CN218123692U - Coupling adjustment structure, filter and communication equipment - Google Patents

Abstract

The application relates to the field of radio frequency devices, and provides a coupling adjusting structure, a filter and communication equipment. The coupling adjusting structure comprises a fixing piece and a coupling piece, the fixing piece is fixedly installed in the through hole, the fixing piece is provided with a connecting hole which is communicated along the length direction of the fixing piece, and the connecting hole is provided with a threaded hole section; the coupling piece is including connecting portion and coupling portion that connect gradually, and connecting portion threaded connection is in the screw hole section, and coupling portion is kept away from the one end of connecting portion and is worn out the connecting hole and stretch into the cavity of wave filter. Based on the structure, the assembly operation of the coupling adjusting structure can be effectively simplified and facilitated, the assembly convenience and the assembly efficiency of the coupling adjusting structure can be effectively guaranteed and improved, and the coupling adjusting structure can be adjusted simply, conveniently and quickly.

Description

Coupling adjustment structure, filter and communication equipment

Technical Field

The application belongs to the technical field of radio frequency devices, and particularly relates to a coupling adjusting structure, a filter and communication equipment.

Background

A filter may be used to select the communication signal and filter out clutter or interference signals. The coupling adjustment structure of the conventional filter generally includes an adjustment screw threadedly coupled to a threaded hole of the cover plate, and a nut threadedly coupled to the adjustment screw and locking the adjustment screw to the cover plate. Based on this, the assembly convenience of adjusting screw and nut and apron can be relatively poor, assembly efficiency can be relatively low, and adjusting screw's debugging convenience can be relatively poor.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the present application is to provide a coupling adjustment structure, so as to solve the problems of relatively poor assembly convenience, relatively low assembly efficiency, and relatively poor debugging convenience of the conventional coupling adjustment structure.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: a coupling adjusting structure comprises a fixing piece and a coupling piece, wherein the fixing piece is fixedly installed in a through hole, the fixing piece is provided with a connecting hole which is communicated along the length direction of the fixing piece, and the connecting hole is provided with a threaded hole section; the coupling piece is including connecting portion and the coupling portion that connects gradually, connecting portion threaded connection in the screw hole section, the coupling portion is kept away from the one end of connecting portion is worn out the connecting hole stretches into in the cavity of wave filter.

In one embodiment, the connection hole has a smooth hole section connected to the threaded hole section, the smooth hole section has a radial size smaller than a major diameter size of the threaded hole section, the smooth hole section limits the connection portion from passing out of the connection hole therethrough, and one end of the coupling portion, which is far away from the connection portion, passes out of the connection hole through the smooth hole section.

In one embodiment, an end surface of the fixing member remote from the coupling portion is lower than or flush with the aperture of the through hole.

In one embodiment, the fixing part comprises a fixing part and an extending part which are connected in sequence, the fixing part is fixedly installed on the through hole, and the external dimension of the extending part is smaller than that of the fixing part.

In one embodiment, an end surface of the connecting portion, which is far away from the coupling portion, is provided with an adjusting groove, and the adjusting groove is used for an external tool to drive the coupling piece to rotate through the adjusting groove.

In one embodiment, the coupling part is a metal piece;

or, the coupling part is an insulating part, and a part or all of the coupling part is coated with a metal layer.

In one embodiment, the connecting portion and the coupling portion are integrally or separately connected.

An object of the embodiment of the present application is to provide a filter, which includes a cavity, a cover plate covering the cavity, a resonant rod disposed in the cavity, and at least one coupling adjustment structure;

the resonant rod is arranged in the cavity, and the cover plate is provided with the through hole for installing the coupling adjusting structure; or, the resonance rod is installed on the cover plate, and the cavity is provided with the through hole for installing the coupling adjusting structure.

In one embodiment, the coupling adjustment structure is disposed corresponding to the resonance rod for adjusting a resonance frequency;

and/or at least two resonance rods are arranged, and the coupling adjusting structure is arranged between two adjacent resonance rods and is used for adjusting the coupling strength between the two adjacent resonance rods;

and/or, the resonance pole is equipped with at least three, the cavity has the coupling window, coupling adjustment structure locates the coupling window for debug passband outband is restrained.

It is also an object of embodiments of the present application to provide a communication device, comprising the filter.

