Filter and communication device

Abstract

The application relates to the field of radio frequency devices, and provides a filter and a communication device. The filter comprises a cavity, a resonant rod, a cover plate and a tuning screw. The resonant rod is arranged in the cavity; the cover plate covers the cavity, and the cover plate comprises a protection plate and a tuning plate connected between the protection plate and the cavity; the tuning plate comprises a tuning part corresponding to the resonant rod; the side of the tuning part close to the protection plate is provided with an adjusting structure; the protection plate is provided with a threaded hole penetratingly arranged along a first direction and corresponding to the adjusting structure; and the tuning screw is threadedly connected to the threaded hole and used for driving the adjusting structure to move along the first direction, so as to drive the tuning part to deform. The filter is convenient and fast to adjust, and has high adjustment efficiency and high adjustment accuracy; and since the frequency adjustment range is not limited to the internal depth of the cavity, the frequency adjustable range is large, and the product performance index is high.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of radio frequency devices, and particularly relates to a filter and a communication device. BACKGROUND

[0002] The existing filter usually comprises a cavity, a cover plate covering the cavity, and a tuning screw threadedly connected to the cover plate. The existing filter can adjust the length of the tuning screw deep into the cavity by rotating the tuning screw, so as to realize the adjustment of the frequency signal. However, with the development of miniaturization of the filter, the internal depth of the cavity is reduced, which leads to insufficient adjustment space of the tuning screw, resulting in a small frequency adjustment range of the filter and low product performance index. SUMMARY

[0003] The purpose of the embodiments of the present application is to provide a filter to solve the problem of small frequency adjustment range and low product performance index of the existing filter.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the embodiments of the present application is as follows: a filter comprising:

[0005] a cavity;

[0006] a resonant rod arranged in the cavity;

[0007] a cover plate covering the cavity, the cover plate comprising a protection plate and a tuning plate connected between the protection plate and the cavity, the tuning plate comprising a tuning portion corresponding to the resonant rod, the tuning portion being provided with an adjusting structure on the side close to the protection plate, and the protection plate being provided with a threaded hole penetratingly arranged along a first direction and corresponding to the adjusting structure;

[0008] a tuning screw threadedly connected to the threaded hole, for driving the adjusting structure to move along the first direction, so as to drive the tuning portion to deform.

[0009] In some embodiments, the tuning screw is connected with the adjusting structure, the relative position of the tuning screw and the adjusting structure in the first direction is relatively fixed, and the tuning screw can rotate relative to the adjusting structure.

[0010] In some embodiments, the end face of the tuning screw close to the adjusting structure is provided with a limiting groove, the limiting groove is arranged along the radial direction of the tuning screw and passes through the rotation axis of the tuning screw, and at least one end of the limiting groove along the extending direction thereof is communicated to the outside;

[0011] the adjusting structure is mounted in the limiting groove and is limited from being out of the slot of the limiting groove and located at the rotation axis of the tuning screw.

[0012] In some embodiments, the adjusting structure comprises a limiting portion in a spherical or cylindrical shape, and a connecting portion in a spherical or cylindrical shape connected between the limiting portion and the tuning portion, wherein a projection area of the limiting portion along the first direction is greater than a projection area of the connecting portion along the first direction.

[0013] The limiting groove comprises a first sub-groove and a second sub-groove arranged in sequence along a groove depth direction of the limiting groove, the connecting portion is installed in the first sub-groove, and the limiting portion is installed in the second sub-groove.

[0014] In some embodiments, the tuning screw is provided with a limiting hole near an end face of the adjusting structure, the limiting hole is arranged along the first direction and is located on a rotation axis of the tuning screw.

[0015] The adjusting structure is embedded in the limiting hole and is limited from being taken out of an aperture of the limiting hole.

[0016] In some embodiments, the adjusting structure comprises a limiting portion in a spherical or cylindrical shape, and a connecting portion in a spherical or cylindrical shape connected between the limiting portion and the tuning portion, wherein a projection area of the limiting portion along the first direction is greater than a projection area of the connecting portion along the first direction.

[0017] The limiting hole comprises a first hole segment and a second hole segment arranged in sequence along a hole depth direction of the limiting hole, the connecting portion is installed in the first hole segment, and the limiting portion is installed in the second hole segment.

[0018] In some embodiments, a hole wall of the limiting hole is provided with at least one truncated groove, which is communicated to the outside along an extension direction thereof.

[0019] In some embodiments, an end face of the tuning screw near the tuning portion is arranged to be spaced apart from the tuning portion.

[0020] In some embodiments, an end face of the tuning screw away from the adjusting structure is provided with an adjusting groove for an external tool to drive the tuning screw to rotate via the adjusting groove.

[0021] In some embodiments, the tuning screw does not protrude from the protective plate along the first direction.

[0022] The purpose of the embodiments of the present application is to provide a communication device comprising the filter.

[0023] The filter provided by the present application has the following beneficial effects:

[0024] The filter provided in this application embodiment achieves shielding by having the tuning plate and protective plate of the cover plate jointly cover the cavity, preventing signal leakage. Furthermore, by rotating the tuning screw relative to the threaded hole, the tuning screw reciprocates along a first direction within the threaded hole. This allows the tuning screw to move the adjustment structure at least towards the cavity, and even away from the cavity. The movement of the adjustment structure along the first direction causes plastic deformation of the tuning section, thereby adjusting the frequency signal. The adjustment operation is convenient and quick, with high adjustment efficiency and accuracy. Moreover, since the frequency adjustment range is not limited by the internal depth of the cavity, the adjustable frequency range is large, resulting in high product performance indicators. Attached Figure Description

[0025] To clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments 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.

