CN103094649A - Cavity filter - Google Patents
Cavity filter Download PDFInfo
- Publication number
- CN103094649A CN103094649A CN2013100282713A CN201310028271A CN103094649A CN 103094649 A CN103094649 A CN 103094649A CN 2013100282713 A CN2013100282713 A CN 2013100282713A CN 201310028271 A CN201310028271 A CN 201310028271A CN 103094649 A CN103094649 A CN 103094649A
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- cavity
- resonant rod
- filter
- boss
- body filter
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
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Abstract
The invention discloses a cavity filter, and relates to the communication technology to achieve the goal of enlarging the power capacity of the filter and the adjustment range of the frequency under the condition that the cavity depth of the filter is small. The cavity filter comprises a cavity with an upper end open, a cover plate, a tuning screw and a resonant rod, wherein the resonant rod is fixed on a baseplate of the cavity and is held inside the cavity, the cover plate is fixedly installed at the opening portion of the cavity and the cover plate is provided with a screw hole, the tuning screw matches with the screw hole, and one end of the tuning screw penetrates the cover plate and stretches into the cavity. A through hole is formed in the middle of the resonant rod, the tuning screw stretches into the through hole, and the outer wall of the resonant rod and the baseplate of the cavity are fixedly connected. The cavity filter enlarges the power capacity of the filter and the adjustment range of the frequency under the condition that the cavity depth of the filter is small.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of cavity body filter.
Background technology
Filter is a kind of device that electromagnetic wave signal is had the processing effect, and its Main Function is: allow useful signal zero-decrement passing through as far as possible, the reflection large as far as possible to unwanted signal.At present, generally adopt cavity body filter to carry out the frequency selection to transmitting or receiving signal in base station system.Cavity body filter generally includes cavity, resonant rod, tuning screw and cover plate.Cavity is provided with a plurality of cavitys, and resonant rod is combined with cavity, and is contained in cavity, and cover plate is arranged on the opening part of cavity, and cover plate is provided with a plurality of screws, and the position of screw is corresponding with resonant rod.Tuning screw coordinates with screw, and the one end stretches in resonant rod after passing cover plate.The length that stretches into resonant rod under certain power by regulating tuning screw is adjusted the frequency of filter.Along with the fast development of microwave wireless communication, wireless telecommunications universal, operator is more and more stronger to miniaturization, the lightweight demand of cavity body filter.
In prior art, in order to reduce the volume of cavity body filter, usually the chamber of the cavity of filter is done deeply littlely, but deeply do littlely along with the chamber of filter, the power capacity of filter and the adjustable range of frequency also can diminish thereupon.Therefore, in the situation that filter cavity is done deeply is little, how improves the power capacity of filter and the adjustable range of frequency and just become the primary technical barrier that solves in cavity body filter field.
Summary of the invention
The invention provides a kind of cavity body filter, in the situation that filter cavity is done littlely deeply, improve the purpose of the adjustable range of the power capacity of filter and frequency to reach.
For achieving the above object, the present invention adopts following technical scheme:
On the one hand, a kind of cavity body filter is provided, the cavity, cover plate, tuning screw and the resonant rod that comprise upper end open, described resonant rod is fixed on the base plate of described cavity and is contained in described cavity, described cover plate is fixedly mounted on the opening part of described cavity, and described cover plate is provided with screw, described tuning screw coordinates with described screw and an end passes described cover plate and stretches in described cavity, wherein, be provided with through hole in the middle of described resonant rod, described tuning screw stretches in described through hole, and the outer wall of described resonant rod is fixedly connected with the base plate of described cavity.
In the possible implementation of the first, on the base plate of described cavity, dark direction is provided with the boss that cross section is annulus along the chamber, and the outer wall of described resonant rod and the inwall of described boss are connected.
In conjunction with the possible implementation of the first, in the possible implementation of the second, the inwall of described boss is provided with internal thread, and the lower end outer wall of described resonant rod is provided with the external screw thread with described screw-internal thread fit.
In the third possible implementation, described through hole is along the hexagon that is shaped as on the top of the dark direction in chamber.
In the 4th kind of possible implementation, described resonant rod is provided with the installing hole of at least two symmetries along the upper surface of the dark direction in chamber.
In conjunction with the possible implementation of the first, in the 5th kind of possible implementation, the outer wall of described resonant rod is connected with the inwall interference fit of described boss.
In the 6th kind of possible implementation, described resonant rod has extended radially outward step near the position that is connected with described boss, and described step is overlapped on the top plan of described boss.
In the 7th kind of possible implementation, described resonant rod radially outwards is provided with flange.
