Multi-mode resonator and filter

Abstract

This application relates to the field of communications and provides a multimode resonator and filter. The multimode resonator includes a resonator housing, a dielectric resonator, and a first coupling structure. The first coupling structure is disposed on one end of the dielectric resonator and includes a first coupling portion and a second coupling portion. The first coupling portion extends along a first radial direction, and one end of the second coupling portion is connected to the end of the first coupling portion away from the central axis of the dielectric resonator. The second coupling portion extends circumferentially along the dielectric resonator. Two first coupling structures are provided, and the second coupling portions of the two first coupling structures are both disposed on the same side of the first coupling portion. Thus, the coupling between the HE mode and the TE mode along the first radial direction of the electric field polarization direction can be enhanced through the two first coupling structures, optimizing the coupling strength and coupling effect, and reducing or even eliminating the additional parasitic coupling generated when there is only one first coupling structure, thereby optimizing the performance indicators of the multimode resonator.

Description

Technical Field

[0001] This application belongs to the field of communication technology, and in particular relates to a multimode resonator and filter. Background Technology

[0002] In some cases, multimode resonators have at least three resonance modes: HE mode and TE mode. A PCB board is placed on the upper surface of a dielectric cylinder, and the PCB board has coupling circuitry for coupling the HE and TE modes. However, while coupling the HE and TE modes, the coupling circuitry also generates parasitic coupling, affecting the performance of the multimode resonator. Summary of the Invention

[0003] This application provides a multimode resonator designed to address the problem that parasitic coupling is generated when the coupling circuit couples the HE mode and TE mode, thus affecting the performance of the multimode resonator.

[0004] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0005] Firstly, a multimode resonator is provided, the multimode resonator having at least three resonance modes: HE mode and TE mode, the multimode resonator comprising:

[0006] Resonator housing;

[0007] A dielectric resonator is disposed inside the resonator housing and connected to the first wall of the resonator housing; the two electric field polarization directions of the HE mode are respectively along a first radial direction and a second radial direction, and the first radial direction and the second radial direction intersect perpendicularly at the central axis of the dielectric resonator;

[0008] A first coupling structure is disposed on the end side of the dielectric resonator. The first coupling structure includes a first coupling part and a second coupling part. The first coupling part extends along the first radial direction. One end of the second coupling part is connected to the end of the first coupling part away from the central axis of the dielectric resonator. The second coupling part extends along the circumferential direction of the dielectric resonator. There are two first coupling structures. The second coupling parts of the two first coupling structures are disposed on the same side of the first coupling part.

[0009] In some embodiments, the two first coupling structures are arranged symmetrically about the second radial direction.

[0010] In some embodiments, the first coupling structure changes its coupling polarity by switching the second coupling portion to different sides of the first coupling portion.

[0011] In some embodiments, the first coupling structure is metallized on the end face of the dielectric resonator.

[0012] In some embodiments, the multimode resonator further includes a second coupling structure disposed on the end side of the dielectric resonator. The second coupling structure includes a third coupling portion and a fourth coupling portion. The third coupling portion extends along the second radial direction, and one end of the fourth coupling portion is connected to the end of the third coupling portion away from the central axis of the dielectric resonator. The fourth coupling portion extends along the circumferential direction of the dielectric resonator.

[0013] The second coupling structure is provided in two parts, and the fourth coupling part of the two second coupling structures is provided on the same side of the third coupling part.

[0014] In some embodiments, the two second coupling structures are arranged symmetrically about the first radial direction;

[0015] And / or, the second coupling structure changes the coupling polarity it achieves by switching the fourth coupling portion to different sides of the third coupling portion;

[0016] And / or, the second coupling structure is metallized on the end face of the dielectric resonator;

[0017] And / or, the first coupling structure and the second coupling structure are located on the same end side of the dielectric resonator.

[0018] In some embodiments, the dielectric resonator has a first opening structure in the first radial direction and a second opening structure in the second radial direction. The first opening structure includes at least one first opening, and the second opening structure includes at least one second opening. The first opening structure and the second opening structure are non-rotationally symmetric along the central axis of the dielectric resonator, so that the two electric field polarization directions of the HE mode are along the first radial direction and the second radial direction, respectively.

[0019] In some embodiments, when there is one first opening, the distance between the first opening and the central axis of the dielectric resonator along the first radial direction is a first distance; when there are multiple first openings, the distance between the two farthest first openings along the first radial direction is the first distance.

[0020] When there is one second opening, the distance between the second opening and the central axis of the dielectric resonator along the second radial direction is the second distance; when there are multiple second openings, the distance between the two second openings that are furthest apart along the second radial direction is the second distance.

[0021] The first distance is not equal to the second distance.

[0022] In some embodiments, the first opening is formed on the end face of the dielectric resonator and is located between the outer peripheral surface of the dielectric resonator and the central axis of the dielectric resonator.

[0023] The second opening is formed on the end face of the dielectric resonator and is located between the outer peripheral surface of the dielectric resonator and the central axis of the dielectric resonator.

[0024] In some embodiments, the first coupling structure includes a fifth coupling portion extending along the periphery of the first opening, the fifth coupling portion being connected between the first coupling portion and the second coupling portion.

[0025] In some embodiments, the multimode resonator includes a first adjustment plate, which is disposed at the intersection of the first coupling portion and the second coupling portion of the first coupling structure.

[0026] In some embodiments, the multimode resonator includes a first adjustment piece, which is erected at the intersection of the first coupling portion and the second coupling portion of the first coupling structure; in the case where the intersection of the first coupling portion and the second coupling portion of the first coupling structure falls into the first opening, at least a portion of the first adjustment piece is inserted into the first opening.

[0027] In some embodiments, the multimode resonator includes a third coupling structure disposed at one end of the dielectric resonator and perpendicularly intersecting the central axis of the dielectric resonator. The third coupling structure is arranged at an angle to the first radial direction and at an angle to the second radial direction to enable HE dual-mode coupling.

[0028] In some embodiments, the third coupling structure is a rib, and the third coupling structure is disposed between the dielectric resonator and the first wall.

[0029] In some embodiments, the third coupling structure is metallized on the end face of the dielectric resonator.

[0030] In some embodiments, the third coupling structure forms a 45° angle with the first radial direction and a 45° angle with the second radial direction.

[0031] In some embodiments, the third coupling structure changes the coupling polarity between the HE dual modes by rotating 90° about the central axis of the dielectric resonator.

[0032] In some embodiments, the multimode resonator includes a coupling adjustment screw threaded to the resonator housing and disposed in the extension direction of the third coupling structure.

[0033] In some embodiments, the dielectric resonator includes a dielectric body and a dielectric cylinder, wherein the dielectric cylinder is erected on one end of the dielectric body and surrounds the periphery of the dielectric body.

[0034] In some embodiments, the multimode resonator includes a metal disk and an insulating element. The metal disk is connected to a second wall of the resonator housing via the insulating element. The second wall is disposed opposite to the first wall. The metal disk and the dielectric resonator are disposed opposite to each other along the axial direction of the dielectric resonator. The distance between the metal disk and the dielectric resonator is adjustable to adjust the resonant frequency of the TE mode.

[0035] In some embodiments, the multimode resonator includes a ceramic base, which is separately connected between the dielectric resonator and the first wall.

[0036] In some embodiments, the multimode resonator includes a first tuning screw, which is threaded to the resonator housing and disposed in the first radial direction;

[0037] And / or, the multimode resonator includes a second tuning screw, which is threaded to the resonator housing and disposed in the second radial direction.

[0038] Secondly, a filter is provided, including the multimode resonator provided in the embodiments of this application.

[0039] The advantages of the multimode resonator provided in this application are as follows:

[0040] The multimode resonator provided in this application embodiment has at least three resonant modes: HE mode and TE mode. When the two electric field polarization directions of the HE mode are respectively along the first radial direction and the second radial direction, the HE mode with the electric field polarization direction along the first radial direction can be coupled through the first coupling part of the first coupling structure, and the TE mode can be coupled through the second coupling part of the first coupling structure, so that the HE mode with the electric field polarization direction along the first radial direction and the TE mode can be coupled on the first coupling structure. Furthermore, by setting two first coupling structures and uniformly placing the second coupling part of each first coupling structure on the same side of its first coupling part, the current direction obtained by the coupling electric field energy of the two first coupling structures is the same, and a circulating current loop can be formed along the path of "first coupling part of the first first coupling structure, second coupling part of the first first coupling structure, second coupling part of the second first coupling structure, first coupling part of the second first coupling structure, and first coupling part of the first first coupling structure". This allows both first coupling structures to couple the HE mode and TE mode along the first radial direction of the electric field polarization. The coupling polarity of the two first coupling structures is the same, and the coupling effects of the two first coupling structures are superimposed rather than canceled out. This reduces or even eliminates the parasitic coupling that occurs when only one first coupling structure is used. Therefore, through the two first coupling structures, the coupling of the HE mode and TE mode along the first radial direction of the electric field polarization can be enhanced, optimizing the coupling strength and coupling effect, and reducing parasitic coupling, thereby optimizing the performance indicators of the multimode resonator. Attached Figure Description

[0041] To clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments 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.

[0042] Figure 1 A three-dimensional schematic diagram of a multimode resonator provided for some embodiments of this application;

[0043] Figure 2 for Figure 1 A partial structural schematic diagram of the provided multimode resonator;

[0044] Figure 3 for Figure 2 A partial structural schematic diagram of the provided multimode resonator;

[0045] Figure 4 for Figure 3 A bottom view of the provided multimode resonator;

[0046] Figure 5 for Figure 1 HE of the provided multimode resonator ∥ Electric field distribution diagram of the model;

[0047] Figure 6 for Figure 1 HE of the provided multimode resonator ⊥ Electric field distribution diagram of the model;

[0048] Figure 7 for Figure 1 The electric field distribution diagram of the TE mode of the provided multimode resonator;

[0049] Figure 8 A bottom view of a multimode resonator provided for other embodiments of this application, wherein, with Figure 4 In contrast, the first coupling structure has its second coupling part switched to be located on the other side of the first coupling part, and the second coupling structure has its fourth coupling part switched to be located on the other side of the third coupling part;

[0050] Figure 9 for Figure 2 A three-dimensional sectional view of the provided dielectric resonator;

[0051] Figure 10 The following is a perspective view of a dielectric resonator provided in some other embodiments of this application, wherein a first opening and a second opening are formed on the outer peripheral surface of the dielectric resonator and connected to at least one end face of the dielectric resonator;

[0052] Figure 11 The following is a perspective view of a dielectric resonator provided in some other embodiments of this application, wherein the first opening and the second opening are formed on the outer peripheral surface of the dielectric resonator and are disposed between the two end faces of the dielectric resonator;

[0053] Figure 12 A bottom view of a multimode resonator provided for other embodiments of this application, wherein, with Figure 4 In contrast, the third coupling structure changes the coupling polarity between the HE dual modes by rotating 90° around the central axis of the dielectric resonator;

[0054] Figure 13 The following is a bottom view of a multimode resonator provided in some other embodiments of this application, wherein the multimode resonator includes a coupling adjustment screw that is threaded to the resonator housing and is disposed in the extension direction of the third coupling structure;

[0055] Figure 14 for Figure 1 The provided simulation results for the frequency and Q value of the multimode resonator are shown in the figure. Mode 1 represents HE. ∥ Mode 2 represents HE ⊥Mode 3 represents the TE mode, while Mode 4, Mode 5, and Mode 6 are modes outside the passband range;

[0056] Figure 15 Schematic diagram of the filter results provided in some embodiments of this application;

[0057] Figure 16 for Figure 15 The provided topology diagram of the filter is shown, where 1-HE ⊥ HE characterizing the first multimode resonator ⊥ Mode, 1-TE characterizes the TE mode of the first multimode resonator, 1-HE ∥ HE characterizing the first multimode resonator ∥ Mold, 2-HE ⊥ HE characterizing the second multimode resonator ⊥ The TE mode of the second multimode resonator is represented by 2-TE, and the HE mode by 2-HE is represented by 2-HE. ∥ HE characterizing the second multimode resonator ∥ mold;

[0058] Figure 17 for Figure 15 The provided simulation waveform diagram of the filter.

[0059] The following are the labeling elements in the figure:

[0060] 1-Multimode resonator, 2-Coupled window, 3-Metal fly rod; 10-Resonator housing, 11-First wall, 12-Second wall, 13-Side wall; 20-Dielectric resonator, 21-First opening structure, 211-First opening, 22-Second opening structure, 221-Second opening, 23-Dielectric body, 24-Dielectric cylinder; 30-First coupling structure, 31-First coupling part, 32-Second coupling part, 33-Fifth coupling part, 40-Second coupling structure, 41-Third coupling part, 42-Fourth coupling part, 43-Sixth coupling part, 50-First adjusting plate, 60-Second adjusting plate; 70-Third coupling structure; 80-Metal disk, 90-Ceramic base, 100-First tuning screw, 110-Second tuning screw, 120-Coupled adjusting screw; x-First radial direction, y-Second radial direction, L-Central axis of dielectric resonator, d1-First distance, d2-Second distance. Detailed Implementation

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] In this application, "central axis" refers to a line that passes through the geometric center of the corresponding structure.

[0066] In this application, "axial" refers to the direction of extension of the central axis of the corresponding structure, "radial" refers to any direction of the corresponding structure that passes through and is perpendicular to the central axis, and "circumferential" refers to the direction of circumference of the outer circumference of the corresponding structure.

[0067] A multimode resonator is a resonator capable of simultaneously generating multiple stable oscillation signals at various frequencies. Multimode resonators can be two-mode, three-mode, four-mode, etc. Within their passband, multimode resonators support multiple resonance modes. These modes can include HE (Hybrid Electromagnetic Mode), TE (Transverse Electric Field) mode, TM (Transverse Magnetic Field) mode, TEM (Transverse Electric and Magnetic Field) mode, and so on. For example, a HE two-mode resonator supports two HE modes within its passband; a HE-TE three-mode resonator supports both HE and TE modes; a HE-TM three-mode resonator supports both HE and TM modes; and a HE-TE-TM four-mode resonator supports all four modes (HE, TE, and TM) within its passband.

[0068] In some cases, multimode resonators have at least three resonance modes: HE mode and TE mode. A PCB (Printed Circuit Board) is placed on the upper surface of a dielectric cylinder, and the PCB has coupling circuits for coupling the HE and TE modes. However, while coupling the HE and TE modes, the coupling circuits also generate parasitic coupling, affecting the performance of the multimode resonator.

[0069] The embodiments provided in this application will solve the above problems.

[0070] The specific implementation of this application will be described in detail below with reference to specific embodiments:

[0071] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4Some embodiments of this application provide a multimode resonator 1, which has at least three resonance modes: HE mode and TE mode. The multimode resonator 1 includes a resonator housing 10, a dielectric resonator 20, and a first coupling structure 30. The dielectric resonator 20 is disposed within the resonator housing 10 and connected to the first wall 11 of the resonator housing 10. The two electric field polarization directions of the HE mode are along a first radial direction x and a second radial direction y, respectively, and the first radial direction x and the second radial direction y intersect perpendicularly at the central axis L of the dielectric resonator 20. The first coupling structure 30 is disposed on the end side of the dielectric resonator 20 and includes a first coupling portion 31 and a second coupling portion 32. The first coupling portion 31 extends along the first radial direction x, and one end of the second coupling portion 32 is connected to the end of the first coupling portion 31 away from the central axis L of the dielectric resonator 20. The second coupling portion 32 extends circumferentially along the dielectric resonator 20. Two first coupling structures 30 are provided, and the second coupling portions 32 of both first coupling structures 30 are disposed on the same side of the first coupling portion 31.

[0072] It should be noted that the multimode resonator 1 has at least three resonance modes: HE mode and TE mode. That is, the multimode resonator 1 can support at least HE mode and TE mode within its passband. For example, the multimode resonator 1 can be an HE-TE three-mode resonator, an HE-TE-TM four-mode resonator, etc.

[0073] It should also be noted that the multimode resonator 1 includes a resonator housing 10 and a dielectric resonator 20. The resonator housing 10 has a resonant cavity inside, which can be, but is not limited to, a rectangular resonant cavity, a square resonant cavity, a polygonal cylindrical resonant cavity, a cylindrical resonant cavity, etc. The dielectric resonator 20 can be accommodated within the resonant cavity. Optionally, the dielectric resonator 20 can be centrally arranged within the resonant cavity. The resonator housing 10 can provide shielding to prevent signal leakage.

[0074] One of the walls of the resonator housing 10 is the first wall 11. In practical applications, the first wall 11 of the resonator housing 10 can be the wall located on the lower side, or it can be any wall located on the upper side, left side, right side, front side, or rear side. In addition, the shape, size, material, etc. of the resonator housing 10 can be flexibly set as needed.

[0075] The dielectric resonator 20 is a resonator made of dielectric material. The dielectric resonator 20 can be a ceramic dielectric resonator or a dielectric resonator made of other materials. One end of the dielectric resonator 20 along its axial direction is connected to the first wall 11. The dielectric resonator 20 can be directly connected and fixed to the first wall 11 by, but not limited to, welding, bonding, riveting, pressing, plugging, screw fastening, threaded connection, snap-fitting, etc., or it can be indirectly connected and fixed to the first wall 11 by other structures connected to it (such as a ceramic base 90, a base platform, coupling ribs, etc.). The dielectric resonator 20 can be, but not limited to, columnar, block-shaped, rod-shaped, etc. The cross-sectional shape of the dielectric resonator 20 perpendicular to its axial direction can be, but not limited to, circular, rectangular, square, polygonal, petal-shaped, cross-shaped, etc. The cross-sectional shape of the dielectric resonator 20 parallel to its axial direction can also be, but not limited to, circular, rectangular, square, polygonal, petal-shaped, cross-shaped, etc. A central hole can be provided at the central axis L of the dielectric resonator 20, or it can be without a central hole.

[0076] The dielectric resonator 20 has two end faces along its own axial direction. The outer peripheral surface of the dielectric resonator 20 refers to the peripheral surface connected to the two end faces of the dielectric resonator 20. The first radial direction x and the second radial direction y are two radial directions of the dielectric resonator 20. The first radial direction x and the second radial direction y intersect perpendicularly, and both the first radial direction x and the second radial direction y intersect perpendicularly with the central axis L of the dielectric resonator 20.

[0077] The two electric field polarization directions of the HE mode are along the first radial direction x and the second radial direction y, respectively. For example, HE... ∥ The electric field polarization direction of the mode is along the first radial x (e.g., Figure 5 shown), HE ⊥ The electric field polarization direction of the mode is along the second radial direction y (e.g., Figure 6 shown), HE ∥ The electric field polarization direction of the mode, HE ⊥ The electric field polarization direction of the mode is the same as the two electric field polarization directions of the HE mode.

[0078] like Figure 7 As shown, the electric field polarization direction of the TE mode is along the circumference of the dielectric resonator 20.

[0079] It should also be noted that the first coupling structure 30 is disposed on the end side of the dielectric resonator 20, that is, the first coupling structure 30 can be disposed on the end side of the dielectric resonator 20 facing the first wall 11, or it can be disposed on the end side of the dielectric resonator 20 away from the first wall 11. The first coupling structure 30 can abut against the end face of the dielectric resonator 20, or it can be spaced apart from the end face of the dielectric resonator 20.

[0080] The first coupling structure 30 includes a first coupling portion 31 and a second coupling portion 32. The first coupling portion 31 extends along a first radial direction x to couple an HE mode (e.g., HE) whose electric field polarization direction is along the first radial direction x.∥ The electric field energy of the TE mode is coupled to the first coupling part 31. The second coupling part 32 extends circumferentially along the dielectric resonator 20 to couple the electric field energy of the TE mode whose electric field polarization direction is along the circumference of the dielectric resonator 20. Since the electric field energy of the TE mode is stronger near the outer peripheral surface of the dielectric resonator 20, to facilitate the coupling of more and stronger TE mode electric field energy by the second coupling part 32, one end of the second coupling part 32 is connected to the end of the first coupling part 31 away from the central axis L of the dielectric resonator 20 (i.e., the end of the first coupling part 31 close to the outer peripheral surface of the dielectric resonator 20). The second coupling part 32 and the first coupling part 31 can be directly connected, or indirectly connected via other parts (e.g., the fifth coupling part 33 described below). The first coupling part 31 couples the HE mode (e.g., HE mode) whose electric field polarization direction is along the first radial direction x. ∥ The second coupling part 32 couples the TE mode, and the second coupling part 32 is sequentially connected to the first coupling part 31. The electric field polarization direction is along the first radial x of the HE mode (e.g., HE). ∥ The TE module and the TE module can be coupled on the first coupling structure 30.

