CN215771477U

CN215771477U - Coupling adjustment mechanism, filter, duplexer, multiplexer and communication equipment

Info

Publication number: CN215771477U
Application number: CN202121580194.9U
Authority: CN
Inventors: 钟志波; 刘望
Original assignee: Anhui Tatfook Technology Co Ltd
Current assignee: Anhui Tatfook Technology Co Ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2022-02-08
Anticipated expiration: 2031-07-08

Abstract

The coupling adjusting mechanism is used for the filter and comprises a supporting clamping seat and a coupling piece, wherein the supporting clamping seat is rotatably connected to a cover plate of the filter, the coupling piece is connected with the supporting clamping seat and is arranged between two resonance tubes of the filter, and the supporting clamping seat is used for rotating under the action of external force and driving the coupling piece to rotate so as to adjust the coupling amount between the resonance tubes. The utility model cancels the coupling screw rod of the traditional cavity filter and the threaded hole on the cover plate, thereby avoiding the influence of factors such as burrs, scraps and the like generated when the coupling screw rod is matched with the threaded hole on the intermodulation performance and high-power index of the cavity filter, improving the intermodulation performance and high-power performance of products, simultaneously improving the production passing rate of the products, reducing the rejection rate and maintenance cost of the products and further improving the market competitiveness of the products.

Description

Coupling adjustment mechanism, filter, duplexer, multiplexer and communication equipment

Technical Field

The present invention relates to the field of communication equipment technologies, and in particular, to a coupling adjustment mechanism, a filter, a duplexer, a multiplexer, and communication equipment.

Background

The cavity filter is widely applied to the field of communication as a frequency selection device, in particular to the field of radio frequency communication. In a base station, a filter is used to select a communication signal and filter out clutter or interference signals outside the frequency of the communication signal.

The traditional cavity coaxial filter mainly comprises a cavity, a cover plate, a resonance rod, a tuning screw rod, a coupling screw rod, a window and a connector. The cavity, the window and the coupling screw form a coupling mechanism of the cavity filter, wherein the coupling screw is longer in length inside the cavity, the coupling amount is larger, and the coupling amount is smaller. The traditional structure is owing to adopt the coupling screw rod, need set up the screw hole on the apron and use with the coupling screw rod cooperation, at coupling screw rod and screw hole complex in-process, inevitably can produce burr and piece etc. have reduced the intermodulation performance and the power performance of wave filter.

SUMMERY OF THE UTILITY MODEL

The utility model provides a coupling adjusting mechanism capable of improving intermodulation performance, high-power performance and product passing rate of a product, and a filter, a duplexer, a multiplexer and communication equipment adopting the coupling adjusting mechanism.

In a first aspect, there is provided a coupling adjustment mechanism for a filter, comprising: the coupling piece is arranged between the two resonance tubes of the filter, and the supporting clamping seat is used for rotating under the action of external force and driving the coupling piece to rotate so as to adjust the coupling amount between the resonance tubes.

In a first possible implementation manner of the first aspect, the cover plate is provided with a through hole, and the support card seat includes a clamping portion elastically clamped in the through hole, and a connecting portion connected to the clamping portion and used for connecting the coupling element.

In a second possible implementation manner of the first aspect, the coupling element and the support clamping seat are connected and fixed together by clamping, or the coupling element and the support clamping seat are connected and fixed together by an embedded integrated injection molding process.

In a third possible implementation manner of the first aspect, the coupling member is U-shaped, square-shaped, concave-shaped, square-cylindrical, or square-shaped with a notch.

In a fourth possible implementation manner of the first aspect, the coupling adjustment mechanism further includes an adjustment portion disposed on the support socket and configured to rotate the support socket.

In a fifth possible implementation manner of the first aspect, the coupling element is made of a conductive metal material, or the coupling element is made of a non-conductive material, and a surface of the non-conductive material is treated by a metallization process to achieve surface conductivity.

In a second aspect, there is provided a filter comprising a resonant cavity having a resonant cavity and an open end, a cover plate covering the open end and connected to the resonant cavity, at least two resonator tubes located in the resonant cavity, and a coupling adjustment mechanism as described in the first aspect above.

In a second aspect, a duplexer is provided, which includes a transmit channel filter and a receive channel filter, where the transmit channel filter and the receive channel filter use the filter provided in the second aspect to perform filtering.