According to embodiments of the invention, because the centre of resonant rod is provided with through hole, tuning screw stretches in through hole and the outer wall of resonant rod is fixedly connected with the base plate of cavity, therefore tuning screw can extend into position near the base plate of cavity on the dark direction in chamber, through hole in resonant rod can be fully utilized to realize the increase of tuning screw adjusting surplus like this, thereby reaches the purpose of the adjustable range that improves filter frequencies.So the cavity body filter in the present invention, in the situation that the purpose that the little adjusting surplus that still can pass through the raising tuning screw realizes the adjustable range of raising filter power capacity and frequency is done in the chamber deeply.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, during the below will describe embodiment, the accompanying drawing of required use is done to introduce simply, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The cutaway view of the structure of the cavity body filter that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is partial schematic diagram shown in Figure 1;
Fig. 3 is the cutaway view of resonant rod shown in Figure 1;
The perspective view of the cavity body filter that Fig. 4 provides for the embodiment of the present invention;
Another perspective view of the cavity body filter that Fig. 5 provides for the embodiment of the present invention;
The cutaway view of another structure of the cavity body filter that Fig. 6 provides for the embodiment of the present invention;
Fig. 7 is the cutaway view of resonant rod shown in Figure 6;
Fig. 8 is partial schematic diagram shown in Figure 6.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work belongs to the scope of protection of the invention.
as Fig. 1 and shown in Figure 6, specific embodiment for cavity body filter provided by the invention, this cavity body filter is single cavity filter, the cavity 11 that comprises upper end open, cover plate 12, tuning screw 13 and resonant rod 14, resonant rod 14 is fixed on the base plate 16 of cavity 11 and is contained in cavity 11, cover plate 12 can connect or the mode of welding is fixedly mounted on the opening part of cavity 11 by screw, and cover plate 12 is provided with screw, tuning screw 13 coordinates with screw and an end passes cover plate 12 and stretches in cavity 11, wherein, be provided with through hole 15 in the middle of resonant rod 14, tuning screw 13 stretches in through hole 15, and the outer wall of resonant rod 14 is fixedly connected with the base plate 16 of cavity 11.
The cavity body filter that the embodiment of the present invention provides, because the centre of resonant rod 14 is provided with through hole 15, tuning screw 13 stretches in through hole 15 and the outer wall of resonant rod 14 is fixedly connected with the base plate 16 of cavity 11, therefore tuning screw 13 can extend into position near the base plate 16 of cavity 11 on the dark direction in chamber, through hole 15 in resonant rod 14 can be fully utilized to realize the increase of tuning screw 13 adjusting surpluses like this, thereby reaches the purpose of the adjustable range that improves filter frequencies.So the cavity body filter in the present invention, in the situation that the purpose that the little adjusting surplus that still can pass through the raising tuning screw realizes the adjustable range of raising filter power capacity and frequency is done in the chamber deeply.
As Fig. 1, Fig. 2, Fig. 6 and shown in Figure 8, as the further improvement of above-described embodiment, on the base plate 16 of cavity 11, dark direction is provided with the boss 17 that cross section is annulus along the chamber, and the inwall of the outer wall of resonant rod 14 and boss 17 is connected.This connected mode is simple and easy to realize relatively, can reduce the thickness of well floor to a certain extent simultaneously, realizes the lightweight of cavity body filter.Wherein boss 17 can with cavity 11 integrally casting moulding, also can weld or other connected mode is fixed together the base plate 16 of cavity 11 and boss 17 by the later stage.
In above-described embodiment, resonant rod 14 and the mode of being connected of boss 17 can adopt and be threaded (referring to Fig. 1) or interference fit is connected (referring to Fig. 6).When employing is threaded, as shown in Figures 2 and 3, can be on the inwall of boss 17 machining internal thread 22, the external screw thread 31 that processing coordinates with internal thread 22 on the outer wall of the lower end of resonant rod 14.The part with external screw thread 31 of resonant rod 14 need to be screwed in the endoporus 21 of boss 17 during installation, make it to be connected with the internal thread 22 of boss 17.In order to facilitate the installation of resonant rod 14, as shown in Figure 4, we can be designed to hexagon with the shape on the top of the through hole 15 in resonant rod 14, we can be that hexagonal erecting tools 41 comes fixing resonance bar 14 by cross section like this, an end with erecting tools 41 during concrete the installation inserts in the hexagonal hole of resonant rod 14, and the other end that then rotates erecting tools 41 screws in resonant rod 14 in the endoporus with internal thread 22 21 of boss 17.Also can be as shown in Figure 5, the installing hole 512 of at least two symmetries is set on the upper surface of resonant rod 14, so just can be by erecting tools 51 fixing resonance bars 14, in two shanks, 511 insertion installing holes 512 with erecting tools 51 lower ends during installation, the installation of resonant rod 14 is realized on the top of manual rotation erecting tools 51.
