structure 30 located in the first component 10 and the first plate 111, and there is also no gap between the portion of the capacitive coupling structure 30 located in the second component 20 and the second plate 211. Based on this, since the first component 10 and the second component 20 are integrally formed structures, after the capacitive coupling structure 30 is directly formed together with the first plate 111 and / or the second plate 211, there is no need to use machining or other methods to process the gap between the capacitive coupling structure 30 and the plate it is integrally connected to. That is, the capacitive coupling structure 30 can be integrally formed with the plate it is integrally connected to (the first plate 111 and / or the second plate 211) in one go, without the need for additional processing steps after integral forming. This can improve the processing convenience, processing efficiency and processing accuracy of the capacitive coupling structure 30, improve the production convenience and production efficiency of the filter, facilitate the mass production of the filter, and also help reduce the production cost of the filter.

[0107] Wherein, when the second component 20 includes all or part of the capacitive coupling structure 30, the capacitive coupling structure 30 may be integrally connected to the resonant rod 22 or may be spaced apart from the resonant rod 22. When the first component 10 includes all or part of the capacitive coupling structure 30 and the first component 10 includes the resonant mating structure 12, the capacitive coupling structure 30 may be integrally connected to the resonant mating structure 12 or may be spaced apart from the resonant mating structure 12.

[0108] The capacitive coupling structure 30 can be disposed between two adjacent resonant rods 22 to achieve capacitive coupling between the two resonant rods 22. The two adjacent resonant rods 22 are adjacent on the main signal transmission path; that is, the coupling achieved by the capacitive coupling structure 30 between these two resonant rods is a coupling relationship on the main signal transmission path. In other words, the coupling relationship between these two resonant rods 22 is cascaded.

[0109] Of course, when the number of resonant rods 22 is at least three, the capacitive coupling structure 30 can also be set between two non-adjacent resonant rods 22 to achieve capacitive cross-coupling between the two resonant rods 22. Two non-adjacent resonant rods 22 mean that they are not adjacent on the main signal transmission path; that is, the coupling achieved by the capacitive coupling structure 30 between these two resonant rods 22 is cross-coupling, meaning that the coupling relationship between these two resonant rods 22 is non-cascaded.

[0110] For example, such as Figure 5 As shown, in one example of the filter, the first component 10 includes a portion of the capacitive coupling structure 30, and the second component 20 includes another portion of the capacitive coupling structure 30. When the first component 10 and the second component 20 are assembled together, the portion of the capacitive coupling structure 30 located in the first component 10 and the portion of the capacitive coupling structure 30 located in the second component 20 can be simultaneously aligned and assembled to form a complete capacitive coupling structure 30. This complete capacitive coupling structure 30 is located between the second resonant rod 22b and the fifth resonant rod 22e, so that the second resonant rod 22b and the fifth resonant rod 22e are capacitively cross-coupled through the capacitive coupling structure 30.

[0111] By adopting the above scheme, and by including a capacitive coupling structure 30 in the first component 10 and / or the second component 20, the capacitive coupling structure 30 can be quickly and accurately positioned between the two resonant rods 22 while the first component 10 and the second component 20 are assembled together, thus achieving capacitive coupling between the two resonant rods 22. Based on this, on the one hand, the required capacitive coupling relationship can be constructed as needed via the capacitive coupling structure 30, facilitating the formation of a complete and orderly signal transmission channel within the filter, promoting energy transmission along the preset signal transmission channel, thereby maintaining and optimizing the filter's filtering performance and frequency selectivity characteristics. On the other hand, the capacitive coupling structure 30 can be formed together in the integral molding process of the first component 10 and / or the second component 20, without additional processing or assembly, thereby simplifying the filter's processing, assembly, and coupling construction processes, improving the filter's assembly convenience and efficiency, reducing assembly costs, and facilitating mass production of the filter. On the one hand, the capacitive coupling structure 30 can be precisely positioned when the first component 10 and the second component 20 are assembled together, and can accurately enable the two pre-set resonant rods 22 to construct the required capacitive coupling relationship, thereby improving the consistency, quality and yield of the filter, and reducing the defect rate and debugging cost of the filter.

[0112] This embodiment is particularly suitable for miniaturized filters. Due to internal space and structural limitations, it is difficult to achieve capacitive coupling in miniaturized filters using traditional methods (such as fly rods, insulating brackets, etc.). However, based on the setup of this embodiment, capacitive coupling can be achieved conveniently, quickly, and reliably while the first component 10 and the second component 20 are assembled, without the need for additional fly rods, insulating brackets, or other structures, making it particularly suitable for the needs of miniaturized filters.

[0113] It should be noted that the relevant embodiments of "the second shell 21 includes coupling rib 213", "the first shell 11 or the second shell 21 includes isolation wall 112", and "the first component 10 and / or the second component 20 includes capacitive coupling structure 30" can be selected, combined in pairs, or all of them can be integrated.

[0114] Of course, in other embodiments, the capacitive coupling structure 30 may be formed independently relative to the first component 10 and the second component 20, and may be separately assembled between the two resonant rods 22 before the first component 10 and the second component 20 are closed and assembled.

[0115] like Figure 4 , Figure 8As shown, in some embodiments, the filter includes a coupling adjustment structure 60, which is separately connected to the first plate 111. The coupling adjustment structure 60 may be disposed between two adjacent coupled resonant rods 22 to adjust the coupling strength between the two resonant rods 22; or, the coupling adjustment structure 60 may be disposed between two cross-coupled resonant rods 22 to adjust the zero-point strength and to tune the passband out-of-band suppression.

[0116] Please see Figure 5 , Figure 6 , Figure 8 In some embodiments of this application, the first component 10 includes a first coupling member 13 integrally connected to the first plate 111, and the second component 20 includes a second coupling member 23 integrally connected to the second plate 211. The first coupling member 13 and the second coupling member 23 extend toward each other and abut against each other to jointly form a capacitive coupling structure 30.

[0117] It should be noted that the first component 10 includes a first coupling member 13. In the integral molding process of the first component 10, the first coupling member 13 is integrally molded with the first plate 111. There is no gap or gap between the first coupling member 13 and the first plate 111. The first coupling member 13 extends from the first plate 111 to the side closer to the second plate 211.

[0118] The second component 20 includes a second coupling member 23. In the integral molding process of the second component 20, the second coupling member 23 is integrally molded with the second plate 211. There is no gap or gap between the second coupling member 23 and the second plate 211. The second coupling member 23 extends from the second plate 211 toward the side closer to the first plate 111.

[0119] When the first component 10 and the second component 20 are assembled together, the first coupling member 13 and the second coupling member 23 abut against each other to form a capacitive coupling structure 30. This capacitive coupling structure 30 can achieve grounding at both ends through the first coupling member 13 and the second coupling member 23, and the capacitive coupling structure 30 can form capacitive coupling rather than inductive coupling between the two resonant rods 22.

[0120] By adopting the above scheme, by including the first coupling member 13 in the first component 10 and the second coupling member 23 in the second component 20, when the first component 10 and the second component 20 are assembled together, the first coupling member 13 and the second coupling member 23 can simultaneously align and abut against each other to form a capacitive coupling structure 30 with both ends grounded. This capacitive coupling structure 30 enables capacitive coupling between the two resonant rods 22. Based on this, on the one hand, the capacitive coupling structure 30 formed by the first coupling member 13 and the second coupling member 23 can promote the two resonant rods 22 to achieve the required capacitive coupling polarity, thereby reducing the design and implementation difficulty of capacitive coupling, accurately realizing capacitive coupling, improving the reliability and consistency of capacitive coupling, thereby optimizing the frequency selection characteristics and filtering performance of the filter, improving the consistency, quality and yield of the filter, and reducing the defect rate and debugging cost of the filter. On the other hand, the first coupling member 13 is integrally formed with the first plate 111 without any gap between them and requires no additional processing. The second coupling member 23 is integrally formed with the second plate 211 without any gap between them and requires no additional processing. When the first component 10 and the second component 20 are assembled together, the first coupling member 13 and the second coupling member 23 can simultaneously achieve mutual alignment and mutual contact. Thus, the forming and assembly of the capacitive coupling structure 30 is combined with the forming and assembly of the first component 10 and the second component 20 without adding additional assembly and processing steps. This simplifies the processing and assembly process of the filter, improves the assembly convenience and efficiency of the filter, and facilitates the mass production of the filter.

