CN205376700U - Cavity filter - Google Patents
Cavity filter Download PDFInfo
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- CN205376700U CN205376700U CN201520918584.0U CN201520918584U CN205376700U CN 205376700 U CN205376700 U CN 205376700U CN 201520918584 U CN201520918584 U CN 201520918584U CN 205376700 U CN205376700 U CN 205376700U
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Abstract
The utility model provides a cavity filter, includes cavity, apron and harmonious auto -lock screw, lap the cavity that is used for closing cap cavity filter, body adoption copper -aluminium alloy is lapped including the apron body to the apron, be equipped with harmonious screw hole on the apron body, harmonious screw hole that specifically be extending to the cavity direction with boss that lap body integrated into one piece, harmonious auto -lock screw divide into head and pole portion, the auto -lock screw adopts the copper to form, screw one end is the head, the other end is pole portion, the head of screw is equipped with the screw thread and forms the screw, this screw thread is equipped with two sets, two upper and lower external threadings and pitch P are the same, the diameter of going up the screw thread is greater than the diameter of screw thread down, partial diameter between two screw threads is 40% - 70% of pole portion diameter, the utility model discloses a cost and tuning performance ability are compromise to the wave filter.
Description
Technical field
This utility model relates to signal processing field, particularly relates to a kind of cavity body filter.
Background technology
At present, the signal processing of cavity body filter is generally completed by the tuning Self-locking screw on filter cover board, the problem that problem is signal intermodulation that tuning screw processes in general, specifically refers to two different frequency signals, superposition in a certain system and the signal of new frequency that produces.
Currently common wave filter includes cavity, the parts such as cover plate and tuning Self-locking screw, filter cover board mostly adopts the mode at sheet material upper punch pressing hole-forming tubular drill to process tuned window now, it is high that the mode of one side punching press processes screwed hole defect rate, too high manufacturing cost, the tuned window stamped out on the other hand also needs additionally mounted upper tuning swivel nut, tuning swivel nut adopts welding, press, the mode such as gluing is fixed on tuned window, the installation of tuning swivel nut not only needs cost of labor and processing cost, simultaneously, this tuning swivel nut additionally installed additional on tuned window is also unstable, loosen through being easy for generation after a period of time, and the also also out-of-flatness of the interface of tuned window and tuning swivel nut, the tuning effect that final impact is actual.
Utility model content
This utility model aims to provide a kind of cavity body filter.
nullFor solving above-mentioned technical problem，This utility model is by the following technical solutions，A kind of cavity body filter，Including cavity、Cover plate and tuning Self-locking screw，Described cover plate is for covering the cavity of cavity body filter，Cover plate includes cover board body，Cover board body adopts albronze，This alloy is Copper-Aluminum compound integration alloy，Namely one side is copper，One side is aluminum，During use, aluminum is in the face of quasi-cavity，Described cover board body is provided with tuning screwed hole，Tuning screwed hole is specially the boss integrated with cover board body extended to cavity direction，The mid portion hollow of boss，The inner ring of boss is copper、Outer ring is aluminum，It is provided with screwed hole along its axis direction inside boss，It is additionally provided with the tuned window connected with screwed hole along its axis direction inside described boss，This tuned window is relative to the screwed hole cavity closer to wave filter，The diameter of tuned window is less than the diameter of filter tuner Self-locking screw；Tuning Self-locking screw is divided into head and bar portion, Self-locking screw adopts copper to be made, screw one end is head, the other end is bar portion, bar portion stretches into tuned radio frequency parameter in the cavity of wave filter, Self-locking screw is fixed on the cover plate of wave filter by head, apical head is provided with for receiving screwdriver the driving according to this screwdriver to make tuning screw screw in the receiving channel within cavity body filter, the head of screw is provided with screw thread and forms screw, this screw thread is provided with two sections, diameter >=the M4 of the screw that screw thread is formed, between two sections of screw threads and be not attached to, the pitch P of two sections screw thread is all identical, the diameter of upper screw thread is more than the diameter of lower screw thread, the diameter of upper screw thread and lower screw thread is than for 1.01:1 1.1:1, section diameter between two screw threads is 40% the 70% of bar portion diameter.
