A cavity filter tuning method and tuning device

Abstract

The application provides a cavity filter tuning method and a tuning device, and belongs to the technical fields of microwave communication and filter. The cavity filter tuning method comprises the following steps: preparing a cavity filter; applying a spinning pressure to a region of a cover corresponding to a resonator assembly in a direction towards the resonator assembly, so that the region of the cover corresponding to the resonator assembly plastically deforms in a direction towards the resonator assembly to form a plastic deformation region, and the distance between the plastic deformation region and the resonator assembly reaches a preset distance. The tuning device comprises a loading disc, a first power part and at least one loading ram. The loading ram is connected with the loading disc and deviates from the central axis of the loading disc. The first power part is connected with the loading disc to rotate the loading disc along the central axis of the loading disc, and then the loading ram rotates to press against the cover to form the plastic deformation region. The method and device aim to solve the technical problem of repeated iteration and complexity in tuning in the prior art.

Description

Technical Field

[0001] This application belongs to the fields of microwave communication technology and filter technology, and particularly relates to a cavity filter tuning method and tuning device. Background Technology

[0002] Resonators and filters are frequency-selective devices that selectively accept desired signals while suppressing unwanted and interfering signals. The performance of filters significantly impacts the entire communication system and is a crucial component in modern microwave and millimeter-wave communication systems. Resonators and cavity filters have a wide range of applications. Compared to other types of resonators and filters, they are robust, stable, small, have a moderate Q-value (loss / input power), and good heat dissipation, making them suitable for higher power and frequency applications. However, resonators and cavity filters are highly sensitive to manufacturing tolerances, requiring individual performance testing and adjustments during final assembly to achieve pre-designed electrical performance specifications.

[0003] Traditional cavity filters use a tuning screw screwed into the center of the top cover. The resonant frequency of the filter is adjusted by moving the screw in and out. The disadvantages of this traditional tuning method are that it requires repeated iterations, too many tuning screws will increase the weight and cost of the filter, it requires a long time for manual or mechanical adjustment, it lacks theoretical guidance, and it requires tuners with extensive experience. Summary of the Invention

[0004] The purpose of this application is to provide a cavity filter tuning method and tuning device, which aims to solve the technical problems of repeated iteration and cumbersome tuning in the prior art.

[0005] The first objective of this application is to provide a cavity filter tuning method for tuning a cavity filter, the cavity filter including a housing, a cover, and a resonator assembly, the housing having a resonant cavity, the resonator assembly being located within the resonant cavity, and the cavity filter tuning method comprising:

[0006] Prepare the cavity filter: The cover is made of a material capable of plastic deformation, and the cover is connected to the opening of the outer shell and spaced apart from the resonator assembly;

[0007] Applying force to the cover: Applying a spinning force toward the resonator assembly to the area of ​​the cover corresponding to the resonator assembly, so that the area of ​​the cover corresponding to the resonator assembly undergoes plastic deformation toward the resonator assembly, thereby forming a plastic deformation area, and making the distance between the plastic deformation area and the resonator assembly reach a preset distance.

[0008] Furthermore, in the step of applying force to the cover, the shape and deformation depth of the plastic deformation region are simulated and set by a simulation device so that the plastic deformation of the plastic deformation region has a set pattern.

[0009] Furthermore, in the step of applying a spin force toward the resonator assembly to the region of the cover corresponding to the resonator assembly, the spin force is applied to the region of the cover corresponding to the resonator assembly via a cavity filter tuning device, wherein the cavity filter tuning device includes a loading disk and at least one loading head connected to the loading disk and used to press against the cover.

[0010] Furthermore, the step of applying the spin force to the region of the cover corresponding to the resonator assembly via the cavity filter tuning device includes applying a resisting force and a rotational force toward the cover to the loading disk, so that the loading head applies the spin force toward the cover, and rotating the loading disk about an axis perpendicular to the cover to drive the loading head to circumferential motion, or to drive the loading head to rotate and circumferential motion, thereby causing the cover to form the plastic deformation region.

