CN109786908B - Tuning cover plate and filter using same - Google Patents
Tuning cover plate and filter using same Download PDFInfo
- Publication number
- CN109786908B CN109786908B CN201910182110.7A CN201910182110A CN109786908B CN 109786908 B CN109786908 B CN 109786908B CN 201910182110 A CN201910182110 A CN 201910182110A CN 109786908 B CN109786908 B CN 109786908B
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- nut
- bolt
- damping
- cover plate
- ring
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- 238000013016 damping Methods 0.000 claims abstract description 39
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 229910052755 nonmetal Inorganic materials 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007514 turning Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
Landscapes
- Connection Of Plates (AREA)
- Bolts, Nuts, And Washers (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention relates to the field of signal processing equipment, in particular to a tuning cover plate applied to a filter, which adopts a nut with damping embedded on one side in the nut. The damping is likewise biased towards the tuning chamber when the nut is installed. Thus, when the bolt passes through the nut, the end part of the bolt is firstly contacted with the internal thread of the nut, and finally self-locking positioning is carried out through damping, and the damping filters out metal scraps adhered to the end part of the bolt so as to be accumulated in the nut, so that interference on signals inside the filter is reduced.
Description
Technical Field
The invention relates to the field of signal processing equipment, in particular to a tuning cover plate and a filter using the same.
Background
The filter is widely used as a frequency selection device in the communication field, especially in the radio frequency communication field, and in a base station for transmitting and receiving signals in a communication system, the filter is used for selecting communication signals and filtering clutter or interference signals outside the frequency of the communication signals.
Currently, frequency tuning of cavity filters is typically accomplished by tuning screws on the filter cover plate. After the resonant frequency is adjusted, in order to prevent the tuning screw from loosening, a fixing nut is generally added to the portion, located outside the cavity, of the tuning screw, and the addition of the fixing nut not only consumes more material cost, but also often has unsatisfactory reinforcement effect due to the use of the fixing nut. The structure of locking through the double nuts is easy to pull up the screw rod in the locking process due to the existence of the thread gap, and the debugging result is changed to influence the bad result of the debugging precision. The mode of making up for it among the prior art mainly relies on the debugging to accomplish the back to carry out the point to the nut and glue locking.
In addition, there are also a few structures in the industry that use self-locking screws, such as: cutting grooves and turning staggered threads on the screw rod, and pulling the threads apart by the staggered threads when the common press-riveting nut is screwed in for use, so that axial stretching force is generated at the cutting groove position, and friction force between threads is increased to achieve the aim of self locking; the problem that this kind of auto-lock structure exists is because screw thread and rotatory grooving precision require highly, and processing cost is high, and the individual precision difference easily causes the locking force aspect unstable and use the inefficacy risk repeatedly big simultaneously, and the screw and the rotatory precision difference of nut in the matching can produce a small amount of metal fragments and take to fall to the resonant cavity by the tip of screw, this can influence the performance of wave filter.
Therefore, it is necessary to design a tuning cover plate which can be repeatedly used and can prevent metal scraps from falling into a resonant cavity, is convenient to assemble and stable in signal, and a filter using the tuning cover plate.
Disclosure of Invention
The invention provides a tuning cover plate and a filter using the same, which aim to solve the defects that a tuning screw of the filter is unstable and easy to loosen in assembly and metal scraps cannot be blocked in the assembly process.
The tuning cover plate is used for sealing the cavity of the cavity filter and comprises a cover plate body made of metal, a plurality of through holes are formed in the cover plate body, and nuts are arranged in the through holes, wherein the nuts comprise annular nut bodies and screw holes, damping made of nonmetal materials is embedded in the screw holes, the damping is embedded in the nuts and is located at one end side, and one end of each bolt is screwed into the screw hole of the nut and penetrates through the damping.
Further, the damping is of a solid sheet structure, and the outer diameter of the damping is larger than the inner diameter of the screw hole of the nut.
Further, the damping is of an annular structure, the outer diameter of the damping is larger than the inner diameter of the screw hole of the nut, and the inner diameter of the damping is smaller than or equal to the inner diameter of the screw hole of the nut.
Further, the nut comprises a first spiral ring and a second spiral ring which extends from the first spiral ring in a derivative mode, and the damping is embedded in the second spiral ring and is far away from the direction in which the bolt is screwed into the screw hole.
Further, the tuning cover plate further comprises a limiting ring, the limiting ring is located on the outer peripheral side of the bolt in the direction of the screw hole of the nut, and the limiting ring abuts against the nut or the nut and the damper.
Further, the aperture of the hole formed by the limiting ring is larger than the outer diameter of the bolt, and the limiting ring is not contacted with the bolt.
