CN217956094U

CN217956094U - Filter and communication device

Info

Publication number: CN217956094U
Application number: CN202221944289.9U
Authority: CN
Inventors: 钟志波; 谢星华; 吴亚晖; 洪壮壮
Original assignee: Anhui Tatfook Technology Co Ltd
Current assignee: Anhui Tatfook Technology Co Ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2022-12-02
Anticipated expiration: 2032-07-22

Abstract

The application relates to the field of radio frequency devices and provides a filter and communication equipment. The filter comprises a cavity and a resonance rod arranged in the cavity, the resonance rod is connected with the cavity, and the outer surface of the cavity is provided with a hole corresponding to the resonance rod. This wave filter is through setting up the resonance bar of being connected with the cavity in the cavity to set up the trompil that corresponds the setting with the resonance bar at the surface of cavity, with on the basis of guaranteeing the shielding function, preventing signal leakage, effectively alleviate the weight of wave filter through the trompil, thereby can realize the lightweight of wave filter better, make the wave filter be particularly useful for miniaturized product.

Description

Filter and communication device

Technical Field

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

Background

The filter is used as a radio frequency device, can pass signals in a certain frequency band with minimum loss, and can inhibit signals in other frequency bands, so that the function of selecting signals in a required frequency band is achieved. The existing filter generally includes a cavity, a cover plate covering the cavity, and a resonant rod disposed in the cavity. Therefore, the accessories of the existing filter are relatively simplified, and the light weight and the miniaturization can be basically realized. However, with the development of communication technology, how to further lighten the filter becomes a problem to be solved urgently in the industry.

SUMMERY OF THE UTILITY MODEL

An object of the embodiments of the present application is to provide a filter to solve the problem of how to further reduce the weight of the filter.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: the utility model provides a filter, includes the cavity and sets up resonance bar in the cavity, resonance bar with the cavity is connected, the surface of cavity seted up with the trompil that resonance bar corresponds the setting.

In one embodiment, the resonant rod has a connection end connected with the cavity; the connecting end is convexly provided with a connecting column, the cavity is correspondingly provided with a connecting hole, and the connecting column is in compression joint or threaded connection with the connecting hole.

In one embodiment, the connection hole communicates with the opening hole.

In one embodiment, the resonant rod has a connection end connected with the cavity; the connecting end is provided with a connecting hole, the cavity is correspondingly convexly provided with a connecting column, and the connecting column is in compression joint or threaded connection with the connecting hole.

In one embodiment, the resonance rod has a hole structure extending along an axial direction thereof, the hole structure penetrates through the resonance rod, and a part of the hole structure forms the connection hole; the opening is a blind hole.

In one embodiment, the connecting end is welded to the cavity.

In one embodiment, the connecting column is pressed and connected to the connecting hole, and the outer circumferential surface of the connecting column is provided with a protrusion.

In one embodiment, the resonant rod has a connection end connected to the cavity, and a free end opposite the connection end; the periphery of the free end is provided with at least one straight edge.

In one embodiment, the free end is provided with an even number of straight sides along the periphery thereof, each straight side is grouped in pairs, and the straight sides grouped in pairs are arranged opposite to each other along the radial direction of the free end.

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

The filter provided by the application has the beneficial effects that:

the filter that this application embodiment provided is through the resonance bar that sets up in the cavity and be connected with the cavity to set up the trompil that corresponds the setting with the resonance bar at the surface of cavity, with on the basis of guaranteeing barrier function, preventing signal leakage, effectively alleviate the weight of filter through the trompil, thereby can realize the lightweight of filter better, make the filter especially useful for miniaturized product.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments or the prior art description 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 for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.

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

FIG. 2 is a cross-sectional view of the filter provided in FIG. 1;

fig. 3 is a schematic perspective view of a resonant rod according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a filter according to a second embodiment of the present application;

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.

Wherein, in the figures, the various reference numbers:

10-cavity, 11-opening, 12-resonant cavity and 13-support table; 20-resonant rod, 21-connecting end, 22-free end, 23-hole structure, 24-resonant disk, 221-straight edge; 30-cover plate, 31-tuning plate, 32-guard plate; 40-connecting column, 41-bulge and 50-connecting 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, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, is not to be considered as limiting.

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 the case may be.

Therefore, the embodiment of the application provides a filter, can lighten weight, can better realize the lightweight of filter, is particularly useful for miniaturized product.

