Cavity filter and cover plate assembly thereof and communication equipment

Abstract

The present invention provides a cavity filter and its cover plate assembly and a communication device including the cavity filter. The cavity filter includes a cavity, a cover plate assembly and an input / output component. The cover plate assembly includes a cover plate body and a resonance tube integrally connected to the cover plate body. The cover plate assembly seals the cavity by welding or screwing to form a resonance cavity. The input / output component extends into the resonance cavity through the cavity and / or the cover plate body and is capacitively coupled or inductively coupled to the resonance tube. The cavity filter and its cover plate assembly provided by the present invention and the communication device including the cavity filter can reduce the structural components in the resonance cavity and optimize the radio frequency regulation by connecting the resonance tube and the cover plate body to form a cover plate assembly.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a cavity filter and a cover plate assembly thereof, and a communication device comprising the cavity filter. Background Art

[0002] In a base station system of mobile communication, a communication signal carrying communication data within a specific frequency range is usually transmitted through a transmitting antenna, and a communication signal is received through a receiving antenna. The signal received by the receiving antenna includes not only the communication signal carrying communication data within the above-mentioned specific frequency range, but also many clutter or interference signals outside the above-mentioned specific frequency range. To obtain the communication signal carrying communication data within the specific frequency range transmitted by the transmitting antenna from the signal received by the receiving antenna, it is usually necessary to filter the signal received by the receiving antenna through a cavity filter to filter out clutter or interference signals outside the specific frequency of the communication signal carrying communication data.

[0003] Cavity filters are widely used as a frequency selective device. Figure 1 As shown, in the prior art, the cavity filter generally includes a cavity 11, a cover plate 12, a resonant tube 13 and a tuning screw 14, wherein the cover plate 12 covers the cavity 11 to form a resonant cavity, the resonant tube 13 is fixed to the bottom of the cavity 11 by screws, and the tuning screw 14 extends into the resonant tube 13 through the cover plate 12 to adjust the RF parameters. There are many structural parts in the resonant cavity, which are easy to affect the RF parameters. In addition to the resonant tube 13, the resonant cavity also includes screws for fixing the resonant tube 13. The cavity 11 needs to be designed with an assembly table with threaded holes and the tuning screw 14 must be used for RF adjustment. Summary of the invention

[0004] The present invention provides a cavity filter and a cover plate assembly thereof, and a communication device comprising the cavity filter, so as to solve the technical problem in the prior art that a large number of structural parts in a resonant cavity easily affect radio frequency parameters.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: providing a cover plate assembly of a cavity filter, the cover plate assembly comprising a cover plate body and a resonance tube, and the resonance tube is integrally connected to the cover plate body.

[0006] According to an embodiment of the present invention, a deformation zone is provided on the cover plate body, and the deformation zone is used to receive an adjustment force to adjust the position state of the resonance tube relative to the cover plate body.

[0007] According to an embodiment of the present invention, the deformation zone is a region on the cover plate body surrounding the periphery of the resonance tube.

[0008] According to an embodiment of the present invention, the material thickness of the deformation zone is smaller than the material thickness of the cover plate body.

[0009] According to an embodiment of the present invention, the deformation zone is in the shape of a single-circle groove or a multi-circle groove.

[0010] According to an embodiment of the present invention, the resonance tube includes an annular wall and a bottom wall, the top end of the annular wall is connected to the cover plate body, and the bottom end of the annular wall is connected to the bottom wall.

[0011] According to an embodiment of the present invention, the material thickness of the deformation zone is 0.3-0.5 mm.

[0012] According to an embodiment of the present invention, the annular wall is further connected with a flying rod.

[0013] In order to solve the above technical problems, another technical solution adopted by the present invention is: to provide a cavity filter, the cavity filter comprising:

[0014] Cavity;

[0015] The aforementioned cover plate assembly, wherein the cover plate assembly seals the cavity by welding or screwing to form a resonant cavity;

[0016] An input / output component extends into the resonance cavity through the cavity and / or the cover body and is capacitively coupled or inductively coupled to the resonance tube.

[0017] To solve the above technical problems, another technical solution adopted by the present invention is: to provide a communication device, wherein the communication device includes the aforementioned cavity filter, and the communication device is at least one of a duplexer, a simplexer, a splitter, a combiner or a tower top amplifier.

