Multi-mode resonator and filter

Abstract

The utility model relates to the field of communication, and provides a multimode resonator and a filter. The multi-mode resonator at least has two resonant modes of an HE mode, the multi-mode resonator comprises a dielectric resonant part and a resonator shell, and the dielectric resonant part is of a rotational symmetry structure; the dielectric resonance piece is arranged in the resonator shell, the resonator shell comprises two substrates oppositely arranged in the axial direction of the dielectric resonance piece and a shell body connected between the two substrates, and a protruding part is arranged on the inner wall of the shell body in a protruding mode. The number of the protruding parts is two, the two protruding parts are arranged on the same circumference around the central axis of the medium resonance piece, and the central angle between the two protruding parts is 90 degrees. Or, the number of the protruding parts is at least three, and the protruding parts are circumferentially arranged at equal angles around the central axis of the dielectric resonance piece. Based on the above structure, the assembling angle and the assembling direction do not need to be accurately checked when the dielectric resonance piece is assembled in the resonator shell, and the assembling convenience, the assembling efficiency and the assembling yield of the dielectric resonance piece can be improved.

Description

Technical Field

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

[0002] In some cases, multimode resonators have at least two resonance modes: HE mode and H mode. A multimode resonator includes a resonator housing and an irregularly shaped dielectric resonator disposed within the resonator housing. When assembling the dielectric resonator into the resonator housing, the assembly angle and direction need to be precisely checked. The requirements for assembly angle, assembly direction, and assembly tolerance are high, resulting in poor assembly convenience, assembly efficiency, and assembly yield of the dielectric resonator. Consequently, multimode resonators are prone to performance defects due to poor assembly of the dielectric resonator. Utility Model Content

[0003] This application provides a multimode resonator, which aims to solve the problem that the assembly convenience, assembly efficiency and assembly yield of dielectric resonators are poor, which makes the multimode resonator prone to poor performance due to poor assembly of dielectric resonators.

[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] The dielectric resonator has a rotationally symmetric structure.

[0007] A resonator housing, wherein the dielectric resonator is disposed within the resonator housing, the resonator housing includes two substrates disposed opposite to each other along the axial direction of the dielectric resonator, and a shell body connected between the two substrates, wherein the inner wall of the shell body is provided with a protrusion;

[0008] The protrusion is provided in two parts, and the two protrusions are arranged on the same circumference around the central axis of the dielectric resonator, and the central angle between the two protrusions is 90°; or, the protrusion is provided in at least three parts, and each protrusion is arranged in a circle with equal angles around the central axis of the dielectric resonator.

[0009] In some embodiments, the outer peripheral wall of the dielectric resonator directly abuts against each of the protrusions.

[0010] In some embodiments, the protrusion has an abutting surface on the side facing the dielectric resonator, and the abutting surface abuts against the outer peripheral wall of the dielectric resonator.

[0011] In some embodiments, the dielectric resonator is welded and fixed to each of the protrusions.

[0012] In some embodiments, the dielectric resonator is indirectly abutted to each of the protrusions via an abutting member.

[0013] In some embodiments, the dielectric resonator is suspended between the two substrates.

[0014] In some embodiments, the dielectric resonator directly abuts against the two substrates, so that the multimode resonator has at least three resonance modes: HE mode and TM mode.

[0015] In some embodiments, the dielectric resonator is indirectly abutted to each of the substrates via the abutting member, so that the multimode resonator has at least three resonance modes: HE mode and TM mode.

[0016] In some embodiments, the dielectric resonator and each of the protrusions are spaced at the same distance, and the distance between them is less than or equal to 3 mm.

[0017] In some embodiments, the protrusions are provided in four forms.

[0018] Secondly, a filter is provided, including the multimode resonator provided in the embodiments of this application.

[0019] The advantages of the multimode resonator provided in this application are as follows:

[0020] The multimode resonator provided in this application embodiment, by making the dielectric resonator a rotationally symmetric structure, ensures that the structure and electromagnetic field distribution of the dielectric resonator are essentially the same in different directions around the central axis of the dielectric resonator, and thus lacks directionality. Based on this, when assembling the dielectric resonator into the resonator housing, there is no need to precisely check the assembly angle and direction, reducing the requirements for assembly angle, direction, and tolerance. Assembly can be completed directly and quickly, thereby improving the assembly convenience, efficiency, and yield of the dielectric resonator. This also improves the assembly convenience, efficiency, and yield of the multimode resonator, reducing the risk of poor performance due to assembly defects (such as inaccurate assembly angles, inaccurate assembly directions, or large assembly tolerances), and improving the stability and consistency of the multimode resonator's performance indicators.

