Dielectric cavity resonator and filter

Abstract

The invention relates to the field of communication, and provides a dielectric cavity resonator and a filter. The dielectric cavity resonator comprises a resonator shell and a dielectric resonance piece, and the resonator shell is provided with a first plate and a second plate which are oppositely arranged; the dielectric resonance part is arranged in the resonator shell, the dielectric resonance part comprises a dielectric main body connected to the first plate and dielectric cylinders arranged on the side, facing the second plate, of the dielectric main body in a protruding mode, the dielectric cylinders and the second plate are arranged in a spaced mode, the dielectric main body is used for determining the resonant frequency of a TE mode, and the dielectric cylinders are used for determining the resonant frequency of a TM mode; therefore, the resonant frequency of the TE mode and the resonant frequency of the TM mode are in the same frequency band. The dielectric cavity resonator can be used for coupling at least two resonant modes of a TE mode and a TM mode in a single cavity, the dielectric cavity resonator is convenient to construct a coupling relationship with resonators such as a metal coaxial resonator and the like, the coupling effect is relatively good, and the usability, the applicability and the practicability of the dielectric cavity resonator are relatively good.

Description

Technical Field

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

[0002] A dual-mode resonator is a resonator capable of simultaneously generating two stable oscillation signals at different frequencies. A dual-mode resonator supports two resonance modes within its passband. Currently, the most common dual-mode resonator is the HE (Hybrid Electromagnetic Mode) resonator. However, the HE resonator utilizes two orthogonal HE modes. The coupling between the HE mode and modes such as the TEM (Transverse Electric and Magnetic Field) mode is quite difficult, making it challenging to establish coupling between the HE dual-mode resonator and other resonators such as metal coaxial resonators, resulting in poor coupling performance and limited usability and applicability. Summary of the Invention

[0003] This application provides a dielectric cavity resonator and filter, aiming to solve the problem that the coupling construction of existing dual-mode resonators with resonators such as metal coaxial resonators is difficult and the coupling effect is poor, resulting in poor usability and applicability of existing dual-mode 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 dielectric cavity resonator is provided, comprising:

[0006] The resonator housing has a first plate and a second plate disposed opposite to each other;

[0007] A dielectric resonator is disposed within the resonator housing. The dielectric resonator includes a dielectric body connected to the first plate and a dielectric post protruding from the dielectric body towards the second plate. The dielectric post is spaced apart from the second plate. The dielectric body is used to determine the resonant frequency of the TE mode, and the dielectric post is used to determine the resonant frequency of the TM mode, so that the resonant frequency of the TE mode and the resonant frequency of the TM mode are in the same frequency band.

[0008] In some embodiments, the central axis of the medium body passes through the medium column along the axial direction of the medium body.

[0009] In some embodiments, the medium body has a recess.

[0010] In some embodiments, the recess includes a first recess formed on the end face of the medium body, the first recess being disposed between the outer peripheral surface of the medium body and the central axis of the medium body;

[0011] And / or, the recess includes a second recess formed at the periphery of the medium body, the second recess communicating with the outer peripheral surface of the medium body and at least one end face of the medium body;

[0012] And / or, the recess includes a third recess formed on the outer peripheral surface of the medium body, the third recess being disposed between the two end faces of the medium body.

[0013] In some embodiments, the first plate has a grounding component, the recess includes an annular recess that is continuously or intermittently arranged in a ring shape, the central axis of the annular recess coincides with the central axis of the dielectric body, the bottom of the annular recess is closed, and the grounding component closes the opening of the annular recess so that the resonant frequency of the HE dual mode is in the same frequency band as the resonant frequency of the TE mode and the resonant frequency of the TM mode.

[0014] In some embodiments, the dielectric resonator includes a dielectric rod disposed on the side of the dielectric body facing the first plate, and the dielectric body is connected to the first plate through the dielectric rod.

[0015] In some embodiments, the medium body has a recess located on the outer periphery of the medium rod.

[0016] In some embodiments, the resonator housing includes a base protruding from the first plate, the base having a positioning groove, and the dielectric rod being inserted into the positioning groove.

[0017] In some embodiments, the medium rod is welded to the base.

[0018] In some embodiments, the dielectric resonator is a rotationally symmetric structure.

[0019] In some embodiments, the dielectric cavity resonator includes a metal disk and an insulating element. The metal disk and the dielectric resonator are disposed opposite to each other along the axial direction of the dielectric resonator. The metal disk is connected to the second plate through the insulating element. The distance between the metal disk and the dielectric resonator is adjustable to adjust the resonant frequency of the TE mode.

[0020] In some embodiments, the metal disk is circular, the outer peripheral wall of the insulating member is provided with external threads, the insulating member is connected to the center of the metal disk, and is threadedly connected to the second plate.

[0021] Secondly, a filter is provided, including the dielectric cavity resonator provided in the embodiments of this application.

[0022] The beneficial effects of the dielectric cavity resonator provided in this application are as follows:

[0023] The dielectric cavity resonator provided in this application embodiment can influence and determine the resonant frequency of the TE mode through the dielectric body of the dielectric resonator. The resonant frequency of the TM mode can be influenced and determined through dielectric pillars protruding from the dielectric body towards the second plate. Based on this, the resonant frequency of the TE mode can be adjusted by changing the radial dimension and thickness of the dielectric body; the resonant frequency of the TM mode can be adjusted by changing the number of dielectric pillars, their position, their radial dimension, and the distance between the dielectric pillars and the second plate. This ensures that the resonant frequencies of the TE and TM modes are close, placing them within their passbands and close to the same frequency band. Therefore, the dielectric cavity resonator can couple at least two orthogonal high-Q (Quality Factor) resonant modes, the TE and TM modes, within a single cavity. It can facilitate the establishment of coupling relationships with resonators such as metal coaxial resonators based on the TE and TM modes, resulting in better coupling effects. This improves the usability, applicability, and practicality of the dielectric cavity resonator. Attached Figure Description

[0024] 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.

[0025] Figure 1 Three-dimensional schematic diagram of a dielectric cavity resonator provided for some embodiments of this application;

[0026] Figure 2 for Figure 1 A cross-sectional view of a dielectric cavity resonator is provided.

[0027] Figure 3 for Figure 2 A three-dimensional sectional view of the provided dielectric resonator;

[0028] Figure 4 Electric field distribution diagrams of the TE mode of a dielectric cavity resonator provided in some embodiments of this application;

[0029] Figure 5 Electric field distribution diagrams of the TM mode of a dielectric cavity resonator provided in some embodiments of this application;

[0030] Figure 6 for Figure 1 The provided frequency simulation diagram of the dielectric cavity resonator shows that the red line represents the TE mode and the orange line represents the TM mode. The resonant frequency of the TE mode and the resonant frequency of the TM mode are close to 2.6 GHz (gigahertz).

[0031] Figure 7 for Figure 1 The provided simulation diagram of the Q value of the dielectric cavity resonator shows that the red line represents the TE mode and the orange line represents the TM mode. The Q value of the TM mode is approximately 8700 and the Q value of the TE mode is approximately 14000.

[0032] Figure 8 A cross-sectional view of a dielectric cavity resonator provided for other embodiments of this application, wherein the recess includes a second recess;

[0033] Figure 9 A cross-sectional view of a dielectric cavity resonator provided for other embodiments of this application, wherein the recess includes a third recess;

[0034] Figure 10 This is a cross-sectional view of a dielectric cavity resonator provided in some other embodiments of this application, wherein the dielectric cavity resonator includes a metal disk and an insulating element.

[0035] The following are the labeling elements in the figure:

[0036] 10-Resonator housing, 11-First plate, 12-Second plate, 13-Resonant cavity, 14-Base, 141-Positioning groove; 20-Dielectric resonator, 21-Dielectric body, 211-Recess, 2111-First recess, 2112-Second recess, 2113-Third recess, 22-Dielectric pillar, 23-Dielectric rod; 30-Metal disk, 40-Insulator, 50-Adjusting screw, y-First direction, L-Central axis of dielectric body. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] In this application, "central axis" refers to a line that passes through the geometric center of the corresponding structure.

[0042] 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.

[0043] A single-mode resonator supports only one resonant mode within its passband (e.g., TE (Transverse Electric) mode, TM (Transverse Magnetic) mode, TEM (Transverse Electric and Magnetic Field) mode, etc.). For example, a metallic coaxial resonator is a single-mode resonator, supporting only the TEM mode within its passband.