[0018] The beneficial effect of the present invention is that, different from the prior art, the cavity filter and its cover plate assembly provided by the present invention and the communication device including the cavity filter can reduce the structural parts in the resonant cavity and optimize the RF regulation by connecting the resonant tube and the cover plate into a cover plate assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0020] Figure 1 It is a schematic diagram of the cross-sectional structure of a common cavity filter in the prior art;

[0021] Figure 2 is a schematic diagram of a partial cross-sectional structure of a cavity filter provided in the first embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of a partial cross-sectional structure of a cavity filter provided in the first embodiment of the present invention;

[0023] Figure 4 is a schematic diagram of a partial cross-sectional structure of a cavity filter provided in a second embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of a partial cross-sectional structure of a cavity filter provided in a third embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of a partial cross-sectional structure of a cavity filter provided in a fourth embodiment of the present invention;

[0026] Figure 7 is a schematic structural diagram of a component of a cavity filter provided in a fourth embodiment of the present invention;

[0027] Figure 8 is a schematic diagram of a partial cross-sectional structure of a cavity filter provided in a fifth embodiment of the present invention;

[0028] Fig. 9 is a schematic cross-sectional structural diagram of a cavity filter provided in a sixth embodiment of the present invention;

[0029] Fig.10 is a schematic diagram of the three-dimensional structure of a cavity filter provided by a seventh embodiment of the present invention;

[0030] Fig.11 It is a structural schematic diagram of debugging the cavity filter provided by the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] Please also read Figure 2 and Figure 3 An embodiment of the present invention provides a cover plate assembly 110 , which includes a cover plate body 111 and a resonance tube 112 , wherein the resonance tube 112 is integrally connected to the cover plate body 111 .

[0035] The cover body 111 is provided with a deformation zone 113, which is used to receive the push and pull action of the adjustment force to adjust the position of the resonance tube 112 relative to the cover body 111 and thus adjust the RF parameters. The deformation zone 113 is the area surrounding the resonance tube 112 on the cover body 111. The material thickness of the deformation zone 113 is less than the material thickness of the cover body 111. The deformation zone 113 is in the shape of a single circle groove (see Figure 2 ) or in the form of multiple grooves (see Figure 3 In a specific embodiment, the thickness of the deformation zone 113 may be 0.3-0.5 mm.

[0036] The resonance tube 112 includes an annular wall 114 and a bottom wall 115. The top end of the annular wall 114 is connected to the cover body 111, and the bottom end of the annular wall 114 is connected to the bottom wall 115. The annular wall 114 may be further coupled to a flying rod.

[0037] Please continue reading Figure 2 and Figure 3 The embodiment of the present invention further provides a cavity filter, which includes a cavity 120, the aforementioned cover plate assembly 110, and an input / output component (not shown).

[0038] The cover plate assembly 110 covers the cavity 120 by welding or screwing to form a resonant cavity 125 .

[0039] See also Figure 4The embodiment of the present invention further provides a cover plate assembly 210, which includes a cover plate body 211 and a resonance tube 212, wherein the resonance tube 212 is riveted to the cover plate body 211. The cover plate body 211 is provided with a connection hole 222, and the resonance tube 212 extends from the lower surface of the cover plate body 211 through the connection hole 222 and is riveted to the upper surface of the cover plate body 211.

[0040] The cover body 211 is provided with a deformation zone 213, which is used to receive the push-pull action of the adjustment force to adjust the position of the resonance tube 212 relative to the cover body 211 and thus adjust the radio frequency parameters. The deformation zone 213 is an area on the cover body 211 surrounding the resonance tube 212. The material thickness of the deformation zone 213 is less than the material thickness of the cover body 211. The deformation zone 213 is in the shape of a single-circle groove or a multi-circle groove.

[0041] The resonance tube 212 includes an annular wall 214 and a bottom wall 215. The bottom end of the annular wall 214 is connected to the bottom wall 215. The top end of the annular wall 214 is provided with a limiting platform 217, a penetration portion 218 and a riveting edge 219 which are connected in sequence. The limiting platform 217 is in abutment with the lower surface of the cover body 211. The penetration portion 218 penetrates the connecting hole 222. The riveting edge 219 is arranged opposite to the limiting platform 217 and is riveted to the upper surface of the cover body 211. The bottom wall 215 is further extended with a flange portion 216. The annular wall 214 can be further coupled with a flying rod.

