Multi-mode dielectric resonator and filter

Abstract

According to the multimode dielectric resonator and the filter, when a first tuning assembly moves to an adjusting position close to or far away from a first concave part, adjustment of a frequency mode can be realized; besides, when the second tuning assembly moves towards the adjusting position close to or away from the side wall of the dielectric resonator, the adjustment of another frequency mode can be realized, namely, a plurality of resonant frequencies can be generated in one resonant cavity chamber, and the miniaturization of the product is realized; besides, the top of the dielectric resonator is provided with a first concave part which is concavely arranged towards the insulating seat, so that the at least two different frequency modes can be close to each other, the product performance is improved, the unwanted frequency mode can be adjusted to be far away from the passband of the filter, and the product quality is improved. And therefore, the effects of reducing insertion loss and improving suppression are achieved.

Description

Technical Field

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

[0002] With the rapid development of wireless communication technology and the concept of green base stations to reduce environmental pollution, the demand for miniaturization of RF modules is increasing. Filters are a frequency-selective device. As an important component of RF modules, they play a vital role in the field of high performance and miniaturization. Filters are characterized by miniaturization and high performance, and are receiving more and more attention. Among them, the resonator, as an important component of the filter, how to reduce insertion loss and improve suppression is an issue that must be considered in the design process. Generally, in traditional filters, in order to improve the suppression of the filter, multiple resonant cavities need to be added. However, this will cause the size of the filter to increase with the increase of the resonant cavity. Summary of the invention

[0003] Based on this, it is necessary to overcome the defects of the prior art and provide a multimode dielectric resonator and filter, which can achieve the purpose of reducing the size of the filter without sacrificing suppression and reducing insertion loss.

[0004] A multimode dielectric resonator, comprising:

[0005] a housing, the housing forming a resonant chamber;

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

[0007] A dielectric resonator, the dielectric resonator is located inside the resonant cavity and connected to the insulating seat, and a first recessed portion is formed on the top of the dielectric resonator and is recessed toward the insulating seat;

[0008] A first tuning component, the first tuning component is installed on the top of the housing, and the first tuning component can be moved to an adjustable position close to or away from the first recess; and

[0009] The second tuning component is installed on the side of the housing, and the second tuning component can be moved to an adjustable position close to or away from the side wall of the dielectric resonator.

[0010] In one embodiment, there are two second tuning components, and the two second tuning components are respectively installed on two adjacent side surfaces of the housing, and the movement directions of the two second tuning components are set at an angle.

[0011] In one embodiment, an adjustment hole is formed on the outer periphery of the bottom wall of the first recess.

[0012] In one embodiment, the number of the adjustment holes is at least two and they are arranged in sequence and at intervals along the outer circumference of the first recess.

[0013] In one embodiment, there are four adjustment holes, and the four adjustment holes are respectively arranged at four corners of the bottom wall of the first recess.

[0014] In one of the embodiments, a second recessed portion is formed at the bottom of the dielectric resonator and is recessed toward a direction close to the top surface of the dielectric resonator, and the insulating seat extends into the interior of the second recessed portion.

[0015] In one of the embodiments, a frequency adjustment structure is provided on the bottom wall of the shell, and the frequency adjustment structure is located inside the resonance chamber and below the dielectric resonator; in a direction perpendicular to the bottom wall of the shell, the frequency adjustment structure is arranged relative to the peripheral position of the dielectric resonator.

[0016] In one of the embodiments, the frequency adjustment structure includes a plurality of protrusions disposed on the bottom wall of the housing, and the plurality of protrusions are sequentially spaced around the circumference of the insulating seat.

[0017] In one embodiment, the frequency adjustment structure includes a plurality of adjustment members disposed on the bottom wall of the housing, the plurality of adjustment members are arranged in sequence and spaced apart around the circumference of the insulating seat, and the position of the adjustment members is adjustable along a direction perpendicular to the bottom wall of the housing.

[0018] In one embodiment, the frequency adjustment structure includes a first boss disposed on the bottom wall of the housing, and the first boss is arranged circumferentially around the insulating seat.

[0019] In one embodiment, the frequency adjustment structure includes 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 seat.

