Filter

Abstract

The utility model relates to the technical field of filters, and provides a filter, which comprises a cavity, a multi-mode resonator, a single-mode resonator and a plurality of couplers, the multi-mode resonator, the single-mode resonator and the plurality of couplers are all arranged in the cavity, the multi-mode resonator comprises a plurality of groups of resonance parts, and the multiple groups of resonance parts are arranged in the cavity. And the plurality of coupling pieces are used for realizing coupling of the resonance modes generated by the at least two groups of resonance parts and the single-mode resonator. The plurality of couplers in the filter can respectively realize the coupling of the resonant modes generated by the corresponding groups of resonant parts of the multi-mode resonator and the single-mode resonator, that is, the single-mode resonator can transmit signals to at least two resonant modes in the multi-mode resonator through the corresponding couplers, so that the signal transmission modes are more; the problem that the signal transmission mode is single is solved.

Description

Technical Field

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

[0002] Traditional single-mode resonators can achieve the purpose of single resonance, and the implementation method is relatively simple, but multiple single-mode resonators are combined together to achieve filtering, resulting in a larger filter volume; while multi-mode resonators can achieve the purpose of multiple resonances in one resonator, thereby reducing the size of the filter, but the implementation method is relatively complex. Therefore, single-mode resonators and multi-mode resonators are usually used in combination in filters.

[0003] The multi-mode resonator includes at least two groups of resonant parts. Taking two groups of resonant parts as an example, usually, the single-mode resonator is coupled with the resonant mode generated by the first group of resonant parts through a coupling window or a metal probe, and the signal is transmitted from the single-mode resonator to the first group of resonant parts. The signal transmission method is relatively simple. Utility Model Content

[0004] In view of this, an embodiment of the present application provides a filter to solve the problem of a relatively single signal transmission method.

[0005] An embodiment of the present application proposes a filter, comprising a cavity, a multi-mode resonator, a single-mode resonator and a plurality of coupling components, wherein the multi-mode resonator, the single-mode resonator and the plurality of coupling components are all arranged in the cavity, the multi-mode resonator comprises a plurality of groups of resonant parts, and the plurality of coupling components are used to achieve coupling of the resonant modes generated by at least two groups of the resonant parts with the single-mode resonator.

[0006] The filter provided in the embodiment of the present application includes a cavity, a multi-mode resonator, a single-mode resonator and a plurality of coupling components, wherein the multi-mode resonator, the single-mode resonator and the plurality of coupling components are all arranged in the cavity; the plurality of coupling components can respectively realize the coupling of the resonant modes generated by the corresponding groups of resonant parts of the multi-mode resonator with the single-mode resonator, that is, the single-mode resonator can transmit the signal to at least two resonant modes in the multi-mode resonator through the corresponding coupling components, so that there are more ways to transmit the signal, which solves the problem of the relatively single way of signal transmission.

[0007] In some embodiments, the multi-mode resonator is a dual-mode resonator, the dual-mode resonator includes a first group of resonant parts and a second group of resonant parts, the connection direction of the first group of resonant parts and the center point of the dual-mode resonator is a first direction, the connection direction of the second group of resonant parts and the center point of the dual-mode resonator is a second direction, and the first direction is perpendicular to the second direction; the multiple coupling members include a first coupling member and a second coupling member, the first coupling member is used to realize the coupling of the resonant mode generated by the first group of resonant parts with the single-mode resonator, and the second coupling member is used to realize the coupling of the resonant mode generated by the second group of resonant parts with the single-mode resonator.

[0008] In some embodiments, a support wall is provided in the cavity, the first coupling member is an electrical coupling member, the first coupling member includes an insulating seat and a metal member provided on the insulating seat, the insulating seat is fixed on the support wall, one end of the metal member is opposite to the single-mode resonator, and the other end of the metal member is opposite to the first group of resonant parts in the first direction.

