Multi-mode resonator and filter

Abstract

The application relates to the communication field and provides a multimode resonator and a filter. The multimode resonator comprises a resonator shell and a dielectric resonant piece. The dielectric resonant piece is arranged in the resonator shell and is connected to a first wall of the resonator shell. The dielectric resonant piece is provided with a first opening structure in a first radial direction and a second opening structure in a second radial direction. The first radial direction and the second radial direction are perpendicular to a central axis of the dielectric resonant piece. The first opening structure and the second opening structure are non-rotationally symmetrical structures along the central axis of the dielectric resonant piece, so that two electric field polarization directions of the HE mode are along the first radial direction and the second radial direction respectively. The multimode resonator can reduce the requirement for processing error and processing precision based on the first opening structure and the second opening structure, accurately control the two electric field polarization directions of the HE mode along the preset first radial direction and the second radial direction, improve the processing convenience and consistency of the multimode resonator, and facilitate the related coupling design of the HE mode 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] Currently, multimode resonators with both HE and H modes are typically constructed by creating a slot in each of the four radial directions (45°, 135°, 225°, and 315°) of the dielectric cylinder, ensuring that the depth and length of each slot are identical. This allows the HE mode to resonate with the H mode. ∥ 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, resulting in poor consistency of the multimode resonator and making it difficult to design the related coupling of the HE mode of the multimode resonator. Summary of the Invention

[0003] This application provides a multimode resonator designed to address the challenges posed by manufacturing errors and difficulty in precisely controlling manufacturing accuracy in HE (Heat) systems. ∥ Model, HE ⊥ The electric field polarization direction of the mode will deviate from the preset direction, resulting in poor consistency of the multimode resonator and making it difficult to design the related coupling of the HE mode of the multimode resonator.

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

[0005] In a first aspect, a multimode resonator is provided, the multimode resonator having at least two resonance modes, HE mode and the multimode resonator comprising:

[0006] Resonator housing;

[0007] A dielectric resonator is disposed within the resonator housing and connected to the first wall of the resonator housing. The dielectric resonator has a first opening structure in a first radial direction and a second opening structure in a second radial direction. The first radial direction and the second radial direction intersect perpendicularly at the central axis of the dielectric resonator. 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.

[0008] 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.

[0009] 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.

[0010] The first distance is not equal to the second distance.

[0011] In some embodiments, at least one of the first openings 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.

[0012] And / or, at least one of the first openings is formed on the outer peripheral surface of the dielectric resonator and communicates with at least one end face of the dielectric resonator;

[0013] And / or, at least one of the first openings is formed on the outer peripheral surface of the dielectric resonator and is located between the two end faces of the dielectric resonator.

[0014] In some embodiments, at least one of the second openings 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.

[0015] And / or, at least one of the second openings is formed on the outer peripheral surface of the dielectric resonator and communicates with at least one end face of the dielectric resonator;

[0016] And / or, at least one of the second openings is formed on the outer peripheral surface of the dielectric resonator and is located between the two end faces of the dielectric resonator.

[0017] In some embodiments, the first opening is a hole structure; and / or, the second opening is a hole structure.

[0018] In some embodiments, there are two first openings, and the two first openings are arranged symmetrically about the central axis of the dielectric resonator.

[0019] And / or, there are two second openings, which are arranged symmetrically about the central axis of the dielectric resonator.

[0020] In some embodiments, the multimode resonator has at least three resonance modes: HE mode and TE mode. The dielectric resonator includes a dielectric body and a dielectric cylinder, with the dielectric cylinder erected on one end of the dielectric body and surrounding the periphery of the dielectric body.

[0021] In some embodiments, two media cylinders are provided, and the two media cylinders are respectively erected at opposite ends of the media body.

[0022] 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 body are disposed opposite to each other along the axial direction of the dielectric body. The distance between the metal disk and the dielectric body is adjustable to adjust the resonant frequency of the TE mode.

[0023] In some embodiments, the multimode resonator includes a ceramic base, which is separately connected between the dielectric resonator and the first wall.

[0024] In some embodiments, the multimode resonator includes a first adjusting screw, which is threaded to the resonator housing and disposed in the first radial direction;

[0025] And / or, the multimode resonator includes a second adjusting screw, which is threaded to the resonator housing and disposed in the second radial direction.

[0026] Secondly, a filter is provided, including the multimode resonator provided in the embodiments of this application.

[0027] The advantages of the multimode resonator provided in this application are as follows:

[0028] The multimode resonator provided in this application embodiment can be configured by setting a first opening structure in a first radial direction and a second opening structure in a second radial direction of the dielectric resonator, and by making the first and second opening structures non-rotationally symmetric along the central axis of the dielectric resonator. This allows the first and second opening structures to disrupt the rotational symmetry of the dielectric resonator, enabling the dielectric resonator to have unique characteristics in the first and second radial directions, respectively. Based on this, the first and second opening structures 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 and second radial directions, respectively. Furthermore, since the first and second opening structures are designed differently (i.e., set differently), the processing of the first and second opening structures 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 and second opening structures. Therefore, the requirements for processing errors and processing accuracy of the first and second opening structures can be reduced. It is convenient to accurately guide and control one electric field polarization direction of the HE mode along the first radial direction through the first opening structure, and to accurately guide and control the other electric field polarization direction of the HE mode along the second radial direction through the second opening structure. This enables precise guidance and control of the two electric field polarization directions of the HE mode along a preset direction, which can improve the processing convenience, consistency and stability of the multimode resonator. It is also convenient to design the coupling structure based on the two accurately determined and unbiased electric field polarization directions of the HE mode, and facilitate the related coupling design of the HE mode of the multimode resonator. Attached Figure Description

[0029] 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.