[0042] Please continue reading Figure 4 The embodiment of the present invention further provides a cavity filter, which includes a cavity 220, the aforementioned cover plate assembly 210, and an input / output component (not shown).

[0043] The cover plate assembly 210 covers the cavity 220 by welding or screwing to form a resonant cavity 225 .

[0044] See also Figure 5 The embodiment of the present invention further provides a cover plate assembly 310, which includes a cover plate body 311 and a resonance tube 312, and the resonance tube 312 is connected to the cover plate body 311. The cover plate body 311 is provided with a connection hole 319, and the resonance tube 312 extends from the lower surface of the cover plate body 311 into the connection hole 319 and is threaded, crimped or welded to the connection hole 319. The three connection schemes can be used separately, or welding process can be added on the basis of the threaded connection or crimping connection scheme to improve the connection manufacturability.

[0045] The cover body 311 is provided with a deformation zone 313, which is used to receive the push-pull action of the adjustment force to adjust the position of the resonance tube 312 relative to the cover body 311 and thus adjust the radio frequency parameters. The deformation zone 313 is an area on the cover body 311 surrounding the resonance tube 312. The material thickness of the deformation zone 313 is less than the material thickness of the cover body 311. The deformation zone 313 is in the shape of a single-circle groove or a multi-circle groove.

[0046] The resonance tube 312 includes an annular wall 314 and a bottom wall 315. The bottom end of the annular wall 314 is connected to the bottom wall 315. When the crimping connection scheme is adopted, the top of the annular wall 314 is sequentially extended with an engaging groove 317 and an introduction platform 318. The outer diameter of the annular wall 314 is greater than the diameter of the connecting hole 319, the outer diameter of the engaging groove 317 is smaller than the diameter of the connecting hole 319, the diameter of the introduction platform 318 is between the outer diameter of the annular wall 314 and the outer diameter of the engaging groove 317, the introduction platform 318 can be interference fit with the connecting hole 319, and the outer periphery of the introduction platform 318 can be provided with a knurled surface or a gear surface to increase the connection stability. The resonance tube 312 and the cover plate body 311 are tightly matched by extrusion. When the resonance tube 312 and the cover plate body 311 are extruded, part of the material of the cover plate body 311 is extruded and deformed and embedded in the engaging groove 317. The bottom wall 315 is further extended with a flange portion 316. The annular wall 314 can be further coupled with the flying rod.

[0047] Please continue reading Figure 5 The embodiment of the present invention further provides a cavity filter, which includes a cavity 320, the aforementioned cover plate assembly 310, and an input / output component (not shown).

[0048] The cover plate assembly 310 covers the cavity 320 by welding or screwing to form a resonant cavity 325 .

[0049] Please also read Figure 6 and Figure 7 In this embodiment, a cover assembly 410 is provided. The cover assembly 410 includes a cover body 411 and a resonance tube 412. A connecting tube 417 is provided on the lower surface of the cover body 411. The resonance tube 412 is connected to the connecting tube 417. Specifically, riveting, clamping, welding, threaded connection and other connection methods can be adopted.

[0050] The upper surface of the cover body 411 is provided with a recessed assembly cavity 418, and the cover assembly 410 also includes an elastic sheet 431 and an adjusting screw 432 spirally connected to the elastic sheet 431. The assembly cavity 418 can be a closed assembly cavity, and the assembly cavity 418 can be provided with an avoidance notch to facilitate the elastic sheet 431 to be aligned and installed in the assembly cavity 418. After the elastic sheet 431 is installed in the assembly cavity 418, it can be rotated a certain angle to prevent it from being disengaged and limitedly assembled in the assembly cavity 418. The adjusting screw 432 is used to abut the area of ​​the cover body 411 provided with the connecting tube 417 to adjust the position of the resonant tube 412 relative to the cover body 411 as a whole, thereby adjusting the RF parameters. It can be understood that since the resonant tube 412 moves up and down as a whole during the adjustment process, the resonant tube 412 itself does not deform, and the effect of maintaining the consistency of the filter parameters can be achieved.

