WO2019178870A1

WO2019178870A1 - Filter and communication device

Info

Publication number: WO2019178870A1
Application number: PCT/CN2018/080345
Authority: WO
Inventors: 吴文敬
Original assignee: 深圳市大富科技股份有限公司
Priority date: 2018-03-23
Filing date: 2018-03-23
Publication date: 2019-09-26
Also published as: CN110770970A

Abstract

The present application relates to the field of communications. Disclosed are a filter and a communication device. The filter comprises a filtering cavity, a cover plate, and a resonator. The cover plate covers the filtering cavity to form a housing in which a resonating cavity is provided. The resonator is provided inside the resonating cavity. An adjustment mechanism opposite to the resonator is provided on a wall of the housing. The adjustment mechanism is provided outside the resonating cavity and adjusts the frequency of the resonating cavity by adjusting the deformation of the wall where the adjustment mechanism is located. In this way, the effect of an adjustment mechanism on an index of a filter and the risk of a short circuit that would be easily caused by metal scraps generated by a resonator during an adjustment process can be reduced.

Description

Filter and communication device

[Technical Field]

The present application relates to the field of communications, and in particular to a filter and a communication device.

【Background technique】

A filter is a device that filters waves. The filter can effectively filter out the frequency of a specific frequency in the power line or the frequency outside the frequency to obtain a power signal of a specific frequency or eliminate the power signal after a specific frequency.

The frequency of debugging the filter through the screw structure is a common implementation of the filter industry. It is widely used in the industry. Many filters use the screw structure to debug the filter frequency. However, the existing structure, especially in 5G miniaturization. On the filter, adjusting the frequency by adjusting the screw into the cavity will cause the filter indicators such as insertion loss, power, PIM (passive intermodulation) to deteriorate, and metal debris will be generated during the debugging process. There is a risk of short circuits inside the cavity.

[Summary of the Invention]

The technical problem to be solved by the present application is to provide a filter and a communication device, which can solve the problem of deterioration of the index caused by the adjustment of the conventional filter adjusting screw into the cavity, and the problem that the metal debris generated by the resonator is likely to cause a short circuit during the adjustment process. .

In order to solve the above technical problem, a technical solution adopted by the present application is to provide a filter including a filter cavity, a cover plate and a resonator, and the cover plate is covered on the filter cavity to form a cavity therein. a housing, the resonator is disposed in the resonant cavity, wherein: a shell wall of the housing is provided with an adjusting mechanism opposite to the resonator, the adjusting mechanism is disposed outside the resonant cavity, and by adjusting the deformation of the shell wall where the shell is located To adjust the frequency of the resonant cavity.

In order to solve the above technical problem, another technical solution adopted by the present application is to provide a communication device, which includes a filter, the filter includes a filter cavity, a cover plate and a resonator, and the cover plate covers the filter cavity. Forming a housing with a resonant cavity therein, the resonator is disposed in the resonant cavity, and a casing wall of the casing is provided with an adjusting mechanism opposite to the resonator, and the adjusting mechanism is disposed outside the resonant cavity, and by adjusting the position thereof The deformation of the shell wall regulates the frequency of the cavity.

[Description of the Drawings]

Figure 1 is a cross-sectional view showing a first embodiment of the filter of the present application;

Figure 2 is an enlarged schematic view showing a portion A of the first embodiment of the filter of the present application;

Figure 3 is a cross-sectional view showing a second embodiment of the filter of the present application;

4 is an enlarged schematic view showing a portion B of a second embodiment of the filter of the present application;

Figure 5 is a cross-sectional view showing a third embodiment of the filter of the present application;

Figure 6 is an enlarged schematic view showing a portion C of the third embodiment of the filter of the present application;

Figure 7 is a cross-sectional view showing a fourth embodiment of the filter of the present application;

Figure 8 is an enlarged schematic view showing a portion D of the fourth embodiment of the filter of the present application;

FIG. 9 is a schematic structural diagram of an embodiment of a communication device of the present application.