Further, the limiting ring is provided with a plurality of limiting protrusions, the plurality of limiting protrusions are uniformly arranged at intervals to form a ring shape, the aperture of the ring shape is larger than the outer diameter of the bolt, and the outer surface of the limiting ring is provided with a chamfer surface and is not contacted with the bolt.
Further, the limit ring is formed by extending from the cover plate body in a derivative mode or from one side, far away from the bolt, of the nut, and screwed into the nut in a derivative mode.
Further, the stop collar includes an annular body and a projection extending from the annular body that abuts against one end of the nut or nut and damper.
The cavity filter comprises the tuning cover plate, wherein the tuning cover plate is arranged on a tuning cavity made of metal materials.
The tuning cover plate adopts a nut with a damping, and the damping is embedded at one side in the nut. When the nut is arranged, the damping is also arranged in a biased tuning cavity. When the bolt is screwed into the penetrating nut, the end part of the bolt is contacted with the internal thread of the nut, and finally the penetrating damping is used for self-locking positioning. The damping will filter out metal debris that adheres to the bolt end and is caused by friction with the nut and will retain it in the nut to reduce the impact on the filter performance.
Drawings
FIG. 1 is a schematic diagram of a filter with a tuning cover according to the present invention;
FIG. 2 is a schematic exploded view of a tuning cover of the filter of FIG. 1;
FIG. 3 is a schematic perspective view of the cross-sectional structure of FIG. 2;
fig. 4 is a schematic cross-sectional structure of the tuning cover plate of fig. 2;
FIG. 5 is a schematic cross-sectional view of a second embodiment of the present invention;
FIG. 6 is an enlarged schematic view of the portion A in FIG. 5;
FIG. 7 is a schematic cross-sectional view of a third embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view of a fourth embodiment of the present invention;
FIG. 9 is a bottom schematic view of the nut structure of FIG. 8;
FIG. 10 is a schematic bottom view of a nut structure according to a fifth embodiment of the present invention;
fig. 11 is a schematic cross-sectional structure of a sixth embodiment of the present invention.
Detailed Description
The present invention will be described in terms of various embodiments with reference to the accompanying drawings. In the drawings, elements having similar structures or functions will be denoted by the same reference numerals. The component sizes and features in the drawings are merely for convenience in describing and disclosing various embodiments of the invention and are not intended to be an exhaustive description of the invention nor to limit the scope of the invention.
In the following description, specific details are set forth such as the particular process, interfaces, techniques, etc. in order to provide a thorough understanding of the embodiments disclosed herein. However, it will be understood by those skilled in the art that the technology disclosed herein may be practiced in specific examples that depart from these specific details, and that a person of ordinary skill in the art will be able to practice the technology in various embodiments, which, even if not explicitly described or shown herein, nevertheless fall within the technology principles and are not beyond the spirit and scope thereof. In some embodiments, well-known devices, methods have not been described in detail so as not to unnecessarily obscure the technical description disclosed herein. All statements herein reciting principles, aspects, and embodiments are intended to encompass both structural and functional equivalents thereof. Additionally, such equivalents include both currently known equivalents as well as further developed equivalents, such as any and all elements developed that perform the same function, even though structures may differ.
Referring to fig. 1-4, a filter 100 according to an embodiment of the present invention includes a cover plate 10 made of metal materials such as aluminum, iron, copper, and alloys thereof by die casting, turning, and 3D printing, wherein the cover plate 10 is used to cover a metal cavity 20 of a cavity filter. The ductility of the metal cover plate 10 is good, and the thickness of the metal cover plate is controlled to be only a few millimeters. The cover plate 10 is provided with a plurality of through holes 11 penetrating into the metal cavity, and tuning screws 30 are arranged in the through holes 11. Specifically, the through hole 11 includes two parts, namely, a first hole part 11a and a second hole part 11b communicating with the first hole part 11a, and central axes of the first hole part 11a and the second hole part 11b overlap to maintain coaxiality. In fig. 4 of the present invention, the inner aperture of the first hole portion 11a is larger than the inner aperture of the second hole portion 11b, so that the second hole portion 11b is formed by an integrally formed retainer ring 10a which is derived from the cap body 10. The limiting ring 10a is closer to the metal cavity 20 of the filter 100, and supports and limits the nut 31 or other components installed in the through hole 11, so that the nut 31 and other components loaded on the cover plate 10 are stably installed and cannot fall or loosen.
In the embodiment of the present invention, the outer surface of the nut 31 is provided with threads 312, and the threads may be provided on the entire outer surface of the nut 31 or on the surface of the nut 31 which is embedded in the through hole 11 and contacts the cover plate 10. Considering the actual requirement of the current filter cover plate, the inner surface of the through hole 11 may not be provided with internal threads, and only the outer diameter of the outer surface part with the threads 312, which is in contact with the nut 31 and the cover plate 10, is slightly larger than that of the through hole 11, so that the nut 31 and the cover plate are assembled in an interference fit manner. A screw hole 311 is provided at the center of the nut 31. As shown in fig. 2, the nut 31 in this embodiment includes a first spiral ring 31a and a second spiral ring 31b integrally formed with the first spiral ring 31a, and the second spiral ring is embedded in the through hole 11. The screw hole 311 penetrates the first and second spiro rings 31a and 31b. A bolt 32 is mounted in the screw hole 311. The outer surface of the bolt 32 is provided with external threads, and the screw hole 311 of the nut 31 is internally provided with internal threads matched with the external threads of the bolt 32. The first spiral ring 31a is internally provided with internal threads to match the external threads of the bolt 32. The second screw hole 311b is provided with a second screw hole 311b in the second screw ring 31b, and the second screw hole 311b has a larger aperture than the first screw hole 311a of the first screw ring 31a, so that a damper 33 is provided in the second screw hole 311b having a relatively large aperture. The damper 33 is in the form of a solid sheet or a ring with a hole 331. When the rotary bolt 32 is mounted on the nut 31, the thread of the bolt 32 is firstly contacted with the internal thread of the nut 31 on the cover plate 10, then the end part of the bolt 32 penetrates through the damper 33 made of non-metal materials such as rubber, nylon or polypropylene, and the damper 33 forms reactive force extrusion friction on the bolt 32 so as to realize the self-locking function of the bolt 32. The end of the bolt 32 can also be tightly abutted against the damper without penetrating the damper. Further, the nut and the bolt are affected by the matched screw thread precision in practical application, so that the bolt 32 is loosened due to repeated use; moreover, friction scraps are generated due to the influence of thread precision when the bolt 32 is assembled with the nut 31, the damping 33 is arranged in a direction close to the tuning cavity, the lower part of the damping 33 is not provided with internal threads which are mutually contacted with the bolt 32, metal scraps are adhered to the bolt 32 due to the mutual friction of the bolt 32 and the nut 31, the bolt part adhered with the metal scraps passes through the damping 33, the damping material is blocked, the generated metal scraps are deposited in the first screw hole 311a and cannot fall into the tuning cavity, and the metal scraps are not generated due to the friction with the nut through the bolt part passing through the damping 33, so that the influence of the metal scraps on the performance of the filter is improved. In the embodiment of the present invention, the diameter of the screw hole 331 formed in the damper 33 is slightly smaller than the diameter of the bolt 32, so as to increase the friction between the two to achieve good self-locking and metal debris filtering effects.
In this embodiment, the stop collar 10a not only can limit the nut 31 from falling off, but also can abut against the damper 33 according to practical applications. In various embodiments of the present invention, the diameter of the aperture formed by the stop collar 10a is less than the maximum outer diameter of the damper 33 to prevent the damper 33 from falling out of the nut 32 into the metal cavity 20.
Referring to fig. 5 to 6, the second embodiment of the present invention is different from the first embodiment in that the retainer ring 10a is provided with a chamfer 10b. When the nut 32 is assembled in the through hole 11, the stop collar 10a is formed by a stamping process, the chamfer 10b facilitates the damper 33 to be pressed into the nut 31 by stamping, and the aperture of the stop collar 10a is smaller than the outer diameter of the damper 33 and larger than the inner diameter of the damper 33. The damper 33 is defined in the nut 31, and the bolt 32 is capable of smoothly penetrating the retainer ring 10a.
Referring to fig. 7, which is a third embodiment of the present invention, the difference from the above-described embodiment is that the height of the nut 32 is set to be substantially the same as the thickness of the cap plate 10, so that the matching length of the bolt 32 and the nut 31 can be shortened to reduce the generation of metal chips. The upper surface 31C of the nut 31 is coplanar with the upper surface 10C of the cover plate 10. The damping 33 is still embedded in the nut 31.