[0009] In some embodiments, the second coupling member is a magnetic coupling member, and the second coupling member includes a first protrusion, a connecting portion, a coupling portion, and a second protrusion connected in sequence, the first protrusion and the second protrusion are both fixed to the bottom wall of the cavity, and the connecting portion and the coupling portion are both suspended; the first protrusion is connected to the single-mode resonator, and the second protrusion is arranged close to the multi-mode resonator; the coupling portion is parallel to the second direction.

[0010] In some embodiments, the connecting portion includes a first connecting segment and a second connecting segment connected to each other, the second connecting segment is connected to the coupling portion; the first connecting segment extends along the arrangement direction of the single-mode resonator and the dual-mode resonator, and the second connecting segment extends along the axial direction of the single-mode resonator.

[0011] In some embodiments, the first coupling element is an electric coupling element for realizing electrical coupling between the resonance mode generated by the first group of resonance parts and the single-mode resonator, and the second coupling element is a magnetic coupling element for realizing magnetic coupling between the resonance mode generated by the second group of resonance parts and the single-mode resonator.

[0012] In some embodiments, the single-mode resonator, the electric coupling element and the multi-mode resonator are arranged in a line, and the single-mode resonator, the magnetic coupling element and the multi-mode resonator are arranged in a line, and the magnetic coupling element is below the electric coupling element.

[0013] In some embodiments, the single-mode resonator is a dielectric resonator; or, the single-mode resonator is a dielectric-loaded metal resonator.

[0014] In some embodiments, the dual-mode resonator is a cylindrical structure, and the resonating portion includes a resonant hole.

[0015] In some embodiments, the number of the single-mode resonators is plural, and at least two of the single-mode resonators are coupled to the multi-mode resonator.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 is a schematic diagram of the structure of the filter provided in some embodiments of the present application;

[0019] Figure 2 yes Figure 1 The schematic diagram of the structure of the filter from the first perspective after the cavity is removed;

[0020] Figure 3 yes Figure 1 A schematic diagram of the structure of the filter from a second viewing angle after the cavity is removed;

[0021] Figure 4 yes Figure 2 A schematic structural diagram of the first coupling member;

[0022] Figure 5 yes Figure 2 A schematic structural diagram of the second coupling member;

[0023] Figure 6 It is a schematic diagram of the structure of the filter after removing the cavity provided in other embodiments of the present application.

[0024] The meanings of the marks in the figure are:

[0025] 10. Filter;

[0026] 11. cavity; 111. support wall; 112. mounting column;

[0027] 12. multi-mode resonator; 121. resonating part; 1211. first group of resonating parts; 1212. second group of resonating parts; 122. fixing hole;

[0028] 13. Single-mode resonator;

[0029] 14. first coupling member; 141. insulating seat; 142. metal member;

[0030] 15, second coupling member; 151, first convex portion; 152, second convex portion; 153, connecting portion; 1531, first connecting section; 1532, second connecting section; 154, coupling portion;

[0031] 16. Coupling parts;

[0032] 17. Metal coupling rib; 171. Coupling section. DETAILED DESCRIPTION

[0033] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0035] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0036] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0038] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0039] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0040] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0041] At present, single-mode resonators and multi-mode resonators are usually used in combination in filters to reduce the size of the filter. Taking the combination of single-mode resonators and dual-mode resonators as an example, the single-mode resonator is usually coupled with the resonant mode generated by the first group of resonant parts of the dual-mode resonator through a coupling window or a metal probe, and the signal is transmitted from the single-mode resonator to the first group of resonant parts. The signal transmission method is relatively simple.

[0042] In order to solve the problem of a relatively single signal transmission method, an embodiment of the present application provides a filter.

[0043] Please refer to Figure 1 The filter 10 includes a cavity 11, a multi-mode resonator 12, a single-mode resonator 13, and a plurality of coupling members 16. The multi-mode resonator 12, the single-mode resonator 13, and the plurality of coupling members 16 are all arranged in the cavity 11, the multi-mode resonator 12 includes a plurality of groups of resonant parts 121, and the plurality of coupling members 16 are used to achieve coupling between the resonant modes generated by at least two groups of resonant parts 121 and the single-mode resonator 13.