【detailed description】

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present application. It is obvious that the embodiments described below are only a part of the embodiments of the present application, and not all of them. Example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

The conflicts in the following embodiments can be combined with each other.

1 is a cross-sectional view of a first embodiment of a filter of the present application.

As shown in FIG. 1 , the filter 100 includes a filter cavity 101 , a cover plate 102 , and a resonator 103 . The cover plate 102 covers the filter cavity 101 to form a housing with a resonant cavity 105 therein. The 103 is disposed in the cavity 105, and a casing wall of the casing is provided with an adjusting mechanism 104 opposite to the resonator 103. The adjusting mechanism 104 is disposed outside the cavity 105 and is adjusted by adjusting the deformation of the casing wall where the casing is located. The frequency of the resonant cavity 105 changes the capacitance between the cover 102 and the resonator 103 by changing the size of the gap between the cover 102 and the resonator 103, thereby adjusting the frequency of the resonant cavity 105.

As shown in FIG. 1 and FIG. 2, the resonator 103 is fixedly disposed at the bottom of the resonant cavity 105. The cover 102 is provided with a recess 1041. The adjusting mechanism 104 is disposed in the recess 1041, and the recess 1041 and the resonant cavity 105 are left. There is a bottom wall 1043 which is a portion of the bottom of the cover plate 102 and is a thin wall at the bottom of which the recess 1041 is dug. The adjustment mechanism 104 can adjust axial movement along the resonator 103 within the recess 1041 to deform at least the bottom wall 1043.

The adjustment mechanism 104 is integrally disposed in the recess 1041.

The groove 1041 is a threaded groove 1041, the adjusting mechanism 104 is an adjusting screw 1042, the adjusting screw 1042 is disposed in the threaded groove 1041, the adjusting screw 1042 can be adjusted by the screw groove 1041, and the screw 1042 can be adjusted in other manners.

The bottom wall 1043 has a thickness of 0.2 mm to 0.8 mm.

The resonator 103 is fixed to the bottom of the filter chamber 101 by a fixing screw 106. The fixing screw 106 passes through the inside or the outside of the filter cavity 101 through the bottom of the filter cavity 101, and cooperates with the bottom of the resonator 103 to fix the resonator 103 on the filter cavity 101.

The fixing screw 106 fixes the cover plate 102 by crimping, welding or riveting.

The cover plate 102 can be a rectangular cover plate 102 or a cover plate 102 of any other shape.

The above embodiments are merely illustrative and do not limit the scope of protection of the present application. In other embodiments, the number of resonators 103 and adjustment mechanisms 104 may be fewer or more. Each resonator 103 is correspondingly provided with an adjustment mechanism 104, and the plurality of resonators 103 are provided with a plurality of adjustment mechanisms 104.

Figure 3 is a cross-sectional view of a second embodiment of the filter of the present application.

As shown in FIG. 3, the filter 200 includes a filter cavity 201, a cover plate 202, and a resonator 203. The cover plate 202 covers the filter cavity 201 to form a housing with a resonant cavity 205 therein. The 203 is disposed in the resonant cavity 205, and a casing wall of the casing is provided with an adjusting mechanism 204 opposite to the resonator 203. The adjusting mechanism 204 is disposed outside the resonant cavity 205 and is adjusted by adjusting the deformation of the casing wall where the casing is located. The frequency of the resonant cavity 205 changes the capacitance between the bottom of the filter cavity 201 and the resonator 203 by changing the size of the gap between the bottom of the filter cavity 201 and the resonator 203, thereby adjusting the frequency of the resonant cavity 205.

As shown in FIG. 3 and FIG. 4, the resonator 203 is fixedly disposed on a side of the cover plate 202 facing the resonant cavity 205. The bottom of the resonant cavity 205 is provided with a groove 2041. The adjusting mechanism 204 is disposed in the groove 2041, and the groove 2041 is A bottom wall 2043 is left between the resonant cavities 205. The bottom wall 2043 is a portion of the bottom of the cover plate 102 and is a thin wall at the bottom of the recess 2041. The adjustment mechanism 204 can adjust the movement axially along the resonator 203 within the groove 2041 to deform at least the bottom wall 2043.

