CN218123688U - Novel filter frequency tuning structure - Google Patents
Novel filter frequency tuning structure Download PDFInfo
- Publication number
- CN218123688U CN218123688U CN202221659285.6U CN202221659285U CN218123688U CN 218123688 U CN218123688 U CN 218123688U CN 202221659285 U CN202221659285 U CN 202221659285U CN 218123688 U CN218123688 U CN 218123688U
- Authority
- CN
- China
- Prior art keywords
- frequency tuning
- cover plate
- tuning structure
- filter frequency
- novel filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000919 ceramic Substances 0.000 claims abstract description 11
- 238000001746 injection moulding Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 229910052755 nonmetal Inorganic materials 0.000 abstract description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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Abstract
The utility model discloses a novel wave filter frequency tuning structure, include: the resonator comprises a cavity (2), a resonant rod (3), a tuning screw (4) and a cover plate (1), wherein the tuning screw comprises a ceramic part and a low-loss plastic part. The utility model has the advantages that the filter with the nonmetal frequency tuning structure is provided, the PIM value is effectively reduced, and the instability of PIM of the product caused by metal debris generated by the traditional metal frequency tuning structure is avoided; meanwhile, the application of the non-metal frequency tuning structure can improve the bearing power of the filter to a greater extent.
Description
Technical Field
The utility model relates to a wave filter technical field especially relates to a novel wave filter frequency tuning structure.
Background
With the continuous development of mobile communication systems, communication is accurately positioned, higher receiver sensitivity is required, and interference among signals is reduced, a filter is an important component module of the communication system, passive intermodulation (PIM for short) and bearing power are very important indexes of the filter, the interference among signals can be effectively reduced by a low PIM value, the receiver sensitivity is improved, and the high bearing power can meet the requirements of higher power application and the occurrence of an ignition phenomenon.
Chinese utility model patent publication No. CN207183476U has publicly opened low passive intermodulation medium waveguide filter, including a plurality of medium single chamber, the medium single chamber passes through the coupling window and links to each other in proper order, and the edge is equipped with the fillet structure. Compared with the prior art, the beneficial effects of the utility model are that: by means of fillet treatment of the edge of the dielectric waveguide filter, the silver coating performance of the dielectric waveguide filter can be improved, a right-angle edge is replaced, silver coating is uniform, the linearity of a silver coating layer of the dielectric waveguide filter is improved, the current density of the edge position is reduced, and the passive intermodulation of the whole dielectric waveguide filter is reduced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to reduce passive intermodulation value from other aspects, provide a novel wave filter frequency tuning structure for this reason.
The technical scheme of the utility model is that: a novel filter frequency tuning structure comprising: the tuning rod comprises a cavity, a resonant rod, a tuning screw and a cover plate, wherein the tuning screw comprises a ceramic part and a low-loss plastic part.
The ceramic part is embedded within the low loss plastic part in the above solution.
The improvement of the scheme is that the part of the tuning screw penetrating through the cover plate is wrapped with a plastic screw sleeve.
In the scheme, the tuning screw is fixedly mounted on the cover plate by a nut.
In the scheme, the plastic thread insert is formed on the cover plate in an injection molding mode.
In the scheme, the cover plate is provided with a through hole, and the plastic thread insert is arranged in the through hole.
The outer surface of the tuning screw rod in the scheme is coated or sprayed with a protective film.
The utility model has the advantages that the filter with the nonmetal frequency tuning structure is provided, the PIM value is effectively reduced, and the instability of the PIM product caused by metal debris generated by the traditional metal frequency tuning structure is avoided; meanwhile, the application of the non-metal frequency tuning structure can improve the bearing power of the filter to a greater extent.
Drawings
Fig. 1 is a schematic view of embodiment 1 of the present invention;
fig. 2 is a schematic view of embodiment 3 of the present invention;
in the figure, the structure comprises a cover plate 1, a cover plate 2, a cavity 3, a resonance rod 4, a tuning screw rod 5 and a nut.
Detailed Description
The technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the disclosed embodiments are merely exemplary of the invention, and are not intended to limit the invention to the precise embodiments disclosed. Based on the embodiments in the present invention, all other embodiments of the ordinary skilled person in the art without creative work belong to the protection scope of the present invention.