Referring to fig. 8-9, in a fourth embodiment of the present invention, the nut 31 is inserted into the cover plate 10, and the screw 312 is engaged with the inner wall of the through hole 11. In various embodiments of the present invention, the thread 312 may be a spiral thread or may be a plurality of mutually parallel transverse, vertical or net-shaped lines, so as to not only increase external friction, but also be well matched with the through hole 11. The lower end of the nut 31 extends into the tuning cavity, and the height of the nut 31 is greater than the thickness of the cover plate 10. The damping 33 is mounted on the nut 31 at an end remote from the cover plate 10. In this embodiment a stop collar 10a extends from the nut 31 to extend against the damper 33. The limiting ring 10a is provided with a chamfer surface 10b, and the inner diameter of the limiting ring 10a is larger than the diameter of the bolt 32 so as to facilitate the non-contact penetration of the bolt. Thus, when the bolt 31 passes through the nut 32 and the damper 33, the bolt 31 passes through the retainer ring 10a without contacting the same, since the outer diameter of the bolt 31 is smaller than the inner diameter of the retainer ring 10a.
In addition to the above structure, referring to fig. 10, in another embodiment of the present invention, the stop collar 10a may be a plurality of stop protrusions extending from the nut 31. In this embodiment, the four limit protrusions are uniformly arranged in a ring shape at intervals, the diameter of the ring is larger than the outer diameter of the bolt 32, and the limit ring 10a is not in contact with the bolt 32.
Referring to fig. 11, a sixth embodiment of the present invention is shown. The present embodiment differs from the above embodiments in that the above retainer ring 10a is derived from the cover plate 10 or from the nut 31. In this embodiment, a stop collar 34 is further included that is at least partially staked into the through bore 11. The stop collar 34 includes an annular body 34a and a projection 34b extending from the annular body 34 a. The outer diameter of the protrusion 34b may be slightly larger than the inner diameter of the through hole 11, so that when the nut 31 with the damper 33 is installed in the through hole 11, the stop collar 34 is installed at the other side of the direction in which the nut is screwed into the through hole 11 in order to prevent the nut 31 from falling off or being excessively biased to one side. Of course, the outer diameter of the protrusion 34b may be slightly larger than the inner diameter of the second screw hole 311b of the nut, so that the protrusion 34b is caught in the second screw hole 311b such that the retainer ring 34 is held on the nut 32. The inner diameter of the central bore 34C of the stop collar 34 is also larger than where the outer diameter of the bolt 32 does not meet, and the boss 34b abuts against one end of the nut or nut and damper to prevent it from falling out and to stop.
In the tuning cover plate 10 of the invention, the nut 32 with the damping 33 is adopted, and the damping 33 is embedded at one side in the nut 31. The damping 33 is likewise biased towards the tuning chamber when the nut 31 is installed. Thus, when the bolt 32 passes through the nut 31, the end of the bolt 32 is firstly contacted with the internal thread of the nut 31, and finally the self-locking positioning is carried out through the damping 33, and the damping 33 also filters out metal scraps adhered to the end of the bolt 32 so as to be retained in the nut, thereby reducing the influence on the performance of the filter 100.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (9)
1. The utility model provides a tuning apron, is including the apron body that is equipped with a plurality of through-holes, install tuning screw, its characterized in that in the through-hole: the tuning screw comprises a nut embedded in the through hole and a bolt penetrating the nut, the nut comprises a first spiral ring and a second spiral ring integrally formed with the first spiral ring, and the second spiral ring is embedded and fixed in the through hole; the nut is internally provided with a non-metal damper which is embedded in the second screw ring of the nut and is far away from one end side of the direction in which the bolt is screwed into the screw hole, and one end of the bolt is screwed into the screw hole of the nut and penetrates through the damper;
and the limiting ring is abutted against the damping to prevent the damping from falling off from the nut.
2. The tuning cover plate of claim 1, wherein: the damping is of a solid sheet structure, and the outer diameter of the damping is larger than the inner diameter of the screw hole.
3. The tuning cover plate of claim 1, wherein: the damping is of an annular structure, the outer diameter of the damping is larger than the inner diameter of the screw hole, and the inner diameter of the damping is smaller than or equal to the inner diameter of the screw hole.
4. A tuning cover plate according to any one of claims 2 or 3, wherein: the second spiral ring is formed by extending the first spiral ring in a derived mode, a first screw hole matched with the external thread of the bolt is formed in the first spiral ring, a second screw hole is formed in the second spiral ring, the aperture of the second screw hole is larger than that of the first screw hole, the damping is contained in the second screw hole, and the damping is embedded in the second spiral ring and is far away from the direction of the screw hole, in which the bolt is screwed in.
5. The tuning cover plate of claim 1, wherein: the nut comprises the limiting ring, the limiting ring is positioned on the periphery of the bolt in the direction of screwing out the screw hole of the nut, and the limiting ring is abutted against the nut or the nut and the damper.
6. The tuning cover plate of claim 5, wherein: the aperture of a hole formed by the limiting ring is larger than the outer diameter of the bolt, and the limiting ring is not contacted with the bolt.