[0030] Figure 1 A three-dimensional schematic diagram of a multimode resonator provided for some embodiments of this application;

[0031] Figure 2 for Figure 1 A partial structural schematic diagram of the provided multimode resonator;

[0032] Figure 3 for Figure 2 A top view of the provided multimode resonator;

[0033] Figure 4 for Figure 2 A three-dimensional sectional view of the provided dielectric resonator;

[0034] Figure 5 for Figure 1 HE of the provided multimode resonator ∥ Electric field distribution diagram of the model;

[0035] Figure 6 for Figure 1 HE of the provided multimode resonator ⊥ Electric field distribution diagram of the model;

[0036] Figure 7 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;

[0037] Figure 8 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;

[0038] Figure 9 for Figure 1 The electric field distribution diagram of the TE mode of the provided multimode resonator;

[0039] Figure 10 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;

[0040] Figure 11 Schematic diagrams of the filter structure provided in some embodiments of this application;

[0041] Figure 12 for Figure 11 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;

[0042] Figure 13 for Figure 11 The provided simulation waveform diagram of the filter.

[0043] The following are the labeling elements in the figure:

[0044] 1-Multimode resonator, 2-Coupled window, 3-Metal flybar;

[0045] 10-Resonator housing, 11-First wall, 12-Second wall, 13-Side wall, 14-Resonant cavity; 20-Dielectric resonator, 21-First opening structure, 211-First opening, 22-Second opening structure, 221-Second opening, 23-Dielectric body, 24-Dielectric cylinder; 30-Metal disk, 40-Ceramic base, 50-First adjusting screw, 60-Second adjusting screw; x-First radial direction, y-Second radial direction, L-Central axis of dielectric resonator, d1-First distance, d2-Second distance. Detailed Implementation

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] In this application, "central axis" refers to a line that passes through the geometric center of the corresponding structure.

[0051] 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.

[0052] 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.

[0053] Currently, multimode resonators with both HE and H modes are typically constructed by creating a slot in each of the four radial directions (45°, 135°, 225°, and 315°) of the dielectric cylinder, ensuring that the depth and length of each slot are identical. This allows the HE mode to resonate with the H mode. ∥ 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, resulting in poor consistency of the multimode resonator and making it difficult to design the related coupling of the HE mode of the multimode resonator.

[0054] The embodiments provided in this application will solve the above problems.

[0055] The specific implementation of this application will be described in detail below with reference to specific embodiments:

[0056] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 Some embodiments of this application provide a multimode resonator 1, which has at least two resonance modes: HE mode and HE mode. The multimode resonator 1 includes a resonator housing 10 and a dielectric resonator 20. The dielectric resonator 20 is disposed within the resonator housing 10 and connected to the first wall 11 of the resonator housing 10. The dielectric resonator 20 has a first opening structure 21 in a first radial direction x and a second opening structure 22 in a second radial direction y. 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 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, such that the two electric field polarization directions of the HE mode are along the first radial direction x and the second radial direction y, respectively.

[0057] It should be noted that the multimode resonator 1 has at least two resonance modes, HE mode and HE mode. That is, the multimode resonator 1 can support at least HE mode within its passband. For example, the multimode resonator 1 can be an HE dual-mode resonator, an HE-TE tri-mode resonator, an HE-TM tri-mode resonator, an HE-TE-TM quad-mode resonator, etc.

[0058] 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 14 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 14. Optionally, the dielectric resonator 20 can be centrally arranged within the resonant cavity 14. The resonator housing 10 can provide shielding to prevent signal leakage.

[0059] 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.

[0060] 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 ceramic base 40, base platform, coupling rib, 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.

[0061] It should also be noted that the dielectric resonator 20 has two end faces along its own axial direction, and 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 x and the second radial y are the two radial directions of the dielectric resonator 20, which intersect perpendicularly, and both the first radial x and the second radial y intersect perpendicularly with the central axis L of the dielectric resonator 20.

[0062] The dielectric resonator 20 has a first opening structure 21 on the first radial direction x, and more particularly, 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, wherein 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.

[0063] 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.

[0064] 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.

[0065] 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 ∥ 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.

[0066] 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.

[0067] 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.

[0068] In summary, the multimode resonator 1 provided in this application embodiment can achieve this by setting a first opening structure 21 on the first radial direction x of the dielectric resonator 20 and a second opening structure 22 on the second radial direction y of the dielectric resonator 20, and making the first opening structure 21 and the second opening structure 22 non-rotationally symmetric 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 form 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 adopt a different design (i.e., they are 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 error 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 direction 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 direction 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, which can improve the processing convenience, consistency and stability of the multimode resonator 1. It is convenient to design the coupling structure according to the two accurately determined and unbiased electric field polarization directions of the HE mode, and facilitate the related coupling design of the HE mode of the multimode resonator 1.

[0069] 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 be coupled to the HE mode in a single cavity as needed, or coupled to the HE mode and the TE mode in a single cavity as needed, thereby improving the performance and design flexibility of the multimode resonator 1.

[0070] Please see Figure 2 , Figure 3 In 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.

[0071] It should be noted that, as Figure 3 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.

[0072] like Figure 3 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.

[0073] 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.

[0074] 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.

[0075] 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 direction 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 direction 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 related coupling design of the HE mode based on the accurately determined and unbiased two electric field polarization directions of the HE mode.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, at least one 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.

[0080] 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.

[0081] By adopting the above scheme, the first opening structure 21 can guide and control one electric field polarization direction of the HE mode along the first radial x through the first opening 211, and the electric field polarization direction of the HE mode along the first radial x can be directly determined from the end face of the dielectric resonator 20, thereby facilitating the design of relevant coupling structures based on the electric field polarization direction of the HE mode along the first radial x.

[0082] 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.

[0083] 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, it is easier to control the resonant frequency of the TE mode more precisely. 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 whether the resonant frequency of the TE mode is "within the passband and close to the same frequency band as the resonant frequency of the HE mode". It is also easier for the multimode resonator 1 to be coupled to the two resonant modes of the single cavity and the HE mode as needed, or to be coupled to the three resonant modes of the single cavity and the HE mode and the TE mode as needed, which can improve the performance and design flexibility of the multimode resonator 1.

[0084] 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.

[0085] Please see Figure 1 , Figure 7 In some embodiments of this application, at least one first opening 211 is formed on the outer peripheral surface of the dielectric resonator 20 and connected to at least one end face of the dielectric resonator 20.