[0044] The cavity 11 has a housing cavity, which is used to accommodate the multi-mode resonator 12, the single-mode resonator 13 and the plurality of coupling members 16; wherein the housing cavity may have various shapes, for example, the housing cavity may be a straight row cavity, a zigzag cavity, etc. wherein the cavity 11 is made of a metal material, for example, the metal material may be aluminum, steel, copper, etc.

[0045] The multimode resonator 12 is in the cavity 11, and can realize two or more resonance modes according to the number, structure and position arrangement of the resonance parts 121, that is, realize the purpose of multiple resonances of one resonator, thereby reducing the volume of the filter 10. The multimode resonator 12 can be a dielectric resonator.

[0046] The single-mode resonator 13 is in the cavity 11 and has only one resonance mode, that is, it achieves the purpose of single resonance. It can be understood that the single-mode resonator 13 can be a dielectric resonator, a metal resonator, or a metal resonator loaded with a dielectric.

[0047] The coupling element 16 is in the cavity 11, and each coupling element 16 can realize coupling between the resonant mode generated by one group of the resonant parts 121 and the single-mode resonator 13. The coupling element 16 can be an electric coupling element that realizes electrical coupling between the resonant mode generated by the resonant part 121 and the single-mode resonator 13, or a magnetic coupling element that realizes magnetic coupling between the resonant mode generated by the resonant part 121 and the single-mode resonator 13.

[0048] The filter 10 provided in the embodiment of the present application includes a cavity 11, a multi-mode resonator 12, a single-mode resonator 13 and a plurality of coupling members 16. The multi-mode resonator 12, the single-mode resonator 13 and the plurality of coupling members 16 are all arranged in the cavity 11; the plurality of coupling members 16 can respectively realize the coupling of the resonant mode generated by the corresponding group of resonant parts 121 of the multi-mode resonator 12 with the single-mode resonator 13, that is, the single-mode resonator 13 can transmit the signal to at least two resonant modes in the multi-mode resonator 12 through the corresponding coupling members 16, so that there are more ways to transmit the signal, which solves the problem of a relatively single way of signal transmission.

[0049] Please also refer to Figure 1 and Figure 2In some embodiments, the multi-mode resonator 12 is a dual-mode resonator, and the dual-mode resonator includes a first group of resonant parts 1211 and a second group of resonant parts 1212. The direction of the line connecting the first group of resonant parts 1211 and the center point of the dual-mode resonator is a first direction X, and the direction of the line connecting the second group of resonant parts 1212 and the center point of the dual-mode resonator is a second direction Y, and the first direction X is perpendicular to the second direction Y; the plurality of coupling members 16 include a first coupling member 14 and a second coupling member 15, and the first coupling member 14 is used to realize the coupling of the resonant mode generated by the first group of resonant parts 1211 with the single-mode resonator 13, and the second coupling member 15 is used to realize the coupling of the resonant mode generated by the second group of resonant parts 1212 with the single-mode resonator 13.

[0050] The plurality of coupling members 16 include a first coupling member 14 and a second coupling member 15 , which means that at least one of the plurality of coupling members 16 is the first coupling member 14 , and at least one of the plurality of coupling members 16 is the second coupling member 15 .

[0051] The dual-mode resonator can realize a first resonance mode through the first group of resonance parts 1211 , and the dual-mode resonator can realize a second resonance mode through the second group of resonance parts 1212 ; wherein the first resonance mode and the second resonance mode are arranged orthogonally.

[0052] When in use, the single-mode resonator 13 can transmit signals to the resonance mode generated by the first group of resonance parts 1211 through the first coupling member 14 , and the single-mode resonator 13 can also directly transmit signals to the resonance mode 1212 generated by the second group of resonance parts through the second coupling member 15 .

[0053] The dual-mode resonator provided in the embodiment of the present application has a relatively simple structure while satisfying a plurality of signal transmission modes, does not complicate the structure of the filter 10 , and can reduce costs.

[0054] In other embodiments, the multi-mode resonator 12 may be a three-mode resonator.