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

example one

Referring to fig. 1 and 2, an embodiment of the present application provides a filter, including a cavity 10 and a resonant rod 20 disposed in the cavity 10, wherein the resonant rod 20 is connected to the cavity 10, and an opening 11 disposed corresponding to the resonant rod 20 is disposed on an outer surface of the cavity 10.

It should be noted that the cavity 10 has a resonant cavity 12, a resonant rod 20 is disposed in the resonant cavity 12, and one end of the resonant rod 20 is connected to the cavity 10, and optionally, the resonant rod 20 may be connected to the cavity 10 by, but not limited to, welding, integral connection, riveting, crimping, screw fastening, threaded connection, clamping, and the like, which is not limited to this embodiment.

The resonant rod 20 may be a metal resonant rod 20, a ceramic dielectric resonant rod 20, or a dielectric resonant rod 20 made of other materials, the resonant rod 20 may be a circular rod, a polygonal rod, a special-shaped rod, or other shapes, the resonant rod 20 may be a hollow resonant rod 20 or a solid resonant rod 20, the resonant rod 20 may have a resonant disk 24 or may not have the resonant disk 24, and the resonant disk 24 may have a flange or may not have a flange, which is not limited in this embodiment.

It should be further noted that, the filter further includes a cover plate 30 for covering the cavity 10, and the cover plate 30 covers the cavity 10, particularly the resonant cavity 12, so that a shielding function can be achieved and signal leakage can be prevented.

As shown in fig. 1 and 2, in one possible embodiment, the cover plate 30 includes a tuning plate 31 disposed corresponding to the resonant rod 20 and capable of being deformed by force, and a shielding plate 32 connected to the tuning plate 31 and covering the cavity 10 together with the tuning plate 31. Based on this, the distance between the tuning plate 31 and the resonant rod 20 can be adjusted by deforming the tuning plate 31 under stress, so as to adjust the capacitance between the tuning plate 31 and the resonant rod 20, thereby adjusting the resonant frequency and being very convenient to adjust.

In another possible embodiment, the cover plate 30 is provided with a threaded hole (not shown in the figures), and the filter further comprises a tuning screw (not shown in the figures) which is threadedly coupled to the threaded hole of the cover plate 30 and is disposed in correspondence with the resonance bar 20. Based on this, the tuning screw can be rotated relative to the cover plate 30 to adjust the length of the portion of the tuning screw extending into the cavity 10, thereby adjusting the resonant frequency.

It should be noted that the opening 11 is opened on the outer surface of the cavity 10 and is disposed corresponding to the resonant rod 20. Therefore, when the opening 11 is a blind hole, the shielding function can be ensured and the signal leakage can be prevented through the part of the cavity 10 corresponding to the bottom of the opening 11; when the opening 11 is a through hole, the resonant rod 20 disposed corresponding to the opening 11 can seal the opening of the opening 11 close to the resonant cavity 12, so as to achieve the shielding function and prevent signal leakage. Therefore, on the basis of ensuring the shielding function and preventing signal leakage, the weight of the filter can be effectively reduced through the opening 11, the filter can be better lightened, and the filter is particularly suitable for miniaturized products.

To sum up, the filter that this application embodiment provided is through set up the resonance pole 20 of being connected with cavity 10 in cavity 10 to set up the trompil 11 that corresponds the setting with resonance pole 20 in the surface of cavity 10, with on the basis of guaranteeing the shielding function, preventing signal leakage, effectively alleviate the weight of filter through trompil 11, thereby can realize the lightweight of filter better, make the filter especially be applicable to miniaturized product.

Referring to fig. 1 and 2, in the present embodiment, the resonant rod 20 has a connecting end 21 connected to the cavity 10; the connecting end 21 is convexly provided with a connecting column 40, the cavity 10 is correspondingly provided with a connecting hole 50, and the connecting column 40 is pressed in the connecting hole 50.

It should be noted that, an end of the resonant rod 20 connected to the cavity 10 is defined as a connection end 21, and an end of the resonant rod 20 opposite to the connection end 21, that is, an end of the resonant rod 20 close to the cover 30 is defined as a free end 22.

