Cavity filter tuning device

Abstract

The application provides a debugging device of a cavity filter, which is used for applying an adjusting force to a cover plate assembly of the cavity filter, the cover plate assembly comprising a cover plate body and a resonant tube connected with the cover plate body, and the debugging device comprising a support and an adjusting piece slidably arranged on the support, the adjusting piece being used for applying a downward pressing force or an upward pulling force to the cover plate body or the resonant tube to adjust a position state of the resonant tube relative to the cover plate body. The debugging device of the cavity filter provided by the application is separated from the cavity filter after adjustment, and thus the problem that a tuning screw is still assembled on the cover plate after adjustment and is prone to loosening or misoperation to affect the adjusted radio frequency parameters can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a kind of debugging device of cavity filter. BACKGROUND

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

[0003] Cavity filters are widely used as a kind of frequency selection device. Figure 1 As shown in the prior art, the cavity filter usually 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 on 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 radio frequency parameters. After adjustment, it is still assembled on the cover plate 12, which is easy to loosen or misoperate to affect the adjusted radio frequency parameters. The resonant cavity has many structure parts, which can easily affect the radio frequency parameters. In addition to the resonant tube 13, the resonant cavity also includes screws for fixing the resonant tube 13, and the cavity 11 needs to be designed with an assembly platform with threaded holes and must use the tuning screw 14 for radio frequency adjustment. SUMMARY

[0004] The present application provides a kind of debugging device of cavity filter, to solve the technical problem that tuning screw in prior art is still assembled on cover plate after adjustment and is easy to loosen or misoperate to affect the adjusted radio frequency parameters.

[0005] To solve the above technical problems, one technical solution adopted by the present application is to provide a kind of debugging device of cavity filter, the debugging device is used to apply adjustment force to the cover plate assembly of the cavity filter, the cover plate assembly includes a cover plate body and a resonant tube connected with the cover plate body, and the debugging device includes a bracket and an adjustment member slidingly arranged on the bracket, the adjustment member is used to apply downward pressure or upward tension to the cover plate body or the resonant tube to adjust the position state of the resonant tube relative to the cover plate body.

[0006] According to an embodiment of the present application, the adjusting member is a telescopic cylinder, the telescopic cylinder comprises a cylinder body and a cylinder rod telescopically connected with the cylinder body, the cylinder body is slidingly arranged through the support, and the cylinder rod is used for applying an adjusting force to adjust the position state of the resonant tube relative to the cover plate body.

[0007] According to an embodiment of the present application, the cover plate body is provided with a deformation zone, the deformation zone is a region of the cover plate body surrounding the periphery of the resonant tube, and the free end of the cylinder rod is in the form of a convex ring.

[0008] According to an embodiment of the present application, the deformation zone is in the form of a single-ring groove or a multi-ring groove, and the free end of the cylinder rod is in the form of a single-ring convex ring or a multi-ring convex ring.

[0009] According to an embodiment of the present application, the deformation zone is provided with a pulling member, and the free end of the cylinder rod is provided with a pulling member, the pulling member and the pulling member are matched to apply the adjusting force.

[0010] According to an embodiment of the present application, the resonant tube comprises a ring wall and a bottom wall, the top end of the ring wall is connected with the cover plate body, the bottom end of the ring wall is connected with the bottom wall, and the cylinder rod acts on the bottom wall to apply the adjusting force.

[0011] According to an embodiment of the present application, the bottom wall is provided with a pulling member, and the free end of the cylinder rod is provided with a pulling member, the pulling member and the pulling member are matched to apply the adjusting force.

[0012] According to an embodiment of the present application, the support comprises a base plate and a sliding rail arranged on the base plate, a deformation zone for placing the cavity filter is formed between the sliding rail and the base plate, and the adjusting member is arranged on the sliding rail.

[0013] According to an embodiment of the present application, the sliding rail comprises a first sliding rail arranged on the base plate, a second sliding rail slidingly arranged on the first sliding rail in a first direction, and the adjusting member is slidingly arranged on the second sliding rail in a second direction.

[0014] According to an embodiment of the present application, the first sliding rails are arranged in parallel and spaced apart on the base plate, the top of the first sliding rail is provided with a first sliding groove in the first direction, the bottom of the second sliding rail is provided with a sliding block matched with the first sliding groove in the first direction, the opposite inner surfaces of the second sliding rail are provided with a second sliding groove in the second direction, and the adjusting member is slidingly assembled based on the second sliding groove.

