CN220122082U

CN220122082U - Filter and communication equipment

Info

Publication number: CN220122082U
Application number: CN202321336783.1U
Authority: CN
Inventors: 李�杰; 洪壮壮
Original assignee: Anhui Tatfook Technology Co Ltd
Current assignee: Anhui Tatfook Technology Co Ltd
Priority date: 2023-05-26
Filing date: 2023-05-26
Publication date: 2023-12-01
Anticipated expiration: 2033-05-26

Abstract

The utility model relates to the field of radio frequency devices, and provides a filter and communication equipment, wherein the filter comprises a cavity, a base arranged on the bottom wall in the cavity, a resonant rod arranged on the base and a signal transmission piece, one end of the signal transmission piece is connected with the base, and the other end of the signal transmission piece is coupled and connected with an external signal source; the outer wall of the base connecting signal transmission piece is provided with a first groove, and the first groove is positioned on one side of the signal transmission piece, which is close to the joint of the base and the inner bottom wall of the cavity. According to the filter provided by the utility model, the strength of the signal transmission part can be adjusted by adjusting the size and the depth of the first groove, the adjustment of the coupling strength of the signal transmission part is not required to be realized by changing the width and the height of the signal transmission part, the weight of the base can be reduced, and the weight of the filter is facilitated; meanwhile, the adjustment of the coupling strength is realized by changing the depth and the size of the first groove, the problem that the adjustment range of the coupling strength is smaller can be solved, and the miniaturization of the filter is facilitated.

Description

Filter and communication equipment

Technical Field

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

Background

The filter is one of important devices in communication technology, and mainly has the function of passing useful signals as unattenuated as possible and attenuating unwanted signals as greatly as possible, and is often used as a frequency selection device for selecting the frequency of communication signals and filtering noise or interference signals outside the frequency of the communication signals, and is widely used in mobile base stations to reduce intermodulation signal interference and generate high-quality communication signals, which is an indispensable device in electronic communication systems. The miniaturization metal filter can greatly reduce the product size, has the advantages of high Q value, small temperature drift, low cost and the like, and gradually becomes a trend of miniaturization and light weight of the filter.

The existing filter generally comprises a cavity, a signal transmission piece and a resonant rod, wherein the signal transmission piece and the resonant rod are positioned in the cavity, the resonant rod is coupled with the signal transmission piece, and the adjustment of the coupling strength can be realized by changing the width and the height of the signal transmission piece. However, due to the small space in the cavity of the miniaturized filter, the width and height adjustment range of the signal transmission member is limited, and the range for realizing the adjustment of the coupling strength by changing the width and height of the signal transmission member is small.

Disclosure of Invention

The utility model aims to provide a filter and communication equipment, which are used for solving the technical problem that the range of adjusting the coupling strength is smaller by changing the width and the height of a signal transmission part in the existing filter.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the filter comprises a cavity, a base arranged on the bottom wall in the cavity, a resonant rod arranged on the base and a signal transmission piece, wherein one end of the signal transmission piece is connected with the base, and the other end of the signal transmission piece is coupled and connected with an external signal source;

the base is connected with the outer wall of the signal transmission piece, and a first groove is formed in the outer wall of the signal transmission piece and is located on one side, close to the junction of the base and the inner bottom wall of the cavity, of the signal transmission piece.

In some embodiments, the cavity is provided with a signal transmission port communicated with the outside, and one end of the signal transmission piece, which is away from the base, penetrates through the signal transmission port.

In some embodiments, the signal transmission member and the projection of the signal transmission port on the base along the extending direction of the signal transmission member form an annular region, and the first groove is located in the annular region.

In some embodiments, the first groove is an arcuate groove, and the first groove conforms to the shape of the signal transmission port.

In some embodiments, an annular protrusion is disposed on an outer side wall of the cavity, a mounting hole communicated with the signal transmission port is formed in the annular protrusion, and the signal transmission member penetrates through the mounting hole.

In some embodiments, the filter further comprises a dielectric sleeve, the dielectric sleeve is arranged between the inner wall of the signal transmission port and the outer periphery of the signal transmission piece, and the dielectric sleeve is arranged between the inner wall of the mounting hole and the outer periphery of the signal transmission piece.

In some embodiments, the filter further comprises a coupling rib disposed on the bottom wall in the cavity and connected to the base, wherein a second groove is formed in a side, close to the base, of the coupling rib, and the second groove is located on a side, away from the base, of the coupling rib.