7. The tuning cover plate of claim 5, wherein: the limiting ring is provided with a plurality of limiting protrusions, the plurality of limiting protrusions are uniformly arranged at intervals to form a ring shape, the aperture of the ring shape is larger than the outer diameter of the bolt, and the outer surface of the limiting ring is provided with a chamfer surface and is not contacted with the bolt.
8. The tuning cover plate of claim 5, wherein: the stop collar includes an annular body and a projection extending from the annular body that abuts against one end of the nut or nut and damper.
9. A cavity filter, characterized by: the filter comprises the tuning cover plate of any one of claims 1-8, wherein the tuning cover plate is arranged on a tuning cavity made of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910182110.7A CN109786908B (en) | 2019-03-11 | 2019-03-11 | Tuning cover plate and filter using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910182110.7A CN109786908B (en) | 2019-03-11 | 2019-03-11 | Tuning cover plate and filter using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109786908A CN109786908A (en) | 2019-05-21 |
| CN109786908B true CN109786908B (en) | 2024-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910182110.7A Active CN109786908B (en) | 2019-03-11 | 2019-03-11 | Tuning cover plate and filter using same |
Country Status (1)
| Country | Link |
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| CN (1) | CN109786908B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111193084B (en) * | 2020-01-07 | 2021-07-20 | 南京华脉科技股份有限公司 | Filter cover plate |
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| CN102509819A (en) * | 2011-10-31 | 2012-06-20 | 深圳市大富科技股份有限公司 | Dielectric filter, locking nut, tuning device and communication radio-frequency apparatus |
| CN202888366U (en) * | 2012-10-12 | 2013-04-17 | 深圳市大富科技股份有限公司 | Filter cover plate and filter |
| CN203013892U (en) * | 2012-11-23 | 2013-06-19 | 京信通信系统（中国）有限公司 | Cavity filter and tuner thereof |
| CN204303957U (en) * | 2015-01-09 | 2015-04-29 | 旭光（赣州）电子有限公司 | A kind of cavity body filter |
| CN105742773A (en) * | 2016-02-29 | 2016-07-06 | 深圳三星通信技术研究有限公司 | Cavity filter and self-locking tuning assembly thereof |
| WO2017113170A1 (en) * | 2015-12-30 | 2017-07-06 | 深圳市大富科技股份有限公司 | Cavity filter |
| US10084222B1 (en) * | 2017-03-22 | 2018-09-25 | Ace Technologies Corporation | RF filter for improving PIMD performance |
| CN108631027A (en) * | 2017-03-17 | 2018-10-09 | Ace技术株式会社 | Utilize the RF cavity body filters and its manufacturing method of elastomer |
| CN209544572U (en) * | 2019-03-11 | 2019-10-25 | 深圳市安特无线设备有限公司 | A kind of filter of novel tuning cover board |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150049452A (en) * | 2013-10-30 | 2015-05-08 | 한국전자통신연구원 | Rf cavity filter which comprises tunning bolt holding member and said tunning bold holding member |
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2019
- 2019-03-11 CN CN201910182110.7A patent/CN109786908B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509819A (en) * | 2011-10-31 | 2012-06-20 | 深圳市大富科技股份有限公司 | Dielectric filter, locking nut, tuning device and communication radio-frequency apparatus |
| CN202888366U (en) * | 2012-10-12 | 2013-04-17 | 深圳市大富科技股份有限公司 | Filter cover plate and filter |
| CN203013892U (en) * | 2012-11-23 | 2013-06-19 | 京信通信系统（中国）有限公司 | Cavity filter and tuner thereof |
| CN204303957U (en) * | 2015-01-09 | 2015-04-29 | 旭光（赣州）电子有限公司 | A kind of cavity body filter |
| WO2017113170A1 (en) * | 2015-12-30 | 2017-07-06 | 深圳市大富科技股份有限公司 | Cavity filter |
| CN105742773A (en) * | 2016-02-29 | 2016-07-06 | 深圳三星通信技术研究有限公司 | Cavity filter and self-locking tuning assembly thereof |
| CN108631027A (en) * | 2017-03-17 | 2018-10-09 | Ace技术株式会社 | Utilize the RF cavity body filters and its manufacturing method of elastomer |
| US10084222B1 (en) * | 2017-03-22 | 2018-09-25 | Ace Technologies Corporation | RF filter for improving PIMD performance |
| CN209544572U (en) * | 2019-03-11 | 2019-10-25 | 深圳市安特无线设备有限公司 | A kind of filter of novel tuning cover board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109786908A (en) | 2019-05-21 |
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