[0026] Figure 1 A three-dimensional schematic diagram of a filter provided in one embodiment of this application;

[0027] Figure 2 for Figure 1 The provided filter is shown in a cross-sectional view along AA.

[0028] Figure 3 This is a schematic diagram of the engagement of a tuning screw and an adjustment structure according to an embodiment of this application, wherein the tuning screw is provided with a limiting groove;

[0029] Figure 4 for Figure 3 Exploded view of the provided tuning screw and adjustment structure;

[0030] Figure 5 This is a schematic diagram of the engagement of a tuning screw and an adjustment structure according to another embodiment of this application, wherein the tuning screw is provided with a limiting hole and a cut-off groove;

[0031] Figure 6 for Figure 5 Exploded view of the provided tuning screw and adjustment structure;

[0032] Figure 7 This is a cross-sectional view of a filter provided in another embodiment of this application, wherein the end face of the tuning screw near the tuning section is spaced apart from the tuning section.

[0033] The following are the labeling elements in the figure:

[0034] 10-cavity, 11-resonant cavity; 20-resonant rod; 30-cover plate, 31-protection plate, 311-threaded hole, 32-tuning plate, 321-tuning part, 322-adjusting structure, 3221-limiting part, 3222-connecting part; 40-tuning screw, 41-limiting groove, 411-first sub-groove, 412-second sub-groove, 42-limiting hole, 421-first hole section, 422-second hole section, 43-truncated groove, 44-adjusting groove. DETAILED DESCRIPTION

[0035] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clear, the present application will be described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0036] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0038] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] Existing filters typically consist of a cavity, a cover plate that encloses the cavity, and a tuning screw threaded to the cover plate. Existing filters allow adjustment of the frequency signal by rotating the tuning screw, thus changing the length of the screw's insertion into the cavity. However, with the miniaturization of filters, the internal depth of the cavity has decreased, resulting in insufficient adjustment space for the tuning screw. This leads to a smaller frequency adjustment range and lower product performance.

[0040] Therefore, some embodiments of this application provide a filter that allows for reciprocating movement of a tuning screw within a threaded hole along a first direction. This movement, via the tuning screw, at least moves the adjustment structure closer to the cavity, and may even move it further away from the cavity. The movement of the adjustment structure along the first direction causes plastic deformation of the tuning section, thereby adjusting the frequency signal. The adjustment operation is convenient and quick, with high efficiency and accuracy. Furthermore, since the frequency adjustment range is not limited by the internal depth of the cavity, the adjustable frequency range is large, resulting in high product performance.

[0041] The specific implementation of this application will be described in detail below with reference to specific embodiments:

[0042] Please see Figure 1 , Figure 2 Some embodiments of this application provide a filter, including a cavity 10, a resonant rod 20, a cover plate 30, and a tuning screw 40. The resonant rod 20 is disposed within the cavity 10; the cover plate 30 covers the cavity 10 and includes a protective plate 31 and a tuning plate 32 connected between the protective plate 31 and the cavity 10. The tuning plate 32 includes a tuning part 321 corresponding to the resonant rod 20. An adjustment structure 322 is provided on the side of the tuning part 321 near the protective plate 31. The protective plate 31 has a threaded hole 311 that extends along a first direction z and corresponds to the adjustment structure 322; the tuning screw 40 is threadedly connected to the threaded hole 311 and is used to drive the adjustment structure 322 to move along the first direction z, thereby deforming the tuning part 321.

[0043] It should be noted that the cavity 10 contains a resonant cavity 11. The resonant cavity 11 of the cavity 10 contains a resonant rod 20, and the number of resonant rods 20 can be one or more. The resonant rod 20 can be a metal resonant rod, a ceramic dielectric resonant rod, or a dielectric resonant rod of other materials; the resonant rod 20 can be a hollow resonant rod or a solid resonant rod; the resonant rod 20 can have a resonant disk or not; the resonant disk can have a flange or not; the resonant rod 20 can be a circular rod, a polygonal rod, an irregularly shaped rod, a sheet metal resonant rod, or a resonant rod of other shapes; etc. This embodiment does not impose any limitations on these aspects.

[0044] It is also to be noted that the cover plate 30 covers the cavity 10, especially the resonant cavity 11, to achieve a shielding function to prevent signal leakage.

[0045] Specifically, in one possible implementation, the tuning plate 32 of the cover plate 30 is a metal piece. The tuning plate 32 is connected with the cavity 10, or the tuning plate 32 is connected with the protective plate 31 and the cavity 10. The cover plate 30 can cover the cavity 10 through the tuning plate 32 to achieve a shielding function to prevent signal leakage. The protective plate 31 of the cover plate 30 is not limited to a metal piece or a non-metal piece. The cover plate 30 can form reliable fastening and protection effects on the tuning plate 32 through the protective plate 31 to ensure and improve the connection sealing between the tuning plate 32 and the cavity 10 and effectively block external objects or external forces from damaging the tuning plate 32. When the protective plate 31 is a non-metal piece, for example, the protective plate 31 is made of plastic, wood or other materials, the material cost of the cover plate 30 and the filter can be greatly reduced, and the weight can be reduced.