In some embodiments, the second groove is a rectangular groove.

In some embodiments, the base is integrally formed with the coupling rib.

In some embodiments, the signal transmission member is detachably connected to the base.

The utility model also provides a communication device comprising a filter as described above.

Compared with the prior art, the filter provided by the utility model has the advantages that the first groove is formed in the outer wall of the signal transmission part connected with the base, the first groove is positioned on one side of the signal transmission part, which is close to the joint of the base and the inner bottom wall of the cavity, so that the transmission of signals to the grounding end can be blocked, the strength of the signal transmission part can be regulated by regulating the size and the depth of the first groove, and the regulation of the coupling strength of the signal transmission part is realized without changing the width and the height of the signal transmission part. On the basis, on one hand, the weight of the base can be reduced, and the weight of the filter is facilitated; on the other hand, because the space in the cavity is narrow and small, the width and the height adjustment range of the signal transmission piece are limited, the range of adjusting the coupling strength is smaller by changing the width and the height of the signal transmission piece, and the adjustment of the coupling strength is realized by changing the depth and the size of the first groove, so that the problem that the range of adjusting the coupling strength is smaller can be solved, namely, the adjustment of the coupling strength is realized by changing the depth and the size of the first groove, the excessive space in the cavity can be not occupied, and the miniaturization of the filter is facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of a filter provided in an embodiment of the present utility model;

fig. 2 is a perspective view of a filter according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of an internal structure of a filter according to an embodiment of the present utility model;

FIG. 4 is a front view of an embodiment of the present utility model;

fig. 5 is a cross-sectional view taken along A-A of fig. 4.

Wherein, each reference sign in the figure:

1-a cavity; 11-a signal transmission port; 12-annular protrusions; 121-mounting holes; 2-a base; 21-a first groove; 3-resonant rods; 31-a resonant disk; 32-flanging; 4-signal transmission members; 5-coupling ribs; 51-a second groove; 6-medium sleeve.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model 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 for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" 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 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 merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

As shown in fig. 1, 3 and 5, the filter provided by the present utility model will now be described, and the filter includes a cavity 1, a base 2 disposed on the bottom wall of the cavity 1, a resonant rod 3 disposed on the base 2, and a signal transmission member 4, wherein one end of the signal transmission member 4 is connected to the base 2, and the other end of the signal transmission member 4 is coupled to an external signal source.

The signal transmission member 4 may be connected to the base 2 at one end, and may be formed integrally with the base 2 by welding, riveting, crimping, screw fastening, screwing, clamping, or the like. The material of the base 2 and the material of the signal transmission member 4 are both metal members and can be the same, for example, aluminum materials, or can be different, for example, the base 2 is made of iron materials, the signal transmission member 4 is made of copper materials, and the setting can be specifically selected according to the connection mode of the base 2 and the signal transmission member 4 and the required performance index. Illustratively, when the signal transmission member 4 is pressed against the base 2, the signal transmission member 4 is directly pressed against the base 2, and this connection requires that the hardness of the signal transmission member 4 is greater than that of the base 2, for example, the base 2 is made of aluminum and the signal transmission member 4 is made of copper. The signal transmission piece 4 is in pressure connection with the base 2 in a detachable connection mode, so that the signal transmission piece 4 and the base 2 are simple to install, high in assembly precision and low in installation cost.

The inner space of the cavity 1 is used for accommodating the base 2 and the resonant rod 3; the signal transmission member 4 may be partially located in the cavity 1, or the signal transmission member 4 may be entirely located in the cavity 1, which is not limited thereto.

It should be noted that, the cavity 1 is a metal piece, which can realize a shielding function and prevent signal leakage. The present embodiment does not limit the shape, size, etc. of the cavity 1.

The cavity 1 may be, but is not limited to, a polygonal cylinder, a circular cylinder, or any other irregularly shaped cylinder. The polygonal tubular shape means that the cross-sectional outer contour of the cavity 1 is polygonal, and further, the cross-sectional shapes of the cavity 1 in the height direction (the vertical direction of the cross-section) may or may not be identical. The cavity 1 may be integrally formed, or may be formed by separately connecting a plurality of portions, which is not particularly limited.