As preferably, the thickness of described cover board body is 1-3mm.
As preferably, the height of described boss is 1-20mm.
As preferably, the swivel nut that described boss internal thread holes is formed is suitable for the tuning Self-locking screw of M4-M10 specification.
As preferably, comprising the copper of 10-20% in the albronze that described cover board body adopts, residual components is aluminum.
As preferably, the albronze that described cover board body adopts comprising the copper of 10% and the aluminum of 90%.
As preferably, described cover board body being additionally provided with cover screw hole, cover plate is by being fixed on cavity through the screw in cover screw hole.
As preferably, fineness≤0.8 of the copper that Self-locking screw adopts, the copper material making Self-locking screw is H65.
As preferably, spacing between said two screw thread is 0.1-2mm, upper screw thread and lower screw thread can produce a displacement in the axial direction, this displacement S is set as that upper screw thread originally downwardly extended the deviation that location produces with screw position under reality, and described displacement S is sized to 0.1P 0.8P.
As preferably, receiving channel is interior hexagonal shape, and screw head is evenly distributed with six grooves around the part of receiving channel and extends to inside receiving channel.
nullRelative to traditional cavity body filter，This utility model all adopts albronze to be used as the material of cover board body，Filter cover board common on market mostly adopts the sheet material of surface electrical copper facing or fine copper，Regardless of whether be fine copper or the cost of electro-coppering all of a relatively high，Use the aluminium that albronze is because accounting most on the one hand relatively cheap，Use aluminum to manufacture cover plate and can greatly save material cost，The quality of aluminum and copper is softer on the other hand，Processing is got up easily，Also save processing cost，Simultaneously for the consideration utilizing electric conductivity that copper is good，Albronze can also play the conductive effect the same with fine copper sheet material cost-effective while，Because cover plate of the present utility model is also provided with the boss with the integrated mid portion hollow of cover board body that namely tuning screwed hole extends to cavity direction，The inner ring of boss is copper、Outer ring is aluminum，The internal part contacted with adjusting screw of boss is copper，Without influence on actual conductive effect；And this utility model uses boss to replace the combination of traditional tuned window and tuning swivel nut, it is because processing boss only need to cover board body be stretched, use lathe just can be automatically performed the processing of tuning screwed hole, need not still further pass through to stamp out tuned window and fix tuning swivel nut two to overlap operation, this tuning screwed hole is by the materials processing of cover board body out, this utility model also will not waste material while saving operation, and integrated boss is very firm, without influence on the effect of tuning；Consider the actual demand that present filter tunes, the specification of tuning Self-locking screw is M4-M10 at present, and accordingly, the albronze extensibility adopted due to cover plate is better, the thickness of cover plate only need to control at 1-3mm, and cover plate is light and does not affect result of use, saves material cost further, the height of boss can also control at 1-20mm, it is sufficient to meets the instructions for use of Self-locking screw；nullIt is additionally provided with the tuned window connected with screwed hole along its axis direction inside this utility model boss，This tuned window is relative to the screwed hole cavity closer to wave filter，The diameter of tuned window is less than the diameter of filter tuner Self-locking screw，Electric capacity is formed between inwall and the tuning screw of boss inner ring，Make cover plate is introduced the effect of capacity plate antenna，Reduce the electric current density of tuning screw and cover plate binding site，Reduce the inter-modulated signal level because tuning screw produces with cover plate loose contact，Improve the intermodulation first-pass yield of cavity body filter，The front end of screw departs from downwards when screwed hole enters tuning porose area can squeeze tuned window，And tuned window diameter is less than screwed hole，The material considering tuned window is copper，The elastic force that copper is good can promote tuned window inwardly to extrude to pin Self-locking screw better，Filter cover board is also without an additionally mounted