[0044] A dual-mode resonator is a resonator capable of simultaneously generating two stable oscillation signals at different frequencies. A dual-mode resonator supports two resonance modes within its passband. Currently, the most common dual-mode resonator is the HE (Hybrid Electromagnetic Mode) resonator. However, the HE resonator utilizes two orthogonal modes, HE (Hybrid Electromagnetic Mode). Coupling the HE mode with modes such as TEM (Transient Electromagnetic Mode), TM (Transient Electromagnetic Mode), and TE (Transient Electromagnetic Mode) is difficult. This makes it challenging to establish coupling between the HE dual-mode resonator and other resonators such as metal coaxial resonators, resulting in poor coupling performance and limited usability and applicability of the HE dual-mode resonator.

[0045] Therefore, this application provides a dielectric cavity resonator that can couple at least two orthogonal resonance modes, namely TE mode and TM mode, in a single cavity. This dielectric cavity resonator is easy to couple with resonators such as metal coaxial resonators and the coupling effect is better. This dielectric cavity resonator has better usability, applicability and practicality.

[0046] The specific implementation of this application will be described in detail below with reference to specific embodiments:

[0047] Please see Figure 1 , Figure 2 , Figure 3 Some embodiments of this application provide a dielectric cavity resonator, including a resonator housing 10 and a dielectric resonator 20. The resonator housing 10 has a first plate 11 and a second plate 12 disposed opposite to each other. The dielectric resonator 20 is disposed inside the resonator housing 10. The dielectric resonator 20 includes a dielectric body 21 connected to the first plate 11 and a dielectric post 22 protruding from the dielectric body 21 toward the second plate 12. The dielectric post 22 is spaced apart from the second plate 12. The dielectric body 21 is used to determine the resonant frequency of the TE mode, and the dielectric post 22 is used to determine the resonant frequency of the TM mode, so that the resonant frequency of the TE mode and the resonant frequency of the TM mode are in the same frequency band.

[0048] It should be noted that the dielectric cavity resonator provided in this application can couple at least two orthogonal resonance modes, namely TE mode and TM mode, in a single cavity. That is, while coupling TE mode and TM mode, the dielectric cavity resonator can also couple other modes besides TE mode and TM mode, or it can choose not to couple other modes besides TE mode and TM mode. When the dielectric cavity resonator couples only TE mode and TM mode in a single cavity, the dielectric cavity resonator is a TE-TM dual-mode resonator; when the dielectric cavity resonator couples TE mode and TM mode in a single cavity, and also couples other resonance modes (such as HE mode), the dielectric cavity resonator is a multi-mode resonator (such as a three-mode resonator or a four-mode resonator).

[0049] It should also be noted that the resonator housing 10 has a resonant cavity 13 (which can be an air cavity) inside. The resonant cavity 13 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 resonant cavity 13 can accommodate the dielectric resonator 20. Optionally, the dielectric resonator 20 can be centrally arranged within the resonant cavity 13. The resonator housing 10 can provide shielding to prevent signal leakage.

[0050] The resonator housing 10 has a first plate 11 on one side and a second plate 12 on the opposite side. In practical applications, the resonator housing 10 can be positioned with the second plate 12 facing upwards, or with the second plate 12 facing left, right, forward, or backward. Furthermore, the shape, size, and material of the resonator housing 10 can be flexibly configured as needed.

[0051] It should also be noted that the dielectric resonator 20 is a resonant rod made of dielectric material. The dielectric resonator 20 can be a ceramic dielectric resonator 20 or a dielectric resonator 20 made of other materials.

[0052] The dielectric resonator 20 includes a dielectric body 21 and a dielectric pillar 22. The dielectric body 21 is connected to the first plate 11 on the side facing the first plate 11. The dielectric body 21 can be directly connected and fixed to the first plate 11 by means of, but not limited to, welding, bonding, riveting, pressing, plugging, screw fastening, threaded connection, snap-fit, etc., or it can be indirectly connected and fixed to the first plate 11 by other structures connected to it (such as dielectric rod 23, base 14, alumina base, other ceramic base, coupling rib, metal connector, etc.). The spacing direction between the first plate 11 and the second plate 12 is the first direction y. When the dielectric body 21 is connected to the first plate 11, the central axis L of the dielectric body 21 is parallel to or approximately parallel to the first direction y, that is, the axial direction of the dielectric body 21 (that is, the axial direction of the dielectric resonator 20) is parallel to or approximately parallel to the first direction y.

[0053] The dielectric body 21 is the part of the dielectric resonator 20 used to influence and determine the resonant frequency of the TE mode. For example... Figure 4As shown, since the electric field of the TE mode is distributed in a horizontal (i.e., parallel to the orientation of the first plate 11) ring shape and the magnetic field is distributed in a vertical (i.e., perpendicular to the orientation of the first plate 11) ring shape, the electric field of the TE mode will be concentrated in the center of the resonant cavity 13 and will form a ring shape. Therefore, the resonant frequency of the TE mode can be influenced and determined by the dielectric body 21, which is basically located at the center of the resonant cavity 13. Specifically, the resonant frequency of the TE mode can be adjusted by adjusting the radial dimension and thickness (i.e., the dimension of the dielectric body 21 along its axial direction) of the dielectric body 21. Among them, the larger the radial dimension of the dielectric body 21, the lower the resonant frequency of the TE mode; the smaller the radial dimension of the dielectric body 21, the higher the resonant frequency of the TE mode. The larger the thickness of the dielectric body 21, the lower the resonant frequency of the TE mode; the smaller the thickness of the dielectric body 21, the higher the resonant frequency of the TE mode. The medium body 21 may be in the form of, but is not limited to, a disc, column, block, etc. The cross-sectional shape of the medium body 21 perpendicular to its axis may be in the form of, but is not limited to, a circle, rectangle, square, polygon, petal, cross, etc. The cross-sectional shape of the medium body 21 parallel to its axis may be in the form of, but is not limited to, a circle, rectangle, square, polygon, petal, cross, etc.

[0054] The dielectric pillar 22 protrudes from the dielectric body 21 on the side facing the second plate 12. The central axis of the dielectric pillar 22 can coincide with or be parallel to the central axis L of the dielectric body 21. There can be one or more dielectric pillars 22. The dielectric body 21 and the dielectric pillar 22 can be integrally connected or separately connected. The end face of the dielectric pillar 22 away from the dielectric body 21 is spaced apart from the second plate 12. The dielectric pillar 22 is the part of the dielectric resonator 20 used to influence and determine the resonant frequency of the TM mode. Figure 5 As shown, since the magnetic field of the TM mode is distributed in a horizontal ring and the electric field is distributed in a vertical ring, the electric field of the TM mode will be concentrated between the dielectric resonator 20 and the second plate 12. Therefore, the resonant frequency of the TM mode can be influenced and determined by the dielectric pillar 22 protruding from the dielectric body 21 towards the second plate 12. The cross-sectional shape of the dielectric pillar 22 perpendicular to its axial direction can be, but is not limited to, circular, rectangular, polygonal, petal-shaped, cross-shaped, etc.

[0055] Specifically, the resonant frequency of the TM mode can be adjusted by changing the number of dielectric pillars 22, their position, their radial dimension, and the distance between the dielectric pillars 22 and the second plate 12. A larger number of dielectric pillars 22 results in a lower resonant frequency, while fewer pillars result in a higher frequency. The closer the dielectric pillars 22 are to the central axis L of the dielectric body 21, the lower the resonant frequency; the farther away they are from the central axis L, the higher the frequency. A larger radial dimension of the dielectric pillars 22 results in a lower frequency, while a smaller dimension results in a higher frequency. A smaller distance between the dielectric pillars 22 and the second plate 12 (i.e., closer the dielectric pillars 22 are to the second plate 12) results in a lower frequency, while a larger distance (i.e., farther away the dielectric pillars 22 are from the second plate 12) results in a higher frequency.

[0056] Based on this, the resonant frequency of the TE mode can be adjusted by adjusting the radial dimensions and thickness of the dielectric body 21; the resonant frequency of the TM mode can be adjusted by adjusting the number of dielectric pillars 22, the position of the dielectric pillars 22, the radial dimensions of the dielectric pillars 22, and the distance between the dielectric pillars 22 and the second plate 12; so that the resonant frequency of the TE mode is close to the resonant frequency of the TM mode, close to the same frequency band, and within the passband range.