The connecting end 21 of the resonant rod 20 can be protruded towards one side far away from the free end 22 to form a connecting column 40, and the inner side surface of the cavity 10 close to the connecting end 21 is provided with a connecting hole 50 corresponding to the connecting column 40. Based on this, the connection end 21 of the resonant rod 20 can be quickly, conveniently and reliably connected to the cavity 10 by crimping the connection post 40 to the connection hole 50, so that the connection convenience and the connection reliability between the resonant rod 20 and the cavity 10 can be effectively ensured and improved. Moreover, due to the tight compression between the connecting column 40 and the connecting hole 50, even if the opening 11 is communicated with the connecting hole 50, the connecting column 40 can be effectively plugged in the connecting hole 50, so that the shielding function is effectively guaranteed and the signal leakage is prevented on the basis of effectively reducing the weight through the opening 11.

Referring to fig. 1 and 2, in the present embodiment, the connection hole 50 is connected to the opening 11.

Through adopting above-mentioned scheme, can be through effective shutoff in connecting hole 50 of spliced pole 40 to effectively ensure the shielding function, prevent on the basis that the signal reveals, through making connecting hole 50 communicate trompil 11, and leave out the thin wall structure of the normal position between connecting hole 50 and trompil 11 of cavity 10, not only more do benefit to the processing of cavity 10, still can further lighten the weight of wave filter, can realize the lightweight of wave filter better.

Of course, in other possible embodiments, the connection hole 50 may not be connected to the opening 11, and thus, a thin-wall structure may be formed between the connection hole 50 and the opening 11, and the signal may be effectively prevented from leaking from the connection hole 50 and the opening 11 by the thin-wall structure, so that the shielding function may be effectively ensured.

Referring to fig. 1 and 2, in the present embodiment, the connecting end 21 is welded to the cavity 10.

Through adopting above-mentioned scheme, can be through the cooperation between spliced pole 40 and the connecting hole 50, realize the basis of being connected between the link 21 of resonance bar 20 and the cavity 10, further weld link 21 to cavity 10, based on this, can further strengthen the connection reliability between resonance bar 20 and the cavity 10, connect the steadiness, simultaneously, when connecting hole 50 intercommunication trompil 11, also further prevent that the signal from leaking from connecting hole 50, shielding function has been strengthened, thereby can further ensure and improve signal processing's stability.

Referring to fig. 1 and 2, in the present embodiment, a supporting platform 13 is protruded from the cavity 10 toward the resonant rod 20, and the supporting platform 13 is provided with a connecting hole 50.

Through adopting above-mentioned scheme, accessible brace table 13 reliably supports resonance rod 20 to make resonance rod 20 can be stably predetermineeing axial position and predetermine the height promptly, on the basis, cavity 10 and the casing that resonance rod 20 is connected except that the region of brace table 13 can accomplish thinly relatively, thereby can effectively alleviate the weight of wave filter, can realize the lightweight of wave filter better. Meanwhile, because the thickness of the support table 13 is relatively thick, the opening 11 is formed in the outer surface of the support table 13 far away from the resonant rod 20, the weight of the filter is effectively reduced through the opening 11, the filter can be lightened better, and the filter is particularly suitable for miniaturized products.

Referring to fig. 1 and 2, in the present embodiment, the cross-sectional area of the connecting post 40 is smaller than the cross-sectional area of the connecting end 21 of the resonant rod 20, and therefore, the connecting post 40 and the connecting end 21 of the resonant rod 20 form a step structure, which is more favorable for installation and positioning between the connecting post 40 and the connecting hole 50.

Referring to fig. 2 and 3, in the present embodiment, the connection post 40 is pressed into the connection hole 50, and the outer circumferential surface of the connection post 40 is provided with a protrusion 41.

By adopting the above scheme, the arrangement of the protrusion 41 can promote the connection column 40 and the connection hole 50 to form a relatively tight or even interference crimping fit, so that the connection reliability and connection stability between the resonance rod 20 and the cavity 10 can be further enhanced.

In the present embodiment, the number, the arrangement position, the structural form, and the like of the protrusions 41 are not limited. For example, the protrusion 41 may be in the shape of a rib.

Referring to fig. 2 and 3, in the present embodiment, the resonant rod 20 has a connection end 21 connected to the cavity 10, and a free end 22 opposite to the connection end 21, and a periphery of the free end 22 is provided with at least one straight edge 221.

In a possible embodiment, the resonator rod 20 is provided with a resonator plate 24 at the free end 22, the periphery of the resonator plate 24 being provided with at least one straight edge 221. Wherein, the resonant disk 24 can be a disk initially, and the periphery of the resonant disk 24 forms at least one straight edge 221 by cutting; alternatively, the resonator plate 24 with a non-circular shape and at least one straight edge 221 on the periphery can be directly formed integrally, for example, the resonator plate 24 with a hexagonal shape can be directly formed integrally.