[0055] In some embodiments, the first coupling element 14 is an electric coupling element for realizing electric coupling between the resonant mode generated by the first group of resonant parts 1211 and the single-mode resonator 13 , and the second coupling element 15 is a magnetic coupling element for realizing magnetic coupling between the resonant mode generated by the second group of resonant parts 1212 and the single-mode resonator 13 .

[0056] Since the resonance mode generated by the first group of resonance parts 1211 and the resonance mode generated by the second group of resonance parts 1212 are arranged orthogonally, and the magnetic field and the electric field are orthogonal, the first coupling member 14 can be directly opposite to the single-mode resonator 13, and the first coupling member 14 can be directly opposite to the first group of resonance parts 1211 in the first direction X to achieve electrical coupling between the resonance mode generated by the first group of resonance parts 1211 and the single-mode resonator 13, wherein the first coupling member 14 is not grounded; at the same time, the second coupling member 15 is connected to the single-mode resonator 13, and the coupling part of the second coupling member 15 is parallel to the second direction Y, so as to achieve magnetic coupling between the resonance mode generated by the second group of resonance parts 1212 and the single-mode resonator 13, wherein the second coupling member 15 is grounded.

[0057] It should be noted that electric coupling is electric field coupling, also known as capacitive coupling; magnetic coupling is magnetic field coupling, also known as inductive coupling.

[0058] In other embodiments, both the first coupling member 14 and the second coupling member 15 are electrical coupling members. In this case, the first coupling member 14 is opposite to the single-mode resonator 13, and the first coupling member 14 is opposite to the first group of resonant parts 1211 in the first direction X, so as to realize electrical coupling between the resonant mode generated by the first group of resonant parts 1211 and the single-mode resonator 13; at the same time, the second coupling member 15 is opposite to the single-mode resonator 13, and the second coupling member 15 is opposite to the second group of resonant parts 1212 in the second direction Y, that is, the second coupling member 15 needs to extend to the position where the second group of resonant parts 1212 is located, so as to realize electrical coupling between the resonant mode generated by the second group of resonant parts 1212 and the single-mode resonator 13.

[0059] In other embodiments, the first coupling member 14 and the second coupling member 15 can both be magnetic coupling members, and the first coupling member 14 and the second coupling member 15 are both connected to the single-mode resonator 13 and grounded, wherein the extension directions of the first coupling member 14 and the second coupling member 15 can be arranged arbitrarily, as long as the coupling portion of the first coupling member 14 is parallel to the first direction X, and the coupling portion of the second coupling member 15 is parallel to the second direction Y.

[0060] Please also refer to Figure 2 and Figure 4 In some embodiments, a support wall 111 is provided in the cavity 11, and the first coupling member 14 is an electrical coupling member. The first coupling member 14 includes an insulating seat 141 and a metal member 142 provided on the insulating seat 141. The insulating seat 141 is fixed on the support wall 111, and one end of the metal member 142 is opposite to the single-mode resonator 13, and the other end of the metal member 142 is opposite to the first group of resonant parts 1211 in the first direction X.

[0061] It can be understood that the support wall 111 can be a metal wall to increase the support strength; the support wall 111 can be integrally formed with the bottom wall of the cavity 11, and the support wall 111 can also be fixed (can be but not limited to welding) on ​​the bottom wall of the cavity 11. Alternatively, the support wall 111 can be a non-metal wall, such as a plastic wall, a ceramic wall, etc., and the support wall 111 is bonded and fixed to the bottom wall of the cavity 11.

[0062] Optionally, the metal member 142 is fixed on the insulating seat 141, and the insulating seat 141 is fixed on the supporting wall 111. The insulating seat 141 separates the metal member 142 from the supporting wall 111 to prevent the metal member 142 from being grounded through the supporting wall 111 and the cavity 11. The insulating seat 141 can be made of plastic, for example, PTFE (Polytetrafluoroethylene).

