CN112615115A - Filtering tuning device - Google Patents
Filtering tuning device Download PDFInfo
- Publication number
- CN112615115A CN112615115A CN202011467779.XA CN202011467779A CN112615115A CN 112615115 A CN112615115 A CN 112615115A CN 202011467779 A CN202011467779 A CN 202011467779A CN 112615115 A CN112615115 A CN 112615115A
- Authority
- CN
- China
- Prior art keywords
- cover plate
- adjusting
- resonant
- screw
- outer cover
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention provides a filtering tuning device, which comprises a metal cavity with an opening at one end, an outer cover plate arranged at the opening end of the metal cavity, a resonant column arranged in the metal cavity, an adjusting cover plate and an adjusting screw rod, wherein the outer cover plate is arranged at the opening end of the metal cavity; the adjusting cover plate is arranged between the open end of the metal cavity and the outer cover plate; a resonant disc is formed at one end of the resonant column close to the adjusting cover plate, a space is formed between the resonant disc and the adjusting cover plate, and the resonant disc and the adjusting cover plate form capacitive coupling; the adjusting screw is mounted on the outer cover plate in a threaded mode and used for adjusting the distance between the adjusting cover plate and the resonant disk, and therefore the resonant frequency is adjusted. The invention has the advantages of large adjustable range of resonant frequency, high power capacity limit and high mutual adjustment of metal cavities.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of radio frequency communication, in particular to a filtering tuning device.
[ background of the invention ]
With the rapid development of communication technology, a large number of communication devices are accessed, the spectrum resources are increasingly tense, the electromagnetic frequency of each system is more and more dense, and the problem of congestion or interference inevitably occurs, which has become a major challenge for the development of communication systems. In order to ensure the normal operation of the system, interference signals need to be filtered, and the filter is used as an indispensable component of the communication system and is widely applied to the communication field. The metal cavity filter has high no-load Q value, low loss, high power capacity limit and far parasitic passband, and is widely applied to modern communication systems.
The metal cavity filter is typically used more often than the coaxial cavity filter. The resonant cavity consists of a metal cavity, a resonant column, a cover plate and an adjusting screw rod. Adjusting screw one end stretches into in the cavity, and the other end is worn outside the apron and is installed adjusting nut, controls adjusting screw through adjusting nut and stretches into the degree of depth in the metal cavity to the realization is adjusted the resonance frequency in real time. Due to the limitations of miniaturization, frequency adjustable range, intermodulation, power and the like, the coaxial cavity with the structure is limited in a communication system with miniaturization, high intermodulation and high power, and the requirement of indexes of actual engineering is often difficult to meet.
[ summary of the invention ]
The invention mainly aims to provide a filtering tuning device which is large in adjustable range of resonant frequency, high in power tolerance and high in mutual adjustment of metal cavities.
In order to achieve the above object, the present invention provides a filter tuning apparatus, which includes a metal cavity with an opening at one end, an outer cover plate mounted on the opening end of the metal cavity, a resonant column mounted in the metal cavity, an adjusting cover plate, and an adjusting screw; the adjusting cover plate is arranged between the open end of the metal cavity and the outer cover plate; a resonant disc is formed at one end of the resonant column close to the adjusting cover plate, a space is formed between the resonant disc and the adjusting cover plate, and the resonant disc and the adjusting cover plate form capacitive coupling; the adjusting screw is mounted on the outer cover plate in a threaded mode and used for adjusting the distance between the adjusting cover plate and the resonant disc, and therefore the resonant frequency is adjusted.
As a preferable technical solution, the outer cover plate is provided with a screw hole, the adjusting screw is mounted to the screw hole in a threaded manner, a first end of the adjusting screw extends out of the screw hole and is located outside the outer cover plate, a second end of the adjusting screw is in contact with the adjusting cover plate, and the adjusting cover plate is pressed by screwing the adjusting screw so as to deform the adjusting cover plate, thereby changing a distance between the adjusting cover plate and the resonance disk.
