CN115101908B - Metal filter and assembling method thereof - Google Patents
Metal filter and assembling method thereof Download PDFInfo
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- CN115101908B CN115101908B CN202210735586.0A CN202210735586A CN115101908B CN 115101908 B CN115101908 B CN 115101908B CN 202210735586 A CN202210735586 A CN 202210735586A CN 115101908 B CN115101908 B CN 115101908B
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- 239000002184 metal Substances 0.000 title claims abstract description 141
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000002955 isolation Methods 0.000 claims description 43
- 238000005476 soldering Methods 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 14
- 230000008054 signal transmission Effects 0.000 claims description 14
- 210000003205 muscle Anatomy 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 7
- 238000004512 die casting Methods 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000009987 spinning Methods 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims description 3
- 238000000641 cold extrusion Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 230000006854 communication Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/007—Manufacturing frequency-selective devices
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a metal filter and an assembling method thereof, wherein all parts of the metal filter are assembled without fastening parts, the metal filter comprises a metal cover body and a base which are arranged up and down oppositely, the lower peripheral edge of the metal cover body is connected with the base, and the space inside the metal cover body and the base forms a cavity of the filter; the base upper surface is equipped with the pillar of bellied assembly resonator that makes progress, and the upper portion of pillar is equipped with radial first step post that narrows, and first step post upper surface is equipped with the blind hole, and the resonator is equipped with first through-hole for the outside at first step post is established to the resonator cover, and the lateral wall of the blind hole on the first step post has radial outwards protruding structure, so that resonator and pillar fixed connection. According to the invention, the sheet resonator of the filter is fixed on the corresponding post of the base in a riveting mode, the metal cover is fixed on the base in a riveting mode, the volume is small, the weight is light, and the product can maintain stable performance even being subjected to a high-temperature environment.
Description
Technical Field
The invention relates to the field of communication frequency modulation, in particular to a metal filter and an assembly method thereof.
Background
The metal cavity filter is an important component in the communication base station equipment all the time, and has the function of filtering clutter signals generated in the communication process, so that the communication is more stable, and compared with other types of filters, the cavity filter has the advantages of stable performance, high Q value, small volume, good heat dissipation and the like, so that the metal cavity filter is widely applied to the communication base station.
With the continuous development of communication technology, base station equipment is continuously upgraded and updated, performance is continuously improved, size and weight are continuously reduced, particularly in 5G communication, a current 5G base station mainly comprises an array antenna, and the array antenna mainly comprises an antenna array and a filter, so that the size and weight of the filter play a key role in the size and weight of the whole array antenna.
The current mounting mode of the metal filter used in the array antenna is usually to mount the metal filter by adopting a screw fixing mode, so that the size and the weight of the filter are not compressed in space, and in order to further reduce the size and the weight, the filter is mounted by adopting a soldering surface mount mode, and the surface mount mode reduces the size and the weight to a certain extent, but other defects are introduced, such as that when the metal filter is subjected to a high-temperature environment, such as reflow soldering (the highest temperature of the traditional reflow soldering reaches 260 ℃ and even higher), the metal filter in the current market cannot meet the process requirement (the performance of a product is greatly changed after the high-temperature reflow soldering and cannot meet the performance requirement).
The above disclosure of background art is only for aiding in understanding the inventive concept and technical solution of the present invention, and it does not necessarily belong to the prior art of the present patent application, nor does it necessarily give technical teaching; the above background should not be used to assess the novelty and creativity of the present application without explicit evidence that the above-mentioned content was disclosed prior to the filing date of the present patent application.
Disclosure of Invention
The invention aims to provide a metal filter with small volume and light weight and a filter assembling method by replacing a screw fixing mode by a riveting mode, so that a product can maintain stable performance even in a high-temperature environment.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the metal filter comprises a metal cover body and a base which are arranged up and down oppositely, wherein the metal cover body comprises a top plate and a side wall which surrounds the top plate, the side wall extends downwards, the lower periphery of the side wall is connected with the base, and a space inside the metal cover body and the base forms a cavity of the filter;
the base upper surface is equipped with the bellied pillar that makes progress, and it is configured to assemble the resonator, the upper portion of pillar is equipped with radial narrowed first step post, just first step post upper surface is equipped with the blind hole, the resonator is equipped with first through-hole, makes the resonator cover is established the outside of first step post, just the lateral wall of blind hole on the first step post has radial outwards protruding structure, so that the resonator with pillar fixed connection.