[0020] In one embodiment, the insulating seat is formed with a third recess, and the multi-mode dielectric resonator also includes a fastener, which includes a fastening screw and a fastening nut arranged to adapt to the fastening screw, and the fastening nut is located in the third recess. The fastening screw passes through the bottom wall of the shell and the insulating seat in sequence and is connected to the fastening nut.

[0021] In one embodiment, the insulating seat is formed with a third recess, and the bottom wall of the first recess is provided with an operating hole arranged opposite to the position of the third recess. The multi-mode dielectric resonator also includes a fastener, which can pass through the operating hole and penetrate the insulating seat and the bottom wall of the outer shell so that the insulating seat is fixedly connected to the bottom wall of the outer shell, and the head of the fastener is located inside the third recess.

[0022] In one embodiment, the first tuning component includes a first tuning member, the first tuning member is located inside the resonance chamber, the first tuning member is opposite to the first recess, and the first tuning member can move to an adjusted position closer to or away from the first recess; the second tuning component includes a second tuning member, the second tuning member is located inside the resonance chamber, the second tuning member is opposite to the side wall of the dielectric resonator, and the second tuning member can move to an adjusted position closer to or away from the side wall of the dielectric resonator.

[0023] In one embodiment, the first tuning component further includes 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 disposed through the top of the housing, the first adjusting nut is connected to the first adjusting screw, and the first adjusting screw is located outside the housing;

[0024] The second tuning component also includes 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. The second adjusting screw is located outside the shell.

[0025] In one embodiment, the first tuning component is a tuning disk, a tuning rod or a tuning block; and / or the second tuning component is a tuning disk, a tuning rod or a tuning block.

[0026] In one embodiment, the housing includes a main body and a cover plate. An opening is formed on the top of the main body. The cover plate is covered at the opening of the main body and encloses the main body to form a resonance chamber.

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

[0028] The above-mentioned multi-mode dielectric resonator and filter, since a first tuning component is installed on the top of the shell, when the first tuning component moves the adjustment position toward or away from the first recess, it can achieve the adjustment of one frequency mode; in addition, a second tuning component is installed on the side of the shell, when the second tuning component moves the adjustment position toward or away from the side wall of the dielectric resonator, it can achieve the adjustment of another frequency mode, that is, multiple resonant frequencies can be generated in one resonant cavity, and the product miniaturization can be achieved; in addition, a first recessed portion recessed toward the insulating seat is formed on the top of the dielectric resonator, which can not only make the above-mentioned at least two different frequency modes close to each other, thereby improving product performance, but also can adjust the unnecessary frequency mode to be away from the passband of the filter, thereby playing a role in reducing insertion loss and improving suppression. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is an exploded structural diagram of the multi-mode dielectric resonator according to the first embodiment of the present application.

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

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

[0032] Figure 4 for Figure 1 Cross-sectional structural diagram of the structure shown.

[0033] Figure 5 It is a cross-sectional structural diagram of a multi-mode dielectric resonator according to the second embodiment of the present application.

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

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

[0036] 10. Shell; 101. Resonant chamber; 11. Main body; 12. Cover; 13. Frequency adjustment structure; 131. Protrusion; 20. Insulating seat; 21. Third recess; 30. Dielectric resonator; 31. First recess; 311. Adjustment hole; 32. Second recess; 33. Surrounding edge; 40. First tuning component; 41. First tuning part; 42. First adjustment screw; 43. First adjustment nut; 50. Second tuning component; 51. Second tuning part; 52. Second adjustment screw; 53. Second adjustment nut; 60. Fastener; 61. Fastening screw; 62. Fastening nut. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0038] See also Figures 1 to 4 An embodiment of the present application provides a multimode dielectric resonator, which includes: a housing 10, an insulating seat 20, a dielectric resonator 30, a first tuning component 40 and a second tuning component 50.

[0039] The housing 10 is formed with a resonance chamber 101 .

[0040] Optionally, the housing 10 includes a main body 11 and a cover plate 12. An opening is formed at the top of the main body 11, and the cover plate 12 is disposed on the opening of the main body 11 and encloses the main body 11 to form a resonant chamber 101.

[0041] The insulating seat 20 is located inside the resonant chamber 101 and connected to the bottom of the resonant chamber 101 .

[0042] The insulating seat 20 can improve the Q value and reduce the insertion loss by using insulating materials. Optionally, the insulating seat 20 includes but is not limited to being made of aluminum oxide material.