[0021] Furthermore, the multimode resonator can also be configured by providing two protrusions on the inner wall of the housing body to load metal in two radial directions perpendicular to the dielectric resonator; or by providing at least three protrusions on the inner wall of the housing body to load metal evenly in the circumferential direction of the dielectric resonator. Based on this, the resonant frequency of the HE dual-mode can be lowered via each protrusion, thereby exciting a pair of usable, orthogonal HE dual-modes in conjunction with the dielectric resonator. This ensures that the resonant frequencies of the HE dual-modes are within the passband and close to the same frequency band, causing one polarization direction of the HE mode to extend along the direction of one of the protrusions, and causing the other polarization direction of the HE mode to be approximately perpendicular to one of the polarization directions of the HE mode. Therefore, the multimode resonator can couple at least two orthogonal high-Q resonant modes of HE mode in a single cavity, and can achieve at least two-order filtering effects, which is equivalent to the filtering effect of at least two single-mode resonators, that is, equivalent to the filtering effect of at least two microwave resonators. This can improve the performance and space utilization of the multimode resonator, and is conducive to reducing the volume and size of the multimode resonator, and to miniaturization and weight reduction of the multimode resonator.

[0022] Furthermore, since the dielectric resonator has a rotationally symmetric structure, the processing and assembly errors of the dielectric resonator can be reduced, thereby improving the processing and assembly accuracy of the dielectric resonator. Also, since the protrusion is integrally formed on the inner wall of the shell body, the processing error of the protrusion can be reduced, thereby improving the processing accuracy of the protrusion. Therefore, the multimode resonator can improve the overall accuracy and reduce the total error, thereby improving the consistency, quality and yield of the multimode resonator, and reducing the defect rate and debugging cost of the multimode resonator. Attached Figure Description

[0023] To clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A three-dimensional schematic diagram of a multimode resonator provided for some embodiments of this application;

[0025] Figure 2 for Figure 1 A cross-sectional view of the provided multimode resonator;

[0026] Figure 3 for Figure 1 A partial structural schematic diagram of the provided multimode resonator;

[0027] Figure 4 for Figure 3 A top view of the provided multimode resonator;

[0028] Figure 5 A top view of a multimode resonator provided for other embodiments of this application, wherein two protrusions are provided;

[0029] Figure 6 A cross-sectional view of a multimode resonator provided in some other embodiments of this application, wherein the dielectric resonator is indirectly abutted to each protrusion via an abutting member;

[0030] Figure 7 A cross-sectional view of a multimode resonator provided in some other embodiments of this application, wherein the dielectric resonator directly abuts against two substrates;

[0031] Figure 8 A cross-sectional view of a multimode resonator provided in some other embodiments of this application, wherein the dielectric resonator is indirectly abutted to each substrate via abutting components;

[0032] Figure 9 This is a top view of a multimode resonator provided in some other embodiments of this application, wherein the dielectric resonator and each protrusion are spaced at the same distance.

[0033] The following are the labeling elements in the figure:

[0034] 10 - Dielectric resonator, L - Central axis of dielectric resonator; 20 - Resonator housing, 21 - Substrate, 22 - Housing body, 221 - Protrusion, 2211 - Abutting surface, 23 - Inner cavity; 30 - Abutting component; α - Central angle between two protrusions, d - Spacing distance, x - First radial direction, y - Second radial direction. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] In this application, "central axis" refers to a line that passes through the geometric center of the corresponding structure.

[0040] 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.

[0041] 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 be HE (Hybrid Electromagnetic Mode), TM (Transverse Magnetic), TE (Transverse Electric), TEM (Transverse Electric and Magnetic Field), etc. For example, a HE two-mode resonator supports two HE modes within its passband; a HE-TM three-mode resonator supports both HE and TM modes; a HE-TE three-mode resonator supports both HE and TE modes; and a HE-TE-TM four-mode resonator supports all four modes (HE, TE, and TM) within its passband.

[0042] In some cases, multimode resonators have at least two resonance modes: HE mode and H mode. A multimode resonator includes a resonator housing and an irregularly shaped dielectric resonator disposed within the resonator housing. When assembling the dielectric resonator into the resonator housing, the assembly angle and direction need to be precisely checked. The requirements for assembly angle, assembly direction, and assembly tolerance are high, resulting in poor assembly convenience, assembly efficiency, and assembly yield of the dielectric resonator. This makes the multimode resonator prone to poor performance due to poor assembly of the dielectric resonator (such as inaccurate assembly angle, inaccurate assembly direction, large assembly tolerance, etc.).

[0043] The embodiments provided in this application will solve the above problems.

[0044] To illustrate the technical solutions provided in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0045] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 Some embodiments of this application provide a multimode resonator, which has at least two resonance modes: HE mode and [other resonator modes]. The multimode resonator includes a dielectric resonator 10 and a resonator housing 20. The dielectric resonator 10 has a rotationally symmetric structure. The dielectric resonator 10 is disposed within the resonator housing 20. The resonator housing 20 includes two substrates 21 disposed opposite to each other along the axial direction of the dielectric resonator 10, and a shell body 22 connected between the two substrates 21. The inner wall of the shell body 22 has a protrusion 221. Wherein, [further details are needed]. Figure 3 , Figure 5As shown, there are two protrusions 221, which are arranged around the central axis L of the dielectric resonator 10 on the same circumference, and the central angle α between the two protrusions 221 is 90°; or, as Figure 3 , Figure 4 As shown, there are at least three protrusions 221, and each protrusion 221 is arranged in a circular shape with equal angles around the central axis L of the dielectric resonator 10.