[0081] The two opposite ends of the first coupling part 31 may be located on the same side of the central axis L of the dielectric resonator 20, or they may be located on opposite sides of the central axis L of the dielectric resonator 20, or one end may be located on the central axis L of the dielectric resonator 20.

[0082] In this configuration, the two first coupling portions 31 of the two first coupling structures 30 can be respectively disposed on both sides of the central axis L of the dielectric resonator 20; alternatively, the two opposite ends of the first coupling portion 31 of one of the first coupling structures 30 can be disposed on opposite sides of the central axis L of the dielectric resonator 20, while the two opposite ends of the first coupling portion 31 of the other first coupling structure 30 can be disposed on the same side of the central axis L of the dielectric resonator 20. That is, in this case, based on the fact that the two first coupling portions 31 of the two first coupling structures 30 are both extended along the first radial x, the first coupling portion 31 of one of the first coupling structures 30 passes through the central axis L of the dielectric resonator 20, while the first coupling portion 31 of the other first coupling structure 30 does not pass through the central axis L of the dielectric resonator 20.

[0083] In order to enable the current obtained by the coupling electric field energy of the two first coupling structures 30 to form a circulating current loop, the two second coupling parts 32 of the two first coupling structures 30 should be located on opposite sides of the central axis L of the dielectric resonator 20.

[0084] Specifically, the end of the first coupling portion 31 furthest from the central axis L of the dielectric resonator 20 cannot be connected to a non-end portion (e.g., the middle portion) of the second coupling portion 32. This causes the first coupling structure 30 to form a T-shaped structure, resulting in the two parts of the second coupling portion 32 located on either side of the first coupling portion 31 mutually canceling the coupling effect on the TE mode. Similarly, one end of the second coupling portion 32 cannot be connected to a non-end portion (e.g., the middle portion) of the first coupling portion 31, which also causes the first coupling structure 30 to form a T-shaped structure. This causes the two parts of the first coupling portion 31 located on either side of the second coupling portion 32 to mutually cancel the coupling effect on the HE mode (e.g., HE mode) along the first radial direction x. ∥ The coupling effect of the module. That is, the first coupling part 31 and the second coupling part 32 need to be connected in sequence in an L-shape, an I-shape, or a sickle shape, etc.

[0085] Specifically, the size of the first coupling part 31 can be adjusted to adjust the relationship between the first coupling part 31 and the HE mode (e.g., HE) along the first radial x direction of the electric field polarization direction. ∥ The coupling strength and coupling effect of the first coupling part 31 are determined. The dimensions of the first coupling part 31 include its length, width, and thickness. The length of the first coupling part 31 is its dimension along the first radial direction x, the thickness of the first coupling part 31 is its dimension along the axial direction of the dielectric resonator 20, and the width of the first coupling part 31 is its dimension in the direction perpendicular to its length and thickness directions. The larger the size of the first coupling part 31 (i.e., the larger any of its length, width, and thickness), the stronger the coupling strength and coupling effect between the first coupling part 31 and the HE mode (e.g., HE) with the electric field polarization direction along the first radial direction x. ∥ The stronger the coupling strength of the modules, the better the coupling effect.

[0086] The coupling strength and coupling effect between the second coupling part 32 and the TE mode can be adjusted by adjusting the dimensions of the second coupling part 32. The dimensions of the second coupling part 32 include its length, width, and thickness. The length of the second coupling part 32 is its circumferential dimension along the dielectric resonator 20; the thickness of the second coupling part 32 is its axial dimension along the dielectric resonator 20; and the width of the second coupling part 32 is its dimension in the direction perpendicular to its length and thickness directions. The larger the dimensions of the second coupling part 32 (i.e., the larger any one of its length, width, and thickness), the stronger the coupling strength and the better the coupling effect between the second coupling part 32 and the TE mode.

[0087] The coupling strength and coupling effect between the second coupling part 32 and the TE mode can be adjusted by changing the radius of the circle in which the second coupling part 32 is located. Since the electric field energy of the TE mode is stronger near the outer peripheral surface of the dielectric resonator 20, the larger the radius of the circle in which the second coupling part 32 is located, the stronger the coupling strength and the better the coupling effect between the second coupling part 32 and the TE mode.

[0088] The coupling strength and effect between the first coupling structure 30 and the HE and TE modes can be adjusted by changing the distance between the first coupling structure 30 and the dielectric resonator 20 along the axial direction of the dielectric resonator 20. Specifically, the smaller the distance between the first coupling structure 30 and the dielectric resonator 20 along the axial direction of the dielectric resonator 20, the stronger the coupling strength and the better the coupling effect between the first coupling structure 30 and the HE and TE modes. Therefore, when the first coupling structure 30 abuts against the end face of the dielectric resonator 20, the coupling strength between the first coupling structure 30 and the HE and TE modes is relatively strong and the coupling effect is relatively good.

[0089] The first coupling structure 30 may be made of a metallic material, or it may be made by covering the surface of an insulating structure with a metallic material. The metallic material used in the first coupling structure 30 may be, but is not limited to, silver, copper, gold, nickel, alloys, etc.

[0090] The first coupling structure 30 can be formed independently relative to the dielectric resonator 20, or it can be integrally connected to the end face of the dielectric resonator 20, or it can be separately connected to the end face of the dielectric resonator 20, or it can be supported on the wall of the resonator housing 10 (e.g., the first wall 11 or the second wall 12). When the first coupling structure 30 is supported on the wall of the resonator housing 10 (e.g., the first wall 11 or the second wall 12), the first coupling structure 30 can abut against the end face of the dielectric resonator 20, or it can be spaced apart from the end face of the dielectric resonator 20.

[0091] It should also be noted that, in this embodiment, there are two first coupling structures 30. The specific construction (e.g., the location and size of the first coupling part 31, the location and size of the second coupling part 32, whether the first coupling part 31 and the second coupling part 32 are directly connected or indirectly connected via the fifth coupling part 33, etc.), and shape of the two first coupling structures 30 can be the same or different. The two first coupling structures 30 can be arranged symmetrically or asymmetrically.

[0092] Based on the premise that "one end of the second coupling portion 32 is connected to the end of the first coupling portion 31 away from the central axis L of the dielectric resonator 20", the second coupling portion 32 may be located on either side of the first coupling portion 31. In the case where there are two first coupling structures 30, the second coupling portion 32 of each first coupling structure 30 is uniformly located on the same side of its first coupling portion 31. For example, such as... Figure 4 As shown, the second coupling portions 32 of the two first coupling structures 30 are uniformly disposed on the upper side of their first coupling portions 31; conversely, as Figure 8 As shown, the second coupling parts 32 of the two first coupling structures 30 are uniformly located on the lower side of their first coupling parts 31.

[0093] Based on this, the current directions obtained by the coupled electric field energy of the two first coupling structures 30 are the same, and a circulating current loop can be formed along the path of "first coupling part 31 of the first first coupling structure 30, second coupling part 32 of the first first coupling structure 30, second coupling part 32 of the second first coupling structure 30, first coupling part 31 of the second first coupling structure 30, and first coupling part 31 of the first first coupling structure 30". This allows both first coupling structures 30 to enable the electric field polarization direction to be along the HE mode (e.g., HE) in the first radial x direction. ∥ The first coupling structure 30 and the TE coupling structure 30 are coupled to each other, so that the coupling polarity of the two first coupling structures 30 is the same. The coupling effects of the two first coupling structures 30 are superimposed and will not cancel each other out. The parasitic coupling generated when there is only one first coupling structure 30 can be weakened or even eliminated.

[0094] The first coupling portions 31 of the two first coupling structures 30 can be disconnected, spaced apart, or connected together. These two first coupling portions 31 will not cancel each other out the HE mode (e.g., HE) along the first radial x direction of the electric field polarization direction. ∥ The coupling effect of the module.

[0095] It should be further noted that if only one first coupling structure 30 is provided, this first coupling structure 30 will cause the electric field polarization direction to be along the first radial x in the HE mode (e.g., HE). ∥While the first coupling structure 30 is coupled to the TE mode, it also generates a significant amount of parasitic coupling. If there are two first coupling structures 30, but one of the first coupling structures 30 has its second coupling part 32 located on one side (e.g., the upper side) of its first coupling part 31, and the other has its second coupling part 32 located on the other side (e.g., the lower side) of its first coupling part 31, then the coupling polarities of the two first coupling structures 30 will be opposite. This will cause the two first coupling structures 30 to cancel each other out, and will also generate a significant amount of parasitic coupling. This results in a complex and redundant structure for the multimode resonator 1, poor performance, and a significant reduction in the electric field polarization direction along the first radial x of the HE mode (e.g., HE...). ∥ The HE mode (e.g., HE) and the TE mode cannot be coupled or the coupling effect is poor. If two or more first coupling structures 30 are provided, although the effect of at least one first coupling structure 30 is not canceled, the HE mode (e.g., HE) with the electric field polarization direction along the first radial x can be coupled through the first coupling structure 30 with the uncancelled effect. ∥ The TE module is coupled with the TE module, but it also generates more parasitic coupling and the structure is relatively redundant.

[0096] In summary, the multimode resonator 1 provided in this application embodiment, having at least three resonant modes—HE mode and TE mode—and with the two electric field polarization directions of the HE mode along the first radial x and the second radial y respectively, can couple the HE mode (e.g., HE mode) along the first radial x through the first coupling part 31 of the first coupling structure 30. ∥ The TE mode is coupled through the second coupling part 32 of the first coupling structure 30, so that the electric field polarization direction is along the first radial x of the HE mode (e.g., HE). ∥ The TE module and the TE module can be coupled on the first coupling structure 30.

[0097] Furthermore, by setting two first coupling structures 30 and uniformly placing the second coupling portion 32 of each first coupling structure 30 on the same side of its first coupling portion 31, the current direction obtained by the coupled electric field energy of the two first coupling structures 30 is the same, and a circulating current loop can be formed along the path of "first coupling portion 31 of the first first coupling structure 30, second coupling portion 32 of the first first coupling structure 30, second coupling portion 32 of the second first coupling structure 30, first coupling portion 31 of the second first coupling structure 30, and first coupling portion 31 of the first first coupling structure 30". This allows both first coupling structures 30 to enable the electric field polarization direction to be along the first radial x-mode HE (e.g., HE). ∥The coupling of the HE mode (e.g., HE) and the TE mode allows the coupling polarity of the two first coupling structures 30 to be the same, ensuring that the coupling effects of the two first coupling structures 30 are superimposed rather than canceled out. This reduces or even eliminates the parasitic coupling that occurs when only one first coupling structure 30 is used. Thus, the two first coupling structures 30 can jointly enhance the HE mode (e.g., HE) along the first radial x direction of the electric field polarization direction. ∥ The coupling between the TE mode and the TE mode is optimized to improve the coupling strength and coupling effect, and reduce parasitic coupling, thereby improving the performance of the multimode resonator 1.

[0098] Please see Figure 3 , Figure 4 , Figure 8 In some embodiments of this application, the two first coupling structures 30 are arranged symmetrically about the second radial direction y. That is, the two first coupling structures 30 are respectively disposed on both sides of the second radial direction y, and the two first coupling structures 30 have the same specific structure, shape and size, and the distance between the two first coupling structures 30 and the second radial direction y is also the same, so that the two first coupling structures 30 are arranged symmetrically about the second radial direction y.

[0099] By adopting the above scheme, based on the previous embodiment, by symmetrically arranging the two first coupling structures 30 about the second radial direction y, the two first coupling structures 30 can be symmetrically located on both sides of the second radial direction y, the distance between the two first coupling structures 30 and the second radial direction y can be the same, and the specific structure, shape, and size of the two first coupling structures 30 can also be the same. Based on this, the structural design of the two first coupling structures 30 can be standardized and unified, and the molding convenience of each first coupling structure 30 can be improved.

[0100] Furthermore, the first coupling portions 31 of the two first coupling structures 30 can be aligned in a straight line, and the second coupling portions 32 of the two first coupling structures 30 can be aligned on the same circumference. Based on this, the current obtained by the coupling electric field energy of the two first coupling structures 30 can form a semi-circular circulating current loop along the first radial x and the circumference of the two second coupling portions 32. This can optimize the coupling strength and coupling effect of the coupling achieved by the two first coupling structures 30. Compared with the case where "the two first coupling structures 30 are not symmetrically arranged about the second radial y" and the case where "there is one or more first coupling structures 30", this embodiment can significantly reduce parasitic coupling or even basically eliminate parasitic coupling, thereby optimizing the performance indicators of the multimode resonator 1.

[0101] Please see Figure 4 , Figure 8 In some embodiments of this application, the first coupling structure 30 changes the coupling polarity by having the second coupling portion 32 alternately disposed on different sides of the first coupling portion 31.

[0102] It should be noted that, based on the premise that "one end of the second coupling part 32 is connected to the end of the first coupling part 31 away from the central axis L of the dielectric resonator 20" and "the second coupling parts 32 of the two first coupling structures 30 are uniformly disposed on the same side of the first coupling part 31," the second coupling part 32 may be disposed on either of the two opposite sides of the first coupling part 31. For example, such as... Figure 4 As shown, the second coupling portion 32 of the two first coupling structures 30 can be disposed on the upper side of the first coupling portion 31; conversely, as Figure 8 As shown, the second coupling part 32 of the two first coupling structures 30 can be provided on the lower side of the first coupling part 31.

[0103] and Figure 4 Compared to the first coupling structure 30 shown, Figure 8 The first coupling structure 30 shown reverses the orientation of the second coupling portion 32 by alternately placing it on the other side of the first coupling portion 31, thus reversing the direction of the current obtained by the first coupling structure 30 from the coupled electric field energy. This reverses the coupling polarity of the coupling achieved by the first coupling structure 30, i.e., the electric field polarization direction is reversed along the first radial x-mode (e.g., HE). ∥ The coupling polarity is reversed between the HE mode and the TE mode. Specifically, the coupling polarity reversal is the reversal of the positive and negative values ​​of the coupling coefficients between the HE mode and the TE mode, i.e., the reversal between positive and negative coupling.

[0104] By adopting the above scheme, the first coupling structure 30 can reverse the direction of the current obtained by coupling electric field energy by switching its second coupling part 32 to different sides of the first coupling part 31, thereby reversing the coupling polarity of the coupling achieved by the first coupling structure 30, that is, making the electric field polarization direction along the first radial x-mode (e.g., HE mode). ∥ The coupling polarity between the first coupling structure 30 and the TE mode is reversed. This allows for easy modification of the coupling polarity of the coupling implemented by the first coupling structure 30 as needed, facilitating the coupling design and simulation design of the multimode resonator 1, and improving the design flexibility and performance of the multimode resonator 1.

[0105] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the first coupling structure 30 is metallized on the end face of the dielectric resonator 20.

[0106] It should be noted that the first coupling structure 30 is a metal layer, and the first coupling structure 30 is directly metallized on the end face of the dielectric resonator 20. The first coupling structure 30 can be located on the end face of the dielectric resonator 20 facing the first wall 11, or on the end face of the dielectric resonator 20 away from the first wall 11. The metallization method can be, but is not limited to, electroplating, sputtering, chemical vapor deposition (CVD), physical vapor deposition (PVD), laser cladding, metal injection molding (MIM), etc. The metal material used in the first coupling structure 30 can be, but is not limited to, silver, copper, gold, nickel, alloys, etc.

[0107] By adopting the above scheme, the first coupling structure 30 is directly metallized on the end face of the dielectric resonator 20, which facilitates the processing and forming of the first coupling structure 30, improves the processing convenience, efficiency, and accuracy of the first coupling structure 30, simplifies the assembly process between the first coupling structure 30 and the dielectric resonator 20, and improves the assembly convenience and efficiency of the multimode resonator 1. Furthermore, the first coupling structure 30 can essentially share space with the dielectric resonator 20 without requiring additional space, thus allowing sufficient space between the dielectric resonator 20 and the resonator housing 10 for the placement of other components (such as the metal disk 80 and other debugging structures mentioned below). This optimizes and compacts the structural layout of the multimode resonator 1, facilitating its miniaturization and weight reduction. Furthermore, while the first coupling structure 30 is being formed, its length, width, and thickness are precisely determined and stabilized. The positions of the first coupling structure 30 and the first radial x, and between the first coupling structure 30 and the dielectric resonator 20, are precisely positioned and stabilized. The first coupling structure 30 can fit snugly and stably abut against the end face of the dielectric resonator 20, thereby optimizing and stabilizing the coupling strength and coupling effect achieved by the first coupling structure 30. This can ensure that the coupling strength and coupling effect achieved by the first coupling structure 30 meet expectations and optimize the performance of the multimode resonator 1.

[0108] Of course, in other embodiments, the first coupling structure 30 can also be a metal sheet, which can be fixed to the end face of the dielectric resonator 20 by means of bonding, welding, fastener connection, surface mounting, etc.; the metal sheet can also be fixed to the first wall 11 (or by means of support members at intervals) Figure 1 The second wall 12 shown is opposite to the first wall 11. In this case, the metal sheet can abut against the end face of the dielectric resonator 20, or the metal sheet can be spaced between the end face of the dielectric resonator 20 and the first wall 11 (or the second wall 12).

[0109] Please see Figure 2 , Figure 3 , Figure 4In some embodiments of this application, the multimode resonator 1 further includes a second coupling structure 40, which is disposed on the end side of the dielectric resonator 20. The second coupling structure 40 includes a third coupling portion 41 and a fourth coupling portion 42. The third coupling portion 41 extends along the second radial direction y, and one end of the fourth coupling portion 42 is connected to the end of the third coupling portion 41 away from the central axis L of the dielectric resonator 20. The fourth coupling portion 42 extends along the circumferential direction of the dielectric resonator 20.

[0110] It should be noted that at least one second coupling structure 40 is provided. The second coupling structure 40 is provided on the end side of the dielectric resonator 20, that is, the second coupling structure 40 can be provided on the end side of the dielectric resonator 20 facing the first wall 11, or on the end side of the dielectric resonator 20 away from the first wall 11. The second coupling structure 40 can abut against the end face of the dielectric resonator 20, or it can be spaced apart from the end face of the dielectric resonator 20. The second coupling structure 40 and the first coupling structure 30 can be provided on the same end side of the dielectric resonator 20, or they can be provided on different end sides of the dielectric resonator 20.

[0111] The second coupling structure 40 includes a third coupling portion 41 and a fourth coupling portion 42. The third coupling portion 41 extends along a second radial direction y to couple the HE mode (e.g., HE mode) whose electric field polarization direction is along the second radial direction y. ⊥ The electric field energy of the TE mode is coupled. The fourth coupling part 42 extends circumferentially along the dielectric resonator 20 to couple the electric field energy of the TE mode whose electric field polarization direction is along the circumferential direction of the dielectric resonator 20. Since the electric field energy of the TE mode is stronger near the outer peripheral surface of the dielectric resonator 20, in order to facilitate the coupling of more and stronger TE mode electric field energy by the fourth coupling part 42, one end of the fourth coupling part 42 is connected to the end of the third coupling part 41 away from the central axis L of the dielectric resonator 20 (i.e., the end of the third coupling part 41 close to the outer peripheral surface of the dielectric resonator 20). The fourth coupling part 42 and the third coupling part 41 can be directly connected or indirectly connected through other parts (such as the sixth coupling part 43 below). The third coupling part 41 couples the HE mode (e.g., HE mode) whose electric field polarization direction is along the second radial direction y. ⊥ The fourth coupling part 42 couples the TE mode, and the fourth coupling part 42 is connected to the third coupling part 41 in sequence. The electric field polarization direction is along the second radial y of the HE mode (e.g., HE). ⊥ The TE module and the TE module can be coupled on the second coupling structure 40.

[0112] The two opposite ends of the third coupling part 41 may be located on the same side of the central axis L of the dielectric resonator 20, or they may be located on opposite sides of the central axis L of the dielectric resonator 20, or one end may be located on the central axis L of the dielectric resonator 20.

