Multimode dielectric resonator, filter and base station

Abstract

The application discloses a multi-mode dielectric resonator, a filter and a base station, and relates to the field of communication equipment. The multi-mode dielectric resonator comprises a dielectric body made of non-metal material and a metallization layer; the dielectric body has a first end face, a second end face and an outer peripheral surface; the first end face and the second end face are respectively provided with a first groove for enhancing the Q value of the multi-mode dielectric resonator; the outer peripheral surface is provided with a plurality of second grooves for adjusting the resonant frequency, and the plurality of second grooves are arranged towards different directions; and the metallization layer is arranged on the outer peripheral surface and the local groove wall or the whole groove wall of each second groove. The application can solve the problems of large volume and weight of the resonator.

Description

Technical Field

[0001] This application belongs to the technical field of communication equipment, specifically relating to a multimode dielectric resonator, filter, and base station. Background Technology

[0002] Multimode dielectric resonators, due to their high dielectric constant and ability to operate in multiple modes simultaneously in a single cavity, have a more integrated size than conventional metal coaxial resonators and are widely used in the miniaturized design of base station filters and antenna feed networks.

[0003] like Figure 1 As shown, most TM-type dielectric resonators 01 in related technologies operate in a single mode, thus having limited volume integration. They require multi-face pressing or welding to a shielded metal cavity 02. For the former pressing assembly method, the pressing surfaces are prone to poor contact due to tolerances and environmental temperature changes, resulting in insufficient passive intermodulation levels and instability. For the latter welding assembly method, the multi-face welding process is complex, increasing manufacturing costs. Furthermore, because welding creates a rigid connection between the dielectric resonator and the metal cavity, and the dielectric material and metal material have significant inherent differences in their coefficients of thermal expansion, the weld sites and dielectric material are prone to cracking under stress in long-term operating temperature-changing environments, posing a serious reliability risk.

[0004] In addition, the aforementioned TM type dielectric resonator 01 requires an external shielding metal cavity 02, resulting in problems such as large size and weight; furthermore, the TM type dielectric resonator 01 also requires parameter adjustment by setting a tuning screw 04, which also increases the size and weight. Summary of the Invention

[0005] The purpose of this application is to provide a multimode dielectric resonator, filter, and base station that can solve problems such as large size and weight of the resonator.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows: This application provides a multimode dielectric resonator, comprising: a non-metallic dielectric body and a metallization layer; The dielectric body has a first end face, a second end face, and an outer peripheral surface. The first end face and the second end face are respectively provided with a first groove for enhancing the Q value of the multimode dielectric resonator. The outer peripheral surface is provided with a plurality of second grooves for adjusting the resonant frequency, and the plurality of second grooves are arranged in different directions; The metallization layer covers the outer peripheral surface and part or all of the groove walls of each of the second grooves, serving to form a signal shielding boundary on the outer periphery of the medium.

[0007] This application embodiment also provides a filter, including at least one of the above-described multimode dielectric resonator, a power input device, and a power output device; The power input and power output are respectively connected to the at least one multimode dielectric resonator.

[0008] This application also provides a base station including the above-described filter.

[0009] In this embodiment, the dielectric body is used for electromagnetic wave propagation. First grooves are provided on the first and second end faces of the dielectric body to enhance the Q value of the multimode dielectric resonator. Multiple second grooves are provided on the outer peripheral surface of the dielectric body to adjust the resonant frequency of the multimode dielectric resonator. Furthermore, the multiple second grooves are arranged in different directions to support multiple resonant modes with different polarization directions. Additionally, by covering the outer peripheral surface of the dielectric body and the partial or complete groove walls of the second grooves with a metallization layer, an electromagnetic wave signal shielding boundary can be formed on the outer periphery of the dielectric body, effectively shielding electromagnetic waves propagating within the dielectric body. This effectively alleviates the problem of electromagnetic wave signal distortion caused by electromagnetic wave leakage. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of a TM-type dielectric resonator in related technologies. Figure 2 This is a schematic diagram of the structure of the multimode dielectric resonator disclosed in the embodiments of this application; Figure 3 This is a schematic diagram of the filter structure disclosed in the embodiments of this application; Figure 4 This is a cross-sectional schematic diagram of the filter disclosed in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the metal sheet disclosed in the embodiments of this application; Figure 6 The image shows the simulation results of the filter S-parameters disclosed in the embodiments of this application.