[0121] Of course, in other embodiments, the first component 10 may include the entirety of the capacitive coupling structure 30. In the integral molding process of the first component 10, the capacitive coupling structure 30 is integrally molded with the first plate 111, that is, one end of the capacitive coupling structure 30 is integrally connected to the first plate 111. When the first component 10 and the second component 20 are assembled together, the end of the capacitive coupling structure 30 away from the first plate 111 may abut against the second plate 211.

[0122] Alternatively, in other embodiments, the second component 20 may include the entirety of the capacitive coupling structure 30. In the integral molding process of the second component 20, the capacitive coupling structure 30 is integrally molded with the second plate 211 and the resonant rod 22, that is, one end of the capacitive coupling structure 30 is integrally connected to the second plate 211. When the first component 10 and the second component 20 are assembled together, the end of the capacitive coupling structure 30 away from the second plate 211 may abut against the first plate 111.

[0123] Please see Figure 5 In some embodiments of this application, the first coupling member 13 and the second coupling member 23 are welded and fixed.

[0124] It should be noted that when the first component 10 and the second component 20 are assembled together, the first coupling member 13 and the second coupling member 23 are aligned and welded together to form a capacitive coupling structure 30. In some embodiments, to facilitate the welding and fixing of the first coupling member 13 and the second coupling member 23, tin can be applied to a predetermined welding point between the first coupling member 13 and the second coupling member 23 before the first component 10 and the second component 20 are assembled together; then, before the solder paste cures, the first component 10 and the second component 20 are assembled together, thereby simultaneously aligning and welding the first coupling member 13 and the second coupling member 23 together.

[0125] By adopting the above scheme, the first coupling element 13 and the second coupling element 23 can be aligned, abutted, and welded together simultaneously with the first component 10 and the second component 20 being assembled. Based on this, the connection strength, connection firmness, connection reliability, and connection stability between the first coupling element 13 and the second coupling element 23 can be improved. The structural reliability and stability of the capacitive coupling structure 30 formed by the first coupling element 13 and the second coupling element 23 can be improved, enabling the capacitive coupling structure 30 to effectively resist external stresses such as vibration and impact. The risk of displacement or loosening between the first coupling element 13 and the second coupling element 23 can be reduced, thereby improving the durability, reliability, consistency, quality, and yield of the filter. Furthermore, the assembly is simple, allowing the alignment, abutment, and welding together of the first coupling element 13 and the second coupling element 23 to be completed simultaneously with the assembly of the first component 10 and the second component 20, making it suitable for large-scale, mass production of filters.

[0126] Of course, in other embodiments, when the first component 10 and the second component 20 are assembled together, the first coupling member 13 and the second coupling member 23 may simply be aligned and abutted without welding. In this case, the first coupling member 13 and the second coupling member 23 are mainly fixed to each other based on the fixation of the first component 10 and the second component 20.

[0127] Please see Figure 5 In some embodiments of this application, one of the first coupling member 13 and the second coupling member 23 is provided with a stop 231, and the other of the first coupling member 13 and the second coupling member 23 is positioned to abut against the stop 231.

[0128] It should be noted that, as Figure 5 As shown, in some embodiments, the second coupling member 23 has a stop 231 at one end near the first coupling member 13, and the end of the first coupling member 13 near the second coupling member 23 can be positioned to abut against the stop 231. In other embodiments, the first coupling member 13 has a stop 231 at one end near the second coupling member 23, and the end of the second coupling member 23 near the first coupling member 13 can be positioned to abut against the stop 231.

[0129] By adopting the above scheme, and by providing a stop 231 for one of the first coupling member 13 and the second coupling member 23, and positioning the other of the first coupling member 13 and the second coupling member 23 against the stop 231, the stop 231 can serve as a positioning structure, promoting precise alignment between the first coupling member 13 and the second coupling member 23. This improves the alignment accuracy and fit accuracy between the first coupling member 13 and the second coupling member 23, reduces the risk of misalignment or displacement during fit, and improves the consistency, reliability, quality, and yield of the filter. Furthermore, the stop 231 design allows for rapid alignment and contact between the first coupling member 13 and the second coupling member 23, reducing repeated adjustments during assembly, improving assembly efficiency and consistency, and making it suitable for large-scale, mass production of filters.

[0130] Of course, in other embodiments, other positioning structures can be designed between the first coupling member 13 and the second coupling member 23 to achieve precise alignment, such as positioning holes and positioning shafts that are mutually positioned and inserted, etc.

[0131] Alternatively, in other embodiments, the positioning structure between the first coupling member 13 and the second coupling member 23 may be omitted, and the alignment between them can be achieved mainly based on the alignment between the first component 10 and the second component 20.

[0132] Please see Figure 5 In some embodiments of this application, the capacitive coupling structure 30 capacitively couples the first resonator 22x and the second resonator 22y. The first resonator 22x is located on the side of the first coupling member 13 facing away from the second coupling member 23, and the second resonator 22y is located on the side of the second coupling member 23 facing away from the first coupling member 13. The first coupling member 13 is closer to the first resonator 22x relative to the second coupling member 23, and the second coupling member 23 is closer to the second resonator 22y relative to the first coupling member 13.

[0133] It should be noted that, among the two resonant rods 22 that achieve capacitive coupling via the capacitive coupling structure 30, the resonant rod 22 located on the side of the first coupling member 13 facing away from the second coupling member 23 is the first resonator 22x, and the resonant rod 22 located on the side of the second coupling member 23 facing away from the first coupling member 13 is the second resonator 22y. For example, as... Figure 5 As shown, in one example of the filter, the second resonant rod 22b and the fifth resonant rod 22e are capacitively cross-coupled through a capacitive coupling structure 30. The fifth resonant rod 22e is located on the side of the first coupling member 13 facing away from the second coupling member 23, and the fifth resonant rod 22e is the first resonator 22x. The second resonant rod 22b is located on the side of the second coupling member 23 facing away from the first coupling member 13, and the second resonant rod 22b is the second resonator 22y.

[0134] The first coupling member 13 is closer to the first resonator 22x than the second coupling member 23, that is, the first coupling member 13 is closer to the first resonator 22x; the second coupling member 23 is closer to the second resonator 22y than the first coupling member 13, that is, the second coupling member 23 is closer to the second resonator 22y.

[0135] By adopting the above scheme, when the capacitive coupling structure 30 is located between the first resonator 22x and the second resonator 22y, by bringing the first coupling member 13 closer to the first resonator 22x and the second coupling member 23 closer to the second resonator 22y, the capacitive coupling structure 30 can be made to have a Z-shaped overall form. Based on this, the Z-shaped capacitive coupling structure 30 can capacitively couple with the second resonator 22y via the first coupling member 13 and the second resonator 22y via the second coupling member 23, thereby optimizing the structure and shape of the capacitive coupling structure 30, optimizing the layout of the first coupling member 13 and the second coupling member 23, enabling the first resonator 22x and the second resonator 22y to achieve capacitive coupling rather than inductive coupling via the capacitive coupling structure 30, optimizing the capacitive coupling effect between the first resonator 22x and the second resonator 22y via the capacitive coupling structure 30, and thus optimizing the frequency selectivity and filtering performance of the filter.

[0136] Furthermore, based on the configuration of this embodiment, the formation of a "coupling rib structure" by the first coupling member 13 simultaneously abutting against the first resonator 22x and the second resonator 22y can be largely avoided. The formation of a "coupling rib structure" by the second coupling member 23 simultaneously abutting against the first resonator 22x and the second resonator 22y can be largely avoided. The formation of a "wall structure" by the capacitive coupling structure 30 simultaneously abutting against the first plate 111 and the second plate 211, as well as against the first resonator 22x and the second resonator 22y can be largely avoided. This is beneficial for maintaining the coupling effect of the capacitive coupling structure 30, and can enable the first resonator 22x and the second resonator 22y to reliably achieve capacitive coupling (rather than inductive coupling) through the capacitive coupling structure 30, thereby improving the reliability and consistency of the capacitive coupling structure 30.

