Multimode dielectric resonator and filter

Abstract

The application relates to a multi-mode dielectric resonator and filter, wherein when a first tuning assembly moves towards or away from a first recess to adjust a position, the adjustment can realize adjustment of one frequency mode; in addition, when a second tuning assembly moves towards or away from a side wall of the dielectric resonator to adjust a position, the adjustment can realize adjustment of another frequency mode, that is, multiple resonance frequencies can be generated in one resonance chamber, and product miniaturization is realized; in addition, a first recess is concavely arranged on the top of the dielectric resonator and faces an insulating base, which can not only realize mutual approach of the above-mentioned at least two different frequency modes, thereby improving product performance, but also realize adjustment of an unnecessary frequency mode to be far away from the passband of the filter, thereby reducing insertion loss and improving suppression.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filter, in particular to a multi-mode dielectric resonator and filter. BACKGROUND

[0002] With the rapid development of wireless communication technology and the concept of green base station to reduce environmental pollution, the demand for miniaturization of radio frequency modules is increasing. Filter is a frequency selection device, which is an important component of radio frequency module and plays an important role in the field of high performance and miniaturization. Filter has the characteristics of miniaturization and high performance, and is paid more and more attention. Among them, as an important part of the filter, how to reduce the insertion loss and improve the suppression is a problem that must be considered in the design process. Generally, in the traditional filter, in order to improve the suppression of the filter, multiple resonant cavities need to be added. However, this will make the size of the filter increase with the increase of the resonant cavities. SUMMARY

[0003] Therefore, it is necessary to overcome the defects of the prior art and provide a multi-mode dielectric resonator and filter, which can reduce the size of the filter without sacrificing the suppression and reducing the insertion loss.

[0004] A multi-mode dielectric resonator, comprising:

[0005] a housing, the housing is formed with a resonant cavity;

[0006] an insulating seat, the insulating seat is located inside the resonant cavity and connected to the bottom of the resonant cavity;

[0007] a dielectric resonator, the dielectric resonator is located inside the resonant cavity and connected to the insulating seat, the top of the dielectric resonator is formed with a first recess recessed towards the insulating seat;

[0008] a first tuning assembly, the first tuning assembly is installed on the top of the housing, the first tuning assembly can move to adjust the position towards or away from the first recess; and

[0009] a second tuning assembly, the second tuning assembly is installed on the side of the housing, the second tuning assembly can move to adjust the position towards or away from the side wall of the dielectric resonator.

[0010] In one embodiment, the second tuning assembly is provided with two, two of the second tuning assemblies are respectively installed on two adjacent sides of the housing, and the movement directions of the two second tuning assemblies are arranged at an angle.

[0011] In one of the embodiments, the outer periphery of the bottom wall of the first recess is formed with an adjusting hole.

[0012] In one of the embodiments, the adjusting hole is provided in at least two and is arranged in sequence along the outer periphery of the first recess.

[0013] In one of the embodiments, the adjusting hole is four, and the four adjusting holes are arranged at the four corners of the bottom wall of the first recess.

[0014] In one of the embodiments, the bottom of the dielectric resonator is formed with a second recess recessed towards the direction close to the top surface of the dielectric resonator, and the insulating base extends into the interior of the second recess.

[0015] In one of the embodiments, the bottom wall of the shell is provided with a frequency adjusting structure, which is located inside the resonant cavity and below the dielectric resonator; and in the direction perpendicular to the bottom wall of the shell, the frequency adjusting structure is arranged opposite to the outer periphery of the dielectric resonator.

[0016] In one of the embodiments, the frequency adjusting structure comprises a plurality of protruding parts provided on the bottom wall of the shell, and the plurality of protruding parts are arranged in sequence and spaced along the circumferential direction of the insulating base.

[0017] In one of the embodiments, the frequency adjusting structure comprises a plurality of adjusting members provided on the bottom wall of the shell, and the plurality of adjusting members are arranged in sequence and spaced along the circumferential direction of the insulating base, and the adjusting members are adjustable in the direction perpendicular to the bottom wall of the shell.

[0018] In one of the embodiments, the frequency adjusting structure comprises a first boss provided on the bottom wall of the shell, and the first boss is arranged along the circumferential direction of the insulating base.

[0019] In one of the embodiments, the frequency adjusting structure comprises a second boss connected to the top of the first boss, and the second boss is arranged along the circumferential direction of the insulating base.