[0011] Explanation of reference numerals in the attached figures: 01-TM type dielectric resonator; 02-shielded metal cavity; 03-weld layer; 04-tuning screw; 10-Multimode dielectric resonator; 11-Dielectric body; 111-First end face; 1111-First groove; 1112-Third groove; 1113-Fourth groove; 11131-Elongated groove; 11132-Arc-shaped groove; 112-First side surface; 1121-Second groove; 113-Third side surface; 20 - Power input device; 30-Power supply output unit; 40 - Thin metal sheet; 41 - Perforated pattern; 50 - Single-mode dielectric resonator; 51 - Fifth groove. Detailed Implementation

[0012] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0013] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0014] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0015] refer to Figures 2 to 5 This application discloses a multimode dielectric resonator 10, which includes a dielectric body 11 and a metallization layer (not shown in the figure). Optionally, the multimode dielectric resonator 10 can be a TM-type multimode dielectric resonator 10.

[0016] The dielectric 11 is made of a non-metallic material to allow electromagnetic wave signals to pass through. Optionally, the non-metallic material can be ceramic, or other materials, as long as they can meet the propagation requirements of electromagnetic wave signals; the specific material is not limited.

[0017] The metallization layer is used to shield electromagnetic wave signals. Optionally, the metallization layer can be made of silver and its alloys, copper and its alloys, etc., or other materials, as long as they can provide good shielding for electromagnetic wave signals. The specific material is not limited.

[0018] Optionally, the dielectric body 11 can be formed and sintered by means of mold pressing or machining; the surface part of the formed and sintered dielectric body 11 is metallized by silver or other methods, and the non-metallized area is desilvered to complete the manufacturing of the multimode dielectric resonator 10.

[0019] Figure 2 This is a schematic diagram of the structure of the multimode dielectric resonator disclosed in the embodiments of this application, with reference to... Figure 2 The medium 11 may have a first end face 111, a second end face, and an outer peripheral surface. Optionally, the medium 11 may be a three-dimensional structure, with the first end face 111 and the second end face located at the two ends of the medium 11 along the extension direction of the medium 11, and the outer peripheral surface being the side wall surface of the medium 11.

[0020] The first end face 111 may be provided with a first groove 1111. By providing the first groove 1111, the Q value of the multimode dielectric resonator 10 can be enhanced. The Q value refers to the ratio of the energy storage capacity to the loss characteristics of the multimode dielectric resonator 10 in the resonant state. It should be noted that when the electromagnetic wave signal passes through the region of the first end face 111 of the dielectric body 11, the presence of the first groove 1111 causes the electromagnetic wave signal to propagate from inside the dielectric body 11 to the internal space of the first groove 1111, resulting in a change in the propagation medium of the electromagnetic wave signal (e.g., the electromagnetic wave signal enters the air inside the first groove 1111 from the dielectric body 11). This affects the energy loss during the propagation of the electromagnetic wave signal, thus enhancing the Q value of the multimode dielectric resonator 10.

[0021] Similarly, the second end face can also be provided with a first groove 1111. By providing the first groove 1111, the Q value of the multimode dielectric resonator 10 can be enhanced. It should be noted here that when the electromagnetic wave signal passes through the second end face region of the dielectric body 11, due to the presence of the first groove 1111, the electromagnetic wave signal propagates from inside the dielectric body 11 to the internal space of the first groove 1111, causing a change in the propagation medium of the electromagnetic wave signal (e.g., the electromagnetic wave signal enters the air inside the first groove 1111 from the dielectric body 11). This will affect the energy loss during the propagation of the electromagnetic wave signal, and thus can enhance the Q value of the multimode dielectric resonator 10.