[0011] Furthermore, a plurality of loading heads are connected to one side of the loading disk, and the plurality of loading heads are located on the same circumference. In the step of rotating the loading disk around an axis perpendicular to the cover, the rotation axis of the loading disk coincides with the central axis corresponding to the plurality of loading heads.

[0012] The advantages of this application over the prior art are as follows: Compared with the prior art, the deformation of the cover manufactured by this cavity filter tuning method is "plastic deformation," that is, permanent deformation that will not rebound. After the spinning force is removed, the deformation of the cover can still be retained, making tuning more convenient, eliminating the need for repeated adjustments, saving time. Moreover, the force applied to the cover is spinning force, and the plastic deformation of the cover is generated gradually and uniformly along the circumference under the action of spinning force, resulting in good forming effect. Furthermore, the accuracy is not easily changed after tuning by this method, and the accuracy retention is better compared to the easily loosened tuning screw adjustment. In addition, this cavity filter tuning method eliminates the need for traditional tuning screws in the structural design, which can effectively reduce the height of the filter, the thickness and weight of the cover, thereby reducing material costs and facilitating the miniaturization and weight reduction of the product.

[0013] The second objective of this application is to provide a cavity filter tuning device for tuning a cavity filter, wherein the cavity filter includes at least a cover, and the cavity filter tuning device includes a loading disk, a first power unit, and at least one loading head; the loading head is connected to the loading disk and protrudes from one side of the loading disk, the loading head being offset from the central axis of the loading disk; the first power unit is connected to the loading disk to cause the loading disk to rotate along the central axis of the loading disk, thereby causing the loading head to rotate and press against the cover to form a plastic deformation region.

[0014] Furthermore, the loading head is a column, which protrudes from and is connected to the loading disk and extends in a direction away from the loading disk, and the central axis of the column is perpendicular to the surface of the loading disk.

[0015] Furthermore, the loading head is rotatably connected to the loading disk, and the loading head is capable of rotating about its own central axis.

[0016] Furthermore, the cavity filter tuning device also includes a second power unit, which is connected to the loading head to drive the loading head to rotate around its own central axis.

[0017] Furthermore, the end face of the extension end of the loading head is spherical, or the extension end of the loading head is connected to a sphere, and the sphere is rotatably connected to the loading head.

[0018] The advantages of this application over the prior art are as follows: The tuning process of this tuning device is convenient, and the deformation of the cover is "plastic deformation," that is, permanent deformation that will not rebound. After the spinning force is removed, the deformation of the cover can still be retained, making tuning more convenient and eliminating the need for repeated adjustments, thus saving time. Moreover, the force applied to the cover by this device is spinning force, and the plastic deformation of the cover is generated gradually and uniformly along the circumference under the action of spinning force, resulting in good forming effect. Furthermore, the accuracy after tuning is not easily changed, and the accuracy is better maintained compared to the tuning screw adjustment which is prone to loosening. In addition, after the tuning device completes the tuning work, it will detach from the tuned cavity filter and can be used to tune other cavity filters without being connected to the cavity filter. This tuning device can effectively reduce the height of the filter, the thickness and weight of the cover, thereby reducing material costs and facilitating the miniaturization and weight reduction of the product. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a cavity filter provided in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the structure of a cavity filter tuning device acting on the cavity filter according to an embodiment of this application;

[0022] Figure 3 yes Figure 2 Schematic diagram of the extension end of the loading head in the middle Figure 1 ;

[0023] Figure 4 yes Figure 2 Schematic diagram of the extended end of the loading head in the middle Figure 2 ;

[0024] Figure 5 The curve showing the relationship between deformation depth and tuning frequency during the tuning process of the cavity filter tuning method and device provided in this embodiment is shown.