[0020] In one of the embodiments, the insulating base is formed with a third recess, and the multi-mode dielectric resonator further comprises a fastener, which comprises a fastening screw and a fastening nut provided in correspondence with the fastening screw, the fastening nut is located in the third recess, and the fastening screw is connected with the fastening nut by sequentially penetrating the bottom wall of the shell and the insulating base.

[0021] In one of the embodiments, the insulating base is formed with a third recess, and the bottom wall of the first recess is provided with an operation hole arranged opposite to the third recess, and the multi-mode dielectric resonator further comprises a fastener which can pass through the operation hole and penetrate through the bottom wall of the insulating base and the bottom wall of the shell so that the insulating base is fixedly connected to the bottom wall of the shell, and the head of the fastener is located inside the third recess.

[0022] In one of the embodiments, the first tuning assembly comprises a first tuning member which is located inside the resonant chamber and opposite to the first recess, and the first tuning member can be moved towards or away from the first recess to adjust the position; and the second tuning assembly comprises a second tuning member which is located inside the resonant chamber and opposite to the side wall of the dielectric resonator, and the second tuning member can be moved towards or away from the side wall of the dielectric resonator to adjust the position.

[0023] In one of the embodiments, the first tuning assembly further comprises a first adjusting screw and a first adjusting nut, the first tuning member is connected to the first adjusting screw, the first adjusting screw is arranged through the top of the shell, the first adjusting nut is connected to the first adjusting screw, and the first adjusting screw is located outside the shell.

[0024] The second tuning assembly further comprises a second adjusting screw and a second adjusting nut, the second tuning member is connected to the second adjusting screw, the second adjusting screw is arranged through the side wall of the shell, the second adjusting nut is connected to the second adjusting screw, and the second adjusting screw is located outside the shell.

[0025] In one of the embodiments, the first tuning member is a tuning disc, a tuning rod or a tuning block; and / or, the second tuning member is a tuning disc, a tuning rod or a tuning block.

[0026] In one of the embodiments, the shell comprises a main body and a cover plate, the top of the main body is formed with an opening, and the cover plate is arranged on the opening of the main body to form a resonant chamber together with the main body.

[0027] A filter comprising the multi-mode dielectric resonator.

[0028] The aforementioned multimode dielectric resonator and filter, by having a first tuning component mounted on the top of the housing, can achieve adjustment of one frequency mode when the first tuning component moves toward or away from the first recess. Furthermore, a second tuning component is mounted on the side of the housing; when the second tuning component moves toward or away from the side wall of the dielectric resonator, it can achieve adjustment of another frequency mode. This means that multiple resonant frequencies can be generated within a single resonant cavity, enabling product miniaturization. Additionally, the first recess formed on the top of the dielectric resonator, facing the insulating base, not only allows at least two different frequency modes to move closer together, thereby improving product performance, but also allows unwanted frequency modes to be adjusted away from the filter's passband, thus reducing insertion loss and improving suppression. Attached Figure Description

[0029] Figure 1 This is an exploded view of the multimode dielectric resonator according to the first embodiment of this application.

[0030] Figure 2 for Figure 1 The diagram shows the structure of the main body and the dielectric resonator in the structure shown.

[0031] Figure 3 for Figure 1 The diagram shows the structure of the dielectric resonator, the first tuning component, the second tuning component, and the fasteners in the structure shown.

[0032] Figure 4 for Figure 1 The cross-sectional view of the structure shown.

[0033] Figure 5 This is a cross-sectional view of the multimode dielectric resonator according to the second embodiment of this application.

[0034] Figure 6 A structural diagram showing a multimode dielectric resonator with a frequency adjustment structure according to an embodiment of this application.

[0035] Figure 7 A structural diagram showing a multimode dielectric resonator with a frequency adjustment structure according to another embodiment of this application.

[0036] 10, housing; 101, resonant cavity; 11, main body; 12, cover plate; 13, frequency adjusting structure; 131, protrusion; 20, insulating base; 21, third recess; 30, dielectric resonator; 31, first recess; 311, adjusting hole; 32, second recess; 33, surrounding edge; 40, first tuning assembly; 41, first tuning member; 42, first adjusting screw; 43, first adjusting nut; 50, second tuning assembly; 51, second tuning member; 52, second adjusting screw; 53, second adjusting nut; 60, fastening member; 61, fastening screw; 62, fastening nut. DETAILED DESCRIPTION

[0037] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways beyond the specific embodiments described and claimed herein, and it is therefore intended that the present application not be limited to the embodiments presented herein.

[0038] Reference Figures 1 to 4 In an embodiment of the present application, a multi-mode dielectric resonator is provided, which comprises a housing 10, an insulating base 20, a dielectric resonator 30, a first tuning assembly 40 and a second tuning assembly 50.