[0022] In addition, the outer peripheral surface may be provided with a plurality of second grooves 1121, which are arranged in different directions to guide the polarization direction of different resonant modes and to adjust the resonant frequency of the multimode dielectric resonator 10 for different directions. Based on this, since the plurality of second grooves 1121 are arranged in different directions, the plurality of second grooves 1121 can be used to guide the polarization direction of different resonant modes and play a role in frequency tuning.

[0023] Optionally, a plurality of second grooves 1121 can be arranged circumferentially on the outer peripheral surface of the medium body 11. Of course, the plurality of second grooves 1121 can also be arranged in other ways on the outer peripheral surface, which can be set according to actual needs. In addition, the second grooves 1121 can be blind grooves.

[0024] A metallization layer covers the outer peripheral surface of the dielectric body 11 and part or all of the groove walls of each second groove 1121, serving to form a signal shielding boundary on the outer periphery of the dielectric body 11. Optionally, the metallization layer can be formed by electroplating, coating, spraying, etc., and of course, other methods are also possible, which are not specifically limited here.

[0025] In addition, by covering all the groove walls of each second groove 1121 with a metallization layer, electromagnetic wave signals can be effectively prevented from leaking outward from the second groove 1121, thereby ensuring the quality of electromagnetic wave signals.

[0026] Of course, in some cases, after the multimode dielectric resonator 10 is manufactured, it is necessary to test it. Therefore, a metallization layer can be used to cover a portion of the groove wall of each second groove 1121, leaving a portion of the groove wall uncovered by the metallization layer. This allows for the detection of electromagnetic wave signals at that location during testing, thereby enabling the testing of the multimode dielectric resonator 10. It should be noted that the signal testing principle and process of the multimode dielectric resonator 10 can be found in relevant technologies and will not be elaborated upon here.

[0027] In this embodiment, the dielectric body 11 is used for electromagnetic wave propagation. The Q value of the multimode dielectric resonator 10 is enhanced by providing first grooves 1111 on the first end face 111 and the second end face of the dielectric body 11, and the resonant frequency of the multimode dielectric resonator 10 is adjusted by providing multiple second grooves 1121 on the outer peripheral surface of the dielectric body 11. The multiple second grooves 1121 are arranged in different directions to support multiple resonant modes with different polarization directions. In addition, by covering the outer peripheral surface of the dielectric body 11 and the partial or complete groove walls of the second grooves 1121 with a metallization layer, an electromagnetic wave signal shielding boundary can be formed on the outer periphery of the dielectric body 11, which plays a shielding role against electromagnetic waves propagating inside the dielectric body 11, thereby effectively alleviating the problem of electromagnetic wave signal distortion caused by electromagnetic wave leakage.

[0028] In some embodiments, the dielectric body 11 can be a regular columnar structure, with its first end face 111 and second end face arranged opposite to each other along the axial direction of the multimode dielectric resonator 10, while its outer peripheral surface can be arranged around the circumference of the dielectric body 11, with one end of the outer peripheral surface along the axial direction connected to the first end face 111, wherein the axial direction is perpendicular to the circumference. Based on this, it is beneficial to allow electromagnetic wave signals to pass through the dielectric body 11 and reduce energy loss, thereby reducing heat generation.

[0029] Optionally, the medium 11 can be a columnar structure with a polygonal cross-section, such as a cuboid, cube, hexagonal prism, etc. Alternatively, the medium 11 can be a columnar structure with a circular or elliptical cross-section. Of course, it can also be other shapes, which are not specifically limited here.

[0030] In some more specific embodiments, the medium 11 can be a cuboid, and its outer peripheral surface can include a first side surface 112, a second side surface, a third side surface 113, and a fourth side surface. The first side surface 112 and the second side surface are arranged opposite to each other along a first direction, and the third side surface 113 is arranged opposite to the fourth side surface, such that the first side surface 112, the third side surface 113, the second side surface, and the fourth side surface are connected sequentially along the circumferential direction to form the outer peripheral surface, wherein the first direction, the second direction, and the axial direction are perpendicular to each other.