[0025] Explanation of reference numerals in the attached drawings: 1. First power unit; 2. Second power unit; 3. Loading disk; 4. Loading head; 401. Spherical surface; 402. Sphere; 5. Cover; 501. Plastic deformation region; 502. Lower surface of plastic deformation region; 6. Outer shell; 7. Resonator assembly; 701. Upper end face of resonator rod. Detailed Implementation

[0026] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0027] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "upward", "vertical", "horizontal", "bottom", "inner", "outer", "inner side", "outer side", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0028] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.

[0031] Please see Figure 1 and Figure 2As shown, the first objective of this application embodiment is to provide a cavity filter tuning method for tuning a cavity filter. The cavity filter structure to which this tuning method is applicable includes a housing 6, a cover 5, and a resonator assembly 7. The housing 6 has a resonant cavity, and the resonator assembly 7 is located within the resonant cavity. The cover 5 is flat and made of a material capable of plastic deformation. The cover 5 can be made of a metal with good ductility. The cover 5 is connected to the opening of the housing 6 and spaced apart from the resonator assembly 7. The resonator assembly 7 is generally a resonant column or resonant rod. In this application, the resonator assembly 7 includes several resonant rods, each with an upper end face. The upper end face 701 of the resonant rod is parallel and spaced apart from the lower surface of the cover 5. Specifically, there is a gap between the lower surface of the cover 5 and the upper end face 701 of the resonant rod. The cavity filter tuning method includes: S1, preparing the cavity filter: taking... The cover 5 is made of a material capable of plastic deformation. The cover 5 is connected to the opening of the outer shell 6 and spaced apart from the resonator assembly 7. S2, Apply force to the cover 5: Apply a spinning force towards the resonator assembly 7 to the area of ​​the cover 5 corresponding to the resonator assembly 7, so that the area of ​​the cover 5 corresponding to the resonator assembly 7 undergoes plastic deformation towards the resonator assembly 7 to form a plastic deformation area 501. The distance between the plastic deformation area 501 and the resonator assembly 7 reaches a preset distance. It should be noted that before applying force to the cover 5, the upper surface of the cover 5 and the resonator assembly 7 are kept parallel. Applying force to the cover 5 causes the local area of ​​the cover corresponding to the resonator assembly 7 to form a plastic deformation area 501. The plastic deformation area 501 and the upper surface of the resonator assembly 7 are still kept parallel, realizing the parallel and precise adjustment of the distance between the part of the cover 5 and the upper surface of the resonator assembly 7. Specifically, by applying a spinning force to the cover 5, the area of ​​the cover 5 corresponding to the resonant rod undergoes plastic deformation in the direction of the resonant rod. After plastic deformation, the cover 5 forms a plastic deformation area 501. The distance between the lower surface 502 of the plastic deformation area of ​​the cover 5 and the upper end surface 701 of the resonant rod is reduced to a preset distance, thereby changing the capacitance value between the cover 5 and the upper end surface 701 of the resonant rod, thus achieving the purpose of adjusting the resonant frequency.

[0032] It should be noted that, from a physical perspective, the deformation of the cover 5 manufactured in this application is a "plastic deformation," that is, a permanent deformation that does not spring back. After the spinning force is removed, the deformation of the cover 5 can still be retained. Moreover, the force applied to the cover 5 is a spinning force, and the plastic deformation of the cover 5 is generated gradually and uniformly along the circumference under the action of the spinning force, resulting in a good forming effect. In contrast, the deformation of the cover 5 in the prior art is all "elastic deformation." For example, in the prior art, the cover 5 undergoes elastic deformation by screwing in and out. The cover 5 will spring back as the screw moves up and down. When the screw is removed, the deformation of the cover 5 will partially or completely disappear. In addition, during use, the screw may loosen, which can easily cause the cover 5 to deform. After the cover 5 deforms, the distance between the cover 5 and the upper end face 701 of the resonant rod changes, causing the capacitance between them to change, thereby affecting the tuning accuracy.