As shown in fig. 5, the base 2 is disposed in the cavity 1, the resonant rod 3 is disposed on the base 2, and the base 2 not only can stably support and fix the resonant rod 3, but also can raise the position of the resonant rod 3, so that the distance between the free end of the resonant rod 3 away from the base 2 and the top wall of the cavity 1 is reduced, thereby increasing the capacitance therebetween and strengthening the resonance index.

Specifically, the base 2 may be integrally formed with the cavity 1, or may be separately connected with the cavity 1, for example, fixedly connected by a connecting piece, and connected by welding, etc., which is not limited in particular. Preferably, the base 2 and the cavity 1 are integrally formed, so that the mounting procedure between the base 2 and the cavity 1 can be omitted, the mounting convenience and stability of the base 2 can be effectively ensured and improved, and meanwhile, the passive intermodulation can be reduced. The material of the base 2 and the material of the cavity 1 may be the same, for example, all the materials may be aluminum materials, or may be different, for example, the base 2 is made of iron materials, and the cavity 1 is made of aluminum materials, which is not particularly limited.

The resonant rod 3 may be connected to the base 2 by means including, but not limited to, welding, riveting, crimping, screw fastening, screwing, clamping, etc., which is not limited in this embodiment. The material of the resonant rod 3 may be the same as that of the base 2, for example, aluminum, or may be different from that of the base 2, for example, aluminum, and the resonant rod 3 is iron, which is not particularly limited.

It should be noted that one or more resonant rods 3 may be disposed in the cavity 1. When a plurality of resonant rods 3 are arranged in the cavity 1, the base 2 corresponding to at least one of the resonant rods 3 is coupled with the signal transmission piece 4, and the resonant rods 3 form a required coupling relationship so as to form a complete and ordered signal channel inside the filter. The resonant rod 3 may be a metal resonant rod, a ceramic dielectric resonant rod or a dielectric resonant rod made of other materials, the resonant rod 3 may be a circular rod, a polygonal rod, a special-shaped rod, a metal plate resonant rod or other forms, the resonant rod 3 may be a hollow resonant rod or a solid resonant rod, the resonant rod 3 may be provided with a resonant disk 31 or without a resonant disk 31, the resonant disk 31 may be provided with a flanging 32 or without a flanging 32, and the present embodiment is not limited in this respect. Illustratively, as shown in fig. 3, the resonant rod 3 has a resonant disk 31, and the resonant disk 31 has a flange 32. The resonance disc 31 can be arranged concentrically with the resonance rod 3, and the resonance disc 31 can also adopt an eccentric or special-shaped structure, and can be specifically and selectively arranged according to actual needs.

The outer wall of the base 2, which is connected with the signal transmission piece 4, is provided with a first groove 21, and the first groove 21 is positioned on one side of the signal transmission piece 4, which is close to the joint of the base 2 and the inner bottom wall of the cavity 1.

Because the electric field of the filter is concentrated on the side of the cavity 1 away from the inner bottom wall, the first groove 21 is positioned on the side of the signal transmission member 4 close to the junction of the base 2 and the inner bottom wall of the cavity 1, and can prevent the transmission of signals to the grounding end, thereby adjusting the signal intensity of the signal transmission member 4.

The signal transmission member 4 may be a sheet-like structure, a columnar structure, a rod-like structure, a wire-like structure, or the like, which is not limited in this embodiment.

When the size of the first recess 21 is fixed, the deeper the first recess 21 is, the stronger the coupling of the signal transmission member 4 is; when the depth of the first recess 21 is constant, the larger the first recess 21 is, the stronger the coupling of the signal transmission member 4 is.

Here, the size of the first groove 21 refers to the size of the projection area of the first groove 21 on the base 2 along the extending direction of the signal transmission member 4, such as the width size and the length size, and the depth of the first groove 21 refers to the depth of the first groove 21 along the extending direction of the signal transmission member 4. The shape of the first groove 21 may be regular, for example, the first groove 21 may be a bar-shaped groove, or may be irregular, and the depths and the sizes of different areas of the first groove 21 may be the same or different, which may be specifically selected and set according to the actual needs and the actual processing difficulty.