[0086] It should be noted that the first opening 211 can be a hole or a groove. The first opening 211 is formed on the outer peripheral surface of the dielectric resonator 20, and the first opening 211 connects to both the outer peripheral surface of the dielectric resonator 20 and at least one end face of the dielectric resonator 20. The depth direction of the first opening 211 (e.g., the hole depth direction of a hole, the groove depth direction of a groove) corresponds to both the first radial direction x and the axial direction of the dielectric resonator 20. Specifically, the first opening 211 can connect to the corresponding end face of the dielectric resonator 20 along one side of the axial direction of the dielectric resonator 20, or the first opening 211 can connect to the two opposite end faces of the dielectric resonator 20 along opposite sides of the axial direction of the dielectric resonator 20.

[0087] By adopting the above scheme, the first opening structure 21 can guide and control an electric field polarization direction of the HE mode along the first radial x through the first opening 211, and the electric field polarization direction of the HE mode along the first radial x can be directly determined from the end face of the dielectric resonator 20 connected by the first opening 211. Thus, it is convenient to design relevant coupling structures according to the electric field polarization direction of the HE mode along the first radial x.

[0088] By adopting the above scheme, the depth direction of the first opening 211 corresponds to the axial direction and the first radial direction x of the dielectric resonator 20. This facilitates thinning of specific areas of the dielectric resonator 20 along the axial direction and the first radial direction x, thereby allowing for the desired increase in the resonant frequencies of the HE mode and the TE mode. Furthermore, since the electric field of the TE mode is concentrated around the periphery of the dielectric resonator 20, and the first opening 211 connects to the outer peripheral surface of the dielectric resonator 20, the first opening 211 has the greatest impact on the resonant frequency of the TE mode. Based on this, the resonant frequency of the TE mode can be significantly increased through the first opening 211, facilitating convenient and quick adjustment of the TE mode resonant frequency, increasing the range of TE mode resonant frequency that can be increased, and making it easier to increase the TE mode resonant frequency to the required range. This facilitates the design of the multimode resonator 1 in single-cavity coupled (or uncoupled) TE mode resonant mode, improving the performance and design flexibility of the multimode resonator 1.

[0089] However, since the first opening 211 connects to 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. The first opening 211 may have a large boost to the resonant frequency of the HE mode, and the first opening 211 may have a large 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 large impact of the first opening 211 on the resonant frequency of the HE mode. Compared with the previous embodiment, this embodiment is less convenient for finely controlling the resonant frequency of the HE mode, that is, the difficulty of "controlling the resonant frequency of the HE mode to be within the passband range and close to the desired frequency band" is relatively greater.

[0090] Furthermore, since the first opening 211 is connected to at least one 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.

[0091] Please see Figure 1 , Figure 8 In some embodiments of this application, at least one first opening 211 is formed on the outer peripheral surface of the dielectric resonator 20 and is disposed between the two end faces of the dielectric resonator 20.

[0092] It should be noted that the first opening 211 can be a hole structure or a groove structure. The first opening 211 is formed on the outer peripheral surface of the dielectric resonator 20 and is located between two opposite end faces of the dielectric resonator 20 along the axial direction. That is, along the axial direction of the dielectric resonator 20, the first opening 211 is not connected to either end face of the dielectric resonator 20, and the two opposite ends of the first opening 211 in the axial direction of the dielectric resonator 20 are closed.

[0093] By adopting the above scheme, the first opening structure 21 can conveniently guide and control one electric field polarization direction of the HE mode along the first radial x through the first opening 211, and it is convenient to design related coupling structures according to the electric field polarization direction of the HE mode along the first radial x. However, since the first opening 211 is hidden between the two end faces of the dielectric resonator 20, the electric field polarization direction of the HE mode along the first radial x needs to be determined from the outer peripheral surface of the dielectric resonator 20, which is relatively less intuitive.

[0094] By adopting the above scheme, the depth direction of the first opening 211 can correspond to the first radial direction x, which facilitates the thinning of a specific area of ​​the dielectric resonator 20 along the first radial direction x, thereby allowing the resonant frequencies of the HE mode and TE mode to be increased as needed. Furthermore, since the electric field of the TE mode is concentrated around the periphery of the dielectric resonator 20, when the first opening 211 is located on the outer peripheral surface of the dielectric resonator 20, the first opening 211 has a significant impact on the resonant frequency of the TE mode. Therefore, the resonant frequency of the TE mode can be significantly increased through the first opening 211, facilitating convenient and quick adjustment of the TE mode resonant frequency, increasing the range of TE mode resonant frequency that can be increased, and making it easier to increase the TE mode resonant frequency to the required range. This facilitates the design of the multimode resonator 1 in single-cavity coupled (or uncoupled) TE mode resonant mode as needed, improving the performance and design flexibility of the multimode resonator 1.

[0095] However, since the first opening 211 is located on the outer peripheral surface of the dielectric resonator 20, it 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. The first opening 211 may significantly increase the resonant frequency of the HE mode. Therefore, 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 where "the first opening 211 is located on the end face of the dielectric resonator 20 and between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20", this embodiment is 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 and close to the desired frequency band".

[0096] Furthermore, it should be noted that in this application, 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", can be selected to be provided when there is only one first opening 211. When there are multiple first openings 211, they can be implemented individually, in pairs, or all in combination.

[0097] It should also 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".

[0098] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, at least one 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.

[0099] 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.

[0100] By adopting the above scheme, the second opening structure 22 can guide and control one electric field polarization direction of the HE mode along the second radial direction y through the second opening 221, and the electric field polarization direction of the HE mode along the second radial direction y can be directly determined from the end face of the dielectric resonator 20, thereby facilitating the design of relevant coupling structures based on the electric field polarization direction of the HE mode along the second radial direction y.

[0101] 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.

[0102] 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, it is easier to control the resonant frequency of the TE mode more precisely. 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 whether the resonant frequency of the TE mode is "within the passband and close to the same frequency band as the resonant frequency of the HE mode". It is also easier for the multimode resonator 1 to be coupled to the two resonant modes of the single cavity and the HE mode as needed, or to be coupled to the three resonant modes of the single cavity and the HE mode and the TE mode as needed, which can improve the performance and design flexibility of the multimode resonator 1.