[0033] In this embodiment, the spinning force is mainly used to cause plastic deformation of the area of ​​the cover 5 corresponding to the resonator assembly 7. Before adjustment, the cover 5 is parallel to the upper end face 701 of the resonator rod. After adjustment, the cover 5 above the resonator rod moves towards the resonator rod. The distance moved can be calculated by simulation equipment. After adjustment, a plastic deformation area 501 is formed on the cover 5, and the plastic deformation area 501 remains parallel to the upper end face 701 of the resonator rod. The spinning force can be provided by any motion mechanism or device (first power unit 1) that provides translation, rotation, or lifting. Specifically, the spinning force can be provided by a motor and transmitted to the loading disk 3 through a screw mechanism. After the loading disk 3 is connected to the motion mechanism, it rotates and lifts, so that the loading head 4 can perform loading and unloading motion on the cover 5 while following the rotation of the loading disk 3, causing it to undergo regular spinning deformation to form the plastic deformation area 501; see reference. Figure 5 As shown, Figure 5 The curve showing the relationship between deformation depth and tuning frequency during the tuning process when using this cavity filter method makes tuning more accurate and reliable.

[0034] The beneficial effects of this embodiment are as follows: Compared with the prior art, the deformation of the cover 5 manufactured by this cavity filter tuning method is "plastic deformation", that is, permanent deformation that will not rebound. After the spinning force is removed, the deformation of the cover 5 can still be retained, making tuning more convenient, eliminating the need for repeated adjustments, saving time. Moreover, the force applied to the cover 5 is spinning force, and the plastic deformation of the cover 5 is generated gradually and uniformly along the circumference under the action of spinning force, resulting in good forming effect. Furthermore, the accuracy after tuning is not easily changed, and the accuracy is better maintained compared with the tuning screw adjustment which is prone to loosening. In addition, this cavity filter tuning method eliminates the need for traditional tuning screws in the structural design, which can effectively reduce the height of the filter, the thickness and weight of the cover 5, thereby reducing material costs and facilitating the miniaturization and weight reduction of the product.

[0035] In one embodiment, during the step of applying force to the cover 5, the shape and deformation depth of the plastic deformation region 501 are simulated and set by a simulation device so that the plastic deformation of the plastic deformation region 501 has a set pattern.

[0036] In this embodiment, the plastic deformation of the cover 5 is controllable in shape and depth, and various loading and unloading parameter values ​​required can be predicted through preliminary design and simulation. The shape and deformation depth of the plastic deformation region 501 are simulated and set by simulation equipment so that the plastic deformation of the plastic deformation region 501 has a set pattern. The loading parameter values ​​are determined, including the magnitude, direction and time of the rotational force, etc. This tuning method can be guided by highly accurate guidance values ​​provided by software simulation to guide the actual tuning process. This tuning method can be guided by theoretical simulation and has good predictability.

[0037] In one embodiment, the step of applying a spinning force toward the resonator assembly 7 to the region of the cover 5 corresponding to the resonator assembly 7 includes applying the spinning force to the region of the cover 5 corresponding to the resonator assembly 7 through a cavity filter tuning device, wherein the cavity filter tuning device includes a loading disk 3 and at least one loading head 4 connected to the loading disk 3 and used to press against the cover 5; the step of applying the spinning force to the region of the cover 5 corresponding to the resonator assembly 7 through the cavity filter tuning device includes applying a pressing force and a rotational force toward the cover 5 to the loading disk 3, so that the loading head 4 applies a spinning force toward the cover 5, and rotating the loading disk 3 about an axis perpendicular to the cover 5 to drive the loading head 4 to circumferential motion, or to drive the loading head 4 to rotate and circumferential motion, thereby causing the cover 5 to form a plastic deformation region 501.