[0046] In another possible implementation, the tuning plate 32 and the protective plate 31 of the cover plate 30 are metal pieces. The tuning plate 32 is connected with the protective plate 31, and the protective plate 31 is connected with the cavity 10. The cover plate 30 can cover the resonant cavity 11 of the cavity 10 through the protective plate 31 cooperating with the tuning plate 32 to achieve a shielding function through the protective plate 31 and the tuning plate 32 to prevent signal leakage. In addition, the cover plate 30 can form reliable fastening and protection effects on the tuning plate 32 through the protective plate 31 to ensure and improve the connection sealing between the cover plate 30 and the cavity 10 and effectively block external objects or external forces from damaging the tuning plate 32.

[0047] In another possible implementation, the tuning plate 32 and the protective plate 31 of the cover plate 30 are metal pieces. The tuning plate 32 and the protective plate 31 are an integrated structure. The tuning plate 32 is a thinned structure of the protective plate 31. Specifically, the tuning part 321 of the tuning plate 32 is formed by milling thin part of the protective plate 31. Based on this, the cover plate 30 can also cover the resonant cavity 11 of the cavity 10 through the integrally connected tuning plate 32 and the protective plate 31 to achieve a shielding function to prevent signal leakage.

[0048] It is also to be noted that the tuning plate 32 of the cover plate 30 is made of a metal material with plastic deformation characteristics, for example, made of aluminum foil, silver foil or metal alloy. The tuning plate 32 can be but is not limited to a plate structure or a sheet structure. The tuning plate 32 has a tuning part 321 corresponding to the resonant rod 20. The tuning part 321 can be deformed under force and does not automatically rebound.

[0049] Specifically, as shown in FIG. 1, the tuning plate 32 of the cover plate 30 is connected with the protective plate 31. The tuning plate 32 is connected with the cavity 10 through the protective plate 31. The tuning plate 32 is connected with the resonant rod 20 through the cavity 10. The tuning plate 32 is connected with the protective plate 31 through the cavity 10. Figure 2As shown, in a possible implementation, the resonant rod 20 is connected to the cavity 10, and an end of the resonant rod 20 away from the cavity 10 is opposite to the tuning part 321. The tuning part 321 can be deformed by force to change the distance between the tuning part 321 and the resonant rod 20, to adjust the size of the capacitance between the tuning part 321 and the resonant rod 20, and to adjust the frequency signal. The resonant rod 20 can be connected to the cavity 10 in a manner such as but not limited to integral connection, welding, screw fastening, threaded connection, riveting, pressure connection, clamping, and the like.

[0050] It should be further noted that the side of the tuning part 321 close to the protective plate 31 (i.e., the side of the tuning part 321 away from the cavity 10) is provided with an adjusting structure 322. The form and size of the adjusting structure 322 are not limited in this embodiment. The adjusting structure 322 can be integrally connected with the tuning part 321 or separately connected with the tuning part 321. When the adjusting structure 322 is separately connected with the tuning part 321, the adjusting structure 322 can be separately connected with the tuning part 321 in a manner such as but not limited to welding, for example, laser welding or ultrasonic welding. The specific connection manner between the adjusting structure 322 and the tuning part 321 is not uniquely limited in this embodiment.

[0051] The protective plate 31 is provided with a threaded hole 311 penetrating along a first direction z, and the first direction z substantially corresponds to the thickness direction of the protective plate 31. The threaded holes 311 are provided in one-to-one correspondence with the adjusting structures 322, and the projection of the threaded hole 311 along the first direction z covers the projection of the adjusting structure 322 along the first direction z, so that the adjusting structure 322 can be provided in the threaded hole 311.

[0052] The hole wall of the threaded hole 311 is provided with an internal thread, and the outer periphery of the tuning screw 40 is provided with an external thread. The tuning screw 40 is threadedly connected in the threaded hole 311. Based on this, the tuning screw 40 can be reciprocally moved in the threaded hole 311 along the first direction z by rotating the tuning screw 40, so that the tuning screw 40 can at least drive the adjusting structure 322 to move towards the cavity 10, or even drive the adjusting structure 322 to move away from the cavity 10, and then the movement of the adjusting structure 322 along the first direction z can drive the tuning part 321 to plastically deform, to adjust the frequency signal. The adjusting operation is convenient and fast, and the adjusting efficiency and adjusting accuracy are high. Moreover, the frequency adjustment range is not limited by the internal depth of the cavity 10, and the frequency adjustment range is large.

[0053] It should be further noted that the tuning screw 40 can be a metal piece or a non-metal piece, and the present embodiment does not limit this. When the tuning screw 40 is a metal piece, the connection strength between the tuning screw 40 and the threaded hole 311 is higher, and the tuning screw 40 is not easy to break. When the tuning screw 40 is a non-metal piece, for example, an insulating piece such as plastic, the cost can be greatly reduced.