elastic sheet metal，Save material and artificial；nullThis utility model have also been devised a kind of new tuning Self-locking screw，The head of screw is provided with screw thread and forms screw，This screw thread is provided with two sections，Tuning range according to cavity body filter and actually used demand，Diameter >=the M4 of the screw that this utility model screw thread is formed，The Altitude control of corresponding screw is at 1-20mm，Two sections of screw threads of the present utility model are also not attached to，Owing to this utility model adopts copper to make screw，Copper itself has good electric conductivity and ductility，Two thread pitch P of this utility model design are identical again，The diameter of upper screw thread is more than the diameter of lower screw thread，The diameter of upper screw thread and lower screw thread is than for 1.01:1 1.1:1，Owing to the diameter of upper and lower screw thread is different，Screwdriver orders about the power that in screw screw-in cavity body filter process, screw head is subject to and is just no longer uniformly distributed，Owing to two screw threads form a slight dislocation，Such screwdriver drives screw to screw in screw head in the process within cavity body filter can produce slight deformation，Because the power that screw head is subject to not is equally distributed，Have certain deviation，And the screw threads of two dislocation can produce to recover the restoring force of original shape after being subject to the extruding force of screwdriver centered by part between two screw threads and prop up the cavity of wave filter，Thus completing the self-locking of screw，Upper screw thread and lower screw thread can produce a displacement in the axial direction，This displacement S is set as that upper screw thread originally downwardly extended the deviation that location produces with screw position under reality，Described displacement S is sized to 0.1P 0.8P，Existence due to this side-play amount，The uneven of screwdriver urging force can be strengthened，Simultaneously，Consider the self-locking effect of reality，Section diameter between screw thread is 40% the 70% of bar portion diameter，Because this section diameter has the danger of fracture time narrow，The restoring force of two screw threads has counteracting to a certain extent simultaneously，And this section diameter wide time the extruding force that produces of two screw threads inadequate，Self-locking DeGrain，Additionally，It is H65 that this utility model is used for manufacturing the copper material of screw，Neither too hard, nor too soft，Its copper content can also meet the demand of tuning，Copper material fineness≤0.8，Ensure the coefficient of friction on screw surface and filter cover board，Guarantee self-locking effect，Simultaneously again without influence on the effect of tuning，Consider height and the diameter of screw，Spacing between two screw threads controls at 0.1 2mm，And the receiving channel of screw head is interior hexagonal shape，Screw head is evenly distributed with six grooves around the part of receiving channel and extends to inside receiving channel，The top deformation of the more convenient screw of this shape is to obtain better self-locking effect.
Accompanying drawing explanation
Fig. 1 is this utility model is the schematic diagram of embodiment；
Fig. 2 is the schematic diagram of this utility model cover plate；
Fig. 3 is the schematic diagram of this utility model tuning screwed hole；
Fig. 4 is the structural representation of this utility model tuning Self-locking screw;
Fig. 5 is the partial enlarged drawing of this utility model tuning Self-locking screw；
Fig. 6 is the sectional view of this utility model tuning Self-locking screw.
In figure: 1, cover board body；2, boss；3, screwed hole；4, tuned window；5, cover screw hole；6, head；7, bar portion；8, receiving channel；9, screw thread；91, upper screw thread；92, lower screw thread；10, cavity；11, Self-locking screw.
Detailed description of the invention
Being described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish.The embodiment described below with reference to accompanying drawing is illustrative of, and is only used for explaining this utility model, and it is not intended that to restriction of the present utility model.
In description of the present utility model, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, for example, it may be mechanically connected or electrical connection, it is also possible to be the connection of two element internals, can be joined directly together, it is also possible to be indirectly connected to by intermediary.For the ordinary skill in the art, it is possible to understand the concrete meaning of above-mentioned term as the case may be.