[0137] Furthermore, based on the configuration of this embodiment, the capacitive coupling structure 30 will be Z-shaped overall, with a gap between the second coupling member 23 and the first plate 111, and a gap between the first coupling member 13 and the second plate 211. Therefore, in the cases where "the first component 10 includes the entirety of the capacitive coupling structure 30" and "the second component 20 includes the entirety of the capacitive coupling structure 30," it is impossible to form the Z-shaped capacitive coupling structure 30 in one piece. It is necessary to first integrally form a rectangular plate-shaped capacitive coupling structure 30, and then perform secondary processing to create the gaps between the second coupling member 23 and the first plate 111, and between the first coupling member 13 and the second plate 211, thus increasing the number of processing steps. In the case where "the first component 10 includes a first coupling member 13, and the second component 20 includes a second coupling member 23," the first coupling member 13 and the second coupling member 23 can directly form a Z-shaped capacitive coupling structure 30 while being aligned and abutting. A gap can also be directly formed between the second coupling member 23 and the first plate 111, or between the first coupling member 13 and the second plate 211, without additional secondary processing, i.e., without considering the processing of the gap. Therefore, this embodiment is particularly suitable for use in conjunction with the embodiment where "the first component 10 includes a first coupling member 13 integrally connected to the first plate 111, the second component 20 includes a second coupling member 23 integrally connected to the second plate 211, and the first coupling member 13 and the second coupling member 23 extend towards each other and abut against each other to jointly form a capacitive coupling structure 30."

[0138] Please see Figure 5 In some embodiments of this application, the first coupling member 13 is arranged near the first resonator 22x and away from the second resonator 22y, and the second coupling member 23 is arranged near the second resonator 22y and away from the first resonator 22x.

[0139] It should be noted that the first coupling element 13 is arranged relatively close to the first resonator 22x and relatively far away from the second resonator 22y. For example, as shown... Figure 5 As shown, in some embodiments, the first coupling member 13 may be spaced apart from the first resonator 22x and the second resonator 22y, and the spacing between the first coupling member 13 and the first resonator 22x is smaller than the spacing between the first coupling member 13 and the second resonator 22y. In other embodiments, the first coupling member 13 may abut against the first resonator 22x and be spaced apart from the second resonator 22y.

[0140] The second coupling element 23 is arranged relatively close to the second resonator 22y and relatively far away from the first resonator 22x. For example, as shown... Figure 5As shown, in some embodiments, the second coupling member 23 may abut against the second resonator 22y and be spaced apart from the first resonator 22x. In other embodiments, the second coupling member 23 may be spaced apart from the second resonator 22y and the first resonator 22x, and the spacing between the second coupling member 23 and the second resonator 22y is smaller than the spacing between the second coupling member 23 and the first resonator 22x.

[0141] By adopting the above scheme, when the capacitive coupling structure 30 is located between the first resonator 22x and the second resonator 22y, by arranging the first coupling member 13 relatively close to the first resonator 22x and relatively far away from the second resonator 22y, and by arranging the second coupling member 23 relatively close to the second resonator 22y and relatively far away from the first resonator 22x, the capacitive coupling structure 30 can be arranged in a wider Z-shape between the first resonator 22x and the second resonator 22y. Based on this, the relatively wide Z-shaped capacitive coupling structure 30 can enhance coupling with the first resonator 22x through proximity to the first coupling member 13, reliably capacitively couple with the second resonator 22y through sufficient distance between the first coupling member 13 and the second resonator 22y, enhance coupling with the second resonator 22y through proximity to the second coupling member 23, and reliably capacitively couple with the first resonator 22x through sufficient distance between the second coupling member 23 and the first resonator 22x. This optimizes the shape of the capacitive coupling structure 30, optimizes the layout of the first coupling member 13 and the second coupling member 23, enables stable and reliable capacitive coupling between the first resonator 22x and the second resonator 22y through the capacitive coupling structure 30, optimizes the effect of capacitive coupling between the first resonator 22x and the second resonator 22y through the capacitive coupling structure 30, and thus optimizes the frequency selectivity and filtering performance of the filter.

[0142] Of course, in other embodiments, the capacitive coupling structure 30 can be arranged relatively close to the first resonator 22x and relatively far away from the second resonator 22y, that is, both the first coupling member 13 and the second coupling member 23 are arranged relatively close to the first resonator 22x and relatively far away from the second resonator 22y. Alternatively, the capacitive coupling structure 30 can be arranged relatively close to the second resonator 22y and relatively far away from the first resonator 22x, that is, both the first coupling member 13 and the second coupling member 23 are arranged relatively close to the second resonator 22y and relatively far away from the first resonator 22x.

[0143] Please see Figure 5 In some embodiments of this application, the second coupling member 23 is integrally connected to the outer peripheral wall of the second resonator 22y and spaced apart from the first resonator 22x.

[0144] It should be noted that, based on the fact that the second coupling member 23 is integrally connected to the surface of the second plate 211, the side of the second coupling member 23 facing away from the first coupling member 13 can be integrally connected to the outer peripheral wall of the second resonator 22y, that is, there is no gap between the "side of the second coupling member 23 facing away from the first coupling member 13" and the "outer peripheral wall of the second resonator 22y"; the side of the second coupling member 23 facing the first coupling member 13 can be spaced apart from the first resonator 22x, so as to enable the second coupling member 23 and the first resonator 22x to be capacitively coupled with each other at a distance.

[0145] By adopting the above scheme, the second coupling member 23 can be integrally connected to both the surface of the second plate 211 and the outer peripheral wall of the second resonator 22y. Based on this, on the one hand, the coupling between the second coupling member 23 and the second resonator 22y can be strengthened, thereby optimizing the capacitive coupling effect between the first resonator 22x and the second resonator 22y via the capacitive coupling structure 30, and optimizing the frequency selectivity and filtering performance of the filter. On the other hand, in the integral molding process of the second component 20, the second coupling member 23 can be integrally molded with the second plate 211 and the second resonator 22y, and there is no gap between the second coupling member 23 and the outer peripheral wall of the second resonator 22y. Therefore, compared with the solution of "leaving a gap between the second coupling member 23 and the outer peripheral wall of the second resonator 22y", the setting of this embodiment can facilitate molding and processing, improve processing accuracy and structural strength, and reduce the risk of poor electrical performance caused by the gap between the second coupling member 23 and the outer peripheral wall of the second resonator 22y. This can improve the consistency, quality and yield of the filter and reduce the defect rate of the filter.

[0146] Of course, in other embodiments, the second coupling member 23 may be spaced apart from the outer peripheral wall of the second resonator 22y, that is, a gap is left between the second coupling member 23 and the outer peripheral wall of the second resonator 22y.

[0147] Please see Figure 5 In some embodiments of this application, a first resonant engagement structure 12a is provided at a distance from the outer periphery of the first resonator 22x, and a first coupling member 13 is integrally connected to the first resonant engagement structure 12a and spaced apart from the second resonator 22y.

[0148] It should be noted that the outer periphery of the first resonator 22x is provided with the resonant coordination structure 12 mentioned above, and the resonant coordination structure 12 provided for the first resonator 22x is defined as the first resonant coordination structure 12a.

[0149] With the first coupling member 13 integrally connected to the surface of the first plate 111, the side of the first coupling member 13 facing away from the second coupling member 23 can be integrally connected to the first resonant mating structure 12a, that is, there is no gap between "the side of the first coupling member 13 facing away from the second coupling member 23" and "the first resonant mating structure 12a"; the side of the first coupling member 13 facing the second coupling member 23 can be spaced apart from the second resonator 22y, so as to enable the first coupling member 13 and the second resonator 22y to be capacitively coupled with each other at a distance.

