CN101764277A - Filter of cavity and resonance tube thereof - Google Patents
Filter of cavity and resonance tube thereof Download PDFInfo
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- CN101764277A CN101764277A CN 201010122536 CN201010122536A CN101764277A CN 101764277 A CN101764277 A CN 101764277A CN 201010122536 CN201010122536 CN 201010122536 CN 201010122536 A CN201010122536 A CN 201010122536A CN 101764277 A CN101764277 A CN 101764277A
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- resonatron
- cavity
- erecting bed
- screw
- body filter
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Abstract
The invention discloses a filter of a cavity and a resonance tube thereof. In the embodiment of the invention, the resonance tube is designed into a flat bottom structure and arranged in the cavity through a mounting platform, thereby preventing the bottom deformation of the resonance tube when the resonance tube is fixed by bolts in the prior art, so that the resonance tube and the cavity are contacted reliably, the performance index is more stable, the manufacturing technology of the resonance tube is simpler, and the consistency is better.
Description
Technical field
The present invention relates to the wave filter technology field, be specifically related to cavity body filter and resonatron.
Background technology
Filter is widely used in the communications field as a kind of frequency selection device, especially field of radio frequency communication.In the base station, filter is used to select signal of communication, clutter or interference signal that the filtering communication signal frequency is outer.
At present, in mobile communication system, generally use cavity body filter to come that antenna emission and the signal that receives are carried out frequency and select.Cavity body filter generally includes cavity and resonatron, and cavity is provided with a plurality of cavitys, contains a resonatron in each cavity.In the cavity body filter large-scale production, need to use large batch of resonatron.As shown in Figure 1, the bottom end face of traditional resonatron all is the structure that caves inward, and by screw lock, the resonatron of sunken inside structure can reduce the lifting surface area between resonatron and the cavity between resonatron and the cavity, increase pressure, make that contact is more reliable between resonatron and the cavity.
But, in research and practice process to prior art, the present inventor finds, the resonatron of sunken inside and cavity are fixedly the time, owing to have the space between resonatron and the cavity, in the time of screw lock, resonatron bottom surface stress deformation, cause whole resonatron generation deformation, have influence on the index of cavity body filter, resonatron bottom surface distortion also may change lifting surface area and the loading angle between resonatron and the cavity, makes loose contact between resonatron and the cavity, has influence on the index of cavity body filter again.
Summary of the invention
The embodiment of the invention provides a kind of cavity body filter, can be so that contact be more reliable between resonatron and the cavity, and the manufacture craft of resonatron is simpler, and the index of cavity body filter is more stable.
A kind of cavity body filter that the embodiment of the invention provides comprises: cavity and resonatron, and there is through hole described resonatron bottom for flat-bottom structure and bottom; Being provided with on the described cavity on erecting bed, the erecting bed has screw, and described resonatron bottom is provided with screw, and through hole and the cooperation of described screw that described screw passes bottom the resonatron are fixed in described resonatron on the erecting bed.
Preferably, be formed in one structure or described erecting bed of described erecting bed and cavity is riveted on the described inside cavity bottom surface by the riveted joint mode.
Preferably, the aperture of described resonatron bottom through-hole is more bigger than the Major Diam of described screw.
Preferably, the difference of the Major Diam of the size in the aperture of described resonatron bottom through-hole and described screw belongs to the closed interval of 0.05mm～0.3mm.
Preferably, described erecting bed is cylindrical, and described erecting bed end face diameter is less than the body bottom surface diameter of resonatron.
Preferably, the stepped hole that caves on described erecting bed and the resonatron bottom contact-making surface to reduce the contact area of erecting bed and resonatron bottom, is provided with described screw in the described stepped hole.
Preferably, in the top of described screw along chamfering, to reduce the contact area of erecting bed and resonatron bottom.
Preferably, be provided with groove structure between described erecting bed outer wall and the screw inwall, to reduce the contact area of erecting bed and resonatron bottom.