[0031] Furthermore, the first side 112 and the third side 113 may each be provided with a second groove 1121. In this way, the groove opening of the second groove 1121 on the first side 112 faces the first direction, and the groove opening of the second groove 1121 on the third side 113 faces the second direction, so that the second groove 1121 on the first side 112 and the second groove 1121 on the third side 113 face two mutually perpendicular directions, thereby enabling the multimode dielectric resonator 10 to support two resonant modes with mutually perpendicular polarization directions.

[0032] Accordingly, the metallization layer can cover the first side 112, the second side, the third side 113, and the fourth side, respectively. In addition, the metallization layer can also cover part or all of the groove wall of the second groove 1121 provided on the first side 112, and part or all of the groove wall of the second groove 1121 provided on the third side 113, respectively. Based on this, an electromagnetic wave signal shielding boundary can be formed on the outer periphery of this type of dielectric body 11 by the metallization layer, thereby ensuring that the electromagnetic wave signal can propagate within this type of dielectric body 11 without leakage, and also meeting the testing requirements of the multimode dielectric resonator 10. It should be noted that the metallization layers covering the above-mentioned locations are interconnected to achieve a complete shielding effect.

[0033] In other embodiments, the dielectric body 11 can also be a regular hexagonal prism, in which case the outer peripheral surface can include six side surfaces, and three side surfaces arranged in sequence can each be provided with a second groove 1121, and the second grooves 1121 on the three side surfaces face three directions with an included angle of 120°, so that the multimode dielectric resonator 10 can support three resonance modes with polarization directions at an included angle of 120°.

[0034] Of course, it is not limited to the above methods. The dielectric 11 can also be in other forms, thereby realizing different resonance modes.

[0035] In some embodiments, the bottom of the first groove 1111 may be provided with a third groove 1112, which is used to construct and adjust the internal coupling between multiple modes in the multimode dielectric resonator 10. Based on this, the frequency and coupling of the multimode dielectric resonator 10 can be freely configured and tuned by setting the third groove 1112.

[0036] It should be noted that the principle of frequency and coupling of the third groove 1112 for the multimode dielectric resonator 10 can be found in relevant technologies and will not be elaborated here. Furthermore, the shape, number, and arrangement of the third groove 1112 can be set according to actual needs and are not specifically limited here.

[0037] In some more specific embodiments, the third groove 1112 may be located in the middle region of the bottom of the first groove 1111, and in the plane where the bottom of the groove is located, the extension direction of the third groove 1112 is set at an angle to the second direction, wherein the second direction is perpendicular to the axial direction of the multimode dielectric resonator 10.

[0038] Optionally, the angle between the extension direction of the third groove 1112 and the second direction can be from 30° to 150°, for example, including 30°, 45°, 60°, 75°, 90°, 120°, 135°, 150°, etc. Of course, it can also be other degrees, which are not specifically limited here.

[0039] The third groove 1112 can be a through groove or a blind groove, and its depth direction is parallel to the axial direction of the multimode dielectric resonator 10. Alternatively, the third groove 1112 can be an elongated groove, such as a rectangular groove or other types of grooves.

[0040] Of course, when constructing the filter, if the internal coupling of the multimode dielectric resonator 10 is not required, the third groove 1112 can be omitted.

[0041] In some embodiments, the bottom of the first groove 1111 may also be provided with a plurality of fourth grooves 1113. The plurality of fourth grooves 1113 are distributed along the circumference of the multimode dielectric resonator 10 at the edge region of the bottom of the groove, and the fourth grooves 1113 are used to push away the higher harmonic frequencies in the multimode dielectric resonator 10. It should be noted that the principle of the fourth grooves 1113 in pushing away the higher harmonic frequencies can be found in related technologies, and will not be described in detail here.