[0063] There are many ways to fix the metal piece 142 on the insulating seat 141. For example, the insulating seat 141 is provided with a slot, and the metal piece 142 is fixed on the insulating seat 141 by snapping; or when the insulating seat 141 is cast, the metal piece 142 and the insulating seat 141 are directly molded together to fix the metal piece 142 on the insulating seat 141.

[0064] Optionally, the metal member 142 is a dumbbell-shaped structure. The metal member 142 includes a thin section in the middle and thick sections at both ends, and the thick sections at both ends are respectively opposite to the single-mode resonator 13 and the first group of resonant parts 1211. The thin section in the middle can be a straight section, a V-shaped section, etc.

[0065] In other embodiments, the metal member 142 is a U-shaped structure, and the metal member 142 includes a first section, a second section, and a connecting section. The first section and the second section are arranged in parallel or approximately in parallel. The connecting section connects the first section and the second section. The first section and the second section are respectively opposite to the single-mode resonator 13 and the first group of resonant parts 1211.

[0066] like Figure 3 and Figure 5 As shown, in some embodiments, the second coupling member 15 is a magnetic coupling member, and the second coupling member 15 includes a first protrusion 151, a connecting portion 153, a coupling portion 154 and a second protrusion 152 connected in sequence, the first protrusion 151 and the second protrusion 152 are both fixed to the bottom wall of the cavity 11, and the connecting portion 153 and the coupling portion 154 are both suspended; the first protrusion 151 is connected to the single-mode resonator 13, and the second protrusion 152 is arranged close to the multi-mode resonator 12; the coupling portion 154 is parallel to the second direction Y.

[0067] The first convex portion 151 and the second convex portion 152 may have various shapes, for example, they may be regular shapes such as cylinders and prisms, or they may be irregular shapes.

[0068] It can be understood that the first convex portion 151 and the second convex portion 152 can be integrally formed on the bottom wall of the cavity 11 , and the first convex portion 151 and the second convex portion 152 can also be fixed (can be but not limited to welded) on the bottom wall of the cavity 11 .

[0069] The first protrusion 151 may be directly connected to the single-mode resonator 13 , or the first protrusion 151 may be connected to the single-mode resonator 13 via a connecting section.

[0070] The connecting portion 153 and the coupling portion 154 are both suspended, which means that there is a certain distance between the two and the bottom wall of the cavity 11 .

[0071] There are many ways to connect the connecting portion 153 and the coupling portion 154 together. For example, the connecting portion 153 and the coupling portion 154 can be connected together as one piece; or, the connecting portion 153 and the coupling portion 154 can be fixedly connected together, which can be but is not limited to welding connection.

[0072] It can be understood that the connection portion 153 and the first protrusion 151 can be connected integrally; or, the connection portion 153 and the first protrusion 151 can be fixedly connected, for example, by welding, screw connection, riveting, clamping, plugging, etc.

[0073] It can be understood that the coupling portion 154 and the second convex portion 152 can be connected integrally; or the coupling portion 154 and the second convex portion 152 can be fixedly connected, for example, by welding, screw connection, riveting, clamping, plugging, etc. The coupling portion 154 is arranged corresponding to the first group of resonant portions 1211 and coupled to the second group of resonant portions 1212.

[0074] The second coupling member 15 is made of metal material.

[0075] In other embodiments, Figure 6 As shown, the second coupling member 15 is a metal coupling rib 17 disposed on the bottom wall of the cavity 11, one end of the metal coupling rib 17 is connected to the single-mode resonator 13, and the other end of the metal coupling rib 17 is provided with a coupling section 171, and the coupling section 171 is parallel to the second direction Y. In order to avoid interference between the support wall 111 and the metal coupling rib 17, a notch for avoiding the metal coupling rib 17 can be provided on the support wall 111.

[0076] Please also refer to Figure 3 and Figure 5 In some embodiments, the connecting portion 153 includes a first connecting segment 1531 and a second connecting segment 1532 connected to each other, and the second connecting segment 1532 is connected to the coupling portion 154; the first connecting segment 1531 extends along the arrangement direction of the single-mode resonator 13 and the dual-mode resonator, and the second connecting segment 1532 extends along the axial direction of the single-mode resonator 13.