[0103] 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.

[0104] Please see Figure 1 , Figure 7 In some embodiments of this application, at least one second opening 221 is formed on the outer peripheral surface of the dielectric resonator 20 and communicates with at least one end face of the dielectric resonator 20.

[0105] It should be noted that the second opening 221 can be a hole or a slot. The second opening 221 is formed on the outer peripheral surface of the dielectric resonator 20, and simultaneously connects to both the outer peripheral surface of the dielectric resonator 20 and at least one end face of the dielectric resonator 20. The depth direction of the second opening 221 (e.g., the hole depth direction of a hole, the slot depth direction of a slot) corresponds to both the second radial direction y and the axial direction of the dielectric resonator 20. Specifically, the second opening 221 can connect to the corresponding end face of the dielectric resonator 20 along one side of its axial direction, or it can connect to the two opposite end faces of the dielectric resonator 20 along opposite sides of its axial direction.

[0106] By adopting the above scheme, the second opening structure 22 can guide and control one electric field polarization direction of the HE mode along the second radial direction y through the second opening 221, and the electric field polarization direction of the HE mode along the second radial direction y can be directly determined from the end face of the dielectric resonator 20 connected by the second opening 221. Thus, it is convenient to design relevant coupling structures according to the electric field polarization direction of the HE mode along the second radial direction y.

[0107] By adopting the above scheme, the depth direction of the second opening 221 can correspond to the axial direction and the second radial direction y of the dielectric resonator 20. This facilitates the thinning of specific areas of the dielectric resonator 20 along the axial direction and the second radial direction y, thereby allowing for the desired increase in the resonant frequency of the HE mode and the TE mode. Furthermore, since the electric field of the TE mode is concentrated around the periphery of the dielectric resonator 20, and the second opening 221 connects to the outer peripheral surface of the dielectric resonator 20, the second opening 221 has the greatest impact on the resonant frequency of the TE mode. Based on this, the resonant frequency of the TE mode can be significantly increased through the second opening 221, facilitating convenient and quick adjustment of the TE mode resonant frequency, increasing the range of TE mode resonant frequency that can be increased, and making it easier to increase the TE mode resonant frequency to the required range. This facilitates the design of the multimode resonator 1 in single-cavity coupled (or uncoupled) TE mode resonant mode, improving the performance and design flexibility of the multimode resonator 1.

[0108] However, since the second opening 221 connects to 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. The second opening 221 may significantly increase the resonant frequency of the HE mode. 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 previous embodiment, this embodiment is less convenient for finely controlling the resonant frequency of the HE mode. That is, the difficulty of "controlling the resonant frequency of the HE mode to be within the passband range and close to the desired frequency band" is relatively greater.

[0109] Furthermore, since the second opening 221 is connected to at least one 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 molding convenience and molding accuracy of the dielectric resonator 20, and reduce the mold cost and the processing cost of the dielectric resonator 20.

[0110] Please see Figure 1 , Figure 8 In some embodiments of this application, at least one second opening 221 is formed on the outer peripheral surface of the dielectric resonator 20 and is disposed between the two end faces of the dielectric resonator 20.

[0111] 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 outer peripheral surface of the dielectric resonator 20 and is located between two opposite end faces of the dielectric resonator 20 along the axial direction. That is, along the axial direction of the dielectric resonator 20, the second opening 221 is not connected to either end face of the dielectric resonator 20, and both opposite ends of the second opening 221 in the axial direction of the dielectric resonator 20 are closed.

[0112] By adopting the above scheme, the second opening structure 22 can conveniently guide and control one electric field polarization direction of the HE mode along the second radial direction y through the second opening 221, and it is convenient to design related coupling structures based on the electric field polarization direction of the HE mode along the second radial direction y. However, since the second opening 221 is hidden between the two end faces of the dielectric resonator 20, the electric field polarization direction of the HE mode along the second radial direction y needs to be determined from the outer peripheral surface of the dielectric resonator 20, which is relatively less intuitive.

[0113] By adopting the above scheme, the depth direction of the second opening 221 can correspond to the second radial direction y, which facilitates the thinning of a specific region of the dielectric resonator 20 along the second radial direction y, thereby allowing the resonant frequencies of the HE mode and TE mode to be increased as needed. Furthermore, since the electric field of the TE mode is concentrated around the periphery of the dielectric resonator 20, when the second opening 221 is located on the outer peripheral surface of the dielectric resonator 20, the second opening 221 has a significant impact on the resonant frequency of the TE mode. Therefore, the resonant frequency of the TE mode can be significantly increased through the second opening 221, facilitating convenient and quick adjustment of the TE mode resonant frequency, increasing the range of TE mode resonant frequency that can be increased, and making it easier to increase the TE mode resonant frequency to the required range. This facilitates the design of the multimode resonator 1 in single-cavity coupled (or uncoupled) TE mode resonant mode as needed, improving the performance and design flexibility of the multimode resonator 1.

[0114] However, since the second opening 221 is located on the outer peripheral surface of the dielectric resonator 20, it 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. The second opening 221 may significantly increase the resonant frequency of the HE mode. Therefore, the resonant frequency of the HE mode may increase abruptly due to the significant impact of the second opening 221 on the resonant frequency of the HE mode. Compared with the embodiment where "the second opening 221 is located on the end face of the dielectric resonator 20 and between the outer peripheral surface of the dielectric resonator 20 and the central axis L of the dielectric resonator 20", this embodiment is 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 and close to the desired frequency band".

[0115] Furthermore, it should be noted that in this application, 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", can be selected to be provided when there is only one second opening 221. When there are multiple second openings 221, they can be implemented individually, in pairs, or all in combination.

[0116] It should also be noted that the embodiment in which "at least one 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" is more effective, especially in facilitating more precise control of the resonant frequency of the HE mode. Therefore, this application tends to implement this embodiment alone, that is, tends to implement it in the form of "all second openings 221 are formed 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". In particular, the combined embodiment in which "all first openings 211 and all second openings 221 are formed 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" is more effective, facilitating more precise control of the resonant frequency of the HE mode and the resonant frequency of the TE mode.