[0015] The present application has the beneficial effect that, unlike the prior art, the adjusting device of the cavity filter provided by the present application is separated from the cavity filter after adjustment, which can avoid the problem that the tuning screw is still assembled on the cover plate after adjustment and is easy to loosen or misoperate to affect the adjusted radio frequency parameters. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0017] Figure 1 is a cross-sectional structure schematic diagram of a cavity filter commonly used in the prior art;

[0018] Figure 2 is a partial cross-sectional structure schematic diagram of a cavity filter provided by the first embodiment of the present application;

[0019] Figure 3 is a partial cross-sectional structure schematic diagram of a cavity filter provided by the first embodiment of the present application;

[0020] Figure 4 is a partial cross-sectional structure schematic diagram of a cavity filter provided by the second embodiment of the present application;

[0021] Figure 5 is a partial cross-sectional structure schematic diagram of a cavity filter provided by the third embodiment of the present application;

[0022] Figure 6 is a partial cross-sectional structure schematic diagram of a cavity filter provided by the fourth embodiment of the present application;

[0023] Figure 7 is a structure schematic diagram of an assembly of a cavity filter provided by the fourth embodiment of the present application;

[0024] Figure 8 is a partial cross-sectional structure schematic diagram of a cavity filter provided by the fifth embodiment of the present application;

[0025] Figure 9 is a cross-sectional structure schematic diagram of a cavity filter provided by the sixth embodiment of the present application;

[0026] Figure 10 is a three-dimensional structure schematic diagram of a cavity filter provided by the seventh embodiment of the present application;

[0027] Figure 11 is a structure schematic diagram of a cavity filter provided by the present application for debugging. DETAILED DESCRIPTION

[0028] With reference to the drawings and embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0029] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, motion condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0030] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0031] Please refer to Figure 2 and Figure 3 , the embodiments of the present application provide a cover plate assembly 110, which comprises a cover plate body 111 and a resonant tube 112, and the resonant tube 112 is integrally connected with the cover plate body 111.

[0032] The cover plate body 111 is provided with a deformation area 113, which is used to accept the push-pull action of the adjusting force to adjust the position state of the resonant tube 112 relative to the cover plate body 111 and further adjust the radio frequency parameter. The deformation area 113 is a region around the periphery of the resonant tube 112 on the cover plate body 111. The material thickness of the deformation area 113 is less than the material thickness of the cover plate body 111. The deformation area 113 is in the form of a single-ring groove (see Figure 2 ) or in the form of a multi-ring groove (see Figure 3 ). In specific embodiments, the thickness of the deformation area 113 can be 0.3-0.5 millimeters.

[0033] The resonant tube 112 comprises a ring wall 114 and a bottom wall 115, the top end of the ring wall 114 is connected with the cover plate body 111, and the bottom end of the ring wall 114 is connected with the bottom wall 115. The ring wall 114 can be further coupled with a flying rod.

[0034] Please continue to refer toFigure 2 and Figure 3 The embodiment of the present application also provides a cavity filter, which comprises a cavity 120, the aforementioned cover plate assembly 110, and input / output components (not shown in the figure).

[0035] The cover plate assembly 110 covers the cavity 120 by welding or screw fixing to form a resonant cavity 125.

[0036] Please refer to Figure 4 The embodiment of the present application also provides a cover plate assembly 210, which comprises a cover plate body 211 and a resonant tube 212, and the resonant tube 212 is riveted to the cover plate body 211. The cover plate body 211 is provided with a connecting hole 222, and the resonant tube 212 extends out of the connecting hole 222 from the lower surface of the cover plate body 211 and is riveted to the upper surface of the cover plate body 211.

[0037] The cover plate body 211 is provided with a deformation area 213, which is used to accept the push-pull action of an adjusting force to adjust the position state of the resonant tube 212 relative to the cover plate body 211 and further adjust the radio frequency parameter. The deformation area 213 is a region surrounding the periphery of the resonant tube 212 on the cover plate body 211. The material thickness of the deformation area 213 is less than that of the cover plate body 211. The deformation area 213 is in the form of a single-ring groove or a multi-ring groove.