[0054] In summary, the filter provided by the embodiment of the present application realizes the shielding function by the tuning plate 32 and the protection plate 31 of the cover plate 30 to prevent signal leakage. On this basis, the tuning screw 40 is rotated relative to the threaded hole 311, so that the tuning screw 40 reciprocates in the first direction z in the threaded hole 311. Based on this, the tuning screw 40 at least drives the adjusting structure 322 to move towards the cavity 10, or even drives the adjusting structure 322 to move away from the cavity 10, so that the movement of the adjusting structure 322 in the first direction z drives the tuning part 321 to plastically deform, and the frequency signal is adjusted. The adjustment operation is convenient and fast, the adjustment efficiency and the adjustment accuracy are high, and since the frequency adjustment range is not limited by the internal depth of the cavity 10, the frequency adjustable range is large, and the product performance index is high.

[0055] In addition, the filter provided by the embodiment of the present application only needs to use the tuning screw 40 of a preset specification connected in the threaded hole 311, without frequently replacing the tuning screw 40 of different length specifications as in the existing filter, so that the material and cost can be saved, and the adjustment convenience and the adjustment efficiency can be effectively guaranteed and improved.

[0056] In addition, the filter provided by the embodiment of the present application can accurately control and quantize the movement stroke of the adjusting structure 322 in the first direction z through the rotation number and the movement stroke of the tuning screw 40 in the first direction z, so as to accurately control and quantize the deformation amount of the tuning part 321, and further realize guaranteeing and improving the adjustment accuracy of the frequency signal.

[0057] In addition, the filter provided by the embodiment of the present application, on the one hand, since its frequency adjustment mode is to make the tuning part 321 deform, the tuning screw 40 does not need to be inserted into the cavity 10 for adjustment, and on the other hand, since the tuning plate 32 is a metal piece, it can play a shielding role on the signal in cooperation with the protection plate 31, so that the material and material of the tuning screw 40 can be more flexibly selected and used, and the tuning screw 40 of the metal material can only be selected in the existing filter, but the tuning screw 40 of the non-metal material such as plastic can also be used, which can greatly reduce the cost and reduce the weight of the filter.

[0058] In addition, the filter provided by the embodiment of the present application can avoid the situation that the tuning screw 40 excessively penetrates into the cavity 10 or even rubs against the cavity 10 by adjusting the deformation of the tuning part 321, thereby effectively reducing the risk of the filter discharging high power or arcing, and basically not generating burrs or debris falling into the cavity 10 during the adjustment, and even the tuning plate 32 and the protection plate 31 jointly covering the cavity 10 and the tuning screw 40 threaded into the threaded hole 311 can effectively prevent external impurities from entering the cavity 10, thereby effectively guaranteeing and improving the intermodulation stability and power index of the filter, and reducing the risk of generating intermodulation.

[0059] Please refer to Figure 1 、 Figure 2 In some embodiments of the present application, the tuning screw 40 is connected with the adjusting structure 322, the relative position of the tuning screw 40 and the adjusting structure 322 in the first direction z is relatively fixed, and the tuning screw 40 can rotate relative to the adjusting structure 322.

[0060] It should be noted that the tuning screw 40 is connected with the adjusting structure 322 in a split manner, and the specific connection mode between the tuning screw 40 and the adjusting structure 322 is not limited in the present embodiment. The connection between the tuning screw 40 and the adjusting structure 322 needs to ensure that the tuning screw 40 can rotate relative to the adjusting structure 322, and at the same time, the relative position of the tuning screw 40 and the adjusting structure 322 in the first direction z is relatively fixed.

[0061] Thus, by adopting the above scheme, the relative position of the tuning screw 40 and the adjusting structure 322 in the first direction z can be fixed by connecting the tuning screw 40 and the adjusting structure 322, on the basis of ensuring that the tuning screw 40 can rotate relative to the adjusting structure 322. Based on this, during the adjustment process, the tuning screw 40 and the adjusting structure 322 can keep moving synchronously in the first direction z. Specifically, during the adjustment process, the tuning screw 40 can be rotated to move the tuning screw 40 in the threaded hole 311 in the direction close to the cavity 10, thereby driving the adjusting structure 322 to move synchronously in the direction close to the cavity 10, so as to drive the tuning part 321 to plastically deform towards the side close to the cavity 10; or the tuning screw 40 can be rotated to move the tuning screw 40 in the threaded hole 311 in the direction away from the cavity 10, thereby driving the adjusting structure 322 to move synchronously in the direction away from the cavity 10, so as to drive the tuning part 321 to plastically deform towards the side away from the cavity 10. Thus, the frequency signal can be adjusted by driving the tuning part 321 to plastically deform towards the side close to the cavity 10, and the frequency signal can also be adjusted by driving the tuning part 321 to plastically deform towards the side away from the cavity 10, so as to effectively ensure and expand the frequency adjustable range. Moreover, since the frequency signal can be adjusted by driving the tuning part 321 to plastically deform towards the side close to the cavity 10, and the frequency signal can also be adjusted by driving the tuning part 321 to plastically deform towards the side away from the cavity 10, when the deformation amount of the tuning part 321 towards the side close to the cavity 10 is too large, the tuning part 321 can be driven to plastically deform towards the side away from the cavity 10, that is, the tuning part 321 can be driven to deform in the opposite direction, so as to correct the frequency signal index, thereby making the frequency adjustment of the filter have better adjustability and correctability. Moreover, since the tuning screw 40 and the adjusting structure 322 move synchronously in the first direction z, the movement stroke of the adjusting structure 322 along the first direction z, the deformation amount of the tuning part 321 can be more accurately controlled and quantified by accurately controlling and quantifying the rotation number of the tuning screw 40 and the movement stroke of the tuning screw 40 along the first direction z, thereby effectively improving the frequency adjustment precision.