[0046] It should be noted that a multimode resonator has at least two orthogonal high-Q resonant modes, namely HE mode and HE mode. That is, a multimode resonator can support at least HE mode within its passband. For example, a multimode resonator can be a HE dual-mode resonator, a HE-TM tri-mode resonator, a HE-TE tri-mode resonator, a HE-TE-TM quad-mode resonator, and so on.

[0047] It should also be noted that the multimode resonator includes a resonator housing 20. The resonator housing 20 is entirely made of metal, or its surface is covered with a metal layer (the portion of the resonator housing 20 located within the metal layer can be made of a non-metallic material). The resonator housing 20 provides shielding to prevent signal leakage. The resonator housing 20 has an internal cavity 23 (which can be an air cavity). The shape and size of the resonator housing 20 can be flexibly configured as needed, as can the shape and size of the internal cavity 23. For example, the internal cavity 23 can be, but is not limited to, a rectangular cavity, a square cavity, a polygonal cylindrical cavity, a cylindrical cavity, etc.

[0048] The multimode resonator also includes a dielectric resonator 10. The dielectric resonator 10 is a resonator made of a dielectric material. The dielectric resonator 10 can be a ceramic dielectric resonator or a dielectric resonator made of other materials. The dielectric resonator 10 is disposed within the resonator housing 20. Optionally, the dielectric resonator 10 can be centrally arranged within the resonator housing 20 (i.e., within the inner cavity 23). The dielectric resonator 10 is connected to at least one wall of the resonator housing 20 and fixed relative to the resonator housing 20. The dielectric resonator 10 and at least one wall of the resonator housing 20 can be directly or indirectly connected, and can be either a detachable or fixed connection.

[0049] It should also be noted that the dielectric resonator 10 has a rotationally symmetric structure about its central axis, meaning that each part of the dielectric resonator 10 is rotationally symmetric about its central axis. For example, the dielectric resonator 10 can be a circular rod, a circular cylinder, a regular polygonal rod (e.g., a square rod), a regular polygonal cylinder, etc. Alternatively, the dielectric resonator 10 may include multiple circular cylinders stacked sequentially along its axial direction. Another example is that the dielectric resonator 10 may include multiple regular polygonal cylinders stacked sequentially along its axial direction. Yet another example is that the dielectric resonator 10 has an opening structure, and the opening structure is also rotationally symmetric about the central axis L of the dielectric resonator 10. Furthermore, a central hole may or may not be provided at the central axis L of the dielectric resonator 10, and so on.

[0050] Since the dielectric resonator 10 has a rotationally symmetric structure, its structure and electromagnetic field distribution are basically the same in different directions around the central axis L of the dielectric resonator 10, and it does not have directionality. Therefore, when assembling the dielectric resonator 10 into the resonator housing 20, there is no need to precisely check the assembly angle and assembly direction, and the assembly can be completed directly and quickly.

[0051] It should also be noted that the resonator housing 20 has two substrates 21, which are arranged opposite each other along the axial direction of the dielectric resonator 10. In practical applications, the resonator housing 20 can be placed with either substrate 21 facing upwards, or with either substrate 21 facing left, right, forward, or backwards.

[0052] The resonator housing 20 also includes a housing body 22 connected between two substrates 21, and the housing body 22 and the two substrates 21 together enclose a closed inner cavity 23. The housing body 22 is integrally connected to one of the substrates 21, and the housing body 22 is separately connected to the other substrate 21; or, the housing body 22 is separately connected to the two substrates 21 respectively.

[0053] The shell body 22 surrounds the periphery of the dielectric resonator 10. The inner wall of the shell body 22 is provided with a plurality of protrusions 221, which are distributed at intervals around the periphery of the dielectric resonator 10. The protrusions 221 are integrally formed on the inner wall of the shell body 22. The specific forming method of the protrusions 221 is not limited, such as stamping, injection molding, machining, etc.

[0054] like Figure 3 , Figure 5As shown, in one possible embodiment, there are two protrusions 221, which are arranged on the same circumference around the central axis L of the dielectric resonator 10. That is, the two protrusions 221 are arranged on the same circumference with the central axis L of the dielectric resonator 10 as the center line. The central angle α between the two protrusions 221 is 90°, meaning the two protrusions 221 are arranged in unequal angles around the central axis L of the dielectric resonator 10, and the central angle α between the two protrusions 221 on the same circumference with the central axis L of the dielectric resonator 10 as the center line is 90°. Based on this, metal can be loaded onto the two protrusions 221 in two radial directions perpendicular to each other on the dielectric resonator 10 to lower the resonant frequency. This, in conjunction with the dielectric resonator 10, excites a pair of usable, orthogonal HE dual modes, thereby ensuring that the resonant frequencies of the HE dual modes are within the passband and close to the same frequency band. Furthermore, it ensures that one polarization direction of the HE mode follows the extension direction of one of the protrusions 221, and the other polarization direction follows the extension direction of the other protrusion 221. The extension direction of the protrusion 221 refers to the direction in which the protrusion 221 extends from the inner wall of the shell body 22 towards the central axis L of the dielectric resonator 10.