[0043] The insulating seat 20 is disposed at the center of the resonant chamber 101, and plays a supporting and insulating role for the dielectric resonator 30, so that the dielectric resonator 30 is away from the bottom wall of the resonant chamber 101 to prevent contact with the housing 10. After the insulating seat 20 is fixedly mounted on the bottom wall of the housing 10, the dielectric resonator 30 is fixedly mounted on the insulating seat 20 by, for example, bonding.

[0044] The dielectric resonator 30 generates a resonant mode at a specific frequency, has the characteristics of high Q value, miniaturization, low loss, etc., and is widely used in the fields of wireless communication, radar, electronic countermeasures, 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 to 45. The dielectric resonator 30 is a rectangular parallelepiped structure, and the length and width of the rectangular parallelepiped structure are not required to be equal, and can be flexibly adjusted and set according to each frequency mode.

[0046] The dielectric resonator 30 is located inside the resonance chamber 101 and connected to the insulating base 20 . A first recess 31 is formed on the top of the dielectric resonator 30 and is recessed toward the insulating base 20 .

[0047] Optionally, the projection profile of the first recess 31 on the top surface of the dielectric resonator 30 in a direction perpendicular to the top surface of the dielectric resonator 30 includes but is not limited to a rectangle, a circle, an ellipse, a triangle, a pentagon, a hexagon or other regular and irregular shapes, which can be flexibly adjusted and set according to actual needs and are not limited here.

[0048] The first tuning component 40 is installed on the top of the housing 10. The first tuning component 40 can move the adjustment position toward or away from the first recess 31, so as to play a tuning role. Specifically, the first tuning component 40 includes a first tuning member 41. The first tuning member 41 is located inside the resonance chamber 101. The first tuning member 41 is opposite to the first recess 31. The first tuning member 41 can move the adjustment position toward or away from the first recess 31. Optionally, the first tuning member 41 includes but is not limited to a tuning disk, a tuning rod or a tuning block.

[0049] The second tuning component 50 is installed on the side of the housing 10, and the second tuning component 50 can move and adjust its position toward or away from the side wall of the dielectric resonator 30, so as to play a tuning role. Specifically, the second tuning component 50 includes a second tuning member 51, and the second tuning member 51 is located inside the resonance chamber 101, and the second tuning member 51 is opposite to the side wall of the dielectric resonator 30, and the second tuning member 51 can move and adjust its position toward or away from the side wall of the dielectric resonator 30. Optionally, the second tuning member 51 includes but is not limited to a tuning disk, a tuning rod or a tuning block.

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

[0051] Since a first tuning component 40 is installed on the top of the housing 10, the first tuning member 41 is opposite to the first recess 31, and when the first tuning member 41 is moved to an adjustment position close to or away from the first recess 31, one frequency mode can be adjusted; in addition, a second tuning component 50 is installed on the side of the housing 10, and the second tuning member 51 is opposite to the side wall of the dielectric resonator 30. When the second tuning member is moved to an adjustment position close to or away from the side wall of the dielectric resonator 30, another frequency mode can be adjusted, that is, multiple resonant frequencies can be generated in one resonant chamber 101, thereby realizing product miniaturization; in addition, a first recess 31 is formed on the top of the dielectric resonator 30 and is recessed toward the insulating seat 20, which can not only make the above-mentioned at least two different frequency modes close to each other, thereby improving product performance, but also can adjust the unnecessary frequency mode to be away from the passband of the filter, thereby playing a role in reducing insertion loss and improving suppression.

[0052] The frequency mode adjusted by the first tuning component 40 is set to the first frequency mode, and the frequency mode adjusted by the second tuning component 50 is set to the second frequency mode. The frequency of the first frequency mode is lower than the frequency of the second frequency mode.

[0053] Optionally, the structures of the first tuning component 41 and the second tuning component 51 are independently set according to actual needs, for example, both are set as tuning disks. The tuning disk is a dielectric resonance disk made of dielectric materials such as ceramics or quartz. The specific dielectric material used is the same 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 component 40 drives the first tuning component 41 to move the adjustment position close to the first recess 31, the frequency of the first frequency mode can be gradually changed from high to low. In addition, when the second tuning component 50 drives the second tuning component 51 to move the adjustment 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 component 41 and the second tuning component 51 can also each adopt a metal rod or a metal block to achieve the tuning effect.