Further, the base upper surface still is equipped with the bellied isolation muscle post that makes progress, the upper portion of isolation muscle post is equipped with the second step post of narrowing structure, just second step post upper surface is equipped with the blind hole, be equipped with on the roof of the metal cover body with the second through-hole of second step post looks adaptation, the second through-hole with isolation muscle post one-to-one, just the second step post of isolation muscle post is at least partly held in the second through-hole, the lateral wall of the blind hole on the second step post has the structure of outwards protruding, so that the metal cover body with isolation muscle post fixed connection.
Further, the resonator and the support column are fixedly connected without adopting a soldering mode or a locking screw mode; and/or the number of the groups of groups,
the isolating rib column is fixedly connected with the metal cover body in a soldering mode or a locking screw mode.
Further, a bevel angle guiding structure is arranged at the upper part of the first through hole of the resonator so as to accommodate the structure that the side wall of the blind hole on the first step post protrudes outwards in the radial direction.
Further, a bevel angle guiding structure is arranged at the upper part of the second through hole of the metal cover body so as to accommodate the structure of outwards protruding side walls of the blind holes on the second step columns of the isolation rib columns.
Further, a plurality of third through holes and frequency adjusting screws are further arranged on the top plate of the metal cover body, the third through holes and the frequency adjusting screws are in one-to-one correspondence with the resonators and are arranged up and down oppositely, and the frequency adjusting screws are arranged in the third through holes.
Further, a plurality of fourth through holes and coupling adjusting screws which are in one-to-one correspondence are further arranged on the top plate of the metal cover body, and the coupling adjusting screws are arranged in the fourth through holes.
Further, the inner wall of the lower end of the side wall of the metal cover body is provided with a step structure matched with the base, so that the metal cover body and the edge of the base are riveted at one circle.
Further, two signal transmission rods are further arranged on the base, the two signal transmission rods are respectively arranged on the outer sides of resonators on the outermost sides in the length direction of the metal filter, and the upper ends of the signal transmission rods are respectively bent towards the corresponding resonators or the corresponding support columns of the resonators.
Further, the upper surface of the resonator is flush with the upper surface of the first step post, or the upper surface of the resonator is higher than the upper surface of the first step post;
the upper surface of the metal cover body is flush with the upper surface of the isolation rib column, or the upper surface of the metal cover body is higher than the upper surface of the isolation rib column.
According to another aspect of the present invention, there is provided an assembling method of a metal filter, comprising the steps of:
the base of the metal filter is manufactured by adopting a die casting or cold extrusion process, wherein a support column and an isolation rib column which are integrally formed with the base are arranged on the base, step columns with narrowing structures are arranged on the upper parts of the support column and the isolation rib column, and blind holes are formed in the upper surfaces of the step columns; manufacturing a resonator, and forming a first through hole on the resonator; manufacturing a metal cover body of the metal filter, and forming a second through hole matched with the isolation rib column on the metal cover body;
sleeving the first through hole of the resonator on the step post of the support post, and spinning the blind hole on the step post of the support post until the resonator is riveted on the step post of the support post;
the metal cover body is covered on the base, so that the second through holes are sleeved on the step columns of the isolation rib columns, and blind holes on the step columns of the isolation rib columns are spun until the metal cover body is riveted on the step columns of the isolation rib columns; and the metal cover body is fixedly connected with the base.