[0042] Optionally, the fourth groove 1113 can be a through groove or a blind groove, and its depth direction is parallel to the axial direction of the multimode dielectric resonator 10.

[0043] In some more specific embodiments, the fourth groove 1113 may include an elongated groove portion 11131 and an arc-shaped groove portion 11132. The elongated groove portion 11131 communicates with the arc-shaped groove portion 11132, and the arc-shaped groove portion 11132 is located in the region near the outer peripheral surface and has an opening at the outer peripheral surface. The elongated groove portion 11131 is located on the side of the arc-shaped groove portion 11132 away from the outer peripheral surface.

[0044] When the cross-section of the first groove 1111 is polygonal, multiple fourth grooves 1113 can be respectively disposed at multiple corners of the first groove 1111. For example, if the cross-section of the first groove 1111 is rectangular, there are four fourth grooves 1113, which are respectively disposed at the four corners of the rectangle.

[0045] Based on the multimode dielectric resonator 10 described above, this application also discloses a filter, which includes at least one of the multimode dielectric resonator 10, a power input device 20, and a power output device 30. Figure 3 This is a schematic diagram of the filter structure disclosed in an embodiment of this application. Figure 4 5 is a cross-sectional schematic diagram of the filter disclosed in an embodiment of this application, and 6 is a structural schematic diagram of the metal sheet disclosed in an embodiment of this application. (Refer to...) Figures 3 to 5 .

[0046] The power input device 20 and the power output device 30 are respectively connected to at least one multimode dielectric resonator 10. Based on this, an electromagnetic wave signal can be input to at least one multimode dielectric resonator 10 through the power input device 20, and after the electromagnetic wave signal is processed by the multimode dielectric resonator 10, it is output from the power output device 30.

[0047] Optionally, the power input device 20 or the power output device 30 can respectively achieve mode excitation through probes or strip lines, and the excitation object can be a multimode dielectric resonator 10, or of course, a single-mode dielectric resonator 50.

[0048] Specifically, when there is one multimode dielectric resonator 10, the power input component 20 and the power output component 30 are respectively connected to the multimode dielectric resonator 10; when there are two multimode dielectric resonators 10, the two multimode dielectric resonators 10 are coupled together, the power input component 20 is connected to one of the multimode dielectric resonators 10, and the power output component 30 is connected to the other multimode dielectric resonator 10; when there are three or more multimode dielectric resonators 10, the three or more multimode dielectric resonators 10 are coupled together in sequence, the power input component 20 is connected to the multimode dielectric resonator 10 located at one end, and the power output component 30 is connected to the multimode dielectric resonator 10 located at the other end.

[0049] In some embodiments, at least one multimode dielectric resonator 10 may include a plurality of multimode dielectric resonators 10 stacked sequentially along the axial direction of the plurality of multimode dielectric resonators 10, wherein the first end face 111 of one of two adjacent multimode dielectric resonators 10 is coupled to the second end face of the other, and the first groove 1111 of one of them is correspondingly provided with the first groove 1111 of the other.

[0050] Based on the above configuration, electromagnetic wave signals can propagate between two adjacent multimode dielectric resonators 10, and their respective Q values ​​can be enhanced through their respective first grooves 1111, thereby improving the overall performance of the filter.

[0051] In addition, along the axial direction of the multimode dielectric resonator 10, multiple multimode dielectric resonators 10 are correspondingly arranged in the second groove 1121 on the same side along the axial direction, so as to adjust their respective resonant frequencies, thereby achieving the tuning of the overall resonant frequency of the filter.

[0052] In some embodiments, the filter may further include a metal sheet 40 connected between a first end face 111 of one of two adjacent multimode dielectric resonators 10 and a second end face of the other, and the metal sheet 40 is provided with at least one perforated pattern 41, such as... Figure 5 As shown, the hollow pattern 41 connects the first groove 1111 of one of the two grooves 1111. Based on this, a coupling structure can be formed between two adjacent multimode dielectric resonators 10 by means of the metal sheet 40, thereby enabling the normal propagation of electromagnetic wave signals between the two adjacent multimode dielectric resonators 10 without obstruction; furthermore, the metal sheet 40 can also act as a buffer between the two adjacent multimode dielectric resonators 10 to alleviate the problem of easy collision and damage caused by direct contact between the two adjacent multimode dielectric resonators 10.