[0055] like Figure 3 , Figure 4 As shown, in another possible embodiment, at least three protrusions 221 are provided, each protrusion 221 arranged in a uniformly angular circumferential arrangement around the central axis L of the dielectric resonator 10. That is, each protrusion 221 is arranged on the same circumference with the central axis L of the dielectric resonator 10 as the center line, and is arranged in a uniformly angular circumferential arrangement. Based on this, each protrusion 221 can uniformly load metal around the circumference of the dielectric resonator 10 to lower the resonant frequency, and cooperate with the dielectric resonator 10 to excite a pair of usable, orthogonal HE dual modes. This can cause the resonant frequencies of the HE dual modes to be within the passband and close to the same frequency band, and can cause one polarization direction of the HE mode to be along the extension direction of one of the protrusions 221, and cause the other polarization direction of the HE mode to be approximately perpendicular to one of the polarization directions of the HE mode.

[0056] In summary, the multimode resonator provided in this application embodiment, by making the dielectric resonator 10 a rotationally symmetric structure, ensures that the structure and electromagnetic field distribution of the dielectric resonator 10 are essentially the same in different directions around the central axis L of the dielectric resonator 10, and thus lacks directionality. Based on this, when assembling the dielectric resonator 10 into the resonator housing 20, there is no need to precisely check the assembly angle and direction, reducing the requirements for assembly angle, direction, and tolerance. Assembly can be completed directly and quickly, thereby improving the assembly convenience, efficiency, and yield of the dielectric resonator 10. This also improves the assembly convenience, efficiency, and yield of the multimode resonator, reducing the risk of poor performance due to assembly defects in the dielectric resonator 10 (e.g., inaccurate assembly angle, inaccurate assembly direction, large assembly tolerance, etc.), and improving the stability and consistency of the multimode resonator's performance indicators.

[0057] Furthermore, the multimode resonator can also load metal onto two radially perpendicular directions of the dielectric resonator 10 via two protrusions 221 protruding from the inner wall of the housing body 22; or it can load metal onto the dielectric resonator 10 circumferentially via at least three protrusions 221 protruding from the inner wall of the housing body 22. Based on this, the resonant frequency of the HE dual-mode can be lowered via each protrusion 221, thereby exciting a pair of usable, orthogonal HE dual-modes with the dielectric resonator 10. This ensures that the resonant frequencies of the HE dual-modes are within the passband and close to the same frequency band, causing one polarization direction of the HE mode to extend along the extension direction of one of the protrusions 221, and causing the other polarization direction of the HE mode to be approximately perpendicular to one of the polarization directions of the HE mode. Therefore, the multimode resonator can couple at least two orthogonal high-Q resonant modes of HE mode in a single cavity, and can achieve at least two-order filtering effects, which is equivalent to the filtering effect of at least two single-mode resonators, that is, equivalent to the filtering effect of at least two microwave resonators. This can improve the performance and space utilization of the multimode resonator, and is conducive to reducing the volume and size of the multimode resonator, and to miniaturization and weight reduction of the multimode resonator.

[0058] Furthermore, since the dielectric resonator 10 has a rotationally symmetric structure, the processing and assembly errors of the dielectric resonator 10 can be reduced, thereby improving the processing and assembly accuracy of the dielectric resonator 10. Also, since the protrusion 221 is integrally formed on the inner wall of the shell body 22, the processing error of the protrusion 221 can be reduced, thereby improving the processing accuracy of the protrusion 221. Therefore, the multimode resonator can improve the overall accuracy and reduce the total error, thereby improving the consistency, quality and yield of the multimode resonator, and reducing the defect rate and debugging cost of the multimode resonator.

[0059] Furthermore, the two resonance modes, HE and HE, of the multimode resonator can be tuned independently without affecting each other. The specific tuning method is not limited. For example, in some embodiments, the multimode resonator includes a tuning screw, which is threaded to the resonator housing 20 and located in any polarization direction of the HE mode. The tuning screw is used to adjust the resonant frequency of the HE mode submode in its polarization direction.

[0060] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the outer peripheral wall of the dielectric resonator 10 directly abuts against each protrusion 221. That is, the outer peripheral wall of the dielectric resonator 10 directly abuts against the side of each protrusion 221 facing the dielectric resonator 10.