[0038] In this embodiment, the device for applying rotational pressure to the cover 5 is a cavity filter tuning device. This device includes a loading disk 3 and a loading head 4. The loading disk 3 is the power input end. The loading disk 3 can be connected to any motion mechanism or device capable of providing translation, rotation, or lifting (collectively referred to as the first power unit 1). The first power unit 1 drives the loading disk 3 to rotate along its own central axis and moves the loading disk 3 toward the cover 5, thereby causing the loading head 4 to press against the cover 5 and spin-form a plastic deformation region 501. In specific use, the loading disk 3 drives the loading head 4 to rotate while simultaneously lowering it to apply pressure to the cover 5. With a single loading head 4, it rotates at least once (with two loading heads 4, it only needs to rotate at least half a turn, and so on). After this, the loading disk 3 rises to end one tuning cycle. The loading disk 3 can then translate to repeat the above operation for tuning the next cavity filter. This tuning method offers a convenient tuning process, and the deformation of the cover 5 is a "plastic deformation," meaning a permanent deformation that will not spring back. Even after the spin pressure is removed, the deformation of the cover 5 is still retained, making tuning more convenient and eliminating the need for repeated adjustments, saving time. Furthermore, the accuracy after tuning is less likely to change, offering better accuracy retention compared to tuning screw adjustments that are prone to loosening. In addition, after completing the tuning process, the tuning device detaches from the tuned cavity filter, allowing it to tune other cavity filters without being connected to them. This tuning method effectively reduces the height of the filter, the thickness of the cover 5, and its weight, thereby reducing material costs and facilitating product miniaturization and weight reduction.

[0039] In one embodiment, a plurality of loading heads 4 are connected to one side of the loading disk 3. The plurality of loading heads 4 are located on the same circumference. In the step of rotating the loading disk 3 around an axis perpendicular to the cover 5, the rotation axis of the loading disk 3 coincides with the central axis corresponding to the plurality of loading heads 4.

[0040] In this embodiment, the loading disk 3 is flat. During use, the loading disk 3 rotates along its own central axis, and multiple loading heads 4 are arranged around the central axis on the same circumference. When the loading disk 3 rotates, the loading heads 4 press against the cover 5 to form a consistent circular plastic deformation area 501. Using multiple loading heads 4 can reduce the rotation angle of the loading disk 3. The minimum rotation angle of the loading disk 3 is (360° / number of loading heads 4), thereby reducing the pressing time and improving work efficiency.

[0041] Please see Figure 1 and Figure 2As shown, the second objective of this application embodiment is to provide a cavity filter tuning device for tuning a cavity filter. The cavity filter includes at least a cover 5, which is flat. The cavity filter also includes a housing 6 and a resonator assembly 7. The housing 6 has a resonant cavity, and the resonator assembly 7 is located inside the resonant cavity. For details on the specific structure of the cavity filter, please refer to the description of the cavity filter structure in the cavity filter tuning method described above, which will not be repeated here. This cavity filter tuning device includes a loading disk 3, a first power unit 1, and at least one loading head 4. The loading head 4 is connected to the loading disk 3 and protrudes from one side of the loading disk 3, offset from the central axis of the loading disk 3. The first power unit 1 is connected to the loading disk 3 to make the loading disk 3 rotate along the central axis of the loading disk 3, thereby causing the loading head 4 to rotate and press against the cover 5 to form a plastic deformation region 501.

[0042] In this embodiment, the cavity filter tuning device is mainly used to apply a spinning force towards the resonator assembly 7 to the area of ​​the cover 5 corresponding to the resonator assembly 7. The loading head 4 applies force to the local contact area of ​​the cover 5, causing plastic deformation in the area of ​​the cover 5 corresponding to the resonator assembly 7 towards the resonator assembly 7, thus forming a plastic deformation region 501. Furthermore, the force applied to the cover 5 is a spinning force, and the plastic deformation of the cover 5 is gradually and uniformly generated along the circumference under the action of the spinning force, resulting in good forming effect and a large plastic deformation region 501. Domain 501 is limited to a very small neighborhood of the contact area, ensuring that the distance between the plastic deformation region 501 and the resonator assembly 7 reaches a preset distance. This allows for a small external force to be applied, enabling the cover 5 to partially and permanently move downwards towards the resonator assembly 7, thereby changing the capacitance between the cover 5 and the upper end face 701 of the resonant rod, thus adjusting the resonant frequency. This tuning device minimizes the rebound of the cover 5, maintains good shape, and makes the capacitance between the cover 5 and the upper end face 701 of the resonant rod more stable. (Refer to...) Figure 5 As shown, Figure 5 When using this cavity filter method and device, the relationship curve between deformation depth and tuning frequency during the tuning process is shown, making the tuning more accurate and reliable.