The technical scheme provided by the invention has the following beneficial effects:
a. the sheet resonator of the metal filter can be fixed on the corresponding post of the base in a riveting mode, then the metal cover is fixed on the base in a riveting mode, and the metal cover and the sheet resonator are fixed in a riveting mode, so that the product has more stable performance in a high-temperature environment (such as reflow soldering);
b. the metal cover and the sheet resonator are fixed in a riveting mode, so that screw fixation is not needed, and the size and weight of the filter are reduced;
c. the metal cover and the sheet resonator can be manufactured in a sheet metal mode, the base can be manufactured through an extrusion process, compared with the traditional metal filter cavity die-casting forming process, the manufacturing cost is greatly reduced, the manufacturing process precision of the product component is improved, the consistency in the product manufacturing process is high, and the manufacturing yield can be greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is an exploded view of a metal filter according to an exemplary embodiment of the present invention;
fig. 2 is a schematic perspective view of a base of a metal filter according to an exemplary embodiment of the present invention;
FIG. 3 is a top view of a metal housing of a metal filter provided in an exemplary embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a resonator of a metal filter according to an exemplary embodiment of the present invention.
Wherein, the reference numerals include: 100-metal cover body, 110-second through hole, 120-third through hole, 130-fourth through hole, 200-base, 210-pillar, 2101-first step pillar, 220-resonator, 2201-first through hole, 230-isolation rib pillar, 2301-second step pillar, 310-frequency tuning screw, 320-coupling tuning screw, 330-signal transmission rod and 340-positioning pillar.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or device.
The invention aims to provide a metal cavity filter which can solve the problems of size and weight of the filter and can avoid the problem of performance degradation after high-temperature reflow soldering.
In one embodiment of the present invention, there is provided a metal filter, in which components are assembled without fastening parts such as screws, bolts, etc., as shown in fig. 1, the metal filter includes a metal housing 100 and a base 200 disposed opposite to each other up and down, wherein the metal housing 100 includes a top plate and a sidewall surrounding the top plate and extending downward, the metal housing 100 is mounted on the base 200, that is, a lower peripheral edge of the sidewall of the metal housing 100 is connected to the base 200, and a space inside the metal housing 100 and the base 200 forms a cavity of the filter.
As shown in fig. 2, the upper surface of the base 200 is provided with an upward protruding pillar 210, which is configured to assemble the resonator 220 shown in fig. 1 and 4, referring to fig. 1 and 2, the upper portion of the pillar 210 is provided with a radially narrowed first step pillar 2101, the step height of which is defined according to the thickness and height of the resonator, and the upper surface of the first step pillar 2101 is provided with a blind hole, referring to fig. 1 and 4, the resonator 220 is provided with a first through hole 2201, so that the resonator 220 is sleeved on the outer side of the first step pillar 2101, and the blind hole on the first step pillar 2101 is spun by, for example, a spinning tool, so that the material on the periphery of the blind hole is extruded to the periphery, that is, the side wall of the blind hole forms a radially outward protruding structure, so that the resonator 220 is fixedly connected, particularly, riveted and fixed, with the pillar 210.
With continued reference to fig. 2, the upper surface of the base 200 is further provided with an upwardly protruding isolation rib 230, which is specifically disposed between the two resonators 220 (the support columns 210), the upper portion of the isolation rib 230 is provided with a second step post 2301 with a narrowed structure, the step height of the second step post is defined according to the thickness of the top plate of the metal cover 100, and the upper surface of the second step post 2301 is provided with a blind hole; referring to fig. 1 and 3, a top plate of the metal cover 100 is provided with a second through hole 110 adapted to the second step column 2301, the second through holes 110 are in one-to-one correspondence with the isolation rib columns 230, and the second step column 2301 of the isolation rib columns 230 is at least partially accommodated in the second through hole 110. The blind hole on the second step column 2301 is spun by, for example, a spinning tool, so that the material on the peripheral side of the blind hole is extruded to the outer periphery, that is, the side wall of the blind hole on the second step column 2301 forms a structure protruding outwards, so that the metal cover body 100 is fixedly connected with the spacer rib column 230, specifically, is riveted and fixed.