The utility model discloses a: the resonator comprises a cavity 2, a resonant rod 3, a tuning screw 4 and a cover plate 1, wherein the tuning screw comprises a ceramic part and a plastic part. The plastic part is preferably low-loss plastic, such as plastic with a relative dielectric constant larger than 2.1 and a loss tangent smaller than 0.01, the tuning screw is self-locked on the cover plate, and the cover plate is provided with a through hole matched with the tuning screw.
As embodiment 1 of the present invention, as shown in fig. 1, the ceramic part is embedded within the low-loss plastic part. The low loss plastic part forms the upper part of the tuning screw and the ceramic part forms the lower part of the tuning screw. The frequency is tuned using the ceramic part to reduce the PIM value. The plastic part and the cover plate are matched and mounted, so that metal wires generated when metal materials are adopted are avoided.
As embodiment 2 of the present invention, the low-loss plastic part is embedded within the ceramic part. The low loss plastic part forms the lower portion of the tuning screw and the ceramic part forms the upper portion of the tuning screw.
As embodiment 3 of the present invention, as shown in fig. 2, the portion of the tuning screw passing through the cover plate is wrapped with a plastic thread insert. The plastic thread insert is formed on the cover plate in an injection molding mode, or a through hole is formed in the cover plate, and the plastic thread insert is installed in the through hole. The PIM value can be further reduced by adding a plastic thread insert.
As embodiment 4 of the present invention: the difference from the embodiment 1 is that the tuning screw is coated or sprayed with a protective film on the outer surface to reduce the friction with the cover plate.
The installation method of example 1 is as follows: the resonant rod is fixed or welded on the resonant table of the cavity through a screw, the tuning screw directly penetrates through the through hole of the cover plate, the through hole is a threaded hole, the cover plate can be fixed on the cavity through a screw or solder paste in a welding mode, and the tuning screw can be self-locked on the cover plate through the threaded hole and also can be locked on the cover plate through a nut.
The installation method of example 3 is as follows: the resonance rod is fixed or welded on the cavity resonance table through a screw, and a plastic threaded sleeve is arranged in the cover plate hole or a threaded sleeve is directly injection-molded on the cover plate; the tuning screw directly screws through the plastic thread insert on the cover plate, the cover plate can be fixed on the cavity through screws or solder paste in a welding mode, and the tuning screw can be self-locked on the cover plate and also can be locked on the cover plate through a nut.
Claims (7)
1. A novel filter frequency tuning structure comprising: cavity (2), resonance bar (3), tuning screw rod (4) and apron (1), the resonance bar passes through fix with screw or welded fastening on the cavity resonance bench, the apron passes through above screw or the solder paste welding cavity, characterized by: the tuning screw includes a ceramic portion and a low-loss plastic portion.
2. The novel filter frequency tuning structure of claim 1, wherein: the ceramic part is embedded within the low loss plastic part.
3. The novel filter frequency tuning structure of claim 1, wherein: the part of the tuning screw penetrating through the cover plate is wrapped with a plastic threaded sleeve.
4. The novel filter frequency tuning structure of claim 1, wherein: the tuning screw is fixedly mounted on the cover plate by a nut (5).
5. A novel filter frequency tuning structure as claimed in claim 3, characterized by: the plastic thread insert is formed on the cover plate in an injection molding mode.
6. A novel filter frequency tuning structure as claimed in claim 3, characterized by: the cover plate is provided with a through hole, and the plastic threaded sleeve is arranged in the through hole.
7. The novel filter frequency tuning structure of claim 1, wherein: and a protective film is coated or sprayed on the outer surface of the tuning screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221659285.6U CN218123688U (en) | 2022-06-30 | 2022-06-30 | Novel filter frequency tuning structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221659285.6U CN218123688U (en) | 2022-06-30 | 2022-06-30 | Novel filter frequency tuning structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218123688U true CN218123688U (en) | 2022-12-23 |
Family
ID=84514891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221659285.6U Expired - Fee Related CN218123688U (en) | 2022-06-30 | 2022-06-30 | Novel filter frequency tuning structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218123688U (en) |
-
2022
- 2022-06-30 CN CN202221659285.6U patent/CN218123688U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20221223 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |