CN101916895A - Cavity filter and manufacturing method thereof - Google Patents
Cavity filter and manufacturing method thereof Download PDFInfo
- Publication number
- CN101916895A CN101916895A CN2010102594434A CN201010259443A CN101916895A CN 101916895 A CN101916895 A CN 101916895A CN 2010102594434 A CN2010102594434 A CN 2010102594434A CN 201010259443 A CN201010259443 A CN 201010259443A CN 101916895 A CN101916895 A CN 101916895A
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- Prior art keywords
- resonatron
- cover plate
- cavity
- cavity body
- body filter
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- 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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- 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
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
Abstract
The invention discloses a cavity filter and a manufacturing method thereof. The cavity filter provided by the embodiment of the invention comprises a cavity and a cover plate, wherein, a resonance tube is integrated with the cover plate so as to facilitate seamless connection between the resonance tube and the cover plate. Relative to the existing processing and assembling modes of the resonance tube, the manufacturing method of the invention can greatly lower material cost and processing cost, omit the procedure of assembling the resonance tube on the bottom surface of the cavity, achieve simple and convenient assembly, and lower cost of the filter.
Description
Technical field
The present invention relates to the wave filter technology field, be specifically related to cavity body filter and cavity body filter manufacture method.
Background technology
Cavity body filter is widely used in the communications field as a kind of frequency selection device, especially field of radio frequency communication.In the base station, filter is used to select signal of communication, clutter or interference signal that the filtering communication signal frequency is outer.
Cavity body filter generally comprises three classes, and the first kind is a coaxial cavity filter, and second class is a dielectric filter, and the 3rd class is a waveguide filter.For coaxial cavity filter, generally comprise: cavity, cover plate and be housed in metal resonatron in the cavity.
A kind of generalized section of cavity body filter is utilized the mode of turning processing to make resonatron 101 usually, and then with screw 103 resonatron 101 is fixed on the cavity bottom surface 102 as shown in Figure 1 in the prior art, refills at last and joins cover plate 104.
In research and practice process to prior art, the present inventor finds, in the prior art, because cover plate and resonatron are independent processing, and the later stage assembling, the possible loose contact of resonatron and cavity, and because the restriction of resonatron processing mode, cost compares higher.
Summary of the invention
Cavity body filter that the embodiment of the invention provides and cavity body filter manufacture method can reduce the production cost of filter.
The cavity body filter that the embodiment of the invention provides comprises cavity and cover plate, and described cover plate is provided with resonatron, and described resonatron and described cover plate are one-body molded.
The cavity body filter manufacture method that the embodiment of the invention provides comprises: provide a sheet material as cavity filter cover board; The position that needs to be provided with resonatron on described cover plate is carried out punching press to cover plate and is formed resonatron with described cover plate one; Described cover plate and the cavity that has resonatron assembled.
In the embodiment of the invention, resonatron and cover plate are one-body molded, make resonatron and cover plate seamless link, avoided the problem of resonatron and filter cavity loose contact, and resonatron and cover plate adopt same sheet material to make, with respect to the processing and the fit of existing resonatron, material cost and processing cost have been reduced significantly, saved resonatron has been assemblied in operation on the cavity bottom surface, assembled easyly, reduced the cost of filter.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the generalized section of a kind of cavity body filter in the prior art;
Fig. 2 (a) is the partial structurtes schematic diagram of cavity filter cover board in the embodiment of the invention one;
Fig. 2 (b) is the partial cutaway schematic of cavity body filter in the embodiment of the invention one;
Fig. 3 (a) is the partial structurtes schematic diagram of cavity filter cover board in the embodiment of the invention two;
Fig. 3 (b) is the partial cutaway schematic of cavity body filter in the embodiment of the invention two;
Fig. 3 (c) is the partial structurtes schematic diagram of a kind of cavity filter cover board in the embodiment of the invention two;
Fig. 3 (d) is the partial structurtes schematic diagram of another kind of cavity filter cover board in the embodiment of the invention two;
Fig. 4 is the flow chart of cavity body filter manufacture method in the embodiment of the invention three;
Fig. 5 is the flow chart of cavity body filter manufacture method in the embodiment of the invention four.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Embodiment one, a kind of cavity body filter, comprise cavity and cover plate, the structure of cover plate schematic diagram is shown in Fig. 2 (a), and the generalized section of cavity body filter is shown in Fig. 2 (b), cover plate 201 is provided with resonatron 202, and described resonatron 202 and described cover plate 201 are one-body molded.