As a preferable technical solution, the outer cover plate is provided with a through hole, a fixing nut is fixedly arranged at a position of the outer cover plate corresponding to the through hole, the adjusting screw is threadedly mounted to the fixing nut, a first end of the adjusting screw extends out of the fixing nut and is located outside the outer cover plate, a second end of the adjusting screw passes through the through hole and contacts with the adjusting cover plate, and the adjusting cover plate is squeezed by screwing the adjusting screw so as to deform the adjusting cover plate, so that a distance between the adjusting cover plate and the resonance disk can be changed.
As a preferred technical scheme, the resonance column is a cylindrical structure, and the resonance disk and the resonance column are integrally formed.
As a preferable technical solution, a step is formed at the bottom in the metal cavity, and the resonant column is mounted to the step.
Preferably, an installation protrusion is formed at an end of the step, an installation position is formed at an end of the resonant column far away from the adjusting cover plate, and the installation protrusion is installed in the installation position, so that the resonant column is installed on the step.
As a preferred technical scheme, the peripheries of the outer cover plate and the adjusting cover plate are mounted at the opening end of the metal cavity through fasteners.
As a preferable technical scheme, a concave position is arranged at a position where the adjusting cover plate is contacted with the second end of the adjusting screw, and the concave position is matched with the second end of the adjusting screw to avoid the sliding phenomenon of the adjusting screw in the screwing process.
As a preferred technical scheme, the adjusting screw rod is opposite to the resonance column, and the second end of the adjusting screw rod is hemispherical.
As a preferable technical solution, the adjusting device further comprises a fixing nut, the fixing nut is sleeved on the first end of the adjusting screw, and the adjusting screw can be locked to the outer cover plate by screwing the fixing nut.
Compared with the traditional coaxial cavity filter, the filtering tuning device provided by the invention has the advantages that the adjusting range of the resonant frequency is larger, the power capacity limit is high, and the problem of the discontinuity of burrs and impedance at the position caused by the through hole formed in the center of the resonant column can be effectively avoided, so that the metal cavity has high intermodulation, and the index requirement of the practical engineering is met.
[ description of the drawings ]
To further disclose the specific technical content of the present disclosure, please refer to the attached drawings, wherein:
fig. 1 is a schematic structural diagram of a filtering tuning apparatus according to an embodiment of the present invention;
FIG. 2 is an exploded view of the filter tuning apparatus shown in FIG. 1;
fig. 3 is a schematic cross-sectional view of the filter tuning apparatus shown in fig. 1.
Description of the symbols:
Adjusting cover 40
Adjusting screw 50
Retaining nut 60
[ detailed description ] embodiments
Referring to fig. 1 to 3, the present embodiment provides a filter tuning apparatus, which includes a metal cavity 10 with an open end, an outer cover plate 20, a resonant column 30 installed in the metal cavity 10, an adjusting cover plate 40, and an adjusting screw 50. The regulation cover plate 40 and the outer cover plate 20 are sequentially mounted to the open end of the metal chamber 10. The resonant disc 31 is formed at one end of the resonant column 30 close to the adjusting cover plate 40, a space is formed between the resonant disc 31 and the adjusting cover plate 40, and the resonant disc 31 and the adjusting cover plate 40 form capacitive coupling. Adjusting screw 50 threaded mounting is used for adjusting the distance between adjusting cover plate 40 and the resonance dish 31 to outer apron 20 to can change the capacitance value between adjusting cover plate 40 and the resonance dish 31, thereby realize resonant frequency's regulation, convenient operation.
The outer diameter of the resonant disk 31 and the thickness of the adjusting cover plate 40 can be set according to the specifications and structure of a specific filter tuning device.
In this embodiment, the way of screwing the adjusting screw 50 to the outer cover plate 20 is: the outer cover plate 20 is provided with a screw hole 21, and the adjustment screw 50 is screw-fitted to the screw hole 21, thereby achieving screw-fitting of the adjustment screw 50 to the outer cover plate 20. The first end of the adjusting screw 50 extends out of the screw hole 21 and is located outside the outer cover plate 20, the second end of the adjusting screw 50 is in contact with the adjusting cover plate 40, the adjusting cover plate 40 can be pressed by screwing the adjusting screw 50 to deform the adjusting cover plate 40, so that the distance between the adjusting cover plate 40 and the resonant disc 31 can be changed, and the distance between the adjusting cover plate 40 and the resonant disc 31 can be adjusted. Through the structure, the adjusting cover plate 40 can be greatly deformed by extruding the adjusting screw rod 50 on the adjusting cover plate 40, so that the distance between the adjusting cover plate 40 and the resonant disc 31 has a larger range, and the adjusting range of the resonant frequency is larger than that of a traditional coaxial cavity filter.