[0113] In this configuration, the end of the third coupling portion 41 furthest from the central axis L of the dielectric resonator 20 cannot be connected to a non-end portion (e.g., the middle portion) of the fourth coupling portion 42. This causes the second coupling structure 40 to form a T-shaped structure, resulting in the two parts of the fourth coupling portion 42 located on either side of the third coupling portion 41 mutually canceling the coupling effect on the TE mode. Similarly, one end of the fourth coupling portion 42 cannot be connected to a non-end portion (e.g., the middle portion) of the third coupling portion 41, which also causes the second coupling structure 40 to form a T-shaped structure. This causes the two parts of the third coupling portion 41 located on either side of the fourth coupling portion 42 to mutually cancel the coupling effect on the HE mode (e.g., HE mode) along the second radial direction y. ⊥ The coupling effect of the module. That is, the third coupling part 41 and the fourth coupling part 42 need to be connected in sequence in an L-shape, an I-shape, or a sickle shape, etc.

[0114] Specifically, the size of the third coupling part 41 can be adjusted to adjust the relationship between the third coupling part 41 and the HE mode (e.g., HE) along the second radial direction y of the electric field polarization direction. ⊥ The coupling strength and coupling effect of the third coupling part 41. The dimensions of the third coupling part 41 include its length, width, and thickness. The length of the third coupling part 41 is its dimension along the second radial direction y, the thickness of the third coupling part 41 is its dimension along the axial direction of the dielectric resonator 20, and the width of the third coupling part 41 is its dimension in the direction perpendicular to its length and thickness directions. The larger the size of the third coupling part 41 (i.e., the larger any of its length, width, and thickness), the stronger the coupling strength and coupling effect between the third coupling part 41 and the HE mode (e.g., HE mode) with the electric field polarization direction along the second radial direction y. ⊥ The stronger the coupling strength of the modules, the better the coupling effect.

[0115] The coupling strength and coupling effect between the fourth coupling part 42 and the TE mode can be adjusted by adjusting the dimensions of the fourth coupling part 42. The dimensions of the fourth coupling part 42 include its length, width, and thickness. The length of the fourth coupling part 42 is its circumferential dimension along the dielectric resonator 20; the thickness of the fourth coupling part 42 is its axial dimension along the dielectric resonator 20; and the width of the fourth coupling part 42 is its dimension in the direction perpendicular to its length and thickness directions. The larger the dimensions of the fourth coupling part 42 (i.e., the larger any of its length, width, and thickness), the stronger the coupling strength and the better the coupling effect between the fourth coupling part 42 and the TE mode.

[0116] The coupling strength and coupling effect between the fourth coupling part 42 and the TE mode can be adjusted by changing the radius of the circle in which the fourth coupling part 42 is located. Since the electric field energy of the TE mode is stronger near the outer peripheral surface of the dielectric resonator 20, the larger the radius of the circle in which the fourth coupling part 42 is located, the stronger the coupling strength and the better the coupling effect between the fourth coupling part 42 and the TE mode.

[0117] The coupling strength and effect between the second coupling structure 40 and the HE and TE modes can be adjusted by changing the distance between the second coupling structure 40 and the dielectric resonator 20 along the axial direction of the dielectric resonator 20. Specifically, the smaller the distance between the second coupling structure 40 and the dielectric resonator 20 along the axial direction, the stronger the coupling strength and the better the coupling effect between the second coupling structure 40 and the HE and TE modes. Therefore, when the second coupling structure 40 abuts against the end face of the dielectric resonator 20, the coupling strength between the second coupling structure 40 and the HE and TE modes is relatively strong and the coupling effect is relatively good.

[0118] The second coupling structure 40 may be made of a metallic material, or it may be made by covering the surface of the insulating structure with a metallic material. The metallic material used in the second coupling structure 40 may be, but is not limited to, silver, copper, gold, nickel, alloys, etc.

[0119] The second coupling structure 40 can be formed independently relative to the dielectric resonator 20, or it can be integrally connected to the end face of the dielectric resonator 20, or it can be separately connected to the end face of the dielectric resonator 20, or it can be supported on the wall of the resonator housing 10 (e.g., the first wall 11 or the second wall 12). When the second coupling structure 40 is supported on the wall of the resonator housing 10 (e.g., the first wall 11 or the second wall 12), the second coupling structure 40 can abut against the end face of the dielectric resonator 20, or it can be spaced apart from the end face of the dielectric resonator 20.

[0120] By adopting the above scheme, in the HE mode (e.g., HE mode) where the electric field polarization direction is along the first radial x via the first coupling structure 30, the electric field polarization direction is achieved. ∥ Based on the coupling of the TE mode and the second coupling structure 40, the third coupling part 41 of the second coupling structure 40 can couple the HE mode (e.g., HE mode) along the second radial direction y. ⊥ The TE mode is coupled through the fourth coupling part 42 of the second coupling structure 40, so that the electric field polarization direction is along the second radial y of the HE mode (e.g., HE). ⊥ The first mode (HE mode) and the second mode (TE mode) can be coupled on the second coupling structure 40. Thus, the multimode resonator 1 can, via the first coupling structure 30 and the second coupling structure 40, enable HE dual-mode (e.g., HE) coupling. ∥ Model and HE ⊥The three modes (HE dual-mode, TE mode) are coupled to each other, with good coupling effect. It is also convenient to build cascade coupling relationship and cross coupling relationship between the three modes (HE dual-mode, TE mode) as needed to form transmission zero point. This can optimize the structural design, coupling design and overall performance (especially out-of-band suppression performance) of the multimode resonator 1, and facilitate the simulation design of the multimode resonator 1.

[0121] Of course, in other embodiments, where one of the HE dual-mode modes does not need to be coupled with the TE mode, such as when the three modes of HE dual-mode and TE mode only need to be cascaded, the second coupling structure 40 can be omitted.

[0122] Please see Figure 3 , Figure 4 , Figure 8 In some embodiments of this application, two second coupling structures 40 are provided, and the fourth coupling portions 42 of the two second coupling structures 40 are all located on the same side of the third coupling portion 41.

[0123] It should be noted that in this embodiment, two second coupling structures 40 are provided. The specific construction (e.g., the location and size of the third coupling part 41, the location and size of the fourth coupling part 42, whether the third coupling part 41 and the fourth coupling part 42 are directly connected or indirectly connected via the sixth coupling part 43, etc.), shape, etc. of the two second coupling structures 40 can be the same or different. The two second coupling structures 40 can be arranged symmetrically or asymmetrically.

[0124] Based on the premise that "one end of the fourth coupling part 42 is connected to the end of the third coupling part 41 away from the central axis L of the dielectric resonator 20", the fourth coupling part 42 may be located on either side of the opposite sides of the third coupling part 41. In the case where there are two second coupling structures 40, the fourth coupling part 42 of each second coupling structure 40 is uniformly located on the same side of its third coupling part 41. For example, as... Figure 4 As shown, the fourth coupling portion 42 of the two second coupling structures 40 is uniformly located on the right side of their third coupling portion 41; conversely, as... Figure 8 As shown, the fourth coupling part 42 of the two second coupling structures 40 is uniformly located on the left side of their third coupling part 41.

[0125] Based on this, the current directions obtained by the coupled electric field energy of the two second coupling structures 40 are the same, and a circulating current loop can be formed along the path of "the third coupling part 41 of the first second coupling structure 40, the fourth coupling part 42 of the first second coupling structure 40, the fourth coupling part 42 of the second second coupling structure 40, the third coupling part 41 of the second second coupling structure 40, and the third coupling part 41 of the first second coupling structure 40". This allows both second coupling structures 40 to enable the electric field polarization direction to be along the second radial y-mode HE (e.g., HE). ⊥ The coupling of the two second coupling structures 40 with the TE structure can make the coupling polarity of the two second coupling structures 40 the same, so that the coupling effects of the two second coupling structures 40 can be superimposed and will not cancel each other out. It can weaken or even eliminate the parasitic coupling generated when there is only one second coupling structure 40.

[0126] In this configuration, the two third coupling portions 41 of the two second coupling structures 40 can be respectively disposed on both sides of the central axis L of the dielectric resonator 20; alternatively, the two opposite ends of the third coupling portion 41 of one second coupling structure 40 can be disposed on opposite sides of the central axis L of the dielectric resonator 20, while the two opposite ends of the third coupling portion 41 of the other second coupling structure 40 can be disposed on the same side of the central axis L of the dielectric resonator 20. That is, in this case, based on the fact that the two third coupling portions 41 of the two second coupling structures 40 are both extended along the second radial direction y, the third coupling portion 41 of one second coupling structure 40 passes through the central axis L of the dielectric resonator 20, while the third coupling portion 41 of the other second coupling structure 40 does not pass through the central axis L of the dielectric resonator 20.

[0127] In order for the current obtained by the coupling electric field energy of the two second coupling structures 40 to form a circulating current loop, the two fourth coupling parts 42 of the two second coupling structures 40 should be located on opposite sides of the central axis L of the dielectric resonator 20.

[0128] The third coupling portions 41 of the two second coupling structures 40 can be disconnected, spaced apart, or connected together. These two third coupling portions 41 will not cancel each other out the HE mode (e.g., HE) along the second radial direction y of the electric field polarization direction. ⊥ The coupling effect of the module.

[0129] It should be further noted that if only one second coupling structure 40 is provided, this second coupling structure 40 will cause the electric field polarization direction to be along the second radial direction y in the HE mode (e.g., HE). ⊥While the first mode is coupled with the second mode (TE mode), additional parasitic coupling is also generated. If there are two second coupling structures 40, but one of the second coupling structures 40 has its fourth coupling part 42 located on one side (e.g., the right side) of its third coupling part 41, and the other has its fourth coupling part 42 located on the other side (e.g., the left side) of its third coupling part 41, then the coupling polarities of the two second coupling structures 40 will be opposite, causing the two second coupling structures 40 to cancel each other out, and additional parasitic coupling will be generated. This results in a redundant and complex structure of the multimode resonator 1, poor performance indicators, and causes the HE mode (e.g., HE mode) with the electric field polarization direction along the second radial y to be affected. ⊥ The HE mode (e.g., HE) and the TE mode cannot be coupled or the coupling effect is poor. If two or more second coupling structures 40 are provided, although the effect of at least one second coupling structure 40 is not canceled, the HE mode (e.g., HE) with the electric field polarization direction along the second radial y can be coupled through the second coupling structure 40 with the uncancelled effect. ⊥ The TE module is coupled with the TE module, but it also generates more parasitic coupling and the structure is relatively redundant.

[0130] By adopting the above scheme, two second coupling structures 40 can be set up, and the fourth coupling part 42 of each second coupling structure 40 can be uniformly located on the same side of its third coupling part 41. This ensures that the current direction obtained by the coupling electric field energy of the two second coupling structures 40 is the same, and a circulating current loop can be formed along the path of "the third coupling part 41 of the first second coupling structure 40, the fourth coupling part 42 of the first second coupling structure 40, the fourth coupling part 42 of the second second coupling structure 40, the third coupling part 41 of the second second coupling structure 40, and the third coupling part 41 of the first second coupling structure 40". This allows both second coupling structures 40 to make the electric field polarization direction along the second radial y-mode HE (e.g., HE). ⊥ The coupling of the HE mode (e.g., HE mode) and the TE mode allows the coupling polarity of the two second coupling structures 40 to be the same, ensuring that the coupling effects of the two second coupling structures 40 are superimposed rather than canceled out. This can weaken or even eliminate the parasitic coupling that occurs when there is only one second coupling structure 40. Thus, the two second coupling structures 40 can jointly enhance the HE mode (e.g., HE mode) along the second radial direction y via the electric field polarization direction. ⊥ The coupling between the TE mode and the TE mode is optimized to improve the coupling strength and coupling effect, and reduce parasitic coupling, thereby improving the performance of the multimode resonator 1.

[0131] Of course, in other embodiments, only one second coupling structure 40 may be provided; or, two or more second coupling structures 40 may be provided, and the utility of at least one second coupling structure 40 is not canceled out.

[0132] Please see Figure 3 , Figure 4 , Figure 8 In some embodiments of this application, the two second coupling structures 40 are arranged symmetrically about the first radial x. That is, the two second coupling structures 40 are respectively disposed on both sides of the first radial x, and the two second coupling structures 40 have the same specific structure, shape and size, and the distance between the two second coupling structures 40 and the first radial x is also the same, so that the two second coupling structures 40 are arranged symmetrically about the first radial x.

[0133] By adopting the above scheme, based on the previous embodiment, by symmetrically arranging the two second coupling structures 40 about the first radial direction x, the two second coupling structures 40 can be symmetrically located on both sides of the first radial direction x, the distance between the two second coupling structures 40 and the first radial direction x can be the same, and the specific structure, shape, and size of the two second coupling structures 40 can also be the same. Based on this, the structural design of the two second coupling structures 40 can be standardized and unified, and the molding convenience of each second coupling structure 40 can be improved.

[0134] Furthermore, the third coupling portions 41 of the two second coupling structures 40 can be aligned in a straight line, and the fourth coupling portions 42 of the two second coupling structures 40 can be aligned in the same circle. Based on this, the current obtained by the coupling electric field energy of the two second coupling structures 40 can form a semi-circular circulating current loop along the second radial direction y and the circle where the two fourth coupling portions 42 are located. This can optimize the coupling strength and coupling effect of the coupling achieved by the two second coupling structures 40. Compared with the case where "the two second coupling structures 40 are not symmetrically arranged about the first radial direction x" and the case where "there is one or more second coupling structures 40", this embodiment can significantly reduce parasitic coupling or even basically eliminate parasitic coupling, and optimize the performance index of the multimode resonator 1.

[0135] Please see Figure 4 , Figure 8 In some embodiments of this application, the second coupling structure 40 changes the coupling polarity by switching the fourth coupling portion 42 to different sides of the third coupling portion 41.

[0136] It should be noted that, based on the premise that "one end of the fourth coupling part 42 is connected to the end of the third coupling part 41 away from the central axis L of the dielectric resonator 20" and "the fourth coupling parts 42 of the two second coupling structures 40 are uniformly located on the same side of the third coupling part 41," the fourth coupling part 42 may be located on either of the two opposite sides of the third coupling part 41. For example, such as... Figure 4 As shown, the fourth coupling portion 42 of the two second coupling structures 40 can be provided on the right side of the third coupling portion 41; conversely, as Figure 8As shown, the fourth coupling part 42 of the two second coupling structures 40 can be provided on the left side of the third coupling part 41.

[0137] and Figure 4 Compared to the second coupling structure 40 shown, Figure 8 The second coupling structure 40 shown reverses the orientation of its fourth coupling portion 42 by switching it to the other side of the third coupling portion 41, thus reversing the direction of the current obtained by the second coupling structure 40 from the coupled electric field energy. This reverses the coupling polarity of the coupling achieved by the second coupling structure 40, i.e., the electric field polarization direction is reversed along the second radial y-mode (e.g., HE). ⊥ The coupling polarity is reversed between the HE mode and the TE mode. Specifically, the coupling polarity reversal is the reversal of the positive and negative values ​​of the coupling coefficients between the HE mode and the TE mode, i.e., the reversal between positive and negative coupling.

[0138] By adopting the above scheme, the second coupling structure 40 can reverse the direction of the current obtained by coupling electric field energy by switching its fourth coupling part 42 to different sides of the third coupling part 41, thereby reversing the coupling polarity of the coupling achieved by the second coupling structure 40. That is, the electric field polarization direction is reversed along the second radial y-mode (e.g., HE). ⊥ The coupling polarity between the TE mode and the TE mode is reversed. This allows for easy modification of the coupling polarity achieved by the second coupling structure 40 as needed, facilitating the coupling design and simulation design of the multimode resonator 1, and improving the design flexibility and performance of the multimode resonator 1.

[0139] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the second coupling structure 40 is metallized on the end face of the dielectric resonator 20.

[0140] It should be noted that the second coupling structure 40 is a metal layer, and the second coupling structure 40 is directly metallized on the end face of the dielectric resonator 20. The second coupling structure 40 can be located on the end face of the dielectric resonator 20 facing the first wall 11, or on the end face of the dielectric resonator 20 away from the first wall 11. The metallization method can be, but is not limited to, electroplating, sputtering, chemical vapor deposition (CVD), physical vapor deposition (PVD), laser cladding, metal injection molding (MIM), etc. The metal material used in the second coupling structure 40 can be, but is not limited to, silver, copper, gold, nickel, alloys, etc.

[0141] By adopting the above scheme, and by directly metallizing the second coupling structure 40 on the end face of the dielectric resonator 20, the processing and forming of the second coupling structure 40 can be facilitated, improving the processing convenience, efficiency, and accuracy of the second coupling structure 40. This simplifies the assembly process between the second coupling structure 40 and the dielectric resonator 20, and improves the assembly convenience and efficiency of the multimode resonator 1. Furthermore, the second coupling structure 40 can essentially share space with the dielectric resonator 20 without requiring additional space, thus allowing sufficient space between the dielectric resonator 20 and the resonator housing 10 for the placement of other components (such as the metal disk 80 and other debugging structures mentioned below). This optimizes and compacts the structural layout of the multimode resonator 1, facilitating its miniaturization and weight reduction. Furthermore, while the second coupling structure 40 is being formed, its length, width, and thickness are precisely determined and stabilized. The positions of the second coupling structure 40 and the second radial direction y, and between the second coupling structure 40 and the dielectric resonator 20, are precisely positioned and stabilized. The second coupling structure 40 can fit snugly and stably abut against the end face of the dielectric resonator 20, thereby optimizing and stabilizing the coupling strength and coupling effect achieved by the second coupling structure 40. This ensures that the coupling strength and coupling effect achieved by the second coupling structure 40 meet expectations and optimizes the performance of the multimode resonator 1.

[0142] Of course, in other embodiments, the second coupling structure 40 can also be a metal sheet, which can be fixed to the end face of the dielectric resonator 20 by means of bonding, welding, fastener connection, surface mounting, etc.; the metal sheet can also be fixed to the first wall 11 (or by means of support members at intervals) Figure 1 The second wall 12 shown is opposite to the first wall 11. In this case, the metal sheet can abut against the end face of the dielectric resonator 20, or the metal sheet can be spaced between the end face of the dielectric resonator 20 and the first wall 11 (or the second wall 12).

[0143] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the first coupling structure 30 and the second coupling structure 40 are disposed on the same end side of the dielectric resonator 20. That is, both the first coupling structure 30 and the second coupling structure 40 are disposed on the end side of the dielectric resonator 20 facing the first wall 11, or both the first coupling structure 30 and the second coupling structure 40 are disposed on the end side of the dielectric resonator 20 facing away from the first wall 11.

[0144] By adopting the above scheme, it is convenient to directly set the first coupling structure 30 and the second coupling structure 40 on one end of the dielectric resonator 20. Compared with the situation of "setting the first coupling structure 30 on one end of the dielectric resonator 20, then flipping the dielectric resonator 20 and setting the second coupling structure 40 on the other end of the dielectric resonator 20", the processing procedure can be significantly simplified, thereby improving the processing convenience, processing efficiency and processing accuracy of the first coupling structure 30 and the second coupling structure 40. The coupling strength and coupling effect achieved by the first coupling structure 30 can be optimized and stabilized, and the coupling strength and coupling effect achieved by the second coupling structure 40 can be optimized and stabilized, thereby optimizing the performance of the multimode resonator 1.

[0145] Of course, in other embodiments, the first coupling structure 30 and the second coupling structure 40 may be disposed on the two ends of the dielectric resonator 20.

[0146] In some cases, multimode resonators can be made by cutting a slot in each of the four radial directions (45°, 135°, 225°, and 315°) of the dielectric cylinder, with each slot having the same depth and length, so that HE ∥ The electric field polarization direction of the mode is along the 0° radial direction, and makes HE ⊥ The electric field polarization direction of the mode is along a 90° radial direction. This is theoretically feasible, but in actual products, due to processing errors and the difficulty in precisely controlling processing accuracy, HE... ∥ Model, HE ⊥ The electric field polarization direction of the mode will deviate from the preset direction, causing the coupling strength and coupling effect achieved by the coupling structure associated with the HE mode to also deviate from the expected direction.

[0147] To resolve this issue, please refer to Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the dielectric resonator 20 is provided with a first opening structure 21 in the first radial x and a second opening structure 22 in the second radial y. The first opening structure 21 includes at least one first opening 211, and the second opening structure 22 includes at least one second opening 221. The first opening structure 21 and the second opening structure 22 are non-rotationally symmetric along the central axis L of the dielectric resonator 20, so that the two electric field polarization directions of the HE mode are respectively along the first radial x and the second radial y.