The riveting and fixing modes can be seen: resonator 220 is fixedly connected with post 210 without soldering or locking screws; the spacer rib 230 is not fixedly connected with the metal cover 100 by soldering or locking screws, which has the advantages of overcoming the disadvantages caused by soldering or locking screws: the screw locking mode is time-consuming and labor-consuming to operate, and causes the size and weight of the filter to be free of compression space; although the manner of soldering the surface mount can reduce the size and weight, the temperature of the surface mount process is high (the highest temperature of the traditional reflow soldering reaches 260 ℃), which generally causes great variation in the product performance of the metal filter after the high-temperature reflow soldering. The metal filter provided by the embodiment of the invention can reduce the size and the weight, simultaneously avoid large performance change of a metal filter product caused by high temperature, and has simpler assembly steps.
The lower surface of the base 200 is also provided with a plurality of welding bosses which can be matched with the bonding pads on the client AFU PCB for welding.
As shown in fig. 4, the upper portion of the first through hole 2201 of the resonator 220 is provided with a bevel structure, the upper aperture of the first through hole 2201 is in an enlarged structure in the bottom-up direction, the lower aperture can be kept unchanged, since the first step pillar 2101 of the pillar 210 extends into the first through hole 2201 of the resonator 220 from bottom to top, and the upper surface of the first step pillar 2101 enters the enlarged structure, when the blind hole on the upper surface of the first step pillar 2101 is spun to press the material on the periphery of the blind hole to the periphery, the upper space of the first through hole 2201 accommodates the structure that the side wall of the blind hole on the first step pillar 2101 protrudes radially outwards, and the outer diameter of the outer wall of the protruding first step pillar 2101 protruding towards the periphery is larger than the lower aperture of the first through hole 2201, so that the first step pillar 2101 of the pillar 210 cannot be separated from the resonator 220, and the riveted connection is realized.
Similarly, a bevel structure is disposed at the upper portion of the second through hole 110 of the metal cover 100 to accommodate the outwardly protruding structure of the side wall of the blind hole on the second step column 2301 of the isolation rib column 230, and the outer diameter of the outer wall of the second step column 2301 protruding towards the outer periphery is larger than the lower aperture of the second through hole 110, so that the second step column 2301 of the isolation rib column 230 cannot be separated from the metal cover 100, and thus a riveted and fixed connection is achieved.
The inner wall of the lower end of the side wall of the metal cover 100 in this embodiment is provided with a step structure that is matched with the base 200, the step structure surrounds the base 200 for a circle in a state that the metal cover 100 is covered on the base 200, and the lower edge of the step structure is lower than the lower surface of the base, so that an inward force is applied to the lower edge of the step structure to buckle the lower surface edge of the base, so that the metal cover 100 and the edge of the base 200 are riveted for a circle, and the riveting and fixed connection between the metal cover 100 and the base 200 is realized.
As shown in fig. 1, the top plate of the metal cover 100 is further provided with a plurality of third through holes 120 and frequency tuning screws 310, the third through holes 120 and the frequency tuning screws 310 are in one-to-one correspondence with the resonators 220 and are arranged up and down oppositely, and the frequency tuning screws 310 are arranged in the third through holes 120; the top plate of the metal cover 100 is further provided with a plurality of fourth through holes 130 and coupling adjusting screws 320, which are in one-to-one correspondence, and the coupling adjusting screws 320 are disposed in the fourth through holes 130.
Further, two signal transmission rods 330 are further disposed on the base 200, the two signal transmission rods 330 are respectively disposed on the outer sides of the resonators 220 that are the outermost in the length direction of the metal filter, and the upper ends of the signal transmission rods 330 are respectively bent toward the corresponding resonators 220 or the corresponding pillars 210 of the resonators 220. The illustrated signaling rod 330 is assembled as follows: the positioning columns 340 are arranged on the signal transmission rods 330 in one-to-one correspondence, through holes for the upper ends of the positioning columns 340 to pass through from bottom to top are arranged on the base 200, and the positioning columns 340 are in interference fit with the through holes; the upper surface of the positioning column 340 is provided with a blind hole, the bottom of the signal transmission rod 330 is in interference fit with the blind hole of the positioning column 340, and then the signal transmission rod 330 is bent towards the resonator 220 at the outermost side.