In an alternative, the outer cover plate 20 is provided with a through hole, the outer cover plate 20 is fixedly provided with a fixing nut at a position corresponding to the through hole, and the adjustment screw 50 is threadedly mounted to the fixing nut, thereby achieving the threaded mounting of the adjustment screw 50 to the outer cover plate 20. The first end of the adjusting screw 50 extends out of the fixing nut and is located outside the outer cover plate 20, the second end of the adjusting screw 50 penetrates through the through hole and contacts with the adjusting cover plate 40, the adjusting cover plate 40 can be squeezed by screwing the adjusting screw 50 to deform the adjusting cover plate 40, the distance between the adjusting cover plate 40 and the resonant disc 31 can be changed, and therefore the distance between the adjusting cover plate 40 and the resonant disc 31 can be adjusted.
In other embodiments, the adjusting screw 50 may also be in the form of a self-locking screw, which is threadedly mounted to the screw hole 21 of the outer cover plate 20, and the self-locking property of the self-locking screw is used to extrude the adjusting cover plate 40 to deform the adjusting cover plate 40, so that the distance between the adjusting cover plate 40 and the resonant disk 31 can be changed, and the distance between the adjusting cover plate 40 and the resonant disk 31 can be adjusted.
In this embodiment, the resonant column 30 is a cylindrical structure, and the resonant disk 31 and the resonant column 30 are integrally formed, so that the manufacturing is convenient and the cost is reduced.
As shown in fig. 3, a step 11 is formed at the bottom inside the metal cavity 10, and the resonant column 30 is mounted to the step 11. Specifically, the end of the step 11 is formed with a mounting protrusion 111, the end of the resonant column 30 far away from the adjusting cover plate 40 is formed with a mounting position 32, and the mounting protrusion 111 is mounted in the mounting position 32, so that the resonant column 30 is mounted on the step 11, and the mounting is convenient. The end of the mounting protrusion 111 is pointed to facilitate installation into the mounting location 32. The shape and size of the mounting position 32 are matched with those of the mounting protrusion 111.
The peripheries of the outer cover plate 20 and the adjusting cover plate 40 are mounted to the open end of the metal cavity 10 by fasteners, such as screws, etc., so that the outer cover plate 20 and the adjusting cover plate 40 are fastened to the open end of the metal cavity 10 to prevent deviation during the adjustment of the resonant frequency.
The part of the adjusting cover plate 40 contacting the second end of the adjusting screw 50 is provided with a concave position (not shown in the figure), and the concave position is matched with the second end of the adjusting screw 50, so as to avoid the adjusting cover plate 40 from scratching due to the sliding phenomenon of the adjusting screw 50 in the screwing process, thereby influencing the intermodulation index.
In this embodiment, the adjusting screw 50 is located at the center of the outer cover plate 20, and the adjusting screw 50 directly faces the resonant column 30 to adjust the resonant frequency. The second end of the adjusting screw 50 is hemispherical, so that the adjusting cover plate 40 can be extruded conveniently to deform the adjusting cover plate 40, and the adjusting cover plate 40 can be prevented from being scratched.
The first end of the adjusting screw 50 is sleeved with a fixing nut 60, the fixing nut 60 is in threaded fit with the first end of the adjusting screw 50, and the adjusting screw 50 can be locked to the outer cover plate 20 by screwing the fixing nut 60.