nullReferring to Fig. 1 to Fig. 6, a kind of cavity body filter according to this utility model embodiment is described，Including cavity 10、Cover plate and tuning Self-locking screw 11，Described cover plate is for covering the cavity 10 of cavity body filter，Cover plate includes cover board body 1，Cover board body 1 adopts albronze，This alloy is Copper-Aluminum compound integration alloy，Namely one side is copper，One side is aluminum，During use, aluminum is in the face of quasi-cavity 10，Described cover board body 1 is provided with tuning screwed hole，Tuning screwed hole is specially the boss 2 integrated with cover board body extended to cavity direction，The mid portion hollow of boss 2，The inner ring of boss 2 is copper、Outer ring is aluminum，Boss 2 is internal is provided with screwed hole 3 along its axis direction，Described boss 2 is internal is additionally provided with, along its axis direction, the tuned window 4 connected with screwed hole 3，This tuned window 4 is relative to the screwed hole 3 cavity 10 closer to wave filter，The diameter of tuned window 4 is less than the diameter of filter tuner Self-locking screw 11；nullTuning Self-locking screw 11 is divided into head 6 and bar portion 7，Self-locking screw 11 adopts copper to be made，Screw 11 one end is head 6，The other end is bar portion 7，Bar portion 7 stretches into tuned radio frequency parameter in the cavity 10 of wave filter，Self-locking screw 11 is fixed on the cover plate of wave filter by head 6，Head 6 top is provided with for receiving screwdriver the driving according to this screwdriver to make tuning screw 11 screw in the receiving channel 8 within cavity body filter，The head 6 of screw is provided with screw thread 9 and forms screw，This screw thread 9 is provided with two sections，Diameter >=the M4 of the screw that screw thread 9 is formed，Between two sections of screw threads 9 and be not attached to，The pitch P of two sections screw thread is all identical，The diameter of upper screw thread 91 is more than the diameter of lower screw thread 92，The diameter of upper screw thread 91 and lower screw thread 92 is than for 1.01:1 1.1:1，Section diameter between two screw threads 9 is 40% the 70% of bar portion diameter.
As preferably, the thickness of described cover board body 1 is 1-3mm.
As preferably, the height of described boss 2 is 1-20mm.
As preferably, the swivel nut that described boss 2 internal thread holes 3 is formed is suitable for the tuning Self-locking screw of M4-M10 specification.
As preferably, comprising the copper of 10-20% in the albronze that described cover board body 1 adopts, residual components is aluminum.
As preferably, the albronze that described cover board body 1 adopts comprising the copper of 10% and the aluminum of 90%.
As preferably, described cover board body 1 being additionally provided with cover screw hole 5, cover plate is by being fixed on cavity through the screw in cover screw hole.
As preferably, fineness≤0.8 of the copper that Self-locking screw 11 adopts, the copper material making Self-locking screw 11 is H65.
As preferably, spacing between said two screw thread 9 is 0.1-2mm, upper screw thread 91 can produce a displacement in the axial direction with lower screw thread 92, this displacement S is set as that upper screw thread 91 originally downwardly extended the deviation that location produces with screw thread 92 position under reality, and described displacement S is sized to 0.1P 0.8P.
As preferably, receiving channel 8 is interior hexagonal shape, and screw 11 top is evenly distributed with six grooves around the part of receiving channel 8, and to extend to receiving channel 8 internal.
nullRelative to traditional cavity body filter，This utility model all adopts albronze to be used as the material of cover board body，Filter cover board common on market mostly adopts the sheet material of surface electrical copper facing or fine copper，Regardless of whether be fine copper or the cost of electro-coppering all of a relatively high，Use the aluminium that albronze is because accounting most on the one hand relatively cheap，Use aluminum to manufacture cover plate and can greatly save material cost，The quality of aluminum and copper is softer on the other hand，Processing is got up easily，Also save processing cost，Simultaneously for the consideration utilizing electric conductivity that copper is good，Albronze can also play the conductive effect the same with fine copper sheet material cost-effective while，Because cover plate of the present utility model is also provided with the boss with the integrated mid portion hollow of cover board body that namely tuning screwed hole extends to cavity direction，The inner ring of boss is copper、Outer ring is aluminum，The internal part contacted with adjusting screw of boss is copper，Without influence on actual conductive effect；And this utility model uses boss to replace the combination of traditional tuned window and tuning swivel nut, it is because processing boss only need to cover board body be stretched, use lathe just can be automatically performed the processing of tuning screwed hole, need not still further pass through to stamp out tuned window and fix tuning swivel nut two to overlap operation, this tuning screwed hole is by the materials processing of cover board body out, this utility model also will not waste material while saving