When employing interference fit as shown in Figure 6 connects, can design the external diameter of resonant rod 14 bottoms more slightly larger than the external diameter of boss 17, when mounted, be pressed in the endoporus 21 of boss 17 by crimping or the mode that the presses lower end with resonant rod 14, realize that resonant rod 14 is connected with the interference fit of boss 17.
As Fig. 3 and shown in Figure 7, when fixing resonance bar 14, in order to realize the mounting limit of resonant rod 14 and boss 17, can extend radially outward near the position that is connected with boss 17 at resonant rod 14 step 32 is set, step 332 is overlapped on the top plan of boss 17.Like this when resonant rod 14 screws in or be pressed in the endoporus 21 of boss 17, proof is in place when step 32 is overlapped on the top plan of boss 17, avoids installing shallowly causing not firmly or the dark accuracy that affects frequency being installed.Wherein step 32 is preferred and resonant rod 14 is one-body molded.
Due to filter cavity deeply do little after, frequency can improve thereupon, for frequency being dropped to needed frequency range, as Fig. 3 and shown in Figure 7, at resonant rod 14, flange 18 outwards is set radially.Flange 18 is preferred and resonant rod 14 is one-body molded.
As Fig. 1 and shown in Figure 6, be connected with nut 19 on tuning screw 13, when regulating tuning screw 13, at first nut 19 is unscrewed like this, screw nut 19 when being adjusted to the position that needs adjusting screw(rod) 13 and cover plate 12 are fixed together.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement are within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (8)
1. cavity body filter, the cavity, cover plate, tuning screw and the resonant rod that comprise upper end open, described resonant rod is fixed on the base plate of described cavity and is contained in described cavity, described cover plate is fixedly mounted on the opening part of described cavity, and described cover plate is provided with screw, described tuning screw coordinates with described screw and an end passes described cover plate and stretches in described cavity, it is characterized in that, be provided with through hole in the middle of described resonant rod, described tuning screw stretches in described through hole, and the outer wall of described resonant rod is fixedly connected with the base plate of described cavity.
2. cavity body filter according to claim 1, is characterized in that, on the base plate of described cavity, dark direction is provided with the boss that cross section is annulus along the chamber, and the outer wall of described resonant rod and the inwall of described boss are connected.
3. cavity body filter according to claim 2, is characterized in that, the inwall of described boss is provided with internal thread, and the lower end outer wall of described resonant rod is provided with the external screw thread with described screw-internal thread fit.
4. cavity body filter according to claim 3, is characterized in that, described through hole is along the hexagon that is shaped as on the top of the dark direction in chamber.
5. cavity body filter according to claim 3, is characterized in that, described resonant rod is provided with the installing hole of at least two symmetries along the upper surface of the dark direction in chamber.
6. cavity body filter according to claim 2, is characterized in that, described resonant rod is connected with described boss interference fit.
7. the described cavity body filter of any one according to claim 3-6, is characterized in that, described resonant rod has extended radially outward step near the position that is connected with described boss, and described step is overlapped on the top plan of described boss.
8. cavity body filter according to claim 1, is characterized in that, described resonant rod radially outwards is provided with flange.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310028271.3A CN103094649B (en) | 2013-01-25 | 2013-01-25 | Cavity body filter |
| PCT/CN2014/071469 WO2014114265A1 (en) | 2013-01-25 | 2014-01-26 | Cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310028271.3A CN103094649B (en) | 2013-01-25 | 2013-01-25 | Cavity body filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103094649A true CN103094649A (en) | 2013-05-08 |
| CN103094649B CN103094649B (en) | 2016-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310028271.3A Active CN103094649B (en) | 2013-01-25 | 2013-01-25 | Cavity body filter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103094649B (en) |