In a fourth aspect, a multiplexer is provided, which includes a plurality of transmit channel filters and a plurality of receive channel filters, and the transmit channel filters and the receive channel filters use the filter provided in the second aspect for filtering.

In a fifth aspect, a communication device is provided, which includes at least one filter provided in the first aspect.

According to the coupling adjustment mechanism of the first aspect provided by various embodiments, the support clamping seat is rotatably connected to the cover plate, so that the support clamping seat rotates under the action of external force and drives the coupling piece to rotate, the coupling amount between the resonance tubes is adjusted, and the coupling screw rod of the traditional cavity filter and the threaded hole in the cover plate are cancelled and replaced, thereby avoiding the influence of factors such as burrs, chips and the like generated when the coupling screw rod is matched with the threaded hole on the intermodulation performance and high-power index of the cavity filter, improving the intermodulation performance and high-power performance of products, simultaneously improving the production throughput of the products, reducing the rejection rate and maintenance cost of the products, and further improving the competitiveness of the product market.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 invention, 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 cross-sectional view of a filter according to a first embodiment of the present invention;

fig. 2 is a top view of a filter according to a first embodiment of the present invention;

fig. 3 is a structural view of a coupling member provided in accordance with a first embodiment of the present invention rotated by 0 degrees;

fig. 4 is a structural view of a coupling member provided in accordance with a first embodiment of the present invention rotated 45 degrees;

fig. 5 is a structural view of a coupling member provided in accordance with a first embodiment of the present invention rotated 90 degrees;

fig. 6 is a perspective view showing a coupling member according to a first embodiment of the present invention;

fig. 7 is a perspective view of a coupling member according to a second embodiment of the present invention;

fig. 8 is a perspective view of a coupling member according to a third embodiment of the present invention;

fig. 9 is a perspective view of a coupling member according to a fourth embodiment of the present invention;

fig. 10 is a perspective view of a coupling member according to a fifth embodiment of the present invention;

fig. 11 is a perspective view showing a coupling member according to a sixth embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

10. a resonant cavity; 101. a resonant cavity; 20. a cover plate; 21. a groove; 22. an annular boss; 23. a through hole; 30. a resonant tube; 40. a coupling adjustment mechanism; 41. supporting the card holder; 411. a clamping part; 412. a connecting portion; 42. a coupling member; 43. an adjusting portion; 50. a window; 60. an adjustment mechanism; 61. a support cover plate; 62. adjusting a rod; 63. and adjusting the nut.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention 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 the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the utility model.

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 invention, "a plurality" means two or more unless specifically defined otherwise.

Please refer to fig. 1 and fig. 2, which are block diagrams of a filter according to a first embodiment of the present invention. The filter of the utility model is particularly suitable for cavity filters. The filter includes a resonant cavity 10, a cover plate 20, and a resonant tube 30. Further, the filter further includes a coupling adjustment mechanism 40.

The resonant cavity 10 is a metal cavity, the resonant cavity 10 may be a metal cavity or a cavity with at least a metalized inner surface, and has a resonant cavity 101 and an open end, the resonant cavity 10 may include at least two resonant cavities 101, at least two resonant cavity 101 supports are separated by a window 50, and one resonant tube 30 is disposed in each resonant cavity 101. The cover plate 20 covers the opening end and is connected with the resonant cavity 10, and the cover plate 20 and the resonant cavity 10 can be connected by screws or the like.

The resonator tubes 30 are located within the resonant cavity 10. In this embodiment, the resonator tubes 30 may be integrally formed with the resonator chamber 10, i.e. the resonator tubes 30 are integrally formed on the inner side of the bottom of the resonator chamber 10. In other embodiments, the resonator tubes 30 may be separate components and fixedly connected to the resonator chamber 10 by fixing elements.

The coupling adjustment mechanism 40 is disposed on the cover plate 20 and located in the window 50. In the present embodiment, the coupling adjustment mechanism 40 includes a support cassette 41 and a coupling member 42. The support clamping seat 41 is rotatably connected to the cover plate 20, and the coupling member 42 is connected to the support clamping seat 41. The coupling element 42 is disposed between two resonator tubes 30, and the support clamping seat 41 is configured to rotate under an external force and drive the coupling element 42 to rotate, so as to adjust a coupling amount between the resonator tubes 30. Specifically, during the rotation of the coupling element 42, the coupling distance and the coupling area between the coupling element and the resonator tubes 30 are changed, and the coupling amount between the resonator tubes 30 is changed by rotating the coupling element 42, so as to adjust the coupling amount of the filter.