In one possible embodiment of the present invention, the upper surface of the resonator 220 is flush with the upper surface of the first stepped post 2101 or the upper surface of the resonator 220 is higher than the upper surface of the first stepped post 2101;
the upper surface of the metal cap 100 is flush with the upper surface of the spacer rib 230 or the upper surface of the metal cap 100 is higher than the upper surface of the spacer rib 230.
In one embodiment of the present invention, there is provided an assembling method of a metal filter, including the steps of:
the base of the metal filter is manufactured by adopting a die casting or cold extrusion process, wherein a support column and an isolation rib column which are integrally formed with the base are arranged on the base, step columns with narrowing structures are arranged on the upper parts of the support column and the isolation rib column, and blind holes are formed in the upper surfaces of the step columns; manufacturing a resonator, and forming a first through hole on the resonator; manufacturing a metal cover body of the metal filter, and forming a second through hole matched with the isolation rib column on the metal cover body;
sleeving the first through hole of the resonator on the step post of the support post, and spinning the blind hole on the step post of the support post until the resonator is riveted on the step post of the support post;
the metal cover body is covered on the base, so that the second through holes are sleeved on the step columns of the isolation rib columns, and blind holes on the step columns of the isolation rib columns are spun until the metal cover body is riveted on the step columns of the isolation rib columns; and the metal cover body is fixedly connected with the base.
Specifically, be equipped with on the inner wall of the lateral wall lower extreme of the metal cover body with base complex step structure, under the state that the metal cover body covers on the base, this step structure encircles the base a week to the lower border of this step structure is less than the lower surface of base, exerts inwards direction's power to the lower border of this step structure in order to withhold the lower surface edge of base, so that the metal cover body with base edge a week rivets, realizes the riveting fixed connection of metal cover body and base.
As shown in fig. 4, the first through hole 2201 of the resonator 220 is processed into a structure that the upper portion of the first through hole 2201 is provided with a bevel angle, the upper aperture of the first through hole 2201 is in an enlarged structure in the direction from bottom to top, the lower aperture can be kept unchanged, since the first step pillar 2101 of the pillar 210 extends into the first through hole 2201 of the resonator 220 from bottom to top, and the upper surface of the first step pillar 2101 enters into the enlarged structure, when the blind hole on the upper surface of the first step pillar 2101 is spun, the material on the periphery of the blind hole is extruded to the periphery, therefore, the upper space of the first through hole 2201 accommodates the structure that the side wall of the blind hole on the first step pillar 2101 protrudes radially outwards, and the outer diameter of the outer wall extruded to the periphery of the first step pillar 2101 is larger than the lower aperture of the first through hole 2201, therefore, the first step pillar 2101 of the pillar 210 cannot be separated from the resonator 220, and the riveted fixed connection is realized.
Similarly, the upper portion of the second through hole 110 of the metal cover 100 is processed into a structure with a bevel angle so as to accommodate the outward protruding structure of the side wall of the blind hole on the second step column 2301 of the isolation rib column 230, and the outer diameter of the outer wall of the second step column 2301 protruding towards the outer periphery is larger than the lower aperture of the second through hole 110, so that the second step column 2301 of the isolation rib column 230 cannot be separated from the metal cover 100, and the riveting and fixing connection are realized.
In addition, a step structure matched with the base 200 is machined on the inner wall of the lower end of the side wall of the metal cover 100, the step structure surrounds the base 200 for one circle in a state that the metal cover 100 is covered on the base 200, and the lower edge of the step structure is lower than the lower surface of the base, so that the lower edge of the step structure is applied with inward force to buckle the edge of the lower surface of the base, the metal cover 100 and the edge of the base 200 are riveted for one circle, and the riveting fixed connection between the metal cover 100 and the base 200 is realized.