The adjustment mechanism 204 is integrally disposed in the recess 2041.

The groove 2041 is a threaded groove 2041, the adjusting mechanism 204 is an adjusting screw 2042, and the adjusting screw 2042 is disposed in the threaded groove 2041 to adjust the adjusting screw 2042 by the screw groove 2041. The screw 2042 can also be adjusted in other manners.

The bottom wall 2043 has a thickness of 0.2 mm to 0.8 mm. The resonator 203 is fixed to the side of the cover plate 202 toward the inside of the filter cavity 201 by a fixing screw 206.

The set screw 206 passes through the cover plate 202 from the inside or the outside of the cover plate 202, and cooperates with the bottom of the resonator 203 to fix the resonator 203 to the cover plate 202.

The set screw 206 secures the cover plate 202 by crimping, welding or riveting.

The cover plate 202 can be a rectangular cover plate 202 or a cover plate 202 of any other shape.

The above embodiments are merely illustrative and do not limit the scope of protection of the present application. In other embodiments, the number of resonators 203 and adjustment mechanisms 204 may be less or more. Each resonator 203 is correspondingly provided with an adjustment mechanism 204, and the plurality of resonators 203 are provided with a plurality of adjustment mechanisms 204.

Figure 5 is a cross-sectional view of a third embodiment of the filter of the present application.

As shown in FIG. 5, the filter 300 includes a filter cavity 301, a cover plate 302, a resonator 303, and a connector 305. The cover plate 302 covers the filter cavity 301 to form a cavity having a cavity 306 therein. The resonator 303 is disposed in the cavity 306, and a casing wall of the casing is provided with an adjusting mechanism 304 opposite to the resonator 303. The adjusting mechanism 304 is disposed outside the cavity 306 and adjusts the wall of the casing The deformation is used to adjust the frequency of the resonant cavity 306. By changing the size of the gap between the cover plate 302 and the resonator 303, the capacitance value between the cover plate 302 and the resonator 303 is changed, thereby adjusting the frequency of the resonant cavity 306.

The connector 305 is disposed on the filter cavity 301.

As shown in FIG. 5 and FIG. 6, the resonator 303 is fixedly disposed at the bottom of the resonant cavity 306. The cover 302 is provided with a recess 3041. The adjusting mechanism 304 is disposed in the recess 3041, and the recess 3041 is left between the recess 306 and the resonant cavity 306. There is a bottom wall 3043 which is a portion of the bottom of the cover plate 302 and is a thin wall at the bottom of which the recess 3041 is left. The adjustment mechanism 304 can adjust the movement axially along the resonator 303 within the recess 3041 to deform at least the bottom wall 3043.

The adjustment mechanism 304 is integrally disposed in the recess 3041.

The groove 3041 is a threaded groove 3041, the adjusting mechanism 304 is an adjusting screw 3042, and the adjusting screw 3042 is disposed in the threaded groove 3041 to adjust the adjusting screw 3042 by the screw groove 3041. The screw 3042 can also be adjusted in other manners.

The bottom wall 3043 has a thickness of 0.2 mm to 0.8 mm.

The resonator 303 is fixed to the bottom of the filter chamber 301 by a fixing screw 307. The fixing screw 307 passes through the bottom of the filter cavity 301 from the inside or the outside of the filter cavity 301, and cooperates with the bottom of the resonator 303 to fix the resonator 303 on the filter cavity 301.

The fixing screw 307 fixes the cover plate 302 by crimping, welding or riveting.

The resonator 303 is disposed at the bottom of the filter cavity 301, and the adjustment mechanism 304 is disposed on the cover plate 302.

The cover plate 302 can be a rectangular cover plate 302 or a cover plate 302 of any other shape.