[0039] The housing 10 forms a resonant cavity 101.

[0040] Optionally, the housing 10 comprises a main body 11 and a cover plate 12. The top of the main body 11 is formed with an opening, and the cover plate 12 is arranged on the opening of the main body 11 to form the resonant cavity 101 together with the main body 11.

[0041] The insulating base 20 is arranged inside the resonant cavity 101 and connected to the bottom of the resonant cavity 101.

[0042] The insulating base 20 is made of an insulating material, which can improve the Q value and reduce the insertion loss. Optionally, the insulating base 20 is made of, but not limited to, alumina.

[0043] The insulating base 20 is arranged at the center of the resonant cavity 101, which supports and insulates the dielectric resonator 30, so that the dielectric resonator 30 is away from the bottom wall of the resonant cavity 101 and prevents contact with the housing 10. After the insulating base 20 is fixedly arranged on the bottom wall of the housing 10, the dielectric resonator 30 is fixedly arranged on the insulating base 20, for example, by adhesion.

[0044] The dielectric resonator 30 has the characteristics of resonance mode at a specific frequency, high Q value, miniaturization, low loss, etc., and has a wide application in the fields of wireless communication, radar, electronic countermeasure, etc.

[0045] Optionally, the material of the dielectric resonator 30 includes but is not limited to ceramic, quartz, etc., and the commonly used dielectric constant is, for example, 9.8-45. The dielectric resonator 30 has a cuboid structure, and the length and width of the cuboid structure do not require to be equal, and can be flexibly adjusted and set according to each frequency mode.

[0046] The dielectric resonator 30 is located inside the resonant chamber 101 and connected to the insulating seat 20, and the top of the dielectric resonator 30 is formed with a first recess 31 recessed towards the insulating seat 20.

[0047] Optionally, the first recess 31 includes but is not limited to a rectangular, circular, elliptical, triangular, pentagonal, hexagonal or other regular shape and irregular shape in the projection profile of the top surface of the dielectric resonator 30 in the direction perpendicular to the top surface of the dielectric resonator 30, and can be flexibly adjusted and set according to actual needs, which is not limited herein.

[0048] The first tuning assembly 40 is arranged on the top of the shell 10, and the first tuning assembly 40 can move to adjust the position close to or away from the first recess 31, thereby playing a tuning role. Specifically, the first tuning assembly 40 includes a first tuning piece 41, the first tuning piece 41 is located inside the resonant chamber 101, the first tuning piece 41 is opposite to the first recess 31, and the first tuning piece 41 can move to adjust the position close to or away from the first recess 31. Optionally, the first tuning piece 41 includes but is not limited to a tuning disc, a tuning rod or a tuning block.

[0049] The second tuning assembly 50 is arranged on the side of the shell 10, and the second tuning assembly 50 can move to adjust the position close to or away from the side wall of the dielectric resonator 30, thereby playing a tuning role. Specifically, the second tuning assembly 50 includes a second tuning piece 51, the second tuning piece 51 is located inside the resonant chamber 101, the second tuning piece 51 is opposite to the side wall of the dielectric resonator 30, and the second tuning piece 51 can move to adjust the position close to or away from the side wall of the dielectric resonator 30. Optionally, the second tuning piece 51 includes but is not limited to a tuning disc, a tuning rod or a tuning block.

[0050] Specifically, the first tuning assembly 40 is arranged on the cover plate 12, and the second tuning assembly 50 is arranged on the main body 11.

[0051] Since the first tuning assembly 40 is arranged on the top of the shell 10, the first tuning piece 41 is opposite to the first recess 31, and when the first tuning piece 41 moves to adjust the position close to or away from the first recess 31, the adjustment of one frequency mode can be realized; in addition, the second tuning assembly 50 is arranged on the side of the shell 10, and the second tuning piece 51 is opposite to the side wall of the dielectric resonator 30, and when the second tuning piece moves to adjust the position close to or away from the side wall of the dielectric resonator 30, the adjustment of another frequency mode can be realized, that is, multiple resonance frequencies can be generated in one resonant cavity 101, and the product miniaturization can be realized; in addition, the top of the dielectric resonator 30 is formed with the first recess 31 recessed towards the insulating seat 20, which not only can realize the mutual approach of the above-mentioned at least two different frequency modes, thereby improving the product performance, but also can realize the adjustment of the unnecessary frequency mode to be away from the passband of the filter, thereby reducing the insertion loss and improving the suppression.