[0057] In some embodiments, the radial dimension of the dielectric pillar 22 is smaller than the radial dimension of the dielectric body 21. Of course, in other embodiments, when the resonant frequency of the TE mode and the resonant frequency of the TM mode are close to the same frequency band, the radial dimension of the dielectric pillar 22 and the radial dimension of the dielectric body 21 can be set to be equal.

[0058] In summary, the dielectric cavity resonator provided in this application embodiment can influence and determine the resonant frequency of the TE mode through the dielectric body 21 of the dielectric resonator 20. The resonant frequency of the TM mode can be influenced and determined through the dielectric pillars 22 protruding from the dielectric body 21 towards the second plate 12. Based on this, the resonant frequency of the TE mode can be adjusted by adjusting the radial dimension and thickness of the dielectric body 21; the resonant frequency of the TM mode can be adjusted by adjusting the number, position, radial dimension, and distance between the dielectric pillars 22 and the second plate 12. This ensures that the resonant frequencies of the TE and TM modes are close, placing them within the passband and close to the same frequency band. Therefore, the dielectric cavity resonator can couple at least two orthogonal high-Q resonant modes, the TE and TM modes, within a single cavity. It can facilitate the establishment of coupling relationships with resonators such as metal coaxial resonators based on the TE and TM modes, resulting in better coupling effects. This improves the usability, applicability, and practicality of the dielectric cavity resonator.

[0059] Furthermore, since this dielectric cavity resonator can achieve at least a second-order filtering effect, it is equivalent to the filtering effect of at least two single-mode resonators connected in series, that is, equivalent to the filtering effect of at least two microwave resonators, thereby improving the performance and space utilization of the dielectric cavity resonator. In addition, the dielectric cavity resonator has a small size, which is beneficial for miniaturization and weight reduction.

[0060] like Figure 6 , Figure 7 As shown, in a specific application example, the dielectric cavity resonator has two orthogonal resonance modes: TE mode and TM mode, coupled in a single cavity; that is, the dielectric cavity resonator is a TE-TM dual-mode resonator. In this TE-TM dual-mode resonator, the resonant frequency of the TE mode is close to the resonant frequency of the TM mode at 2.6 GHz, the Q value of the TM mode is approximately 8700, and the Q value of the TE mode is approximately 14000.

[0061] Please see Figure 2 , Figure 3 In some embodiments of this application, the central axis L of the medium body 21 passes through the medium column 22 along the axial direction of the medium body 21. That is, the medium column 22 is located at the central axis L of the medium body 21, and the medium column 22 coincides with the central axis L of the medium body 21.

[0062] It should be noted that, in this embodiment, the central axis of the medium column 22 and the central axis L of the medium body 21 can be arranged to coincide or to be arranged parallel to each other. When the central axis of the medium column 22 and the central axis L of the medium body 21 are arranged to be spaced apart, it is necessary to ensure that the central axis L of the medium body 21 can pass through the medium column 22, that is, the central axis L of the medium body 21 should be located between the outer circumferential surface of the medium column 22 and the central axis of the medium column 22.

[0063] like Figure 5 As shown, since the electric field of the TM mode is distributed in a vertical ring shape, it is concentrated between the dielectric resonator 20 and the second plate 12, and concentrated at the central axis L of the dielectric body 21. Therefore, by making the central axis L of the dielectric body 21 pass through the dielectric pillar 22 along the axial direction of the dielectric body 21, and aligning the dielectric pillar 22 with the central axis L of the dielectric body 21, the dielectric pillar 22 can be located at the concentration point of the electric field of the TM mode. Based on this, the dielectric pillar 22 has a greater influence on the resonant frequency of the TM mode, achieving a more significant control effect on the resonant frequency of the TM mode. This facilitates convenient and quick control of the resonant frequency of the TM mode, increases the controllable range of the TM mode resonant frequency, and makes it easier to control the resonant frequency of the TM mode to the desired range. This improves the convenience and accuracy of adjusting the resonant frequency of the TM mode, facilitates the precise design of "the resonant frequency of the TE mode and the resonant frequency of the TM mode being within the passband and close to the same frequency band," and improves the performance and design flexibility of the dielectric cavity resonator.

[0064] In some embodiments, the central axis of the dielectric pillar 22 coincides with the central axis L of the dielectric body 21. In this case, the dielectric pillar 22 has the greatest impact on the resonant frequency of the TM mode, and its effect on regulating the resonant frequency of the TM mode is the most significant.

[0065] Of course, in other embodiments, the central axis L of the medium body 21 does not pass through the medium column 22 along the axial direction of the medium body 21. That is, the medium column 22 does not coincide with the central axis L of the medium body 21, and the outer peripheral surface of the medium column 22 is spaced apart from the central axis L of the medium body 21.

[0066] Please see Figure 2 , Figure 8 , Figure 9 In some embodiments of this application, the medium body 21 is provided with a recess 211.

[0067] It should be noted that recesses 211 can be provided in any region of the dielectric body 21 as needed, so that the portion of the dielectric body 21 in the region where the recesses 211 are provided is hollowed out. The main function of the recesses 211 is to increase the resonant frequency of the TE mode. The recesses 211 can be provided on the end face of the dielectric body 21 facing the first plate 11, the end face of the dielectric body 21 facing the second plate 12, or the outer peripheral surface of the dielectric body 21.

[0068] The recess 211 may include at least one of an opening and a groove. The opening may be a blind hole or a through hole. The opening may be a circular hole, a rectangular hole, an oblong hole, an irregularly shaped hole, etc. The groove may be a straight groove, a curved groove, an arc groove, an annular groove, etc. The annular groove may be cylindrical, conical, mesa, stepped, or other shapes.

[0069] Based on the recess 211, the dielectric body 21 can be locally thinned, especially the thickness of the portion of the dielectric body 21 corresponding to the recess 211 along its axial and radial directions can be reduced or even reduced to zero. Based on this, by precisely designing the shape (e.g., groove, hole, etc.), form (e.g., annular, circular, rectangular, elliptical, etc.), size (e.g., depth, width, length, etc.), number, and position of the recess 211, the resonant frequency of the TE mode can be finely improved, thereby making the resonant frequency of the TE mode close to the resonant frequency of the TM mode, close to the same frequency band, and within the passband.

[0070] By adopting the above scheme, the resonant frequency of the TE mode can be increased by creating a recess 211 in the dielectric body 21, thereby reducing the size of the corresponding portions of the dielectric body 21 along its axial and radial directions. Based on this, the TE mode resonant frequency can be finely adjusted (increased) by precisely designing the shape, size, number, and position of the recess 211. This facilitates the design where the resonant frequencies of the TE and TM modes are within the passband and close to the same frequency band, improving the design and fabrication convenience of the dielectric resonator 20 and the dielectric cavity resonator, and ultimately enhancing the performance of the dielectric cavity resonator. Furthermore, the design of the recess 211 also reduces the weight of the dielectric body 21 and the dielectric resonator 20, thus reducing the weight of the dielectric cavity resonator while optimizing performance, which is beneficial for the lightweight design of the dielectric cavity resonator.

[0071] Furthermore, when the dielectric cavity resonator couples only to the TE and TM modes in a single cavity, i.e., when the dielectric cavity resonator is a TE-TM dual-mode resonator, the recess 211 not only increases the TE mode resonant frequency but also pushes the HE mode resonant frequency further away. Based on this, the resonant frequency of the HE mode, which was originally outside the passband, can be further pushed away to reduce interference from the HE mode. This allows the TE-TM dual-mode resonator to couple only to the TE and TM modes, without coupling the HE mode, thus optimizing the performance of the dielectric cavity resonator when it is a TE-TM dual-mode resonator.

[0072] Of course, in other embodiments, the recess 211 may be omitted from the dielectric body 21, and the resonant frequency of the TE mode may be adjusted directly based on the overall radial dimensions and thickness.

[0073] Please see Figure 2 , Figure 8 , Figure 9 In some embodiments of this application, the recess 211 includes a first recess 2111 formed on the end face of the medium body 21, the first recess 2111 being disposed between the outer peripheral surface of the medium body 21 and the central axis L of the medium body 21.

[0074] It should be noted that the medium body 21 has two end faces, which are opposite to each other along the axial direction of the medium body 21. The outer peripheral surface of the medium body 21 is the peripheral surface connected to the two end faces of the medium body 21.