The above embodiments are merely illustrative and do not limit the scope of protection of the present application. In other embodiments, the number of resonators 303 and adjustment mechanisms 304 may be fewer or more. Each resonator 303 is correspondingly provided with an adjustment mechanism 304, and the plurality of resonators 303 are provided with a plurality of adjustment mechanisms 304.

Figure 7 is a cross-sectional view of a fourth embodiment of the filter of the present application.

As shown in FIG. 7, the filter 400 includes a filter cavity 401, a cover 402, a resonator 403, and a connector 405. The cover 402 is capped on the filter cavity 401 to form a cavity having a cavity 406 therein. The resonator 403 is disposed in the cavity 406, and a casing wall of the casing is provided with an adjusting mechanism 404 opposite to the resonator 403. The adjusting mechanism 404 is disposed outside the cavity 406 and adjusts the wall of the casing The deformation is used to adjust the frequency of the resonant cavity 406. By changing the size of the gap between the bottom of the filter cavity 401 and the resonator 403, the capacitance value between the bottom of the filter cavity 401 and the resonator 403 is changed, thereby adjusting the resonant cavity 406. Frequency of.

The connector 405 is disposed on the filter cavity 401.

As shown in FIG. 7 and FIG. 8 , the resonator 403 is fixedly disposed on a side of the cover 402 facing the resonant cavity 406 . The bottom of the resonant cavity 406 is provided with a groove 4041 . The adjusting mechanism 404 is disposed in the groove 4041 , and the groove 4041 is A bottom wall 4043 is left between the resonant cavities 406. The bottom wall 4043 is a portion of the bottom of the cover plate 402 and is a thin wall at the bottom of the recess 4041. The adjustment mechanism 404 can adjust axial movement along the resonator 403 within the recess 4041 to deform at least the bottom wall 4043.

The adjustment mechanism 404 is integrally disposed in the recess 4041.

The groove 4041 is a threaded groove 4041, the adjusting mechanism 404 is an adjusting screw 4042, and the adjusting screw 4042 is disposed in the threaded groove 4041 to adjust the adjusting screw 4042 by the screw groove 4041. The screw 4042 can also be adjusted in other manners.

The bottom wall 4043 has a thickness of 0.2 mm to 0.8 mm.

The resonator 403 is disposed on the cover 402, and the adjustment mechanism 404 is disposed at the bottom of the filter cavity 401.

The resonator 403 is fixed to the side of the cover 402 facing the inside of the filter cavity 201 by a fixing screw 407.

A set screw 407 passes through the cover 402 from the inside or the outside of the cover 402, and cooperates with the bottom of the resonator 403 to fix the resonator 403 to the cover 402.

The fixing screw 407 fixes the cover 402 by crimping, welding or riveting.

The cover plate 402 can be a rectangular cover plate 402, or can be any other shape of the cover plate 402.

The above embodiments are merely illustrative and do not limit the scope of protection of the present application. In other embodiments, the number of resonators 403 and adjustment mechanisms 404 may be fewer or more, each resonator 403 is correspondingly provided with an adjustment mechanism 404, and the plurality of resonators 403 are provided with a plurality of adjustment mechanisms 404.

As shown in FIG. 9, the present application further provides a communication device 600, which includes a filter 500, which is a filter in any of the above embodiments.

The present application provides a filter including a filter cavity, a cover plate and a resonator. The cover plate is capped on the filter cavity to form a housing having a resonant cavity therein, and the resonator is disposed in the resonant cavity. The utility model is characterized in that: a shell wall of the casing is provided with an adjusting mechanism opposite to the resonator, the adjusting mechanism is arranged outside the resonant cavity, and the frequency of the resonant cavity is adjusted by adjusting the deformation of the shell wall where the casing is located. Since the adjustment structure of the filter is disposed outside the cavity, the influence of the adjustment mechanism on the filter index and the risk of short circuit easily caused by the metal debris generated by the resonator during the adjustment are reduced.