[0052] Among them, the frequency mode adjusted by the first tuning assembly 40 is set as the first frequency mode, and the frequency mode adjusted by the second tuning assembly 50 is set as the second frequency mode. The frequency of the first frequency mode is lower than the frequency of the second frequency mode.

[0053] Optionally, the first tuning piece 41 and the second tuning piece 51 are each independently set according to actual needs, for example, are each set as a tuning disc. The tuning disc is a dielectric resonant disc made of ceramic or quartz and the like, and the specific dielectric material used is the same as or similar to the material of the dielectric resonator 30, which is not limited here and can be flexibly adjusted and set according to actual needs. When the first tuning assembly 40 drives the first tuning piece 41 to move to adjust the position close to the first recess 31, the frequency of the first frequency mode can gradually change from high to low. In addition, when the second tuning assembly 50 drives the second tuning piece 51 to move to adjust the position close to or away from the side wall of the dielectric resonator 30, the frequency of the second frequency mode can be fine-tuned, and the frequency of the first frequency mode can also be fine-tuned.

[0054] Of course, as some optional solutions, the first tuning piece 41 and the second tuning piece 51 can each also be a metal rod or a metal block to realize the tuning effect.

[0055] In some embodiments, the first recess 31 has a larger opening size, for example, greater than or equal to the outer diameter size of the first tuning member 41. In this way, the first tuning member 41 can move into the first recess 31 under the adjustment of the first tuning assembly 40, or move out of the first recess 31 under the adjustment of the first tuning assembly 40. Of course, as an alternative, the opening size of the first recess 31 can also be smaller than the outer diameter size of the first tuning member 41, so that the first tuning member 41 cannot enter the first recess 31.

[0056] Referring to Figures 1 to 4 In an embodiment, the second tuning assembly 50 is provided in two, and the two second tuning assemblies 50 are respectively arranged on two adjacent sides of the housing 10, and the movement directions of the two second tuning assemblies 50 are arranged at an angle. Specifically, when the second tuning member of the second tuning assembly 50 is a tuning disc, the disc faces of the two tuning discs are arranged at an angle. In this way, the two second tuning assemblies 50 respectively realize adjustment of two different frequency modes, and the two second tuning assemblies 50 respectively correspond to different frequency sizes of the adjusted frequency modes. In addition, simulation tests show that the first tuning assembly 40 and the two second tuning assemblies 50 can be respectively used to adjust the first three frequency modes of the dielectric resonator 30.

[0057] The frequency modes adjusted by the two second tuning assemblies 50 are respectively the second frequency mode and the third frequency mode. The frequency of the second frequency mode is lower than the frequency of the third frequency mode, and the frequencies of the second frequency mode and the third frequency mode are both higher than the frequency of the first frequency mode. Among them, the frequency of the first frequency mode is the lowest frequency in the resonant cavity 101, the frequency of the second frequency mode is the second lowest frequency in the resonant cavity 101, and the frequency of the third frequency mode is the third lowest frequency in the resonant cavity 101.

[0058] The first three frequency modes in the embodiment refer to the first frequency mode, the second frequency mode, and the third frequency mode.

[0059] Alternatively, the angle between the disc faces of the two tuning discs includes but is not limited to 45°, 60°, 75°, 90°, 105°, 120°, or 135°, and the like. Specifically, in the embodiment, the two adjacent sides of the housing 10 are arranged perpendicular to each other, and the disc faces of the two tuning discs are arranged perpendicular to each other.

[0060] Of course, in some alternative embodiments, the second tuning assembly 50 can also be provided in one, three, four, or other numbers, which are not limited here and can be flexibly adjusted and arranged according to actual needs.

[0061] Referring to Figure 2 and Figure 4In one embodiment, the outer periphery of the bottom wall of the first recess 31 is formed with an adjusting hole 311. The adjusting hole 311 includes but is not limited to a blind hole or a through hole. Thus, as can be known from the simulation diagram, the adjusting hole 311 formed on the bottom wall of the first recess 31 plays a role in adjusting the frequencies of the first three frequency modes, so that the first three frequency modes are all within the passband of the filter, thereby being effectively utilized.

[0062] The number of adjusting holes 311 can be one or at least two, and the adjusting holes 311 are arranged in sequence and at intervals along the outer periphery of the first recess 31. Thus, when the number of adjusting holes 311 is increased, i.e., the number of adjusting holes 311 is more than one, for example, at least two, specifically, two, three, four, five or six, etc., as can be known from the simulation diagram, the adjusting holes 311 play a better role in adjusting the frequencies of the first three frequency modes, so that the first three frequency modes are all within the passband of the filter, thereby being effectively utilized.