Compared with the prior art, the filter provided by the utility model has the advantages that the first groove 21 is formed in the outer wall of the base 2, which is connected with the signal transmission piece 4, and the first groove 21 is positioned on one side of the signal transmission piece 4, which is close to the connection part of the base 2 and the inner bottom wall of the cavity 1, so that the transmission of signals to the grounding end can be blocked, the strength of the signal transmission piece 4 can be regulated by regulating the size and depth of the first groove 21, and the regulation of the coupling strength of the signal transmission piece 4 is realized without changing the width and the height of the signal transmission piece 4. On the one hand, the weight of the base 2 can be reduced, which is beneficial to the weight reduction of the filter; on the other hand, because the space in the cavity 1 is narrow, the width and height adjustment range of the signal transmission member 4 is limited, the range for adjusting the coupling strength is smaller by changing the width and height of the signal transmission member 4, and the adjustment of the coupling strength is realized by changing the depth and the size of the first groove 21, so that the problem that the range for adjusting the coupling strength is smaller can be solved, that is, the adjustment of the coupling strength is realized by changing the depth and the size of the first groove 21, the excessive space in the cavity 1 can be not occupied, and the miniaturization of the filter is facilitated.

In the prior art, the coupling strength between the signal transmission piece 4 and the resonant rod 3 is changed by bending the signal transmission piece 4, but because the space in the cavity 1 of the filter is narrow, the bending of the signal transmission piece 4 is difficult, the tolerance of the signal transmission piece 4 after bending is larger, and the consistency and the dimensional accuracy of the signal transmission piece 4 are difficult to ensure. In this embodiment, the coupling strength of the signal transmission member 4 is changed by setting the first groove 21, so that the adjustment of the coupling strength of the signal transmission member 4 is not required to be realized by bending the signal transmission member 4, and the difficulty in adjusting the coupling strength of the signal transmission member 4 can be reduced.

In an embodiment, the cavity 1 is provided with a signal transmission port 11 communicated with the outside, and one end of the signal transmission member 4, which is far away from the base 2, is penetrated through the signal transmission port 11. Specifically, the signal transmission port 11 may be disposed in a position corresponding to the signal transmission member 4, so that an end of the signal transmission member 4 facing away from the base 2 is disposed through the signal transmission port 11.

In practical applications, the signal transmission member 4 may be directly connected to an external signal source after passing through the signal transmission port 11, or the signal transmission member 4 may be connected to the external signal source after passing through the signal transmission port 11 through other structures, which is not limited in this embodiment.

In an embodiment, the signal transmission member 4 is directly connected to an external signal source after penetrating through the signal transmission port 11, and the resonant rod 3 can be coupled with the signal transmission member 4 through the base 2, and then connected with the external signal source through the signal transmission member 4 penetrating through the signal transmission port 11, without setting any other structure for connecting the signal transmission member 4 and the external signal source. On the one hand, other structures for connecting the signal transmission part 4 with an external signal source can be omitted, so that the structure can be simplified, the material types can be reduced, the cost can be reduced, and the miniaturization of the filter can be facilitated; on the other hand, it is convenient to transmit signals between the external signal source and the signal transmission member 4 quickly and reliably, and the signal transmission path therebetween is relatively short, so that the signal strength can be effectively enhanced, and the performance index of the filter can be effectively improved.

In one embodiment, as shown in fig. 4, the signal transmission member 4 and the signal transmission port 11 form an annular region between projections of the signal transmission member 4 on the base 2 along an extending direction of the signal transmission member 4, and the first groove 21 is located in the annular region. So, can make things convenient for the processing of first recess 21, during processing, only need with the processing cutter pass signal transmission mouth 11 and with base 2 contact can, need not to carry out the slope of different angles to the cutter, reduced the processing degree of difficulty of first recess 21, improved the machining efficiency of first recess 21.

In an embodiment, the first groove 21 is an arc groove, and the shape of the first groove 21 is consistent with that of the signal transmission port 11, so that when the cutter extends into the signal transmission port 11 to process the first groove 21, the cutter can be fed along the shape of the signal transmission port 11 in a narrow space between the signal transmission port 11 and the signal transmission member 4, and the processing difficulty of the first groove 21 can be reduced. Preferably, in some embodiments, the depths of different areas of the first groove 21 are the same, so that when the cutter extends into the signal transmission port 11 to process the first groove 21, the cutter only needs to feed in the extending direction of the first groove 21, and the cutter does not need to feed in the extending direction of the signal transmission member 4, so that the processing difficulty of the first groove 21 can be further reduced.

During specific processing, after the cutter finishes processing the signal transmission port 11 of the cavity 1, the cutter can extend into the cavity 1 from the signal transmission port 11 to process the first groove 21, so that the processing precision of the first groove 21 can be improved, and the consistency of the coupling strength of the signal transmission piece 4 can be ensured; it will be understood that the first groove 21 may be machined after other machining steps, which is not particularly limited.