[0043] Specifically, in use, the loading disk 3 serves as the power input end. The loading disk 3 is connected to the first power unit 1, which can provide any motion mechanism or device for rotation or lifting. The first power unit 1 drives the loading disk 3 to rotate along its own central axis and moves the loading disk 3 toward the cover 5, thereby causing the loading head 4 to press against the cover 5 and spin-form a plastic deformation region 501. In specific use, the loading disk 3 drives the loading head 4 to rotate while simultaneously lowering it to apply pressure to the cover 5. With a single loading head 4, it rotates at least one revolution (with two loading heads 4, it only needs to rotate at least half a revolution, and so on). After this, the loading disk 3 rises to end one tuning cycle. The loading disk 3 can then move horizontally to repeat the above operation for tuning the next cavity filter. This tuning device offers a convenient tuning process, and the deformation it creates in the cover 5 is a "plastic deformation," meaning a permanent deformation that will not spring back. Even after the spin pressure is removed, the deformation of the cover 5 is retained, making tuning more convenient and eliminating the need for repeated adjustments, saving time. Furthermore, the accuracy after tuning is less prone to change, offering better accuracy retention compared to tuning screws that are prone to loosening. Additionally, after completing the tuning process, the device detaches from the tuned cavity filter, allowing it to tune other cavity filters without being connected to them. This tuning device effectively reduces the height of the filter, the thickness of the cover 5, and its weight, thereby reducing material costs and facilitating product miniaturization and weight reduction.

[0044] In addition, the first power unit 1 can also drive the loading disk 3 to achieve translation. After the tuning device completes the tuning of one cavity filter, the first power unit 1 can drive the loading disk to move above the next cavity filter and repeat the tuning process to achieve the tuning of the next cavity filter. The cavity filters to be tuned are tuned in this order, which can realize automation and improve work efficiency.

[0045] It is important to emphasize that the mechanism consisting of the loading disk 3 and the loading head 4 in this tuning device is only used during tuning. After tuning is complete, this mechanism no longer works in conjunction with the cavity filter; that is, only the cavity filter itself is used after tuning. In contrast, in existing technologies, the tuning mechanism and the cavity are combined into a single unit, and the cavity filter and the tuning mechanism still work together after tuning. Compared to existing technologies, this tuning device allows the cavity filter to be used independently after successful tuning, while existing technologies require the cavity filter to be used together with the tuning mechanism after successful tuning. Therefore, this tuning device has the advantages of being lightweight, having a simple structure, and being low in cost.

[0046] In one embodiment, the loading head 4 is a column, which protrudes from and connects to the loading disk 3 and extends in a direction away from the loading disk 3. The central axis of the column is perpendicular to the surface of the loading disk 3. Specifically, the column can be a cylindrical or conical column. One end of the column that connects to the loading disk 3 is the connecting end, and the other end that extends outward is the extension end. When the column is conical, the diameter of the extension end is less than the diameter of the connecting end.

[0047] In this embodiment, the loading head 4 is a column, with its central axis perpendicular to the loading disk 3. When applying a rotating force perpendicular to the cover 5 to the loading disk 3, using a column makes it easier to ensure that the pressure applied by the column to the cover 5 is perpendicular to the surface of the cover 5, resulting in a more uniform force distribution on the cover 5 and ensuring the shape of the plastic deformation region 501. The column structure is also simpler to design and easier to manufacture.