The application provides a coupling structure is adjusted to beneficial effect lies in:

the coupling adjustment structure that this application embodiment provided, when the equipment, can be with mounting fixed mounting to the through-hole of wave filter casing in, and with the connecting portion threaded connection of coupling part in the screw hole section of the connecting hole of mounting, and wear out the connecting hole with the one end that connecting portion were kept away from to the coupling part and stretch into the cavity of wave filter in order to exert the coupling utility, and the equipment of mounting and coupling part and through-hole is conveniently, swiftly realized, thereby can effectively simplify, the assembly operation of coupling adjustment structure is facilitated, can effectively ensure and improve the assembly convenience and the assembly efficiency of coupling adjustment structure. When the coupling piece is used, the coupling piece can be rotated relative to the fixing piece on the basis that the fixing piece is fixed relative to the through hole, so that the connecting part of the coupling piece moves axially along the threaded hole section, the length and the area of the part, penetrating out of the connecting hole, of the coupling part and extending into the cavity of the filter are changed, the adjustment is further realized, and the adjustment is simple, convenient and quick.

Drawings

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 or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic perspective view of a filter according to an embodiment of the present application;

FIG. 2 isbase:Sub>A partial cross-sectional view along A-A provided in FIG. 1;

fig. 3 is a schematic perspective view of a coupling adjustment structure according to an embodiment of the present application;

FIG. 4 is an exploded schematic view of the coupling adjustment structure provided in FIG. 3;

fig. 5 is a schematic structural diagram of a filter according to a third embodiment of the present application;

fig. 6 is a schematic structural diagram of a filter according to a fourth embodiment of the present application;

fig. 7 is a schematic structural diagram of a filter according to the fifth embodiment of the present application.

Wherein, in the figures, the respective reference numerals:

10-coupling adjustment structure, 11-fixation, 111-connection hole, 1111-threaded hole segment, 1112-unthreaded hole segment, 112-fixation section, 113-extension section, 12-coupling section, 121-connection section, 1211-adjustment groove, 122-coupling section; 13-tuning rod, 14-coupling rod, 15-flying rod; 20-cavity, 21-resonant cavity, 22-coupling window; 30-a cover plate; 40-a resonant rod; 50-through hole.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings only for the convenience of description and simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus, are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

A filter may be used to select the communication signal and filter out clutter or interference signals. The coupling adjustment structure of the conventional filter generally includes an adjustment screw threadedly coupled to a threaded hole of the cover plate, and a nut threadedly coupled to the adjustment screw and locking the adjustment screw to the cover plate. Based on this, the assembly convenience of adjusting screw and nut and apron can be relatively poor, assembly efficiency can be relatively low, and adjusting screw's debugging convenience can be relatively poor.

Therefore, the embodiment of the application provides a coupling adjusting structure, and the problems that the assembly convenience of the existing coupling adjusting structure is relatively poor, the assembly efficiency is relatively low, and the debugging convenience is relatively poor can be solved.

Specific implementations of the present application are described in more detail below with reference to specific embodiments:

example one

Referring to fig. 2, 3 and 4, an embodiment of the present application provides a coupling adjustment structure 10, which includes a fixing member 11 and a coupling member 12, wherein the fixing member 11 is fixedly installed to a through hole 50, the fixing member 11 is provided with a connection hole 111 penetrating along a length direction thereof, and the connection hole 111 is provided with a threaded hole section 1111; the coupling element 12 includes a connecting portion 121 and a coupling portion 122 connected in sequence, the connecting portion 121 is screwed in the threaded hole section 1111, and an end of the coupling portion 122 far from the connecting portion 121 penetrates through the connecting hole 111 and extends into the cavity 20 of the filter.

It should be noted that, referring to fig. 1, the through hole 50 is opened on the filter housing and is used for installing the coupling adjustment structure 10; the through hole 50 may be a circular hole, an elliptical hole, a square hole, a polygonal hole, a special-shaped hole, a unthreaded hole, a tapered hole, a mesa-shaped hole, a stepped hole, or the like, and the shape and the form of the through hole 50 are not limited by the present application, and accordingly, the shape of the fixing member 11 is not limited.

The fixing member 11 of the coupling adjustment structure 10 may be installed in the through hole 50 and may be fixedly installed in the through hole 50 by, but not limited to, being stably connected with the through hole 50 by means of laser welding, interference fit, riveting, etc. The fixing member 11 is provided with a connection hole 111 penetrating along the length direction of the fixing member 11, all or part of the connection hole 111 is a threaded hole section 1111, and the hole wall of the threaded hole section 1111 is provided with internal threads. The coupling member 12 has a connecting portion 121 with an external thread on its outer periphery, and the connecting portion 121 is screwed into the threaded hole section 1111 and is axially movable along the threaded hole section 1111 by rotating relative to the fixing member 11 while the fixing member 11 is fixed relative to the through hole 50. Wherein, the extension length of the thread hole section 1111 can restrict the axial moving stroke of the connection part 121 along the thread hole section 1111.