[0055] In some embodiments, the opening size of the first recess 31 is relatively large, for example, greater than or equal to the outer diameter size of the first tuning component 41. In this way, under the adjustment of the first tuning component 40, the first tuning component 41 can move toward the dielectric resonator 30 to enter the first recess 31, and can also move away from the dielectric resonator 30 to move out of the first recess 31. Of course, as some optional solutions, the opening size of the first recess 31 can also be smaller than the outer diameter size of the first tuning component 41, so that the first tuning component 41 will not be able to enter the first recess 31.

[0056] See also Figures 1 to 4 In one embodiment, two second tuning components 50 are provided, and the two second tuning components 50 are respectively installed on two adjacent side surfaces of the housing 10, and the movement directions of the two second tuning components 50 are set at an angle. Specifically, when the second resonant member of the second tuning component 50 is a tuning disk, the disk surfaces of the two tuning disks are set at an angle. In this way, the two second tuning components 50 respectively realize the adjustment of two different frequency modes, and the frequency magnitudes of the frequency modes corresponding to the adjustment of the two second tuning components 50 are different. In addition, it can be known from simulation experiments that the first tuning component 40 and the two second tuning components 50 can be used to adjust the first three frequency modes of the dielectric resonator 30 respectively.

[0057] The frequency modes adjusted by the two second tuning components 50 are set to 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 resonance chamber 101, the frequency of the second frequency mode is the second lowest frequency in the resonance chamber 101, and the frequency of the third frequency mode is the third lowest frequency in the resonance chamber 101.

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

[0059] Optionally, the angle between the disk surfaces of the two tuning disks includes but is not limited to 45°, 60°, 75°, 90°, 105°, 120° or 135°, etc. Specifically, two adjacent side surfaces of the housing 10 in this embodiment are perpendicular to each other, and the disk surfaces of the two tuning disks are perpendicular to each other.

[0060] Of course, in some optional solutions, the second tuning component 50 can also be set to one, three, four or other numbers, which are not limited here and can be flexibly adjusted and set according to actual needs.

[0061] See also Figure 2 and Figure 4In one embodiment, an adjustment hole 311 is formed on the periphery of the bottom wall of the first recess 31. The adjustment hole 311 includes but is not limited to a blind hole or a through hole. Thus, through the analysis of the simulation diagram, it can be seen that the adjustment hole 311 opened on the bottom wall of the first recess 31 has an adjustment effect on the frequencies of the first three frequency modes, so that the first three frequency modes can all reach the frequency band passband of the filter, thereby effectively utilizing them.

[0062] The number of the adjustment holes 311 can be set to one or at least two, and they are arranged in sequence along the outer circumference of the first recess 31. In this way, when the number of the adjustment holes 311 is increased, so that the number of the adjustment holes 311 is more than one, for example, at least two, specifically two, three, four, five or six, etc., it can be seen from the analysis of the simulation diagram that a better adjustment effect can be achieved, and the first three frequency modes can all reach the frequency band passband of the filter, so as to be effectively utilized.

[0063] In a specific embodiment, there are four adjustment holes 311, which are respectively arranged at the four corners of the bottom wall of the first recess 31. In this way, a better adjustment effect can be achieved on the first three frequency modes, so that the frequency gaps of the first three frequency modes are small and close to each other, thereby improving product performance.

[0064] See also Figure 4 and Figure 5 , Figure 5 Compared to Figure 4 The main difference of the structure shown is that the bottom of the dielectric resonator 30 is formed with a second recess 32 which is recessed in a 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 peripheral edge 33, and the peripheral edge 33 cooperates with the bottom surface of the dielectric resonator 30 to form the second recess 32. In this way, the first three frequency modes can be changed, and the frequency of each frequency mode can be adjusted, so that the frequency gap between the three frequency modes is small and close to each other, thereby improving product performance. Of course, the bottom surface of the dielectric resonator 30 can also be as follows Figure 4 Planar form shown in the structure shown.

[0065] Among them, see Figure 5 The depth S of the second concave portion 32 is adjustable, that is, the height of the surrounding edge 33 is adjustable. Specifically, by adjusting the depth S of the second concave portion 32, the frequencies of the second frequency mode and the third frequency mode can be adjusted accordingly.