[0063] In one specific embodiment, the number of adjusting holes 311 is four, and the four adjusting holes 311 are arranged at the four corners of the bottom wall of the first recess 31. Thus, the adjusting holes 311 play a better role in adjusting the first three frequency modes, so that the frequencies of the first three frequency modes are relatively close to each other, thereby improving the performance of the product.

[0064] Please refer to Figure 4 and Figure 5 , Figure 5 Compared with the structure shown in Figure 4 , the main difference is that the bottom of the dielectric resonator 30 is formed with a second recess 32 concave toward the direction close to the top surface of the dielectric resonator 30, and the insulating seat 20 extends into the interior of the second recess 32. In other words, the bottom of the dielectric resonator 30 is provided with a surrounding edge 33, and the surrounding edge 33 cooperates with the bottom surface of the dielectric resonator 30 to form the second recess 32. Thus, the first three frequency modes are changed, the frequencies of the frequency modes are adjusted, and the frequencies of the three frequency modes are relatively close to each other, thereby improving the performance of the product. Of course, the bottom surface of the dielectric resonator 30 can also be in the form of a plane as shown in Figure 4 .

[0065] Please refer to Figure 5 , the depth S of the second recess 32 is adjustable, i.e., the height dimension of the surrounding edge 33 is adjustable. Specifically, by adjusting the depth S of the second recess 32, the frequencies of the second frequency mode and the third frequency mode can be adjusted.

[0066] In some embodiments, the second recess 32 includes, but is not limited to, a rectangular, circular, elliptical, triangular, pentagonal, hexagonal or other regular or irregular shape in a projection profile of the top surface of the dielectric resonator 30 in a direction perpendicular to the top surface of the dielectric resonator 30, which can be flexibly adjusted according to actual needs, and is not limited herein.

[0067] Referring to Figure 6 and Figure 7 In one embodiment, the bottom wall of the shell 10 is provided with a frequency adjustment structure 13. The frequency adjustment structure 13 is located inside the resonant cavity 101 and below the dielectric resonator 30. In a direction perpendicular to the bottom wall of the shell 10, the frequency adjustment structure 13 is arranged opposite to the outer circumferential position of the dielectric resonator 30. Specifically, the frequency adjustment structure 13 is arranged opposite to the surrounding edge 33. In this way, the frequency adjustment structure 13 can adjust the second frequency mode and the third frequency mode, so that the frequencies of the second frequency mode and the third frequency mode are closer to the frequency of the first frequency mode.

[0068] Based on the foregoing embodiment, the material of the frequency adjustment structure 13 includes, but is not limited to, a dielectric material such as ceramic or quartz.

[0069] Referring to Figure 6 In one embodiment, the frequency adjustment structure 13 includes a plurality of protrusions 131 arranged on the bottom wall of the shell 10, and the plurality of protrusions 131 are arranged in sequence and spaced apart around the circumference of the insulating seat 20. In this way, by adjusting the size of the protrusions 131, for example, adjusting the height of the protrusions 131 and the outer circumferential profile size of the protrusions 131, the frequencies of the second frequency mode and the third frequency mode can be adjusted, so that the frequencies of the second frequency mode and the third frequency mode are closer to the frequency of the first frequency mode.

[0070] In the embodiment, the protrusions 131 are, for example, cylinders, and the axial cross section of the cylinder includes, but is not limited to, a circular, elliptical or polygonal shape, etc. The polygonal shape is, for example, a triangular, quadrilateral, pentagonal or hexagonal shape, etc. In addition, the protrusions 131 can also be arranged in the form of an arc-shaped convex, etc.

[0071] Optionally, the number of the protrusions 131 includes, but is not limited to, two, three, four, five, six or more. In the embodiment, the protrusions 131 are arranged in four, and are arranged at the four corners of the bottom wall of the shell 10. In this way, the adjustment effect on the frequencies of the second frequency mode and the third frequency mode is better.

[0072] Of course, as an optional solution, the protrusions 131 can also be arranged in one, which can also adjust the frequencies of the second frequency mode and the third frequency mode.

[0073] It should be noted that the "protruding part 131" can be "part of the shell 10", that is, the "protruding part 131" is integrally formed with "other parts of the shell 10"; or it can be a separate component that can be separated from "other parts of the shell 10", that is, the "protruding part 131" can be independently manufactured and then combined with "other parts of the shell 10" to form an integral whole.