[0117] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the first opening 211 is a hole structure. For example, it can be a through hole or a blind hole, such as a circular hole, a rectangular hole, an oblong hole, an irregularly shaped hole, etc.

[0118] By adopting the above scheme and making the first opening 211 a hole structure, on the one hand, the structural regularity of the first opening 211 can be improved, the structural design of the first opening 211 can be simplified, the mold design can be facilitated, and the dielectric resonator 20 and its first opening 211 can be integrally molded through the mold, thereby improving the molding convenience and molding accuracy of the dielectric resonator 20 and the first opening structure 21. On the other hand, the hole structure has less hollowed-out part, and the hole structure has a smaller impact on the resonant frequency of the HE mode, which can avoid the resonant frequency of the HE mode increasing too much and exceeding the passband range and the required frequency band. The size, shape and position of the hole structure are easier to control and adjust precisely, thereby facilitating the precise guidance and control of one electric field polarization direction of the HE mode along the first radial x, and facilitating the precise control of the resonant frequency of the HE mode and the resonant frequency of the TE mode. This allows the multimode resonator 1 to be coupled to the two resonant modes of the single cavity HE mode as needed, or to the three resonant modes of the single cavity HE mode and the TE mode as needed, thereby improving the performance and design flexibility of the multimode resonator 1.

[0119] This embodiment is particularly suitable for use in conjunction with 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". This arrangement facilitates more precise control of the resonant frequency of the HE mode.

[0120] Of course, in other embodiments, the first opening 211 can be a groove structure, such as a straight groove, a curved groove, an arc groove, etc.

[0121] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the second opening 221 is a hole structure. For example, it can be a through hole or a blind hole, such as a circular hole, a rectangular hole, an oblong hole, an irregularly shaped hole, etc.

[0122] By adopting the above scheme and making the second opening 221 a hole structure, on the one hand, the structural regularity of the second opening 221 can be improved, the structural design of the second opening 221 can be simplified, the mold design can be facilitated, and the dielectric resonator 20 and its second opening 221 can be integrally molded through the mold, thereby improving the molding convenience and molding accuracy of the dielectric resonator 20 and the second opening structure 22. On the other hand, the hole structure has less hollowed-out part, and the hole structure has a smaller impact on the resonant frequency of the HE mode, which can avoid the resonant frequency of the HE mode increasing too much and exceeding the passband range and the required frequency band. The size, shape and position of the hole structure are easier to control and adjust precisely, thereby facilitating the precise guidance and control of one electric field polarization direction of the HE mode along the second radial direction y, and facilitating the precise control of the resonant frequency of the HE mode and the resonant frequency of the TE mode. This allows the multimode resonator 1 to be coupled to the two resonant modes of the single cavity HE mode as needed, or to the three resonant modes of the single cavity HE mode and the TE mode as needed, thereby improving the performance and design flexibility of the multimode resonator 1.

[0123] This embodiment is particularly suitable for use in conjunction with 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". This configuration allows for more precise control of the resonant frequency of the HE mode.

[0124] Of course, in other embodiments, the second opening 221 can be a groove structure, such as a straight groove, a curved groove, an arc groove, etc.

[0125] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, two first openings 211 are provided, and the two first openings 211 are symmetrically arranged about the central axis L of the dielectric resonator 20. That is, the two first openings 211 are respectively located on both sides of the central axis L of the dielectric resonator 20, the two first openings 211 have the same shape and size, and the distance between the two first openings 211 along the first radial direction x to the central axis L of the dielectric resonator 20 is also the same, so that the two first openings 211 are symmetrically arranged about the central axis L of the dielectric resonator 20.

[0126] By adopting the above scheme, by providing two first openings 211 and symmetrically arranging the two first openings 211 about the central axis L of the dielectric resonator 20, on the one hand, it is convenient to directly determine the first radial x intuitively, quickly and accurately through the line connecting the two first openings 211, without having to first locate the central axis L of the dielectric resonator 20 and then determine the first radial x through the line connecting the first opening 211 and the central axis L of the dielectric resonator 20. This facilitates intuitive, quick and accurate determination of the electric field polarization direction of the HE mode along the first radial x, and makes it convenient to design relevant coupling structures based on the electric field polarization direction of the HE mode along the first radial x. On the other hand, it facilitates the balanced, precise, and controllable adjustment of the resonant frequencies of the HE mode and the TE mode on opposite sides of the central axis L along the first radial direction x of the dielectric resonator 20 via two first openings 211. This allows for precise control of the HE mode's resonant frequency to be within the passband and close to the desired frequency band, and for precise control of whether the TE mode's resonant frequency is "within the passband and close to the same frequency band as the HE mode's resonant frequency." This allows the multimode resonator 1 to operate in either single-cavity coupled HE mode or single-cavity coupled HE and TE modes as needed, improving the performance and design flexibility of the multimode resonator 1. Furthermore, the arrangement of "two first openings 211" also facilitates the fabrication and shaping of the first opening structure 21 and the dielectric resonator 20.

[0127] Of course, in other embodiments, the first opening 211 may be one or more.

[0128] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, two second openings 221 are provided, and the two second openings 221 are symmetrically arranged about the central axis L of the dielectric resonator 20. That is, the two second openings 221 are respectively located on both sides of the central axis L of the dielectric resonator 20, the two second openings 221 have the same shape and size, and the distance between the two second openings 221 along the second radial direction y to the central axis L of the dielectric resonator 20 is also the same, so that the two second openings 221 are symmetrically arranged about the central axis L of the dielectric resonator 20.