[0053] It should be noted that by setting the metal sheet 40, both electrical connection between two adjacent multimode dielectric resonators 10 and external coupling between them can be provided. Furthermore, this external coupling can be achieved through the perforated pattern 41 on the metal sheet 40. This external coupling can be positive or negative coupling. Additionally, since the metal sheet 40 is made of metal, it shields electromagnetic wave signals, preventing them from propagating between adjacent multimode dielectric resonators 10. The perforated pattern 41 provides a propagation path for the electromagnetic wave signals, ensuring efficient propagation between them. Moreover, the position, shape, and size of the perforated pattern 41 can be flexibly adjusted to adjust the polarity and strength of the external coupling.

[0054] Optionally, the metal sheet 40 and the multimode dielectric resonator 10 can be fixed by welding, bonding or other methods to ensure the stability of the fixation.

[0055] Continue to refer to Figure 3 and Figure 4 In some embodiments, the filter may further include at least one single-mode dielectric resonator 50 connected between the feed input 20 and the multimode dielectric resonator 10. Thus, the electromagnetic wave signal input via the feed input 20 can first be processed by the single-mode dielectric resonator 50 and then transmitted to the multimode dielectric resonator 10 for further processing, thereby enabling the realization of more different resonance modes. It should be noted that in this embodiment, both coupling connections between multimode dielectric resonators 10 and between multimode dielectric resonators 10 and single-mode dielectric resonators 50 can be achieved, thereby providing the filter with high design flexibility to meet the needs of various operating conditions.

[0056] Of course, the single-mode dielectric resonator 50 can also be connected between the power supply output device 30 and the multimode dielectric resonator 10. In this way, the electromagnetic wave signal processed by the multimode dielectric resonator 10 can be transmitted to the single-mode dielectric resonator 50 for processing again. After processing, it is output through the power supply output device 30, thereby realizing more different resonance modes.

[0057] In some more specific embodiments, the power input device 20, the single-mode dielectric resonator 50, at least one multimode dielectric resonator 10, the single-mode dielectric resonator 50, and the power output device 30 can be connected in sequence to facilitate the input, single-mode processing, multimode processing, and output of electromagnetic wave signals, thereby realizing more different resonance modes.

[0058] In some embodiments, the outer peripheral surface of the single-mode dielectric resonator 50 may be provided with a fifth groove 51, which is provided in correspondence with the second groove 1121 along the axial direction of the multimode dielectric resonator 10. In this way, a single resonant mode can be realized in the direction in which the fifth groove 51 is provided.

[0059] It should be noted that, since the outer peripheral surface of the dielectric body 11 is provided with multiple second grooves 1121 facing different directions, the fifth groove 51 can be provided in a corresponding manner to one of the second grooves 1121 along the axial direction of the multimode dielectric resonator 10.

[0060] The power input component 20 can be correspondingly arranged with the corresponding fifth groove 51. Specifically, when the single-mode dielectric resonator 50 is connected between the power input component 20 and the multi-mode dielectric resonator 10, the power input component 20 and the fifth groove 51 provided on the single-mode dielectric resonator 50 are correspondingly arranged along the axial direction.

[0061] In addition, the power output component 30 can be correspondingly arranged with the corresponding fifth groove 51. Specifically, when the single-mode dielectric resonator 50 is connected between the power output component 30 and the multi-mode dielectric resonator 10, the power output component 30 and the fifth groove 51 provided on the single-mode dielectric resonator 50 are correspondingly arranged along the axial direction.