[0077] It can be understood that the first connecting segment 1531 and the second connecting segment 1532 can be connected as a whole; the first connecting segment 1531 and the second connecting segment 1532 can also be fixedly connected, which can be but is not limited to welding connection.

[0078] The first convex portion 151, the first connecting segment 1531, the second connecting segment 1532, the coupling portion 154 and the second convex portion 152 are connected in sequence. Specifically, the first convex portion 151 is connected to the first end of the first connecting segment 1531, the second end of the first connecting segment 1531 is connected to the first end of the second connecting segment 1532, the second end of the second connecting segment 1532 is connected to the first end of the coupling portion 154, and the second end of the coupling portion 154 is connected to the second convex portion 152.

[0079] Optionally, the coupling portion 154 is parallel or approximately parallel to the bottom wall of the cavity 11 , and the extending direction of the coupling portion 154 is the same as the second direction Y.

[0080] The arrangement direction of the single-mode resonator 13 and the multi-mode resonator 12 is Figure 3 Direction indicated by the arrow.

[0081] The second end of the second connecting segment 1532 is connected to the first end of the coupling portion 154, and the second connecting segment 1532 extends along the axial direction of the single-mode resonator 13, that is, the second end of the second connecting segment 1532 is away from the bottom wall of the cavity 11, and the first end of the second connecting segment 1532 is close to the bottom wall of the cavity 11 to raise the coupling portion 154; the second end of the first connecting segment 1531 is connected to the first end of the second connecting segment 1532, and the first connecting segment 1531 extends along the arrangement direction of the single-mode resonator 13 and the dual-mode resonator, so that the first connecting segment 1531 is arranged parallel or approximately parallel to the bottom wall of the cavity 11, that is, the first connecting segment 1531 is relatively close to the bottom wall of the cavity 11 as a whole.

[0082] By adopting the above technical solution, while satisfying the coupling of the resonant mode generated by the coupling portion 154 and the second group of resonant portions 1212, the first connecting section 1531 can be made as a whole closer to the bottom wall of the cavity 11, and the first protrusion 151 will not be too high, which is beneficial to reducing the occupied space in the cavity 11; at the same time, the coupling portion 154 is raised by the second connecting section 1532, which can increase the coupling strength.

[0083] In other embodiments, the connection portion 153 only includes the first connection segment 1531, but does not include the second connection segment 1532; it can be understood that the first connection segment 1531 can be at the same height as the coupling portion 154, in which case the heights of the first convex portion 151 and the coupling portion 154 are substantially the same; or the first connection segment 1531 can be tilted, in which case the first convex portion 151 is lower than the coupling portion 154. The above two situations make the structure of the connection portion 153 relatively simple.

[0084] In some embodiments, the first coupling member 14 is an electric coupling member, and the second coupling member 15 is a magnetic coupling member; the single-mode resonator 13, the electric coupling member and the multi-mode resonator 12 are arranged in a straight line, and the single-mode resonator 13, the magnetic coupling member and the multi-mode resonator 12 are arranged in a straight line, and the magnetic coupling member is below the electric coupling member.

[0085] Optionally, see Figure 2 , Figure 3 and Figure 6 , the second coupling member 15 (magnetic coupling member) extends along the first direction X and extends to a position corresponding to the first group of resonant parts 1211, the first coupling member 14 (electric coupling member) is directly opposite to the first group of resonant parts 1211 in the first direction X, and the magnetic coupling member is below the electric coupling member. Therefore, in the first direction X, the first coupling member 14 (electric coupling member) and the second coupling member 15 (magnetic coupling member) can share the same space, and in a direction perpendicular to the first direction X and perpendicular to the second direction Y, the projections of the first coupling member 14 (electric coupling member) and the second coupling member 15 (magnetic coupling member) have an overlapping part. Based on this, the internal space utilization of the cavity 11 can be improved and the structure can be simplified.

[0086] By adopting the above technical solution, the overall layout of the single-mode resonator 13, the electric coupling component, the magnetic coupling component and the multi-mode resonator 12 is relatively compact.