[0061] By adopting the above scheme, and by having the outer peripheral wall of the dielectric resonator 10 directly abut against each protrusion 221, on the one hand, the additional components between the dielectric resonator 10 and the protrusions 221 can be simplified, thereby simplifying and optimizing the structure of the multimode resonator, reducing the number of parts and assembly materials, simplifying and optimizing the assembly process, facilitating the miniaturization, simplification, and lightweighting of the multimode resonator, and improving the integration, consistency, and reliability of the multimode resonator. On the other hand, when the dielectric resonator 10 is assembled into the resonator housing 20, it is not necessary to precisely check the assembly angle and direction of the dielectric resonator 10. The protrusions 221 can directly and quickly complete the assembly between the dielectric resonator 10 and the resonator housing 20, reducing assembly complexity and improving assembly convenience, assembly efficiency, and assembly yield. On the one hand, it facilitates the direct and efficient loading of metal onto the outer peripheral wall of the dielectric resonator 10 by each protrusion 221, facilitates the formation of electromagnetic field constraints by each protrusion 221 in a specific direction, facilitates the stable excitation of a pair of usable, orthogonal HE dual modes by each protrusion 221 in conjunction with the dielectric resonator 10, effectively reduces the resonant frequency of the HE dual modes, and makes the resonant frequency of the HE dual modes within the passband and close to the same frequency band, can accurately control the polarization direction of the HE dual modes, and can reduce the risk of resonant frequency drift or Q value fluctuation caused by the different gaps between the dielectric resonator 10 and each protrusion 221, thereby improving the stability and controllability of the HE dual-mode resonant mode and optimizing the performance of the multimode resonator. On the other hand, the protrusions 221 can form physical support for the dielectric resonator 10, which can improve the stability of the position and state of the dielectric resonator 10, thereby improving the stability, reliability, and consistency of the structure and performance of the multimode resonator.

[0062] Please see Figure 2 , Figure 3 , Figure 4In some embodiments of this application, the protrusion 221 has an abutment surface 2211 on the side facing the dielectric resonator 10, and the abutment surface 2211 abuts against the outer peripheral wall of the dielectric resonator 10.

[0063] It should be noted that the protrusion 221 has an abutment surface 2211 on the side facing the dielectric resonator 10. Depending on the outer peripheral wall of the dielectric resonator 10, the abutment surface 2211 may be an arc surface, a plane, or a bent surface formed by an angle between two planes, with the main requirement being that "the abutment surface 2211 can fit and abut against the outer peripheral wall of the dielectric resonator 10".

[0064] For example, when the dielectric resonator 10 is a circular rod or a circular cylinder, or when the dielectric resonator 10 includes a plurality of circular cylinders stacked sequentially along its axial direction, the abutment surface 2211 is an arc surface, so that the abutment surface 2211 can fit and abut against the outer peripheral wall of the dielectric resonator 10.

[0065] For example, when the dielectric resonator 10 is a regular polygonal rod (e.g., a square rod) or a regular polygonal column, or when the dielectric resonator 10 includes a plurality of regular polygonal columns stacked sequentially along its axial direction, the abutment surface 2211 is a plane, or the abutment surface 2211 is a bent surface formed by an included angle between two planes, so that the abutment surface 2211 can fit and abut against the outer peripheral wall of the dielectric resonator 10.

[0066] By adopting the above solution, based on the previous embodiment, by making the contact surface 2211 fit snugly against the outer peripheral wall of the dielectric resonator 10, the contact area between the protrusion 221 and the dielectric resonator 10 can be increased, and the air gap between the protrusion 221 and the dielectric resonator 10 can be basically eliminated. Based on this, the contact strength and reliability between the protrusion 221 and the dielectric resonator 10 can be strengthened, the support effect of each protrusion 221 on the dielectric resonator 10 can be enhanced, the position and state stability of the dielectric resonator 10 can be improved, and the risk of displacement of the dielectric resonator 10 between the protrusions 221 can be reduced. This improves the structural and performance stability, reliability, and consistency of the multimode resonator. Furthermore, because the contact surface 2211 is completely fitted against the outer peripheral wall of the dielectric resonator 10, the stress between the protrusion 221 and the dielectric resonator 10 can be dispersed, thereby reducing the risk of wear or deformation of the dielectric resonator 10 due to point contact and stress concentration. This improves the reliability and service life of the dielectric resonator 10 and the multimode resonator.

[0067] Of course, in other embodiments, part of the abutting surface 2211 is in close contact with the outer peripheral wall of the dielectric resonator 10, and there is a gap between the other part of the abutting surface 2211 and the outer peripheral wall of the dielectric resonator 10. With this arrangement, the protrusion 221 can also directly abut with the outer peripheral wall of the dielectric resonator 10.

[0068] Please see Figure 2 , Figure 3 , Figure 4 In some embodiments of this application, the dielectric resonator 10 is welded and fixed to each protrusion 221.

[0069] By adopting the above scheme, based on the principle that "the outer peripheral wall of the dielectric resonator 10 directly abuts against each protrusion 221", the dielectric resonator 10 can be conveniently and quickly fixed to each protrusion 221 by welding. This also strengthens the connection strength, firmness, reliability, and stability between the protrusions 221 and the dielectric resonator 10, and enhances the support and fixing effect of each protrusion 221 on the dielectric resonator 10. This improves the stability of the position and state of the dielectric resonator 10, significantly reduces the risk of displacement of the dielectric resonator 10 within the resonator housing 20 and between the protrusions 221, and improves the stability, reliability, and consistency of the structure and performance of the multimode resonator.