[0066] In some embodiments, the projection profile of the second recess 32 on the top surface of the dielectric resonator 30 in a direction perpendicular to the top surface of the dielectric resonator 30 includes but is not limited to a rectangle, a circle, an ellipse, a triangle, a pentagon, a hexagon or other regular and irregular shapes, which can be flexibly adjusted and set according to actual needs and are not limited here.

[0067] See also Figure 6 and Figure 7 In one embodiment, a frequency adjustment structure 13 is provided on the bottom wall of the housing 10. The frequency adjustment structure 13 is located inside the resonance chamber 101 and below the dielectric resonator 30. In a direction perpendicular to the bottom wall of the housing 10, the frequency adjustment structure 13 is arranged relative to the outer periphery of the dielectric resonator 30. Specifically, the frequency adjustment structure 13 is arranged relative 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 above embodiments, the material of the frequency adjustment structure 13 includes but is not limited to dielectric materials such as ceramics or quartz.

[0069] See also Figure 6 In one embodiment, the frequency adjustment structure 13 includes a plurality of protrusions 131 disposed on the bottom wall of the housing 10, and the plurality of protrusions 131 are sequentially spaced around the circumference of the insulating seat 20. Thus, by adjusting the size of the protrusions 131, such as adjusting the height of the protrusions 131 and the outer peripheral 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] The protrusion 131 is, for example, a cylinder, and the axial cross-section of the cylinder includes, but is not limited to, a circle, an ellipse or a polygon, etc. The polygon is, for example, a triangle, a quadrilateral, a pentagon or a hexagon, etc. In addition, the protrusion 131 can also be set to a structure in the form of an arc convex hull, etc.

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

[0072] Of course, as an optional solution, the protrusion 131 can also be set to be one, which can also play a role in adjusting the frequencies of the second frequency mode and the third frequency mode.

[0073] It should be noted that the "protrusion 131" can be "a part of the shell 10", that is, the "protrusion 131" and the "other parts of the shell 10" are manufactured as one piece; it can also be an independent component separable from the "other parts of the shell 10", that is, the "protrusion 131" can be manufactured independently and then combined with the "other parts of the shell 10" into a whole.

[0074] In one embodiment, the frequency adjustment structure 13 includes a plurality of adjustment members disposed on the bottom wall of the housing 10. The plurality of adjustment members are arranged in a spaced relationship around the circumference of the insulating seat 20, and the position of the adjustment members is adjustable in a direction perpendicular to the bottom wall of the housing 10. Thus, by adjusting the outer diameter of the adjustment member and the length thereof extending into the resonant chamber 101, the frequency of the second frequency mode and the third frequency mode can be adjusted, so that the frequency of the second frequency mode and the third frequency mode is closer to the frequency of the first frequency mode.

[0075] Specifically, the adjusting member includes but is not limited to an adjusting screw, and a threaded hole adapted to the adjusting screw is provided on the bottom wall of the housing 10. Thus, by rotating the adjusting member, the length of the member extending into the resonance chamber 101 can be adjusted steplessly.

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

[0077] Of course, as an optional solution, the adjustment element can also be set to be one, which can also adjust the frequencies of the second frequency mode and the third frequency mode.

[0078] See also Figure 7 In one embodiment, the frequency adjustment structure 13 includes a first boss disposed on the bottom wall of the housing 10. The first boss is arranged circumferentially around the insulating seat 20. In this way, by adjusting the size of the first boss, such as adjusting the height of the first boss and the wall thickness 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 adjustment structure 13 includes a second boss. The second boss is connected to the top of the first boss, and the second boss is arranged circumferentially around the insulating seat 20. In this way, by arranging the second boss on the top of the first boss, and adjusting the height of the second boss and the wall thickness of the second boss, 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] The wall thickness of the first boss and the wall thickness of the second boss each refer to the distance between one side wall surface facing the insulating seat 20 and the other side wall surface away from the insulating seat 20. Optionally, the wall thickness of the first boss is greater than the wall thickness of the second boss. In this way, the combined structure of the first boss and the second boss is stepped.