Referring to fig. 3, a structural diagram of the coupling element 42 according to the first embodiment of the present invention when the coupling element 42 rotates by 0 degree is shown, where when the coupling element 42 rotates by 0 degree, the coupling amount of the filter reaches a limit; referring to fig. 4, a structural diagram of the coupling element 42 according to the first embodiment of the present invention when the coupling element 42 rotates by 45 degrees is shown, where when the coupling element 42 rotates by 45 degrees, the coupling amount of the filter does not reach a limit; referring to fig. 5, a structural diagram of the coupling element 42 according to the first embodiment of the present invention when the coupling element 42 rotates 90 degrees is shown, and when the coupling element 42 rotates 90 degrees, the coupling amount of the filter reaches a limit. During the rotation of the coupling element 42, the coupling distance and the coupling area between the coupling element 42 and the resonator tubes 30 are changed, so that the coupling amount of the filter is changed.

The filter provided by the embodiment is connected to the cover plate 20 by rotating the supporting clamping seat 41, so that the supporting clamping seat 41 rotates under the action of external force and drives the coupling piece 42 to rotate, the coupling amount between the resonance tubes 30 is adjusted, the coupling screw rod of the traditional cavity filter and the threaded hole in the cover plate 20 are cancelled and replaced, the intermodulation performance and the high-power index of the cavity filter are prevented from being influenced by the factors such as burrs, chips and the like generated when the coupling screw rod is matched with the threaded hole, the intermodulation performance and the high-power performance of a product can be improved, meanwhile, the production throughput of the product can be improved, the rejection rate and the maintenance cost of the product are reduced, and the competitiveness of the product market is further improved.

In one embodiment, the cover plate 20 has a through hole 23, and the supporting socket 41 includes a clamping portion 411 and a connecting portion 412. The clamping portion 411 is elastically clamped in the through hole 23, and the connecting portion 412 is connected to the clamping portion 411 and is used for connecting the coupling element 42. In this embodiment, the locking portion 411 itself has elasticity, and is locked in the through hole 23 to realize self-locking; when an external force acts on the engaging portion 411, it can rotate relative to the cover plate 20, and further drive the coupling element 42 to rotate. The inner wall of the through hole 23 is smooth, and burrs and chips are not generated when the clamping portion 411 is matched with the through hole 23.

In an embodiment, the locking portion 411 is claw-shaped, and the locking portion 411 includes a cylindrical column portion and a hook portion protruding outward along the circumferential direction of the column portion, the through hole 23 is step-shaped, and the hook portion abuts against the step of the through hole 23 to prevent the locking portion 411 from displacing along the axial direction of the through hole 23. In this embodiment, the locking portion 411 has a through hole penetrating through the locking portion 411, so that it has elasticity. In other embodiments, the clip portion 411 may have other structures with elasticity.

In one embodiment, the inner wall of the through hole 23 near one end of the connecting portion 412 is a slope, and the connecting portion 412 has a protrusion, and the protrusion cooperates with the slope to seal the resonant cavity 10.

In one embodiment, the coupling member 42 and the support clamping seat 41 are fixedly connected together by clamping. In another embodiment, the coupling member 42 and the support clamping seat 41 are fixedly connected together through an embedded integral injection molding process, so as to simplify the structure and process and reduce the cost.

In one embodiment, the coupling adjustment mechanism 40 further includes an adjustment portion 43, and the adjustment portion 43 is disposed on the support socket 41 and is used for rotating the support socket 41. In the present embodiment, by providing the adjusting portion 43 at an end of the support cartridge 41 away from the coupling member 42, the force is transmitted to the support cartridge 41 through the adjusting portion 43, so that the external force is applied to the support cartridge 41. Specifically, the adjusting portion 43 may be a screw, one end of which is inserted into a through hole of the claw-shaped clamping portion 411 and is in interference fit with the through hole.

In one embodiment, the support socket 41 is made of plastic, and the coupling member 42 is made of conductive metal material. In another embodiment, the support socket 41 is made of plastic, and the coupling member 42 is made of a non-conductive material, such as plastic or ceramic, and in this embodiment, the surface of the non-conductive material is treated by a metallization process for the purpose of surface conduction.