The axis of the fixing member 11 can coincide with the axis of the connection hole 111, that is, the fixing member 11 can be disposed coaxially with the connection hole 111, and then the coupling member 12 screwed to the connection hole 111 can be disposed coaxially with the fixing member 11, and since the coupling member 12 exerts a coupling effect in the filter, based on this, the mounting position of the coupling member 12 can be located by locating the mounting position of the fixing member 11, thereby avoiding a problem that the position of the coupling member 12 is difficult to be accurately located when the coupling member 12 does not coincide with the axis of the fixing member 11. Of course, in practical applications, the central axis of the fixing member 11 may not coincide with the central axis of the connecting hole 111 according to practical situations.

The coupling portion 122 of the coupling element 12 may be connected to one end of the connection portion 121. One end of the coupling portion 122 away from the connecting portion 121 extends into the filter cavity 20 through the connecting hole 111 for exerting coupling effect. Based on this, when the connection portion 121 of the coupling element 12 moves axially along the threaded hole section 1111 toward the direction close to the coupling portion 122 by rotating relative to the fixing member 11, the portion of the coupling portion 122 protruding into the filter cavity 20 through the connection hole 111 is increased, so that the portion of the coupling portion 122 protruding into the filter cavity 20 through the connection hole 111 is increased in length and area. Conversely, when the connecting portion 121 of the coupling element 12 moves axially along the threaded hole section 1111 in a direction away from the coupling portion 122 by rotating relative to the fixing member 11, the portion of the coupling portion 122 protruding out of the connecting hole 111 into the filter cavity 20 becomes smaller, so that the portion of the coupling portion 122 protruding out of the connecting hole 111 into the filter cavity 20 becomes shorter and smaller in length and area. In the axial moving stroke of the connecting portion 121 along the threaded hole section 1111, the portion of the coupling portion 122 that needs to be inserted into the connecting hole 111 needs to be rod-shaped, and may be, but not limited to, round rod-shaped. The coupling portion 122, which is not required to pass through the connection hole 111, may be, but not limited to, rod-shaped or plate-shaped, and the like.

In summary, the coupling adjustment structure 10 provided in the embodiment of the present application, during assembly, the fixing element 11 can be fixedly installed in the through hole 50 of the filter housing, the connecting portion 121 of the coupling element 12 is screwed into the threaded hole section 1111 of the connecting hole 111 of the fixing element 11, and one end of the coupling portion 122 far away from the connecting portion 121 penetrates through the connecting hole 111 and extends into the filter cavity 20 to exert coupling effect, so that the assembly of the fixing element 11 and the coupling element 12 with the through hole 50 can be conveniently and quickly implemented, thereby effectively simplifying and facilitating the assembly operation of the coupling adjustment structure 10, effectively ensuring and improving the assembly convenience and the assembly efficiency of the coupling adjustment structure 10, and effectively ensuring and improving the production efficiency of the filter adopting the coupling adjustment structure 10. When the filter is used, the coupling element 12 is rotated relative to the fixing element 11 on the basis that the fixing element 11 is fixed relative to the through hole 50, so that the connecting part 121 of the coupling element 12 moves axially along the threaded hole section 1111, and the length and area of the part, extending out of the connecting hole 111, of the coupling part 122 into the filter cavity 20 are changed, thereby realizing adjustment, and being simple and fast.

The coupling adjustment structure 10 provided by the embodiment of the application is particularly suitable for a filter, can be used for adjusting a resonant frequency, or can be used for adjusting coupling strength, or can be used for debugging passband out-of-band rejection, and has excellent usability and wide applicability.

Specifically, as shown in fig. 6, in an application example of the coupling adjustment structure 10, the coupling adjustment structure 10 may be provided corresponding to the resonance lever 40 to serve as the tuning lever 13 for adjusting the resonance frequency. Specifically, the coupling adjustment structure 10 of the tuning rod 13 is configured such that, on the basis that the fixing member 11 is fixed with respect to the through hole 50, the coupling member 12 is rotated with respect to the fixing member 11, so that the connection portion 121 of the coupling member 12 moves axially along the threaded hole section 1111, the length of the portion of the coupling portion 122 protruding out of the connection hole 111 into the filter cavity 20 is changed, the distance of the portion of the coupling portion 122 protruding out of the connection hole 111 into the filter cavity 20 with respect to the resonance rod 40 is changed, and the resonance frequency is adjusted. When the resonant rod 40 has an opening, on the basis that the fixing member 11 is fixed relative to the through hole 50, the coupling member 12 is rotated relative to the fixing member 11, so that the connecting portion 121 of the coupling member 12 moves axially along the threaded hole section 1111, the coupling portion 122 penetrates through the connecting hole 111 and extends into the filter cavity 20, and then can extend into the opening of the resonant rod 40, and as the length of the portion of the coupling portion 122 penetrating through the connecting hole 111 and extending into the filter cavity 20 changes, the depth of the coupling portion 122 extending into the opening of the resonant rod 40 changes, and then the relative area of the portion of the coupling portion 122 extending into the opening of the resonant rod 40 and the inner wall of the resonant rod 40 changes, thereby adjusting the resonant frequency.