[0038] The resonant tube 212 comprises a ring wall 214 and a bottom wall 215, the bottom end of the ring wall 214 is connected to the bottom wall 215, the top end of the ring wall 214 is provided with a limiting table 217, a through portion 218 and a riveting edge 219 connected in sequence, the limiting table 217 is limited to abut the lower surface of the cover plate body 211, the through portion 218 penetrates the connecting hole 222, and the riveting edge 219 is arranged opposite to the limiting table 217 and is riveted to the upper surface of the cover plate body 211. The bottom wall 215 further extends a flange portion 216. The ring wall 214 can be further coupled with a flying rod.

[0039] Please refer to Figure 4 The embodiment of the present application also provides a cavity filter, which comprises a cavity 220, the aforementioned cover plate assembly 210, and input / output components (not shown in the figure).

[0040] The cover plate assembly 210 covers the cavity 220 by welding or screw fixing to form a resonant cavity 225.

[0041] Please refer to Figure 5The embodiment of the present application further provides a cover plate assembly 310, which comprises a cover plate body 311 and a resonant tube 312 connected with the cover plate body 311. The cover plate body 311 is provided with a connecting hole 319, and the resonant tube 312 extends into the connecting hole 319 from the lower surface of the cover plate body 311 and is threadedly connected, crimped or welded with the connecting hole 319. The three connection schemes can be used independently, or welding process is added on the basis of the threaded connection or crimping connection scheme to improve the connection reliability.

[0042] The cover plate body 311 is provided with a deformation area 313 for accepting the push-pull action of the adjusting force to adjust the position state of the resonant tube 312 relative to the cover plate body 311 and further adjust the radio frequency parameter. The deformation area 313 is a region surrounding the periphery of the resonant tube 312 on the cover plate body 311. The material thickness of the deformation area 313 is less than that of the cover plate body 311. The deformation area 313 is in the form of a single-ring groove or a multi-ring groove.

[0043] The resonant tube 312 comprises a ring wall 314 and a bottom wall 315, the bottom end of the ring wall 314 is connected with the bottom wall 315, when the crimping connection scheme is adopted, the top end of the ring wall 314 is sequentially provided with an embedded groove 317 and a lead-in platform 318, the outer diameter of the ring wall 314 is greater than the diameter of the connecting hole 319, the outer diameter of the embedded groove 317 is less than the diameter of the connecting hole 319, the diameter of the lead-in platform 318 is between the outer diameter of the ring wall 314 and the outer diameter of the embedded groove 317, the lead-in platform 318 can be in interference fit with the connecting hole 319, the outer periphery of the lead-in platform 318 can be provided with a knurled surface or a gear surface to increase the connection stability, the resonant tube 312 is tightly fitted with the cover plate body 311 by extrusion, when the resonant tube 312 is extruded with the cover plate body 311, part of the material of the cover plate body 311 is extruded and deformed and embedded in the embedded groove 317. The bottom wall 315 is further provided with a flange portion 316. The ring wall 314 can be further coupled with a flying rod.

[0044] Please continue to refer to Figure 5 The embodiment of the present application further provides a cavity filter, which comprises a cavity 320, the aforementioned cover plate assembly 310 and input / output members (not shown in the figure).

[0045] The cover plate assembly 310 covers the cavity 320 by welding or screw fixing to form a resonant cavity 325.

[0046] Please refer to Figure 6 and Figure 7 The embodiment of the present application further provides a cover plate assembly 410, which comprises a cover plate body 411 and a resonant tube 412, the lower surface of the cover plate body 411 is provided with a connecting cylinder 417, and the resonant tube 412 is connected with the connecting cylinder 417. The connecting methods such as riveting, clamping, welding and threaded connection can be adopted.

[0047] The upper surface of the cover plate body 411 is provided with a recessed assembly cavity 418. The cover plate assembly 410 also includes an elastic piece 431 and an adjusting screw 432 that is spirally connected to the elastic piece 431. The assembly cavity 418 may be a constricted assembly cavity, and the assembly cavity 418 may have a clearance notch to facilitate the alignment and insertion of the elastic piece 431 into the assembly cavity 418. After the elastic piece 431 is inserted into the assembly cavity 418, it can be rotated at a certain angle to prevent it from falling out and to be fixedly assembled in the assembly cavity 418. The adjusting screw 432 is used to abut against the area of ​​the cover plate body 411 where the connecting cylinder 417 is provided to adjust the position of the resonant tube 412 relative to the cover plate body 411, thereby adjusting the radio frequency 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, which can achieve the effect of maintaining the consistency of filter parameters.