[0074] In one embodiment, the frequency adjusting structure 13 includes a plurality of adjusting members arranged on the bottom wall of the shell 10. The plurality of adjusting members are arranged in sequence and spaced apart in the circumferential direction of the insulating seat 20, and the adjusting members are adjustable in position in the direction perpendicular to the bottom wall of the shell 10. In this way, by adjusting the outer diameter size and the length size of the adjusting members extending into the resonant chamber 101, the frequencies of the second frequency mode and the third frequency mode can be adjusted, so that the frequencies of the second frequency mode and the third frequency mode are closer to the frequency of the first frequency mode.

[0075] Specifically, the adjusting member includes but is not limited to an adjusting screw, and the bottom wall of the shell 10 is provided with a threaded hole matched with the adjusting screw. In this way, by rotating the adjusting member, the length extending into the resonant chamber 101 can be adjusted steplessly.

[0076] Optionally, the number of adjusting members includes but is not limited to two, three, four, five, six or more. In the embodiment, the adjusting members are arranged in four and arranged at the four corners of the bottom wall of the shell 10. In this way, the adjustment effect of the frequencies of the second frequency mode and the third frequency mode is better.

[0077] Of course, as an optional solution, the adjusting member can also be arranged as one, which can also adjust the frequencies of the second frequency mode and the third frequency mode.

[0078] Please refer to Figure 7 In one embodiment, the frequency adjusting structure 13 includes a first boss arranged on the bottom wall of the shell 10. The first boss is arranged in the circumferential direction of the insulating seat 20. In this way, by adjusting the size of the first boss, for example, adjusting the height of the first boss and the wall thickness size of the first boss, the frequencies of the second frequency mode and the third frequency mode can be adjusted, so that the frequencies of the second frequency mode and the third frequency mode are closer to the frequency of the first frequency mode.

[0079] In one embodiment, the frequency adjusting structure 13 comprises a second boss. The second boss is connected to the top of the first boss, and the second boss is arranged around the circumference of the insulating base 20. In this way, by providing the second boss on the top of the first boss, and adjusting the height of the second boss and the thickness of the wall of the second boss, for example, the frequencies of the second frequency mode and the third frequency mode can be further adjusted so that the frequencies of the second frequency mode and the third frequency mode are closer to the frequency of the first frequency mode.

[0080] In the above formula, the thickness of the wall of the first boss and the thickness of the wall of the second boss each refers to the distance between one side wall surface facing the insulating base 20 and the other side wall surface away from the insulating base 20. Optionally, the thickness of the wall of the first boss is greater than the thickness of the wall of the second boss. In this way, the combined structure of the first boss and the second boss is in a stepped shape.

[0081] It should be noted that the "first boss" can be "part of the shell 10", that is, the "first boss" is integrally formed with "other parts of the shell 10"; or the "first boss" can be a separate component that can be separated from "other parts of the shell 10", that is, the "first boss" can be independently manufactured and then combined with "other parts of the shell 10" to form an integral whole. In addition, the "second boss" can be "part of the first boss", that is, the "second boss" is integrally formed with "other parts of the first boss"; or the "second boss" can be a separate component that can be separated from "other parts of the first boss", that is, the "second boss" can be independently manufactured and then combined with "other parts of the first boss" to form an integral whole.

[0082] Please refer to Figure 6 and Figure 7 In some embodiments, the multi-mode dielectric resonator further comprises a fastener 60. The insulating base 20 is fixedly installed on the bottom wall of the shell 10 by the fastener 60.

[0083] In one embodiment, the insulating base 20 is formed with a third recess 21, and the multi-mode dielectric resonator further comprises a fastener 60. The fastener 60 comprises a fastening screw 61 and a fastening nut 62 which is arranged in correspondence with the fastening screw 61, the fastening nut 62 is located in the third recess 21, and the fastening screw 61 is connected with the fastening nut 62 in sequence through the bottom wall of the shell 10 and the insulating base 20. In this way, on the one hand, by means of the fastening screw 61 and the fastening nut 62, the insulating base 20 can be stably installed and fixed on the bottom wall of the shell 10, facilitating disassembly and assembly; on the other hand, since the fastening nut 62 is located in the third recess 21, the fastening nut 62 can be relatively far away from the dielectric resonator 30, thereby reducing the adverse effects of the fastening nut 62 on the performance of the dielectric resonator 30.

[0084] Optionally, the fastening screw 61 and the fastening nut 62 are made of metal, which has high structural strength and can stably mount the insulating base 20 on the bottom wall of the shell 10. In addition, the fastening screw 61 and the fastening nut 62 can withstand high temperature and have long service life and are not easy to be damaged.