[0051] Of course, this embodiment can also adopt the adjustment method in the above-mentioned embodiment, that is, a deformation zone is provided on the cover body 411, and the deformation zone is used to receive the push-pull action of the adjustment force to adjust the position state of the resonance tube 412 relative to the cover body 411 and then adjust the RF parameters. The deformation zone is the area on the cover body 411 surrounding the resonance tube 412. The material thickness of the deformation zone is less than the material thickness of the cover body 411. The deformation zone is in the shape of a single-circle groove or a multi-circle groove.

[0052] The resonance tube 412 includes an annular wall 414 and a bottom wall 415. The top end of the annular wall 414 is connected to the connecting tube 417, and the bottom end of the annular wall 414 is connected to the bottom wall 415. The bottom wall 415 is further extended with a flange portion 416. The annular wall 414 can be further coupled to a flying rod.

[0053] like Figure 7 As shown, the elastic sheet 431 includes a disc body 433, a threaded sleeve 434 disposed in the central area of ​​the disc body 433, a plurality of bent protrusions 435 disposed in the edge area of ​​the disc body 433, and a plurality of through holes 436 disposed between the threaded sleeve 434 and the bent protrusions 435. The threaded sleeve 434 is used to screw the adjusting screw 432, the bent protrusions 435 make the elastic sheet 431 as a whole have a certain elasticity, and the through holes 436 can appropriately reduce the material.

[0054] Please continue reading Figure 6 and Figure 7 The embodiment of the present invention further provides a cavity filter, which includes a cavity 420, the aforementioned cover plate assembly 410, and an input / output component (not shown).

[0055] The cover plate assembly 410 covers the cavity 420 by welding or screwing to form a resonant cavity 425 .

[0056] See also Figure 8The embodiment of the present invention further provides a cover plate assembly 510 , which includes a cover plate body 511 and a resonance tube 512 , wherein the resonance tube 512 is connected to the cover plate body 511 .

[0057] The cover body 511 is provided with a deformation zone 513, which is used to receive the push-pull action of the adjustment force to adjust the position of the resonance tube 512 relative to the cover body 511 and thus adjust the radio frequency parameters. The deformation zone 513 is an area on the cover body 511 surrounding the resonance tube 512. The material thickness of the deformation zone 513 is less than the material thickness of the cover body 511. The deformation zone 513 is in the shape of a single-circle groove or a multi-circle groove.

[0058] The resonance tube 512 includes an annular wall 514 and a bottom wall 515. The top end of the annular wall 514 is connected to the cover body 511, and the bottom end of the annular wall 514 is connected to the bottom wall 515. The bottom wall 515 is further extended with a flange portion 516. The annular wall 514 is further connected with a flying rod 517.

[0059] Please continue reading Figure 8 The embodiment of the present invention further provides a cavity filter, which includes a cavity 520, the aforementioned cover plate assembly 510, and an input / output component (not shown).

[0060] A partition 521 is provided in the cavity 520 , and a slot 522 for avoiding the flying rod 517 is provided in the partition 521 ; the cover assembly 510 covers the cavity 520 by welding or screw fixing to form a resonant cavity 525 .

[0061] In other embodiments, the flying rod 517 may also be suspended in the slot 522 through an insulating member and capacitively coupled to the resonance tube 512 .

[0062] See also Fig. 9 The embodiment of the present invention further provides a cover plate assembly 710 , which includes a cover plate body 711 and a resonance tube 712 , wherein the resonance tube 712 is connected to the cover plate body 711 .

[0063] The cover body 711 is provided with a deformation zone 713, which is used to receive the push-pull action of the adjustment force to adjust the position of the resonance tube 712 relative to the cover body 711 and thus adjust the radio frequency parameters. The deformation zone 713 is an area on the cover body 711 surrounding the resonance tube 712. The material thickness of the deformation zone 713 is less than the material thickness of the cover body 711. The deformation zone 713 is in the shape of a single-circle groove or a multi-circle groove.

[0064] Please continue reading Fig. 9 An embodiment of the present invention further provides a cavity filter, which includes a cavity 720, the aforementioned cover plate assembly 710, a first input / output component 714, and a second input / output component 718.