[0075] It should also be noted that the first recess 2111 can be in the form of an opening or a groove. The first recess 2111 can be formed on any end face of the medium body 21 and is located between the outer peripheral surface of the medium body 21 and the central axis L of the medium body 21. Specifically, between the outer peripheral surface of the medium body 21 and the central axis L of the medium body 21, the first recess 2111 can be exactly centered, or it can be arranged off-center from the outer peripheral surface of the medium body 21 or off-center from the central axis L of the medium body 21.

[0076] Specifically, the more openings and grooves included in the first recess 2111, the higher the resonant frequency of the TE mode; the deeper the various parts of the first recess 2111, the higher the resonant frequency of the TE mode; the wider the various parts of the first recess 2111, the higher the resonant frequency of the TE mode; the longer the extension path of the first recess 2111, the higher the resonant frequency of the TE mode; the closer the position of the first recess 2111 is to the outer peripheral surface of the dielectric body 21, the higher the resonant frequency of the TE mode; and so on. Based on this, it is convenient to accurately adjust the number, size, shape, and position of the first recess 2111 to precisely control the resonant frequency of the TE mode, thereby facilitating the precise design of "the resonant frequency of the TE mode and the resonant frequency of the TM mode being within the passband and close to the same frequency band," which is conducive to improving the performance of the dielectric cavity resonator.

[0077] By adopting the above scheme, by opening a first recess 2111 on the end face of the dielectric body 21 and placing the first recess 2111 between the outer peripheral surface of the dielectric body 21 and the central axis L of the dielectric body 21, the depth direction of the first recess 2111 corresponds to the axial direction of the dielectric body 21. This facilitates the direct thinning of a specific area of ​​the dielectric body 21 along the axial direction of the dielectric body 21, thereby conveniently, controllably, and precisely improving the resonant frequency of the TE mode.

[0078] Furthermore, since the electric field of the TE mode is concentrated around the periphery of the dielectric body 21, the recess 211 has the greatest impact on the resonant frequency of the TE mode when it is located on the outer periphery of the dielectric body 21; and the impact on the resonant frequency of the TE mode is minimal when the recess 211 is located on the central axis of the dielectric body 21. By placing the first recess 2111 between the outer peripheral surface of the dielectric body 21 and the central axis L of the dielectric body 21, the first recess 2111 can avoid the outer peripheral surface of the dielectric body 21, which can reduce the situation where the resonant frequency of the TE mode increases abruptly due to the excessive influence of the first recess 2111 on the resonant frequency of the TE mode; at the same time, the first recess 2111 also avoids the central axis L of the dielectric body 21, which can reduce the situation where the resonant frequency of the TE mode cannot increase significantly due to the insufficient influence of the first recess 2111 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, and the resonant frequency of the TE mode can be controlled more precisely. At the same time, the electric field of the TM mode is more concentrated at the central axis L of the dielectric body 21. The first recess 2111 avoids the central axis L of the dielectric body 21, which can also reduce the influence of the first recess 2111 on the resonant frequency of the TM mode. This makes it easier to accurately design that "the resonant frequency of the TE mode and the resonant frequency of the TM mode are within the passband and close to the same frequency band", which is conducive to improving the performance of the dielectric cavity resonator.

[0079] Furthermore, the first recess 2111 is formed on the end face of the medium body 21, which facilitates mold design and allows the medium body 21 and its first recess 2111 to be integrally formed by the mold. In particular, it can improve the demolding convenience of the mold after the medium body 21 is formed (demolding can be performed along the axial direction of the medium body 21), improve the molding convenience and molding accuracy of the medium body 21, and reduce the mold cost and the processing cost of the medium body 21.

[0080] Please see Figure 2 , Figure 8 In some embodiments of this application, the recess 211 includes a second recess 2112 formed on the periphery of the medium body 21, the second recess 2112 being connected to the outer peripheral surface of the medium body 21 and at least one end face of the medium body 21.

[0081] It should be noted that the second recess 2112 can be in the form of an opening or a groove. The second recess 2112 is formed on the periphery of the medium body 21, and the second recess 2112 is connected to both the outer peripheral surface of the medium body 21 and at least one end face of the medium body 21. The depth direction of the second recess 2112 (e.g., the depth direction of the opening, the depth direction of the groove) corresponds to (i.e., is substantially parallel to) both the radial and axial directions of the medium body 21. Specifically, the second recess 2112 can be connected to one side of the axial direction of the medium body 21 to the corresponding end face of the medium body 21, or the second recess 2112 can be connected to two opposite end faces of the medium body 21 along opposite sides of the axial direction of the medium body 21.

[0082] Specifically, the more openings and grooves included in the second recess 2112, the higher the resonant frequency of the TE mode; the deeper the second recess 2112 is along the axial direction of the dielectric body 21, the higher the resonant frequency of the TE mode; the deeper the second recess 2112 is along the radial direction of the dielectric body 21, the higher the resonant frequency of the TE mode; the longer the extension path of the second recess 2112, the higher the resonant frequency of the TE mode; and so on. Based on this, the number, size, shape, and position of the second recess 2112 can be precisely adjusted to accurately control the resonant frequency of the TE mode, thereby facilitating the precise design of "the resonant frequency of the TE mode and the resonant frequency of the TM mode being within the passband and close to the same frequency band," which is conducive to improving the performance of the dielectric cavity resonator.

[0083] By adopting the above scheme, by opening a second recess 2112 on the periphery of the dielectric body 21 and connecting the second recess 2112 to the outer peripheral surface of the dielectric body 21 and at least one end face of the dielectric body 21, the depth direction of the second recess 2112 corresponds to the axial and radial directions of the dielectric body 21. This facilitates the thinning of a specific area of ​​the dielectric body 21 along the axial and radial directions of the dielectric body 21, thereby conveniently, controllably, and precisely improving the resonant frequency of the TE mode.

[0084] Furthermore, since the electric field of the TE mode is concentrated around the periphery of the dielectric body 21, and the second recess 2112 is located at the periphery of the dielectric body 21 and connects to the outer peripheral surface of the dielectric body 21, the second recess 2112 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 recess 2112, making it convenient and quick to adjust the resonant frequency of the TE mode, increasing the range of TE mode resonant frequency that can be increased, and making it easier to increase the resonant frequency of the TE mode to the required range. At the same time, since the electric field of the TM mode is concentrated at the central axis L of the dielectric body 21, based on the arrangement of this embodiment, the influence of the second recess 2112 located at the periphery of the dielectric body 21 on the resonant frequency of the TM mode can also be greatly reduced, enabling convenient and controllable increase of the resonant frequency of the TE mode while keeping the resonant frequency of the TM mode basically stable. This improves the ease and accuracy of adjusting the resonant frequency of the TE mode, facilitates the precise design of "the resonant frequency of the TE mode and the resonant frequency of the TM mode being within the passband and close to the same frequency band", and facilitates the improvement of the performance and design flexibility of the dielectric cavity resonator.

[0085] Furthermore, the second recess 2112 is connected to at least one end face of the medium body 21, which facilitates mold design and allows the medium body 21 and its second recess 2112 to be integrally formed by the mold. In particular, it can improve the demolding convenience of the mold after the medium body 21 is formed (demolding can be performed along the axial direction of the medium body 21), improve the molding convenience and molding accuracy of the medium body 21, and reduce the mold cost and the processing cost of the medium body 21.

[0086] Please see Figure 2 , Figure 9 In some embodiments of this application, the recess 211 includes a third recess 2113 formed on the outer peripheral surface of the medium body 21, and the third recess 2113 is disposed between the two end faces of the medium body 21.

[0087] It should be noted that the third recess 2113 can be in the form of an opening or a groove. The third recess 2113 is formed on the outer peripheral surface of the medium body 21 and is located between two opposite end faces of the medium body 21 along the axial direction. That is, along the axial direction of the medium body 21, the third recess 2113 is not connected to either end face of the medium body 21, and both opposite ends of the third recess 2113 along the axial direction of the medium body 21 are closed.

[0088] Specifically, the more openings and grooves included in the third recess 2113, the higher the resonant frequency of the TE mode; the deeper the third recess 2113, the higher the resonant frequency of the TE mode; the wider the third recess 2113, the higher the resonant frequency of the TE mode; the longer the extension path of the third recess 2113, the higher the resonant frequency of the TE mode; and so on. Based on this, the number, size, shape, and position of the third recess 2113 can be precisely adjusted to accurately control the resonant frequency of the TE mode, thereby facilitating the precise design of "the resonant frequency of the TE mode and the resonant frequency of the TM mode being within the passband and close to the same frequency band," which is conducive to improving the performance of the dielectric cavity resonator.