[0081] It should be noted that the "first boss" can be "a part of the housing 10", that is, the "first boss" is integrally formed with the "other parts of the housing 10"; it can also be an independent component that can be separated from the "other parts of the housing 10", that is, the "first boss" can be independently manufactured and then combined with the "other parts of the housing 10" into a whole. In addition, the "second boss" can be "a part of the first boss", that is, the "second boss" is integrally formed with the "other parts of the first boss"; it can also be an independent component that can be separated from the "other parts of the first boss", that is, the "second boss" can be independently manufactured and then combined with the "other parts of the first boss" into a whole.

[0082] See also Figure 6 and Figure 7 In some embodiments, the multimode dielectric resonator further includes a fastener 60. The insulating seat 20 is fixedly mounted on the bottom wall of the housing 10 by the fastener 60.

[0083] In one embodiment, the insulating seat 20 is formed with a third recess 21, and the multimode dielectric resonator further includes a fastener 60. The fastener 60 includes a fastening screw 61 and a fastening nut 62 adapted to the fastening screw 61, the fastening nut 62 is located in the third recess 21, and the fastening screw 61 passes through the bottom wall of the housing 10 and the insulating seat 20 in sequence and is connected to the fastening nut 62. In this way, on the one hand, the insulating seat 20 can be stably mounted and fixed on the bottom wall of the housing 10 through the fastening screw 61 and the fastening nut 62, which is convenient for disassembly and assembly operations; 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 include but are not limited to metal parts, which have high structural strength and can stably mount the insulating seat 20 on the bottom wall of the housing 10. In addition, they can withstand high temperatures, have a long service life, and are not easily damaged.

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

[0086] See also Figure 3 and Figure 4 In one embodiment, the first tuning component 40 further includes 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 disposed through the top of the housing 10, the first adjusting nut 43 is connected to the first adjusting screw 42, and the first adjusting screw 42 is located outside the housing 10.

[0087] In addition, the second tuning assembly 50 further includes 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 through the side wall of the housing 10, the second adjusting nut 53 is connected to the second adjusting screw 52, ​​and the second adjusting screw 52 is located outside the housing 10.

[0088] In some embodiments, the first adjusting screw 42 and the second adjusting screw 52 are both made of insulating materials, for example, so as to reduce the adverse effects on various frequency modes of the dielectric resonator 30, thereby improving product performance.

[0089] In addition, the connection method between the first adjusting screw 42 and the first tuning member 41 and the connection method between the second adjusting screw 52 and the second adjusting disk include but are not limited to connecting by insulating adhesive or connecting and fixing by snapping, which can be flexibly adjusted and set according to actual needs and are not limited here.

[0090] In one embodiment, another embodiment of the present application provides a filter, the filter comprising the multimode dielectric resonator of any of the above embodiments. Optionally, the filter can be, for example, a simplexer, a duplexer, a splitter, a combiner, or a tower-mounted amplifier, etc., which is not limited here.

[0091] The filter described above has a first tuning component 40 installed on the top of the housing 10. When the first tuning component 40 is moved to an adjustment position close to or away from the first recess 31, one frequency mode can be adjusted. In addition, a second tuning component 50 is installed on the side of the housing 10. When the second tuning component 50 is moved to an adjustment position close to or away from the side wall of the dielectric resonator 30, another frequency mode can be adjusted, that is, multiple resonant frequencies can be generated in one resonant chamber 101, thereby achieving product miniaturization. In addition, a first recess 31 is formed on the top of the dielectric resonator 30 and is recessed toward the insulating seat 20, which can not only make the above-mentioned at least two different frequency modes close to each other, thereby improving product performance, but also can adjust the unnecessary frequency mode to be away from the passband of the filter, thereby reducing insertion loss and improving suppression.

[0092] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0093] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0094] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0095] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0096] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0097] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A multimode dielectric resonator, characterized in that: The multimode dielectric resonator comprises: a housing, the housing forming a resonant chamber; An insulating seat, the insulating seat is located inside the resonant chamber and connected to the bottom of the resonant chamber; A dielectric resonator, the dielectric resonator is located inside the resonant cavity and connected to the insulating seat, and a first recessed portion is formed on the top of the dielectric resonator and is recessed toward the insulating seat; A first tuning component, the first tuning component is installed on the top of the housing, and the first tuning component can be moved to an adjustable position close to or away from the first recess; and The second tuning component is installed on the side of the housing, and the second tuning component can be moved to an adjustable position close to or away from the side wall of the dielectric resonator.