[0087] In some embodiments, the single-mode resonator 13 is a dielectric resonator; or, the single-mode resonator 13 is a dielectric-loaded metal resonator.

[0088] Optionally, the single-mode resonator 13 may be a TM mode resonator or a TE mode resonator.

[0089] Compared with metal resonators, dielectric resonators can reduce the insertion loss of the filter 10 and improve the power handling capacity of the filter 10 .

[0090] Please refer to Figure 2 In some embodiments, the dual-mode resonator is a cylindrical structure, and the resonating portion 121 includes a resonating hole.

[0091] The resonance hole extends along the axial direction of the dual-mode resonator. It can be understood that the resonance hole can be a through hole or a blind hole.

[0092] Optionally, the dual-mode resonator includes a first group of resonating parts 1211 and a second group of resonating parts 1212, wherein the first group of resonating parts 1211 includes two resonating holes, and the second group of resonating parts 1212 includes two resonating holes. All the resonating holes are arranged at intervals along the circumferential direction of the dual-mode resonator, the two resonating holes of the first group of resonating parts 1211 are arranged along the first direction X, and the two resonating holes of the second group of resonating parts 1212 are arranged along the second direction, that is, the arrangement direction of the two resonating holes of the first group of resonating parts 1211 is perpendicular to the arrangement direction of the two resonating holes of the second group of resonating parts 1212.

[0093] Of course, in other embodiments, the first group of resonant parts 1211 may include a resonant hole, the second group of resonant parts 1212 may include a resonant hole, the connection direction between the resonant holes of the first group of resonant parts 1211 and the center of the dual-mode resonator is the first direction X, and the connection direction between the resonant holes of the second group of resonant parts 1212 and the center of the dual-mode resonator is the first direction Y.

[0094] Optionally, the first coupling member 14 is an electrical coupling member, and the first coupling member 14 is located between the outer peripheral surfaces of the single-mode resonator 13 and the dual-mode resonator; the second coupling member 15 is a magnetic coupling member, and the portion of the second coupling member 15 close to the dual-mode resonator is located below the resonance hole of the first group of resonance parts 1211.

[0095] Designing the dual-mode resonator into a cylindrical structure is beneficial to the processing of the dual-mode resonator.

[0096] In other embodiments, the dual-mode resonator may be a cross-shaped structure.

[0097] Please refer to Figure 2 In some embodiments, a fixing hole 122 is provided on the dual-mode resonator, and a mounting column 112 for mounting the dual-mode resonator is provided on the bottom wall of the cavity 11 .

[0098] Optionally, the fixing hole 122 is located in the middle of the dual-mode resonator, and all the resonance holes are arranged around the fixing hole 122 .

[0099] Specifically, the dual-mode resonator is a cylindrical structure, the fixing hole 122 is a through hole that penetrates the dual-mode resonator along the axial direction, the mounting column 112 is processed with a threaded hole, and the dual-mode resonator is fixed to the mounting column 112 by a threaded fastener, and the threaded fastener can be a bolt, a screw, etc.

[0100] It can be understood that the mounting post 112 can be integrally formed with the bottom wall of the cavity 11 , and the mounting post 112 can also be fixed (can be but not limited to welding) on ​​the bottom wall of the cavity 11 .

[0101] The dual-mode resonator is fixed to the mounting post 112 by means of threaded fasteners, which facilitates the installation and removal of the dual-mode resonator on the mounting post 112 .

[0102] In other embodiments, the dual-mode resonator may be welded and fixed on the mounting post 112 , or the dual-mode resonator may be integrally formed with the mounting post 112 .

[0103] Please also refer to Figure 1 and Figure 2 In some embodiments, the number of the single-mode resonators 13 is multiple, and at least two single-mode resonators 13 are coupled to the multi-mode resonator 12 .