operation, and integrated boss is very firm, without influence on the effect of tuning；Consider the actual demand that present filter tunes, the specification of tuning Self-locking screw is M4-M10 at present, and accordingly, the albronze extensibility adopted due to cover plate is better, the thickness of cover plate only need to control at 1-3mm, and cover plate is light and does not affect result of use, saves material cost further, the height of boss can also control at 1-20mm, it is sufficient to meets the instructions for use of Self-locking screw；nullIt is additionally provided with the tuned window connected with screwed hole along its axis direction inside this utility model boss，This tuned window is relative to the screwed hole cavity closer to wave filter，The diameter of tuned window is less than the diameter of filter tuner Self-locking screw，Electric capacity is formed between inwall and the tuning screw of boss inner ring，Make cover plate is introduced the effect of capacity plate antenna，Reduce the electric current density of tuning screw and cover plate binding site，Reduce the inter-modulated signal level because tuning screw produces with cover plate loose contact，Improve the intermodulation first-pass yield of cavity body filter，The front end of screw departs from downwards when screwed hole enters tuning porose area can squeeze tuned window，And tuned window diameter is less than screwed hole，The material considering tuned window is copper，The elastic force that copper is good can promote tuned window inwardly to extrude to pin Self-locking screw better，Filter cover board is also without an additionally mounted elastic sheet metal，Save material and artificial；nullThis utility model have also been devised a kind of new tuning Self-locking screw，The head of screw is provided with screw thread and forms screw，This screw thread is provided with two sets，Tuning range according to cavity body filter and actually used demand，Diameter >=the M4 of the screw that this utility model screw thread is formed，The Altitude control of corresponding screw is at 1-20mm，Two sections of screw threads of the present utility model are also not attached to，Owing to this utility model adopts copper to make screw，Copper itself has good electric conductivity and ductility，Two thread pitch P of this utility model design are identical again，The diameter of upper screw thread is more than the diameter of lower screw thread，The diameter of upper screw thread and lower screw thread is than for 1.01:1 1.1:1，Owing to the diameter of upper and lower screw thread is different，Screwdriver orders about the power that in screw screw-in cavity body filter process, screw head is subject to and is just no longer uniformly distributed，Owing to two screw threads form a slight dislocation，Such screwdriver drives screw to screw in screw head in the process within cavity body filter can produce slight deformation，Because the power that screw head is subject to not is equally distributed，Have certain deviation，And the screw threads of two dislocation can produce to recover the restoring force of original shape after being subject to the extruding force of screwdriver centered by part between two screw threads and prop up the cavity of wave filter，Thus completing the self-locking of screw，Upper screw thread and lower screw thread can produce a displacement in the axial direction，This displacement S is set as that upper screw thread originally downwardly extended the deviation that location produces with screw position under reality，Described displacement S is sized to 0.1P 0.8P，Existence due to this side-play amount，The uneven of screwdriver urging force can be strengthened，Simultaneously，Consider the self-locking effect of reality，Section diameter between screw thread is 40% the 70% of bar portion diameter，Because this section diameter has the danger of fracture time narrow，The restoring force of two screw threads has counteracting to a certain extent simultaneously，And this section diameter wide time the extruding force that produces of two screw threads inadequate，Self-locking DeGrain，Additionally，It is H65 that this utility model is used for manufacturing the copper material of screw，Neither too hard, nor too soft，Its copper content can also meet the demand of tuning，Copper material fineness≤0.8，Ensure the coefficient of friction on screw surface and filter cover board，Guarantee self-locking effect，Simultaneously again without influence on the effect of tuning，Consider height and the diameter of screw，Spacing between two screw threads controls at 0.1 2mm，And the receiving channel of screw head is interior hexagonal shape，Screw head is evenly distributed with six grooves around the part of receiving channel and extends to inside receiving channel，The top deformation of the more convenient screw of this shape is to obtain better self-locking effect.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment of the present utility model or example.In this manual, the schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example.
While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that: these embodiments can being carried out multiple change, amendment, replacement and modification when without departing from principle of the present utility model and objective, scope of the present utility model is limited by claim and equivalent thereof.