[0150] By adopting the above scheme, the first coupling member 13 can be integrally connected to both the surface of the first plate 111 and the first resonant coupling structure 12a. Based on this, on the one hand, the coupling between the first coupling member 13 and the first resonator 22x can be strengthened, thereby optimizing the capacitive coupling effect between the first resonator 22x and the second resonator 22y via the capacitive coupling structure 30, and optimizing the frequency selectivity and filtering performance of the filter. On the other hand, in the integral molding process of the first component 10, the first coupling member 13 can be integrally molded with the first plate 111 and the first resonant coupling structure 12a, and there is no gap between the first coupling member 13 and the first resonant coupling structure 12a. Therefore, compared to the scheme of "leaving a gap between the first coupling member 13 and the first resonant coupling structure 12a", the arrangement of this embodiment facilitates molding and processing, improves processing accuracy and structural strength, and reduces the risk of poor electrical performance due to gaps between the first coupling member 13 and the first resonant coupling structure 12a, thereby improving the consistency, quality, and yield of the filter and reducing the defect rate of the filter.

[0151] Of course, in other embodiments, the first coupling member 13 may be spaced apart from the first resonant mating structure 12a, that is, a gap is left between the first coupling member 13 and the first resonant mating structure 12a.

[0152] Please see Figure 5 , Figure 10 In some embodiments of this application, the outer surface of the first housing 11 and / or the second housing 21 is provided with a cavity 212, which is not connected to the enclosed space between the second housing 21 and the first housing 11.

[0153] It should be noted that the outer surfaces of the first housing 11 and / or the second housing 21 are provided with cavities 212. Specifically, in some embodiments, only the outer surface of the first housing 11 is provided with cavities 212. Figure 5 As shown, in some embodiments, only the outer surface of the second housing 21 has a cavity 212. For example... Figure 10 As shown, in some embodiments, both the outer surface of the first housing 11 and the outer surface of the second housing 21 are provided with cavities 212.

[0154] The number of recesses 212 is at least one. The recesses 212 can be located in the thicker areas of the first housing 11 and / or the second housing 21, such as the area corresponding to the resonant rod 22 (e.g.,...). Figure 5 As shown), for example, the area corresponding to the first coupling member 13, the area corresponding to the second coupling member 23 (as shown) Figure 10 (as shown), etc. The cavity 212 can be a hole structure, a groove structure, etc.

[0155] Multiple cavities 212 may be interconnected or not interconnected, but each cavity 212 is not connected to the enclosed space between the second housing 21 and the first housing 11.

[0156] By adopting the above solution, by providing a cavity 212 on the outer surface of the first housing 11 and / or the outer surface of the second housing 21, the local thickness of the first housing 11 and / or the second housing 21 can be reduced based on the cavity 212, thereby reducing the weight of the first housing 11 and / or the second housing 21, which is beneficial to the lightweighting of the filter. Based on this, by preventing the cavity 212 from connecting to the enclosed space between the second housing 21 and the first housing 11, on the one hand, the sealing of the enclosed space between the second housing 21 and the first housing 11 can be maintained, thereby facilitating the reliable shielding function of the second housing 21 and the first housing 11 and preventing signal leakage, thus maintaining the shielding performance of the filter; on the other hand, within the enclosed space between the second housing 21 and the first housing 11, the functional parts with the cavity 212 inside (such as the resonant rod 22, the first coupling element 13, the second coupling element 23, etc.) can have complete surfaces and can normally affect the distribution and transmission of electric field and current, thereby enabling the functional parts with the cavity 212 inside (such as the resonant rod 22, the first coupling element 13, the second coupling element 23, etc.) to work normally and efficiently, thus maintaining the frequency selectivity and filtering performance of the filter.

[0157] Of course, in other embodiments, the outer surface of the first housing 11 and the outer surface of the second housing 21 may not have the cavity 212 provided.

[0158] Please see Figure 5 In some embodiments of this application, at least one resonant rod 22 has a cavity 212 inside.

[0159] It should be noted that a cavity 212 may be provided on the outer surface of the second housing 21 in the region corresponding to at least one resonant rod 22. The cavity 212 may extend along the axial direction of the resonant rod 22. The cavity 212 does not connect to the enclosed space between the second housing 21 and the first housing 11. The cavity 212 does not damage the outer peripheral wall of the resonant rod 22 or the end wall of the resonant rod 22 near the first plate 111. The size of the cavity 212 (e.g., the extension length along the axial direction of the resonant rod 22) may be set as needed.

[0160] By adopting the above scheme, a cavity 212 can be provided on the outer surface of the second housing 21 in the region corresponding to at least one resonant rod 22. Based on this, on the one hand, the thickness and material usage at the resonant rod 22 can be reduced, and the weight at the resonant rod 22 can be reduced, thereby effectively reducing the weight of the second housing 21 and facilitating the lightweighting of the filter. On the other hand, the resonant rod 22 with the cavity 212 inside can still have a complete outer peripheral wall and an end wall close to the first plate 111, and can still normally affect the distribution and transmission of electric field and current, and can still normally perform the resonance effect, thereby maintaining the frequency selectivity characteristics and filtering performance of the filter.

[0161] Please see Figure 5 In some embodiments of this application, at least one resonant rod 22 has a cavity 212 inside, and its end wall near the first plate 111 forms a deformable part 221 that can be deformed under force.

[0162] It should be noted that at least one resonant rod 22 has a cavity 212 inside, and the cavity 212 extends a long length along the axial direction of the resonant rod 22, so that the end wall of the resonant rod 22 near the first plate 111 is thinned to form a deformable part 221 that can be deformed under force.

[0163] By adopting the above scheme, at least one resonant rod 22 can utilize the cavity 212 to thin the end wall of the resonant rod 22 near the first plate 111, thereby forming a deformable portion 221 that can be deformed under force. Based on this, the resonant rod 22 can be tuned using the deformable portion 221. Specifically, during tuning, the deformable portion 221 can be pushed, tapped, or scratched from the cavity 212 to cause at least a portion of the deformable portion 221 to deform towards the side closer to the first plate 111, thereby reducing the distance between at least a portion of the deformable portion 221 and the first plate 111. Conversely, a pulling force can be applied to the deformable portion 221 from the cavity 212 to cause the deformable portion 221 to deform away from the first plate 111, thereby increasing the distance between the deformable portion 221 and the first plate 111. Thus, by adjusting the distance between the deformable portion 221 and the first plate 111, the capacitance between the deformable portion 221 and the first plate 111 can be adjusted, thereby adjusting the resonant frequency. Tuning is convenient and quick. Furthermore, in the integral molding process of the second component 20, the deformable part 221 of the resonant rod 22 can be directly molded and integrally molded by the cavity 212 without additional processing; and since the resonant rod 22 can be tuned through the deformable part 221, the tuning component 40 corresponding to the resonant rod 22 can be omitted from the separate assembly of the first plate 111; therefore, the processing and assembly processes of the filter can be simplified, thereby improving the assembly convenience and efficiency of the filter, which is conducive to the mass production of the filter.

[0164] Please see Figure 11 ,Figure 12 In some embodiments of this application, the first plate 111 has at least one tuning part 1111 that is deformable under force, and the tuning part 1111 is used to adjust the resonant frequency of the resonant rod 22 that is provided therewith.

[0165] It should be noted that the first plate 111 has a thinned and deformable tuning section 1111. The tuning section 1111 has at least one component. For example... Figure 11 , Figure 12 As shown, in some embodiments, the number of tuning sections 1111 can be equal to the number of resonant rods 22, and each tuning section 1111 can be arranged in a one-to-one correspondence with a resonant rod 22. In other embodiments, the number of tuning sections 1111 can be less than the number of resonant rods 22, with some resonant rods 22 having a corresponding tuning section 1111 along their own axial direction, while other resonant rods 22 do not have a corresponding tuning section 1111 along their own axial direction. The tuning section 1111 can be used to adjust the resonant frequency of the resonant rod 22 it corresponds to.