[0048] In one embodiment, the loading head 4 is rotatably connected to the loading disk 3, and the loading head 4 is able to rotate about its own central axis.

[0049] In this embodiment, the connecting end of the loading head 4 can be equipped with a bearing connected to the loading disk 3, making the rotation of the loading head 4 more flexible. Designing the loading head 4 as a self-rotating structure can reduce the sliding friction between the loading head 4 and the surface of the cover 5 during the circumferential rotation driven by the loading disk 3, which is beneficial to making the rotation of the loading head 4 smoother.

[0050] In one embodiment, the cavity filter tuning device further includes a second power unit 2, which is connected to the loading head 4 to drive the loading head 4 to rotate around its own central axis, thereby controlling the rotation of the loading head 4 through the second power unit 2.

[0051] In this embodiment, to make the movement of the loading head 4 around the central axis of the loading disk 3 independent of the rotation of the loading head 4, a second power unit 2, which operates independently of the first power unit 1, is added. The second power unit 2 is connected to the loading head 4 to drive the loading head 4 to rotate around its own central axis. This design enables multiple operating modes of the device, making it more widely applicable and adaptable.

[0052] In one embodiment, refer to Figure 3 or Figure 4 As shown, the end face of the extension end of the loading head 4 is a spherical surface 401, or the extension end of the loading head 4 is connected to a ball 402, and the ball 402 is rotatably connected to the loading head 4.

[0053] In this embodiment, the end face of the extension end of the loading head 4 is the position that contacts the cover 5. In principle, the end face of the extension end of the loading head 4 can be of various geometric shapes. In order to reduce the friction between this end face and the surface of the cover 5, and to improve the appearance and aesthetics of the plastic deformation region 501, the end face of the extension end of the loading head 4 is designed as a spherical surface 401 or directly rotated and connected to a sphere 402, so that the connection between the cover 5 and the plastic deformation region 501 can be smoothly transitioned and the pressing is smoother. In addition, the use of a sphere 402 can also convert sliding friction into rolling friction, which helps to reduce the friction between the loading head 4 and the cover 5, making the rotational pressing smoother.

[0054] In one embodiment, at least two loading heads 4 are provided; the two or more loading heads 4 are arranged at circular intervals with the central axis of the loading disk 3 as the center.

[0055] In this embodiment, by increasing the number of loading heads 4, it is beneficial to reduce the rotation angle of the loading disk 3. When two or more loading heads 4 are evenly distributed along a circular interval with the central axis of the loading disk 3 as the center, the minimum rotation angle of the loading disk 3 is (360° / number of loading heads 4), thereby reducing the overall pressing time of the device and improving work efficiency.

[0056] Alternatively, two or more loading heads 4 are located on circles of different diameters with the center of the loading disk 3 as the center; the extended ends of the two or more loading heads 4 are all located on the same plane perpendicular to the central axis of the loading disk 3. During pressing, the loading heads 4 are all in contact with the surface of the cover 5 so that the loading heads 4 can press and rotate on the cover 5 to form plastic deformation regions 501 of different diameters. In addition, multiple loading heads 4 simultaneously apply pressure and rotation force to the cover 5, which is beneficial to the rapid forming of the plastic deformation region 501 and improves the flatness of the plastic deformation region 501.

[0057] Alternatively, the extended ends of two or more loading heads 4 may not be simultaneously located on the same plane perpendicular to the central axis of the loading disk 3. That is, when the loading disk 3 is placed parallel to the cover 5, the end faces of the extended ends of the loading heads 4 may be spaced at different distances from the upper surface of the cover 5. The loading heads 4 may be designed with an adjustable height relative to the loading disk 3. Therefore, a suitable loading head 4 may be selected for use as needed, while avoiding the influence of an unsuitable loading head 4. The above design can enhance the applicability of this device.