[0089] By adopting the above scheme, by opening a third recess 2113 on the outer peripheral surface of the dielectric body 21 and placing the third recess 2113 between the two end faces of the dielectric body 21, the depth direction of the third recess 2113 corresponds to the radial direction of the dielectric body 21. This facilitates the thinning of a specific area of ​​the dielectric body 21 along the radial direction of the dielectric body 21, thereby conveniently, controllably, and precisely improving the resonant frequency of the TE mode.

[0090] Furthermore, since the electric field of the TE mode is concentrated around the periphery of the dielectric body 21, when the third recess 2113 is located on the outer peripheral surface of the dielectric body 21, the third recess 2113 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 third recess 2113, making it convenient and quick to adjust the resonant frequency of the TE mode, increasing the range of TE mode resonant frequency that can be increased, and making it easier to increase the resonant frequency of the TE mode to the required range. At the same time, since the electric field of the TM mode is concentrated at the central axis L of the dielectric body 21, based on the arrangement of this embodiment, the influence of the third recess 2113 on the resonant frequency of the TM mode can also be greatly reduced, and the resonant frequency of the TE mode can be conveniently and controllably increased while keeping the resonant frequency of the TM mode basically stable. This improves the ease and accuracy of adjusting the resonant frequency of the TE mode, facilitates the precise design of "the resonant frequency of the TE mode and the resonant frequency of the TM mode being within the passband and close to the same frequency band", and facilitates the improvement of the performance and design flexibility of the dielectric cavity resonator.

[0091] In this application, the aforementioned embodiments concerning the "first recess 2111," "second recess 2112," and "third recess 2113" can be implemented individually, in pairs, or all in combination. For example, in Figure 2 In the illustrated embodiment, the medium body 21 may only have a first recess 2111; for example, in Figure 8In the illustrated embodiment, the medium body 21 may simultaneously have a first recess 2111 and a second recess 2112; for example, in Figure 9 In the embodiment shown, the medium body 21 may be provided with a first recess 2111 and a third recess 2113 at the same time.

[0092] Please see Figure 8 , Figure 9 In some embodiments of this application, the embodiments of the second recess 2112 and / or the embodiments of the third recess 2113 are implemented in combination with the embodiments of the first recess 2111. That is, the recess 211 includes the first recess 2111 and the second recess 2112; or, the recess 211 includes the first recess 2111 and the third recess 2113; or, the recess 211 includes the first recess 2111, the second recess 2112, and the third recess 2113.

[0093] Since the electric field of the TE mode is concentrated around the periphery of the dielectric body 21, the second recess 2112 is located at the periphery of the dielectric body 21 and connects to the outer peripheral surface of the dielectric body 21, and the third recess 2113 is located on the outer peripheral surface of the dielectric body 21. Therefore, the second recess 2112 and the third recess 2113 have a greater impact on the resonant frequency of the TE mode, and their influence on the resonant frequency of the TE mode is more significant. On the other hand, the first recess 2111 avoids the outer peripheral surface of the dielectric body 21. Therefore, compared with the second recess 2112 and the third recess 2113, the first recess 2111 has a smaller impact on the resonant frequency of the TE mode. Furthermore, the first recess 2111 avoids the central axis L of the dielectric body 21, and the first recess 2111 will not lose its effect of increasing the frequency due to its small impact on the resonant frequency of the TE mode.

[0094] By adopting the above scheme, the resonant frequency of the TE mode can be significantly increased by the second recess 2112 and / or the third recess 2113, while the resonant frequency of the TE mode is increased slightly by the first recess 2111. Based on this, while facilitating convenient and quick adjustment of the resonant frequency of the TE mode, increasing the range of TE mode resonant frequency increases, and making it easier to increase the resonant frequency of the TE mode to the desired range, more precise control of the resonant frequency of the TE mode can be achieved. That is, the resonant frequency of the TE mode can be significantly increased to near the desired range by the second recess 2112 and / or the third recess 2113, and then precisely and slightly increased to the desired range by the first recess 2111. In this way, the resonant frequency of the TE mode can be more precisely controlled. While significantly increasing the resonant frequency of the TE mode, the increase in the resonant frequency of the TE mode can be more accurate, precise and stable. The resonant frequency of the TE mode can be more precisely controlled, which facilitates the precise design of "the resonant frequency of the TE mode and the resonant frequency of the TM mode being within the passband and close to the same frequency band", which is conducive to improving the performance and design flexibility of the dielectric cavity resonator.

[0095] In some embodiments of this application, the first plate 11 has a grounding component, the recess 211 includes an annular recess, the annular recess is continuously or intermittently surrounding the ring, the central axis of the annular recess coincides with the central axis L of the dielectric body 21, the bottom of the annular recess is closed, and the grounding component closes the opening of the annular recess so that the resonant frequency of the HE dual mode is in the same frequency band as the resonant frequency of the TE mode and the resonant frequency of the TM mode.

[0096] The annular recess can be continuous or discontinuous in its circumference, with its central axis (i.e., the surrounding axis) coinciding with the central axis L of the medium body 21. In some embodiments, the annular recess can be a complete and continuous annular structure, such as an annular groove. In other embodiments, the annular recess can also be a discontinuous annular structure formed by multiple parts, such as multiple arc-shaped grooves surrounding an axis and forming an annular recess, or multiple blind holes surrounding an axis and forming an annular recess, or multiple straight grooves surrounding an axis and forming an annular recess. The bottom of the annular recess is closed, meaning the annular recess does not include through-hole structures. The annular recess can be located on any end face, periphery, or outer circumferential surface of the medium body 21.

[0097] In the case where the annular recess is a complete and continuous annular groove, the notch of the annular recess is the groove opening of the annular groove. In the case where the annular recess is a discontinuous structure formed by multiple parts and is annular in shape as a whole, the notch of the annular recess includes the openings of each part. For example, the notch of the annular recess includes the groove openings of each arc-shaped groove, or the notch of each blind hole, or the notch of the annular recess includes the groove openings of each straight groove, and so on.

[0098] It should be noted that the recess 211 may consist only of an annular recess; the recess 211 may also include both an annular recess and other structures besides the annular recess, such as a through hole. When the recess 211 includes both an annular recess and other structures besides the annular recess, it is understood that the other structures besides the annular recess may not be annular, and may connect to the opposite ends of the medium body 21, and their central axis may not coincide with the central axis L of the medium body 21.

[0099] The grounding component can be the first plate 11 itself, meaning the first plate 11 itself can serve as the grounding component, with the inner side of the first plate 11 enclosing the notch of the annular recess. Alternatively, the grounding component can be a metal grounding ring, a metal grounding post, or a base 14 protruding from the first plate 11, with the inner side of the metal grounding ring, the cylindrical surface of the metal grounding post, or the end face of the base 14 enclosing the notch of the annular recess. The grounding component enclosing the notch of the annular recess allows the grounding component and the annular recess to form at least one closed air cavity. Within the air cavity, the electric field path of the HE dual-mode will be vertically distributed and have no substantial transmission effect. Most of the electric field path of the HE dual-mode needs to bend around the air cavity and has substantial transmission effect. Based on this, the electric field path of the HE dual-mode can be extended, the resonant frequency of the HE dual-mode can be lowered, and the resonant frequency of the HE dual-mode can be made closer to the resonant frequency of the TE mode and the resonant frequency of the TM mode. This can also make the resonant frequencies of the HE dual-mode, the TE mode, and the TM mode all within the passband and close to the same frequency band. That is, the dielectric cavity resonator in this embodiment is a four-mode resonator.