[0148] It should be noted that the dielectric resonator 20 has a first opening structure 21 on the first radial direction x, and in particular, the first opening structure 21 is located on the first longitudinal section of the dielectric resonator 20, which is a plane jointly defined by the first radial direction x and the central axis L of the dielectric resonator 20. The first opening structure 21 includes at least one first opening 211. When there are multiple first openings 211, the multiple first openings 211 are arranged at intervals along the first radial direction x. The multiple first openings 211 can be arranged at equal intervals or at unequal intervals; the multiple first openings 211 can be uniformly located on one side of the central axis L of the dielectric resonator 20, or they can be distributed on both sides of the central axis L of the dielectric resonator 20; the multiple first openings 211 can be symmetrically distributed about the central axis L of the dielectric resonator 20 or asymmetrically distributed. The first opening 211 can be a hole structure, such as a through hole or a blind hole, such as a circular hole, a rectangular hole, an oblong hole, an irregular hole, etc.; the first opening 211 can also be a groove structure, such as a straight groove, a curved groove, an arc groove, etc. The first opening 211 can be opened on any end face of the dielectric resonator 20 along its own axial direction, or it can be opened on the outer peripheral surface of the dielectric resonator 20.

[0149] The dielectric resonator 20 has a second opening structure 22 on the second radial direction y, and more particularly, the second opening structure 22 is located on the second longitudinal section of the dielectric resonator 20, which is a plane jointly defined by the second radial direction y and the central axis L of the dielectric resonator 20. The second opening structure 22 includes at least one second opening 221. When there are multiple second openings 221, the multiple second openings 221 are arranged at intervals along the second radial direction y, wherein the multiple second openings 221 can be arranged at equal intervals or at unequal intervals; the multiple second openings 221 can be uniformly located on one side of the central axis L of the dielectric resonator 20, or they can be distributed on both sides of the central axis L of the dielectric resonator 20; the multiple second openings 221 can be symmetrically distributed about the central axis L of the dielectric resonator 20 or asymmetrically distributed. The second opening 221 can be a hole structure, such as a through hole or a blind hole, such as a circular hole, a rectangular hole, an oblong hole, an irregular hole, etc.; the second opening 221 can also be a groove structure, such as a straight groove, a curved groove, an arc groove, etc. The second opening 221 can be opened on any end face of the dielectric resonator 20 along its own axial direction, or it can be opened on the outer peripheral surface of the dielectric resonator 20.

[0150] The first opening structure 21 and the second opening structure 22 are non-rotationally symmetric along the central axis L of the dielectric resonator 20. That is, when the first opening structure 21 rotates around the central axis L of the dielectric resonator 20 to the second radial direction y, it cannot completely coincide with the second opening structure 22, and when the second opening structure 22 rotates around the central axis L of the dielectric resonator 20 to the first radial direction x, it cannot completely coincide with the first opening structure 21. There are various ways to achieve the "non-rotationally symmetric structure of the first opening structure 21 and the second opening structure 22 along the central axis L of the dielectric resonator 20". For example, the number of first openings 211 and the number of second openings 221 can be different; the shapes of the first openings 211 and the second openings 221 can be different; the sizes of the first openings 211 and the second openings 221 can be different; the distance from the first opening 211 to the central axis L of the dielectric resonator 20 can be different from the distance from the second opening 221 to the central axis L of the dielectric resonator 20, and so on.

[0151] Since the first opening structure 21 and the second opening structure 22 are non-rotationally symmetric along the central axis L of the dielectric resonator 20, they disrupt the rotational symmetry of the dielectric resonator 20, giving it unique characteristics in the first radial direction x and the second radial direction y. Based on this, the first opening structure 21 and the second opening structure 22 can create specific "perturbations" and "guidance" on the electric field of the HE mode, causing the electric field distribution of the HE mode to be non-uniform. This allows the two electric field polarization directions of the HE mode to be along the first radial direction x and the second radial direction y, respectively. Specifically, the first opening structure 21 can cause one electric field polarization direction of the HE mode to be along the first radial direction x, and the second opening structure 22 can cause the other electric field polarization direction of the HE mode to be along the second radial direction y. For example, the first opening structure 21 can cause the HE mode to... ∥ The electric field polarization direction of the mode is along the first radial x (e.g., Figure 5 As shown), the second opening structure 22 can facilitate HE ⊥ The electric field polarization direction of the mode is along the second radial direction y (e.g., Figure 6 shown), HE ∥ The electric field polarization direction of the mode, HE ⊥ The electric field polarization direction of the mode is the same as the two electric field polarization directions of the HE mode.

[0152] It should also be noted that the first opening structure 21 can hollow out the area of ​​the dielectric resonator 20 corresponding to the first opening structure 21, reducing or even eliminating the thickness of the portion of the dielectric resonator 20 along its axial and radial directions corresponding to the first opening structure 21. This allows the electric field path of the HE mode to pass directly through the first opening structure 21, thus shortening the electric field path of the HE mode. Therefore, the first opening structure 21 not only has the function of "precisely guiding and controlling one electric field polarization direction of the HE mode along the first radial x", but also has the function of "increasing the resonant frequency of the TE mode" and "increasing the resonant frequency of the HE mode". Specifically, the more first openings 211 there are, the higher the resonant frequency of the TE mode and the higher the resonant frequency of the HE mode; the larger the size of the first opening 211 (e.g., the deeper, the wider, or the longer the extension length, etc.), the higher the resonant frequency of the TE mode and the higher the resonant frequency of the HE mode; the closer the position of the first opening 211 is to the central axis L of the dielectric resonator 20, the lower the resonant frequency of the TE mode and the higher the resonant frequency of the HE mode; and so on.

[0153] Similarly, the second opening structure 22 can hollow out the region of the dielectric resonator 20 corresponding to the second opening structure 22, reducing or even eliminating the thickness of the portion of the dielectric resonator 20 along its axial and radial directions corresponding to the second opening structure 22. This allows the electric field path of the HE mode to pass directly through the second opening structure 22, shortening the HE mode's electric field path. Therefore, the second opening structure 22 not only has the function of "precisely guiding and controlling the other electric field polarization direction of the HE mode along the second radial direction y," but also has the function of "increasing the resonant frequency of the TE mode" and "increasing the resonant frequency of the HE mode." Specifically, the more second openings 221 there are, the higher the resonant frequency of both the TE and HE modes; the larger the size of the second opening 221 (e.g., the deeper, wider, or longer the extension), the higher the resonant frequency of both the TE and HE modes; the closer the position of the second opening 221 is to the central axis L of the dielectric resonator 20, the lower the resonant frequency of the TE mode and the higher the resonant frequency of the HE mode; and so on.

[0154] By adopting the above scheme, a first opening structure 21 can be provided on the first radial direction x of the dielectric resonator 20, and a second opening structure 22 can be provided on the second radial direction y of the dielectric resonator 20. The first opening structure 21 and the second opening structure 22 are arranged in a non-rotationally symmetric structure along the central axis L of the dielectric resonator 20. This allows the first opening structure 21 and the second opening structure 22 to disrupt the rotational symmetry of the dielectric resonator 20, thus enabling the dielectric resonator 20 to have unique characteristics in the first radial direction x and the second radial direction y, respectively. Based on this, the first opening structure 21 and the second opening structure 22 can create specific "perturbations" and "guidance" on the electric field of the HE mode, thereby causing the two electric field polarization directions of the HE mode to be along the first radial direction x and the second radial direction y, respectively. Furthermore, since the first opening structure 21 and the second opening structure 22 are designed differently (i.e., set differently), the processing of the first opening structure 21 and the second opening structure 22 can accommodate certain processing errors. The processing errors and processing accuracy do not significantly affect the formation of differences and non-rotationally symmetric structures between the first opening structure 21 and the second opening structure 22. Therefore, the requirements for processing errors and processing accuracy of the first opening structure 21 and the second opening structure 22 can be reduced. It is convenient to accurately guide and control one electric field polarization direction of the HE mode along the first radial x via the first opening structure 21, and to accurately guide and control the other electric field polarization direction of the HE mode along the second radial y via the second opening structure 22. Thus, it is possible to accurately guide and control the two electric field polarization directions of the HE mode along the preset direction. It is convenient to design coupling structures (such as the first coupling structure 30, the second coupling structure 40, the third coupling structure 70, etc.) based on the accurately determined and unbiased first radial x and second radial y. It can make the coupling strength and coupling effect achieved by each coupling structure meet the expectations, and facilitate the coupling design and simulation design of the multimode resonator 1. It can improve the processing convenience, design flexibility, consistency and stability of the multimode resonator 1.

[0155] Furthermore, based on the first opening structure 21 and the second opening structure 22, the resonant frequency of the TE mode and the resonant frequency of the HE mode can be easily adjusted. Based on this, the multimode resonator 1 can realize three resonant modes: single-cavity coupled HE mode and TE mode, thereby improving the performance and design flexibility of the multimode resonator 1.

[0156] Please see Figure 2 , Figure 3 , Figure 4In some embodiments of this application, when there is one first opening 211, the distance between the first opening 211 and the central axis L of the dielectric resonator 20 along the first radial direction x is a first distance d1; when there are multiple first openings 211, the distance between the two farthest first openings 211 along the first radial direction x is the first distance d1. When there is one second opening 221, the distance between the second opening 221 and the central axis L of the dielectric resonator 20 along the second radial direction y is a second distance d2; when there are multiple second openings 221, the distance between the two farthest second openings 221 along the second radial direction y is the second distance d2. Wherein, the first distance d1 is not equal to the second distance d2.

[0157] It should be noted that, as Figure 4 As shown, in some embodiments, the first opening structure 21 includes a plurality of first openings 211 spaced apart along a first radial direction x. In this case, the distance (i.e., minimum distance) between the peripheries (e.g., hole edges, slot edges, etc.) of the two farthest first openings 211 along the first radial direction x is a first distance d1. In other embodiments, the first opening structure 21 includes only one first opening 211. In this case, the distance (i.e., minimum distance) from the periphery (e.g., hole edges, slot edges, etc.) of the first opening 211 to the central axis L of the dielectric resonator 20 along the first radial direction x is a first distance d1.

[0158] like Figure 4 As shown, in some embodiments, the second opening structure 22 includes a plurality of second openings 221 spaced apart along a second radial direction y. In this case, the distance (i.e., minimum distance) between the peripheries (e.g., hole edges, slot edges, etc.) of the two second openings 221 that are farthest apart along the second radial direction y is the second distance d2. In other embodiments, the second opening structure 22 includes only one second opening 221. In this case, the distance (i.e., minimum distance) from the periphery (e.g., hole edges, slot edges, etc.) of the second opening 221 to the central axis L of the dielectric resonator 20 along the second radial direction y is the second distance d2.

[0159] The number of second openings 221 can be the same as or different from the number of first openings 211. That is, if there is one first opening 211, there can be one or more second openings 221. If there are multiple first openings 211, there can be one or more second openings 221.

[0160] Wherein, the first distance d1 is not equal to the second distance d2, that is, the first distance d1 can be greater than or less than the second distance d2.

[0161] By adopting the above scheme, a significant difference can be created between the first opening structure 21 and the second opening structure 22 by making the first distance d1 not equal to the second distance d2. This allows for a convenient, quick, and reliable non-rotationally symmetric structure of the first opening structure 21 and the second opening structure 22 along the central axis L of the dielectric resonator 20. Based on this, it is convenient to accurately guide and control one electric field polarization direction of the HE mode along the first radial x via the first opening structure 21, and to accurately guide and control the other electric field polarization direction of the HE mode along the second radial y via the second opening structure 22. This also reduces the requirements for processing errors and processing accuracy, thereby improving the processing convenience, consistency, and stability of the multimode resonator 1. It also facilitates the design of coupling structures (such as the first coupling structure 30, the second coupling structure 40, the third coupling structure 70, etc.) based on the precisely determined and unbiased first radial x and second radial y, ensuring that the coupling strength and coupling effect achieved by the coupling structure meet expectations.

[0162] Furthermore, based on this embodiment, the shape and size of the first opening 211 can be set to be the same as the shape and size of the second opening 221. Based on this, the design of the first opening 211 and the second opening 221 can be unified by precisely controlling the two electric field polarization directions of the HE mode along the preset first radial x and second radial y. This simplifies the structural design of the first opening structure 21 and the second opening structure 22, and improves the processing convenience and efficiency of the first opening structure 21, the second opening structure 22 and the dielectric resonator 20.

[0163] Of course, in other embodiments, this embodiment is also suitable for being combined with situations such as "the number of the first opening 211 and the number of the second opening 221 are different", "the shape of the first opening 211 and the shape of the second opening 221 are different", and "the size of the first opening 211 and the size of the second opening 221 are different" as needed, so as to increase the difference between the first opening structure 21 and the second opening structure 22, and control the two electric field polarization directions of the HE mode along the preset first radial x and second radial y.

[0164] Of course, in other embodiments, if the first opening structure 21 and the second opening structure 22 are made to be non-rotationally symmetric along the central axis L of the dielectric resonator 20, the first distance d1 can be made equal to the second distance d2 as needed.

[0165] Please see Figure 2 , Figure 3 , Figure 4 , Figure 9 In some embodiments of this application, the first opening 211 is formed on the end face of the dielectric resonator 20 and is located between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20.

[0166] It should be noted that the first opening 211 can be a hole structure or a slot structure. The first opening 211 is formed on the end face of the dielectric resonator 20 and is located between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20. That is, the first opening 211 can connect to at least one end face of the dielectric resonator 20, but not to the outer peripheral surface of the dielectric resonator 20. Among them, the first opening 211 can be exactly centered between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20, or it can be offset towards the outer peripheral surface of the dielectric resonator 20 or towards the central axis L of the dielectric resonator 20.

[0167] By adopting the above scheme, the first opening structure 21 can be used to guide and control the electric field polarization direction of the HE mode along the first radial direction x, and the orientation of the first radial direction x can be directly determined from the end face of the dielectric resonator 20. This facilitates the design of coupling structures (e.g., first coupling structure 30, third coupling structure 70, etc.) based on the first radial direction x, and promotes the coupling structure to be aligned with the HE mode (e.g., HE mode) along the first radial direction x. ∥ The coupling strength and coupling effect of the module are as expected.

[0168] By adopting the above scheme, the depth direction of the first opening 211 can correspond to the axial direction of the dielectric resonator 20, which facilitates direct thinning of a specific area of ​​the dielectric resonator 20 along its axial direction. This allows for convenient, controllable, and precise enhancement of the resonant frequencies of the HE mode and the TE mode as needed. Furthermore, since the first opening 211 is located between the outer peripheral surface of the dielectric resonator 20 and its central axis L, and does not connect to the outer peripheral surface, it does not disrupt the integrity of the outer peripheral surface. Therefore, the first opening 211 has minimal impact on the capacitance between the dielectric resonator 20 and the inner wall of the resonator housing 10, resulting in a smaller increase in the resonant frequency of the HE mode and a less significant influence on its resonant frequency. This reduces the impact of the first opening 211 on the resonant frequency of the HE mode. The opening 211 has an excessive impact on the resonant frequency of the HE mode, which may cause the resonant frequency of the HE mode to increase abruptly. This allows for more precise control of the resonant frequency of the HE mode. That is, while increasing the resonant frequency of the HE mode, the resonant frequency of the HE mode can be increased more accurately, precisely, and stably. The resonant frequency of the HE mode can be more accurately controlled to be within the passband and close to the desired frequency band. This avoids the resonant frequency of the HE mode exceeding the passband and the desired frequency band due to the first opening 211 damaging the integrity of the outer peripheral surface of the dielectric resonator 20.

[0169] Furthermore, since the electric field of the TE mode is concentrated around the periphery of the dielectric resonator 20, the first opening 211 has the greatest impact on the resonant frequency of the TE mode when it is located on the outer periphery of the dielectric resonator 20, and the least impact when it is located on the central axis of the dielectric resonator 20. By placing the first opening 211 between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20, the first opening 211 can avoid the outer peripheral surface of the dielectric resonator 20, which can reduce the situation where the resonant frequency of the TE mode increases abruptly due to the excessive influence of the first opening 211 on the resonant frequency of the TE mode; at the same time, the first opening 211 can also avoid the central axis L of the dielectric resonator 20, which can reduce the situation where the resonant frequency of the TE mode cannot increase significantly due to the insufficient influence of the first opening 211 on the resonant frequency of the TE mode. Based on this, the resonant frequency of the TE mode can be more precisely controlled. That is, while increasing the resonant frequency of the TE mode, the resonant frequency of the TE mode can be increased more accurately, precisely, and stably. The resonant frequency of the TE mode can be controlled more precisely, which makes it easier to design the resonant frequency of the TE mode to be "within the passband and close to the same frequency band as the resonant frequency of the HE mode". It also makes it easier for the multimode resonator 1 to realize three resonant modes: single-cavity coupled HE mode and TE mode, which can improve the performance and design flexibility of the multimode resonator 1.

[0170] Furthermore, since the first opening 211 is located on the end face of the dielectric resonator 20, it is convenient to design a mold and to integrally form the dielectric resonator 20 and its first opening 211 through the mold. In particular, it can improve the demolding convenience of the mold after the dielectric resonator 20 is formed (demolding can be performed along the axial direction of the dielectric resonator 20), improve the molding convenience and molding accuracy of the dielectric resonator 20, and reduce the mold cost and the processing cost of the dielectric resonator 20.

[0171] Of course, such as Figure 10 As shown, in other embodiments, at least one first opening 211 may be formed on the outer peripheral surface of the dielectric resonator 20 and communicate with at least one end face of the dielectric resonator 20. Figure 11As shown, in other embodiments, at least one first opening 211 may be formed on the outer peripheral surface of the dielectric resonator 20 and disposed between the two end faces of the dielectric resonator 20. Theoretically, based on the non-rotationally symmetric structure of the first opening structure 21 and the second opening structure 22 along the central axis L of the dielectric resonator 20, these two embodiments can also achieve precise guidance and control of the two electric field polarization directions of the HE mode along a preset direction. However, since the first opening 211 is formed on the outer peripheral surface of the dielectric resonator 20, the first opening 211 will disrupt the integrity of the outer peripheral surface of the dielectric resonator 20. The first opening 211 may affect the capacitance between the dielectric resonator 20 and the inner wall of the resonator housing 10, and the first opening 211 will affect the increase of the resonant frequency of the HE mode. The amplitude may be large, and the first opening 211 may have a significant impact on the resonant frequency of the HE mode. Based on this, the resonant frequency of the HE mode may increase abruptly due to the significant impact of the first opening 211 on the resonant frequency of the HE mode. Compared with the embodiment in which "the first opening 211 is opened on the end face of the dielectric resonator 20 and is located between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20", these two embodiments are less convenient for finely controlling the resonant frequency of the HE mode. That is, it is relatively more difficult to "control the resonant frequency of the HE mode to be within the passband range and close to the desired frequency band".

[0172] It should be noted that in the three embodiments, namely, "at least one first opening 211 is opened on the end face of the dielectric resonator 20 and is located between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20", "at least one first opening 211 is opened on the outer peripheral surface of the dielectric resonator 20 and communicates with at least one end face of the dielectric resonator 20", and "at least one first opening 211 is opened on the outer peripheral surface of the dielectric resonator 20 and is located between the two end faces of the dielectric resonator 20", one of these embodiments can be selected when there is only one first opening 211; and when there are multiple first openings 211, they can be implemented individually, in pairs, or all in combination.

[0173] It should be noted that since the embodiment in which "at least one first opening 211 is opened on the end face of the dielectric resonator 20 and is located between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20" is more effective, especially in facilitating more precise control of the resonant frequency of the HE mode, this application tends to implement this embodiment alone, that is, tends to implement "all first openings 211 are opened on the end face of the dielectric resonator 20 and are located between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20".

[0174] Please see Figure 2 , Figure 3 , Figure 4 , Figure 9In some embodiments of this application, the second opening 221 is formed on the end face of the dielectric resonator 20 and is located between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20.