As shown in fig. 2, in another application example of the coupling adjustment structure 10, the coupling adjustment structure 10 may be correspondingly disposed between two adjacent resonance bars 40 to serve as the coupling bar 14 for adjusting the coupling strength between the two adjacent resonance bars 40. As the coupling adjustment structure 10 of the coupling rod 14, specifically, after the fixing member 11 is fixed with respect to the through hole 50, the coupling member 12 is rotated with respect to the fixing member 11, so that the connection portion 121 of the coupling member 12 moves axially along the threaded hole section 1111, and the length and the area of the portion of the coupling portion 122 protruding into the filter cavity 20 through the connection hole 111 are changed, so that the length and the area of the portion of the coupling portion 122 coupled between two adjacent resonance rods 40 are changed, and thus the coupling strength between two adjacent resonance rods 40 is adjusted.

In another application example of the coupling adjustment structure 10, as shown in fig. 7, the coupling adjustment structure 10 may be correspondingly disposed at the coupling window 22 to serve as a flying bar 15 for debugging the out-of-band rejection, so that the two resonant bars 40 respectively disposed at both sides of the coupling window 22 form cross-coupling and generate transmission zeros. Specifically, the coupling adjustment structure 10 of the flying bar 15 is configured such that, after the fixing member 11 is fixed to the through hole 50, the coupling member 12 is rotated relative to the fixing member 11, so that the connection portion 121 of the coupling member 12 is moved axially along the threaded hole section 1111, and the length and area of the portion of the coupling portion 122 extending into the filter cavity 20 through the connection hole 111 are changed, and the length and area of the portion of the coupling portion 122 cross-coupled between the two resonance bars 40 on both sides of the coupling window 22 are changed, thereby achieving the adjustment of the out-of-band rejection and the adjustment of the transmission zero point of the filter channel.

In addition, the existing coupling adjusting structure needs to be fastened on the cover plate by means of nuts, the adjusting screws and the nuts need to protrude out of the filter shell, and more space is occupied outside the filter shell, so that the appearance and the structure of the filter are increased, and the miniaturization of the filter is not facilitated. In contrast, the coupling adjustment structure 10 provided in this embodiment can directly realize the connection of the coupling element 12 and stabilize the position and state of the coupling element 12 by the fixing element 11 fixedly installed in the through hole 50, and does not need to use an additional nut for fastening, and naturally does not need to occupy more space outside the filter housing, so that the overall height of the filter can be correspondingly reduced, the shape and structure of the filter can be correspondingly simplified, and the filter can be favorably developed to be miniaturized and light-weighted. On the contrary, under the condition that the space reserved for the filter by the communication equipment is not changed, the volume of the filter can be increased integrally, and the performance index of the filter is improved.

In addition, based on the structural design of the coupling adjustment structure 10 provided in this embodiment, the through hole 50 for installing the coupling adjustment structure 10 can be correspondingly designed as a unthreaded hole, and therefore, compared with the prior art, the machining process for tapping the filter housing to form a threaded hole can be simplified, the machining efficiency of the filter housing provided with the through hole 50 can be effectively improved, and the machining cost of the filter housing provided with the through hole 50 can be effectively reduced.

Referring to fig. 2, in the present embodiment, the connection hole 111 has an unthreaded hole section 1112 connected to the threaded hole section 1111, a radial dimension of the unthreaded hole section 1112 is smaller than a major dimension of the threaded hole section 1111, the unthreaded hole section 1112 restricts the connection portion 121 from passing through the connection hole 111 along the unthreaded hole section 1112, and an end of the coupling portion 122 away from the connection portion 121 passes through the connection hole 111 through the unthreaded hole section 1112.

It should be noted that the threaded hole section 1111 is opened at an end surface of the fixing member 11 far from the coupling portion 122 and is formed to extend along a length direction of the fixing member 11. The unthreaded hole section 1112 is formed at the bottom of the threaded hole section 1111 and extends along the length direction of the fastener 11 until penetrating through the fastener 11.