Compared with the traditional cavity filter, the invention has the following advantages:
on the first hand, the coupling area between the resonant disk 31 and the adjusting cover plate 40 is large, and the adjusting cover plate 40 is greatly deformed by the extrusion of the adjusting screw 50 on the adjusting cover plate 40, so that the distance between the adjusting cover plate 40 and the resonant disk 31 has a large range, and the adjusting range of the resonant frequency is larger than that of the traditional coaxial cavity filter; in the second aspect, the adjusting screw 50 is used for adjusting the resonant frequency by extruding the adjusting cover plate 40 to deform the adjusting cover plate 40, the adjusting screw 50 is not required to extend into the through hole in the center of the resonant column 30, the phenomenon that the inner wall of the through hole in the center of the resonant column of the traditional coaxial cavity filter, which is close to the cover plate part and the open end of the adjusting screw, is ignited due to overlarge field intensity is eliminated, and higher power tolerance can be realized; in the third aspect, since the adjusting screw 50 does not need to extend into the through hole in the center of the resonant column 30, the center of the resonant column 30 does not need to be provided with a through hole, thereby effectively avoiding the problem of the discontinuity of the burrs and the impedance at the center of the resonant column 30 caused by the through hole, and further enabling the metal cavity 10 to have high intermodulation.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A filtering tuning device comprises a metal cavity with an opening at one end, an outer cover plate arranged at the opening end of the metal cavity, and a resonant column arranged in the metal cavity, and is characterized by also comprising an adjusting cover plate and an adjusting screw rod; the adjusting cover plate is arranged between the open end of the metal cavity and the outer cover plate; a resonant disc is formed at one end of the resonant column close to the adjusting cover plate, a space is formed between the resonant disc and the adjusting cover plate, and the resonant disc and the adjusting cover plate form capacitive coupling; the adjusting screw is mounted on the outer cover plate in a threaded mode and used for adjusting the distance between the adjusting cover plate and the resonant disc, and therefore the resonant frequency is adjusted.
2. The filter tuning assembly of claim 1, wherein said outer cover plate has a threaded bore, said adjustment screw is threadably mounted to said threaded bore, a first end of said adjustment screw extends from said threaded bore and is located outside of said outer cover plate, a second end of said adjustment screw is in contact with said adjustment cover plate, and said adjustment cover plate is compressible by twisting said adjustment screw to deform said adjustment cover plate, thereby varying the distance between said adjustment cover plate and said resonant disk.
3. The filter tuning device of claim 1, wherein the outer cover plate is provided with a through hole, the outer cover plate is fixedly provided with a fixing nut at a position corresponding to the through hole, the adjusting screw is threadedly mounted to the fixing nut, a first end of the adjusting screw protrudes from the fixing nut and is located outside the outer cover plate, a second end of the adjusting screw passes through the through hole and is in contact with the adjusting cover plate, and the adjusting cover plate is pressed by screwing the adjusting screw to deform the adjusting cover plate, so that the distance between the adjusting cover plate and the resonance plate can be changed.
4. The filter tuning device of claim 1, wherein the resonating post is a cylindrical structure, and the resonating disk and the resonating post are integrally formed.
5. The filter tuning apparatus of claim 1, wherein a bottom portion within the metal cavity is formed with a step to which the resonating post is mounted.
6. The filter tuning device of claim 5, wherein the step is formed with a mounting protrusion at an end thereof, and the resonant post is formed with a mounting location at an end thereof away from the adjustment cover plate, the mounting protrusion being fitted into the mounting location, thereby enabling the resonant post to be mounted to the step.
7. The filter tuning device of claim 1, wherein the outer cover plate and the adjusting cover plate are mounted to the open end of the metal cavity by fasteners.
8. The filtering tuning device of claim 2 or 3, wherein a concave portion is disposed at a contact portion of the adjusting cover plate and the second end of the adjusting screw, and the concave portion is engaged with the second end of the adjusting screw to prevent the adjusting screw from sliding during screwing.
9. The filter tuning device of claim 1, wherein said adjustment screw is aligned with said resonating post, and a second end of said adjustment screw is hemispherical.