The integrated implementation of resonatron and cover plate can have multiple, and for example, resonatron can form with the cover plate integral die-cast, and resonatron also can carry out punching press to cover plate and form.
The thickness of cavity filter cover board can be set to 0.5～4.0cm, for the cover plate that adopts the integral die-cast mode to form resonatron and cover plate, its thickness can be chosen for 2.0～4.0cm, and for example 2.0cm, 3.0cm, 4.0cm are so that satisfy the requirement of die casting to cover sheet thickness; For adopting the mode that thereby the cover plate punching press is formed resonatron, the thickness of cover plate can be chosen for 0.5～2.0cm, for example 0.5cm, 1.5cm, 2.0cm, choose the thickness of sheet material moderate, for example, choose the sheet material of different-thickness according to the difference of the processing mode of resonatron and make cover plate, can avoid because of the too thick cost that causes of sheet material higher, and problems such as can avoiding yielding, cooperate with cavity closely, evenness is not high, and resonatron is yielding, tear because of the too thin cover plate that causes of sheet material.The thickness and the choosing of material that are appreciated that concrete sheet material are not construed as limiting the invention.
In the embodiment of the invention, resonatron and cover plate are one-body molded, make resonatron and cover plate seamless link, processing and fit with respect to existing resonatron, material cost and processing cost have been reduced significantly, saved resonatron has been assemblied in operation on the cavity bottom surface, assembled easyly, reduced the cost of filter.
Embodiment two, a kind of cavity body filter, comprise cavity and cover plate, the structural representation of cavity filter cover board is with reference to figure 3 (a), and the generalized section of cavity body filter is with reference to figure 3 (b), described cover plate 301 is provided with resonatron 302, and described resonatron and described cover plate are one-body molded.
In the embodiment of the invention, can be provided with a plurality of projections 303 on the cover plate 301, described a plurality of projection can have multiple distribution mode, for example, can be that the center radially distributes on cover plate with described resonatron 302, its partial structurtes schematic diagram such as Fig. 3 (c) also can be circular-arc and be distributed in around the described resonatron, its partial structurtes schematic diagram such as Fig. 3 (d).The cross section of described projection can be circular arc, trapezoidal, rectangle or semicircle, and concrete shape and structure are not construed as limiting the invention.The implementation of described projection can have multiple, and for example, the mode that adopts punching press is from the surface direction punching press that makes progress of cover plate lower surface, thereby on the cover board forms projection.
By projection on the cover board is set, can strengthen the intensity of cover plate, play the effect of reinforcement, make the anti-deformation of cover plate improve, avoid the influence of cover plate distortion to the cavity body filter index.
In the embodiment of the invention, cavity body filter also comprises tuning screw 310, cavity bottom surface 304 is provided with along the screwed hole of resonatron 302 axis directions, described tuning screw 310 runs through described screwed hole assembling, regulates the radio frequency parameter of cavity body filter by the relative position of regulating tuning screw 310 and resonatron 302.
By tuning screw is set, can be by regulating the relative position of tuning screw 310 and resonatron 302, for example, by precession or back-out tuning screw 310, make distance between tuning screw and the resonatron bottom surface diminish or become big, thereby make the resonance frequency of cavity body filter that certain variation take place.
Tuning screw comprises tuning dish 311 and screw rod 312, described tuning dish 311 is positioned at inside cavity, described screw rod 312 is positioned at the cavity outside away from the end 313 of tuning dish 311, screw rod end 313 is provided with " one " word groove shaped closing in structure, " one " word groove shaped closing in structure also can be set on the tuning dish 311, so that cooperate the straight screwdriver application of force, thereby assemble tuning screw easily, can or screw out tuning screw by precession simultaneously, reach the purpose of regulating distance between tuning dish and the resonatron bottom surface.Certainly, the closing in structure is not limited to this, and those skilled in the art expect other closing in structures commonly used in the prior art easily, for example
" ten " word groove, interior six flower grooves, interior hexagonal groove or other protruding polygons or depression polygon etc.Certainly, can adopt two ends tuning screw rod of the same size yet, perhaps adopt the adjusting screw(rod) of cup head, the shape of concrete tuning screw is not construed as limiting the invention.Have the tuning screw of tuning dish by employing, make that the distance between tuning dish and the resonatron bottom surface changes, so that regulate the resonance frequency of filter.
In the present embodiment, cavity body filter can also include nut 314 and the pad 315 that matches with tuning screw 310, thereby makes tuning screw and cavity reliably lock.
In the embodiment of the invention two, the resonatron and the cover plate of cavity body filter are one-body molded, make resonatron and cover plate seamless link, avoided the problem of resonatron and filter cavity loose contact, and resonatron and cover plate adopt same sheet material to make, with respect to the processing and the fit of existing cover plate and resonatron, reduced processing cost significantly, saved resonatron be assemblied in operation on the cavity bottom surface, assemble easy, thereby reduced the cost of filter.
Embodiment three, a kind of cavity body filter manufacture method comprise:
A1 provides a sheet material as cavity filter cover board.
Sheet material as cavity filter cover board can have multiple, for example, the thickness of described sheet material can be 0.5～2.0cm, and the material of sheet material can be in copper or steel or the alloy aluminum one or more, and choosing of the thickness of concrete sheet material and material is not construed as limiting the invention.
A2, the position that needs to be provided with resonatron on described cover plate is carried out punching press to cover plate and is formed resonatron with described cover plate one.
In the embodiment of the invention, the position that needs to be provided with resonatron on the described cover plate can have one or more, and when the position that needs to be provided with resonatron on the cover plate has when a plurality of, described cover plate is carried out punching press can be that described a plurality of positions are carried out punching press simultaneously.A plurality of positions are carried out punching press simultaneously, help enhancing productivity, and then reduce cost, and help making cover plate stressed evenly, and then help improving the evenness of cover plate.Certainly, can carry out punching press one by one to each position, concrete choosing of punching press order is not construed as limiting the invention yet.
A3 assembles described cover plate and the cavity that has resonatron.
The method that cover plate and cavity are assembled can have multiple, for example, with the mode of screw lock cover plate is fixed on the cavity, perhaps the mode with welding welds together cover plate and cavity, the fit that is appreciated that concrete cover plate and resonatron is not construed as limiting the invention.
In the embodiment of the invention three, resonatron and cover plate are one-body molded, make resonatron and cover plate seamless link, avoided the problem of resonatron and filter cavity loose contact, and resonatron and cover plate adopt same sheet material to make, with respect to the processing and the fit of existing resonatron, material cost and processing cost have been reduced significantly, saved resonatron has been assemblied in operation on the cavity bottom surface, assembled easyly, reduced the cost of filter.
Embodiment four, a kind of cavity body filter manufacture method comprise:
B1 provides a sheet material as cavity filter cover board.
The sheet material that is used as cavity filter cover board can have multiple, and for example, the material of described sheet material can be in copper or steel or the alloy aluminum one or more.For example, the material of described sheet material can be SPCE (Steel Plate Cold Elongation), i.e. deep-draw cold-rolled steel sheet, and this material is suitable for deep-draw stretching purposes, and its deep drawability is better.Sheet metal thickness can be set to 0.5～2.0cm, sheet metal thickness is moderate, for example, sheet metal thickness is 0.5cm, 1.0cm, 1.5cm, 2.0cm, can avoid because of the too thick cost that causes of sheet material higher, and problems such as can avoiding yielding, cooperate with cavity closely, evenness is not high, and resonatron is yielding, tear because of the too thin cover plate that causes of sheet material.The thickness and the choosing of material that are appreciated that concrete sheet material are not construed as limiting the invention.
B2, the position that needs to be provided with resonatron on described cover plate is carried out repeatedly pull and stretch to cover plate and is formed resonatron, and wherein, the degree of depth of each pull and stretch is and increases progressively trend finally to the resonatron height of satisfying the demand.
In the present embodiment, the shape of resonatron can have multiple, as cylindrical, conical, rectangle etc., according to the concrete shape of required resonatron, can the degree of depth of each pull and stretch be provided with, and makes repeatedly the resonatron of the drawing and forming height of satisfying the demand.
The position that needs to be provided with resonatron on the described sheet material can have one or more, and when the position that needs to be provided with resonatron on the sheet material has when a plurality of, described sheet material is carried out repeatedly pull and stretch is described a plurality of positions to be carried out pull and stretch simultaneously at every turn.A plurality of positions are carried out pull and stretch simultaneously, help enhancing productivity, and then reduce cost, and help making cover plate stressed evenly, and then help improving the evenness of cover plate.Certainly, can carry out pull and stretch one by one to each position, concrete choosing of pull and stretch order is not construed as limiting the invention yet.
B3, resonatron is carried out shaping.
In the present embodiment, carry out shaping and be in order to make resonatron reach size tolerance requirements, Geometrical Tolerance Principle, surface roughness requirement of regulation etc.
B4, to the resonatron electroplating processes.
In the present embodiment, the purpose of electroplating is to make the resonatron surface have better electric conductivity, improve the resonatron surface roughness, optimize the index parameter of filter, concrete plating mode has multiple, for example, can silver-plated or copper facing to the outer wall of resonatron, can certainly adopt one or more inwall and the outer walls in silver or copper or other plated materials to electroplate to resonatron, different based on index with parameter request to product, can take different plating modes and plated material, thickness of plating layer also can be provided with as required, all is not construed as limiting the invention.
B5 assembles described cover plate and the cavity that has resonatron.
The method that cover plate and cavity are assembled can have multiple, for example, with the mode of screw lock cover plate is fixed on the cavity, perhaps the mode with welding welds together cover plate and cavity, the fit that is appreciated that concrete cover plate and resonatron is not construed as limiting the invention.
In the embodiment of the invention four, adopt repeatedly the mode of pull and stretch that sheet material is carried out punching press, the degree of depth of each pull and stretch is and increases progressively trend finally to the resonatron height of satisfying the demand.Increase progressively trend because the degree of depth of each pull and stretch is, make resonatron tube wall progressively ironing be shaped, characteristics such as that the resonatron of shaping has is thin, even, intensity height, thereby can effectively reduce the phenomenon of tearing, pulling open, the production stability height, production cost is low.And the resonatron and the cover plate that process are one-body molded, make resonatron and cover plate seamless link, are convenient to guarantee index, assemble easy, the production efficiency height, production cost is low.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: read-only memory (Read-Only Memory, ROM), random access device (Random Access Memory, RAM), various media that can be program code stored such as magnetic disc or CD.
More than cavity body filter and cavity body filter manufacture method that the embodiment of the invention provided are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (12)
1. a cavity body filter comprises cavity and cover plate, it is characterized in that, described cover plate is provided with resonatron, and described resonatron and described cover plate are one-body molded.
2. cavity body filter as claimed in claim 1 is characterized in that, described resonatron forms with the cover plate integral die-cast or the cover plate punching press is formed.
3. cavity body filter as claimed in claim 1 is characterized in that described cover plate is provided with a plurality of projections, is used to improve the intensity of cover plate.
4. as any described cavity body filter of claim 1 to 3, it is characterized in that, described cavity body filter also comprises tuning screw, described cavity bottom surface is provided with along the screwed hole of described resonatron axis direction, described tuning screw runs through described screwed hole assembling, regulates the radio frequency parameter of described cavity body filter by the relative position of regulating described tuning screw and described resonatron.
5. cavity body filter as claimed in claim 4, it is characterized in that, described tuning screw comprises tuning dish and screw rod, described tuning dish is positioned at inside cavity, described screw rod is provided with the closing in structure that cooperation screws the instrument application of force away from the end of tuning dish, and described closing in structure is " one " word groove, " ten " word groove, protruding polygon or depression polygon.
6. a cavity body filter manufacture method is characterized in that, comprising:
Provide a sheet material as cavity filter cover board;
The position that needs to be provided with resonatron on described cover plate is carried out punching press to cover plate and is formed resonatron with described cover plate one;
Described cover plate and the cavity that has resonatron assembled.
7. cavity body filter manufacture method as claimed in claim 6 is characterized in that, the described position that needs resonatron is set on described cover plate comprises the resonatron that cover plate carries out punching press formation and described cover plate one:
Cover plate is carried out repeatedly pull and stretch form resonatron, wherein, the degree of depth of each pull and stretch is and increases progressively trend finally to the resonatron height of satisfying the demand.
8. cavity body filter manufacture method as claimed in claim 7 is characterized in that, describedly cover plate is carried out repeatedly pull and stretch also comprises after forming resonatron:
Resonatron is carried out shaping.
9. cavity body filter manufacture method as claimed in claim 8 is characterized in that, described resonatron is carried out also comprising after the shaping:
To the resonatron electroplating processes.
10. as any described cavity body filter manufacture method of claim 6 to 9, it is characterized in that the position that needs to be provided with resonatron on the described cover plate has a plurality of, described cover plate is carried out punching press is that described a plurality of positions are carried out punching press simultaneously.
11., it is characterized in that described sheet metal thickness is 0.5cm～2.0cm as any described cavity body filter manufacture method of claim 6 to 9.
12. cavity body filter manufacture method as claimed in claim 11 is characterized in that, the material of described sheet material is copper material or steel or alloy aluminium.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102594434A CN101916895A (en) | 2010-08-20 | 2010-08-20 | Cavity filter and manufacturing method thereof |
| PCT/CN2011/076684 WO2012022201A1 (en) | 2010-08-20 | 2011-06-30 | Cavity filter and method for manufacturing cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102594434A CN101916895A (en) | 2010-08-20 | 2010-08-20 | Cavity filter and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101916895A true CN101916895A (en) | 2010-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2010102594434A Pending CN101916895A (en) | 2010-08-20 | 2010-08-20 | Cavity filter and manufacturing method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101916895A (en) |
| WO (1) | WO2012022201A1 (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361115A (en) * | 2011-09-30 | 2012-02-22 | 深圳市大富科技股份有限公司 | Cavity filter and production method thereof |
| WO2012022201A1 (en) * | 2010-08-20 | 2012-02-23 | 深圳市大富科技股份有限公司 | Cavity filter and method for manufacturing cavity filter |
| WO2012100602A1 (en) * | 2011-01-27 | 2012-08-02 | 中兴通讯股份有限公司 | Filter |
| CN103004013A (en) * | 2012-06-21 | 2013-03-27 | 华为技术有限公司 | Cavity filter and manufacturing method thereof |
| WO2014075457A1 (en) * | 2012-11-16 | 2014-05-22 | 深圳市大富科技股份有限公司 | Cavity filter and radio frequency communications device having same |
| CN104126247A (en) * | 2012-02-27 | 2014-10-29 | 株式会社Kmw | Radio frequency filter having cavity structure |
| WO2015074616A1 (en) * | 2013-11-25 | 2015-05-28 | 华为技术有限公司 | Filter |
| CN105322270A (en) * | 2015-11-17 | 2016-02-10 | 强胜精密机械(苏州)有限公司 | Manufacturing method of cover board of cavity filter |
| CN105337007A (en) * | 2015-11-17 | 2016-02-17 | 强胜精密机械(苏州)有限公司 | Manufacturing method of cavity filter cover plate |
| CN105356027A (en) * | 2015-11-17 | 2016-02-24 | 强胜精密机械(苏州)有限公司 | Manufacturing method for cavity filter cover plate |
| CN106159395A (en) * | 2015-04-16 | 2016-11-23 | 深圳市大富科技股份有限公司 | Cavity body filter, duplexer and radio frequency remote equipment |
| CN109509946A (en) * | 2018-12-05 | 2019-03-22 | 广东通宇通讯股份有限公司 | A kind of mounting screw linking cavity body filter |
| CN110767969A (en) * | 2018-07-27 | 2020-02-07 | 中兴通讯股份有限公司 | Cavity filter |
| CN113070458A (en) * | 2020-01-06 | 2021-07-06 | 深圳市大富科技股份有限公司 | Preparation method of die for die casting, die, preparation method of cover plate and filter |
| WO2023130219A1 (en) * | 2022-01-04 | 2023-07-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Filter cover, resonator, rf cavity filter and communication device |
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| WO2012022201A1 (en) * | 2010-08-20 | 2012-02-23 | 深圳市大富科技股份有限公司 | Cavity filter and method for manufacturing cavity filter |
| WO2012100602A1 (en) * | 2011-01-27 | 2012-08-02 | 中兴通讯股份有限公司 | Filter |
| CN102361115B (en) * | 2011-09-30 | 2014-07-30 | 深圳市大富科技股份有限公司 | Production method of cavity filter |