[0100] The recess 211 includes an annular recess, which has the relevant effects of the recess 211. The annular recess allows for local thinning of the dielectric body 21, especially reducing the thickness of the portion of the dielectric body 21 corresponding to the annular recess along its axial direction, and also reducing the size of the portion of the dielectric body 21 corresponding to the annular recess along its radial direction. Based on this, the resonant frequency of the TE mode can be increased. Furthermore, by precisely designing the specific structure (e.g., annular groove, multiple blind holes, multiple arc grooves, multiple straight grooves, etc.), dimensions (e.g., depth, width, length, etc.), and position of the annular recess, the resonant frequency of the TE mode can be finely increased, thereby making the resonant frequency of the TE mode close to the resonant frequency of the TM mode, close to the same frequency band, and within the passband. The more blind holes and grooves included in the annular recess, the higher the resonant frequency of the TE mode; the deeper the various parts of the annular recess, the higher the resonant frequency of the TE mode; the wider the various parts of the annular recess, the higher the resonant frequency of the TE mode; the longer the extension path of the annular recess, the higher the resonant frequency of the TE mode; the closer the position of the annular recess is to the outer peripheral surface of the dielectric body 21, the higher the resonant frequency of the TE mode; and so on.

[0101] By adopting the above scheme, the notch of the annular recess can be sealed by the grounding component, so that the grounding component and the annular recess can enclose at least one closed air cavity. This air cavity causes the electric field path of the HE dual-mode to be vertically distributed, and forces most, or even all, of the electric field path of the HE dual-mode to bend around the air cavity. This lengthens the electric field path of the HE dual-mode, lowers its resonant frequency, and brings it closer to the resonant frequencies of the TE and TM modes. Furthermore, it ensures that the resonant frequencies of the HE dual-mode, TE mode, and TM mode are all within the passband and close to the same frequency band. Therefore, the dielectric cavity resonator can realize four resonant modes: single-cavity coupled TE mode, TM mode, and HE dual-mode. That is, the dielectric cavity resonator in this embodiment is a four-mode resonator. The dielectric cavity resonator in this embodiment can achieve a fourth-order filtering effect, equivalent to the filtering effect of four series-connected single-mode resonators, thereby optimizing and improving the performance and space utilization of the dielectric cavity resonator.

[0102] Furthermore, the annular recess can also locally thin the dielectric body 21, especially reducing the thickness of the portion of the dielectric body 21 corresponding to the annular recess along its axial and radial directions, thereby increasing the resonant frequency of the TE mode, making the resonant frequency of the TE mode closer to the resonant frequency of the TM mode, and making the resonant frequency of the TE mode and the resonant frequency of the TM mode within the passband and close to the same frequency band.

[0103] Furthermore, compared to existing multimode resonators, this dielectric cavity resonator achieves four modes without significantly increasing the size of the dielectric body 21, which is beneficial for miniaturizing the overall size of the dielectric cavity resonator and allows the dielectric cavity resonator to meet both the requirements of high performance and miniaturization.

[0104] Furthermore, since the dielectric cavity resonator has four resonance modes—TE mode, TM mode, and HE dual mode—it is easy to establish a coupling relationship with resonators that have any of the TE, TM, HE, and TEM modes, and the coupling effect is better. This makes the dielectric cavity resonator more usable, applicable, and practical.

[0105] Furthermore, in practical applications, this dielectric cavity resonator can shorten the electric field path of the HE dual-mode by leaving all the annular recesses unclosed in the grounding component. This allows the HE dual-mode electric field path to pass directly through the annular recesses, thus enabling all the annular recesses to both "increase the resonant frequency of the TE mode" and "push the resonant frequency of the HE dual mode further away," extending the HE dual-mode resonant frequency beyond the passband. Based on this, the dielectric cavity resonator can easily, quickly, and flexibly switch between a four-mode resonator and a TE-TM dual-mode resonator. Therefore, the dielectric cavity resonator offers superior flexibility and ease of use.

[0106] Please see Figure 2 , Figure 3 In some embodiments of this application, the dielectric resonator 20 includes a dielectric rod 23 disposed on the side of the dielectric body 21 facing the first plate 11, and the dielectric body 21 is connected to the first plate 11 through the dielectric rod 23.

[0107] It should be noted that a medium rod 23 may be provided on the side of the medium body 21 facing the first plate 11. The medium body 21 and the medium rod 23 may be connected integrally or separately.

[0108] The medium body 21 can be connected to the first plate 11 via the medium rod 23. The medium rod 23 can be directly connected and fixed to the first plate 11 by means of, but not limited to, welding, bonding, riveting, pressing, screw fastening, threaded connection, snap-fit, etc., or it can be indirectly connected and fixed to the first plate 11 by other structures connected to it (such as base 14, alumina base, other ceramic base, coupling rib, metal connector, etc.). The medium rod 23 can be a round rod, a polygonal rod, an irregularly shaped rod, or other shapes, and the medium rod 23 can be a solid rod or a hollow rod.

[0109] By adopting the above scheme, the dielectric resonator 20 can be equipped with a dielectric rod 23, so that the dielectric body 21 can be connected and fixed to the first plate 11 via the dielectric rod 23. Based on this, the assembly convenience between the dielectric body 21 and the first plate 11 can be improved, and there is no need to set an additional alumina base or other ceramic base between the dielectric body 21 and the first plate 11, thereby reducing the number of parts and improving the assembly convenience and assembly efficiency of the dielectric cavity resonator.

[0110] In particular, since both the dielectric rod 23 and the dielectric body 21 are parts of the dielectric resonator 20, it is easy to integrally mold the dielectric rod 23 and the dielectric body 21, which simplifies the assembly process between them. Furthermore, it is possible to use the same material (e.g., microwave dielectric ceramic) for the dielectric rod 23 and the dielectric body 21, which optimizes dielectric properties and thus improves the overall specifications and performance of the dielectric cavity resonator.

[0111] Of course, in other embodiments, the dielectric resonator 20 may not have the dielectric rod 23.

[0112] Please see Figure 2 , Figure 3 In some embodiments of this application, the medium body 21 is provided with a recess 211, which is located on the outer periphery of the medium rod 23.

[0113] By adopting the above solution, when the dielectric resonator 20 is provided with a dielectric rod 23 and the dielectric body 21 is provided with a recess 211, by placing the recess 211 on the outer periphery of the dielectric rod 23, the recess 211 can be positioned to avoid the dielectric rod 23. Based on this, the relative layout between the dielectric rod 23 and the recess 211 can be optimized, which facilitates mold design and allows for the integral molding of the dielectric rod 23, the dielectric body 21, and the recess 211 via the mold. This improves the demolding convenience of the mold after the dielectric resonator 20 is formed, enhances the molding convenience and molding accuracy of the dielectric resonator 20, and reduces mold costs and the processing costs of the dielectric resonator 20.

[0114] In particular, when the dielectric resonator 20 is provided with a dielectric rod 23, the dielectric body 21 is provided with a recess 211, and the recess 211 is connected to any end face of the dielectric body 21, the dielectric resonator 20 can be demolded along its axial direction, which can optimize and improve the demolding convenience of the mold after the dielectric resonator 20 is formed.

[0115] Please see Figure 2 In some embodiments of this application, the resonator housing 10 includes a base 14 protruding from the first plate 11, the base 14 being provided with a positioning groove 141, and the dielectric rod 23 being inserted into the positioning groove 141.

[0116] It should be noted that the base 14 protrudes from the side of the first plate 11 facing the second plate 12. The base 14 can be integrally formed with the first plate 11 or it can be separately connected to the first plate 11. The shape and size of the base 14 can be set as needed. The base 14 can be used to position and install the dielectric resonator 20, and to stabilize the installation position and installation state of the dielectric resonator 20.

[0117] A positioning groove 141 is provided on the side of the base 14 facing the second plate 12. The shape, size and depth of the positioning groove 141 can be set as needed. In some embodiments, the depth of the positioning groove 141 is equal to the thickness of the base 14, so that the combined shape of the base 14 and the positioning groove 141 is annular.

[0118] The dielectric rod 23 of the dielectric resonator 20 can be positioned and limited in the positioning groove 141 so as to be conveniently and quickly installed stably on the base 14, thereby realizing the connection to the first plate 11.

[0119] It should also be noted that, since the magnetic field of the TM mode is distributed in a horizontal ring and the electric field is distributed in a vertical ring, the electric field of the TM mode will be more concentrated between the dielectric resonator 20 and the second plate 12. Therefore, the base 14 can also be used to raise the resonant position of the TM mode.