[0085] In another embodiment, the insulating base 20 is formed with a third recess 21, the bottom wall of the first recess 31 is provided with an operation hole arranged opposite to the third recess 21, and the multimode dielectric resonator further comprises a fastener 60, the fastener 60 can pass through the operation hole and penetrate the insulating base 20 and the bottom wall of the shell 10 so that the insulating base 20 is fixedly connected to the bottom wall of the shell 10, and the head of the fastener 60 is located inside the third recess 21. In this way, in the case that the dielectric resonator 30 is provided with the operation hole, the fastener 60 can be conveniently disassembled and assembled from top to bottom, so that the insulating base 20 is stably mounted on the bottom wall of the shell 10. In addition, when the fastener 60 is a fastening screw 61, a threaded hole corresponding to the fastening screw 61 is formed on the bottom wall of the shell 10, so that the fastening nut 62 can be omitted.

[0086] Please refer to Figure 3 and Figure 4 In one embodiment, the first tuning assembly 40 further comprises a first adjusting screw 42 and a first adjusting nut 43. The first tuning member 41 is connected to the first adjusting screw 42, the first adjusting screw 42 is arranged to penetrate the top of the shell 10, and the first adjusting nut 43 is connected to the first adjusting screw 42 and the first adjusting screw 42 is located outside the shell 10.

[0087] In addition, the second tuning assembly 50 further comprises a second adjusting screw 52 and a second adjusting nut 53. The second tuning member 51 is connected to the second adjusting screw 52, the second adjusting screw 52 is arranged to penetrate the side wall of the shell 10, the second adjusting nut 53 is connected to the second adjusting screw 52, and the second adjusting screw 52 is located outside the shell 10.

[0088] In some embodiments, the first adjusting screw 42 and the second adjusting screw 52 are made of insulating material. In this way, the adverse effects on the frequency modes of the dielectric resonator 30 can be reduced, thereby improving the performance of the product.

[0089] In addition, the connection modes of the first adjusting screw 42 and the first tuning member 41 and the connection modes of the second adjusting screw 52 and the second tuning member 51 include but are not limited to adhesive bonding or clamping, and can be flexibly adjusted and set according to actual needs, which are not limited herein.

[0090] In one embodiment, another embodiment of the present application provides a filter, the filter comprising the multi-mode dielectric resonator of any of the above embodiments. Optionally, the filter can be, for example, a diplexer, a duplexer, a splitter, a combiner, a top amplifier, etc., without limitation.

[0091] The filter described above, since the first tuning assembly 40 is arranged on the top of the shell 10, when the first tuning assembly 40 moves to the adjusting position close to or away from the first recess 31, the adjustment of one frequency mode can be realized; in addition, the second tuning assembly 50 is arranged on the side of the shell 10, when the second tuning assembly 50 moves to the adjusting position close to or away from the side wall of the dielectric resonator 30, the adjustment of another frequency mode can be realized, that is, multiple resonance frequencies can be generated in one resonant cavity 101, and the product miniaturization is realized; in addition, the top of the dielectric resonator 30 is formed with the first recess 31 recessed towards the insulating seat 20, not only the mutual approach of the above at least two different frequency modes can be realized, thereby improving the product performance, but also the adjustment of the frequency mode not needed to the passband away from the filter can be realized, thereby playing a role of reducing the insertion loss and improving the suppression.

[0092] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0093] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0094] In this application, unless otherwise clearly indicated and limited, if there are terms such as "mount", "connect", "connect", "fix", etc., these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0095] In this application, unless otherwise clearly indicated and limited, if there are terms such as "mount", "connect", "connect", "fix", etc., these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0096] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation.

[0097] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combination of the technical features does not exist Contradiction, it should be considered within the scope of the present application.

[0098] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the patent of the present application should be subject to the appended claims.

Claims

1. A multi-mode dielectric resonator, characterized by, The multi-mode dielectric resonator comprises: a housing formed with a resonant cavity; an insulating base located inside the resonant cavity and connected to the bottom of the resonant cavity; a dielectric resonator located inside the resonant cavity and connected to the insulating base, the top of the dielectric resonator being formed with a first recess concave towards the insulating base; a first tuning assembly installed on the top of the housing, the first tuning assembly being capable of moving to adjust the position towards or away from the first recess; and a second tuning assembly installed on the side of the housing, the second tuning assembly being capable of moving to adjust the position towards or away from the side wall of the dielectric resonator; wherein the outer periphery of the bottom wall of the first recess is formed with adjusting holes; the adjusting holes are at least two and are arranged in sequence along the outer periphery of the first recess.