[0048] Of course, this embodiment can also adopt the adjustment method in the aforementioned embodiments, that is, the cover plate body 411 is provided with a deformation area, which is used to receive the pushing and pulling action of the adjustment force to adjust the position of the resonant tube 412 relative to the cover plate body 411, thereby adjusting the radio frequency parameters. The deformation area is the area on the cover plate body 411 surrounding the resonant tube 412. The material thickness of the deformation area is less than the material thickness of the cover plate body 411. The deformation area is in the form of a single-ring groove or multiple-ring grooves.

[0049] The resonant 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 cylinder 417, and the bottom end of the annular wall 414 is connected to the bottom wall 415. The bottom wall 415 further extends to have a flange 416. The annular wall 414 can be further coupled to the fly rod.

[0050] like Figure 7 As shown, the elastic sheet 431 includes a disc body 433, a threaded sleeve 434 located in the central region of the disc body 433, multiple bent protrusions 435 located in the edge region of the disc body 433, and multiple through holes 436 located between the threaded sleeve 434 and the bent protrusions 435. The threaded sleeve 434 is used to screw onto the adjusting screw 432, the bent protrusions 435 give the elastic sheet 431 a certain degree of elasticity, and the through holes 436 can appropriately reduce the amount of material.

[0051] Please continue reading. Figure 6 and Figure 7 The present invention also provides a cavity filter, which includes a cavity 420, the aforementioned cover plate assembly 410, and an input / output component (not shown in the figure).

[0052] The cover plate assembly 410 seals the cavity 420 by welding or screw fixing to form a resonant cavity 425.

[0053] Please see Figure 8The embodiment of the present application further provides a cover plate assembly 510, which comprises a cover plate body 511 and a resonant tube 512 connected with the cover plate body 511.

[0054] The cover plate body 511 is provided with a deformation area 513 for accepting the push-pull action of the adjusting force to adjust the position state of the resonant tube 512 relative to the cover plate body 511 and further adjust the radio frequency parameter. The deformation area 513 is a region surrounding the periphery of the resonant tube 512 on the cover plate body 511. The material thickness of the deformation area 513 is less than that of the cover plate body 511. The deformation area 513 is in the form of a single-ring groove or a multi-ring groove.

[0055] The resonant tube 512 comprises a ring wall 514 and a bottom wall 515, the top end of the ring wall 514 is connected with the cover plate body 511, and the bottom end of the ring wall 514 is connected with the bottom wall 515. The bottom wall 515 is further extended with a flange part 516. The ring wall 514 is further connected with a flying rod 517.

[0056] Please continue to refer to Figure 8 The embodiment of the present application further provides a cavity filter, which comprises a cavity 520, the aforementioned cover plate assembly 510, and input / output members (not shown in the figure).

[0057] The cavity 520 is provided with a partition 521, which is provided with a slot 522 for avoiding the flying rod 517; the cover plate assembly 510 is used to cover the cavity 520 by welding or screw fixing to form a resonant cavity 525.

[0058] In other embodiments, the flying rod 517 can also be suspended in the slot 522 through an insulating member and be connected in a capacitive coupling manner with the resonant tube 512.

[0059] Please refer to Figure 9 The embodiment of the present application further provides a cover plate assembly 710, which comprises a cover plate body 711 and a resonant tube 712 connected with the cover plate body 711.

[0060] The cover plate body 711 is provided with a deformation area 713 for accepting the push-pull action of the adjusting force to adjust the position state of the resonant tube 712 relative to the cover plate body 711 and further adjust the radio frequency parameter. The deformation area 713 is a region surrounding the periphery of the resonant tube 712 on the cover plate body 711. The material thickness of the deformation area 713 is less than that of the cover plate body 711. The deformation area 713 is in the form of a single-ring groove or a multi-ring groove.

[0061] Please continue to refer to Figure 9 The embodiment of the present application further provides a cavity filter, which comprises a cavity 720, the aforementioned cover plate assembly 710, a first input / output member 714, and a second input / output member 718.