[0129] By adopting the above scheme, by providing two second openings 221 and symmetrically arranging the two second openings 221 about the central axis L of the dielectric resonator 20, on the one hand, it is convenient to directly and intuitively, quickly and accurately determine the second radial direction y through the line connecting the two second openings 221, without having to first locate the central axis L of the dielectric resonator 20 and then determine the second radial direction y through the line connecting the second opening 221 and the central axis L of the dielectric resonator 20. This facilitates the intuitive, quick and accurate determination of the electric field polarization direction of the HE mode along the second radial direction y, and makes it convenient to design relevant coupling structures based on the electric field polarization direction of the HE mode along the second radial direction y. On the other hand, the resonant frequencies of the HE mode and the TE mode can be adjusted evenly, precisely, and controllably on opposite sides of the central axis L along the second radial direction y of the dielectric resonator 20 via two second openings 221. This allows for precise control of the HE mode's resonant frequency to be within the passband and close to the desired frequency band, and for precise control of whether the TE mode's resonant frequency is "within the passband and close to the same frequency band as the HE mode's resonant frequency." This facilitates the multimode resonator 1 to operate in either single-cavity coupled HE mode or single-cavity coupled HE and TE modes as needed, improving the performance and design flexibility of the multimode resonator 1. Furthermore, the provision of two second openings 221 also facilitates the fabrication and shaping of the second opening structure 22 and the dielectric resonator 20.

[0130] Of course, in other embodiments, the second opening 221 may be one or more.

[0131] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the multimode resonator 1 has at least three resonance modes: HE mode and TE mode. The dielectric resonator 20 includes a dielectric body 23 and a dielectric cylinder 24. The dielectric cylinder 24 is erected on the end side of the dielectric body 23 and surrounds the periphery of the dielectric body 23.

[0132] It should be noted that in this embodiment, 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 range. For example, the multimode resonator 1 can be an HE-TE three-mode resonator, an HE-TE-TM four-mode resonator, etc.

[0133] It should also 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 in the dielectric cylinder 24 as needed. The second opening 221 mentioned above can be provided in the dielectric body 23 or in the dielectric cylinder 24 as needed.

[0134] 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 9 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 14 and will 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 14. 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 14. 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.

[0135] 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 4 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.

[0136] Based on this, by adopting the above scheme, the resonant frequency of the TE mode can be adjusted by modifying the size of the resonant cavity 14, the radial dimension and height of the dielectric body 23, the number, size, and position of the first opening 211, and the number, size, and position of the second opening 221, thereby bringing the resonant frequency of the TE mode close to the center frequency of the passband. The resonant frequency of the HE mode can be lowered by adding one or two dielectric cylinders 24, and the resonant frequency of the HE mode can be adjusted by modifying the number, size, and position of the first opening 211 and the second opening 221, thus bringing the resonant frequency of the HE mode close to the center frequency of the passband. This allows the resonant frequency of the HE mode to approach and be close to the same frequency band within the passband, facilitating the implementation of single-cavity coupled HE and TE mode resonants in the multimode resonator 1, improving its performance and design flexibility.

[0137] 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.

[0138] like Figure 1 , Figure 10 As 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.

[0139] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, there are two medium cylinders 24, which are respectively erected at opposite ends of the medium body 23.

[0140] By adopting the above scheme, dielectric cylinders 24 can be respectively set at opposite ends of the dielectric body 23. This allows the capacitance between the outer peripheral wall of the dielectric resonator 20 and the inner wall of the resonator housing 10 to be increased synergistically through the two dielectric cylinders 24. This synergistically lowers the resonant frequency of the HE mode, facilitating more precise and refined control of the HE mode's resonant frequency within the passband and close to the desired frequency band. This improves the design freedom, flexibility, and performance of the multimode resonator 1. Furthermore, it can optimize and improve the distribution of the electric field within the resonant cavity 14, thereby enhancing the performance of the multimode resonator 1.

[0141] Furthermore, based on the arrangement of the dielectric body 23 and the two dielectric cylinders 24, the structural design of the dielectric resonator 20 can be optimized, the overall structural strength of the dielectric resonator 20 can be enhanced, and the structural reliability and stability of the dielectric resonator 20 and the multimode resonator 1 can be improved.

[0142] Of course, in other embodiments, a medium cylinder 24 may be provided, which may be erected on the end side of the medium body 23 facing the first wall 11, or on the end side of the medium body 23 facing away from the first wall 11.

[0143] Please see Figure 1 , Figure 2 , Figure 3 In some embodiments of this application, when the multimode resonator 1 has at least three resonance modes, namely HE mode and TE mode, the multimode resonator 1 includes a metal disk 30 and an insulating member (not shown in the figure). The metal disk 30 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 30 and the dielectric body 23 are disposed opposite to each other along the axial direction of the dielectric body 23. The distance between the metal disk 30 and the dielectric body 23 is adjustable to adjust the resonance frequency of the TE mode.

[0144] It should be noted that the metal disk 30 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 30 can be a circular disk, a polygonal disk, or other shapes. Along the axial direction of the dielectric body 23, the metal disk 30 is arranged opposite to and directly facing the dielectric body 23. The metal disk 30 is connected to the second wall 12 through an insulating member, so that the metal disk 30 is insulated from the second wall 12, so that the metal disk 30 is not grounded, so that the metal disk 30 is suspended between the second wall 12 and the dielectric body 23, so that the metal disk 30 can 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.

[0145] In some embodiments, the metal disk 30 may have a through hole, through which an insulating member may pass to connect the metal disk 30. Of course, in other embodiments, the through hole may be omitted from the metal disk 30, and the insulating member may be connected to the metal disk 30 by means of bonding, welding, snap-fitting, etc.

[0146] An insulating component is inserted through the second wall 12 and can move axially relative to the second wall 12 to move the metal disk 30 in a direction closer to or further away from the dielectric body 23, thereby adjusting the distance between the metal disk 30 and the dielectric body 23. As the distance between the metal disk 30 and the dielectric body 23 decreases, the metal disk 30 can enhance its compression effect on the magnetic field of the TE mode, thereby increasing the resonant frequency of the TE mode. In the case where a dielectric cylinder 24 is provided on the end of the dielectric body 23 facing away from the first wall 11, as the distance between the metal disk 30 and the dielectric body 23 decreases, the metal disk 30 may be located inside the dielectric cylinder 24.