It is to be noted that the above description is only an embodiment of the present application, and thus does not limit the scope of the patent application, and the equivalent structure or equivalent flow transformation made by the specification and the drawings of the present application, for example, the technology between the embodiments The combination of features, or directly or indirectly, in other related technical fields is included in the scope of patent protection of the present application.

Claims

A filter, the filter includes a filter cavity, a cover plate and a resonator, the cover plate is capped on the filter cavity to form a housing having a resonant cavity, and the resonator is disposed on the Within the cavity, it is characterized by:

An adjusting mechanism opposite to the resonator is disposed on a casing wall of the casing, the adjusting mechanism is disposed outside the resonant cavity, and the resonance is adjusted by adjusting deformation of the casing wall where the casing is located The frequency of the cavity.
The filter of claim 1 wherein:

The resonator is fixedly disposed at the bottom of the cavity, the cover plate is provided with a groove, the adjusting mechanism is disposed in the groove, and a bottom wall is left between the groove and the resonant cavity. The adjustment mechanism can adjust the movement in the groove along the axial direction of the resonator to deform at least the bottom wall.
The filter of claim 1 wherein:

The resonator is fixedly disposed on a side of the cover plate facing the resonant cavity, a bottom of the resonant cavity is provided with a groove, and the adjusting mechanism is disposed in the groove, and the groove is disposed between the cavity and the resonant cavity There is a bottom wall, and the adjustment mechanism is adjustable in the groove along the axial direction of the resonator to deform at least the bottom wall.
A filter according to claim 2 or 3, wherein said adjustment mechanism is integrally disposed in said recess.
A filter according to claim 2 or 3, wherein said groove is a threaded groove, said adjusting mechanism is an adjusting screw, and said adjusting screw is disposed in said threaded groove.
A filter according to claim 2 or 3, wherein said bottom wall has a thickness of from 0.2 mm to 0.8 mm.
A filter according to claim 2, wherein said resonator is fixed to the bottom of said filter chamber by a fixing screw.
A filter according to claim 3, wherein said resonator is fixed to said cover by a fixing screw.
A filter according to any one of claims 7 or 8, wherein the fixing screw is fixed by crimping, welding or riveting.
A communication device, characterized in that: the communication device comprises a filter, the filter comprises a filter cavity, a cover plate and a resonator, and the cover plate covers the filter cavity to form a cavity therein The housing is disposed in the resonant cavity, and a casing wall of the casing is provided with an adjusting mechanism opposite to the resonator, and the adjusting mechanism is disposed outside the resonant cavity, and The frequency of the resonant cavity is adjusted by adjusting the deformation of the shell wall in which it is located.
The communication device according to claim 10, wherein the resonator is fixedly disposed at a bottom of the cavity, the cover plate is provided with a groove, and the adjusting mechanism is disposed in the groove, the concave A bottom wall is left between the slot and the resonant cavity, and the adjusting mechanism is axially adjustable to move along the resonator within the recess to deform at least the bottom wall.
The communication device according to claim 10, wherein the resonator is fixedly disposed on a side of the cover plate facing the resonant cavity, the bottom of the resonant cavity is provided with a groove, and the adjusting mechanism is disposed in the groove A bottom wall is left between the groove and the resonant cavity, and the adjusting mechanism can adjust the movement in the groove along the axial direction of the resonator to deform at least the bottom wall.
A communication device according to claim 11 or 12, wherein said adjustment mechanism is integrally disposed in said recess.
A communication device according to claim 11 or 12, wherein said recess is a threaded recess, said adjustment mechanism is an adjustment screw, and said adjustment screw is disposed in said threaded recess.
A communication device according to claim 11 or 12, wherein said bottom wall has a thickness of from 0.2 mm to 0.8 mm.
The communication device according to claim 11, wherein said resonator is fixed to a bottom of said filter chamber by a fixing screw.
The communication device according to claim 12, wherein said resonator is fixed to said cover by a fixing screw.
The communication device according to any one of claims 16 or 17, wherein the fixing screw is fixed by crimping, welding or riveting.