[0104] Optionally, the multi-mode resonator 12 is a dual-mode resonator, and the dual-mode resonator is coupled with two single-mode resonators 13 at the same time. It can be understood that the two single-mode resonators 13 can be symmetrically arranged on both sides of the dual-mode resonator, and the central angles of the two single-mode resonators 13 on the dual-mode resonator are 180° or close to 180°, that is, the two single-mode resonators 13 are arranged corresponding to the first group of resonance parts 1211; or, the central angles of the two single-mode resonators 13 on the dual-mode resonator are 90° or close to 90°, that is, one of the single-mode resonators 13 is arranged corresponding to the first group of resonance parts 1211, and the other single-mode resonator 13 is arranged corresponding to the second group of resonance parts 1212.

[0105] In other embodiments, the multi-mode resonator 12 may be coupled to one single-mode resonator 13 .

[0106] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A filter, characterized in that: It includes a cavity, a multi-mode resonator, a single-mode resonator and a plurality of coupling components. The multi-mode resonator, the single-mode resonator and the plurality of coupling components are all arranged in the cavity. The multi-mode resonator includes a plurality of groups of resonance parts. The plurality of coupling components are used to achieve coupling of the resonance modes generated by at least two groups of the resonance parts with the single-mode resonator.

2. The filter according to claim 1, characterized in that: The multi-mode resonator is a dual-mode resonator, the dual-mode resonator includes a first group of resonating parts and a second group of resonating parts, the connection direction of the first group of resonating parts and the center point of the dual-mode resonator is a first direction, the connection direction of the second group of resonating parts and the center point of the dual-mode resonator is a second direction, and the first direction is perpendicular to the second direction; The plurality of coupling members include a first coupling member and a second coupling member, wherein the first coupling member is used to couple the resonance mode generated by the first group of resonance parts with the single-mode resonator, and the second coupling member is used to couple the resonance mode generated by the second group of resonance parts with the single-mode resonator.

3. The filter according to claim 2, characterized in that: A support wall is provided in the cavity, the first coupling member is an electrical coupling member, the first coupling member includes an insulating seat and a metal member provided on the insulating seat, the insulating seat is fixed on the support wall, one end of the metal member is opposite to the single-mode resonator, and the other end of the metal member is opposite to the first group of resonant parts in the first direction.

4. The filter according to claim 2, characterized in that: The second coupling member is a magnetic coupling member, and the second coupling member includes a first protrusion, a connecting portion, a coupling portion, and a second protrusion connected in sequence, the first protrusion and the second protrusion are both fixed to the bottom wall of the cavity, and the connecting portion and the coupling portion are both suspended; the first protrusion is connected to the single-mode resonator, and the second protrusion is arranged close to the multi-mode resonator; the coupling portion is parallel to the second direction.

5. The filter according to claim 4, characterized in that: The connecting portion includes a first connecting segment and a second connecting segment connected to each other, the second connecting segment is connected to the coupling portion; the first connecting segment extends along the arrangement direction of the single-mode resonator and the dual-mode resonator, and the second connecting segment extends along the axial direction of the single-mode resonator.

6. The filter according to claim 2, characterized in that: The first coupling member is an electric coupling member for realizing electric coupling between the resonance mode generated by the first group of resonance parts and the single-mode resonator, and the second coupling member is a magnetic coupling member for realizing magnetic coupling between the resonance mode generated by the second group of resonance parts and the single-mode resonator.

7. The filter according to claim 6, characterized in that: The single-mode resonator, the electric coupling element and the multi-mode resonator are arranged in a straight line, and the single-mode resonator, the magnetic coupling element and the multi-mode resonator are arranged in a straight line, and the magnetic coupling element is located below the electric coupling element.

8. The filter according to any one of claims 1 to 7, characterized in that: The single-mode resonator is a dielectric resonator; or, the single-mode resonator is a metal resonator loaded with a dielectric.

9. The filter according to any one of claims 2 to 7, characterized in that: The dual-mode resonator is a cylindrical structure, and the resonating part includes a resonating hole.

10. The filter according to any one of claims 1 to 7, characterized in that: There are multiple single-mode resonators, and at least two of the single-mode resonators are coupled to the multi-mode resonator.

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