[0166] By adopting the above scheme, the resonant frequency of the resonant rod 22 corresponding to the thinned, deformable tuning part 1111 disposed on the first plate 111 can be adjusted, thereby achieving tuning. Specifically, during tuning, the tuning part 1111 can be pushed, tapped, or scratched to cause at least a portion of the tuning part 1111 to deform towards the resonant rod 22, thereby reducing the distance between at least a portion of the tuning part 1111 and the resonant rod 22; conversely, a pulling force can be applied to the tuning part 1111 to cause it to deform away from the resonant rod 22, thereby increasing the distance between the tuning part 1111 and the resonant rod 22. Thus, by adjusting the distance between the tuning part 1111 and the resonant rod 22, the capacitance between the tuning part 1111 and the resonant rod 22 can be adjusted, thereby adjusting the resonant frequency. Tuning is convenient and quick. Furthermore, in the integral molding process of the first component 10, the tuning part 1111 of the first plate 111 can be directly integrally molded without additional processing; and since the resonant rod 22 is tuned via the tuning part 1111, the separate assembly of the tuning part 40 corresponding to the resonant rod 22 on the first plate 111 can be omitted (e.g., Figure 3 (as shown); therefore, the processing and assembly processes of the filter can be simplified, thereby improving the ease and efficiency of filter assembly and facilitating mass production of the filter.

[0167] Please see Figure 3 , Figure 5 In some embodiments of this application, the filter includes at least one tuning element 40, which is used to adjust the resonant frequency of a corresponding resonant rod 22. The tuning element 40 is threadedly connected to the first plate 111.

[0168] It should be noted that the filter includes a tuning element 40. The tuning element 40 is provided with at least one [e.g., ...]. Figure 3 , Figure 5 , Figure 7 As shown, in some embodiments, the number of tuning elements 40 can be equal to the number of resonant rods 22, and the tuning elements 40 can be arranged in a one-to-one correspondence with the resonant rods 22. In other embodiments, the number of tuning elements 40 can be less than the number of resonant rods 22, with some resonant rods 22 having a corresponding tuning element 40 along their own axial direction, while other resonant rods 22 do not have a corresponding tuning element 40 along their own axial direction.

[0169] It should also be noted that the first plate 111 is provided with a threaded hole 1112, and the tuner 40 is directly threaded to the threaded hole 1112 of the first plate 111, so that the tuner 40 can rotate and move axially relative to the first plate 111, thereby adjusting the length of the part of the tuner 40 that extends into the filter, and thus adjusting the resonant frequency of the resonant rod 22 corresponding to the tuner 40.

[0170] By adopting the above scheme, the tuning component 40 can be assembled separately on the first plate 111 and threaded to the first plate 111, allowing the tuning component 40 to rotate and move axially relative to the first plate 111. This allows adjustment of the length of the portion of the tuning component 40 extending into the filter, thereby adjusting the resonant frequency of the resonant rod 22 corresponding to the tuning component 40, i.e., achieving tuning. Specifically, during tuning, the tuning component 40 can be screwed in relative to the first plate 111 to increase the length of the portion extending into the filter; conversely, the tuning component 40 can be screwed out relative to the first plate 111 to decrease the length of the portion extending into the filter. Thus, the resonant frequency can be adjusted by adjusting the length of the portion of the tuning component 40 extending into the filter, making tuning convenient and quick.

[0171] Furthermore, compared to the next embodiment, this embodiment can omit the nut 50 (e.g. Figure 13 As shown, this can relatively reduce the number of parts, relatively simplify the structure of the filter, facilitate the simplification and weight reduction of the filter, and improve the integration of the filter; it can relatively reduce assembly materials, relatively simplify the assembly process, and improve the assembly convenience and efficiency of the filter.

[0172] Please see Figure 13 , Figure 14 In some embodiments of this application, the filter includes at least one tuning element 40 for adjusting the resonant frequency of a corresponding resonant rod 22. The tuning element 40 passes through the first plate 111 and is threaded to a nut 50.

[0173] It should be noted that the first plate 111 has a through hole, and the tuner 40 passes through the through hole of the first plate 111. The nut 50 can be set on the outside of the first plate 111 or embedded in the through hole of the first plate 111. The tuner 40 is threaded to the nut 50, so that the tuner 40 can rotate and move axially relative to the first plate 111, thereby adjusting the length of the part of the tuner 40 that extends into the filter, and thus adjusting the resonant frequency of the resonant rod 22 corresponding to the tuner 40.

[0174] By adopting the above scheme, the tuning component 40 can be assembled separately from the first plate 111 and threaded onto the nut 50, allowing the tuning component 40 to rotate and move axially relative to the first plate 111. This allows adjustment of the length of the portion of the tuning component 40 extending into the filter, thereby adjusting the resonant frequency of the resonant rod 22 corresponding to the tuning component 40, i.e., achieving tuning. Specifically, during tuning, the tuning component 40 can be screwed in relative to the first plate 111 and the nut 50 to increase the length of the portion extending into the filter; conversely, the tuning component 40 can be screwed out relative to the first plate 111 and the nut 50 to decrease the length of the portion extending into the filter. Thus, by adjusting the length of the portion of the tuning component 40 extending into the filter, the resonant frequency can be adjusted, making tuning convenient and quick.

[0175] Furthermore, compared to the previous embodiment, this embodiment allows the first plate 111 to be integrally formed with a through hole for the tuning component 40 to pass through, without the need to tap a threaded hole 1112 (such as...). Figure 5 As shown in the figure, this simplifies the processing steps of the first component 10 and improves the ease and efficiency of filter assembly.

[0176] Furthermore, it should be noted that the embodiments “at least one resonant rod 22 has a cavity 212 inside, and its end wall near the first plate 111 forms a deformable part 221 that can be deformed under force”, “the first plate 111 has at least one tuning part 1111 that can be deformed under force, and the tuning part 1111 is used to adjust the resonant frequency of the resonant rod 22 corresponding to it”, and “the filter includes at least one tuning element 40, and the tuning element 40 is used to adjust the resonant frequency of the resonant rod 22 corresponding to it” can be selected individually, combined in pairs, or all can be integrated to achieve tuning of all resonant rods 22.

[0177] In particular, one embodiment can be applied where "at least one resonant rod 22 has a cavity 212 inside, and its end wall near the first plate 111 forms a deformable portion 221 that can be deformed under force," or one embodiment can be applied where "the first plate 111 has at least one tuner portion 1111 that can be deformed under force, and the tuner portion 1111 is used to adjust the resonant frequency of the corresponding resonant rod 22," or a combination of the above two embodiments can be applied. Based on this, on the one hand, the separate assembly of any tuner 40 on the first plate 111 can be omitted, thereby significantly reducing the number of filter components, effectively simplifying the filter structure, facilitating the miniaturization, simplification, and weight reduction of the filter, and improving the filter's integration, consistency, and reliability; it can significantly reduce the filter's assembly materials, effectively simplifying the filter's assembly process, especially omitting the individual assembly process for each tuner 40, thereby improving the filter's assembly convenience and efficiency, and facilitating mass production of the filter. On the other hand, it can reduce the overall height and space occupied by the filter, which is beneficial for the miniaturization of the filter. On the one hand, during the tuning process, it can largely prevent impurities such as burrs and debris from falling into the filter, thereby effectively reducing the risk of short circuits causing filter failure and improving the intermodulation stability and power performance of the filter.

[0178] Please see Figure 5 In some embodiments of this application, the tuning element 40 is a tuning screw.

[0179] By adopting the above solution, standardized tuning screws can be directly used as tuning components 40 without additional structural design or customized production of tuning components 40. This reduces design and development time and costs, accelerates product development cycles, reduces complex processing steps, and lowers the production difficulty and processing cost of filters.