[0062] Please refer to Figure 2 , Figure 3 , Figure 4 In some embodiments of the present application, the end face of the tuning screw 40 close to the adjusting structure 322 is provided with a limiting groove 41, the limiting groove 41 is arranged along the radial direction of the tuning screw 40 and passes through the rotation axis L of the tuning screw 40, and at least one end of the limiting groove 41 along the extending direction thereof is communicated to the outside; the adjusting structure 322 is installed in the limiting groove 41 and is limited from being taken out of the slot of the limiting groove 41 and located on the rotation axis L of the tuning screw 40.

[0063] It should be noted that the limiting groove 41 is arranged on the end face of the tuning screw 40 close to the adjusting structure 322. The limiting groove 41 extends along the radial direction of the tuning screw 40, and the limiting groove 41 passes through the rotation axis L of the tuning screw 40, and the rotation axis L of the tuning screw 40 substantially corresponds to the central axis of the tuning screw 40.

[0064] As shown in Figure 4 In a possible implementation, both ends of the limiting groove 41 along the extending direction thereof are communicated to the outside, so as to facilitate the adjusting structure 322 to be slid into and installed in the limiting groove 41 from any end of the limiting groove 41 communicated to the outside.

[0065] Of course, in other possible implementations, one end of the limiting groove 41 along the extending direction thereof is communicated to the outside, and the other end of the limiting groove 41 along the extending direction thereof is not communicated to the outside. In this way, the adjusting structure 322 can also be facilitated to be slid into and installed in the limiting groove 41 from the end of the limiting groove 41 communicated to the outside, and meanwhile, the end of the limiting groove 41 not communicated to the outside can limit the adjusting structure 322, so as to prevent the adjusting structure 322 from being pulled out along the extending direction of the limiting groove 41.

[0066] It should be further noted that when the adjusting structure 322 is installed in the limiting groove 41 and the tuning screw 40 is threadedly connected to the threaded hole 311, the adjusting structure 322 can be adapted to slide and substantially align to the rotation axis L of the tuning screw 40. At this time, the tuning screw 40 can be facilitated to rotate relative to the adjusting structure 322, and during this process, the tuning screw 40 and the adjusting structure 322 substantially do not have relative planar movement. On this basis, based on some structural design, the adjusting structure 322 can be limited to be pulled out from the slot of the limiting groove 41, so as to facilitate the relative position between the tuning screw 40 and the adjusting structure 322 in the first direction z to be relatively fixed on the basis of ensuring that the tuning screw 40 can rotate relative to the adjusting structure 322.

[0067] Thus, by employing the above scheme, the assembly between the adjusting structure 322 and the tuning screw 40 can be conveniently and quickly completed by sliding the adjusting structure 322 from the end of the limiting groove 41 communicating with the outside into the limiting groove 41. Moreover, when the adjusting structure 322 is installed in the limiting groove 41 and the tuning screw 40 is threadedly connected in the threaded hole 311, the adjusting structure 322 can be adapted to slide and substantially align at the rotation axis L of the tuning screw 40, at which time, the tuning screw 40 can be conveniently rotated relative to the adjusting structure 322 about the rotation axis L thereof, and the relative planar movement between the tuning screw 40 and the adjusting structure 322 is substantially prevented. On this basis, in combination with the design that the adjusting structure 322 is limited from being detached from the slot opening of the limiting groove 41, the relative position between the tuning screw 40 and the adjusting structure 322 in the first direction z can be relatively fixed on the basis of ensuring that the tuning screw 40 can be rotated relative to the adjusting structure 322, and thus the connection between the adjusting structure 322 and the tuning screw 40 can be reliable and effective, and it can be ensured that the tuning screw 40 and the adjusting structure 322 can keep moving synchronously in the first direction z during the adjustment process.

[0068] Please refer to Figure 2 、 Figure 3 、 Figure 4 In some embodiments of the present application, the adjusting structure 322 comprises a limiting portion 3221 in a spherical or cylindrical shape, and a connecting portion 3222 in a spherical or cylindrical shape connected between the limiting portion 3221 and the tuning portion 321, and the projection area of the limiting portion 3221 along the first direction z is greater than the projection area of the connecting portion 3222 along the first direction z; the limiting groove 41 comprises a first sub-groove 411 and a second sub-groove 412 arranged in sequence along the groove depth direction of the limiting groove 41, the connecting portion 3222 is installed in the first sub-groove 411, and the limiting portion 3221 is installed in the second sub-groove 412.

[0069] It should be noted that the adjusting structure 322 comprises the limiting portion 3221 and the connecting portion 3222, and the connecting portion 3222 is connected between the limiting portion 3221 and the tuning portion 321. Among them, the limiting portion 3221 and the connecting portion 3222 can be integrally connected or separately connected. When the limiting portion 3221 and the connecting portion 3222 are separately connected, the limiting portion 3221 can be connected with the connecting portion 3222 by welding or other means, but not limited to this, and the specific connection method between the limiting portion 3221 and the connecting portion 3222 is not uniquely limited in the present embodiment.