In one embodiment of the present invention, a third through hole 120 is formed in a region of the top plate of the metal cover 100 opposite to the resonator 220, and the frequency tuning screw 310 is screwed into the third through hole 120; a plurality of fourth through holes 130 are processed on the top plate of the metal cover body 100, and coupling adjusting screws 320 are screwed into the fourth through holes 130.
In addition, a through hole is respectively formed in the left and right side areas of the base 200, the upper end of the positioning column 340 passes through the through hole from bottom to top, and the positioning column 340 is in interference fit with the through hole; the bottom of the signal transmission rod 330 is interference fit with the blind hole of the positioning post 340, and then the signal transmission rod 330 is bent toward the resonator 220 at the outermost side.
The assembly method embodiment of the metal filter of the present invention has the same inventive concept as the above-described metal filter embodiment, and the entire or partial contents of the metal filter embodiment are incorporated herein by reference into the present assembly method embodiment.
According to the small cavity metal filter provided by the invention, the sheet resonator can be fixed on the corresponding column of the base in a riveting mode, then the metal cover is fixed on the base in a riveting mode, and as the metal cover and the sheet resonator are fixed in the riveting mode, the product has more stable performance in a high-temperature environment (such as reflow soldering); in addition, the metal cover and the sheet resonator can be manufactured in a sheet metal mode, and the base can be manufactured through an extrusion process, so that the manufacturing cost is greatly reduced compared with that of the traditional metal filter cavity die-casting forming process, the manufacturing process precision of the product component is improved, the consistency in the product manufacturing process is high, and the manufacturing yield can be greatly improved.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely exemplary of the application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the application and are intended to be comprehended within the scope of the application.
Claims (10)
1. The metal filter is characterized in that all parts of the metal filter are assembled without fastening parts, the metal filter comprises a metal cover body (100) and a base (200) which are arranged oppositely up and down, wherein the metal cover body (100) comprises a top plate and a side wall which surrounds the top plate, the side wall extends downwards along the periphery of the top plate, the lower periphery of the side wall is connected with the base (200), and a space inside the metal cover body (100) and the base (200) forms a cavity of the filter;
the upper surface of the base (200) is provided with an upward protruding support column (210) which is configured to be used for assembling a resonator (220), the upper part of the support column (210) is provided with a first step column (2101) which is radially narrowed, the upper surface of the first step column (2101) is provided with a blind hole, the resonator (220) is provided with a first through hole (2201), the resonator (220) is sleeved outside the first step column (2101), and the side wall of the blind hole on the first step column (2101) is provided with a structure which protrudes outwards in a radial direction, so that the resonator (220) is fixedly connected with the support column (210);
the base (200) upper surface still is equipped with bellied isolation muscle post (230) that makes progress, the upper portion of isolation muscle post (230) is equipped with second step post (2301) of narrowing structure, just second step post (2301) upper surface is equipped with the blind hole, be equipped with on the roof of metal cover body (100) with second through-hole (110) of second step post (2301) looks adaptation, second through-hole (110) with isolation muscle post (230) one-to-one, just second step post (2301) of isolation muscle post (230) at least part holding is in second through-hole (110), the lateral wall of blind hole on second step post (2301) has outwards outstanding structure, so that metal cover body (100) with isolation muscle post (230) fixed connection.
2. The metal filter according to claim 1, characterized in that the resonator (220) is fixedly connected to the post (210) without soldering or locking screws; and/or the number of the groups of groups,
the isolation rib column (230) is fixedly connected with the metal cover body (100) in a soldering mode or a locking screw mode.
3. The metal filter of claim 1, wherein an upper portion of the first through hole (2201) of the resonator (220) is provided with a bevel angle structure to accommodate a radially outwardly protruding structure of a sidewall of a blind hole on the first stepped post (2101).
4. The metal filter according to claim 1, wherein an upper portion of the second through hole (110) of the metal cap body (100) is provided with a bevel angle structure to accommodate an outwardly protruding structure of a sidewall of a blind hole on the second stepped post (2301) of the spacer rib post (230).