| CN102361115A (en) * | 2011-09-30 | 2012-02-22 | 深圳市大富科技股份有限公司 | Cavity filter and production method thereof |
| CN104126247B (en) * | 2012-02-27 | 2016-04-13 | 株式会社Kmw | There is the radio-frequency filter of cavity configuration |
| CN104126247A (en) * | 2012-02-27 | 2014-10-29 | 株式会社Kmw | Radio frequency filter having cavity structure |
| JP2015510353A (en) * | 2012-02-27 | 2015-04-02 | ケーエムダブリュ・インコーポレーテッド | Radio frequency filter with cavity structure |
| US10090572B1 (en) | 2012-02-27 | 2018-10-02 | Kmw Inc. | Radio frequency filter having a hollow box with a resonance element disposed therein and a depression with dot peen structures therein |
| US9716301B2 (en) | 2012-02-27 | 2017-07-25 | Kmw Inc. | Radio frequency filter having a hollow box with a wrinkle structure and including a resonance element disposed therein which is short-circuited to the box by a pin |
| JP2016059078A (en) * | 2012-02-27 | 2016-04-21 | ケーエムダブリュ・インコーポレーテッド | Radio frequency filter having cavity structure |
| CN105720338A (en) * | 2012-02-27 | 2016-06-29 | 株式会社Kmw | Radio Frequency Filter Having Cavity Structure |
| CN103004013A (en) * | 2012-06-21 | 2013-03-27 | 华为技术有限公司 | Cavity filter and manufacturing method thereof |
| WO2014075457A1 (en) * | 2012-11-16 | 2014-05-22 | 深圳市大富科技股份有限公司 | Cavity filter and radio frequency communications device having same |
| US9954264B2 (en) | 2012-11-16 | 2018-04-24 | Shenzhen Tatfook Technology Co., Ltd. | Cavity filter and RF communication device with the cavity filter |
| WO2015074616A1 (en) * | 2013-11-25 | 2015-05-28 | 华为技术有限公司 | Filter |
| CN106159395A (en) * | 2015-04-16 | 2016-11-23 | 深圳市大富科技股份有限公司 | Cavity body filter, duplexer and radio frequency remote equipment |
| CN105356027A (en) * | 2015-11-17 | 2016-02-24 | 强胜精密机械(苏州)有限公司 | Manufacturing method for cavity filter cover plate |
| CN105337007A (en) * | 2015-11-17 | 2016-02-17 | 强胜精密机械(苏州)有限公司 | Manufacturing method of cavity filter cover plate |
| CN105337007B (en) * | 2015-11-17 | 2018-05-22 | 强胜精密机械(苏州)有限公司 | A kind of manufacturing method of cavity filter cover board |
| CN105322270B (en) * | 2015-11-17 | 2018-05-22 | 强胜精密机械(苏州)有限公司 | A kind of manufacturing method of cavity filter cover board |
| CN105322270A (en) * | 2015-11-17 | 2016-02-10 | 强胜精密机械(苏州)有限公司 | Manufacturing method of cover board of cavity filter |
| CN105356027B (en) * | 2015-11-17 | 2018-10-12 | 强胜精密机械(苏州)有限公司 | A kind of manufacturing method of cavity filter cover board |
| CN110767969A (en) * | 2018-07-27 | 2020-02-07 | 中兴通讯股份有限公司 | Cavity filter |
| CN109509946A (en) * | 2018-12-05 | 2019-03-22 | 广东通宇通讯股份有限公司 | A kind of mounting screw linking cavity body filter |
| CN109509946B (en) * | 2018-12-05 | 2024-01-05 | 广东通宇通讯股份有限公司 | Mounting screw connection type cavity filter |
| CN113070458A (en) * | 2020-01-06 | 2021-07-06 | 深圳市大富科技股份有限公司 | Preparation method of die for die casting, die, preparation method of cover plate and filter |
| WO2023130219A1 (en) * | 2022-01-04 | 2023-07-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Filter cover, resonator, rf cavity filter and communication device |
Also Published As
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|---|---|
| WO2012022201A1 (en) | 2012-02-23 |
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Address after: 518104, Guangdong, Shenzhen province Baoan District manhole Street oyster road manhole Industrial Company Third Industrial Zone A1, A2, A3 101 and 2 layers, A4 Applicant after: Shenzhen Tat Fook Technology Co., Ltd. Address before: 518108 Bao'an District, Shenzhen City, Guangdong Province, Shiyan Town, love group with the rich industrial area A \ B Dong Applicant before: Shenzhen Tat Fook Technology Co., Ltd. |
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