[0175] It should be noted that the second opening 221 can be a hole structure or a slot structure. The second opening 221 is formed on the end face of the dielectric resonator 20 and is located between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20. That is, the second opening 221 can connect to at least one end face of the dielectric resonator 20, but not to the outer peripheral surface of the dielectric resonator 20. Among them, the second opening 221 can be exactly centered between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20, or it can be offset towards the outer peripheral surface of the dielectric resonator 20 or towards the central axis L of the dielectric resonator 20.

[0176] By adopting the above scheme, the second opening structure 22 can be conveniently used to guide and control the other electric field polarization direction of the HE mode along the second radial direction y through the second opening 221. Furthermore, the orientation of the second radial direction y can be visually determined from the end face of the dielectric resonator 20. This facilitates the design of coupling structures (e.g., second coupling structure 40, third coupling structure 70, etc.) based on the second radial direction y, and promotes the coupling structure to align with the HE mode (e.g., HE mode) along the second radial direction y. ⊥ The coupling strength and coupling effect of the module are as expected.

[0177] By adopting the above scheme, the depth direction of the second opening 221 can correspond to the axial direction of the dielectric resonator 20, which facilitates the direct thinning of a specific area of ​​the dielectric resonator 20 along its axial direction. This allows for convenient, controllable, and precise enhancement of the resonant frequencies of the HE mode and the TE mode as needed. Furthermore, since the second opening 221 is located between the outer peripheral surface of the dielectric resonator 20 and its central axis L, and does not connect to the outer peripheral surface, it does not disrupt the integrity of the outer peripheral surface. Therefore, the second opening 221 has minimal impact on the capacitance between the dielectric resonator 20 and the inner wall of the resonator housing 10, resulting in a smaller increase in the resonant frequency of the HE mode and a less significant influence on its resonant frequency. This reduces the impact of the second opening 221 on the resonant frequency of the HE mode. The second opening 221 has an excessive influence on the resonant frequency of the HE mode, which may cause the resonant frequency of the HE mode to increase abruptly. This allows for more precise control of the resonant frequency of the HE mode. That is, while increasing the resonant frequency of the HE mode, the resonant frequency of the HE mode can be increased more accurately, precisely, and stably. The resonant frequency of the HE mode can be more accurately controlled to be within the passband and close to the desired frequency band. This avoids the resonant frequency of the HE mode exceeding the passband and the desired frequency band due to the second opening 221 damaging the integrity of the outer peripheral surface of the dielectric resonator 20.

[0178] Furthermore, since the electric field of the TE mode is concentrated around the periphery of the dielectric resonator 20, the second opening 221 has the greatest impact on the resonant frequency of the TE mode when it is located on the outer periphery of the dielectric resonator 20, and the least impact when it is located on the central axis of the dielectric resonator 20. By placing the second opening 221 between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20, the second opening 221 can avoid the outer peripheral surface of the dielectric resonator 20, which can reduce the situation where the resonant frequency of the TE mode increases abruptly due to the excessive influence of the second opening 221 on the resonant frequency of the TE mode; at the same time, the second opening 221 can also avoid the central axis L of the dielectric resonator 20, which can reduce the situation where the resonant frequency of the TE mode cannot increase significantly due to the insufficient influence of the second opening 221 on the resonant frequency of the TE mode. Based on this, the resonant frequency of the TE mode can be more precisely controlled. That is, while increasing the resonant frequency of the TE mode, the resonant frequency of the TE mode can be increased more accurately, precisely, and stably. The resonant frequency of the TE mode can be controlled more precisely, which makes it easier to design the resonant frequency of the TE mode to be "within the passband and close to the same frequency band as the resonant frequency of the HE mode". It also makes it easier for the multimode resonator 1 to realize three resonant modes: single-cavity coupled HE mode and TE mode, which can improve the performance and design flexibility of the multimode resonator 1.

[0179] Furthermore, since the second opening 221 is located on the end face of the dielectric resonator 20, it is convenient to design a mold and to integrally form the dielectric resonator 20 and its second opening 221 through the mold. In particular, it can improve the demolding convenience of the mold after the dielectric resonator 20 is formed (demolding can be performed along the axial direction of the dielectric resonator 20), improve the forming convenience and forming accuracy of the dielectric resonator 20, and reduce the mold cost and the processing cost of the dielectric resonator 20.

[0180] Of course, such as Figure 10 As shown, in other embodiments, at least one second opening 221 may be formed on the outer peripheral surface of the dielectric resonator 20 and communicate with at least one end face of the dielectric resonator 20. Figure 11 As shown, in other embodiments, at least one second opening 221 may be formed on the outer peripheral surface of the dielectric resonator 20 and disposed between the two end faces of the dielectric resonator 20. Theoretically, based on the non-rotationally symmetric structure of the first opening structure 21 and the second opening structure 22 along the central axis L of the dielectric resonator 20, these two embodiments can also achieve precise guidance and control of the two electric field polarization directions of the HE mode along a preset direction. However, since the second opening 221 is formed on the outer peripheral surface of the dielectric resonator 20, the second opening 221 will disrupt the integrity of the outer peripheral surface of the dielectric resonator 20. The second opening 221 may affect the capacitance between the dielectric resonator 20 and the inner wall of the resonator housing 10, and the second opening 221 will affect the increase of the resonant frequency of the HE mode. The amplitude may be large, and the influence of the second opening 221 on the resonant frequency of the HE mode may be significant. Based on this, the resonant frequency of the HE mode may increase abruptly due to the significant influence of the second opening 221 on the resonant frequency of the HE mode. Compared with the embodiment in which "the second opening 221 is opened on the end face of the dielectric resonator 20 and is located between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20", these two embodiments are less convenient for finely controlling the resonant frequency of the HE mode. That is, it is relatively more difficult to "control the resonant frequency of the HE mode to be within the passband range and close to the desired frequency band".

[0181] It should be noted that in the three embodiments, namely, "at least one second opening 221 is opened on the end face of the dielectric resonator 20 and is located between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20", "at least one second opening 221 is opened on the outer peripheral surface of the dielectric resonator 20 and communicates with at least one end face of the dielectric resonator 20", and "at least one second opening 221 is opened on the outer peripheral surface of the dielectric resonator 20 and is located between the two end faces of the dielectric resonator 20", one of these embodiments can be selected when there is only one second opening 221; and when there are multiple second openings 221, they can be implemented individually, in pairs, or all in combination.

[0182] It should be noted that since the embodiment in which "at least one second opening 221 is opened on the end face of the dielectric resonator 20 and is located between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20" is more effective, especially in facilitating more precise control of the resonant frequency of the HE mode, this application tends to implement this embodiment alone, that is, tends to implement "all second openings 221 are opened on the end face of the dielectric resonator 20 and are located between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20".

[0183] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the first coupling structure 30 includes a fifth coupling portion 33 extending along the periphery of the first opening 211, the fifth coupling portion 33 being connected between the first coupling portion 31 and the second coupling portion 32.

[0184] It should be noted that in cases such as "at least one first opening 211 is opened on the end face of the dielectric resonator 20 and is located between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20", or "at least one first opening 211 is opened on the outer peripheral surface of the dielectric resonator 20 and connects to at least one end face of the dielectric resonator 20", the first opening 211 may connect to the end face of the dielectric resonator 20 where the first coupling structure 30 is located. Furthermore, since the electric field energy of the TE mode is stronger near the outer peripheral surface of the dielectric resonator 20, in order to facilitate the coupling of more and stronger electric field energy of the TE mode by the second coupling part 32, the second coupling part 32 may be arranged close to the outer peripheral surface of the dielectric resonator 20. This results in the intersection of the first coupling part 31 and the second coupling part 32 of the first coupling structure 30 falling into the first opening 211, causing one end of the second coupling part 32 and the end of the first coupling part 31 away from the central axis L of the dielectric resonator 20 to be spaced apart around the periphery of the first opening 211. In this case, the first coupling structure 30 may include a fifth coupling part 33, which extends along the periphery of the first opening 211. One end of the fifth coupling part 33 is connected to the end of the first coupling part 31 away from the central axis L of the dielectric resonator 20, and the other end of the fifth coupling part 33 is connected to one end of the second coupling part 32. That is, one end of the second coupling part 32 is indirectly connected to the end of the first coupling part 31 away from the central axis L of the dielectric resonator 20 through the fifth coupling part 33.

[0185] By adopting the above scheme, in the case that "the first opening 211 connects to the end face of the dielectric resonator 20 where the first coupling structure 30 is located," and "the intersection of the first coupling portion 31 and the second coupling portion 32 of the first coupling structure 30 falls into the first opening 211," the first coupling structure 30 can indirectly connect one end of the second coupling portion 32 to the end of the first coupling portion 31 away from the central axis L of the dielectric resonator 20 through the fifth coupling portion 33 extending along the periphery of the first opening 211. Based on this, the influence of the layout of the first opening 211 on the layout of the first coupling structure 30 can be reduced, and the radius of the circle where the second coupling portion 32 is located can be adjusted as needed without completely avoiding the first opening 211. This optimizes the layout of the first opening 211 and the first coupling structure 30, and improves the design flexibility and performance of the multimode resonator 1.

[0186] Of course, in other embodiments, if the first opening 211 connects to the end face of the dielectric resonator 20 where the first coupling structure 30 is located, but the first coupling structure 30 is arranged to completely avoid the first opening 211, then the first coupling structure 30 may not include the fifth coupling portion 33. In other embodiments, if the first opening 211 does not connect to the end face of the dielectric resonator 20 where the first coupling structure 30 is located, then the first coupling structure 30 may not include the fifth coupling portion 33.

[0187] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, when the multimode resonator 1 includes a second coupling structure 40, the second coupling structure 40 includes a sixth coupling portion 43 extending along the periphery of the second opening 221, and the sixth coupling portion 43 is connected between the third coupling portion 41 and the fourth coupling portion 42.

[0188] It should be noted that in cases such as "at least one second opening 221 is opened on the end face of the dielectric resonator 20 and is located between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20" or "at least one second opening 221 is opened on the outer peripheral surface of the dielectric resonator 20 and connects to at least one end face of the dielectric resonator 20", the second opening 221 may connect to the end face of the dielectric resonator 20 where the second coupling structure 40 is located. Furthermore, since the electric field energy of the TE mode is stronger near the outer peripheral surface of the dielectric resonator 20, in order to facilitate the coupling of more and stronger electric field energy of the TE mode by the fourth coupling part 42, the fourth coupling part 42 may be arranged close to the outer peripheral surface of the dielectric resonator 20. This results in the intersection of the third coupling part 41 and the fourth coupling part 42 of the second coupling structure 40 falling into the second opening 221, causing one end of the fourth coupling part 42 and the end of the third coupling part 41 away from the central axis L of the dielectric resonator 20 to be spaced apart around the periphery of the second opening 221. In this case, the second coupling structure 40 may include a sixth coupling part 43, which extends along the periphery of the second opening 221. One end of the sixth coupling part 43 is connected to the end of the third coupling part 41 away from the central axis L of the dielectric resonator 20, and the other end of the sixth coupling part 43 is connected to one end of the fourth coupling part 42. That is, one end of the fourth coupling part 42 is indirectly connected to the end of the third coupling part 41 away from the central axis L of the dielectric resonator 20 through the sixth coupling part 43.

[0189] By adopting the above scheme, in the case that "the second opening 221 connects to the end face of the dielectric resonator 20 where the second coupling structure 40 is located," and "the intersection of the third coupling portion 41 and the fourth coupling portion 42 of the second coupling structure 40 falls into the second opening 221," the second coupling structure 40 can indirectly connect one end of the fourth coupling portion 42 to the end of the third coupling portion 41 away from the central axis L of the dielectric resonator 20 through the sixth coupling portion 43 extending along the periphery of the second opening 221. Based on this, the influence of the layout of the second opening 221 on the layout of the second coupling structure 40 can be reduced, and the radius of the circle where the fourth coupling portion 42 is located can be adjusted as needed without completely avoiding the second opening 221. This optimizes the layout of the second opening 221 and the second coupling structure 40, and improves the design flexibility and performance of the multimode resonator 1.

[0190] Of course, in other embodiments, if the second opening 221 connects to the end face of the dielectric resonator 20 where the second coupling structure 40 is located, but the second coupling structure 40 is arranged to completely avoid the second opening 221, then the second coupling structure 40 may not include the sixth coupling portion 43. In other embodiments, if the second opening 221 does not connect to the end face of the dielectric resonator 20 where the second coupling structure 40 is located, then the second coupling structure 40 may not include the sixth coupling portion 43.

[0191] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the multimode resonator 1 includes a first adjustment plate 50, which is erected at the intersection of the first coupling part 31 and the second coupling part 32 of the first coupling structure 30.

[0192] It should be noted that this embodiment is applicable to any embodiment of "multimode resonator 1 including first coupling structure 30", that is, this embodiment is applicable to any of the above embodiments.

[0193] It should also be noted that the first adjustment piece 50, erected at the intersection of the first coupling part 31 and the second coupling part 32 of the first coupling structure 30, is used to adjust the HE mode (e.g., HE) along the first radial x direction of the electric field polarization direction. ∥ The coupling strength between the HE mode and the TE mode, i.e., the first adjustment piece 50 is used to adjust the electric field polarization direction along the first radial x of the HE mode (e.g., HE). ∥ The coupling amount between the HE mode and the TE mode. Based on this, the HE mode (e.g., HE) with the electric field polarization direction along the first radial x. ∥ The coupling strength between the first coupling part 30 and the TE mode can be adjusted not only by "adjusting the size of the first coupling part 31", "adjusting the size of the second coupling part 32", "adjusting the radius of the circle in which the second coupling part 32 is located", and "adjusting the distance between the first coupling structure 30 and the dielectric resonator 20 along the axial direction of the dielectric resonator 20", but also by setting up a first adjustment piece 50 at the intersection of the first coupling part 31 and the second coupling part 32 of the first coupling structure 30.

[0194] It should also be noted that the first adjusting piece 50 is erected at the intersection of the first coupling portion 31 and the second coupling portion 32 of the first coupling structure 30. This means that, based on the "erecting" position, the first adjusting piece 50 should be positioned along the axial direction of the dielectric resonator 20, corresponding to the intersection of the first coupling portion 31 and the second coupling portion 32 of the first coupling structure 30. That is, along the axial direction of the dielectric resonator 20, the first adjusting piece 50 can coincide with the intersection of the first coupling portion 31 and the second coupling portion 32, or it can be spaced apart from the intersection of the first coupling portion 31 and the second coupling portion 32. However, the first adjusting piece 50 must not be in contact with the first coupling structure 30.

[0195] It should also be noted that the first adjustment piece 50 is arranged in relation to the dielectric resonator 20 along the axial direction of the dielectric resonator 20. The first adjustment piece 50 can be arranged at intervals with the dielectric resonator 20 along the axial direction of the dielectric resonator 20. The first adjustment piece 50 can also extend into the dielectric resonator 20 (at this time, the dielectric resonator 20 should have an adjustment hole for the first adjustment piece 50 to extend into; or, when the dielectric resonator 20 has the first opening 211 mentioned above, and the intersection of the first coupling part 31 and the second coupling part 32 of the first coupling structure 30 falls into the first opening 211, the first adjustment piece 50 can also extend into the first opening 211, and the first opening 211 can be used as an adjustment hole for the first adjustment piece 50 to extend into).

[0196] The first adjusting plate 50 is a sheet-like structure. The first adjusting plate 50 can be made of metal, or it can be made by covering the surface of an insulating sheet-like structure with metal material. The first adjusting plate 50 can be rectangular, polygonal, or other shapes. Along the axial direction of the dielectric resonator 20, the first adjusting plate 50 is erected at the intersection of the first coupling portion 31 and the second coupling portion 32 of the first coupling structure 30. "Erected" means that the large surface area of ​​the first adjusting plate 50 (i.e., the surface with the largest area of ​​the first adjusting plate 50) is perpendicular to the end face of the dielectric resonator 20. The first adjusting plates 50 can be arranged in a one-to-one correspondence with the first coupling structures 30, or the number of first adjusting plates 50 can be less than the number of first coupling structures 30.

[0197] The first adjusting piece 50 is axially and rotatably connected to a wall portion (e.g., first wall 11, second wall 12) of the resonator housing 10. For example, a through hole (not shown in the figure) is provided in the corresponding wall portion. The first adjusting piece 50 is integrally or separately connected to a limiting mounting portion (not shown in the figure). The limiting mounting portion engages with the through hole in an axial limiting manner, thereby enabling the first adjusting piece 50 to be axially and rotatably connected to the wall portion of the resonator housing 10. The limiting mounting portion can be a metal part or an insulating part. The first adjusting piece 50 can be grounded based on the conductive connection between the limiting mounting portion and the resonator housing 10, or it can be insulated from the limiting mounting portion and the resonator housing 10 without being grounded.

[0198] Because the electric field polarization direction is along the first radial x, the HE mode (e.g., HE) ∥The first adjustment plate 50 can couple with the TE mode on the first coupling structure 30. Therefore, by adopting the above scheme, the orientation of the first adjustment plate 50, the angle between the large surface of the first adjustment plate 50 and the first radial direction x, and the angle between the large surface of the first adjustment plate 50 and the circumferential direction of the dielectric resonator 20 can be adjusted by rotating the first adjustment plate 50 erected at the intersection of the first coupling part 31 and the second coupling part 32. This allows for adjustment of the coupling amount of the electric field of the first adjustment plate 50 to the TE mode, as well as the coupling amount of the HE mode (e.g., HE) with the electric field polarization direction along the first radial direction x. ∥ The coupling amount of the electric field of the HE mode (e.g., HE mode) is adjusted so that the electric field polarization direction along the first radial x can be adjusted. ∥ The coupling strength between the first coupling structure 30 and the second coupling structure 32 is easily, quickly, and precisely adjusted. Especially after the first coupling structure 30 has been formed or installed in the multimode resonator 1, the dimensions of the first coupling part 31, the second coupling part 32, the radius of the circle containing the second coupling part 32, and the distance between the first coupling structure 30 and the dielectric resonator 20 along the axial direction of the dielectric resonator 20 are all fixed or difficult to change. In such cases, the first adjusting piece 50 can be used to adjust the electric field polarization direction along the first radial x of the HE mode (e.g., HE...). ∥ The coupling amount between the TE mode and the TE mode is reduced, thereby ensuring the stable performance of the multimode resonator 1 and facilitating the optimization of the multimode resonator 1's specifications and parameters.

[0199] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, based on the previous embodiment, and in the case where the dielectric resonator 20 is provided with the first opening 211 mentioned above, and the intersection of the first coupling portion 31 and the second coupling portion 32 of the first coupling structure 30 falls into the first opening 211, at least a portion of the first adjustment piece 50 is inserted into the first opening 211.

[0200] It should be noted that when "the first opening 211 is connected to the end face of the dielectric resonator 20 where the first coupling structure 30 is located", and "the intersection of the first coupling part 31 and the second coupling part 32 of the first coupling structure 30 falls into the first opening 211", the first adjustment piece 50 corresponding to the first coupling structure 30 will be positioned in the first opening 211. In this case, part or all of the first adjustment piece 50 can be inserted into the first opening 211.

[0201] Because the electric field polarization direction is along the first radial x, the HE mode (e.g., HE) ∥The electric and magnetic fields of the first mode (TE mode) and the second mode (TE mode) are mainly concentrated within the dielectric resonator 20. Therefore, by adopting the above scheme, when the intersection of the first coupling part 31 and the second coupling part 32 of the first coupling structure 30 falls into the first opening 211, the first adjustment piece 50 corresponding to the first coupling structure 30 is inserted into the first opening 211 so that the first adjustment piece 50 coincides (fully or partially coincides) with the intersection of the first coupling part 31 and the second coupling part 32. This allows the first adjustment piece 50 to couple to more electric fields and cut to more magnetic fields through the part inserted into the first opening 211, thereby optimizing the coupling adjustment effect of the first adjustment piece 50 and improving the performance of the multimode resonator 1.