[0070] Of course, in other embodiments, based on the premise that "the outer peripheral wall of the dielectric resonator 10 directly abuts against each protrusion 221", the dielectric resonator 10 and each protrusion 221 can be interference-fitted, or other fixed connection methods (such as bonding) can be used, so that the dielectric resonator 10 can be stably positioned and in a stable state within the resonator housing 20 and between each protrusion 221, thereby making the dielectric resonator 10 substantially fixed relative to the resonator housing 20. In other embodiments, the dielectric resonator 10 can be connected and fixed to the substrate 21 of the resonator housing 20, thereby achieving fixation relative to the resonator housing 20.

[0071] Please see Figure 6 In some embodiments of this application, the dielectric resonator 10 is indirectly abutted to each protrusion 221 via the abutting member 30.

[0072] It should be noted that the dielectric resonator 10 and each protrusion 221 are indirectly abutted together, and the dielectric resonator 10 and each protrusion 221 are indirectly abutted together through abutting parts 30 of the same structure, shape and size. The abutting parts 30 can be metal or non-metal.

[0073] By adopting the above scheme, and by ensuring that the dielectric resonator 10 and each protrusion 221 are indirectly engaged through abutting components 30 of the same structure, shape, and size, the loading of metal on each protrusion 221 in a specific direction is essentially the same, without significant differences. This facilitates the stable excitation of a pair of usable, orthogonal HE dual modes by each protrusion 221 in conjunction with the dielectric resonator 10. It also ensures that the resonant frequencies of the HE dual modes are within the passband and close to the same frequency band, allowing for relatively precise control of the polarization direction of the HE dual modes. Furthermore, each protrusion 221 can indirectly support the dielectric resonator 10 via the abutting components 30, thereby improving the stability of the position and state of the dielectric resonator 10, and enhancing the structural and performance stability, reliability, and consistency of the multimode resonator.

[0074] In some embodiments, the dielectric resonator 10, the abutment member 30, and the protrusions 221 can be interconnected and fixed so that the dielectric resonator 10 can be stably positioned and in a stable state within the resonator housing 20 and between the protrusions 221, thereby fixing the dielectric resonator 10 substantially relative to the resonator housing 20. In other embodiments, the dielectric resonator 10 can be connected and fixed to the substrate 21 of the resonator housing 20 to achieve fixation relative to the resonator housing 20.

[0075] Please see Figure 2 , Figure 6 In some embodiments of this application, the dielectric resonator 10 is suspended between two substrates 21.

[0076] It should be noted that this embodiment is applicable to both embodiments where "the outer peripheral wall of the dielectric resonator 10 directly abuts against each protrusion 221" and embodiments where "the dielectric resonator 10 and each protrusion 221 are indirectly abutted against each other through the abutting component 30".

[0077] It should also be noted that, along the axial direction of the dielectric resonator 10, the dielectric resonator 10 is spaced apart from both one substrate 21 and the other substrate 21, and is suspended between the two substrates 21. The distance between the dielectric resonator 10 and one of the substrates 21 may be the same as or different from the distance between the dielectric resonator 10 and the other substrate 21.

[0078] By adopting the above scheme, and by suspending the dielectric resonator 10 between the two substrates 21, the dielectric resonator 10 can be ungrounded and connected to the two substrates 21 without loading metal along the axial direction of the dielectric resonator 10, thus preventing the introduction of the TM mode resonance mode into the vicinity of the passband. Based on this, the multimode resonator can be made to operate in a single-cavity uncoupled TM mode resonance mode, and can be made to primarily support the required HE mode resonance mode. This reduces the mode complexity of the multimode resonator, reduces mode interference, makes the frequency response of the multimode resonator pure and controllable, and improves the filtering performance and frequency selectivity of the multimode resonator.

[0079] In the absence of other designs that introduce the TE-mode resonant mode to the vicinity of the passband, the multimode resonator in this embodiment is an HE dual-mode resonator.

[0080] Please see Figure 7 In some embodiments of this application, the dielectric resonator 10 directly abuts against the two substrates 21 so that the multimode resonator has at least three resonance modes: HE mode and TM mode.

[0081] It should be noted that this embodiment is mainly applicable to embodiments related to "the outer peripheral wall of the dielectric resonator 10 directly abutting against each protrusion 221".

[0082] It should also be noted that, along the axial direction of the dielectric resonator 10, the dielectric resonator 10 directly abuts against both one of the substrates 21 and the other substrate 21, that is, the dielectric resonator 10 directly abuts between the two substrates 21, which means that the dielectric resonator 10 is grounded and connected between the two substrates 21.