Based on this, by adopting the above-mentioned solution, it is convenient for a human hand to hold or hold the straight edge 221 of the free end 22, and the mounting of the resonant rod 20 to the cavity 10 is more quickly and conveniently realized, and especially when adopting the solution of the second and fourth embodiments "the connecting column 40 is screwed into the connecting hole 50", it is more convenient to mount the resonant rod 20 into the cavity 10 by screwing operation.

Referring to fig. 3, in the present embodiment, an even number of straight edges 221 are disposed on the periphery of the free end 22, each straight edge 221 is grouped two by two, and the grouped two by two straight edges 221 are disposed opposite to each other along the radial direction of the free end 22.

Based on the arrangement of the present embodiment, the two groups of straight edges 221 can be oppositely arranged and correspondingly arranged on the two opposite sides of the free end 22 along the radial direction, so that the user can conveniently hold or clamp any group of straight edges 221 by hands, and the resonance rod 20 can be mounted to the cavity 10 more conveniently, more quickly and more conveniently in a labor-saving manner with balanced force application.

Referring to fig. 1, an embodiment of the present application further provides a communication device including a filter.

By adopting the scheme, the communication equipment can effectively reduce the weight, and can realize miniaturization and light weight.

The communication device may be a multiplexer, a duplexer, a multiplexer, a combiner, an antenna, a base station, or other communication devices.

Example two

The difference between this embodiment and the first embodiment is:

referring to fig. 4, in the present embodiment, the resonant rod 20 has a connection end 21 connected to the cavity 10; the connecting end 21 is convexly provided with a connecting column 40, the cavity 10 is correspondingly provided with a connecting hole 50, and the connecting column 40 is in threaded connection with the connecting hole 50.

The connecting end 21 of the resonant rod 20 can be convexly arranged towards one side far away from the free end 22 to form a connecting column 40, an external thread is arranged on the outer peripheral surface of the connecting column 40, a connecting hole 50 corresponding to the connecting column 40 is formed in the inner side surface, close to the connecting end 21, of the cavity 10, and an internal thread is arranged on the hole wall of the connecting hole 50. Based on this, the connection end 21 of the resonance bar 20 can be quickly, conveniently and reliably connected to the cavity 10 by screwing the connection post 40 to the connection hole 50, so that the connection convenience and the connection reliability between the resonance bar 20 and the cavity 10 can be effectively secured and improved. Moreover, due to the threaded connection and matching between the connecting column 40 and the connecting hole 50, even if the opening 11 is communicated with the connecting hole 50, the connecting column 40 and the threads thereof can be effectively self-locked and plugged in the connecting hole 50, so that the shielding function is effectively guaranteed and the signal leakage is prevented on the basis of effectively reducing the weight through the opening 11.

EXAMPLE III

The difference between this embodiment and the first embodiment is:

referring to fig. 5, in the present embodiment, the resonant rod 20 has a connection end 21 connected to the cavity 10; the connecting end 21 is provided with a connecting hole 50, the cavity 10 is correspondingly convexly provided with a connecting column 40, and the connecting column 40 is pressed in the connecting hole 50.

It should be noted that the end of the resonant rod 20 connected to the cavity 10 is defined as a connecting end 21, and the end of the resonant rod 20 opposite to the connecting end 21, that is, the end of the resonant rod 20 close to the cover 30 is defined as a free end 22.

The inner side surface of the cavity 10 close to the connecting end 21 is convexly arranged towards the connecting end 21 to form a connecting column 40, and the end surface of the connecting end 21 far away from the free end 22 is provided with a connecting hole 50 corresponding to the connecting column 40. Based on this, the connection end 21 of the resonant rod 20 can be quickly, conveniently and reliably connected to the cavity 10 by crimping the connection post 40 to the connection hole 50, so that the connection convenience and the connection reliability between the resonant rod 20 and the cavity 10 can be effectively ensured and improved.

Referring to fig. 5, in the present embodiment, the resonant rod 20 has a hole structure 23 extending along an axial direction thereof, the hole structure 23 penetrates through the resonant rod 20, and a connection hole 50 is formed in a part of the hole structure 23; the opening 11 is a blind hole.