[0065] The cover assembly 710 covers the cavity 720 by welding or screwing to form a resonant cavity 725; the first input / output member 714 extends into the resonant cavity 725 through the cavity 720 and / or the cover body 710 and is capacitively coupled to the resonant tube 712 through a coupling rod 717, wherein the first input / output member 714 is fixedly assembled by a first insulating member 715 and a second insulating member 716, and the coupling rod 717 can be sleeved on the first input / output member 714 and fixed by clamping the first insulating member 715 and the second insulating member 716. The second input / output member 718 can be a low-pass rod, which is fixed by an assembly tube 721 connected to the cover body 711 and capacitively coupled to the resonant tube 712 through a coupling rod 719.

[0066] In other embodiments, the first input / output element 714 and the second input / output element 718 may also be in contact with the resonance tube 712 to form an inductive coupling connection.

[0067] See also Fig.10 An embodiment of the present invention further provides a cavity filter, which includes a cover plate assembly 910 and a cavity 920.

[0068] The cover assembly 910 includes a cover body 911 and a plurality of resonance tubes 912, and the plurality of resonance tubes 912 are connected to the cover body 911 by various methods in the previous embodiments. A deformation zone 913 is provided on the cover body 911, and the deformation zone 913 is used to receive the push-pull action of the adjustment force to adjust the position state of the resonance tube 912 relative to the cover body 911 and thus adjust the radio frequency parameters. The deformation zone 913 is an area on the cover body 911 surrounding the resonance tube 912. The material thickness of the deformation zone 913 is less than the material thickness of the cover body 911. The deformation zone 913 is in the shape of a single-circle groove or a multi-circle groove. The cover assembly 910 seals the cavity 920 by welding or screw fixing to form a resonance cavity.

[0069] An embodiment of the present invention further provides a communication device, the communication device includes the aforementioned cavity filter, and the communication device is at least one of a duplexer, a simplexer, a splitter, a combiner, or a tower-top amplifier.

[0070] Please also read Fig.10 and Fig.11 The embodiment of the present invention further provides a debugging device, which is used to apply an adjustment force to the aforementioned cover assembly. The debugging device includes a bracket and an adjustment member 960 slidably arranged on the bracket. The adjustment member 960 is used to apply downward pressure or upward pulling force to the cover body or the resonance tube to adjust the position state of the resonance tube relative to the cover body.

[0071] In one embodiment, the adjusting member 930 is a telescopic cylinder, which includes a cylinder body 961 and a cylinder rod 962 telescopically connected to the cylinder body 961. The cylinder body 961 is slidably arranged through a bracket, and the cylinder rod 962 is used to apply an adjusting force to adjust the position of the resonance tube relative to the cover body.

[0072] As mentioned above, the cover body is provided with a deformation zone (eg Fig.10 The deformation zone 913 in the cover plate body (e.g. Fig.10 The cover body 911 in the middle surrounds the resonance tube (eg Fig.10 The deformation zone may be in the shape of a single-circle groove or a multi-circle groove, and the free end of the cylinder rod 962 may be in the shape of a single-circle convex ring or a multi-circle convex ring.

[0073] In one embodiment, in order to facilitate upward adjustment, a lifting member may be provided on the deformation zone, and a pulling member is correspondingly provided at the free end of the cylinder rod 962, and the pulling member cooperates with the lifting member to apply upward adjustment force. The pulling member and the lifting member may be components such as a hanging ring and a hook.

[0074] The resonance tube includes an annular wall and a bottom wall. The top end of the annular wall is connected to the cover body, and the bottom end of the annular wall is connected to the bottom wall. In one embodiment, the cylinder rod 962 can act on the bottom wall to apply a downward pressure regulating force.

[0075] Similarly, in order to facilitate the upward adjustment, a lifting member can be provided on the bottom wall, and a pulling member is correspondingly provided at the free end of the cylinder rod 962, and the pulling member cooperates with the lifting member to apply the upward adjustment force. The pulling member and the lifting member can be parts such as a ring, a hook, etc.

[0076] In one embodiment, the bracket includes a substrate 930 and a slide rail disposed on the substrate 930 , a deformation zone for placing the cavity filter is formed between the slide rail and the substrate 930 , and the adjustment member 960 is disposed on the slide rail.