[0120] By adopting the above scheme, the dielectric rod 23 of the dielectric resonator 20 can be positioned and limited in the positioning groove 141, thus facilitating and quickly stabilizing the installation of the dielectric resonator 20. This improves the assembly convenience and efficiency of the dielectric resonator 20, and enhances the assembly efficiency of the dielectric cavity resonator. Furthermore, the base 14 and the positioning groove 141 on it provide a precise installation position for the dielectric resonator 20, ensuring accurate positioning within the resonator housing 10. This reduces performance fluctuations caused by inaccurate installation of the dielectric resonator 20, improving the stability and consistency of the dielectric cavity resonator's performance. Additionally, the base 14 can elevate the resonant position of the TM mode, optimizing its resonant characteristics. This helps ensure that the resonant frequency of the TM mode and the resonant frequency of the TE mode are within the passband and close to the same frequency band, further optimizing the performance of the dielectric cavity resonator.

[0121] Furthermore, based on the assembly method of "the dielectric rod 23 is inserted into the positioning groove 141", there is no need to use screws to fix the dielectric resonator 20. The dielectric resonator 20 does not need to be provided with a central hole through its axis for screws to pass through. This can basically avoid the setting of the central hole from having a significant impact on the resonant frequency of the TM mode. It can reduce the situation where the resonant frequency of the TM mode and the resonant frequency of the TE mode are difficult to control due to the significant increase of the resonant frequency of the TM mode caused by the setting of the central hole.

[0122] Of course, in other embodiments, the base platform 14 can be omitted, and the medium rod 23 can be directly connected to the inner side of the first plate 11. For example, the positioning groove 141 can be formed on the inner side of the first plate 11, and the medium rod 23 can be inserted into the positioning groove 141.

[0123] Please see Figure 2 In some embodiments of this application, the medium rod 23 is welded to the base 14.

[0124] By adopting the above solution, when the dielectric rod 23 is inserted into the positioning groove 141, the dielectric rod 23 can also be completely fixed to the base 14 by welding. Based on this, the connection stability between the dielectric resonator 20 and the resonator housing 10 can be improved, the installation position and installation state of the dielectric resonator 20 can be stabilized, and the dielectric resonator 20 can function stably and reliably.

[0125] Furthermore, based on the assembly method of "the dielectric rod 23 is inserted into the positioning groove 141 and the dielectric rod 23 is welded to the base 14", there is no need to use screws to fix the dielectric resonator 20. The dielectric resonator 20 does not need to be provided with a central hole through its axis for screws to pass through. This can basically avoid the setting of the central hole from having a significant impact on the resonant frequency of the TM mode. It can reduce the situation where the resonant frequency of the TM mode and the resonant frequency of the TE mode are difficult to control due to the significant increase of the resonant frequency of the TM mode caused by the setting of the central hole.

[0126] Of course, in other embodiments, when the medium rod 23 is inserted into the positioning groove 141, the medium rod 23 can be completely fixed to the base 14 by means of bonding or the like.

[0127] Please see Figure 2 In some embodiments of this application, the dielectric resonator 20 is a rotationally symmetric structure.

[0128] It should be noted that the dielectric resonator 20 has a rotationally symmetric structure around its central axis. Specifically, the dielectric body 21 has a rotationally symmetric structure around the central axis of the dielectric resonator 20. There may be one dielectric pillar 22, which has a rotationally symmetric structure around the central axis of the dielectric resonator 20; or, there may be multiple dielectric pillars 22, which have a rotationally symmetric structure around the central axis of the dielectric resonator 20.

[0129] In the case where the dielectric resonator 20 includes a dielectric rod 23, the dielectric rod 23 has a rotationally symmetric structure around the central axis of the dielectric resonator 20.

[0130] When the dielectric body 21 has a recess 211, the recess 211 has a rotationally symmetric structure about the central axis of the dielectric resonator 20. For example, when the recess 211 includes an annular groove, the annular groove has a rotationally symmetric structure about the central axis of the dielectric resonator 20, that is, the annular groove is a circular groove, and the central axis of the annular groove coincides with the central axis of the dielectric resonator 20.

[0131] By adopting the above scheme and making the dielectric resonator 20 a rotationally symmetric structure, the structure and electromagnetic field distribution of the dielectric resonator 20 are essentially the same in different directions around the central axis of the dielectric resonator 20, and thus it is not directional. Based on this, the dielectric resonator 20 can be assembled directly and quickly into the resonator housing 10 without considering assembly angle and limiting issues, thereby improving the assembly convenience and efficiency of the dielectric resonator 20 and increasing the assembly efficiency of the dielectric cavity resonator. Furthermore, it reduces performance fluctuations caused by inaccurate assembly angles of the dielectric resonator 20, improving the stability and consistency of the dielectric cavity resonator's performance.

[0132] This embodiment is particularly suitable for use in conjunction with the embodiment in which "the resonator housing 10 includes a base 14 protruding from the first plate 11, the base 14 is provided with a positioning groove 141, and the dielectric rod 23 is inserted into the positioning groove 141", so that the dielectric resonator 20 can be directly inserted into the positioning groove 141 of the base 14 without considering the assembly angle, and can be installed and fixed easily and quickly.

[0133] Of course, in other embodiments, the dielectric resonator 20 may be a non-rotationally symmetric structure.

[0134] Please see Figure 10 In some embodiments of this application, the dielectric cavity resonator includes a metal disk 30 and an insulating member 40. The metal disk 30 and the dielectric resonator 20 are disposed opposite to each other along the axial direction of the dielectric resonator 20. The metal disk 30 is connected to the second plate 12 through the insulating member 40. The distance between the metal disk 30 and the dielectric resonator 20 is adjustable to adjust the resonant frequency of the TE mode.

[0135] 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 resonator 20, the metal disk 30 is arranged opposite to or directly opposite the dielectric resonator 20. The metal disk 30 is connected to the second plate 12 through an insulating member 40, which insulates the metal disk 30 from the second plate 12, prevents the metal disk 30 from being grounded, and suspends the metal disk 30 between the second plate 12 and the dielectric resonator 20, allowing the metal disk 30 to compress the magnetic field of the TE mode. The insulating member 40 can be, but is not limited to, a plastic part, a wooden part, a ceramic part, a quartz part, a glass part, etc.

[0136] In some embodiments, the metal disk 30 may have a through hole, and the insulating member 40 may be inserted through the through hole 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 40 may be connected to the metal disk 30 by means of bonding, welding, snap-fitting, etc.

[0137] The insulating element 40 passes through the second plate 12 and can move axially relative to the second plate 12 to move the metal disk 30 towards or away from the dielectric resonator 20, thereby adjusting the distance between the metal disk 30 and the dielectric resonator 20. As the distance between the metal disk 30 and the dielectric resonator 20 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.

[0138] By adopting the above scheme, relative to the second plate 12, the insulating member 40 can be moved along its axial direction, thereby causing the ungrounded metal disk 30 to move closer to or further away from the dielectric resonator 20, thus conveniently and quickly adjusting the distance between the metal disk 30 and the dielectric resonator 20. Based on this, the compression effect of the metal disk 30 on the magnetic field of the TE mode can be adjusted by adjusting the distance between the metal disk 30 and the dielectric resonator 20, thereby achieving independent and fine adjustment of the resonant frequency of the TE mode, making tuning convenient, quick, and accurate. That is, in this embodiment, the resonant frequency of the TE mode can be independently tuned via the ungrounded metal disk 30, with minimal impact on the resonant frequency of the TM mode. Specifically, the smaller the distance between the metal disk 30 and the dielectric resonator 20, the more the metal disk 30 compresses the magnetic field of the TE mode, and the higher the resonant frequency of the TE mode; conversely, the larger the distance between the metal disk 30 and the dielectric resonator 20, the weaker the compression effect of the metal disk 30 on the magnetic field of the TE mode, and the lower the resonant frequency of the TE mode.

[0139] 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.

[0140] Please see Figure 10 In some embodiments of this application, the metal disk 30 is circular, the outer peripheral wall of the insulating member 40 is provided with external threads, the insulating member 40 is connected to the center of the metal disk 30 and is threaded to the second plate 12.

[0141] It should be noted that the metal disk 30 is circular in shape, meaning that the metal disk 30 has a rotationally symmetrical structure around its central axis.

[0142] For example, the insulating member 40 may be an insulating screw or an insulating rod, such as a plastic screw or plastic rod. The insulating member 40 is connected to the center of the metal disk 30, such that the insulating member 40 and the metal disk 30 together have a rotationally symmetrical structure about the central axis of the metal disk 30. The insulating member 40 is threaded to the second plate 12, so that the insulating member 40 can be moved axially relative to the second plate 12 by screwing in or out the insulating member 40. The insulating member 40 may be directly threaded to the second threaded hole of the second plate 12; or, the second plate 12 may have a first mounting member (not shown in the figure) embedded therein, and the insulating member 40 may be threaded to the threaded hole of the first mounting member.