2. The multimode dielectric resonator according to claim 1, characterized in that: There are two second tuning components, and the two second tuning components are respectively installed on two adjacent side surfaces of the housing, and the movement directions of the two second tuning components are arranged at an angle.

3. The multimode dielectric resonator according to claim 1, characterized in that: An adjustment hole is formed on the outer periphery of the bottom wall of the first recess.

4. The multimode dielectric resonator according to claim 3, characterized in that: The number of the adjustment holes is at least two and they are sequentially spaced apart along the outer circumference of the first recess.

5. The multimode dielectric resonator according to claim 4, characterized in that: There are four adjustment holes, which are respectively arranged at four corners of the bottom wall of the first recess.

6. The multimode dielectric resonator according to claim 1, characterized in that: A second recessed portion is formed at the bottom of the dielectric resonator and is arranged toward a direction close to the top surface of the dielectric resonator. The insulating seat extends into the interior of the second recessed portion.

7. The multimode dielectric resonator according to claim 1, characterized in that: A frequency adjustment structure is provided on the bottom wall of the shell, and the frequency adjustment structure is located inside the resonance chamber and below the dielectric resonator; in a direction perpendicular to the bottom wall of the shell, the frequency adjustment structure is arranged relative to the peripheral position of the dielectric resonator.

8. The multimode dielectric resonator according to claim 7, characterized in that: The frequency adjustment structure includes a plurality of protrusions arranged on the bottom wall of the housing, and the plurality of protrusions are sequentially spaced around the circumference of the insulating seat.

9. The multimode dielectric resonator according to claim 7, characterized in that: The frequency adjustment structure comprises a plurality of adjustment members arranged on the bottom wall of the housing, the plurality of adjustment members are arranged in sequence and spaced apart around the circumference of the insulating seat, and the position of the adjustment members is adjustable along a direction perpendicular to the bottom wall of the housing.

10. The multimode dielectric resonator according to claim 7, characterized in that: The frequency adjustment structure includes a first boss disposed on the bottom wall of the housing, and the first boss is arranged circumferentially around the insulating seat.

11. The multimode dielectric resonator according to claim 10, characterized in that: The frequency adjustment structure includes 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 seat.

12. The multimode dielectric resonator according to claim 1, characterized in that: The insulating seat is formed with a third recess, and the multi-mode dielectric resonator also includes a fastener, which includes a fastening screw and a fastening nut arranged to adapt to the fastening screw, and the fastening nut is located in the third recess. The fastening screw passes through the bottom wall of the shell and the insulating seat in sequence and is connected to the fastening nut.

13. The multimode dielectric resonator according to claim 1, characterized in that: The insulating seat is formed with a third recess, and an operating hole is provided on the bottom wall of the first recess and is arranged opposite to the third recess. The multi-mode dielectric resonator also includes a fastener, which can pass through the operating hole and penetrate the insulating seat and the bottom wall of the shell so that the insulating seat is fixedly connected to the bottom wall of the shell, and the head of the fastener is located inside the third recess.

14. The multimode dielectric resonator according to claim 1, characterized in that: The first tuning component includes a first tuning member, the first tuning member is located inside the resonant chamber, the first tuning member is opposite to the first recess, and the first tuning member can move toward or away from the first recess to adjust the position; The second tuning component includes a second tuning element, the second tuning element is located inside the resonance chamber, the second tuning element is opposite to the side wall of the dielectric resonator, and the second tuning element can move to an adjusted position close to or away from the side wall of the dielectric resonator.

15. The multimode dielectric resonator according to claim 14, characterized in that: The first tuning component further includes 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 housing, the first adjusting nut is connected to the first adjusting screw, and the first adjusting screw is located outside the housing; The second tuning component also includes 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. The second adjusting screw is located outside the shell.

16. The multimode dielectric resonator according to claim 14, characterized in that: The first tuning component is a tuning disk, a tuning rod or a tuning block; and / or the second tuning component is a tuning disk, a tuning rod or a tuning block.

17. The multimode dielectric resonator according to claim 1, characterized in that: The housing comprises a main body and a cover plate. An opening is formed on the top of the main body. The cover plate is arranged on the opening of the main body and is enclosed with the main body to form a resonance chamber.

18. A filter, characterized in that: The filter comprises the multimode dielectric resonator according to any one of claims 1 to 17.

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