2. The multi-mode dielectric resonator of claim 1, wherein, The second tuning assembly is provided with two, and the two second tuning assemblies are respectively installed on the two adjacent sides of the housing, and the movement directions of the two second tuning assemblies are arranged at an angle.

3. The multi-mode dielectric resonator of claim 1, wherein, The adjusting holes are four, and the four adjusting holes are respectively arranged at the four corners of the bottom wall of the first recess.

4. The multi-mode dielectric resonator of claim 1, wherein, The bottom of the dielectric resonator is formed with a second recess concave towards the direction close to the top surface of the dielectric resonator, and the insulating base extends into the inside of the second recess.

5. The multi-mode dielectric resonator of claim 1, wherein, The bottom wall of the housing is provided with a frequency adjusting structure, which is located inside the resonant cavity and below the dielectric resonator; in the direction perpendicular to the bottom wall of the housing, the frequency adjusting structure is arranged opposite to the outer periphery position of the dielectric resonator.

6. The multi-mode dielectric resonator of claim 5, wherein, The frequency adjusting structure comprises a plurality of protrusions arranged on the bottom wall of the housing, and the plurality of protrusions are arranged in sequence and spaced along the circumferential direction of the insulating base.

7. The multi-mode dielectric resonator of claim 5, wherein, The frequency adjusting structure comprises a plurality of adjusting members arranged on the bottom wall of the housing, and the plurality of adjusting members are arranged in sequence and spaced along the circumferential direction of the insulating base, and the adjusting members are adjustable in position in the direction perpendicular to the bottom wall of the housing.

8. The multi-mode dielectric resonator of claim 5, wherein, The frequency adjusting structure comprises a first boss arranged on the bottom wall of the housing, and the first boss is arranged along the circumferential direction of the insulating base.

9. The multi-mode dielectric resonator of claim 8, wherein, The frequency adjusting structure comprises a second boss connected to the top of the first boss, and the second boss is arranged along the circumferential direction of the insulating base.

10. The multi-mode dielectric resonator of claim 1, wherein, The insulating base is formed with a third recess, and the multi-mode dielectric resonator further comprises a fastener comprising a fastening screw and a fastening nut matched with the fastening screw, the fastening nut being located in the third recess, and the fastening screw being connected with the fastening nut by sequentially penetrating through the bottom wall of the housing and the insulating base.

11. The multi-mode dielectric resonator of claim 1, wherein, The insulating base is formed with a third recess, and the bottom wall of the first recess is provided with an operation hole arranged opposite to the position of the third recess, and the multi-mode dielectric resonator further comprises a fastener which can pass through the operation hole and penetrate through the bottom wall of the insulating base and the outer shell so that the insulating base is fixedly connected to the bottom wall of the outer shell, and the head of the fastener is located inside the third recess.

12. The multi-mode dielectric resonator of claim 1, wherein, The first tuning assembly comprises a first tuning member which is located inside the resonant chamber and opposite to the first recess, and the first tuning member can be moved towards or away from the first recess to adjust the position. The second tuning assembly comprises a second tuning member which is located inside the resonant chamber and opposite to the side wall of the dielectric resonator, and the second tuning member can be moved towards or away from the side wall of the dielectric resonator to adjust the position.

13. The multi-mode dielectric resonator of claim 12, wherein, The first tuning assembly further comprises a first adjusting screw and a first adjusting nut, the first tuning member is connected to the first adjusting screw, the first adjusting screw is arranged through the top of the outer shell, the first adjusting nut is connected to the first adjusting screw, and the first adjusting screw is located outside the outer shell. The second tuning assembly further comprises a second adjusting screw and a second adjusting nut, the second tuning member is connected to the second adjusting screw, the second adjusting screw is arranged through the side wall of the outer shell, the second adjusting nut is connected to the second adjusting screw, and the second adjusting screw is located outside the outer shell.

14. The multi-mode dielectric resonator of claim 12, wherein, The first tuning member is a tuning disc, a tuning rod or a tuning block; and / or the second tuning member is a tuning disc, a tuning rod or a tuning block.

15. The multi-mode dielectric resonator of claim 1, wherein, The outer shell comprises a main body and a cover plate, the top of the main body is formed with an opening, and the cover plate is arranged on the opening of the main body and forms a resonant chamber together with the main body.

16. A filter, characterized by The filter comprises the multi-mode dielectric resonator according to any one of claims 1 to 15.

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