The major diameter of the thread hole section 1111 refers to the diameter of a virtual cylinder surrounded by roots of the internal threads of the thread hole section 1111. By making the radial dimension of the unthreaded hole section 1112 smaller than the major diameter dimension of the threaded hole section 1111, when the connecting portion 121 moves to the end side of the threaded hole section 1111 near the unthreaded hole section 1112, the external thread of the connecting portion 121 is restricted from entering the unthreaded hole section 1112, so that the connecting portion 121 is restricted from entering the unthreaded hole section 1112, and the connecting portion 121 is restricted from passing out of and coming off the connecting hole 111 along the unthreaded hole section 1112, thereby effectively ensuring and improving the connection reliability between the fixing member 11 and the coupling member 12.

Moreover, even though a few of impurities such as burrs and chips may be generated due to mutual scraping during the rotation of the connection portion 121 in the threaded hole section 1111, the optical hole section 1112 with a relatively small radial size may block the impurities such as the burrs and the chips to a certain extent, so as to reduce the risk that the impurities such as the burrs and the chips fall into the filter along the optical hole section 1112, thereby effectively ensuring and improving the intermodulation and power performance of the filter.

Referring to fig. 1 and fig. 2, in the present embodiment, an end surface of the fixing member 11 away from the coupling portion 122 is lower than or flush with the aperture of the through hole 50.

By adopting the above scheme, through making mounting 11 keep away from the terminal surface of coupling part 122 and be less than or the parallel and level in the drill way of through-hole 50, can effectively reduce the whole height of wave filter, can do benefit to the miniaturization of wave filter, the lightweight, can make the outside of seting up the wave filter casing of through-hole 50 succinct, pleasing to the eye, can basically avoid the coupling to adjust structure 10 and collide other structures and influence the product index when wave filter and other structure assembly, and still can do benefit to the space unchangeable prerequisite of reserving for the wave filter at communication equipment, the volume that can set up of extension wave filter, in order to improve the performance index of wave filter.

Referring to fig. 2, 3 and 4, in the present embodiment, the fixing member 11 includes a fixing portion 112 and an extending portion 113 connected in sequence, the fixing portion 112 is fixedly installed to the through hole 50, and an outer dimension of the extending portion 113 is smaller than an outer dimension of the fixing portion 112.

It should be noted that, when the external shape of the extending portion 113 is the same as the external shape of the fixing portion 112 and is circular, the external size of the extending portion 113 can be smaller than the external size of the fixing portion 112 by making the radial size of the extending portion 113 smaller than the radial size of the fixing portion 112. When the external shape of the extending portion 113 is different from the external shape of the fixing portion 112, the external size of the extending portion 113 can be made smaller than the external size of the fixing portion 112 by making the projection of the fixing portion 112 in the longitudinal direction of the fixing member 11 cover the projection of the extending portion 113 in the longitudinal direction of the fixing member 11, or by making the projection of the fixing portion 112 in the longitudinal direction of the fixing member 11 not coincide with the projection of the extending portion 113 in the longitudinal direction of the fixing member 11.

Thus, by adopting the above-described scheme, the fixing part 112 having a relatively large outer size can be fixedly installed into the through hole 50 to stabilize the installation state of the coupling adjustment structure 10 with respect to the through hole 50 and stabilize the supporting effect of the fixing part 112 on the extension part 113 and the coupling piece 12 installed in the connection hole 111; on the basis, by making the external dimension of the extending portion 113 smaller than the external dimension of the fixing portion 112, the weight of the extending portion 113 can be reduced correspondingly on the basis of ensuring the extending length of the connecting hole 111, particularly the threaded hole section 1111, and the axial moving stroke of the connecting portion 121 through the extending portion 113, so that the weight of the fixing member 11 and the coupling adjustment structure 10 can be reduced correspondingly, which is beneficial to the light weight of the filter; meanwhile, by making the external dimension of the extension portion 113 smaller than the external dimension of the fixing portion 112, interference with a filter element inside the filter due to an excessively large external dimension of the extension portion 113 can be avoided, and secondly, when the extension portion 113 is a metal component, influence on indexes such as frequency and coupling strength of the filter due to an excessively large external dimension of the extension portion 113 can also be avoided.

Referring to fig. 2 and 4, in the present embodiment, an end surface of the connecting portion 121 away from the coupling portion 122 is provided with an adjusting groove 1211, and the adjusting groove 1211 is used for an external tool to drive the coupling element 12 to rotate through the adjusting groove 1211. The adjusting groove 1211 may be, but not limited to, a straight groove, a cross groove, an add-drop groove, an inner triangular groove, an inner hexagonal groove, a quincunx groove, and the like, which is not limited in this embodiment.