5. The metal filter according to claim 1, wherein a plurality of third through holes (120) and frequency tuning screws (310) are further arranged on the top plate of the metal cover body (100), the third through holes (120) and the frequency tuning screws (310) are in one-to-one correspondence with the resonators (220) and are arranged in an up-down opposite mode, and the frequency tuning screws (310) are arranged in the third through holes (120).
6. The metal filter according to claim 1, wherein a plurality of fourth through holes (130) and coupling tuning screws (320) are further arranged on the top plate of the metal cover body (100) in a one-to-one correspondence manner, and the coupling tuning screws (320) are arranged in the fourth through holes (130).
7. The metal filter according to claim 1, wherein a step structure matched with the base (200) is provided on an inner wall of a lower end of a side wall of the metal cover body (100), so that the metal cover body (100) is riveted with an edge of the base (200) in a circle.
8. The metal filter according to claim 1, wherein two signal transmission rods (330) are further disposed on the base (200), the two signal transmission rods (330) are respectively disposed on the outer sides of the resonators (220) that are the outermost in the length direction of the metal filter, and the upper ends of the signal transmission rods (330) are respectively bent toward the corresponding resonators (220) or the corresponding support columns (210) of the resonators (220).
9. The metal filter of claim 1, wherein an upper surface of the resonator (220) is flush with an upper surface of the first stepped post (2101) or an upper surface of the resonator (220) is higher than an upper surface of the first stepped post (2101);
the upper surface of the metal cover body (100) is flush with the upper surface of the isolation rib post (230), or the upper surface of the metal cover body (100) is higher than the upper surface of the isolation rib post (230).
10. A method of assembling a metal filter, comprising the steps of:
the base of the metal filter is manufactured by adopting a die casting or cold extrusion process, wherein a support column and an isolation rib column which are integrally formed with the base are arranged on the base, step columns with narrowing structures are arranged on the upper parts of the support column and the isolation rib column, and blind holes are formed in the upper surfaces of the step columns; manufacturing a resonator, and forming a first through hole on the resonator; manufacturing a metal cover body of the metal filter, and forming a second through hole matched with the isolation rib column on the metal cover body;
sleeving the first through hole of the resonator on the step post of the support post, and spinning the blind hole on the step post of the support post until the resonator is riveted on the step post of the support post;
the metal cover body is covered on the base, so that the second through holes are sleeved on the step columns of the isolation rib columns, and blind holes on the step columns of the isolation rib columns are spun until the metal cover body is riveted on the step columns of the isolation rib columns; and the metal cover body is fixedly connected with the base.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205069824U (en) * | 2015-09-30 | 2016-03-02 | 李登峰 | High performance dielectric filter |
| CN213845462U (en) * | 2020-11-27 | 2021-07-30 | 京信射频技术(广州)有限公司 | Metal cavity filter |
| CN214043952U (en) * | 2021-02-05 | 2021-08-24 | 广州宸伟网络科技有限公司 | Fixing structure of band elimination filter |
| CN216773483U (en) * | 2021-12-28 | 2022-06-17 | 武汉凡谷电子技术股份有限公司 | Resonator and cavity filter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6006079B2 (en) * | 2012-10-23 | 2016-10-12 | Ｎｅｃエンジニアリング株式会社 | Tunable bandpass filter |
| TWI622221B (en) * | 2017-03-23 | 2018-04-21 | 鴻海精密工業股份有限公司 | Cavity filter |
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2022
- 2022-06-27 CN CN202210735586.0A patent/CN115101908B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205069824U (en) * | 2015-09-30 | 2016-03-02 | 李登峰 | High performance dielectric filter |
| CN213845462U (en) * | 2020-11-27 | 2021-07-30 | 京信射频技术(广州)有限公司 | Metal cavity filter |
| CN214043952U (en) * | 2021-02-05 | 2021-08-24 | 广州宸伟网络科技有限公司 | Fixing structure of band elimination filter |
| CN216773483U (en) * | 2021-12-28 | 2022-06-17 | 武汉凡谷电子技术股份有限公司 | Resonator and cavity filter |
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