In an embodiment, as shown in fig. 1, 2 and 4, an annular protrusion 12 is disposed on an outer side wall of the cavity 1, a mounting hole 121 communicating with the signal transmission port 11 is formed on the annular protrusion 12, and the signal transmission member 4 is disposed through the mounting hole 121. The signal transmission member 4 is insulated from the signal transmission port 11 and the mounting hole 121, specifically, the outer periphery of the signal transmission member 4 is spaced from the inner wall of the signal transmission port 11, and the outer periphery of the signal transmission member 4 is also spaced from the inner wall of the mounting hole 121; between the periphery of the signal transmission member 4 and the signal transmission port 11, between the periphery of the signal transmission member 4 and the mounting hole 121, insulation can be performed through an insulation structure, insulation can also be performed through air, and when insulation is performed through air, the signal transmission member 4 is in a suspended state relative to the signal transmission port 11 and the mounting hole 121. Thus, the annular protrusion 12 can effectively protect the signal transmission member 4, reduce the risk of damage when the signal transmission member 4 is in butt joint (for example, in butt joint) with an external signal source, and simultaneously, the annular protrusion 12 can also provide a guiding function for the butt joint of the external signal source and the signal transmission member 4.

The annular bulge 12 can be integrally formed on the outer side wall of the cavity 1, can be separately arranged with the outer side wall of the cavity 1, and can be specifically selected and arranged according to actual needs.

In practical application, under the condition that the outer side wall of the cavity 1 is provided with the annular bulge 12, the mounting hole 121 and the shape of the annular bulge 12 can be consistent with those of the signal transmission port 11, and the size of the mounting hole 121 can be larger than or equal to that of the signal transmission port 11, so that a cutter can conveniently pass through the signal transmission port 11 to process the first groove 21 after passing through the mounting hole 121.

In one embodiment, as shown in fig. 2, the filter further includes a dielectric sleeve 6, the dielectric sleeve 6 is disposed between the inner wall of the signal transmission port 11 and the outer periphery of the signal transmission member 4, and the dielectric sleeve 6 is disposed between the inner wall of the mounting hole 121 and the outer periphery of the signal transmission member 4.

The dielectric sleeve 6 is made of an insulating material so as to insulate the signal transmission member 4 from the signal transmission port 11 and the mounting hole 121, and at the same time, the dielectric sleeve 6 is also helpful to promote the stability of the relative state and the relative position between the signal transmission member 4 and the signal transmission port 11, so that the risk that the signal transmission member 4 shakes relative to the signal transmission port 11 and contacts with the inner wall of the signal transmission port 11 can be effectively reduced, and the signal transmission member 4 can reliably transmit signals between the resonance rod 3 and an external signal source. The medium cover 6 sets up in the inner wall of signal transmission mouth 11 and the inner wall of mounting hole 121, so, the annular protruding 12 of accessible supports signal transmission part 4 and medium cover 6, reduces signal transmission part 4 and the unsettled degree of medium cover 6 to effectively reduce signal transmission part 4 and medium cover 6 and appear crooked, the risk of damage under long-term use, be favorable to prolonging signal transmission part 4, medium cover 6 and the life of wave filter.

In an embodiment, as shown in fig. 1 and 3, the filter further includes a coupling rib 5 disposed at the inner bottom wall of the cavity 1 and connected to the base 2, where the coupling rib 5 is connected between the two bases 2 corresponding to the two resonant rods 3 that need to be constructed in a coupling relationship, and may be used to enhance the coupling between the two resonant rods 3. A second groove 51 is formed in one side, close to the base 2, of the coupling rib 5, and the second groove 51 is located on one side, away from the base 2, of the coupling rib 5. The second groove 51 may or may not penetrate the coupling rib 5 in the thickness direction of the coupling rib 5.

The second groove 51 is located at a side of the coupling rib 5 away from the base 2, and can block transmission of signals to the ground, so that strength of the signal transmission member 4 is adjusted.

When the size of the second groove 51 is fixed, the deeper the second groove 51 is, the stronger the coupling of the signal transmission member 4 is; when the depth of the second groove 51 is fixed, the larger the second groove 51 is, the stronger the coupling of the signal transmission member 4 is, so that the coupling strength of the signal transmission member 4 can be adjusted by changing the depth and the size of the second groove 51, and the adjusting range of the coupling strength of the signal transmission member 4 is increased.