Referring to fig. 6, a perspective view of a coupling component 42 according to a first embodiment of the present invention is shown. In this embodiment, the coupling member 42 has a U shape, the bottom of the U-shaped coupling member 42 is connected to the connecting portion 412 of the support socket 41, and two ends of the U-shaped coupling member 42 extend toward the bottom of the resonant cavity 10.

Referring to fig. 7, a perspective view of a coupling component 42 according to a second embodiment of the present invention is shown. In the present embodiment, the coupling member 42 is a square-shaped coupling member 42, and one side of the square-shaped coupling member 42 is connected to the connecting portion 412 of the support socket 41.

Fig. 8 is a perspective structural view of a coupling element 42 according to a third embodiment of the present invention. In the present embodiment, the coupling member 42 has a square cylindrical shape, and one end of the square cylindrical coupling member 42 is connected to the connecting portion 412 of the support socket 41, and the other end extends toward the bottom of the resonant cavity 10.

Referring to fig. 9, a perspective view of a coupling component 42 according to a fourth embodiment of the present invention is shown. In the present embodiment, the coupling member 42 has a square shape, and one side of the square-shaped coupling member 42 is connected to the connecting portion 412 of the support holder 41.

Referring to fig. 10, a perspective view of a coupling component 42 according to a fifth embodiment of the present invention is shown. In the present embodiment, the coupling member 42 has a concave shape, a bottom of the concave coupling member 42 is connected to the connecting portion 412 of the support holder 41, and an opening of the concave coupling member 42 faces a bottom of the resonant cavity 10.

Referring to fig. 11, a perspective view of a coupling component 42 according to a sixth embodiment of the present invention is shown. In the present embodiment, the coupling member 42 has a shape of a square with a notch, and the notch of the coupling member 42 is connected to the connecting portion 412 of the support socket 41.

It will be appreciated that in other embodiments, the shape of the coupling member 42 may be other than the shapes described above, provided that the amount of coupling can be varied during rotation.

In one embodiment, the filter further comprises an adjustment mechanism 60. The cover plate 20 is a deformable cover plate, that is, the cover plate 20 can deform under the action of external force, and the adjusting mechanism 60 is disposed on the cover plate 20.

In this embodiment, the cover plate 20 is continuously deformed by the adjusting mechanism 60, so that the distance between the cover plate 20 and the resonator tube 30 is adjustable. Specifically, a groove 21 is formed in a side of the cover plate 20 facing away from the resonator tube 30, the adjusting mechanism 60 is disposed in the groove 21, and the adjusting mechanism 60 is configured to provide an acting force along an axial direction of the resonator tube 30, so that a bottom of the groove 21 is continuously deformed to adjust a distance between the cover plate 20 and the resonator tube 30, and further adjust a resonant frequency of the filter.

On one hand, the purpose of the groove 21 is to make the thickness of the deformed portion of the cover plate 20 smaller, so that the cover plate 20 can be deformed by the adjusting mechanism 60 with a smaller external force, and the adjustability and tuning sensitivity of the filter can be improved; on the other hand, the overall height of the filter can be reduced, and the miniaturization and thinning of the filter are facilitated.

In the present embodiment, the continuous deformation of the cover plate 20 may include a continuous deformation of the cover plate 20 towards the resonator tubes 30, in which case the distance between the cover plate 20 and the resonator tubes 30 is continuously reduced; the continuous deformation of the cover plate 20 also comprises a continuous deformation of the cover plate 20 in a direction away from the resonator tubes 30, wherein the distance between the cover plate 20 and the resonator tubes 30 continuously increases.

In the present embodiment, the resonator tube 30 faces the cover plate 20, a plate capacitor C is formed between the cover plate 20 and the resonator tube 30, the frequency property of the filter is changed by changing the size of the plate capacitor C, and the size of the plate capacitor C is related to the distance between the cover plate 20 and the resonator tube 30. Therefore, the resonance frequency of the filter is changed by changing the distance between the cover plate 20 and the resonator tube 30. The filter has a resonant frequency calculation formula of F1/2 pi sqrt (L C), where F is the resonant frequency, pi is a constant, L is an inductance, and the larger the plate capacitance C, the lower the resonant frequency F, the smaller the plate capacitance C, and the higher the resonant frequency F.