[0202] For example, such as Figure 3 , Figure 4 As shown, in a specific example of the multimode resonator 1, a first opening 211 is formed on the end face of the dielectric resonator 20 and extends through the dielectric resonator 20. The first opening 211 is located between the central axis L of the dielectric resonator 20 and the outer peripheral surface of the dielectric resonator 20. Two first openings 211 are provided, and the two first openings 211 are arranged symmetrically about the central axis L of the dielectric resonator 20. Two first coupling structures 30 are also provided, and the two first coupling structures 30 are arranged symmetrically about the second radial direction y. The intersection of the first coupling part 31 and the second coupling part 32 of the two first coupling structures 30 falls into the two first openings 211 respectively. Two first adjustment plates 50 are also provided, and the two first adjustment plates 50 are respectively inserted into the two first openings 211. Based on this, the HE mode (e.g., HE) with the electric field polarization direction along the first radial direction x can be achieved through the two first coupling structures 30. ∥ The HE mode (e.g., HE) and the TE mode are coupled to each other, and the electric field polarization direction along the first radial x can be adjusted by two first adjustment plates 50. ∥ The coupling strength between the TE mode and the TE mode is relatively high, and the total adjustment of the two first regulating plates 50 is quite large, reaching about 9M (megawatts). Of course, one of the two first regulating plates 50 can be omitted, in which case the adjustment of one first regulating plate 50 is about 5M.

[0203] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, when the multimode resonator 1 includes a second coupling structure 40, the multimode resonator 1 includes a second adjustment piece 60, which is erected at the intersection of the third coupling portion 41 and the fourth coupling portion 42 of the second coupling structure 40.

[0204] It should be noted that this embodiment applies to any embodiment of "multimode resonator 1 including second coupling structure 40".

[0205] It should also be noted that the second adjustment piece 60, erected at the intersection of the third coupling part 41 and the fourth coupling part 42 of the second coupling structure 40, is used to adjust the HE mode (e.g., HE) along the second radial direction y of the electric field polarization direction. ⊥ The coupling strength between the HE mode and the TE mode, i.e., the second adjustment plate 60 is used to adjust the electric field polarization direction along the second radial direction y of the HE mode (e.g., HE). ⊥ The coupling amount between the HE mode and the TE mode. Based on this, the HE mode (e.g., HE) with the electric field polarization direction along the second radial y. ⊥ The coupling strength between the second coupling structure 40 and the TE mode can be adjusted not only by "adjusting the size of the third coupling part 41", "adjusting the size of the fourth coupling part 42", "adjusting the radius of the circle in which the fourth coupling part 42 is located", and "adjusting the distance between the second coupling structure 40 and the dielectric resonator 20 along the axial direction of the dielectric resonator 20", but also by setting a second adjustment piece 60 at the intersection of the third coupling part 41 and the fourth coupling part 42 of the second coupling structure 40.

[0206] It should also be noted that the second adjusting piece 60 is erected at the intersection of the third coupling portion 41 and the fourth coupling portion 42 of the second coupling structure 40. This means that, based on the "erecting" position, along the axial direction of the dielectric resonator 20, the position of the second adjusting piece 60 should correspond to the intersection of the third coupling portion 41 and the fourth coupling portion 42 of the second coupling structure 40. That is, along the axial direction of the dielectric resonator 20, the second adjusting piece 60 can coincide with the intersection of the third coupling portion 41 and the fourth coupling portion 42, or it can be spaced apart from the intersection of the third coupling portion 41 and the fourth coupling portion 42. However, the second adjusting piece 60 must not be in contact with the second coupling structure 40.

[0207] It should also be noted that the second adjustment piece 60 is arranged in relation to the dielectric resonator 20 along the axial direction of the dielectric resonator 20. The second adjustment piece 60 can be arranged at intervals with the dielectric resonator 20 along the axial direction of the dielectric resonator 20. The second adjustment piece 60 can also extend into the dielectric resonator 20 (at this time, the dielectric resonator 20 should have an adjustment hole for the second adjustment piece 60 to extend into; or, when the dielectric resonator 20 has the second opening 221 mentioned above, and the intersection of the third coupling part 41 and the fourth coupling part 42 of the second coupling structure 40 falls into the second opening 221, the second adjustment piece 60 can also extend into the second opening 221, and the second opening 221 can be used as an adjustment hole for the second adjustment piece 60 to extend into).

[0208] The second adjusting plate 60 is a sheet-like structure. It can be made of metal, or it can be made by covering the surface of an insulating sheet-like structure with metal. The second adjusting plate 60 can be rectangular, polygonal, or other shapes. Along the axial direction of the dielectric resonator 20, the second adjusting plate 60 is erected at the intersection of the third coupling portion 41 and the fourth coupling portion 42 of the second coupling structure 40. "Erected" means that the larger surface area of ​​the second adjusting plate 60 (i.e., the surface with the largest area of ​​the second adjusting plate 60) is perpendicular to the end face of the dielectric resonator 20. The second adjusting plates 60 can be arranged in a one-to-one correspondence with the second coupling structures 40, or the number of second adjusting plates 60 can be less than the number of second coupling structures 40.

[0209] The second adjusting piece 60 is axially and rotatably connected to a wall portion (e.g., the first wall 11, the second wall 12) of the resonator housing 10. For example, a through hole (not shown in the figure) is provided in the corresponding wall portion. The second adjusting piece 60 is integrally or separately connected to a limiting mounting portion (not shown in the figure). The limiting mounting portion engages with the through hole in an axial limiting manner, thereby enabling the second adjusting piece 60 to be axially and rotatably connected to the wall portion of the resonator housing 10. The limiting mounting portion can be a metal part or an insulating part. The second adjusting piece 60 can be grounded based on the conductive connection between the limiting mounting portion and the resonator housing 10, or it can be insulated from the limiting mounting portion and the resonator housing 10 without being grounded.

[0210] Because the electric field polarization direction is along the second radial y-mode (e.g., HE mode) ⊥ The TE mode and the HE mode can be coupled on the second coupling structure 40. Therefore, by adopting the above scheme, the orientation of the second adjusting plate 60, the angle between the large surface of the second adjusting plate 60 and the second radial direction y, and the angle between the large surface of the second adjusting plate 60 and the circumferential direction of the dielectric resonator 20 can be adjusted by rotating the second adjusting plate 60 erected at the intersection of the third coupling part 41 and the fourth coupling part 42. This allows for adjustment of the coupling amount of the electric field of the second adjusting plate 60 to the TE mode, as well as the coupling amount of the HE mode (e.g., HE) with the electric field polarization direction along the second radial direction y. ⊥ The coupling amount of the electric field of the HE mode (e.g., HE) is adjusted so that the electric field polarization direction along the second radial y can be adjusted. ⊥ The coupling strength between the second coupling structure 40 and the third coupling structure 41 and the fourth coupling structure 42 is easily, quickly, and precisely adjusted. Especially after the second coupling structure 40 has been formed or installed in the multimode resonator 1, the dimensions of the third coupling section 41, the fourth coupling section 42, the radius of the circle containing the fourth coupling section 42, and the distance between the second coupling structure 40 and the dielectric resonator 20 along the axial direction of the dielectric resonator 20 can be adjusted using the second adjustment plate 60. ⊥The coupling amount between the TE mode and the TE mode is reduced, thereby ensuring the stable performance of the multimode resonator 1 and facilitating the optimization of the multimode resonator 1's specifications and parameters.

[0211] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, based on the previous embodiment, and in the case where the dielectric resonator 20 is provided with the second opening 221 mentioned above, and the intersection of the third coupling portion 41 and the fourth coupling portion 42 of the second coupling structure 40 falls into the second opening 221, at least a portion of the second adjustment piece 60 is inserted into the second opening 221.

[0212] It should be noted that when "the second opening 221 is connected to the end face of the dielectric resonator 20 where the second coupling structure 40 is located", and "the intersection of the third coupling part 41 and the fourth coupling part 42 of the second coupling structure 40 falls into the second opening 221", the second adjustment piece 60 corresponding to the second coupling structure 40 will be positioned in the second opening 221. In this case, part or all of the second adjustment piece 60 can be inserted into the second opening 221.

[0213] Because the electric field polarization direction is along the second radial y-mode (e.g., HE mode) ⊥ The electric and magnetic fields of the first mode (TE mode) and the second mode (TE mode) are mainly concentrated within the dielectric resonator 20. Therefore, by adopting the above scheme, when the intersection of the third coupling part 41 and the fourth coupling part 42 of the second coupling structure 40 falls into the second opening 221, the second adjustment piece 60 corresponding to the second coupling structure 40 is inserted into the second opening 221 so that the second adjustment piece 60 coincides (fully or partially coincides) with the intersection of the third coupling part 41 and the fourth coupling part 42. This allows the second adjustment piece 60 to couple to more electric fields and cut to more magnetic fields through the part inserted into the second opening 221, thereby optimizing the coupling adjustment effect of the second adjustment piece 60 and improving the performance of the multimode resonator 1.

[0214] For example, such as Figure 3 , Figure 4As shown, in a specific example of the multimode resonator 1, a second opening 221 is formed on the end face of the dielectric resonator 20 and extends through the dielectric resonator 20. The second opening 221 is located between the central axis L of the dielectric resonator 20 and the outer peripheral surface of the dielectric resonator 20. Two second openings 221 are provided, and the two second openings 221 are arranged symmetrically about the central axis L of the dielectric resonator 20. Two second coupling structures 40 are also provided, and the two second coupling structures 40 are arranged symmetrically about the first radial direction x. The intersection of the third coupling part 41 and the fourth coupling part 42 of the two second coupling structures 40 falls into the two second openings 221 respectively. Two second adjustment plates 60 are also provided, and the two second adjustment plates 60 are respectively inserted into the two second openings 221. Based on this, the HE mode (e.g., HE) with the electric field polarization direction along the second radial direction y can be achieved through the two second coupling structures 40. ⊥ The HE mode (e.g., HE) and the TE mode are coupled to each other, and the electric field polarization direction along the second radial direction y can be adjusted by two second adjustment plates 60. ⊥ The coupling strength between the TE mode and the TE mode is relatively high, and the total adjustment of the two second regulating plates 60 is quite large, reaching about 9M (megawatts). Of course, one of the two second regulating plates 60 can be omitted, in which case the adjustment of one second regulating plate 60 is about 5M.

[0215] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the multimode resonator 1 includes a third coupling structure 70, which is disposed on the end side of the dielectric resonator 20 and intersects perpendicularly with the central axis L of the dielectric resonator 20. The third coupling structure 70 is set at an angle to the first radial x and at an angle to the second radial y, so as to enable HE dual-mode coupling.

[0216] It should be noted that the third coupling structure 70 is disposed on the end side of the dielectric resonator 20, that is, the third coupling structure 70 can be disposed on the end side of the dielectric resonator 20 facing the first wall 11, or it can be disposed on the end side of the dielectric resonator 20 away from the first wall 11. The third coupling structure 70, the first coupling structure 30, and the second coupling structure 40 can all be disposed on the same end side of the dielectric resonator 20, or they can be disposed on two different end sides of the dielectric resonator 20.

[0217] The third coupling structure 70 intersects perpendicularly with the central axis L of the dielectric resonator 20, such that the third coupling structure 70 is parallel to the plane jointly defined by the first radial direction x and the second radial direction y. The third coupling structure 70 can be arranged in a straight line (e.g., Figure 3 , Figure 4 (As shown), it can also be extended by curves or by bends.

[0218] The third coupling structure 70 is set at an angle to the first radial direction x and at an angle to the second radial direction y. Therefore, the third coupling structure 70 can couple the HE mode (e.g., HE) with the electric field polarization direction along the first radial direction x. ∥ The electric field energy of the mode can be coupled to the HE mode (e.g., HE mode) whose electric field polarization direction is along the second radial direction y. ⊥ The electric field energy of the HE dual-mode (e.g., HE mode) can be used to enable the HE dual-mode (e.g., HE mode) to achieve the desired electric field energy. ∥ Model and HE ⊥ The modes are coupled to each other. That is, HE dual-mode (e.g., HE) ∥ Model and HE ⊥ The module can be coupled to the third coupling structure 70.

[0219] The coupling strength and effect between the third coupling structure 70 and the HE dual-mode can be adjusted by changing the dimensions of the third coupling structure 70. The dimensions of the third coupling structure 70 include its length, width, and height. The length of the third coupling structure 70 is its radial dimension along the dielectric resonator 20; the height of the third coupling structure 70 is its axial dimension along the dielectric resonator 20; and the width of the third coupling structure 70 is its dimension in the direction perpendicular to its length and height directions. The larger the dimensions of the third coupling structure 70 (i.e., the larger any of its length, width, and height), the stronger the coupling strength and the better the coupling effect between the third coupling structure 70 and the HE dual-mode.

[0220] In the case where the third coupling structure 70 is located on the end side of the dielectric resonator 20 facing the first wall 11, the third coupling structure 70 can abut against the end face of the dielectric resonator 20 facing the first wall 11, or abut against the first wall 11, or be spaced between the end face of the dielectric resonator 20 facing the first wall 11 and the first wall 11. In the case where the third coupling structure 70 is located on the end side of the dielectric resonator 20 facing away from the first wall 11, the third coupling structure 70 can abut against the end face of the dielectric resonator 20 facing away from the first wall 11, or abut against the second wall 12 of the resonator housing 10 opposite to the first wall 11 (e.g., ...). Figure 1 As shown, the coupling structure 70 can also be spaced between the end face of the dielectric resonator 20 facing away from the first wall 11 and the second wall 12. Based on this, the coupling strength and coupling effect between the third coupling structure 70 and the HE dual-mode can be adjusted by adjusting the "distance between the third coupling structure 70 and the dielectric resonator 20 along the axial direction of the dielectric resonator 20". Specifically, the smaller the distance between the third coupling structure 70 and the dielectric resonator 20 along the axial direction of the dielectric resonator 20, the stronger the coupling strength and the better the coupling effect between the third coupling structure 70 and the HE dual-mode. Therefore, when the third coupling structure 70 abuts against the end face of the dielectric resonator 20, the coupling strength between the third coupling structure 70 and the HE dual-mode is stronger and the coupling effect is better.

[0221] Since the first radial direction x and the second radial direction y form a 90° angle, the sum of the angle between the third coupling structure 70 and the first radial direction x and the angle between the third coupling structure 70 and the second radial direction y is 90°. Based on this, the coupling strength and coupling effect between the third coupling structure 70 and the HE dual-mode can be adjusted by adjusting the angle between the third coupling structure 70 and the first radial direction x and the angle between the third coupling structure 70 and the second radial direction y. Specifically, if the angle between the third coupling structure 70 and the first radial direction x is less than the angle between the third coupling structure 70 and the second radial direction y, then the coupling strength and coupling effect between the third coupling structure 70 and the HE mode (e.g., HE mode) with the electric field polarization direction along the first radial direction x are greater than the angle between the third coupling structure 70 and the second radial direction y. ∥ The coupling strength and coupling effect of the third coupling structure 70 with the HE mode (e.g., HE mode) whose electric field polarization direction is along the second radial direction y is better than that of the third coupling structure 70. ⊥ The coupling strength and coupling effect of the third coupling structure 70 (e.g., HE mode) along the first radial x direction. If the angle between the third coupling structure 70 and the first radial x direction is greater than the angle between the third coupling structure 70 and the second radial y direction, then the coupling strength and coupling effect of the third coupling structure 70 and the HE mode (e.g., HE mode) along the first radial x direction are considered. ∥ The coupling strength and coupling effect of the third coupling structure 70 with the HE mode (e.g., HE mode) whose electric field polarization direction is along the second radial direction y is inferior to those of the third coupling structure 70. ⊥ The coupling strength and coupling effect of the third coupling structure 70 (e.g., HE mode) along the electric field polarization direction along the first radial x. If the angle between the third coupling structure 70 and the first radial x is equal to the angle between the third coupling structure 70 and the second radial y, then the coupling strength and coupling effect of the third coupling structure 70 and the HE mode (e.g., HE mode) along the electric field polarization direction along the first radial x are equal. ∥ The coupling strength and coupling effect of the third coupling structure 70 are balanced with the HE mode (e.g., HE) whose electric field polarization direction is along the second radial direction y. ⊥ The coupling strength and coupling effect of the third coupling structure 70 with the first radial x-axis. That is, the smaller the angle between the third coupling structure 70 and the first radial x-axis, the stronger the coupling between the third coupling structure 70 and the HE mode (e.g., HE mode) whose electric field polarization direction is along the first radial x-axis. ∥ The stronger the coupling strength of the third coupling structure 70 and the second radial direction y, the better the coupling effect. The smaller the angle between the third coupling structure 70 and the HE mode (e.g., HE mode) whose electric field polarization direction is along the second radial direction y, the better the coupling effect. ⊥ The stronger the coupling strength of the modules, the better the coupling effect.

[0222] In this configuration, one end of the third coupling structure 70 may be located at the central axis L of the dielectric resonator 20, while the other end is spaced apart from the central axis L of the dielectric resonator 20, such that the entire third coupling structure 70 is located on one side of the central axis L of the dielectric resonator 20. Alternatively, the two ends of the third coupling structure 70 may be located on opposite sides of the central axis L of the dielectric resonator 20. In this case, the midpoint of the third coupling structure 70 may coincide with or be spaced apart from the central axis L of the dielectric resonator 20. Figure 4 As shown, in some embodiments, the third coupling structure 70 is symmetrically arranged about the central axis L of the dielectric resonator 20, that is, the two parts of the third coupling structure 70 located on both sides of the central axis of the dielectric resonator 20 are symmetrically arranged, and the midpoint of the third coupling structure 70 is located at the central axis L of the dielectric resonator 20.

[0223] The third coupling structure 70 may be made of a metallic material, or it may be made by covering the surface of the insulating structure with a metallic material. The metallic material used in the third coupling structure 70 may be, but is not limited to, silver, copper, gold, nickel, alloys, etc.

[0224] The third coupling structure 70 can be formed independently relative to the dielectric resonator 20 and the resonator housing 10, or it can be integrally connected to the end face of the dielectric resonator 20, or it can be integrally connected to the wall portion (e.g., the first wall 11 or the second wall 12) of the resonator housing 10. The third coupling structure 70 can be grounded to the wall portion (e.g., the first wall 11 or the second wall 12) of the resonator housing 10, or it can be ungrounded.

[0225] By adopting the above scheme, the third coupling structure 70, located at the end of the dielectric resonator 20, is set at an angle to the first radial direction x and at an angle to the second radial direction y. Based on this, the HE mode (e.g., HE) with the electric field polarization direction along the first radial direction x can be coupled via the third coupling structure 70. ∥ The electric field energy of the mode, coupled with the electric field polarization direction along the second radial y of the HE mode (e.g., HE). ⊥ The electric field energy of the HE dual-mode (e.g., HE mode) can be used to enable the HE dual-mode (e.g., HE mode) to achieve the desired electric field energy. ∥ Model and HE ⊥ The mode can be coupled to the third coupling structure 70. Thus, the multimode resonator 1 can, through the simplified and optimized third coupling structure 70, enable HE dual-mode (e.g., HE) coupling. ∥ Model and HE ⊥ The coupling is achieved through the mode, resulting in better coupling effect. It also facilitates the construction of cascaded coupling relationships and cross-coupling relationships for the three modes (HE dual-mode and TE mode) as needed to form transmission zeros. This allows for optimization of the structural design, coupling design, and overall performance (especially out-of-band suppression performance) of the multimode resonator 1, and facilitates the simulation design of the multimode resonator 1.

[0226] Of course, in other embodiments, where no coupling is required between the HE dual modes, the third coupling structure 70 can be omitted.

[0227] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the third coupling structure 70 is a rib.

[0228] By adopting the above scheme, and by making the third coupling structure 70 a rib, it is convenient to separately form the third coupling structure 70 onto the dielectric resonator 20, and it is also convenient to separately form or integrally form the third coupling structure 70 onto the wall of the resonator housing 10 (e.g., the first wall 11 or...). Figure 1 The second wall 12 shown facilitates the processing, forming, connection, and fixing of the third coupling structure 70, thereby improving the processing convenience, processing efficiency, structural reliability, and structural strength of the third coupling structure 70.

[0229] Furthermore, the structural form of the third coupling structure 70 can be simplified, allowing it to be rib-like and possessing a regular and clearly defined length, width, and height. Based on this, the third coupling structure 70 can be easily tilted relative to the first radial x and second radial y, respectively. This allows for adjustments to the coupling strength and effect between the third coupling structure 70 and the HE dual-mode by modifying the length, width, and height of the third coupling structure 70, the spacing between the third coupling structure 70 and the dielectric resonator 20 along the axial direction of the dielectric resonator 20, the angle between the third coupling structure 70 and the first radial x, and the angle between the third coupling structure 70 and the second radial y. This improves the design flexibility and performance of the multimode resonator 1.