10. The filter tuning device of claim 2, further comprising a retaining nut that is fitted over the first end of the adjustment screw, the adjustment screw being lockable to the outer cover plate by screwing the retaining nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011467779.XA CN112615115A (en) | 2020-12-14 | 2020-12-14 | Filtering tuning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011467779.XA CN112615115A (en) | 2020-12-14 | 2020-12-14 | Filtering tuning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112615115A true CN112615115A (en) | 2021-04-06 |
Family
ID=75234062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011467779.XA Pending CN112615115A (en) | 2020-12-14 | 2020-12-14 | Filtering tuning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112615115A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976750A (en) * | 2010-10-29 | 2011-02-16 | 深圳市大富科技股份有限公司 | Cavity filter |
| CN204927468U (en) * | 2015-09-07 | 2015-12-30 | 李登峰 | Double -deck lid board cavity body wave filter |
| CN205069821U (en) * | 2015-09-30 | 2016-03-02 | 李登峰 | Cavity filter |
| CN207765597U (en) * | 2018-02-05 | 2018-08-24 | 捷考奥电子(上海)有限公司 | A kind of cavity body filter |
| US20180358674A1 (en) * | 2015-07-06 | 2018-12-13 | CommScope Italy S.r.I. | Resonant cavity filters with high performance tuning screws |
| CN109314293A (en) * | 2017-01-13 | 2019-02-05 | 华为技术有限公司 | Cavity resonator, filter and communication equipment |
-
2020
- 2020-12-14 CN CN202011467779.XA patent/CN112615115A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976750A (en) * | 2010-10-29 | 2011-02-16 | 深圳市大富科技股份有限公司 | Cavity filter |
| US20180358674A1 (en) * | 2015-07-06 | 2018-12-13 | CommScope Italy S.r.I. | Resonant cavity filters with high performance tuning screws |
| CN204927468U (en) * | 2015-09-07 | 2015-12-30 | 李登峰 | Double -deck lid board cavity body wave filter |
| CN205069821U (en) * | 2015-09-30 | 2016-03-02 | 李登峰 | Cavity filter |
| CN109314293A (en) * | 2017-01-13 | 2019-02-05 | 华为技术有限公司 | Cavity resonator, filter and communication equipment |
| CN207765597U (en) * | 2018-02-05 | 2018-08-24 | 捷考奥电子(上海)有限公司 | A kind of cavity body filter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9397377B2 (en) | Cavity filter | |
| US20160315368A1 (en) | Resonator, Filter, Duplexer, Multiplexer, and Communications Device | |
| CN1252860C (en) | Screw fixing device | |
| US10205210B2 (en) | Cavity filter including ceramic resonator | |
| US9236846B2 (en) | Tunable bandpass filter device and method | |
| KR101720261B1 (en) | Tunable high frequency filter | |
| CN201533009U (en) | Device for loading electric capacity of coaxial resonant cavity | |
| KR20180107631A (en) | Rf filter for improving pimd performance | |
| CN111384537A (en) | Cavity filter and radio frequency communication equipment | |
| CN106159395B (en) | Cavity filter, duplexer and radio remote unit | |
| CN110729539A (en) | Cavity filter | |
| US20120326811A1 (en) | Temperature-Independent Dielectric Resonator | |
| CN112615115A (en) | Filtering tuning device | |
| CA2948038A1 (en) | Transverse magnetic (tm) mode dielectric filter | |
| KR200404256Y1 (en) | Notch Tunable Radio Frequency Filter | |
| WO2016165384A1 (en) | Resonator and cavity filter | |
| KR102172764B1 (en) | Cavity filter having structure for self-locking and method for producing the same | |
| KR100761801B1 (en) | Radio frequency filter and tuning method thereof | |
| KR200404258Y1 (en) | Coupling Boss Coaxial Filter | |
| US4775847A (en) | Tunable resonant cavity filter structure with enhanced ground return | |
| KR101605863B1 (en) | Dieletric Resonator Filter | |
| KR200403175Y1 (en) | Uneven Shape Cavity Filter | |
| US20200235457A1 (en) | Filter and communication system including the filter | |
| CN110534857B (en) | Adjustable capacitive coupling structure | |
| CN106602192A (en) | Adjustable capacitive cross coupling structure and cavity filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210406 |