[0062] In some embodiments, the metal sheet 40 can also be connected between the single-mode dielectric resonator 50 and the multimode dielectric resonator 10, and the hollow pattern 41 is connected to the first groove 1111 of the multimode dielectric resonator 10. Based on this, a coupling structure can be formed between the single-mode dielectric resonators 50 and 10, thereby enabling the normal propagation of electromagnetic wave signals between the multimode dielectric resonator 10 and 10 without obstruction. Furthermore, the metal sheet 40 can also act as a buffer between the multimode dielectric resonator 10 and 10, alleviating the problem of easy damage from direct contact between them. It should be noted that by providing the metal sheet 40, both an electrical connection between the multimode dielectric resonator 10 and 10 can be provided, and an external coupling can be constructed between them.

[0063] Alternatively, the external coupling can be achieved through the perforated pattern 41 provided on the metal sheet 40. The external coupling can be positive or negative coupling, and the position, shape, and size of the perforated pattern 41 can be flexibly adjusted to adjust the polarity and intensity of the external coupling.

[0064] Optionally, the metal sheet 40 and the multimode dielectric resonator 10 can be fixed by welding, bonding or other methods to ensure the stability of the fixation.

[0065] Figure 6 The following is a simulation result diagram of the S-parameters of a filter using the aforementioned multimode dielectric resonator 10, as shown in the figure. Figure 6 As shown, its center frequency is 795MHz, the return loss is better than 20dB, and the insertion loss is less than 0.32dB. Therefore, the aforementioned multimode dielectric resonator 10 and filter can achieve excellent matching and filtering frequency selection performance by flexibly configuring and adjusting the frequency and coupling without the need for external metal cavities, additional support components, or coupling booms, demonstrating the technical advantages of miniaturization, lightweight design, and a simplified architecture.

[0066] Based on the above-described filter, this application also discloses a base station, which includes the above-described filter.

[0067] In summary, the embodiments of this application have the following technical advantages: 1. A single multimode dielectric resonator 10 can support multiple types of resonant modes, and its size is greatly reduced compared to conventional metal coaxial resonator solutions, thereby significantly improving the integration of filters and base stations designed accordingly. 2. The multimode dielectric resonator 10 forms self-shielding and self-encapsulation by setting a metallization layer. It can construct multimode boundary conditions and realize filters without adding external metal cavities or additional support components, which makes the overall architecture simple, has the advantages of lightweight and miniaturization technology, and optimizes the cost. 3. The assembly of the multimode dielectric resonator 10 does not require pressing or multi-sided welding, which reduces the difficulty of the process and avoids the intermodulation risk and long-term reliability risk brought about by the two assembly methods, thus achieving high performance and high reliability of the multimode dielectric resonator 10 and its filter. 4. The multimode dielectric filter and the single-mode dielectric resonator 50 are connected by a metal sheet 40, which can complete the connection and coupling without the need for components such as cavity coupling windows and coupling rods. At the same time, there is no need to use metal tuning screws; tuning can be completed by adjusting the metal layer. The integrated design makes the architecture more streamlined.

[0068] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A multimode dielectric resonator, characterized in that, include: A non-metallic dielectric (11) and a metallized layer; The dielectric body (11) has a first end face (111), a second end face and an outer peripheral surface. The first end face (111) and the second end face are respectively provided with a first groove (1111) for enhancing the Q value of the multimode dielectric resonator. The outer peripheral surface is provided with a plurality of second grooves (1121) for adjusting the resonant frequency. The plurality of second grooves (1121) are arranged in different directions. The metallization layer covers the outer peripheral surface and part or all of the groove walls of each of the second grooves (1121) to form a signal shielding boundary on the outer periphery of the medium (11).

2. The multimode dielectric resonator according to claim 1, characterized in that, The first end face (111) and the second end face are arranged opposite to each other along the axial direction of the multimode dielectric resonator (10). The outer peripheral surface is arranged around the circumference of the dielectric body (11), and one end of the outer peripheral surface along the axial direction is connected to the first end face (111), and the other end is connected to the second end face. The axial direction is perpendicular to the circumference.