[0180] This embodiment is particularly suitable for use in conjunction with the embodiment in which "the filter includes at least one tuning element 40, the tuning element 40 is used to adjust the resonant frequency of the corresponding resonant rod 22, and the tuning element 40 is threadedly connected to the first plate 111". Because the tuning screw is relatively thick, if the first plate 111 directly provides a threaded hole 1112, the diameter of the threaded hole 1112 will be larger, and the machining difficulty of tapping the threaded hole 1112 will be lower. Therefore, "directly tapping the threaded hole 1112 on the first plate 111" is better than "adding a nut 50 and threading the tuning screw to the nut 50 (e.g.)". Figure 14 (As shown) for easy operation. Of course, this embodiment is also suitable for use in conjunction with the embodiment that "the filter includes at least one tuning element 40, the tuning element 40 is used to adjust the resonant frequency of the corresponding resonant rod 22, the tuning element 40 passes through the first plate 111 and is threaded to the nut 50".

[0181] Please see Figure 13 ,Figure 14 In some embodiments of this application, the tuning element 40 includes a screw portion 41 and a disc portion 42 connected to one end of the screw portion 41 near the resonant rod 22. It should be noted that the screw portion 41 has external threads for threaded connection. The disc portion 42 is used to form a capacitor with the resonant rod 22 at a distance.

[0182] By adopting the above scheme, the tuner 40 can be threadedly connected to the first plate 111 or the nut 50 via the screw portion 41, and form a capacitor by the disc portion 42 being aligned with the resonant rod 22 at intervals. Based on this, the tuner 40 can be rotated to move axially relative to the first plate 111, thereby adjusting the length of the portion of the tuner 40 extending into the filter, adjusting the distance between the disc portion 42 and the resonant rod 22, and thus adjusting the resonant frequency of the resonant rod 22 corresponding to the tuner 40. Furthermore, since the disc portion 42 is the main part for adjusting the resonant frequency, the tuner 40 can have a larger cross-sectional dimension of the disc portion 42 perpendicular to the axis of the tuner 40, while the screw portion 41 can have a smaller cross-sectional dimension perpendicular to the axis of the tuner 40 (i.e., the screw portion 41 can be made thinner). Therefore, compared to the tuner 40 of the previous embodiment, the tuner 40 of this embodiment can be "thinner at the top and thicker at the bottom", which can relatively reduce the weight and thus contribute to the lightweighting of the filter.

[0183] This embodiment is particularly suitable for use in conjunction with the embodiment in which "the filter includes at least one tuning element 40, the tuning element 40 is used to adjust the resonant frequency of the corresponding resonant rod 22, the tuning element 40 passes through the first plate 111 and is threaded to the nut 50". This is because the screw portion 41 has a smaller cross-sectional dimension perpendicular to the axial direction of the tuning element 40 (i.e., the screw portion 41 is thinner). Correspondingly, if the first plate 111 directly provides a threaded hole 1112, the diameter of the threaded hole 1112 will be smaller, making the machining of the threaded hole 1112 more difficult. Therefore, "adding a nut 50 and threading the tuning screw to the nut 50" is better than "directly tapping the threaded hole 1112 in the first plate 111 (e.g., ...). Figure 5 (As shown) for easy operation. Of course, this embodiment is also suitable for use in conjunction with the embodiment that "the filter includes at least one tuning element 40, the tuning element 40 is used to adjust the resonant frequency of the corresponding resonant rod 22, and the tuning element 40 is threadedly connected to the first plate 111".

[0184] Please see Figure 3 , Figure 5 , Figure 7 In some embodiments of this application, the first housing 11 includes a housing body 113, one side of which is integrally connected to the first plate 111, and the other side of which is abutted against and welded to the second plate 211.

[0185] It should be noted that the first shell 11 includes a shell body 113. In the integral molding process of the first component 10, the shell body 113 is integrally molded with the first plate 111, and one side of the shell body 113 is integrally connected to the first plate 111.

[0186] When the first component 10 and the second component 20 are assembled together, the side of the shell body 113 away from the first plate 111 can abut against and be welded to the second plate 211, so that the first plate 111, the shell body 113 and the second plate 211 together enclose a closed space, thereby achieving the shielding function and preventing signal leakage.

[0187] The shell body 113 may be, but is not limited to, a polygonal cylindrical shape, a circular cylindrical shape, or any other irregular cylindrical shape.

[0188] By adopting the above scheme, the shell body 113 and the first plate 111 can be integrally formed during the integral molding process of the first component 10. Furthermore, during the assembly of the first component 10 and the second component 20, the side of the shell body 113 away from the first plate 111 can be abutted against and welded to the second plate 211. This quickly and reliably enables the first plate 111, the shell body 113, and the second plate 211 to jointly enclose a closed space, achieving shielding and preventing signal leakage. Based on this, the processing and assembly processes of the filter can be simplified, especially eliminating the assembly process between the shell body 113 and the first plate 111, thereby improving the assembly convenience and efficiency of the filter and facilitating mass production. Furthermore, compared to "part or all of the shell body 113 being integrally formed with the second plate 211", this embodiment makes the entire shell body 113 integrally formed with the first plate 111, which makes it easier to integrally form the second plate 211, each resonant rod 22, and each coupling rib 213 in the integral forming process of the second component 20. This reduces the processing difficulty of the second component 20 and improves the processing accuracy and efficiency of the second component 20.

[0189] Of course, in other embodiments, the shell body 113 may be categorized as part of the second shell 21, with one side of the shell body 113 integrally connected to the second plate 211, and the other side of the shell body 113 abutting against and welded to the first plate 111. In other embodiments, the first shell 11 may include a portion of the shell body 113, and the second shell 21 may include another portion of the shell body 113. When the first shell 11 and the second shell 21 are closed, the two portions of the shell body 113 may be aligned, abutted against, and welded.

[0190] Please see Figure 3 , Figure 6 In some embodiments of this application, the first component 10 is formed by die casting and powder metallurgy. The material of the first component 10 can be set as needed; for example, the first component 10 can be made of aluminum.

[0191] By adopting the above-mentioned scheme and using die casting and powder metallurgy forming technology, the first component 10 can achieve high-efficiency, high-precision, and high-consistency one-piece molding, and can directly form complex structures (such as the first plate 111, isolation wall 112, shell body 113, first coupling component 13, resonant mating structure 12, etc.), which can reduce subsequent machining processes, thereby improving the molding accuracy, structural strength, and structural consistency of the first component 10, simplifying the filter manufacturing process, improving the filter's production efficiency, production accuracy, production yield, and product performance, reducing material waste, lowering production costs, and making it suitable for large-scale, mass production of filters.

[0192] Of course, in other embodiments, the first component 10 may be formed in other integral ways.

[0193] Please see Figure 3 , Figure 7 , Figure 8 In some embodiments of this application, the second component 20 is formed by powder metallurgy. The material of the second component 20 can be set as needed; for example, the second component 20 can be made of stainless steel or iron.

[0194] By adopting the above-mentioned scheme and using powder metallurgy forming technology, the second component 20 can achieve high-efficiency, high-precision, and high-consistency one-piece forming. It can directly form complex structures in the second component 20 (such as the second plate 211, resonant rod 22, coupling rib 213, second coupling element 23, cavity 212, etc.), and reduce subsequent machining processes. This can improve the forming accuracy, structural strength, and structural consistency of the second component 20, simplify the filter manufacturing process, improve the filter's production efficiency, production accuracy, production yield, and product performance, reduce material waste, lower production costs, and make it suitable for large-scale, mass production of filters.

[0195] Of course, in other embodiments, the second component 20 may be integrally molded in other ways.

[0196] Please see Figure 15 Please refer to the following: Figure 3 , Figure 5 , Figure 6 , Figure 7 Some embodiments of this application provide a method for manufacturing a filter, applicable to manufacturing the filter provided in the embodiments of this application, including the following steps:

[0197] S1. The first component 10 is formed by die casting and powder metallurgy, and the second component 20 is formed by powder metallurgy. The first component 10 achieves high-efficiency, high-precision, and high-consistency one-piece forming through die casting and powder metallurgy, especially capable of directly forming complex structures (e.g., the first plate 111, the isolation wall 112, the shell body 113, the first coupling element 13, the resonant mating structure 12, etc.). The second component 20 achieves high-efficiency, high-precision, and high-consistency one-piece forming through powder metallurgy, especially capable of directly forming complex structures within the second component 20 (e.g., the second plate 211, the resonant rod 22, the coupling rib 213, the second coupling element 23, the cavity 212, etc.). The forming processes of the first component 10 and the second component 20 can be performed simultaneously or sequentially.