A kind of resonatron that the embodiment of the invention provides comprises: the body and the pipe end, and describedly, pipe is provided with through hole at the bottom of the described pipe for being flat-bottom structure the end, and be used for screw and pass and cooperate fixedly resonatron with cavity.
Preferably, described body top is provided with ring flange, and described ring flange and described body are one-body molded.
Cavity body filter that the embodiment of the invention provides and resonatron, by resonatron is made into flat-bottom structure, and be installed in the cavity by erecting bed, in the time of can avoiding passing through the screw resonatron in the prior art, the deformation that the resonatron bottom that causes takes place, make reliably to contact between resonatron and the cavity that performance index are stable more and manufacturing process resonatron is more simple, consistency is better.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The internal structure schematic diagram of cavity body filter in Fig. 1 prior art;
Fig. 2 is the internal structure schematic diagram of the embodiment of the invention one cavity body filter;
Fig. 3 (a)～Fig. 3 (c) is the structural representation of three kinds of erecting beds in the embodiment of the invention;
Fig. 4 is the structural representation of the embodiment of the invention two resonatrons.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Embodiment one, a kind of cavity body filter, its structural representation comprises as shown in Figure 2:
In the present embodiment, can be formed in one structure or described erecting bed of described erecting bed and cavity is riveted on the described inside cavity bottom surface by the riveted joint mode, be appreciated that, the realization of described erecting bed and cavity forms can also other multiple conventional implementations, and concrete implementation is not construed as limiting the invention.
In the present embodiment implementation procedure, the aperture design of resonatron 300 bottom through-holes 310 can be more bigger than the Major Diam of described screw 320.For example: the size in the aperture 310 of resonatron bottom through-hole can be exceeded partial design with the Major Diam of described screw 320 in greater than the scope of 0.05mm less than 0.3mm.
The shape of erecting bed 210 can have multiple, because resonatron 300 generally is cylindrical shape, so described erecting bed is for can adopt into cylindrical or truncated cone-shaped, described erecting bed end face diameter can be less than the body bottom surface diameter of resonatron to reduce the contact area of erecting bed and resonatron, increase pressure.
In order to increase the pressure between the erecting bed of resonatron bottom surface; make resonatron can better fully contact with erecting bed; can adopt narrow edge joint to touch mode; concrete the present invention can take following three kinds of mode design and installation platforms; be appreciated that; below three kinds of modes only be implementation preferably of the present invention, those skilled in the art do not pay other conventional distortion that creative work obtains on the basis of following three kinds of modes, all belong to protection scope of the present invention.
Mode one, shown in Fig. 3 (a), the stepped hole 212 that caves on described erecting bed 210 and resonatron bottom contact-making surface to reduce the contact area of erecting bed and resonatron bottom, is provided with described screw 211 in the described stepped hole.After being appreciated that the stepped hole that caves on described erecting bed 210 and the resonatron bottom contact-making surface, the intensity of pressure requirement and the narrow edge joint that can satisfy between resonatron and the erecting bed touch requirement.
Mode two, shown in Fig. 3 (b), in the top of described screw 211 along chamfering, to reduce the contact area of erecting bed and resonatron bottom.
Mode three, shown in Fig. 3 (c), between described erecting bed 210 outer walls and screw 211 inwalls groove structure 213 is set, to reduce the contact area of erecting bed and resonatron bottom.
By above three kinds of modes, realized between stretching resonant rod and the cavity that narrow edge joint touches design, the narrow edge joint that has satisfied between resonatron and the cavity touches requirement.
Existing stretching resonatron structure is difficult to guarantee and the cavity excellent contact when assembling, has reduced the insertion loss objective and the intermodulation index of product; After carrying out screw lock, the stretching resonatron can produce certain deformation, cause the product frequency change, be difficult to reach the product index of expection, and cavity body filter that the embodiment of the invention provides and resonatron, by resonatron is made into flat-bottom structure, and be installed in the cavity by erecting bed, in the time of can avoiding passing through the screw resonatron in the prior art, the deformation that the resonatron bottom that causes takes place, make reliably to contact between resonatron and the cavity that performance index are stable more and manufacturing process resonatron is more simple, consistency is better.