Claims (8)
1. a cavity body filter, including cavity, cover plate and tuning Self-locking screw, described cover plate is for covering the cavity of cavity body filter, cover plate includes cover board body, it is characterized in that, cover board body adopts albronze, this alloy is Copper-Aluminum compound integration alloy, namely one side is copper, one side is aluminum, during use, aluminum is in the face of quasi-cavity, described cover board body is provided with tuning screwed hole, tuning screwed hole is specially the boss integrated with cover board body extended to cavity direction, the mid portion hollow of boss, the inner ring of boss is copper, outer ring is aluminum, it is provided with screwed hole along its axis direction inside boss, it is additionally provided with the tuned window connected with screwed hole along its axis direction inside described boss, this tuned window is relative to the screwed hole cavity closer to wave filter, the diameter of tuned window is less than the diameter of filter tuner Self-locking screw；Tuning Self-locking screw is divided into head and bar portion, Self-locking screw adopts copper to be made, screw one end is head, the other end is bar portion, bar portion stretches into tuned radio frequency parameter in the cavity of wave filter, Self-locking screw is fixed on the cover plate of wave filter by head, apical head is provided with for receiving screwdriver the driving according to this screwdriver to make tuning screw screw in the receiving channel within cavity body filter, the head of screw is provided with screw thread and forms screw, this screw thread is provided with two sets, diameter >=the M4 of the screw that screw thread is formed, between two external threadings and be not attached to, the pitch P of upper and lower two external threadings is all identical, the diameter of upper screw thread is more than the diameter of lower screw thread, the diameter of upper screw thread and lower screw thread is than for 1.01:1 1.1:1, section diameter between two screw threads is 40% the 70% of bar portion diameter.
2. cavity body filter according to claim 1, it is characterised in that the thickness of described cover board body is 1-3mm.
3. cavity body filter according to claim 1, it is characterised in that the height of described boss is 1-20mm.
4. the cavity body filter according to Claims 2 or 3, it is characterised in that the swivel nut that described boss internal thread holes is formed is suitable for the tuning Self-locking screw of M4-M10 specification.
5. cavity body filter according to claim 1, it is characterised in that be additionally provided with cover screw hole on described cover board body, cover plate is by being fixed on cavity through the screw in cover screw hole.
6. cavity body filter according to claim 1, it is characterised in that fineness≤0.8 of the copper that Self-locking screw adopts, copper material is H65.
7. cavity body filter according to claim 1, it is characterized in that, spacing between two screw threads of Self-locking screw is 0.1-2mm, upper screw thread and lower screw thread can produce a displacement in the axial direction, this displacement S is set as that upper screw thread originally downwardly extended the deviation that location produces with screw position under reality, and described displacement S is sized to 0.1P 0.8P.
8. cavity body filter according to claim 1, it is characterised in that the receiving channel of Self-locking screw is interior hexagonal shape, screw head is evenly distributed with six grooves around the part of receiving channel and extends to inside receiving channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520918584.0U CN205376700U (en) | 2015-11-18 | 2015-11-18 | Cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520918584.0U CN205376700U (en) | 2015-11-18 | 2015-11-18 | Cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205376700U true CN205376700U (en) | 2016-07-06 |
Family
ID=56260734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520918584.0U Withdrawn - After Issue CN205376700U (en) | 2015-11-18 | 2015-11-18 | Cavity filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205376700U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304988A (en) * | 2015-11-18 | 2016-02-03 | 强胜精密机械(苏州)有限公司 | Cavity filter |
| CN106910970A (en) * | 2017-03-03 | 2017-06-30 | 华南理工大学 | A kind of mode filter of cavity four |
-
2015
- 2015-11-18 CN CN201520918584.0U patent/CN205376700U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304988A (en) * | 2015-11-18 | 2016-02-03 | 强胜精密机械(苏州)有限公司 | Cavity filter |
| CN105304988B (en) * | 2015-11-18 | 2018-10-12 | 强胜精密机械(苏州)有限公司 | A kind of cavity body filter |
| CN106910970A (en) * | 2017-03-03 | 2017-06-30 | 华南理工大学 | A kind of mode filter of cavity four |
| CN106910970B (en) * | 2017-03-03 | 2020-08-18 | 华南理工大学 | Cavity four-mode filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160706 Effective date of abandoning: 20181012 |