| WO (1) | WO2014114265A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014114265A1 (en) * | 2013-01-25 | 2014-07-31 | 华为技术有限公司 | Cavity filter |
| WO2015018051A1 (en) * | 2013-08-09 | 2015-02-12 | 华为技术有限公司 | Filter tuning device and filter |
| WO2015074616A1 (en) * | 2013-11-25 | 2015-05-28 | 华为技术有限公司 | Filter |
| CN112952324A (en) * | 2021-04-02 | 2021-06-11 | 京信射频技术(广州)有限公司 | Filter, resonator and communication device |
| CN113236650A (en) * | 2021-04-20 | 2021-08-10 | 武汉凡谷电子技术股份有限公司 | Locking type filter tuning screw device and filter |
| CN113285189A (en) * | 2021-04-20 | 2021-08-20 | 武汉德威斯电子技术有限公司 | Totally enclosed wave filter and communication equipment for aerospace |
| CN113851800A (en) * | 2021-08-13 | 2021-12-28 | 武汉凡谷电子技术股份有限公司 | Filter and manufacturing method thereof |
| IT202100012983A1 (en) * | 2021-05-19 | 2022-11-19 | Commscope Italy Srl | FIXING ELEMENT FOR THE RESONATOR OF A RADIOFREQUENCY FILTER |
| CN116112514A (en) * | 2021-11-11 | 2023-05-12 | 广州汽车集团股份有限公司 | Vehicle remote diagnosis system and method |
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| CN101841075A (en) * | 2009-10-13 | 2010-09-22 | 安徽省大富机电技术有限公司 | Resonant tube |
| CN102255124A (en) * | 2011-04-22 | 2011-11-23 | 深圳市大富科技股份有限公司 | Cavity filter, communication equipment, communication equipment cover plate component and tuning structure |
| CN102354780A (en) * | 2011-07-22 | 2012-02-15 | 深圳市大富科技股份有限公司 | Cavity filter and communication device |
| CN202564517U (en) * | 2012-04-28 | 2012-11-28 | 成都泰格微波技术股份有限公司 | Novel low frequency cavity filter |
| CN203119067U (en) * | 2013-01-25 | 2013-08-07 | 华为技术有限公司 | Cavity filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101546853B (en) * | 2009-04-29 | 2012-12-19 | 上海华为技术有限公司 | Die-casting diplexer and die-casting method |
| CN202167594U (en) * | 2011-07-01 | 2012-03-14 | 深圳市大富科技股份有限公司 | Dielectric filter |
| CN103094649B (en) * | 2013-01-25 | 2016-12-28 | 华为技术有限公司 | Cavity body filter |
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2013
- 2013-01-25 CN CN201310028271.3A patent/CN103094649B/en active Active
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2014
- 2014-01-26 WO PCT/CN2014/071469 patent/WO2014114265A1/en active Application Filing
Patent Citations (5)
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| CN101841075A (en) * | 2009-10-13 | 2010-09-22 | 安徽省大富机电技术有限公司 | Resonant tube |
| CN102255124A (en) * | 2011-04-22 | 2011-11-23 | 深圳市大富科技股份有限公司 | Cavity filter, communication equipment, communication equipment cover plate component and tuning structure |
| CN102354780A (en) * | 2011-07-22 | 2012-02-15 | 深圳市大富科技股份有限公司 | Cavity filter and communication device |
| CN202564517U (en) * | 2012-04-28 | 2012-11-28 | 成都泰格微波技术股份有限公司 | Novel low frequency cavity filter |
| CN203119067U (en) * | 2013-01-25 | 2013-08-07 | 华为技术有限公司 | Cavity filter |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014114265A1 (en) * | 2013-01-25 | 2014-07-31 | 华为技术有限公司 | Cavity filter |
| WO2015018051A1 (en) * | 2013-08-09 | 2015-02-12 | 华为技术有限公司 | Filter tuning device and filter |
| WO2015074616A1 (en) * | 2013-11-25 | 2015-05-28 | 华为技术有限公司 | Filter |
| CN112952324A (en) * | 2021-04-02 | 2021-06-11 | 京信射频技术(广州)有限公司 | Filter, resonator and communication device |
| CN113236650A (en) * | 2021-04-20 | 2021-08-10 | 武汉凡谷电子技术股份有限公司 | Locking type filter tuning screw device and filter |
| CN113285189A (en) * | 2021-04-20 | 2021-08-20 | 武汉德威斯电子技术有限公司 | Totally enclosed wave filter and communication equipment for aerospace |
| IT202100012983A1 (en) * | 2021-05-19 | 2022-11-19 | Commscope Italy Srl | FIXING ELEMENT FOR THE RESONATOR OF A RADIOFREQUENCY FILTER |
| US11881609B2 (en) | 2021-05-19 | 2024-01-23 | Commscope Italy S.R.L. | Radio frequency filter comprising a screw mounted resonator, where the screw includes recesses on the perimeter thereof |
| CN113851800A (en) * | 2021-08-13 | 2021-12-28 | 武汉凡谷电子技术股份有限公司 | Filter and manufacturing method thereof |
| CN113851800B (en) * | 2021-08-13 | 2022-12-13 | 武汉凡谷电子技术股份有限公司 | Filter and manufacturing method thereof |
| CN116112514A (en) * | 2021-11-11 | 2023-05-12 | 广州汽车集团股份有限公司 | Vehicle remote diagnosis system and method |
| CN116112514B (en) * | 2021-11-11 | 2024-08-02 | 广州汽车集团股份有限公司 | Vehicle remote diagnosis system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103094649B (en) | 2016-12-28 |
| WO2014114265A1 (en) | 2014-07-31 |
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