[0062] The cover plate assembly 710 covers the cavity 720 to form a resonant cavity 725 by welding or screwing; the first input / output 714 extends into the resonant cavity 725 through the cavity 720 and / or the cover plate body 711 and is connected to the resonant tube 712 by capacitive coupling through the coupling rod 717, wherein the first input / output 714 is fixedly assembled by the first insulating member 715 and the second insulating member 716, and the coupling rod 717 is sleeved on the first input / output 714 and is fixed by the first insulating member 715 and the second insulating member 716. The second input / output 718 can be a low-pass rod, which is fixed by the assembling cylinder 721 connected to the cover plate body 711 and is connected to the resonant tube 712 by capacitive coupling through the coupling rod 719.

[0063] In other embodiments, the first input / output 714 and the second input / output 718 can also be in contact with the resonant tube 712 to form inductive coupling.

[0064] Please refer to Figure 10 The embodiment of the present application also provides a cavity filter, which comprises a cover plate assembly 910 and a cavity 920.

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

[0066] The embodiment of the present application also provides a communication device, which comprises the aforementioned cavity filter and is at least one of a diplexer, a monopole, a splitter, a combiner or a tower top amplifier.

[0067] Please refer to Figure 10 and Figure 11 The embodiment of the present application also provides a debugging device, which is used for applying an adjusting force to the aforementioned cover plate assembly and comprises a bracket and an adjusting member 960 slidably arranged on the bracket, wherein the adjusting member 960 is used for applying a downward pressure or an upward tension to the cover plate body or the resonant tube to adjust the position state of the resonant tube relative to the cover plate body.

[0068] In an embodiment, the adjusting member 930 is a telescopic cylinder, which includes a cylinder body 961 and a cylinder rod 962 telescopically connected with the cylinder body 961. The cylinder body 961 is slidingly arranged by the bracket, and the cylinder rod 962 is used to apply an adjusting force to adjust the position state of the resonant tube relative to the cover plate body.

[0069] As mentioned above, the cover plate body is provided with a deformation zone (for example, the deformation zone 913 in Figure 10 . The deformation zone is a region on the cover plate body (for example, the cover plate body 911 in Figure 10 surrounding the periphery of the resonant tube (for example, the resonant tube 912 in Figure 10 . Correspondingly, the free end of the cylinder rod 962 can be in the form of a convex ring. The deformation zone can be in the form of a single-ring groove or in the form of a multi-ring groove, and correspondingly, the free end of the cylinder rod 962 can be in the form of a single-ring convex ring or in the form of a multi-ring convex ring.

[0070] In an embodiment, in order to facilitate the up-pull adjustment, a lifting member can be arranged on the deformation zone, and the free end of the cylinder rod 962 is correspondingly provided with a pulling member. The pulling member cooperates with the lifting member to apply an up-pull adjusting force. The pulling member and the lifting member can be a lifting ring, a hook or the like.

[0071] The resonant tube includes a ring wall and a bottom wall. The top end of the ring wall is connected with the cover plate body, and the bottom end of the ring wall is connected with the bottom wall. In an embodiment, the cylinder rod 962 can act on the bottom wall to apply a downward pressing adjusting force.

[0072] Similarly, in order to facilitate the up-pull adjustment, a lifting member can be arranged on the bottom wall, and the free end of the cylinder rod 962 is correspondingly provided with a pulling member. The pulling member cooperates with the lifting member to apply an up-pull adjusting force. The pulling member and the lifting member can be a lifting ring, a hook or the like.

[0073] In an embodiment, the bracket includes a base plate 930 and a sliding rail arranged on the base plate 930. The sliding rail and the base plate 930 form a deformation zone for placing the cavity filter. The adjusting member 960 is arranged on the sliding rail.

[0074] Specifically, the sliding rail includes a first sliding rail 940 arranged on the base plate 930, a second sliding rail 950 slidingly arranged on the first sliding rail 940 in a first direction, and the adjusting member 960 slidingly arranged on the second sliding rail 950 in a second direction. The first direction and the second direction are perpendicular to each other.

[0075] The first slide rail 940 includes two plates arranged in parallel and spaced apart on the base plate 930, and the top of the first slide rail 940 is provided with a first sliding groove 941 in the first direction; the second slide rail 950 can be in the form of a frame, and the bottom of the second slide rail 950 is provided with a sliding block 951 matched with the first sliding groove 941 in the first direction; the first sliding groove 941 and the sliding block 951 can be a dovetail groove or a T-shaped groove matching structure; the opposite inner surfaces of the second slide rail 950 are provided with a second sliding groove 952 in the second direction, and the adjusting member 960 is slidingly assembled based on the second sliding groove 952.