[0070] Among them, in order to facilitate the rotation of the tuning screw 40 relative to the adjusting structure 322, the limiting portion 3221 is spherical or cylindrical, the connecting portion 3222 is spherical or cylindrical, and the limiting portion 3221 and the connecting portion 3222 can be combined at will, which will not be enumerated one by one here.

[0071] It should be noted that the projection area of the limiting portion 3221 along the first direction z is greater than the projection area of the connecting portion 3222 along the first direction z, that is, in the first direction z, the cross-sectional size of the limiting portion 3221 is greater than the cross-sectional size of the connecting portion 3222.

[0072] Correspondingly, in the limiting groove 41, the first sub-groove 411 located on the groove side of the limiting groove 41 is designed to be matched with the connecting portion 3222, so that the connecting portion 3222 can be matched and installed in the first sub-groove 411; and the second sub-groove 412 located on the groove bottom side of the limiting groove 41 is designed to be matched with the limiting portion 3221, so that the limiting portion 3221 can be matched and installed in the second sub-groove 412.

[0073] Based on this, after the adjusting structure 322 is installed in the limiting groove 41, the limiting portion 3221 can be effectively and reliably limited from being pulled out through the first sub-groove 411, so that the limiting structure 322 can be limited from being pulled out from the notch of the limiting groove 41. Thus, by using the above-mentioned scheme, the assembly between the adjusting structure 322 and the tuning screw 40 can be conveniently and quickly completed based on a simple structure design, and the relative position between the tuning screw 40 and the adjusting structure 322 in the first direction z can be relatively fixed on the basis of ensuring that the tuning screw 40 can rotate relative to the adjusting structure 322.

[0074] Please refer to Figure 2 , Figure 5 , Figure 6 In some embodiments of the present application, the end surface of the tuning screw 40 close to the adjusting structure 322 is provided with a limiting hole 42, the limiting hole 42 is arranged to extend along the first direction z and is located on the rotation axis L of the tuning screw 40; the adjusting structure 322 is embedded in the limiting hole 42 and is limited from being pulled out from the hole of the limiting hole 42.

[0075] It should be noted that the limiting hole 42 is opened on the end surface of the tuning screw 40 close to the adjusting structure 322. The limiting hole 42 is arranged to extend along the first direction z, and the limiting hole 42 is located on the rotation axis L of the tuning screw 40, and the rotation axis L of the tuning screw 40 substantially corresponds to the central axis of the tuning screw 40.

[0076] The adjusting structure 322 can be inserted into the limiting hole 42 from the hole opening of the limiting hole 42 by an operator. After the adjusting structure 322 is inserted into the limiting hole 42, the adjusting structure 322 is substantially aligned with the rotation axis L of the tuning screw 40, at this time, the tuning screw 40 is facilitated to rotate relative to the adjusting structure 322, and it is ensured that the tuning screw 40 and the adjusting structure 322 do not substantially move relative to each other in the plane. On this basis, based on some structural design, the adjusting structure 322 is limited to be taken out of the hole opening of the limiting hole 42, so that the relative position of the tuning screw 40 and the adjusting structure 322 in the first direction z is relatively fixed on the basis of ensuring that the tuning screw 40 can rotate relative to the adjusting structure 322.

[0077] Thus, by adopting the above scheme, the assembly between the adjusting structure 322 and the tuning screw 40 can be conveniently and quickly completed by inserting the adjusting structure 322 into the limiting hole 42 from the hole opening of the limiting hole 42. Moreover, when the adjusting structure 322 is installed in the limiting hole 42 and the tuning screw 40 is threadedly connected in the threaded hole 311, the adjusting structure 322 will be substantially stabilized and aligned with the rotation axis L of the tuning screw 40, at this time, the tuning screw 40 is facilitated to rotate relative to the adjusting structure 322 about the rotation axis L thereof, and it is ensured that the tuning screw 40 and the adjusting structure 322 do not substantially move relative to each other in the plane. On this basis, in combination with the design that the adjusting structure 322 is limited to be taken out of the hole opening of the limiting hole 42, the relative position of the tuning screw 40 and the adjusting structure 322 in the first direction z is relatively fixed on the basis of ensuring that the tuning screw 40 can rotate relative to the adjusting structure 322, thereby ensuring that the connection between the adjusting structure 322 and the tuning screw 40 is reliable and effective, and the tuning screw 40 and the adjusting structure 322 can be kept moving synchronously in the first direction z during the adjustment process.

[0078] Please refer to Figure 2 、 Figure 5 、 Figure 6 In some embodiments of the present application, the adjusting structure 322 includes a limiting portion 3221 in a spherical or cylindrical shape, and a connecting portion 3222 in a spherical or cylindrical shape connected between the limiting portion 3221 and the tuning portion 321, the projection area of the limiting portion 3221 in the first direction z is greater than the projection area of the connecting portion 3222 in the first direction z; the limiting hole 42 includes a first hole section 421 and a second hole section 422 arranged in sequence in the hole depth direction of the limiting hole 42, the connecting portion 3222 is installed in the first hole section 421, and the limiting portion 3221 is installed in the second hole section 422.