[0198] S2. Apply solder paste to the predetermined soldering position between the first component 10 and the second component 20. That is, before the first component 10 and the second component 20 are assembled together, apply solder paste (i.e., apply solder paste) to the predetermined soldering position between the first component 10 and the second component 20. The predetermined soldering position between the first component 10 and the second component 20 may include, but is not limited to, the abutment between the first housing 11 and the second housing 21 (e.g., the abutment between the housing body 113 and the second plate 211), the abutment between the first coupling member 13 and the second coupling member 23, etc.

[0199] S3. Cover the first component 10 and the second component 20, and weld the first component 10 and the second component 20 together. That is, before the solder paste is cured, cover and assemble the first component 10 and the second component 20 together, so that the contact between the first component 10 and the second component 20 is welded together by the solder paste applied in advance. For example, the first housing 11 and the second housing 21 are welded together, or the first coupling member 13 and the second coupling member 23 are welded together, and so on.

[0200] By adopting the above solution, the filter can be manufactured and assembled quickly, simply, and conveniently with very few steps. In particular, during the assembly of the first component 10 and the second component 20, the filter already has multiple resonant rods 22 arranged as needed inside, and each resonant rod 22 automatically establishes the required coupling relationship via coupling ribs 213, coupling windows 1121, and capacitive coupling structures 30, without the need to add or assemble other materials inside the filter. This significantly reduces the amount of assembly materials required for the filter, greatly simplifies the assembly process, and eliminates the need for individual assembly processes for each internal structure, thereby improving the convenience and efficiency of filter production and facilitating mass production.

[0201] Based on the above embodiments, this application provides a specific example of a filter, wherein, Figures 3-8 This is a schematic diagram of the structure of this filter example. Figure 9 This is a schematic diagram of the topology of this filter example. Figure 16 The image shows a simulated waveform of this filter example. The filter includes a first component 10 and a second component 20.

[0202] The first component 10 is an integrally formed structure, which is formed by die casting and powder metallurgy. The first component 10 includes a first shell 11, a resonant mating structure 12, and a first coupling member 13. The first shell 11 includes a first plate 111, a shell body 113, and a partition wall 112. One side of the shell body 113 is integrally connected to the first plate 111. The partition wall 112 is disposed within the enclosed space of the first plate 111 and the shell body 113, and one side of the partition wall 112 is integrally connected to the first plate 111.

[0203] The second component 20 is a one-piece molded structure, formed by powder metallurgy. The second component 20 includes a second housing 21, a resonant rod 22, and a second coupling member 23. The second housing 21 includes a second plate 211 disposed opposite to the first plate 111, and a coupling rib 213 integrally connected to the second plate 211. The first housing 11 covers the second housing 21, the main body 113 abuts against and is welded to the second plate 211, and the side of the isolation wall 112 away from the first plate 111 abuts against the second plate 211.

[0204] The resonant rod 22 is disposed within the enclosed space of the second housing 21 and the first housing 11. The outer surface of the second housing 21 has a cavity 212 in the region corresponding to each resonant rod 22. The cavity 212 is not connected to the enclosed space of the second housing 21 and the first housing 11.

[0205] The resonant rod 22 is integrally connected to the second plate 211 and spaced apart from the first plate 111. The cross-sectional dimensions of the resonant rod 22 are either gradually reduced or remain unchanged in the direction away from the second plate 211. The resonant mating structure 12 is integrally connected to the side of the first plate 111 facing the second plate 211. The resonant mating structure 12 is arranged one-to-one with the resonant rod 22, and is spaced apart from the outer periphery of the resonant rod 22. The resonant mating structure 12 is spaced apart from the outer periphery wall of the corresponding resonant rod 22. The resonant rod 22 can form a parallel plate capacitor not only through the end wall of the resonant rod 22 away from the second plate 211 and spaced apart from the first plate 111, but also through the outer periphery wall of the resonant rod 22 and spaced apart from the resonant mating structure 12. This increases the total capacitance between the resonant rod 22 and the first plate 111, and between the resonant rod 22 and the resonant mating structure 12, and reduces the resonant frequency generated by the resonant rod 22. The filter includes a tuning element 40 that corresponds to the resonant rod 22. The tuning element 40 is a tuning screw that is threaded to the first plate 111. The tuning element 40 is used to adjust the resonant frequency of the resonant rod 22 that corresponds to it.

[0206] The filter has ten resonant rods 22, namely, the first resonant rod 22a, the second resonant rod 22b, the third resonant rod 22c, the fourth resonant rod 22d, the fifth resonant rod 22e, the sixth resonant rod 22f, the seventh resonant rod 22g, the eighth resonant rod 22h, the ninth resonant rod 22i, and the tenth resonant rod 22j. The filter also includes two signal transmission terminals 70, one connected to the first resonant rod 22a and the other connected to the tenth resonant rod 22j. The main signal transmission path is the path along which the signal is transmitted sequentially from the first resonant rod 22a, the second resonant rod 22b, the third resonant rod 22c, the fourth resonant rod 22d, the fifth resonant rod 22e, the sixth resonant rod 22f, the seventh resonant rod 22g, the eighth resonant rod 22h, the ninth resonant rod 22i, and the tenth resonant rod 22j.

[0207] Inductive coupling is achieved between the first resonant rod 22a and the second resonant rod 22b, between the second resonant rod 22b and the third resonant rod 22c, between the third resonant rod 22c and the fourth resonant rod 22d, between the fourth resonant rod 22d and the fifth resonant rod 22e, between the fifth resonant rod 22e and the sixth resonant rod 22f, between the sixth resonant rod 22f and the seventh resonant rod 22g, and between the ninth resonant rod 22i and the tenth resonant rod 22j, respectively, through coupling ribs 213. Inductive cross-coupling is achieved between the seventh resonant rod 22g and the ninth resonant rod 22i through coupling ribs 213.

[0208] The isolation wall 112 is mainly used to isolate the first resonant rod 22a and the sixth resonant rod 22f, and the first resonant rod 22a and the tenth resonant rod 22j, so as to prevent the formation of coupling between the first resonant rod 22a and the sixth resonant rod 22f, and between the first resonant rod 22a and the tenth resonant rod 22j. This can shield incoherent signals, prevent signal interference, and facilitate the formation of a complete and orderly signal transmission channel inside the filter.

[0209] The isolation wall 112 has a first coupling window 1121a in the region between the second resonant rod 22b and the fourth resonant rod 22d and the fifth resonant rod 22e. The first coupling window 1121a is used to house the capacitive coupling structure 30 so that the second resonant rod 22b and the fifth resonant rod 22e can be capacitively cross-coupled through the capacitive coupling structure 30, and also to enable the second resonant rod 22b and the fourth resonant rod 22d to be inductively cross-coupled through the first coupling window 1121a.

[0210] The isolation wall 112 has a second coupling window 1121b in the region between the third resonant rod 22c and the fourth resonant rod 22d. The second coupling window 1121b can be used to allow the coupling rib 213 located between the third resonant rod 22c and the fourth resonant rod 22d to pass through, so that the third resonant rod 22c and the fourth resonant rod 22d can achieve inductive coupling through the second coupling window 1121b and the coupling rib 213, thereby enhancing the coupling.

[0211] The isolation wall 112 has a third coupling window 1121c in the region between the seventh resonant rod 22g and the eighth resonant rod 22h, so that the seventh resonant rod 22g and the eighth resonant rod 22h can be inductively coupled through the third coupling window 1121c.