In the filter provided by the present embodiment, the groove 21 is formed on one side of the cover plate 20 facing away from the resonant cavity 101, and the adjusting mechanism 60 is disposed in the groove 21, the adjustment mechanism 60 is adapted to provide a force in the axial direction of the resonator tube 30, continuously deforming the bottom of the recess 21 to adjust the distance between the cover plate 20 and the resonator tube 30, thereby adjusting the resonant frequency of the filter, and thus, the present embodiment eliminates the tuning screw and the screw hole on the cover plate 20 of the conventional cavity filter, thereby avoiding the influence of factors such as burrs and scraps generated when the tuning screw rod is matched with the threaded hole on the intermodulation performance and high-power index of the cavity filter, improving the intermodulation performance and high-power performance of products, meanwhile, the production passing rate of the product can be improved, the rejection rate of the product and the maintenance cost are reduced, and the market competitiveness of the product is improved.

In one embodiment, the adjustment mechanism 60 includes a support cover 61, an adjustment rod 62, and an adjustment nut 63. The supporting cover plate 61 is arranged at an opening of the groove 21, one end of the adjusting rod 62 penetrates through the supporting cover plate 61 and is fixedly connected with the bottom of the groove 21, the adjusting nut 63 is sleeved outside the adjusting rod 62, the adjusting nut 63 is located on one side, back to the groove 21, of the supporting cover plate 61, an external thread extending along the axial direction of the adjusting rod 62 is formed in the outer surface of the adjusting rod 62, and the external thread is used for being matched with the adjusting nut 63.

In the present embodiment, in order to limit the axial displacement of the support cover plate 61, an annular boss 22 is formed at the opening of the recess 21, and the edge of the support cover plate 61 abuts on the annular boss 22. Specifically, the groove 21 is circular, and a through hole with a diameter larger than that of the groove 21 is formed at the opening of the groove 21 by expanding outward in the radial direction, so that the annular boss 22 is conveniently formed at the opening of the groove 21, the bottom edge of the support cover plate 61 abuts against the annular boss 22, and the side surface of the support cover plate 61 abuts against the side surface of the groove 21 adjacent to the annular boss 22.

In this embodiment, when the adjusting nut 63 is rotated under the action of an external force, since the supporting cover plate 61 limits the displacement of the adjusting nut 63 in the direction approaching the resonator tube 30, a reaction force is applied to the adjusting rod 62, so that the adjusting rod 62 is displaced in the direction away from the resonator tube 30, and the bottom of the groove 21 fixedly connected thereto is driven to deform in the direction away from the resonator tube 30, so that the distance between the resonator tube 30 and the cover plate 20 is continuously increased.

In the present embodiment, the axial displacement of the supporting cover plate 61 in the direction away from the resonator tubes 30 may or may not be limited. When the distance between the cover plate 20 and the resonator tube 30 needs to be continuously decreased, i.e. the cover plate 20 needs to be deformed in a direction approaching the resonator tube 30, the adjusting nut 63 can be loosened, and a downward acting force is applied to the adjusting rod 62, so that the cover plate 20 is deformed in a direction approaching the resonator tube 30.

In another embodiment, the adjustment mechanism 60 includes a support cover 61, an adjustment rod 62, and an adjustment nut 63. The supporting cover plate 61 is arranged at an opening of the groove 21, one end of the adjusting rod 62 penetrates through the supporting cover plate 61 and is fixedly connected with the bottom of the groove 21, the adjusting nut 63 is sleeved outside the adjusting rod 62, the adjusting nut 63 is located on one side, facing away from the groove 21, of the supporting cover plate 61, an external thread extending along the axial direction of the adjusting rod 62 is formed in the outer surface of the adjusting rod 62, and the external thread is used for being matched with the adjusting nut 63.

In the present embodiment, the support cover plate 61 is rotatable around the adjustment rod 62, the adjustment nut 63 is fixedly connected to the support cover plate 61, and the support cover plate 61 is rotatable together with the adjustment nut 63, for example, the adjustment nut 63 is fixedly connected to the support cover plate 61 by welding or bonding.

In order to limit the axial displacement of the supporting cover plate 61, a limiting structure for limiting the displacement of the supporting cover plate 61 along the axial direction of the adjusting rod 62 is arranged at the opening of the groove 21. Specifically, the limiting structure may be an annular groove, and the edge of the supporting cover plate 61 is clamped in the annular groove and can rotate in the annular groove. Preferably, the recess 21 is circular, and the support cover 61 is also circular to facilitate the rotation of the support cover 61. In order to facilitate the detachment and installation of the supporting cover plate 61, the annular groove may be formed by the annular boss 22 and a limiting block or a limiting ring arranged at the opening of the groove 21.