[0083] By adopting the above scheme, based on the direct contact between the outer peripheral wall of the dielectric resonator 10 and each protrusion 221, and by making the dielectric resonator 10 directly contact the two substrates 21, the dielectric resonator 10 can be grounded to the two substrates 21. Metal can be loaded along the axial direction of the dielectric resonator 10, and the loading of metal along the axial direction of the dielectric resonator 10 can be basically the same as the loading of metal in a specific direction of the protrusions 221. Based on this, the TM mode resonance mode can be introduced to the vicinity of the passband, which can make the resonant frequency of the TM mode close to the resonant frequency of the HE mode, close to the same frequency band, and within the passband range. This facilitates the realization of at least three high-Q resonant modes of single-cavity coupled HE mode and TM mode in multimode resonators, increases the mode diversity of multimode resonators, enables complex filtering characteristics, achieves low-loss and high-performance filtering effects, improves the filtering performance, frequency selectivity, and versatility of multimode resonators, and meets a wide range of application needs.

[0084] Furthermore, this multimode resonator can achieve at least a third-order filtering effect, which is equivalent to the filtering effect of at least three single-mode resonators, or the filtering effect of at least three microwave resonators. This can improve the performance and space utilization of the multimode resonator, and facilitate its miniaturization and integration.

[0085] In the absence of other designs that introduce the TE mode resonant mode to the vicinity of the passband, the multimode resonator in this embodiment is an HE-TM three-mode resonator.

[0086] Please see Figure 8 In some embodiments of this application, the dielectric resonator 10 is indirectly connected to each substrate 21 through the abutment member 30, so that the multimode resonator has at least three resonance modes: HE mode and TM mode.

[0087] It should be noted that this embodiment is mainly applicable to the embodiment where "the dielectric resonator 10 and each protrusion 221 are indirectly connected through the abutting component 30".

[0088] It should also be noted that, along the axial direction of the dielectric resonator 10, the dielectric resonator 10 indirectly abuts against both one substrate 21 via abutting member 30 and the other substrate 21 via abutting member 30. That is, the dielectric resonator 10 is indirectly abutted against each substrate 21 via abutting member 30, meaning that the dielectric resonator 10 is connected between two substrates 21. The abutting member 30 between the dielectric resonator 10 and the substrate 21 and the abutting member 30 between the dielectric resonator 10 and the protrusion 221 are abutting members 30 with the same structure, shape, and size.

[0089] By adopting the above scheme, based on the indirect abutment between the dielectric resonator 10 and each protrusion 221 via the abutment member 30, and by also indirectly abutting between the dielectric resonator 10 and each substrate 21 via the abutment member 30, the dielectric resonator 10 can be connected to the two substrates 21. Metal can be loaded along the axial direction of the dielectric resonator 10, and the loading of metal along the axial direction of the dielectric resonator 10 can be basically the same as the loading of metal in a specific direction of the protrusion 221. Based on this, the TM mode resonance mode can be introduced to the vicinity of the passband, which can make the resonant frequency of the TM mode close to the resonant frequency of the HE mode, close to the same frequency band, and within the passband range. This facilitates the realization of at least three high Q-value resonance modes of single-cavity coupled HE mode and TM mode in multimode resonators, increases the mode diversity of multimode resonators, enables complex filtering characteristics, achieves low-loss and high-performance filtering effects, improves the filtering performance, frequency selectivity, and versatility of multimode resonators, and meets a wide range of application needs.

[0090] Furthermore, this multimode resonator can achieve at least a third-order filtering effect, which is equivalent to the filtering effect of at least three single-mode resonators, or the filtering effect of at least three microwave resonators. This can improve the performance and space utilization of the multimode resonator, and facilitate its miniaturization and integration.

[0091] In the absence of other designs that introduce the TE mode resonant mode to the vicinity of the passband, the multimode resonator in this embodiment is an HE-TM three-mode resonator.

[0092] Please see Figure 9 In some embodiments of this application, the dielectric resonator 10 and each protrusion 221 are spaced by the same distance, and the distance d is less than or equal to 3 mm.

[0093] It should be noted that the dielectric resonator 10 and each protrusion 221 are spaced apart, and the spacing d between the dielectric resonator 10 and each protrusion 221 is the same, which is greater than 0 and less than or equal to 3 mm. For example, the dielectric resonator 10 and each protrusion 221 are spaced apart by 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc.

[0094] By adopting the above scheme, and by ensuring that the dielectric resonator 10 and each protrusion 221 are spaced at the same and small distance, the loading of metal on each protrusion 221 in a specific direction is basically the same without significant differences. This makes it easier for each protrusion 221 to work with the dielectric resonator 10 to stably excite a pair of usable, orthogonal HE dual modes. This also makes it easier for the resonant frequencies of the HE dual modes to be within the passband and close to the same frequency band, and facilitates relatively precise control of the polarization direction of the HE dual modes.