[0143] By adopting the above scheme, making the metal disk 30 circular and connecting the insulating member 40 to the center of the metal disk 30, the insulating member 40 and the metal disk 30 can be made rotationally symmetrical about the central axis of the metal disk 30. This ensures that the structure of the metal disk 30 and its compression effect on the TE mode magnetic field are basically the same and non-directional in different directions around the central axis of the metal disk 30. Furthermore, by threading the insulating member 40 to the second plate 12, the axial movement of the insulating member 40 can be easily, quickly, accurately, and controllably adjusted by screwing it in or out. This allows for convenient and quick movement of the metal disk 30 towards or away from the dielectric resonator 20, and convenient, quick, stable, accurate, and controllable adjustment of the distance between the metal disk 30 and the dielectric resonator 20. Moreover, the circular shape offers ease of machining and high machining accuracy. Therefore, the tuning stability, controllability, and accuracy of the TE mode's resonant frequency can be effectively improved.

[0144] Of course, in other embodiments, the metal disk 30 may not be a disk.

[0145] In other embodiments, the insulating member 40 may pass through the second plate 12, meaning the insulating member 40 and the second plate 12 are not connected by threads. The insulating member 40 can move directly axially relative to the second plate 12 to move the metal disk 30 closer to or further away from the dielectric resonator 20, thereby adjusting the distance between the metal disk 30 and the dielectric resonator 20. In this case, the second plate 12 is provided with a mounting hole, and the insulating member 40 can be snapped into the mounting hole. For example, the insulating member 40 is deformable along its radial direction. The insulating member 40 achieves fixation and release from the mounting hole of the second plate 12 through its own radial deformation. During each operation of releasing from the mounting hole and fixing to the mounting hole, the insulating member 40 can be controlled to move directly axially relative to the second plate 12. Alternatively, the wall of the mounting hole is provided with a slot, and the outer peripheral wall of the insulating member 40 is provided with multiple retaining beads spaced apart along its axial direction. By driving the different retaining beads of the insulating member 40 to be fixed in the slot, the insulating member 40 can move directly axially relative to the second plate 12.

[0146] Please see Figure 2 , Figure 10 In some embodiments of this application, the dielectric cavity resonator includes an adjusting screw 50, which is threadedly connected to the resonator housing 10 and is used to adjust the resonant frequency of the TM mode.

[0147] It should be noted that the number of adjusting screws 50 can be one or more. The adjusting screw 50 can be threadedly connected to any plate of the resonator housing 10 (e.g., the second plate 12, the first plate 11, or other side plates). The adjusting screw 50 can be directly threaded into a threaded hole in the corresponding plate; alternatively, a second mounting component (not shown in the figure) can be embedded in the corresponding plate, and the adjusting screw 50 can be threaded into a threaded hole in the second mounting component. The adjusting screw 50 is grounded based on its connection to the resonator housing 10.

[0148] The installation position of the adjusting screw 50 is not limited. Along the axial direction of the dielectric resonator 20, the adjusting screw 50 and the dielectric resonator 20 can be aligned or misaligned.

[0149] By adopting the above scheme, the length of the portion of the adjusting screw 50 extending into the resonator housing 10 can be conveniently and quickly adjusted by screwing it in or out. Based on this, the electric field of the TM mode can be affected by adjusting the length of the portion of the adjusting screw 50 extending into the resonator housing 10, thereby achieving independent and precise adjustment of the resonant frequency of the TM mode. Tuning is convenient, quick, and accurate. In other words, this embodiment allows independent tuning of the resonant frequency of the TM mode via the grounded adjusting screw 50, with minimal impact on the resonant frequency of the TE mode. Specifically, the longer the portion of the adjusting screw 50 extending into the resonator housing 10, the lower the resonant frequency of the TM mode; conversely, the shorter the portion of the adjusting screw 50 extending into the resonator housing 10, the higher the resonant frequency of the TM mode.

[0150] In some embodiments, the adjusting screw 50 is threadedly connected to the second plate 12. This configuration optimizes the tuning effect of the adjusting screw 50 on the resonant frequency of the TM mode and expands the tuning range of the TM mode's resonant frequency. In particular, the tuning effect of the adjusting screw 50 on the resonant frequency of the TM mode is optimal when the adjusting screw 50 is threadedly connected to the second plate 12 and the adjusting screw 50 and the dielectric resonator 20 are aligned along the axial direction of the dielectric resonator 20.

[0151] Please see Figure 1 Some embodiments of this application provide a filter, including the dielectric cavity resonator provided in the embodiments of this application. The filter may have one or more resonators, and the multiple resonators can be arranged in a specific layout, with coupling relationships established between adjacent resonators as needed. At least one of the resonators employs the dielectric cavity resonator provided in the embodiments of this application.

[0152] By adopting the above scheme, the filter can be designed using the dielectric cavity resonator provided in the embodiments of this application, which facilitates simulation design and coupling design, optimizes the coupling effect between resonators, and improves the performance of the filter.

[0153] 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 dielectric cavity resonator, characterized in that, include: The resonator housing has a first plate and a second plate disposed opposite to each other; A dielectric resonator is disposed within the resonator housing. The dielectric resonator includes a dielectric body connected to the first plate and a dielectric post protruding from the dielectric body towards the second plate. The dielectric post is spaced apart from the second plate. The dielectric body is used to determine the resonant frequency of the TE mode, and the dielectric post is used to determine the resonant frequency of the TM mode, so that the resonant frequency of the TE mode and the resonant frequency of the TM mode are in the same frequency band.

2. The dielectric cavity resonator as described in claim 1, characterized in that, Along the axial direction of the medium body, the central axis of the medium body passes through the medium column.

3. The dielectric cavity resonator as described in claim 1, characterized in that, The medium body has a recess.

4. The dielectric cavity resonator as described in claim 3, characterized in that, The recess includes a first recess formed on the end face of the medium body, the first recess being located between the outer peripheral surface of the medium body and the central axis of the medium body; And / or, the recess includes a second recess formed at the periphery of the medium body, the second recess communicating with the outer peripheral surface of the medium body and at least one end face of the medium body; And / or, the recess includes a third recess formed on the outer peripheral surface of the medium body, the third recess being disposed between the two end faces of the medium body.

5. The dielectric cavity resonator as described in claim 3, characterized in that, The first plate has a grounding component, the recess includes an annular recess, the annular recess is continuously or intermittently arranged in a ring, the central axis of the annular recess coincides with the central axis of the dielectric body, the bottom of the annular recess is closed, and the grounding component closes the opening of the annular recess so that the resonant frequency of the HE dual mode is in the same frequency band as the resonant frequency of the TE mode and the resonant frequency of the TM mode.

6. The dielectric cavity resonator as described in any one of claims 1-5, characterized in that, The dielectric resonator includes a dielectric rod disposed on the side of the dielectric body facing the first plate, and the dielectric body is connected to the first plate through the dielectric rod.

7. The dielectric cavity resonator as described in claim 6, characterized in that, The medium body has a recess, which is located on the outer periphery of the medium rod.

8. The dielectric cavity resonator as described in claim 6, characterized in that, The resonator housing includes a base protruding from the first plate, the base having a positioning groove, and the dielectric rod being inserted into the positioning groove.

9. The dielectric cavity resonator as described in claim 8, characterized in that, The medium rod is welded to the base platform.

10. The dielectric cavity resonator according to any one of claims 1-5, characterized in that, The dielectric resonator has a rotationally symmetric structure.

11. The dielectric cavity resonator according to any one of claims 1-5, characterized in that, The dielectric cavity resonator includes a metal disk and an insulating component. The metal disk and the dielectric resonator are arranged opposite to each other along the axial direction of the dielectric resonator. The metal disk is connected to the second plate through the insulating component. The distance between the metal disk and the dielectric resonator is adjustable to adjust the resonant frequency of the TE mode.

12. The dielectric cavity resonator as described in claim 11, characterized in that, The metal disk is circular in shape, and the outer peripheral wall of the insulating member is provided with external threads. The insulating member is connected to the center of the metal disk and is threaded to the second plate.

13. A filter, characterized in that, Including the dielectric cavity resonator as described in any one of claims 1-12.

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