It should be noted here that the resonant rod 20 has a hole structure 23 extending along the axial direction thereof, the hole structure 23 penetrates through the resonant rod 20, and a connection hole 50 is formed in a portion of the hole structure 23 corresponding to the connection end 21, so that the opening 11 is a blind hole without connecting the hole structure 23, the connection hole 50 and the resonant cavity 12, and further, the shielding function and signal leakage can be effectively ensured through the portion of the cavity 10 corresponding to the bottom of the opening 11.

Of course, in other possible embodiments, the resonant rod 20 does not have the hole structure 23, and the connection hole 50 is a blind hole; or the hole structure 23 is arranged at the free end 22 and does not penetrate through the resonance rod 20, the connecting end 21 is provided with a connecting hole 50, and the connecting hole 50 is not communicated with the hole structure 23. At this moment, this embodiment does not restrict trompil 11 and is through-hole or blind hole, all can effectively ensure shielding function, prevent that the signal from revealing.

Meanwhile, when the resonant rod 20 has the hole structure 23, the interior of the resonant rod 20 is completely or partially hollow, and on the basis, the weight of the resonant rod 20 can be effectively reduced through the hole structure 23, so that the weight of the filter can be effectively reduced, the light weight of the filter can be better realized, and the filter is particularly suitable for miniaturized products.

Referring to fig. 5, in the present embodiment, the cavity 10 is provided with a support platform 13 protruding toward the resonant rod 20, and the support platform 13 is provided with a connection column 40 protruding.

Referring to fig. 5, in the present embodiment, the connecting column 40 and the supporting platform 13 form a step structure, thereby facilitating the installation and positioning between the connecting hole 50 and the connecting column 40.

Example four

The difference between this embodiment and the third embodiment is that:

referring to fig. 6, in the present embodiment, the resonant rod 20 has a connecting end 21 connected to the cavity 10; the connecting end 21 is provided with a connecting hole 50, the cavity 10 is correspondingly provided with a connecting column 40 in a protruding manner, and the connecting column 40 is connected with the connecting hole 50 in a threaded manner.

The inner side surface of the cavity 10 close to the connecting end 21 is convexly arranged towards the connecting end 21 to form a connecting column 40, an external thread is arranged on the outer peripheral surface of the connecting column 40, a connecting hole 50 corresponding to the connecting column 40 is formed in the end surface of the connecting end 21 far away from the free end 22, and an internal thread is arranged on the hole wall of the connecting hole 50. Based on this, the connection end 21 of the resonant rod 20 can be quickly, conveniently and reliably connected to the cavity 10 by screwing the connection post 40 to the connection hole 50, so that the connection convenience and the connection reliability between the resonant rod 20 and the cavity 10 can be effectively secured and improved.

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

1. The filter is characterized by comprising a cavity and a resonant rod arranged in the cavity, wherein the resonant rod is connected with the cavity, and the outer surface of the cavity is provided with a hole correspondingly arranged on the resonant rod.

2. The filter of claim 1, wherein the resonant rod has a connection end connected to the cavity; the connecting end is convexly provided with a connecting column, the cavity is correspondingly provided with a connecting hole, and the connecting column is in compression joint or threaded connection with the connecting hole.

3. The filter of claim 2, wherein the connection hole communicates with the opening.

4. The filter of claim 1, wherein the resonant rod has a connection end connected to the cavity; the connecting end is provided with a connecting hole, the cavity is correspondingly and convexly provided with a connecting column, and the connecting column is in compression joint or threaded connection with the connecting hole.

5. A filter according to claim 4, characterised in that the resonance rod has a hole structure extending in its axial direction, the hole structure passing through the resonance rod, a part of the hole structure forming the connection hole; the opening is a blind hole.

6. A filter according to any of claims 2-5, characterised in that the connection ends are welded to the cavity.

7. The filter according to any one of claims 2-5, wherein the connection post is press-fitted into the connection hole, and a protrusion is provided on an outer circumferential surface of the connection post.

8. A filter according to any of claims 1-5, characterised in that the resonance rod has a connection end connected to the cavity and a free end opposite the connection end; the periphery of the free end is provided with at least one straight edge.

9. The filter according to claim 8 wherein said free end has an even number of said straight edges along its periphery, each of said straight edges being grouped two by two, said straight edges grouped two by two being disposed diametrically opposite said free end along said periphery.

10. A communication device comprising a filter according to any of claims 1-9.