By adopting the above-mentioned scheme, when it is necessary to rotate the coupling element 12 relative to the fixing element 11, an external tool such as a screwdriver or an allen key can be inserted into the connection hole 111 and inserted into the adjustment groove 1211 to apply a force and drive the coupling element 12 to rotate relative to the fixing element 11, thereby saving time and effort and achieving the purpose of adjustment.

Of course, in other possible embodiments, the end surface of the connecting portion 121 far from the coupling portion 122 may not be provided with the adjusting groove 1211, for example, when it is required to rotate the coupling member 12 relative to the fixing member 11, it is considered that the connecting portion 121 is magnetically attracted by an external tool extending into the connecting hole 111, so that the coupling member 12 is rotated relative to the fixing member 11 by the rotation of the external tool, thereby achieving the purpose of adjustment.

Referring to fig. 2, fig. 3 and fig. 4, in the present embodiment, the coupling portion 122 is a metal member, or the coupling portion 122 is an insulating member and a portion of the coupling portion 122 is covered with a metal layer, or the coupling portion 122 is an insulating member and the entire coupling portion 122 is covered with a metal layer. By adopting the above scheme, the coupling portion 122 can be ensured to exert effective coupling action.

In addition, the connecting portion 121 may be a metal member or an insulating member, and the fixing member 11 may be a metal member or an insulating member, which is not limited in this embodiment.

Referring to fig. 2, 3 and 4, in the present embodiment, the connecting portion 121 and the coupling portion 122 are integrally connected. When the coupling portion 122 and the connecting portion 121 are both made of metal pieces, they can be integrally formed; when the coupling portion 122 is a metal member and the connection portion 121 is an insulating member, the connection portion 121 and the coupling portion 122 can be integrally connected by, but not limited to, plastic coating, injection molding, and the like.

By integrally connecting the connection part 121 and the coupling part 122, the connection strength between the connection part 121 and the coupling part 122 can be effectively ensured and strengthened, the structural strength and the usability of the coupling element 12 can be ensured and improved, and the service life of the coupling element 12 and the coupling adjustment structure 10 can be ensured and prolonged.

Referring to fig. 1 and fig. 2, an embodiment of the present invention further provides a filter, which includes a cavity 20, a cover plate 30 covering the cavity 20, a resonant rod 40 disposed in the cavity 20, and at least one coupling adjustment structure 10; the resonant bar 40 is mounted to the cavity 20, and the cover plate 30 is provided with a through hole 50 for mounting the coupling adjusting structure 10.

It should be noted that the cavity 20 has a resonant cavity 21, a resonant rod 40 is disposed in the resonant cavity 21, and the resonant rod 40 is connected to the cavity 20 and disposed opposite to and corresponding to the cover plate 30. The resonant rod 40 can be connected to the cavity 20 by an integral connection, welding, crimping, riveting, clamping, screw fastening, or screwing, which is not limited in this embodiment.

Wherein, the resonant rod 40 can be a metal resonant rod, a ceramic dielectric resonant rod or a dielectric resonant rod made of other materials; the resonant rod 40 can be a columnar resonant rod, a sheet metal part resonant rod or other types of resonant rods; the resonant rod 40 can be a circular rod, a polygonal rod, a special-shaped rod or even other resonant rods; the resonant rods 40 may or may not have resonant disks; the resonant disk can be provided with a flanging or not; the resonant rod 40 may be a hollow resonant rod or a solid resonant rod; and the like, which are not limited by the embodiment.

It should be noted that the cover plate 30 covers the cavity 20 to implement a shielding function to prevent signal leakage. The cover plate 30 is provided with a through hole 50 which is arranged in an equal amount with the coupling adjustment structure 10 and is used for installing the coupling adjustment structure 10. The coupling adjustment structure 10 can be fixedly mounted to the through hole 50 by the fixing member 11, and the length and area of the portion of the coupling part 122 penetrating through the connection hole 111 can be adjusted by rotating the coupling member 12 relative to the fixing member 11, thereby achieving the adjustment purpose. The cover plate 30 may be a single-layer cover plate, a double-layer cover plate, or even a multi-layer cover plate, which is not limited in this embodiment.

Referring to fig. 2, in the present embodiment, at least two resonant rods 40 are provided, and the coupling adjustment structure 10 is provided between two adjacent resonant rods 40 for adjusting the coupling strength between two adjacent resonant rods 40.