[0079] It should be noted that the adjusting structure 322 includes a limiting portion 3221 and a connecting portion 3222, and the connecting portion 3222 is connected between the limiting portion 3221 and the tuning portion 321. The limiting portion 3221 and the connecting portion 3222 can be integrally connected or separately connected. When the limiting portion 3221 and the connecting portion 3222 are separately connected, the limiting portion 3221 can be connected to the connecting portion 3222 by welding or other methods, and the specific connection method between the limiting portion 3221 and the connecting portion 3222 is not limited in the embodiment.

[0080] In order to facilitate the rotation of the tuning screw 40 relative to the adjusting structure 322, the limiting portion 3221 is spherical or cylindrical, the connecting portion 3222 is spherical or cylindrical, and the limiting portion 3221 and the connecting portion 3222 can be combined at will, and the combination form is not listed one by one here.

[0081] It should also be noted that the projection area of the limiting portion 3221 along the first direction z is greater than the projection area of the connecting portion 3222 along the first direction z, that is, in the first direction z, the cross-sectional size of the limiting portion 3221 is greater than that of the connecting portion 3222.

[0082] Correspondingly, in the limiting hole 42, the first hole section 421 located on the hole opening side of the limiting hole 42 is designed to correspond to the connecting portion 3222, so that the connecting portion 3222 can be fitted and installed in the first hole section 421; and the second hole section 422 located on the hole bottom side of the limiting hole 42 is designed to correspond to the limiting portion 3221, so that the limiting portion 3221 can be fitted and installed in the second hole section 422.

[0083] Based on this, after the adjusting structure 322 is embedded in the limiting hole 42, the limiting portion 3221 can be effectively and reliably prevented from being removed through the first hole section 421, so that the adjusting structure 322 can be prevented from being removed from the hole opening of the limiting hole 42. Thus, by using the above scheme, the assembly between the adjusting structure 322 and the tuning screw 40 can be conveniently and quickly completed based on a simple structure design, and the relative position between the tuning screw 40 and the adjusting structure 322 in the first direction z can be relatively fixed on the basis of ensuring that the tuning screw 40 can rotate relative to the adjusting structure 322.

[0084] Please refer to Figure 2 , Figure 5 , Figure 6 In some embodiments of the present application, the hole wall of the limiting hole 42 is provided with at least one truncated groove 43, and the truncated groove 43 is communicated to the outside along its extension direction.

[0085] It should be noted that the hole wall of the limiting hole 42 can be provided with one or more truncated grooves 43. When multiple truncated grooves 43 are provided, the multiple truncated grooves 43 are spaced apart along the circumference of the limiting hole 42. The specific number of the truncated grooves 43, the specific position of the truncated grooves 43 on the hole wall of the limiting hole 42, and the specific shape of the truncated grooves 43 are not limited in this embodiment.

[0086] Optionally, as shown in Figure 5 、 Figure 6 , the truncated grooves 43 are provided with two, and the two truncated grooves 43 are oppositely arranged along the radial direction of the limiting hole 42. Both of the two truncated grooves 43 extend along the radial direction of the limiting hole 42 and are connected to the outside. In this way, the distribution of the truncated grooves 43 can be balanced, and the truncation effect of the truncated grooves 43 on the limiting hole 42 and the tuning screw 40 can be balanced.

[0087] By adopting the above scheme, the hole wall of the limiting hole 42 and the corresponding part of the tuning screw 40 can be truncated by the truncated grooves 43, the hole wall of the limiting hole 42 and the corresponding part of the tuning screw 40 can be completely continuous in the circumferential direction, and the deformation space of the truncated part of the tuning screw 40 can be provided by the truncated grooves 43. Based on this, during the embedding of the adjusting structure 322 into the limiting hole 42, the truncated part of the tuning screw 40 can be expanded and deformed outward to slightly reduce the difficulty of embedding the adjusting structure 322 into the limiting hole 42. Therefore, on the basis of ensuring the connection reliability of the adjusting structure 322 and the tuning screw 40 after assembly, the assembly convenience and efficiency between the adjusting structure 322 and the tuning screw 40 can be improved.

[0088] Among them, the groove depth of the truncated groove 43 is less than or equal to the hole depth of the limiting hole 42. In this way, the part of the tuning screw 40 that is not provided with the limiting hole 42, or even the part close to the bottom of the limiting hole 42, can be kept complete and continuous in the circumferential direction. Based on this, on the basis of improving the assembly convenience and efficiency between the adjusting structure 322 and the tuning screw 40, the structural strength of the tuning screw 40 can be ensured and improved, the connection reliability and strength of the adjusting structure 322 and the tuning screw 40 after assembly can be ensured and improved, and the service life of the tuning screw 40 can be ensured and improved.

[0089] Please refer to Figure 7 In some embodiments of the present application, the end surface of the tuning screw 40 close to the tuning part 321 is spaced apart from the tuning part 321.

[0090] By adopting the above scheme, the tuning screw 40 is arranged away from the end face of the tuning part 321, so that when the tuning screw 40 rotates relative to the threaded hole 311 and moves towards the cavity 10, the tuning screw 40 does not directly contact and apply force to the tuning part 321, but moves the adjusting structure 322 towards the cavity 10, so as to directly drive the tuning part 321 to plastically deform towards the side close to the cavity 10 through the adjusting structure 322 fixedly connected with the tuning part 321. Based on this, the force received by the tuning part 321 is more uniform and stable, and the tuning is more stable and reliable, which is beneficial to improve the tuning accuracy and efficiency.