[0147] By adopting the above scheme, the distance between the metal disk 30 and the dielectric body 23 can be conveniently and quickly adjusted relative to the second wall 12 by moving the insulating element along its axial direction. This allows the ungrounded metal disk 30 to move closer to or further away from the dielectric body 23 via the insulating element. Based on this, the compression effect of the metal disk 30 on the magnetic field of the TE mode can be adjusted by regulating the distance between the metal disk 30 and the dielectric body 23, thereby achieving independent and fine adjustment of the resonant frequency of the TE mode. Tuning is convenient, quick, and precise. In other words, this embodiment allows independent tuning of the resonant frequency of the TE mode via the ungrounded metal disk 30, with minimal impact on the resonant frequency of the HE mode. Specifically, the smaller the distance between the metal disk 30 and the dielectric body 23, the more the metal disk 30 compresses the magnetic field of the TE mode, resulting in a higher resonant frequency of the TE mode; conversely, the larger the distance between the metal disk 30 and the dielectric body 23, the weaker the compression effect of the metal disk 30 on the magnetic field of the TE mode, resulting in a lower resonant frequency of the TE mode.

[0148] In addition, the compression effect of the metal disk 30 on the magnetic field of the TE mode can be enhanced by replacing it with a larger metal disk 30, thereby increasing the resonant frequency of the TE mode.

[0149] Please see Figure 1 , Figure 2 In some embodiments of this application, the multimode resonator 1 includes a ceramic base 40, which is separately connected between the dielectric resonator 20 and the first wall 11.

[0150] It should be noted that the ceramic base 40 is made of ceramic material and is a non-metallic, insulating structure. In some embodiments, the ceramic base 40 may be an alumina base. Since both the ceramic base 40 and the dielectric resonator 20 are non-metallic, they are easily connected and fixed, improving the connection strength, reliability, and stability between them. The connection between the ceramic base 40 and the dielectric resonator 20 can be achieved through methods such as, but not limited to, bonding and welding.

[0151] Furthermore, due to the superior strength and impact resistance of the ceramic base 40, it is easier to connect and fix the ceramic base 40 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 40 and the first wall 11 can be achieved by, but is not limited to, bonding, welding, riveting, or screw fastening.

[0152] By adopting the above solution, the ceramic base 40, 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 40 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 40, 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 40 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 40.

[0153] Furthermore, since the ceramic base 40 is an insulating structure, the dielectric resonator 20 is connected and fixed to the first wall 11 via the ceramic base 40, 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.

[0154] 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.).

[0155] Please see Figure 1 , Figure 2 , Figure 3 In some embodiments of this application, the multimode resonator 1 includes a first adjusting screw 50, which is threaded to the resonator housing 10 and disposed on a first radial direction x.

[0156] It should be noted that, since the first opening structure 21 can cause one electric field polarization direction of the HE mode to be along the first radial direction x, the first adjusting screw 50 provided on the first radial direction x is used to adjust the resonant frequency of the submode whose electric field polarization direction is along the first radial direction x. 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 direction x (please refer to the following). Figure 5 Therefore, the first adjusting screw 50 located on the first radial direction x is used to adjust HE. ∥ The mode's resonant frequency can be adjusted by approximately 15 MHz.

[0157] The number of first adjusting screws 50 may be one or more. Each first adjusting screw 50 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). Alternatively, the first adjusting screw 50 may be directly threaded into a threaded hole in the corresponding wall portion; or, a first mounting member (not shown in the figure) may be embedded in the corresponding wall portion, and the first adjusting screw 50 may be threaded into a threaded hole in the first mounting member. The first adjusting screw 50 is grounded based on its connection to the resonator housing 10.

[0158] Based on the first adjusting screw 50 being positioned in the first radial direction x, the specific position of the first adjusting screw 50 relative to the dielectric resonator 20 can be flexibly set. For example... Figure 2 , Figure 3 As shown, in some embodiments, the first adjusting screw 50 may be disposed around the periphery of the dielectric resonator 20 along the first radial direction x. In this case, when there are multiple first adjusting screws 50, the multiple first adjusting screws 50 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 adjusting screw 50 may be disposed corresponding to the dielectric resonator 20 along the axial direction of the dielectric resonator 20. In this case, the first adjusting screw 50 may be spaced apart from the dielectric resonator 20 along the axial direction of the dielectric resonator 20, and the first adjusting screw 50 may also extend into the dielectric resonator 20 (at this time, the dielectric resonator 20 may have a clearance hole for the first adjusting screw 50 to extend into; or, the first adjusting screw 50 may also extend into the first opening 211, and the first opening 211 may be used as a clearance hole for the first adjusting screw 50 to extend into.

[0159] By adopting the above scheme, the length of the portion of the first adjusting screw 50 extending into the resonator housing 10 can be conveniently and quickly adjusted by screwing it in or out. Based on this, by adjusting the length of the portion of the first adjusting screw 50 extending into the resonator housing 10, the electric field of the submode (e.g., HE mode) along the first radial x-direction of the HE mode's electric field polarization direction can be affected. ∥ The electric field of the mode can be used to independently and finely adjust the resonant frequency of the submode along the first radial x-axis of the HE mode (e.g., HE). ∥ The resonant frequency of the HE mode is easily, quickly, and precisely tuned. Specifically, this embodiment allows independent tuning of the resonant frequency of the submode along the first radial direction x of the HE mode via a grounded first adjusting screw 50 located in the first radial direction x, without significantly affecting the resonant frequency of the submode along the second radial direction y of the HE mode or the resonant frequency of the TE mode. The longer the portion of the first adjusting screw 50 extending into the resonator housing 10, the lower the resonant frequency of the submode along the first radial direction x of the HE mode; conversely, the shorter the portion of the first adjusting screw 50 extending into the resonator housing 10, the higher the resonant frequency of the submode along the first radial direction x of the HE mode.

[0160] Please see Figure 1 , Figure 2 , Figure 3 In some embodiments of this application, the multimode resonator 1 includes a second adjusting screw 60, which is threaded to the resonator housing 10 and disposed on the second radial direction y.

[0161] It should be noted that, since the second opening structure 22 can cause another electric field polarization direction of the HE mode to be along the second radial direction y, the second adjusting screw 60 provided on the second radial direction y is used to adjust the resonant frequency of the submode of the HE mode whose electric field polarization direction is along the second radial direction y. For example, the second opening structure 22 can cause the HE mode to... ⊥ 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 adjusting screw 60 located on the second radial direction y is used to adjust HE. ⊥ The mode's resonant frequency can be adjusted by approximately 15 MHz.