[0058] The above description is merely a preferred embodiment of this application, and only specifically describes the technical principles of this application. These descriptions are only for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this interpretation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, as well as other specific embodiments of this application that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of this application.

Claims

1. A cavity filter tuning method for tuning a cavity filter, the cavity filter comprising a housing, a cover, and a resonator assembly, the housing having a resonant cavity, the resonator assembly being located within the resonant cavity, characterized in that, The cavity filter tuning method includes: Prepare the cavity filter: The cover is made of a material capable of plastic deformation, and the cover is connected to the opening of the outer shell and spaced apart from the resonator assembly; Applying force to the cover: Applying a spinning force towards the resonator assembly to the area of ​​the cover corresponding to the resonator assembly, causing plastic deformation of the area of ​​the cover corresponding to the resonator assembly towards the resonator assembly, forming a plastic deformation region, and making the distance between the plastic deformation region and the resonator assembly reach a preset distance; applying the spinning force to the area of ​​the cover corresponding to the resonator assembly through a cavity filter tuning device, wherein the cavity filter tuning device includes a loading disk and at least one loading head connected to the loading disk and used to press against the cover; the loading head protrudes from one side of the loading disk, the loading head is columnar, and the central axis of the loading head is perpendicular to the surface of the loading disk; the loading disk is rotatable along the central axis of the loading disk, thereby causing the loading head to rotate and press against the cover to form the plastic deformation region, causing the plastic deformation region to move downward parallel towards the resonator assembly.

2. The cavity filter tuning method as described in claim 1, characterized in that, In the step of applying force to the cover, the shape and deformation depth of the plastic deformation region are simulated and set by a simulation device so that the plastic deformation of the plastic deformation region has a set pattern.

3. The cavity filter tuning method as described in claim 1, characterized in that, The step of applying the spin force to the region of the cover corresponding to the resonator assembly via the cavity filter tuning device includes applying a resisting force and a rotational force toward the cover to the loading disk, so that the loading head applies the spin force toward the cover, and rotating the loading disk about an axis perpendicular to the cover to drive the loading head to circumferential motion, or to drive the loading head to rotate and circumferential motion, thereby causing the cover to form the plastic deformation region.

4. The cavity filter tuning method as described in claim 3, characterized in that, A plurality of loading heads are connected to one side of the loading disk, and the plurality of loading heads are located on the same circumference. In the step of rotating the loading disk around an axis perpendicular to the cover, the rotation axis of the loading disk coincides with the central axis corresponding to the plurality of loading heads.

5. A cavity filter tuning device for tuning a cavity filter, wherein the cavity filter includes at least a cover, characterized in that, The cavity filter tuning device includes a loading disk, a first power unit, and at least one loading head. The loading head is connected to the loading disk and protrudes from one side of the loading disk. The loading head is columnar, with its central axis perpendicular to the surface of the loading disk and offset from the central axis of the loading disk. The first power unit is connected to the loading disk to rotate the loading disk along its central axis, thereby causing the loading head to rotate and press against the cover to form a plastic deformation region, which then moves parallel downward toward the resonator assembly.

6. The cavity filter tuning device as described in claim 5, characterized in that, The loading head is a column that protrudes from and is connected to the loading disk and extends away from the loading disk. The central axis of the column is perpendicular to the surface of the loading disk.

7. The cavity filter tuning device as described in claim 6, characterized in that, The loading head is rotatably connected to the loading disk, and the loading head can rotate about its own central axis.

8. The cavity filter tuning device as described in claim 7, characterized in that, The cavity filter tuning device further includes a second power unit, which is connected to the loading head to drive the loading head to rotate around its own central axis.

9. A cavity filter tuning device as described in any one of claims 6-8, characterized in that, The end face of the extension end of the loading head is spherical; or the extension end of the loading head is connected to a sphere, and the sphere is rotatably connected to the loading head.

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