Here, the depth of the second groove 51 refers to the dimension of the second groove 51 in the direction perpendicular to the inner bottom wall of the cavity 1, and the dimension of the second groove 51 refers to the dimension of the projected area of the second groove 51 in the direction perpendicular to the inner bottom wall of the cavity 1 in the direction of the inner bottom wall of the cavity 1.

The coupling rib 5 may be integrally formed with the base 2 or may be separately provided, which is not limited in this embodiment. Preferably, the coupling rib 5 and the cavity 1 are integrally formed, so that an installation procedure between the coupling rib 5 and the cavity 1 can be omitted, and the installation convenience and stability of the coupling rib 5 can be effectively ensured and improved. The material of the coupling rib 5 is a metal piece, and can be the same as the material of the cavity 1 or the base 2, or can be different, and the coupling rib can be specifically selected and arranged according to actual needs. For example, in an embodiment, the coupling rib 5, the base 2 and the cavity 1 may be integrally formed, at this time, the coupling rib 5, the base 2 and the cavity 1 are made of the same material, so that the three are convenient to integrally form, and thus, the connection of the filter can be simplified, the structural stability is improved, and meanwhile, the passive intermodulation is effectively reduced.

The second groove 51 can be integrally formed on the coupling rib 5 through a die, so that the manufacturing cost of the filter can be reduced, the manufacturing tolerance of the second groove 51 can be reduced, and the consistency of the coupling strength of the signal transmission piece 4 is improved; the processing procedure of the second groove 51 may be performed separately from the manufacturing procedure of the coupling rib 5, and may be selectively set according to actual needs.

In practical applications, the shape of the second groove 51 may be regular, such as square groove, rectangular groove, bar-shaped groove, V-shaped groove, etc., or irregular, and may be specifically selected according to practical needs. In some embodiments, the second groove 51 is a rectangular groove, which is easier to machine when the second groove 51 is machined by a cutter, and which is also easier to mold when the second groove 51 can be integrally molded on the coupling rib 5 by a mold.

In one embodiment, the signal transmission member 4 is removably coupled to the base 2 such that replacement is facilitated when the signal transmission member 4 fails. The detachable connection may be in a manner including, but not limited to, threaded connection, plugging, crimping, and clamping, which is not particularly limited in this embodiment.

Some embodiments of the present utility model further provide a communication device, including the filter provided by the embodiments of the present utility model. The communication device may be a simplex, a duplexer, a multiplexer, a combiner, an antenna, a base station, or the like. By adopting the scheme, the filter provided by the embodiment of the utility model can ensure that the communication equipment can realize higher performance.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The filter is characterized by comprising a cavity, a base arranged on the bottom wall in the cavity, a resonant rod arranged on the base and a signal transmission piece, wherein one end of the signal transmission piece is connected with the base, and the other end of the signal transmission piece is coupled and connected with an external signal source;

2. The filter of claim 1, wherein the cavity is provided with a signal transmission port communicated with the outside, and one end of the signal transmission member, which is away from the base, is arranged on the signal transmission port in a penetrating manner.

3. The filter of claim 2, wherein the signal transmission member and the projection of the signal transmission port onto the base along the direction of extension of the signal transmission member form an annular region, and the first recess is located in the annular region.

4. The filter of claim 2, wherein the first recess is an arcuate recess and the first recess conforms to the shape of the signal transmission port.

5. The filter of claim 2, wherein an annular protrusion is disposed on an outer side wall of the cavity, a mounting hole is formed in the annular protrusion and is communicated with the signal transmission port, and the signal transmission member is arranged in the mounting hole in a penetrating manner.

6. The filter of claim 5, further comprising a dielectric sleeve disposed between the inner wall of the signal transmission port and the outer periphery of the signal transmission member, and disposed between the inner wall of the mounting hole and the outer periphery of the signal transmission member.

7. The filter of any one of claims 1 to 6, further comprising a coupling rib disposed in the bottom wall of the cavity and connected to the base, wherein a second groove is formed in a side of the coupling rib adjacent to the base, and the second groove is located on a side of the coupling rib away from the base.

8. The filter of claim 7, wherein the second recess is a rectangular recess;

and/or, the base and the coupling rib are integrally formed.

9. A filter as claimed in any one of claims 1 to 6, wherein the signal transmission member is detachably connected to the base.

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