[0091] Please refer to Figure 1 , Figure 2 In some embodiments of the present application, the end face of the tuning screw 40 away from the adjusting structure 322 is provided with an adjusting groove 44 for driving the tuning screw 40 to rotate through an external tool. The adjusting groove 44 can be, but is not limited to, a slot, a cross slot, a plus-minus slot, an internal triangular slot, an internal hexagonal slot, a keyhole slot, a keyhole slot, etc., and the present embodiment does not limit this.

[0092] By adopting the above scheme, when the tuning screw 40 needs to be rotated, an external tool such as a screwdriver or an internal hexagonal wrench can be inserted into the adjusting groove 44 to apply force and drive the tuning screw 40 to rotate in the threaded hole 311, thereby effectively ensuring and improving the frequency adjustment convenience.

[0093] Please refer to Figure 1 , Figure 2 In some embodiments of the present application, the tuning screw 40 does not protrude from the protective plate 31 in the first direction z.

[0094] By adopting the above scheme, after adjustment is completed, the tuning screw 40 can be arranged not to protrude from the protective plate 31 in the first direction z, so that the tuning screw 40 is lower than or flush with the surface of the protective plate 31 away from the tuning plate 32 in the first direction z. Based on this, the filter and other products can be simple and beautiful on the side of the protective plate 31, the tuning screw 40 can be basically avoided from colliding with other structures when the filter and other products are assembled with other structures, and the product indicators can be affected, the overall height of the filter and other products can be reduced, the miniaturization and light weight of the filter and other products can be facilitated, the settable volume of the filter and other products can be enlarged under the premise that the installation space reserved for the filter and other products is unchanged, and the performance indicators of the filter and other products can be improved.

[0095] Please refer to Figure 1 Some embodiments of the present application provide a communication device including a filter. In this way, the communication device can have better performance indicators, intermodulation stability and power indicators. The communication device can be a singleplexer, a diplexer, a multiplexer, a combiner, an antenna, a base station, etc.

[0096] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A filter, characterized by, The filter comprises: a cavity; a resonant rod arranged in the cavity; a cover plate covering the cavity, the cover plate comprising a protection plate and a tuning plate connected between the protection plate and the cavity, the tuning plate comprising a tuning portion corresponding to the resonant rod, the tuning portion being provided with an adjusting structure on a side close to the protection plate, the protection plate being provided with a threaded hole penetrating in a first direction and corresponding to the adjusting structure; a tuning screw threadedly connected to the threaded hole, the tuning screw being connected to the adjusting structure, the relative position of the tuning screw and the adjusting structure in the first direction being fixed, the tuning screw being rotatable relative to the adjusting structure, the tuning screw being rotatable to drive the adjusting structure to move in the first direction and thus deform the tuning portion.

2. The filter of claim 1, wherein, An end face of the tuning screw close to the adjusting structure is provided with a limiting groove, the limiting groove extending along the radial direction of the tuning screw and passing through the rotation axis of the tuning screw, at least one end of the limiting groove along its extending direction being communicated to the outside; The adjusting structure is mounted in the limiting groove and is limited to be out of the slot of the limiting groove and located on the rotation axis of the tuning screw.

3. The filter of claim 2, wherein, The adjusting structure comprises a limiting portion in a spherical or cylindrical shape and a connecting portion in a spherical or cylindrical shape connected between the limiting portion and the tuning portion, the projection area of the limiting portion along the first direction being greater than the projection area of the connecting portion along the first direction; The limiting groove comprises a first sub-groove and a second sub-groove arranged in sequence along the groove depth direction of the limiting groove, the connecting portion being mounted in the first sub-groove, and the limiting portion being mounted in the second sub-groove.

4. The filter of claim 1, wherein, An end face of the tuning screw close to the adjusting structure is provided with a limiting hole, the limiting hole extending along the first direction and being located on the rotation axis of the tuning screw; The adjusting structure is embedded in the limiting hole and is limited to be out of the aperture of the limiting hole.

5. The filter of claim 4, wherein, The adjusting structure comprises a limiting portion in a spherical or cylindrical shape and a connecting portion in a spherical or cylindrical shape connected between the limiting portion and the tuning portion, the projection area of the limiting portion along the first direction being greater than the projection area of the connecting portion along the first direction; The limiting hole comprises a first hole segment and a second hole segment arranged in sequence along the hole depth direction of the limiting hole, the connecting portion being mounted in the first hole segment, and the limiting portion being mounted in the second hole segment.

6. The filter of claim 4, wherein, The hole wall of the limiting hole is provided with at least one truncated groove, the truncated groove being communicated to the outside along its extending direction.

7. The filter of any one of claims 1-6, wherein, An end face of the tuning screw close to the tuning portion is spaced apart from the tuning portion.

8. The filter of any one of claims 1-6, wherein, An end face of the tuning screw away from the adjusting structure is provided with an adjusting groove for an external tool to drive the tuning screw to rotate via the adjusting groove.

9. The filter of any one of claims 1-6, wherein, The tuning screw does not protrude from the protection plate in the first direction.

10. A communication device, characterized by The filter comprises any one of claims 1-9.

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