[0076] The adjusting member 960 can be used to apply a downward pressure to any deformation area 913 or apply an upward pulling force by hooking or vacuum adsorption to adjust the radio frequency parameters of the cavity filter. The debugging device provided by the present application is separated from the cavity filter after adjustment, which can avoid the problem that the tuning screw is easily loosened or misoperated to affect the adjusted radio frequency parameters after adjustment in the prior art.

[0077] It can be understood that in the above embodiments, when the resonant tube is integrally formed, welded, riveted or crimped with the cover plate, the cylinder rod 962 can act on the bottom of the resonant tube or the deformation area, which can be determined according to the specific situation. When the resonant tube 412 is connected with the cover plate body 411 through the connecting cylinder 417, the cylinder rod 962 can act on the adjusting screw 432, and at this time the resonant tube 412 moves up and down as a whole, and the resonant tube 412 itself does not deform, which can achieve the effect of keeping the consistency of the filter parameters.

[0078] In summary, those skilled in the art can easily understand that the cavity filter and the cover plate assembly thereof and the communication device comprising the cavity filter provided by the present application can reduce the structural members in the resonant cavity by connecting the resonant tube with the cover plate to form the cover plate assembly, and optimize the radio frequency adjustment.

[0079] The above is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings of the present application, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A tuning device for a cavity filter, characterized by The debugging device is used for applying an adjusting force to a cover plate assembly of a cavity filter, the cover plate assembly comprising a cover plate body and a resonant tube connected with the cover plate body, the debugging device comprising a bracket and an adjusting member slidably arranged on the bracket, the bracket comprising a base plate and a sliding rail arranged on the base plate, the sliding rail and the base plate being used for placing the cavity filter, the adjusting member being arranged on the sliding rail; The adjusting member is used for applying a downward pressure or an upward pulling force to the cover plate body to adjust a position state of the resonant tube relative to the cover plate body; or, an internal space of the resonant tube is communicated to an outside of the cover plate body, and the adjusting member is used for extending into the internal space of the resonant tube and applying a downward pressure or an upward pulling force to the resonant tube to adjust the position state of the resonant tube relative to the cover plate body.

2. The commissioning device of claim 1, wherein, The adjusting member is a telescopic cylinder, the telescopic cylinder comprising a cylinder body and a cylinder rod telescopically connected with the cylinder body, the cylinder body being slidably arranged through the bracket, and the cylinder rod being used for applying an adjusting force to adjust the position state of the resonant tube relative to the cover plate body.

3. The commissioning device of claim 2, wherein, The cover plate body is provided with a deformation zone, the deformation zone being a region of the cover plate body surrounding a periphery of the resonant tube, and a free end of the cylinder rod being in a convex ring shape.

4. The commissioning device of claim 3, wherein, The deformation zone is in a single-ring groove shape or a multi-ring groove shape, and the free end of the cylinder rod is in a single-ring convex ring shape or a multi-ring convex ring shape.

5. The commissioning device of claim 3, wherein, The deformation zone is provided with a lifting member, and a free end of the cylinder rod is provided with a pulling member, the pulling member being matched with the lifting member to apply an adjusting force.

6. The commissioning device of claim 2, wherein, The resonant tube comprises a ring wall and a bottom wall, a top end of the ring wall being connected with the cover plate body, a bottom end of the ring wall being connected with the bottom wall, and the cylinder rod acting on the bottom wall to apply an adjusting force.

7. The commissioning device of claim 6, wherein, The bottom wall is provided with a lifting member, and a free end of the cylinder rod is provided with a pulling member, the pulling member being matched with the lifting member to apply an adjusting force.

8. The commissioning device of claim 1, wherein, The sliding rail comprises a first sliding rail arranged on the base plate, and a second sliding rail slidably arranged on the first sliding rail in a first direction, and the adjusting member is slidably arranged on the second sliding rail in a second direction.

9. The commissioning device of claim 8, wherein, The first sliding rails are arranged in parallel and spaced apart on the base plate, a top portion of the first sliding rail is provided with a first sliding groove in the first direction, a bottom portion of the second sliding rail is provided with a sliding block matched with the first sliding groove in the first direction, and opposite inner surfaces of the second sliding rail are provided with second sliding grooves in the second direction, and the adjusting member is slidably assembled based on the second sliding grooves.

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