[0230] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the third coupling structure 70 is disposed between the dielectric resonator 20 and the first wall 11.

[0231] When the third coupling structure 70 is a rib, it will occupy a certain amount of space. Based on this, by adopting the above scheme, and by placing the third coupling structure 70 between the dielectric resonator 20 and the first wall 11, the end of the dielectric resonator 20 facing away from the first wall 11 can be placed between the second wall 12 of the resonator housing 10, freeing up more space for the installation of the debugging structure (such as the metal disk 80 mentioned below). This optimizes and compacts the structural layout of the multimode resonator 1, improves the design flexibility of the multimode resonator 1, and facilitates the miniaturization of the multimode resonator 1.

[0232] Of course, in other embodiments, the third coupling structure 70 may be disposed on the end side of the dielectric resonator 20 facing away from the first wall 11 to the second wall 12 (e.g. Figure 1 (as shown) between.

[0233] Please refer to Figure 4 In some embodiments of this application, the third coupling structure 70 is metallized on the end face of the dielectric resonator 20. That is, the third coupling structure 70 is a metal layer, and the third coupling structure 70 is directly metallized on the end face of the dielectric resonator 20. The metallization method may include, but is not limited to, electroplating, sputtering coating, chemical vapor deposition (CVD), physical vapor deposition (PVD), laser cladding, metal injection molding (MIM), etc. The metal material used for the third coupling structure 70 may be, but is not limited to, silver, copper, gold, nickel, alloys, etc.

[0234] By adopting the above scheme, the third coupling structure 70 can be directly metallized on the end face of the dielectric resonator 20. This facilitates the processing and forming of the third coupling structure 70, simplifies the assembly process between the third coupling structure 70 and the dielectric resonator 20, and improves the processing convenience, efficiency, and accuracy of the third coupling structure 70, thereby enhancing the assembly convenience and efficiency of the multimode resonator 1. Furthermore, during the forming of the third coupling structure 70, its length, width, and height are precisely and stably determined, as are the angles between the third coupling structure 70 and the first radial direction x, and the angles between the third coupling structure 70 and the second radial direction y. The third coupling structure 70 stably and reliably abuts against the end face of the dielectric resonator 20. This optimizes and stabilizes the coupling strength and effect between the third coupling structure 70 and the HE dual-mode, resulting in stronger coupling and better coupling effect, thus optimizing the performance of the multimode resonator 1. Furthermore, the third coupling structure 70 can essentially share space with the dielectric resonator 20 without requiring additional space. Therefore, regardless of whether the third coupling structure 70 is located on the dielectric resonator 20 facing the first wall 11 (e.g., ...), Figure 2 Whether the end of the dielectric resonator 20 is located on the side opposite to the first wall 11, or on the side of the dielectric resonator 20 facing away from the first wall 11, sufficient space can be provided between the dielectric resonator 20 and the resonator housing 10 for the installation of the debugging structure (e.g., Figure 2 The metal disk 80 shown can be used to optimize and compact the structural layout of the multimode resonator 1, which is beneficial for the miniaturization of the multimode resonator 1.

[0235] Of course, in other embodiments, the third coupling structure 70 can also be a metal sheet, which can be fixed to the end face of the dielectric resonator 20 by means of bonding, welding, fastener connection, etc.; the metal sheet can also be fixed to the first wall 11 or the second wall 12 at intervals by support members. In this case, the metal sheet can abut against the end face of the dielectric resonator 20, or the metal sheet can be spaced between the end face of the dielectric resonator 20 and the first wall 11 (or the second wall 12).

[0236] Please see Figure 3 , Figure 4 In some embodiments of this application, the third coupling structure 70 forms a 45° angle with the first radial x and a 45° angle with the second radial y.

[0237] By adopting the above scheme, the angle between the third coupling structure 70 and the first radial x can be made equal to the angle between the third coupling structure 70 and the second radial y, both being 45°. Based on this, the HE mode (e.g., HE) along the electric field polarization direction of the third coupling structure 70 and the first radial x can be made equal to the angle between the third coupling structure 70 and the second radial y. ∥ The coupling strength and coupling effect of the third coupling structure 70 are balanced with the HE mode (e.g., HE) whose electric field polarization direction is along the second radial direction y. ⊥ The coupling strength and coupling effect of the third coupling structure 70 and HE dual mode can be optimized, thereby optimizing the coupling design and overall performance of the multimode resonator 1.

[0238] Of course, in other embodiments, the sum of the angle between the third coupling structure 70 and the first radial x and the angle between the third coupling structure 70 and the second radial y is 90°, and the angle between the third coupling structure 70 and the first radial x and the angle between the third coupling structure 70 and the second radial y are set differently.

[0239] Please see Figure 4 , Figure 12 In some embodiments of this application, the third coupling structure 70 is rotated 90° around the central axis L of the dielectric resonator 20 to change the coupling polarity between the HE dual modes.

[0240] It should be noted that, with Figure 4 Compared to the third coupling structure 70 shown, Figure 12The third coupling structure 70 shown is rotated 90° around the central axis L of the dielectric resonator 20, reversing its orientation and the direction of the current obtained by the coupling electric field energy through the third coupling structure 70. This reverses the coupling polarity achieved by the third coupling structure 70, i.e., reverses the coupling polarity between the HE dual modes. Specifically, the coupling polarity reversal is the reversal of the positive and negative values ​​of the coupling coefficient between the HE dual modes, i.e., the reversal between positive and negative coupling.

[0241] By adopting the above scheme, the third coupling structure 70 can be rotated 90° around the central axis L of the dielectric resonator 20 to reverse the direction of the current obtained by the coupling electric field energy of the third coupling structure 70, thereby reversing the coupling polarity between the HE dual modes between positive and negative coupling. This facilitates the on-demand change of the coupling polarity between the HE dual modes, simplifying the coupling design and simulation design of the multimode resonator 1, and improving the design flexibility and performance of the multimode resonator 1.

[0242] Please see Figure 1 , Figure 13 In some embodiments of this application, the multimode resonator 1 includes a coupling adjustment screw 120, which is threaded to the resonator housing 10 and located in the extension direction of the third coupling structure 70.

[0243] It should be noted that the coupling adjustment screw 120, located in the extension direction of the third coupling structure 70, is used to adjust the coupling strength and coupling effect between the third coupling structure 70 and the HE dual-mode. That is, the coupling adjustment screw 120 is used to adjust the HE dual-mode (e.g., HE...) ∥ Model and HE ⊥ The coupling amount between the third coupling structure 70 and the HE dual-mode. Based on this, the coupling strength and coupling effect between the third coupling structure 70 and the HE dual-mode can be adjusted not only by "adjusting the size of the third coupling structure 70", "adjusting the distance between the third coupling structure 70 and the dielectric resonator 20 along the axial direction of the dielectric resonator 20", "adjusting the angle between the third coupling structure 70 and the first radial x", and "adjusting the angle between the third coupling structure 70 and the second radial y", but also by setting a coupling adjustment screw 120 in the extension direction of the third coupling structure 70.

[0244] The coupling adjustment screw 120 may be provided in one or more ways. The coupling adjustment screw 120 may be threadedly connected to any wall portion of the resonator housing 10 (e.g., the first wall 11, the second wall 12 opposite to the first wall 11, or the side wall 13 connecting the first wall 11 and the second wall 12). The coupling adjustment screw 120 may be directly threadedly connected to a threaded hole in the corresponding wall portion; alternatively, a fitting (not shown) may be embedded in the corresponding wall portion, and the coupling adjustment screw 120 may be threadedly connected to the threaded hole of the fitting. The coupling adjustment screw 120 may be grounded based on its conductive connection to the resonator housing 10; or it may be ungrounded based on its insulated connection to the resonator housing 10.

[0245] Based on the fact that the coupling adjustment screw 120 is located in the extending direction of the third coupling structure 70, the specific position of the coupling adjustment screw 120 relative to the dielectric resonator 20 can be flexibly set. In some embodiments, the coupling adjustment screw 120 may be located on the periphery of the dielectric resonator 20 along the extending direction of the third coupling structure 70; in this case, when there are multiple coupling adjustment screws 120, the multiple coupling adjustment screws 120 may be located only on the same side of the dielectric resonator 20 along the extending direction of the third coupling structure 70, or they may be located on opposite sides of the dielectric resonator 20 along the extending direction of the third coupling structure 70. In other embodiments, the coupling adjustment screw 120 may be correspondingly arranged with the dielectric resonator 20 along the axial direction of the dielectric resonator 20; in this case, the coupling adjustment screw 120 may be spaced apart from the dielectric resonator 20 along the axial direction of the dielectric resonator 20, and the coupling adjustment screw 120 may also extend into the dielectric resonator 20 (in this case, the dielectric resonator 20 should have a clearance hole for the coupling adjustment screw 120 to extend into).

[0246] By adopting the above scheme, the length of the portion of the coupling adjusting screw 120 extending into the resonator housing 10 can be conveniently and quickly adjusted by screwing the coupling adjusting screw 120 in or out. Based on this, the length of the portion of the coupling adjusting screw 120 extending into the resonator housing 10 can be adjusted to control the HE dual-mode (e.g., HE) signal. ∥ Model and HE ⊥ The coupling amount between the two modes is convenient, quick, and precise. Especially after the third coupling structure 70 has been formed or installed in the multimode resonator 1, the values ​​of "the dimensions of the third coupling structure 70," "the distance between the third coupling structure 70 and the dielectric resonator 20 along the axial direction of the dielectric resonator 20," "the angle between the third coupling structure 70 and the first radial x," and "the angle between the third coupling structure 70 and the second radial y" are fixed or inconvenient to change. In such cases, the coupling adjustment screw 120 can be used to adjust the coupling amount between the HE dual modes (e.g., HE...). ∥ Model and HE ⊥The coupling amount between modes is reduced, thereby ensuring the stable performance of the multimode resonator 1 and facilitating the optimization of the multimode resonator 1's specifications and parameters.

[0247] The longer the length of the coupling adjustment screw 120 extending into the resonator housing 10, the greater the coupling between the HE dual modes; conversely, the shorter the length of the coupling adjustment screw 120 extending into the resonator housing 10, the smaller the coupling between the HE dual modes.

[0248] Please see Figure 2 , Figure 3 , Figure 9 In some embodiments of this application, the dielectric resonator 20 includes a dielectric body 23 and a dielectric cylinder 24, wherein the dielectric cylinder 24 is erected on the end side of the dielectric body 23 and surrounds the periphery of the dielectric body 23.

[0249] It should be noted that the dielectric resonator 20 includes a dielectric body 23 and a dielectric cylinder 24. The first opening 211 mentioned above can be provided in the dielectric body 23 or the dielectric cylinder 24 as needed. The second opening 221 mentioned above can be provided in the dielectric body 23 or the dielectric cylinder 24 as needed.

[0250] The dielectric body 23 is the part of the dielectric resonator 20 that mainly influences and determines the resonant frequency of the TE mode. For example... Figure 7 As shown, since the electric field of the TE mode is distributed in a horizontal (i.e., parallel to the first wall 11) ring shape and the magnetic field is distributed in a vertical (i.e., perpendicular to the first wall 11) ring shape, the electric field of the TE mode will be concentrated in the center of the resonant cavity and form a ring. Therefore, the resonant frequency of the TE mode can be influenced and determined by the dielectric body 23, which is basically located at the center of the resonant cavity. Specifically, the resonant frequency of the TE mode can be adjusted by adjusting the radial dimension and height (i.e., the dimension along the axial direction of the dielectric body 23, also known as the thickness) of the dielectric body 23, and can also be adjusted by adjusting the size of the resonant cavity. Among them, the larger the radial dimension of the dielectric body 23, the lower the resonant frequency of the TE mode; the smaller the radial dimension of the dielectric body 23, the higher the resonant frequency of the TE mode. The larger the height of the dielectric body 23, the lower the resonant frequency of the TE mode; the smaller the height of the dielectric body 23, the higher the resonant frequency of the TE mode. The medium body 23 may be, but is not limited to, disc-shaped, columnar, block-shaped, etc. The cross-sectional shape of the medium body 23 perpendicular to its axis may be, but is not limited to, circular, rectangular, square, polygonal, petal-shaped, cross-shaped, etc. The cross-sectional shape of the medium body 23 parallel to its axis may be, but is not limited to, circular, rectangular, square, polygonal, petal-shaped, cross-shaped, etc. For example, such as... Figure 2 As shown, in some embodiments, the medium body 23 is cylindrical or prismatic.

[0251] The dielectric cylinder 24 is the part of the dielectric resonator 20 mainly used to lower the resonant frequency of the HE mode. There may be one or two dielectric cylinders 24. When there is one dielectric cylinder 24, it can be erected on the end of the dielectric body 23 facing the first wall 11, or it can be erected on the end of the dielectric body 23 facing away from the first wall 11. Figure 2 , Figure 9 As shown, when two dielectric cylinders 24 are provided, one dielectric cylinder 24 can be erected on the end side of the dielectric body 23 facing the first wall 11, and the other dielectric cylinder 24 can be erected on the end side of the dielectric body 23 facing away from the first wall 11. The dielectric cylinders 24 are cylindrical and surround the periphery of the dielectric body 23. Since the addition of dielectric cylinders 24 increases the capacitance between the outer peripheral wall of the dielectric resonator 20 and the inner wall of the resonator housing 10, the arrangement of dielectric cylinders 24 can lower the resonant frequency of the HE mode. The greater the sum of the heights of all dielectric cylinders 24 (i.e., the dimension along the axial direction of the dielectric resonator 20), the lower the resonant frequency of the HE mode.

[0252] Based on this, by adopting the above scheme, the resonant frequency of the TE mode can be adjusted by changing the size of the resonant cavity, the radial dimension and height of the dielectric body 23, so as to tune the resonant frequency of the TE mode to near the center frequency of the passband. One or two dielectric cylinders 24 can be added to lower the resonant frequency of the HE mode, thereby tuning the resonant frequency of the HE mode to near the center frequency of the passband. This allows the resonant frequency of the HE mode to approach and be close to the resonant frequency of the TE mode, within the same frequency band and passband range. This facilitates the implementation of single-cavity coupled HE mode and TE mode resonant modes in the multimode resonator 1, improving the performance and design flexibility of the multimode resonator 1.

[0253] Furthermore, since the multimode resonator 1 can achieve at least a third-order filtering effect, it is equivalent to the filtering effect of at least three single-mode resonators, that is, equivalent to the filtering effect of at least three microwave resonators, thereby improving the performance and space utilization of the multimode resonator 1. Moreover, the multimode resonator 1 has a smaller size, which is beneficial for miniaturization and weight reduction. Furthermore, compared to existing technologies that achieve multimode solely based on openings and slots, this multimode resonator 1 primarily achieves three modes by changing the shape of the dielectric resonator 20, resulting in a higher Q-value (Quality Factor), less energy loss in the resonant circuit, and better performance.

[0254] like Figure 1 , Figure 14As shown, in a specific application example, multimode resonator 1 is coupled with three orthogonal resonant modes: HE mode and TE mode, making it a HE-TE tri-mode resonator. In this HE-TE tri-mode resonator, the resonant frequency of the HE mode is close to that of the TE mode, around 1.8 GHz. The Q value of the HE mode can reach 15000, and the Q value of the TE mode can reach 11000. The nearest mode 4 outside the passband is 500 MHz away, resulting in minimal impact on near-end suppression.

[0255] like Figure 3 , Figure 9 As shown, in some embodiments, the first coupling structure 30 and the dielectric cylinder 24 are located on the same end side of the dielectric body 23, with the first coupling structure 30 disposed inside the dielectric cylinder 24. This arrangement allows the first coupling structure 30 and the dielectric cylinder 24 to share space, compressing the total space occupied by the first coupling structure 30 and the dielectric cylinder 24. This optimizes and compacts the structural layout of the multimode resonator 1, facilitating its miniaturization. Furthermore, since the first coupling structure 30 is housed inside the dielectric cylinder 24, the structure of the dielectric cylinder 24 is not damaged by the first coupling structure 30, and the performance and specifications of the multimode resonator 1 are not affected, thus optimizing the overall performance of the multimode resonator 1.

[0256] Similarly, such as Figure 3 , Figure 9 As shown, in some embodiments, the second coupling structure 40 and the medium cylinder 24 are located on the same end side of the medium body 23, and the second coupling structure 40 is located inside the medium cylinder 24.

[0257] Similarly, such as Figure 3 , Figure 9 As shown, in some embodiments, the third coupling structure 70 and the medium cylinder 24 are located on the same end side of the medium body 23, and the third coupling structure 70 is located inside the medium cylinder 24.

[0258] Please see Figure 1 , Figure 2 In some embodiments of this application, the multimode resonator 1 includes a metal disk 80 and an insulating member (not shown in the figure). The metal disk 80 is connected to the second wall 12 of the resonator housing 10 through the insulating member. The second wall 12 is disposed opposite to the first wall 11. The metal disk 80 and the dielectric resonator 20 are disposed opposite to each other along the axial direction of the dielectric resonator 20. The distance between the metal disk 80 and the dielectric resonator 20 is adjustable to adjust the resonant frequency of the TE mode.

[0259] It should be noted that the metal disk 80 has a disk-shaped structure and can be made of metal material, or it can be made by covering the surface of an insulating disk-shaped structure with metal material. The metal disk 80 can be a circular disk, a polygonal disk, or other shapes. Along the axial direction of the dielectric resonator 20, the metal disk 80 is arranged opposite to the dielectric resonator 20. The metal disk 80 is connected to the second wall 12 through an insulating member, which insulates the metal disk 80 from the second wall 12, prevents the metal disk 80 from being grounded, and suspends the metal disk 80 between the second wall 12 and the dielectric resonator 20, allowing the metal disk 80 to compress the magnetic field of the TE mode. The insulating member can be, but is not limited to, a plastic part, a wooden part, a ceramic part, a quartz part, a glass part, etc. The second wall 12 is the wall of the resonator housing 10 opposite to the first wall 11.

[0260] In some embodiments, the metal disk 80 may have a through hole, through which an insulating member may pass to connect the metal disk 80. Of course, in other embodiments, the through hole may be omitted from the metal disk 80, and the insulating member may be connected to the metal disk 80 by means of bonding, welding, snap-fitting, etc.

[0261] An insulating element is inserted through the second wall 12 and can move axially relative to the second wall 12 to move the metal disk 80 towards or away from the dielectric resonator 20, thereby adjusting the distance between the metal disk 80 and the dielectric resonator 20. As the distance between the metal disk 80 and the dielectric resonator 20 decreases, the metal disk 80 enhances its compression effect on the magnetic field of the TE mode, thereby increasing the resonant frequency of the TE mode. In the case where the dielectric resonator 20 includes a dielectric body 23 and a dielectric cylinder 24, and the dielectric body 23 has the dielectric cylinder 24 on its side facing away from the first wall 11, as the distance between the metal disk 80 and the dielectric resonator 20 decreases, the metal disk 80 may be located inside the dielectric cylinder 24.

[0262] By adopting the above scheme, the distance between the metal disk 80 and the dielectric resonator 20 can be conveniently and quickly adjusted relative to the second wall 12 by moving the insulating member along its axial direction. This allows the ungrounded metal disk 80 to move closer to or further away from the dielectric resonator 20 via the insulating member. Based on this, the compression effect of the metal disk 80 on the magnetic field of the TE mode can be adjusted by regulating the distance between the metal disk 80 and the dielectric resonator 20, thereby achieving independent and fine adjustment of the TE mode's resonant frequency. Tuning is convenient, quick, and precise. In other words, this embodiment allows independent tuning of the TE mode's resonant frequency via the ungrounded metal disk 80, with minimal impact on the HE mode's resonant frequency. Specifically, the smaller the distance between the metal disk 80 and the dielectric resonator 20, the more the metal disk 80 compresses the TE mode's magnetic field, resulting in a higher TE mode resonant frequency; conversely, the larger the distance between the metal disk 80 and the dielectric resonator 20, the weaker the compression effect of the metal disk 80 on the TE mode's magnetic field, resulting in a lower TE mode resonant frequency.

[0263] In addition, the compression effect of the metal disk 80 on the magnetic field of the TE mode can be enhanced by replacing it with a larger metal disk 80, thereby increasing the resonant frequency of the TE mode.

[0264] Please see Figure 2 , Figure 3 In some embodiments of this application, the multimode resonator 1 includes a ceramic base 90, which is separately connected between the dielectric resonator 20 and the first wall 11.