3. The multimode dielectric resonator according to claim 2, characterized in that, The outer peripheral surface includes a first side surface (112), a second side surface, a third side surface (113), and a fourth side surface. The first side surface (112) and the second side surface are arranged opposite to each other along a first direction, and the third side surface (113) and the fourth side surface are arranged opposite to each other along a second direction. The first direction, the second direction, and the axial direction are perpendicular to each other. The first side (112) and the third side (113) are respectively provided with the second groove (1121); The metallization layer covers the first side (112) and part or all of the groove wall of its second groove (1121), the second side, the third side (113) and part or all of the groove wall of its second groove (1121), and the fourth side.

4. The multimode dielectric resonator according to claim 1, characterized in that, The bottom of the first groove (1111) is provided with a third groove (1112), which is used to construct and adjust the internal coupling between the multimodes in the multimode dielectric resonator (10).

5. The multimode dielectric resonator according to claim 4, characterized in that, The third groove (1112) is located in the middle region of the bottom of the groove, and in the plane where the bottom of the groove is located, the extension direction of the third groove (1112) is set at an angle to the second direction, and the second direction is perpendicular to the axial direction of the multimode dielectric resonator (10).

6. The multimode dielectric resonator according to claim 1, 4, or 5, characterized in that, The bottom of the first groove (1111) is also provided with a plurality of fourth grooves (1113). The plurality of fourth grooves (1113) are distributed along the circumference of the multimode dielectric resonator (10) at the edge region of the bottom of the groove. The fourth grooves (1113) are used to push away the higher harmonic frequencies in the multimode dielectric resonator (10).

7. A filter, characterized in that, It includes at least one multimode dielectric resonator (10), a power input device (20) and a power output device (30), wherein the multimode dielectric resonator (10) is the multimode dielectric resonator (10) according to any one of claims 1 to 6; The power input (20) and the power output (30) are respectively connected to the at least one multimode dielectric resonator (10).

8. The filter according to claim 7, characterized in that, The at least one multimode dielectric resonator (10) includes a plurality of multimode dielectric resonators (10) stacked sequentially along the axial direction of the multimode dielectric resonator (10). In two adjacent multimode dielectric resonators (10), the first end face (111) of one is coupled to the second end face of the other, and the first groove (1111) of one is correspondingly provided with the first groove (1111) of the other.

9. The filter according to claim 8, characterized in that, The filter also includes a metal sheet (40) having at least one perforated pattern (41). The metal sheet (40) is connected between the first end face (111) of one of two adjacent multimode dielectric resonators (10) and the second end face of the other. The hollow pattern (41) connects the first groove (1111) of one of the two and the first groove (1111) of the other, so as to form a coupling structure between the two adjacent multimode dielectric resonators (10) through the metal sheet (40).

10. The filter according to any one of claims 7 to 9, characterized in that, The filter further includes at least one single-mode dielectric resonator (50) connected between the power input (20) and the multimode dielectric resonator (10), and / or, the single-mode dielectric resonator (50) connected between the power output (30) and the multimode dielectric resonator (10).

11. The filter according to claim 10, characterized in that, The outer peripheral surface of the single-mode dielectric resonator (50) is provided with a fifth groove (51), and the fifth groove (51) and the second groove (1121) are arranged correspondingly along the axial direction of the multimode dielectric resonator (10). The power input component (20) or the power output component (30) is provided in correspondence with the corresponding fifth groove (51).

12. The filter according to claim 10, characterized in that, The filter also includes a metal sheet (40) having at least one perforated pattern (41). The metal sheet (40) is connected between the single-mode dielectric resonator (50) and the multi-mode dielectric resonator (10), and the hollow pattern (41) is connected to the first groove (1111) of the multi-mode dielectric resonator (10) so as to form a coupling structure between the single-mode dielectric resonator (50) and the multi-mode dielectric resonator (10) through the metal sheet (40).

13. A base station, characterized in that, Includes the filter described in any one of claims 7 to 12.

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