[0212] The isolation wall 112 has a fourth coupling window 1121d in the region between the seventh resonant rod 22g and the eighth resonant rod 22h and the ninth resonant rod 22i and the tenth resonant rod 22j. The fourth coupling window 1121d can be used to allow the coupling rib 213 located between the seventh resonant rod 22g and the ninth resonant rod 22i to pass through, so that the seventh resonant rod 22g and the ninth resonant rod 22i can achieve inductive cross coupling through the fourth coupling window 1121d and the coupling rib 213. It also allows the eighth resonant rod 22h and the ninth resonant rod 22i to achieve inductive coupling through the fourth coupling window 1121d, and the seventh resonant rod 22g and the tenth resonant rod 22j to achieve inductive cross coupling through the fourth coupling window 1121d.

[0213] The first coupling member 13 is integrally connected to the first plate 111 and to the resonant mating structure 12 corresponding to the fifth resonant rod 22e, and is spaced apart from the second resonant rod 22b. The second coupling member 23 is integrally connected to the second plate 211 and to the outer peripheral wall of the second resonant rod 22b, and is spaced apart from the fifth resonant rod 22e. The end of the second coupling member 23 facing the first coupling member 13 has a stop 231, and the end of the first coupling member 13 facing the second coupling member 23 is positioned and abuts against the stop 231. The first coupling member 13 and the second coupling member 23 are aligned and welded together to form a Z-shaped capacitive coupling structure 30. The capacitive coupling structure 30 is located between the second resonant rod 22b and the fifth resonant rod 22e, so that the second resonant rod 22b and the fifth resonant rod 22e are capacitively cross-coupled through the capacitive coupling structure 30.

[0214] Based on the above structure, the filter can be manufactured and assembled quickly, simply, and conveniently with very few processing and assembly steps. In particular, when the first component 10 and the second component 20 are assembled together, the filter already has multiple resonant rods 22 arranged as needed inside. Each resonant rod 22 automatically establishes the required coupling relationship via coupling ribs 213, coupling windows 1121, and capacitive coupling structures 30, without needing to add or assemble other materials inside the filter, nor requiring additional processing to form the required gaps. Therefore, the amount of assembly materials for the filter can be greatly reduced, the processing, assembly, and coupling construction steps of the filter can be greatly simplified, and the individual assembly steps of each internal structure of the filter can be omitted, thereby improving the convenience and efficiency of filter production and facilitating mass production of the filter.

[0215] Furthermore, it can reduce the number of filter components and simplify the filter structure, thereby facilitating the miniaturization, simplification, and weight reduction of the filter. It can also improve the integration, consistency, and reliability of the filter, and reduce the material and production costs of the filter.

[0216] Furthermore, the second resonant bar 22b, the third resonant bar 22c, the fourth resonant bar 22d, and the fifth resonant bar 22e can form a CQ (Cascaded Quadruplet) structure, generating one zero at both the high and low ends of the filter's passband. The seventh resonant bar 22g, the eighth resonant bar 22h, the ninth resonant bar 22i, and the tenth resonant bar 22j can form a CQ structure, generating two zeros at the high end of the filter's passband. Thus, this filter can achieve a 10-cavity, 4-zero design, enabling a large number of zeros and strong out-of-band suppression. This allows the filter to effectively filter out clutter and interference signals, achieving superior filtering performance and better meeting the requirements for miniaturized, highly selective filters.

[0217] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A filter, characterized in that, include: The first component is an integrally molded structure, and the first component includes a first housing, which includes a first plate. The second component is an integrally formed structure. The second component includes a second housing and at least one resonant rod. The second housing covers the first housing. The second housing includes a second plate disposed opposite to the first plate. The resonant rod is disposed within the enclosed space of the second housing and the first housing. The resonant rod is integrally connected to the second plate and spaced apart from the first plate. The cross-sectional dimensions of the resonant rod are either gradually reduced or remain unchanged in the direction away from the second plate.

2. The filter as described in claim 1, characterized in that, The first component includes a resonant engagement structure, which is integrally connected to the side of the first plate facing the second plate. The resonant engagement structure is provided on the outer periphery of at least one of the resonant rods, and the resonant engagement structure is spaced apart from the outer peripheral wall of the corresponding resonant rod.

3. The filter as described in claim 2, characterized in that, The resonant fitting structure is configured in a one-to-one correspondence with the resonant rod.

4. The filter as described in claim 2, characterized in that, The resonant structure is a ring structure, which is sleeved on the outer periphery of the corresponding resonant rod, and the inner ring wall of the ring structure is spaced apart from the outer periphery wall of the corresponding resonant rod.

5. The filter as described in claim 1, characterized in that, The resonant rod is provided in multiple forms; The second housing includes a coupling rib, which is integrally connected to the second plate and located between the two resonant rods.

6. The filter as described in claim 1, characterized in that, The resonant rod is provided in multiple forms; The first housing includes an isolation wall, one end of which is integrally connected to the first plate along the axial direction of the resonant rod, and the other end of which abuts against the second plate along the axial direction of the resonant rod; or, the second housing includes an isolation wall, one end of which is integrally connected to the second plate along the axial direction of the resonant rod, and the other end of which abuts against the first plate along the axial direction of the resonant rod.

7. The filter as described in claim 1, characterized in that, The resonant rod is provided in multiple forms; The first component and / or the second component includes a capacitive coupling structure disposed between the two resonant rods for capacitively coupling the two resonant rods.

8. The filter as described in claim 7, characterized in that, The first component includes a first coupling member integrally connected to the first plate, and the second component includes a second coupling member integrally connected to the second plate. The first coupling member and the second coupling member extend toward each other and abut against each other to jointly form the capacitive coupling structure.

9. The filter as described in claim 8, characterized in that, The first coupling element and the second coupling element are welded and fixed together.

10. The filter as described in claim 8, characterized in that, One of the first coupling member and the second coupling member is provided with a stop, and the other of the first coupling member and the second coupling member is positioned to abut against the stop.

11. The filter as described in claim 8, characterized in that, The capacitive coupling structure capacitively couples a first resonator and a second resonator. The first resonator is located on the side of the first coupling member facing away from the second coupling member, and the second resonator is located on the side of the second coupling member facing away from the first coupling member. The first coupling member is closer to the first resonator than the second coupling member, and the second coupling member is closer to the second resonator than the first coupling member.

12. The filter as claimed in claim 11, characterized in that, The first coupling member is arranged near the first resonator and away from the second resonator, and the second coupling member is arranged near the second resonator and away from the first resonator.

13. The filter as described in claim 11, characterized in that, The second coupling element is integrally connected to the outer peripheral wall of the second resonator and spaced apart from the first resonator; And / or, the outer periphery of the first resonator is provided with a first resonant engagement structure, the first coupling member is integrally connected to the first resonant engagement structure, and is spaced apart from the second resonator.

14. The filter as described in any one of claims 1-13, characterized in that, The outer surface of the first housing and / or the second housing is provided with a cavity, which is not connected to the enclosed space between the second housing and the first housing.

15. The filter as described in claim 14, characterized in that, At least one of the resonant rods has the cavity inside.

16. The filter as claimed in claim 14, characterized in that, At least one of the resonant rods has the cavity inside, and a deformable part that can be deformed under force is formed near the end wall of the first plate.

17. The filter as described in any one of claims 1-13, characterized in that, The first plate has at least one tuning part that can be deformed under force, the tuning part being used to adjust the resonant frequency of the resonant rod that is provided therewith.

18. The filter as described in any one of claims 1-13, characterized in that, The filter includes at least one tuning element, which is used to adjust the resonant frequency of the resonant rod that is correspondingly set thereto; The tuning element is threadedly connected to the first plate; or, the tuning element passes through the first plate and is threadedly connected to a nut.

19. The filter as claimed in claim 18, characterized in that, The tuning component is a tuning screw; Alternatively, the tuning element may include a screw portion and a disk portion connected to one end of the screw portion near the resonant rod.

20. The filter as described in any one of claims 1-13, characterized in that, The first housing includes a housing body, one side of which is integrally connected to the first plate, and the other side of which abuts against and is welded to the second plate.

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