Specifically, in an application example, the coupling adjustment structure 10 may be correspondingly disposed between two adjacent resonance bars 40 to serve as the coupling bar 14 for adjusting the coupling strength between the two adjacent resonance bars 40. Specifically, the coupling adjustment structure 10 of the coupling rod 14 is configured such that, on the basis that the fixing member 11 is fixed with respect to the through hole 50, the coupling member 12 is rotated with respect to the fixing member 11, so that the connection portion 121 of the coupling member 12 moves axially along the threaded hole section 1111, the length and the area of the portion of the coupling portion 122 protruding into the filter cavity 20 through the connection hole 111 are changed, the length and the area of the portion of the coupling portion 122 coupled between two adjacent resonance rods 40 are changed, and the coupling strength between two adjacent resonance rods 40 is adjusted.

Referring to fig. 1, an embodiment of the present application further provides a communication device including a filter. By adopting the filter, the communication equipment has higher production efficiency, can be miniaturized and lightened, and can realize higher performance index. The communication device may be, but is not limited to, a multiplexer, a duplexer, a multiplexer, a combiner, an antenna, a base station, and the like.

Example two

The difference between this embodiment and the first embodiment is:

referring to fig. 2 and 4, in the present embodiment, the connecting portion 121 and the coupling portion 122 are separately connected. The connection portion 121 and the coupling portion 122 can be separately connected together by, but not limited to, inserting, clamping, split welding, and split bonding.

By connecting the connection part 121 and the coupling part 122 separately, the connection part 121 and the coupling part 122 can be formed separately conveniently and conveniently; the sequence of the assembling process of the connecting part 121 and the connecting hole 111 and the assembling process of the connecting part 121 and the coupling part 122 can be adjusted flexibly as required, different connecting parts 121 and coupling parts 122 can be selected conveniently as required for assembly, and the assembly convenience and the connection strength of the connecting part 121, the coupling parts 122 and the connecting hole 111 can be guaranteed.

EXAMPLE III

The difference between this embodiment and the first embodiment is:

referring to fig. 5, in the present embodiment, the resonant rod 40 is mounted on the cover plate 30, and the cavity 20 is provided with a through hole 50 for mounting the coupling adjustment structure 10.

It should be noted here that the cavity 20 has a resonant cavity 21, and a resonant rod 40 is disposed in the resonant cavity 21. The cover plate 30 covers the cavity 20 to realize a shielding function and prevent signal leakage.

The resonant rod 40 is connected to the cover plate 30, and the cavity 20 is provided with a through hole 50 which is arranged in an equal amount to the coupling adjustment structure 10 and is used for installing the coupling adjustment structure 10. The coupling adjustment structure 10 can be fixedly mounted to the through hole 50 by the fixing member 11, and the length and area of the portion of the coupling portion 122 penetrating through the connection hole 111 can be adjusted by rotating the coupling member 12 relative to the fixing member 11, thereby achieving the adjustment purpose.

Example four

Referring to fig. 6, in the present embodiment, the coupling adjustment structure 10 is disposed corresponding to the resonant rod 40 for adjusting the resonant frequency.

Specifically, in an application example, the coupling adjustment structure 10 may be disposed corresponding to the resonance rod 40 to serve as the tuning rod 13 for adjusting the resonance frequency. Specifically, the coupling adjustment structure 10 of the tuning rod 13 is configured such that, on the basis that the fixing member 11 is fixed with respect to the through hole 50, the coupling member 12 is rotated with respect to the fixing member 11, so that the connection portion 121 of the coupling member 12 moves axially along the threaded hole section 1111, the length of the portion of the coupling portion 122 protruding out of the connection hole 111 into the filter cavity 20 is changed, the distance of the portion of the coupling portion 122 protruding out of the connection hole 111 into the filter cavity 20 with respect to the resonance rod 40 is changed, and the resonance frequency is adjusted. When the resonant rod 40 has an opening, on the basis that the fixing member 11 is fixed relative to the through hole 50, the coupling member 12 is rotated relative to the fixing member 11, so that the connecting portion 121 of the coupling member 12 moves axially along the threaded hole section 1111, the coupling portion 122 penetrates through the connecting hole 111 and extends into the filter cavity 20, and then can extend into the opening of the resonant rod 40, and as the length of the portion of the coupling portion 122 penetrating through the connecting hole 111 and extending into the filter cavity 20 changes, the depth of the coupling portion 122 extending into the opening of the resonant rod 40 changes, and then the relative area of the portion of the coupling portion 122 extending into the opening of the resonant rod 40 and the inner wall of the resonant rod 40 changes, thereby adjusting the resonant frequency.

EXAMPLE five

Referring to fig. 7, in the present embodiment, at least three resonant rods 40 are provided, the cavity 20 has a coupling window 22, and the coupling adjustment structure 10 is disposed on the coupling window 22 for tuning out-of-band rejection.