[0162] The number of second adjusting screws 60 may be one or more. Each second adjusting screw 60 can 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). Alternatively, the second adjusting screw 60 can be directly threaded into a threaded hole in the corresponding wall portion; or, a second mounting member (not shown in the figure) can be embedded in the corresponding wall portion, and the second adjusting screw 60 can be threaded into a threaded hole in the second mounting member. The second adjusting screw 60 is grounded based on its connection to the resonator housing 10.

[0163] Based on the second adjusting screw 60 being positioned in the second radial direction y, the specific position of the second adjusting screw 60 relative to the dielectric resonator 20 can be flexibly set. For example... Figure 2 , Figure 3 As shown, in some embodiments, the second adjusting screw 60 may be disposed around the periphery of the dielectric resonator 20 along the second radial direction y. In this case, when there are multiple second adjusting screws 60, the multiple second adjusting screws 60 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 adjusting screw 60 may be disposed corresponding to the dielectric resonator 20 along the axial direction of the dielectric resonator 20. In this case, the second adjusting screw 60 may be spaced apart from the dielectric resonator 20 along the axial direction of the dielectric resonator 20, and the second adjusting screw 60 may also extend into the dielectric resonator 20 (at this time, the dielectric resonator 20 may have a clearance hole for the second adjusting screw 60 to extend into; or, the second adjusting screw 60 may also extend into the second opening 221, and the second opening 221 may be used as a clearance hole for the second adjusting screw 60 to extend into.

[0164] By adopting the above scheme, the length of the portion of the second adjusting screw 60 extending into the resonator housing 10 can be conveniently and quickly adjusted by screwing it in or out. Based on this, by adjusting the length of the portion of the second adjusting screw 60 extending into the resonator housing 10, the electric field of the submode (e.g., HE mode) along the second radial y-direction of the HE mode's electric field polarization direction can be affected. ⊥ The electric field of the mode can be used to independently and finely adjust the resonant frequency of the submode along the second radial direction y of the HE mode (e.g., HE). ⊥The resonant frequency of the HE mode is easily, quickly, and precisely tuned. Specifically, this embodiment allows independent tuning of the resonant frequency of the submode of the HE mode along the second radial direction y via a grounded second adjusting screw 60 located in the second radial direction y, without significantly affecting the resonant frequency of the submode of the HE mode along the first radial direction x or the resonant frequency of the TE mode. The longer the portion of the second adjusting screw 60 extends into the resonator housing 10, the lower the resonant frequency of the submode of the HE mode along the second radial direction y; conversely, the shorter the portion of the second adjusting screw 60 extending into the resonator housing 10, the higher the resonant frequency of the submode of the HE mode along the second radial direction y.

[0165] Please see Figure 11 Some embodiments of this application provide a filter, including the multimode resonator 1 provided in the embodiments of this application.

[0166] 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.

[0167] By adopting the above scheme, the filter can be easily coupled using the multimode resonator 1 provided in this application embodiment, thereby improving the filter's performance and power capacity. In particular, since the multimode resonator 1 provided in this application embodiment can precisely control the two electric field polarization directions of the HE mode along a preset direction, the two electric field polarization directions of the HE mode can be intuitively determined. Therefore, it is convenient to construct the relevant coupling design of the HE mode between the multimode resonator 1 and adjacent resonators.

[0168] For example, such as Figure 11 , Figure 12 , Figure 13 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 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.

[0169] 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 two resonance modes: HE mode and H mode. The multimode resonator includes: Resonator housing; A dielectric resonator is disposed within the resonator housing and connected to the first wall of the resonator housing. The dielectric resonator has a first opening structure in a first radial direction and a second opening structure in a second radial direction. The first radial direction and the second radial direction intersect perpendicularly at the central axis of the dielectric resonator. 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.

2. The multimode resonator as described in claim 1, 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.

3. The multimode resonator as described in claim 1, characterized in that, At least one of the first openings 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; And / or, at least one of the first openings is formed on the outer peripheral surface of the dielectric resonator and communicates with at least one end face of the dielectric resonator; And / or, at least one of the first openings is formed on the outer peripheral surface of the dielectric resonator and is located between the two end faces of the dielectric resonator.

4. The multimode resonator as described in claim 1, characterized in that, At least one of the second openings 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. And / or, at least one of the second openings is formed on the outer peripheral surface of the dielectric resonator and communicates with at least one end face of the dielectric resonator; And / or, at least one of the second openings is formed on the outer peripheral surface of the dielectric resonator and is located between the two end faces of the dielectric resonator.

5. The multimode resonator as described in claim 1, characterized in that, The first opening is a hole structure; and / or, the second opening is a hole structure.

6. The multimode resonator as described in claim 1, characterized in that, There are two first openings, and the two first openings are arranged symmetrically about the central axis of the dielectric resonator; And / or, there are two second openings, which are arranged symmetrically about the central axis of the dielectric resonator.

7. The multimode resonator as described in any one of claims 1-6, characterized in that, The multimode resonator has at least three resonance modes: HE mode and TE mode. The dielectric resonator includes a dielectric body and a dielectric cylinder. The dielectric cylinder is erected on one end of the dielectric body and surrounds the periphery of the dielectric body.

8. The multimode resonator as described in claim 7, characterized in that, Two medium cylinders are provided, and the two medium cylinders are respectively erected at opposite ends of the medium body.

9. The multimode resonator as described in claim 7, characterized in that, The multimode resonator includes a metal disk and an insulating component. The metal disk is connected to the second wall of the resonator housing through the insulating component. The second wall is disposed opposite to the first wall. The metal disk and the dielectric body are disposed opposite to each other along the axial direction of the dielectric body. The distance between the metal disk and the dielectric body is adjustable to adjust the resonant frequency of the TE mode.

10. 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.

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

12. A filter, characterized in that, Including the multimode resonator as described in any one of claims 1-11.

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