[0095] Based on the configuration of this embodiment, the dielectric resonator 10 is difficult to connect and fix to the housing body 22, but is mainly connected and fixed to the substrate 21 and fixed relative to the resonator housing 20. In this case, the dielectric resonator 10 is connected to the substrate 21, but because there is a difference between "the loading of metal along the axial direction of the dielectric resonator 10" and "the loading of metal in a specific direction of the protrusion 221", the TM mode resonance mode may not necessarily be introduced to the vicinity of the passband. If the TM mode resonance mode is introduced to the vicinity of the passband, the resonant frequency of the TM mode is close to the resonant frequency of the HE mode, and is close to the same frequency band and within the passband range, then the multimode resonator can realize at least three high Q-value resonance modes of single-cavity coupling HE mode and TM mode. If the TM mode resonance mode is not introduced to the vicinity of the passband, the multimode resonator does not couple the TM mode resonance mode in the single cavity, and the multimode resonator mainly supports the HE mode resonance mode.

[0096] Please see Figure 2 , Figure 3 , Figure 4In some embodiments of this application, four protrusions 221 are provided.

[0097] It should be noted that there are four protrusions 221. The four protrusions 221 are arranged in a circle with equal angles around the central axis L of the dielectric resonator 10, so that the four protrusions 221 are in pairs. The two protrusions 221 in one group are arranged opposite each other along the first radial direction x of the dielectric resonator 10, and the two protrusions 221 in the other group are arranged opposite each other along the second radial direction y of the dielectric resonator 10. The first radial direction x is perpendicular to the second radial direction y.

[0098] By adopting the above scheme, based on the premise that "at least three protrusions 221 are provided, and each protrusion 221 is arranged in a circular shape with equal angles around the central axis L of the dielectric resonator 10", by providing four protrusions 221, the four protrusions 221 arranged in a circular shape with equal angles can be grouped in pairs, and the two protrusions 221 in one group can be arranged opposite each other along the first radial direction x of the dielectric resonator 10, and the two protrusions 221 in the other group can be arranged opposite each other along the second radial direction y that is perpendicular to the first radial direction x. Based on this, one polarization direction of the HE mode can be precisely controlled along the first radial direction x, and the other polarization direction of the HE mode can be precisely controlled along the second radial direction y. This improves the stability and controllability of the HE dual-mode resonant mode, and allows for precise guidance and control of the two electric field polarization directions of the HE mode. It also facilitates the subsequent design of tuning and coupling structures based on the precisely determined and unbiased electric field polarization directions of the HE mode, optimizes the performance of the multimode resonator, facilitates the coupling and simulation design of the multimode resonator, and improves the design flexibility, consistency, and stability of the multimode resonator.

[0099] Of course, in other embodiments, the protrusions 221 may be two, three, five or more.

[0100] Please see Figure 1 Some embodiments of this application provide a filter, including the multimode resonator provided in the embodiments of this application.

[0101] It should be noted that the filter may include one or more resonators, and at least one resonator is a multimode resonator provided in the embodiments of this application. When there are multiple resonators, the multiple resonators can be arranged and designed to form adjacent coupling and cross coupling as needed.

[0102] By adopting the above scheme, the filter can improve its performance and power capacity, reduce insertion loss, and reduce size by using the multimode resonator provided in the embodiments of this application.

[0103] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A multimode resonator, characterized in that, The multimode resonator has at least two resonance modes: HE mode and H mode. The multimode resonator includes: The dielectric resonator has a rotationally symmetric structure. A resonator housing, wherein the dielectric resonator is disposed within the resonator housing, the resonator housing includes two substrates disposed opposite to each other along the axial direction of the dielectric resonator, and a shell body connected between the two substrates, wherein the inner wall of the shell body is provided with a protrusion; The protrusion is provided in two parts, and the two protrusions are arranged on the same circumference around the central axis of the dielectric resonator, and the central angle between the two protrusions is 90°; or, the protrusion is provided in at least three parts, and each protrusion is arranged in a circle with equal angles around the central axis of the dielectric resonator.

2. The multimode resonator as described in claim 1, characterized in that, The outer peripheral wall of the dielectric resonator directly abuts against each of the protrusions.

3. The multimode resonator as described in claim 2, characterized in that, The protrusion has an abutting surface on the side facing the dielectric resonator, and the abutting surface fits and abuts against the outer peripheral wall of the dielectric resonator.

4. The multimode resonator as described in claim 2, characterized in that, The dielectric resonator is welded and fixed to each of the protrusions.

5. The multimode resonator as described in claim 1, characterized in that, The dielectric resonator is indirectly abutted to each of the protrusions via abutting components.

6. The multimode resonator as described in any one of claims 2-5, characterized in that, The dielectric resonator is suspended between the two substrates.

7. The multimode resonator as described in any one of claims 2-4, characterized in that, The dielectric resonator is in direct contact with the two substrates, so that the multimode resonator has at least three resonance modes: HE mode and TM mode.

8. The multimode resonator as described in claim 5, characterized in that, The dielectric resonator is indirectly connected to each of the substrates through the abutting component, so that the multimode resonator has at least three resonance modes: HE mode and TM mode.

9. The multimode resonator as described in claim 1, characterized in that, The dielectric resonator and each of the protrusions are spaced at the same distance, and the distance between them is less than or equal to 3 mm.

10. The multimode resonator as described in claim 1, characterized in that, The protrusion has four parts.

11. A filter, characterized in that, Includes the multimode resonator as described in any one of claims 1-10.

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