Embodiment two, a kind of resonatron, structural representation comprises as shown in Figure 4: the body 410 and the pipe end 420,, described 420 are provided with through hole 421 at the bottom of the described pipe for the pipe end 420 is a flat-bottom structure, are used for screw and pass and cooperate fixedly resonatron with cavity.
Be appreciated that described body top is provided with ring flange 430, described ring flange 430 is one-body molded with the described body 410 and the pipe end 420.
As everyone knows, resonatron not only requires high to processing technology, and its assembling and positioning is required also is very high, if the resonatron location is bad when assembling, will make that product index is difficult to guarantee, brings huge difficulty for debugging work; And the bottom end face structure that caves inward has not only improved the processing technology difficulty of stretching resonatron, and more makes the electrical index of product become to be difficult to guarantee.
More than cavity body filter and resonatron that the embodiment of the invention provided are described in detail, wherein:
Cavity body filter that the embodiment of the invention provides and resonatron, by resonatron is made into flat-bottom structure, and be installed in the cavity by erecting bed, in the time of can avoiding passing through the screw resonatron in the prior art, the resonatron deformation of bottom and the frequency error that cause, make reliably to contact between resonatron and the cavity that performance index are more stable.
Used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. cavity body filter comprises: cavity and resonatron is characterized in that there is through hole described resonatron bottom for flat-bottom structure and bottom; Being provided with on the described cavity on erecting bed, the erecting bed has screw, and described resonatron bottom is provided with screw, and through hole and the cooperation of described screw that described screw passes bottom the resonatron are fixed in described resonatron on the erecting bed.
2. cavity body filter as claimed in claim 1 is characterized in that, be formed in one structure or described erecting bed of described erecting bed and cavity is riveted on the described inside cavity bottom surface by the riveted joint mode.
3. cavity body filter as claimed in claim 1 is characterized in that the aperture of described resonatron bottom through-hole is more bigger than the Major Diam of described screw.
4. cavity body filter as claimed in claim 3 is characterized in that, the difference of the size in the aperture of described resonatron bottom through-hole and the Major Diam of described screw belongs to the closed interval of 0.05mm～0.3mm.
5. cavity body filter as claimed in claim 1 is characterized in that, described erecting bed is cylindrical, and described erecting bed end face diameter is less than the body bottom surface diameter of resonatron.
6. as any described cavity body filter of claim 1 to 5, it is characterized in that the stepped hole that caves on described erecting bed and the resonatron bottom contact-making surface to reduce the contact area of erecting bed and resonatron bottom, is provided with described screw in the described stepped hole.
7. as any described cavity body filter of claim 1 to 5, it is characterized in that, in the top of described screw along chamfering, to reduce the contact area of erecting bed and resonatron bottom.
8. as any described cavity body filter of claim 1 to 5, it is characterized in that, be provided with groove structure between described erecting bed outer wall and the screw inwall, to reduce the contact area of erecting bed and resonatron bottom.
9. a resonatron is characterized in that, comprising: the body and the pipe end are flat-bottom structure at the bottom of the described pipe, are provided with through hole at the bottom of the described pipe, are used for screw and pass and cooperate fixedly resonatron with cavity.