Specifically, in an application example, the coupling adjustment structure 10 can be correspondingly disposed at the coupling window 22 to serve as a flying bar 15 for debugging the out-of-band rejection, so that cross-coupling is formed between two resonant bars 40 respectively disposed at two sides of the coupling window 22 and transmission zeros are generated. Specifically, the coupling adjustment structure 10 of the flying bar 15 is configured such that, after the fixing member 11 is fixed to the through hole 50, the coupling member 12 is rotated relative to the fixing member 11, so that the connection portion 121 of the coupling member 12 is moved axially along the threaded hole section 1111, and the length and area of the portion of the coupling portion 122 extending into the filter cavity 20 through the connection hole 111 are changed, and the length and area of the portion of the coupling portion 122 cross-coupled between the two resonance bars 40 on both sides of the coupling window 22 are changed, thereby achieving the adjustment of the out-of-band rejection and the adjustment of the transmission zero point of the filter channel.

Referring to fig. 2, fig. 6, and fig. 7, in the present embodiment, the coupling adjustment structure 10 as the tuning rod 13, the coupling adjustment structure 10 as the coupling rod 14, and the coupling adjustment structure 10 as the flying rod 15 may be components of the same structure, that is, the same coupling adjustment structure 10 may be used as the tuning rod 13, the coupling rod 14, or the flying rod 15 as needed. Based on this, the filter may employ a plurality of coupling adjustment structures 10 as the tuning rod 13, the coupling rod 14, or the flying rod 15, respectively, and may achieve adjustment of the corresponding index by rotating the coupling element 12 of the corresponding coupling adjustment structure 10, that is, may achieve adjustment of the resonance frequency by rotating the coupling element 12 of the coupling adjustment structure 10 as the tuning rod 13, may achieve adjustment of the coupling strength between the two resonance rods 40 by rotating the coupling element 12 of the coupling adjustment structure 10 as the coupling rod 14, and may achieve out-of-band rejection of the tuning passband by rotating the coupling element 12 of the coupling adjustment structure 10 as the flying rod 15.

The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application should be included in the present application.

Claims (10)

1. A coupling adjusting structure is characterized by comprising a fixing piece and a coupling piece, wherein the fixing piece is fixedly installed on a through hole, the fixing piece is provided with a connecting hole which is communicated along the length direction of the fixing piece, and the connecting hole is provided with a threaded hole section; the coupling piece is including connecting portion and the coupling portion that connects gradually, connecting portion threaded connection in the screw hole section, the coupling portion is kept away from the one end of connecting portion is worn out the connecting hole stretches into in the cavity of wave filter.

2. The coupling adjustment structure of claim 1, wherein the connection aperture has an aperture section connected to the threaded aperture section, the aperture section having a radial dimension less than a major diameter dimension of the threaded aperture section, the aperture section restricting the connection portion from passing therethrough out of the connection aperture, an end of the coupling portion distal from the connection portion passing through the aperture section and out of the connection aperture.

3. The coupling adjustment structure of claim 1, wherein an end surface of the fixing member remote from the coupling portion is lower than or flush with an aperture of the through hole.

4. The coupling adjustment structure of claim 1, wherein the fixing member includes a fixing portion and an extension portion connected in sequence, the fixing portion being fixedly mounted to the through hole, the extension portion having an outer dimension smaller than that of the fixing portion.

5. The coupling adjustment structure of claim 1, wherein an end surface of the connecting portion away from the coupling portion is provided with an adjustment groove for allowing an external tool to rotate the coupling member via the adjustment groove.

6. The coupling adjustment structure according to any one of claims 1 to 5, wherein the coupling portion is a metal member;

or the coupling part is an insulating piece, and a part or all of the coupling part is coated with a metal layer.

7. The coupling adjustment structure according to any one of claims 1 to 5, wherein the connection part and the coupling part are integrally connected or separately connected.

8. A filter, comprising a cavity, a cover plate covering the cavity, a resonant rod arranged in the cavity, and at least one coupling adjustment structure according to any one of claims 1 to 7;

the resonant rod is arranged in the cavity, and the cover plate is provided with the through hole for installing the coupling adjusting structure; or, the resonance rod is installed on the cover plate, and the cavity is provided with the through hole for installing the coupling adjusting structure.

9. The filter of claim 8, wherein the coupling adjustment structure is disposed in correspondence with the resonance rod for adjusting a resonance frequency;

and/or at least two resonance rods are arranged, and the coupling adjusting structure is arranged between two adjacent resonance rods and is used for adjusting the coupling strength between the two adjacent resonance rods;

and/or at least three resonant rods are arranged, the cavity is provided with a coupling window, and the coupling adjusting structure is arranged at the coupling window and used for debugging out-of-band rejection.

10. A communication device comprising a filter according to claim 8 or 9.

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