[0077] Specifically, the slide rail includes a first slide rail 940 disposed on the base plate 930, a second slide rail 950 slidably disposed on the first slide rail 940 in a first direction, and the adjustment member 960 slidably disposed on the second slide rail 950 in a second direction. The first direction and the second direction are perpendicular to each other.

[0078] Among them, the first slide rail 940 includes two pieces arranged in parallel and spaced apart on the base plate 930, the top of the first slide rail 940 is provided with a first slide groove 941 along the first direction, the second slide rail 950 can be in a frame shape, the bottom of the second slide rail 950 is provided with a slider 951 matching the first slide groove 941 along the first direction, the first slide groove 941 and the slider 951 can be a dovetail groove type or T-slot type matching structure, the opposite inner surface of the second slide rail 950 is provided with a second slide groove 952 along the second direction, and the adjusting member 960 is slidably assembled based on the second slide groove 952.

[0079] The adjusting member 960 can be used to apply downward pressure to any deformation zone 913 or to apply upward pulling force by hooking or vacuum adsorption to adjust the RF parameters of the cavity filter. The debugging device provided by the present invention is separated from the cavity filter after adjustment, which can avoid the problem in the prior art that the tuning screw is still assembled on the cover plate after adjustment and is prone to loosening or misoperation affecting the adjusted RF parameters.

[0080] It can be understood that in the above embodiments, when the resonance tube and the cover plate are integrally formed, welded, riveted or crimped, the cylinder rod 962 can act on the bottom of the resonance tube or the deformation zone, depending on the specific situation. When the resonance tube 412 is connected to the cover plate body 411 through the connecting tube 417, the cylinder rod 962 can act on the adjusting screw 432. At this time, the resonance tube 412 moves up and down as a whole, and the resonance tube 412 itself does not deform, which can achieve the effect of maintaining the consistency of the filter parameters.

[0081] In summary, it is easy for those skilled in the art to understand that the cavity filter and its cover plate assembly provided by the present invention and the communication device including the cavity filter can reduce the structural parts in the resonant cavity and optimize the RF regulation by connecting the resonant tube and the cover plate into a cover plate assembly.

[0082] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cover plate assembly of a cavity filter, characterized in that: The cover plate assembly comprises a cover plate body and a resonance tube, wherein the resonance tube is integrally connected to the cover plate body; Wherein, a deformation zone is provided on the cover body, and the deformation zone is in the shape of a single-circle groove or a multi-circle groove; the deformation zone is used to receive the push-pull action of the adjustment force to adjust the position state of the resonance tube relative to the cover body and thus adjust the radio frequency parameters; The cavity filter also includes a debugging device, which includes a bracket and an adjusting member slidably arranged on the bracket, and the adjusting member is used to apply downward pressure or upward pulling force to the cover body or the resonance tube to adjust the position state of the resonance tube relative to the cover body.

2. The cover plate assembly according to claim 1, characterized in that: The deformation zone is a region on the cover plate body surrounding the periphery of the resonance tube.

3. The cover plate assembly according to claim 1, characterized in that: The material thickness of the deformation zone is smaller than the material thickness of the cover plate body.

4. The cover plate assembly according to claim 1, characterized in that: The resonance tube comprises an annular wall and a bottom wall, the top end of the annular wall is connected to the cover plate body, and the bottom end of the annular wall is connected to the bottom wall.

5. The cover plate assembly according to claim 1, characterized in that: The material thickness of the deformation zone is 0.3-0.5 mm.

6. The cover plate assembly according to claim 4, characterized in that: The annular wall is further connected with a flying rod.

7. A cavity filter, characterized in that: The cavity filter comprises: Cavity; The cover plate assembly according to any one of claims 1 to 6, wherein the cover plate assembly covers the cavity by welding or screwing to form a resonant cavity; An input / output component extends into the resonance cavity through the cavity and / or the cover body and is capacitively coupled or inductively coupled to the resonance tube.

8. A communication device, characterized in that: The communication device comprises the cavity filter according to claim 7, and the communication device is at least one of a duplexer, a simplexer, a splitter, a combiner, or a tower-top amplifier.

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