10. resonatron as claimed in claim 8 is characterized in that, described body top is provided with ring flange, and described ring flange and described body and the pipe end are one-body molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010122536 CN101764277B (en) | 2010-03-12 | 2010-03-12 | Filter of cavity and resonance tube thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010122536 CN101764277B (en) | 2010-03-12 | 2010-03-12 | Filter of cavity and resonance tube thereof |
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| Publication Number | Publication Date |
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| CN101764277A true CN101764277A (en) | 2010-06-30 |
| CN101764277B CN101764277B (en) | 2012-10-17 |
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| CN 201010122536 Active CN101764277B (en) | 2010-03-12 | 2010-03-12 | Filter of cavity and resonance tube thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950830A (en) * | 2010-09-16 | 2011-01-19 | 深圳市大富科技股份有限公司 | Cavity filter and manufacture method thereof |
| CN101976750A (en) * | 2010-10-29 | 2011-02-16 | 深圳市大富科技股份有限公司 | Cavity filter |
| CN102832429A (en) * | 2012-09-13 | 2012-12-19 | 深圳市大富科技股份有限公司 | Coaxial cavity filter |
| WO2014047820A1 (en) * | 2012-09-26 | 2014-04-03 | 华为技术有限公司 | Cavity filter |
| WO2015074616A1 (en) * | 2013-11-25 | 2015-05-28 | 华为技术有限公司 | Filter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645525A (en) * | 2009-08-07 | 2010-02-10 | 大富（深圳）科技有限公司 | Cavity body filter |
| CN101656341A (en) * | 2009-10-10 | 2010-02-24 | 大富（深圳）科技有限公司 | Resonance tube |
| CN201417811Y (en) * | 2009-06-10 | 2010-03-03 | 大富（深圳）科技有限公司 | Resonating tube and cavity filter with the resonating tube |
| CN201421872Y (en) * | 2009-04-23 | 2010-03-10 | 鸿富锦精密工业（深圳）有限公司 | Hollow cavity filter |
-
2010
- 2010-03-12 CN CN 201010122536 patent/CN101764277B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201421872Y (en) * | 2009-04-23 | 2010-03-10 | 鸿富锦精密工业（深圳）有限公司 | Hollow cavity filter |
| CN201417811Y (en) * | 2009-06-10 | 2010-03-03 | 大富（深圳）科技有限公司 | Resonating tube and cavity filter with the resonating tube |
| CN101645525A (en) * | 2009-08-07 | 2010-02-10 | 大富（深圳）科技有限公司 | Cavity body filter |
| CN101656341A (en) * | 2009-10-10 | 2010-02-24 | 大富（深圳）科技有限公司 | Resonance tube |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950830A (en) * | 2010-09-16 | 2011-01-19 | 深圳市大富科技股份有限公司 | Cavity filter and manufacture method thereof |
| CN101950830B (en) * | 2010-09-16 | 2014-12-24 | 深圳市大富科技股份有限公司 | Cavity filter and manufacture method thereof |
| CN101976750A (en) * | 2010-10-29 | 2011-02-16 | 深圳市大富科技股份有限公司 | Cavity filter |
| CN102832429A (en) * | 2012-09-13 | 2012-12-19 | 深圳市大富科技股份有限公司 | Coaxial cavity filter |
| CN102832429B (en) * | 2012-09-13 | 2015-01-14 | 深圳市大富科技股份有限公司 | Coaxial cavity filter |
| WO2014047820A1 (en) * | 2012-09-26 | 2014-04-03 | 华为技术有限公司 | Cavity filter |
| WO2015074616A1 (en) * | 2013-11-25 | 2015-05-28 | 华为技术有限公司 | Filter |
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| Publication number | Publication date |
|---|---|
| CN101764277B (en) | 2012-10-17 |
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Address after: 518104, Guangdong, Shenzhen province Baoan District manhole Street oyster road manhole Industrial Company Third Industrial Zone A1, A2, A3 101 and 2 layers, A4 Applicant after: Shenzhen Tat Fook Technology Co., Ltd. Address before: 518108 Bao'an District, Shenzhen City, Guangdong Province, Shiyan Town, love group with the rich industrial area A \ B Dong Applicant before: Shenzhen Tat Fook Technology Co., Ltd. |
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Address after: 233000 building 4, national financial incubation Industrial Park, 17 Yannan Road, high tech Zone, Bengbu City, Anhui Province Patentee after: Dafu Technology (Anhui) Co., Ltd Address before: 518104, Guangdong, Shenzhen province Baoan District manhole Street oyster road manhole Industrial Company Third Industrial Zone A1, A2, A3 101 and 2 layers, A4 Patentee before: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd. |