In this embodiment, when the adjusting nut 63 is rotated in a first direction by an external force, the supporting cover plate 61 rotates along with the adjusting nut 63, and since the axial displacement of the supporting cover plate 61 is limited, the axial displacement of the adjusting nut 63 is also limited, a reaction force is applied to the adjusting rod 62, so that the adjusting rod 62 is displaced in a direction away from the resonator tube 30, and the bottom of the groove 21 fixedly connected thereto is driven to deform in a direction away from the resonator tube 30, so that the distance between the resonator tube 30 and the cover plate 20 continuously increases; when the adjusting nut 63 is rotated in a second direction opposite to the first direction under the action of an external force, the supporting cover plate 61 rotates along with the adjusting nut 63, and since the axial displacement of the supporting cover plate 61 is limited, the axial displacement of the adjusting nut 63 is also limited, a reaction force is applied to the adjusting rod 62, so that the adjusting rod 62 is displaced in a direction close to the resonator tube 30, and the bottom of the groove 21 fixedly connected with the adjusting rod is driven to deform in a direction close to the resonator tube 30, so that the distance between the resonator tube 30 and the cover plate 20 is continuously reduced.

An embodiment of the present invention further provides a duplexer, where the duplexer includes: the filter comprises a transmitting channel filter and a receiving channel filter, wherein the transmitting channel filter and the receiving channel filter adopt the filters for filtering. The transmitting channel filter is used for processing a transmitting signal of a transmitter, and the receiving channel filter is used for processing a receiving signal of a receiver.

The embodiment of the utility model also provides a multiplexer, wherein the multiplexer comprises a plurality of transmitting channel filters and a plurality of receiving channel filters, and the transmitting channel filters and the receiving channel filters adopt the filters for filtering. The transmitting channel filter is used for processing a transmitting signal of a transmitter, and the receiving channel filter is used for processing a receiving signal of a receiver.

The embodiment of the utility model also provides communication equipment, which comprises at least one filter.

It is to be understood that the filter, duplexer or multiplexer provided in the above embodiments may be applied to a communication system, such as a communication device (e.g., a base station or a terminal), and may also be applied to a radar system, which may not be limited herein.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A coupling adjustment mechanism for a filter, comprising: the coupling piece is arranged between the two resonance tubes of the filter, and the supporting clamping seat is used for rotating under the action of external force and driving the coupling piece to rotate so as to adjust the coupling amount between the resonance tubes.

2. The coupling adjustment mechanism of claim 1, wherein: the cover plate is provided with a through hole, and the support clamping seat comprises a clamping part elastically clamped in the through hole and a connecting part connected with the clamping part and used for connecting the coupling piece.

3. The coupling adjustment mechanism of claim 1 or 2, wherein: the coupling piece and the support clamping seat are fixedly connected together through clamping, or the coupling piece and the support clamping seat are fixedly connected together through an embedded integrated injection molding process.

4. The coupling adjustment mechanism of claim 1 or 2, wherein: the coupling piece is U-shaped, square, concave, square or notched.

5. The coupling adjustment mechanism of claim 1 or 2, wherein: the coupling adjustment mechanism further comprises an adjustment portion disposed on the support cartridge and configured to rotate the support cartridge.

6. The coupling adjustment mechanism of claim 1 or 2, wherein: the coupling piece is made of a conductive metal material, or the coupling piece is made of a non-conductive material, and the surface of the non-conductive material is treated by a metallization treatment process so as to achieve the purpose of surface conduction.

7. A filter, characterized by: comprising a resonator cavity having an open end, a cover plate covering said open end and being connected to said resonator cavity, at least two resonator tubes located within said resonator cavity, and a coupling adjustment mechanism according to any of claims 1 to 6.

8. A duplexer, characterized in that: comprising a transmit channel filter and a receive channel filter, said transmit channel filter and said receive channel filter being filtered using the filter of claim 7.

9. A multiplexer, its characterized in that: comprising a plurality of transmit channel filters and a plurality of receive channel filters, said transmit channel filters and said receive channel filters being filtered using the filter of claim 7.

10. A communication device, characterized by: comprising at least one filter according to claim 7.