[0265] It should be noted that the ceramic base 90 is made of ceramic material and is a non-metallic, insulating structure. In some embodiments, the ceramic base 90 may be an alumina base. Since both the ceramic base 90 and the dielectric resonator 20 are non-metallic, they can be easily connected and fixed, improving the connection strength, reliability, and stability between them. The connection between the ceramic base 90 and the dielectric resonator 20 can be achieved through methods such as, but not limited to, bonding and welding.

[0266] Furthermore, due to the superior strength and impact resistance of the ceramic base 90, it is easier to connect and fix the ceramic base 90 to the metal first wall 11, thereby reducing the risk of damage to the dielectric resonator 20 due to the connection operation. The connection between the ceramic base 90 and the first wall 11 can be achieved through methods such as, but not limited to, bonding, welding, riveting, and screw fastening.

[0267] By adopting the above solution, the ceramic base 90, which is also a non-metallic component, can be easily connected and fixed to the dielectric resonator 20. This improves the connection strength, reliability, and stability between the ceramic base 90 and the dielectric resonator 20, reduces the risk of damage to the dielectric resonator 20 during connection operations, and lowers the connection difficulty and cost. Furthermore, it facilitates the connection and fixation of the ceramic base 90, which has better strength and impact resistance, to the metal first wall 11, further reducing the risk of damage to the dielectric resonator 20 during connection operations and improving the connection convenience, strength, reliability, and stability between the ceramic base 90 and the first wall 11. Therefore, the connection and fixation between the dielectric resonator 20 and the first wall 11 can be conveniently, quickly, and reliably achieved using the ceramic base 90.

[0268] Furthermore, since the ceramic base 90 is an insulating structure, the dielectric resonator 20 is connected and fixed to the first wall 11 via the ceramic base 90, which allows the dielectric resonator 20 to be set without grounding. Based on this, the introduction of the TM mode resonance mode to the vicinity of the passband due to the grounding connection of the dielectric resonator 20 to the first wall 11 can be basically avoided. This can promote the multimode resonator 1 to be in a single-cavity uncoupled TM mode resonance mode, reduce the mode complexity of the multimode resonator 1, and improve the performance and design flexibility of the multimode resonator 1.

[0269] Of course, in other embodiments, the dielectric resonator 20 may be directly connected and fixed to the first wall 11 by means of welding, bonding, riveting, pressing, plugging, screw fastening, threaded connection, snap-fitting, etc., or may be indirectly connected and fixed to the first wall 11 by other structures connected to it (such as base platform, coupling rib, etc.).

[0270] Please see Figure 2 , Figure 3 In some embodiments of this application, the ceramic base 90 is ring-shaped, and the third coupling structure 70 is disposed between the dielectric resonator 20 and the first wall 11, and is disposed within the ring of the ceramic base 90.

[0271] By adopting the above scheme, when the dielectric resonator 20 is connected and fixed to the first wall 11 via the ceramic base 90, and the third coupling structure 70 is disposed between the dielectric resonator 20 and the first wall 11, the ceramic base 90 can be arranged in a ring shape, and the third coupling structure 70 can be disposed within the ring of the ceramic base 90. Based on this, on the one hand, the third coupling structure 70 and the ceramic base 90 can share space, which can compress the total space occupied by the third coupling structure 70 and the ceramic base 90, thereby optimizing and compacting the structural layout of the multimode resonator 1, which is beneficial to the miniaturization of the multimode resonator 1. On the other hand, the ceramic base 90 can be arranged away from the third coupling structure 70 and the dielectric resonator 20, which can reduce the impact of the ceramic base 90 on the coupling strength and coupling effect between the third coupling structure 70 and the HE dual-mode, thereby optimizing the coupling strength and coupling effect between the third coupling structure 70 and the HE dual-mode, and optimizing the overall performance of the multimode resonator 1.

[0272] Similarly, such as Figure 2 , Figure 3 As shown, in some embodiments, the first coupling structure 30 is disposed between the dielectric resonator 20 and the first wall 11, and is disposed within the ring of the ceramic base 90.

[0273] Similarly, such as Figure 2 , Figure 3 As shown, in some embodiments, the second coupling structure 40 is disposed between the dielectric resonator 20 and the first wall 11, and is disposed within the ring of the ceramic base 90.

[0274] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the multimode resonator 1 includes a first tuning screw 100, which is threaded to the resonator housing 10 and disposed on a first radial direction x.

[0275] It should be noted that, based on the HE mode, one electric field polarization direction is along the first radial direction x. Therefore, the first tuning screw 100 located on the first radial direction x can be used to adjust the HE mode (e.g., HE mode) with the electric field polarization direction along the first radial direction x. ∥ The resonant frequency of the mode. For example, HE ∥ The electric field polarization direction of the mode is along the first radial direction x (please refer to the following). Figure 5 Therefore, the first tuning screw 100 located on the first radial direction x is used to adjust HE. ∥ The mode's resonant frequency can be adjusted by approximately 15 MHz.

[0276] The number of first tuning screws 100 may be one or more. A first tuning screw 100 may be threadedly connected to any wall portion of the resonator housing 10 (e.g., the first wall 11, the second wall 12 opposite to the first wall 11, or the side wall 13 connecting the first wall 11 and the second wall 12). A first tuning screw 100 may be directly threaded into a threaded hole in the corresponding wall portion; alternatively, a first mounting member (not shown) may be embedded in the corresponding wall portion, and the first tuning screw 100 may be threaded into a threaded hole in the first mounting member. The first tuning screw 100 is grounded based on its connection to the resonator housing 10.

[0277] Based on the first tuning screw 100 being positioned in the first radial direction x, the specific position of the first tuning screw 100 relative to the dielectric resonator 20 can be flexibly set. For example... Figure 4 As shown, in some embodiments, the first tuning screw 100 may be located on the periphery of the dielectric resonator 20 along the first radial direction x; in this case, when there are multiple first tuning screws 100, the multiple first tuning screws 100 may be located only on the same side of the dielectric resonator 20 along the first radial direction x, or they may be located on opposite sides of the dielectric resonator 20 along the first radial direction x. In other embodiments, the first tuning screw 100 may be disposed corresponding to the dielectric resonator 20 along the axial direction of the dielectric resonator 20; in this case, the first tuning screw 100 may be spaced apart from the dielectric resonator 20 along the axial direction of the dielectric resonator 20, and the first tuning screw 100 may also extend into the dielectric resonator 20 (at this time, the dielectric resonator 20 may have a clearance hole for the first tuning screw 100 to extend into; or, when the dielectric resonator 20 has the first opening 211 mentioned above, the first tuning screw 100 may also extend into the first opening 211, and the first opening 211 may be used as a clearance hole for the first tuning screw 100 to extend into).

[0278] By adopting the above scheme, the length of the portion of the first tuning screw 100 extending into the resonator housing 10 can be conveniently and quickly adjusted by screwing it in or out. Based on this, the HE mode (e.g., HE) along the first radial direction x can be affected by adjusting the length of the portion of the first tuning screw 100 extending into the resonator housing 10. ∥ The electric field of the HE mode (e.g., HE) can be independently and finely adjusted along the first radial x-axis, thereby enabling independent adjustment and fine adjustment of the electric field polarization direction. ∥ The resonant frequency of the HE mode (e.g., HE) can be easily, quickly, and accurately tuned. Specifically, in this embodiment, the resonant frequency of the HE mode (e.g., HE) along the first radial direction x can be tuned via a grounded first tuning screw 100 located in the first radial direction x. ∥ The resonant frequency of the HE mode (e.g., HE) is independently tuned, and the electric field polarization direction along the second radial direction y is basically unaffected. ⊥The resonant frequencies of the HE mode and the TE mode are determined. Specifically, the longer the portion of the first tuning screw 100 extending into the resonator housing 10, the higher the electric field polarization direction along the first radial x-axis. ∥ The lower the resonant frequency of the mode, the higher the resonant frequency; conversely, the shorter the length of the portion of the first tuning screw 100 extending into the resonator housing 10, the higher the resonant frequency of the HE mode (e.g., HE) with the electric field polarization direction along the first radial x. ∥ The higher the resonant frequency of the mode, the better.

[0279] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the multimode resonator 1 includes a second tuning screw 110, which is threaded to the resonator housing 10 and disposed on the second radial direction y.

[0280] It should be noted that, based on the fact that another electric field polarization direction of the HE mode is along the second radial direction y, the second tuning screw 110 located on the second radial direction y can be used to adjust the HE mode (e.g., HE mode) with the electric field polarization direction along the second radial direction y. ⊥ The resonant frequency of the mode. For example, HE ⊥ The electric field polarization direction of the mode is along the second radial direction y (please refer to the following). Figure 6 Therefore, the second tuning screw 110 located on the second radial direction y is used to adjust HE. ⊥ The mode's resonant frequency can be adjusted by approximately 15 MHz.

[0281] The number of second tuning screws 110 may be one or more. The second tuning screw 110 may be threadedly connected to any wall portion of the resonator housing 10 (e.g., the second wall 12, the second wall 12 opposite to the second wall 12, or the side wall 13 connecting the second wall 12 and the second wall 12). The second tuning screw 110 may be directly threadedly connected to a threaded hole in the corresponding wall portion; alternatively, a second mounting member (not shown in the figure) may be embedded in the corresponding wall portion, and the second tuning screw 110 may be threadedly connected to a threaded hole in the second mounting member. The second tuning screw 110 is grounded based on its connection to the resonator housing 10.

[0282] Based on the second tuning screw 110 being positioned in the second radial direction y, the specific position of the second tuning screw 110 relative to the dielectric resonator 20 can be flexibly set. For example... Figure 4As shown, in some embodiments, the second tuning screw 110 may be located on the periphery of the dielectric resonator 20 along the second radial direction y; in this case, when there are multiple second tuning screws 110, the multiple second tuning screws 110 may be located only on the same side of the dielectric resonator 20 along the second radial direction y, or they may be located on opposite sides of the dielectric resonator 20 along the second radial direction y. In other embodiments, the second tuning screw 110 may be disposed corresponding to the dielectric resonator 20 along the axial direction of the dielectric resonator 20; in this case, the second tuning screw 110 may be spaced apart from the dielectric resonator 20 along the axial direction of the dielectric resonator 20, and the second tuning screw 110 may also extend into the dielectric resonator 20 (at this time, the dielectric resonator 20 may have a clearance hole for the second tuning screw 110 to extend into; or, when the dielectric resonator 20 has the second opening 221 mentioned above, the second tuning screw 110 may also extend into the second opening 221, and the second opening 221 may be used as a clearance hole for the second tuning screw 110 to extend into).

[0283] By adopting the above scheme, the length of the portion of the second tuning screw 110 extending into the resonator housing 10 can be conveniently and quickly adjusted by screwing it in or out. Based on this, the HE mode (e.g., HE) along the second radial direction y can be affected by adjusting the length of the portion of the second tuning screw 110 extending into the resonator housing 10. ⊥ The electric field of the HE mode (e.g., HE) can be independently and finely adjusted along the second radial direction y, thereby enabling independent adjustment and fine adjustment of the electric field polarization direction. ⊥ The resonant frequency of the HE mode (e.g., HE) can be easily, quickly, and accurately tuned. Specifically, in this embodiment, the resonant frequency of the HE mode (e.g., HE) along the second radial direction y can be tuned via a grounded second tuning screw 110 located in the second radial direction y. ⊥ The resonant frequency of the HE mode (e.g., HE) is independently tuned, and the electric field polarization direction along the first radial x is basically unaffected. ∥ The resonant frequencies of the HE mode and the TE mode are determined by the length of the second tuning screw 110 extending into the resonator housing 10. The longer the portion of the second tuning screw 110 extends into the resonator housing 10, the higher the electric field polarization direction along the second radial direction y. ⊥ The lower the resonant frequency of the mode, the shorter the length of the portion of the second tuning screw 110 extending into the resonator housing 10, and the higher the resonant frequency of the HE mode (e.g., HE mode) with the electric field polarization direction along the second radial direction y. ⊥ The higher the resonant frequency of the mode, the better.

[0284] Please see Figure 15 Some embodiments of this application provide a filter, including the multimode resonator 1 provided in the embodiments of this application.

[0285] It should be noted that the filter may include one or more resonators, and at least one resonator is the multimode resonator 1 provided in the embodiments of this application. When there are multiple resonators, the multiple resonators can be arranged in a specific layout, and coupling relationships can be established between adjacent resonators as needed.

[0286] By adopting the above scheme, the filter can be coupled by using the multimode resonator 1 provided in the embodiments of this application, thereby improving the performance and power capacity of the filter.

[0287] Furthermore, based on some embodiments of this application, the multimode resonator 1 can precisely control the two electric field polarization directions of the HE mode along a preset direction, and can intuitively determine the two electric field polarization directions of the HE mode. Therefore, it is convenient for the multimode resonator 1 to construct the relevant coupling design of the HE mode itself, and it is also convenient for the multimode resonator 1 to construct the relevant coupling design of the HE mode with adjacent resonators.

[0288] For example, such as Figure 15 , Figure 16 , Figure 17 As shown, in a specific example of the filter, the filter includes two multimode resonators 1 provided in the embodiments of this application. This filter is a 2-cavity, 6th-order, 4-zero filter. The HE of each multimode resonator 1... ⊥ Model, TE model, HE ∥ The modules are coupled sequentially, and HE ⊥ Model and HE ∥ Mode coupling. The HE of the two multimode resonators 1... ∥ The electric field polarization direction of each mode is along the first radial direction x. A coupling window 2 is provided between two adjacent multimode resonators 1, and the first radial direction x of both multimode resonators 1 corresponds to the penetration direction of the coupling window 2. The HE of the two multimode resonators 1... ∥ The modes can be directly coupled via coupling window 2. A metal boom 3 can be installed in coupling window 2, connecting the two multimode resonators 1. ∥ The coupling of the mold can be enhanced via the metal fly rod 3.

[0289] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multimode resonator, characterized in that, The multimode resonator has at least three resonance modes: HE mode and TE mode. The multimode resonator includes: Resonator housing; A dielectric resonator is disposed inside the resonator housing and connected to the first wall of the resonator housing; the two electric field polarization directions of the HE mode are respectively along a first radial direction and a second radial direction, and the first radial direction and the second radial direction intersect perpendicularly at the central axis of the dielectric resonator; A first coupling structure is disposed on the end side of the dielectric resonator. The first coupling structure includes a first coupling part and a second coupling part. The first coupling part extends along the first radial direction. One end of the second coupling part is connected to the end of the first coupling part away from the central axis of the dielectric resonator. The second coupling part extends along the circumferential direction of the dielectric resonator. There are two first coupling structures. The second coupling parts of the two first coupling structures are disposed on the same side of the first coupling part.

2. The multimode resonator as described in claim 1, characterized in that, The two first coupling structures are arranged symmetrically about the second radial direction.

3. The multimode resonator as described in claim 1, characterized in that, The first coupling structure changes the coupling polarity by switching the second coupling part to different sides of the first coupling part.

4. The multimode resonator as described in claim 1, characterized in that, The first coupling structure is metallized on the end face of the dielectric resonator.

5. The multimode resonator as described in claim 1, characterized in that, The multimode resonator further includes a second coupling structure, which is disposed on the end side of the dielectric resonator. The second coupling structure includes a third coupling portion and a fourth coupling portion. The third coupling portion extends along the second radial direction, and one end of the fourth coupling portion is connected to the end of the third coupling portion away from the central axis of the dielectric resonator. The fourth coupling portion extends along the circumferential direction of the dielectric resonator. The second coupling structure is provided in two parts, and the fourth coupling part of the two second coupling structures is provided on the same side of the third coupling part.

6. The multimode resonator as described in claim 5, characterized in that, The two second coupling structures are arranged symmetrically about the first radial direction; And / or, the second coupling structure changes the coupling polarity it achieves by switching the fourth coupling portion to different sides of the third coupling portion; And / or, the second coupling structure is metallized on the end face of the dielectric resonator; And / or, the first coupling structure and the second coupling structure are located on the same end side of the dielectric resonator.

7. The multimode resonator as described in any one of claims 1-6, characterized in that, The dielectric resonator has a first opening structure in the first radial direction and a second opening structure in the second radial direction. The first opening structure includes at least one first opening, and the second opening structure includes at least one second opening. The first opening structure and the second opening structure are non-rotationally symmetric along the central axis of the dielectric resonator, so that the two electric field polarization directions of the HE mode are along the first radial direction and the second radial direction, respectively.

8. The multimode resonator as described in claim 7, characterized in that, When there is one first opening, the distance between the first opening and the central axis of the dielectric resonator along the first radial direction is the first distance; when there are multiple first openings, the distance between the two farthest first openings along the first radial direction is the first distance. When there is one second opening, the distance between the second opening and the central axis of the dielectric resonator along the second radial direction is the second distance; when there are multiple second openings, the distance between the two second openings that are furthest apart along the second radial direction is the second distance. The first distance is not equal to the second distance.

9. The multimode resonator as described in claim 7, characterized in that, The first opening is formed on the end face of the dielectric resonator and is located between the outer peripheral surface of the dielectric resonator and the central axis of the dielectric resonator. The second opening is formed on the end face of the dielectric resonator and is located between the outer peripheral surface of the dielectric resonator and the central axis of the dielectric resonator.

10. The multimode resonator as described in claim 9, characterized in that, The first coupling structure includes a fifth coupling portion extending along the periphery of the first opening, the fifth coupling portion being connected between the first coupling portion and the second coupling portion.

11. The multimode resonator as described in any one of claims 1-6, characterized in that, The multimode resonator includes a first adjustment plate, which is erected at the intersection of the first coupling part and the second coupling part of the first coupling structure.

12. The multimode resonator as described in claim 9, characterized in that, The multimode resonator includes a first adjustment plate, which is erected at the intersection of the first coupling part and the second coupling part of the first coupling structure. When the first coupling portion and the second coupling portion of the first coupling structure fall into the first opening, at least a portion of the first adjusting piece is inserted into the first opening.

13. The multimode resonator as described in any one of claims 1-6, characterized in that, The multimode resonator includes a third coupling structure, which is disposed on the end side of the dielectric resonator and intersects the central axis of the dielectric resonator perpendicularly. The third coupling structure is set at an angle to the first radial direction and at an angle to the second radial direction to enable HE dual-mode coupling.

14. The multimode resonator as described in claim 13, characterized in that, The third coupling structure is a rib, and the third coupling structure is disposed between the dielectric resonator and the first wall.

15. The multimode resonator as described in claim 13, characterized in that, The third coupling structure is metallized on the end face of the dielectric resonator.

16. The multimode resonator as described in claim 13, characterized in that, The third coupling structure forms a 45° angle with the first radial direction and a 45° angle with the second radial direction.

17. The multimode resonator as described in claim 13, characterized in that, The third coupling structure changes the coupling polarity between the HE dual modes by rotating 90° around the central axis of the dielectric resonator.

18. The multimode resonator as described in claim 13, characterized in that, The multimode resonator includes a coupling adjustment screw, which is threaded to the resonator housing and located in the extension direction of the third coupling structure.

19. The multimode resonator as described in any one of claims 1-6, characterized in that, The dielectric resonator includes a dielectric body and a dielectric cylinder, wherein the dielectric cylinder is erected on one end of the dielectric body and surrounds the periphery of the dielectric body.

20. The multimode resonator as described in any one of claims 1-6, characterized in that, The multimode resonator includes a metal disk and an insulating element. The metal disk is connected to the second wall of the resonator housing through the insulating element. The second wall is disposed opposite to the first wall. The metal disk and the dielectric resonator are disposed opposite to each other along the axial direction of the dielectric resonator. The distance between the metal disk and the dielectric resonator is adjustable to adjust the resonant frequency of the TE mode.

21. The multimode resonator as described in any one of claims 1-6, characterized in that, The multimode resonator includes a ceramic base, which is separately connected between the dielectric resonator and the first wall.

22. The multimode resonator as described in any one of claims 1-6, characterized in that, The multimode resonator includes a first tuning screw, which is threaded to the resonator housing and disposed in the first radial direction; And / or, the multimode resonator includes a second tuning screw, which is threaded to the resonator housing and disposed in the second radial direction.

23. A filter, characterized in that, Includes the multimode resonator as described in any one of claims 1-22.

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