CN101546857B - A medium resonator and its assembling method, medium filter - Google Patents
A medium resonator and its assembling method, medium filter Download PDFInfo
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- CN101546857B CN101546857B CN2009101355471A CN200910135547A CN101546857B CN 101546857 B CN101546857 B CN 101546857B CN 2009101355471 A CN2009101355471 A CN 2009101355471A CN 200910135547 A CN200910135547 A CN 200910135547A CN 101546857 B CN101546857 B CN 101546857B
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Abstract
The embodiment of the invention provide a medium resonator and its assembling method and medium filter. The medium resonator comprises a medium resonance column and metal cavity; The medium resonance column is positioned in the metal cavity; bottom of the medium resonance column contacts bottom of metal cavity; The medium resonance column also comprises: a cover board and conductive elastic body; the cover board is positioned at upper surface of the metal cavity for sealing the metal cavity; the conductive elastic body is positioned between the cover board and the medium resonance column for facilitating contact of the cover board and the medium resonance column. The medium filter of the embodiment guarantees good contact of cover board and medium resonance column by resiliency of pressurized conductive elastic body, and incontinuous transmission of electric current, thereby effectively preventing electric current leakage, promoting filter performance of medium filter, and reducing size of whole size of medium resonator due to sealed contact.
Description
Technical field
The present invention relates to network communications technology field, particularly a kind of dielectric resonator and assembly method and dielectric filter.
Background technology
When in high dielectric constant material, propagating, electromagnetic wavelength can shorten, and therefore adopts dielectric filter to do the volume of filter little.Filter is an important components very in the product of base station, so dielectric filter is significant to the miniaturization of base station product.
Referring to Fig. 1, this figure is the sketch map of TM (transverse magnetic, horizontal magnetic) mould dielectric filter, mainly is made up of dielectric resonance post and metallic cavity.
According to electromagnetic principle, resonator is when operate as normal, and there is CURRENT DISTRIBUTION dielectric resonance post 101 upper and lower end faces and metallic cavity 102 junctions.If it is bad that the upper and lower end face of dielectric resonance post 101 contacts with metallic cavity 102, can cause leakage of current on the one hand, increased the contact resistance of dielectric resonance post 101 upper and lower end faces and metallic cavity 102 on the other hand, increased loss.Therefore, the medium of resonator contacts well very importantly in the TM mould dielectric filter with metallic cavity 102 upper and lower surfaces, otherwise can cause current loss to increase, thereby influence the performance of filter.
Existing a kind of dielectric filter is referring to Fig. 2.Wherein, large cover 203 is positioned at the upper surface of dielectric resonance post, is used for the upper surface of closed dielectric and metallic cavity.Flexible deformed region 202 on the large cover 203 contacts with the upper surface of dielectric resonance post.When expanding or shrink, deformation takes place in the strain zone, to keep the sealing contact.And, on large cover 203, also be provided with minor flaps 201, be used for the integral sealing dielectric filter.
But strain zone 202 only is linear the contact with dielectric resonance post upper surface.The upper surface of whole dielectric resonance post does not contact with cover plate fully, causes contact resistance to increase like this, thereby increases loss, influences the performance index of filter.And the minor flaps 201 of interpolation has increased the volume of whole dielectric filter, and not only complex structure and take up room greatly causes waste of material.
Summary of the invention
The embodiment of the invention provides a kind of dielectric resonator and assembly method and a kind of dielectric filter, and the surface of dielectric resonance post and metallic cavity is contacted well, reduces the wastage, and improves the performance index of filter.
The embodiment of the invention provides a kind of dielectric resonator; Comprise dielectric resonance post and metallic cavity; Said dielectric resonance post is positioned at said metallic cavity, and the bottom surface of dielectric resonance post contacts with the bottom surface of said metallic cavity, also comprises: cover plate and conductive elastomer; Said cover plate is positioned at the upper surface of said metallic cavity, is used to seal said metallic cavity; Said conductive elastomer is used to make said cover plate to contact with the interior medium of dielectric resonance post between said cover plate and said dielectric resonance post.
The embodiment of the invention also provides a kind of dielectric filter, and said dielectric filter is formed by connecting one or more said dielectric resonators.
In addition, the embodiment of the invention provides a kind of assembly method of dielectric resonator, comprising:
The lower surface and the metallic cavity of dielectric resonance post are fixed;
The upper surface of said dielectric resonance post is linked to each other with cover plate through conductive elastomer.
The embodiment of the invention relies on the resilience force behind the conductive elastomer pressurized to guarantee good contact the between dielectric resonance post and the cover plate, guarantees that electric current transmits incessantly.Since the sealing contact, thus prevent that effectively electric current from leaking outside, thus improve the filtering performance of dielectric resonator, and reduced the volume of whole dielectric resonator.
Description of drawings
Fig. 1 is the sketch map of prior art TM mould dielectric filter;
Fig. 2 is a prior art medium resonator sketch map;
Fig. 3 is the dielectric resonator first example structure sketch map of the present invention;
Fig. 4 is a conductive elastomer structural representation of the present invention;
Fig. 5 is another structural representation of conductive elastomer of the present invention;
Fig. 6 is the another structural representation of conductive elastomer of the present invention;
Fig. 7 is the dielectric resonator second example structure sketch map of the present invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, 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 are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The embodiment of the invention provides a kind of dielectric resonator, comprising:
Dielectric resonance post and metallic cavity, said dielectric resonance post is positioned at said metallic cavity, and the bottom surface of dielectric resonance post contacts with the bottom surface of said metallic cavity; Also comprise: cover plate and conductive elastomer;
Said cover plate is positioned at the upper surface of said metallic cavity, is used to seal said metallic cavity;
Said conductive elastomer is used to make said cover plate to contact with the interior medium of dielectric resonance post between said cover plate and said dielectric resonance post.
Wherein, the bottom surface of the bottom surface of dielectric resonance post and said metallic cavity welds together.Resilience force behind the conductive elastomer pressurized can guarantee closely to contact between dielectric resonance post and the cover plate, guarantees that electric current transmits incessantly, thereby has improved filtering performance.In addition, this dielectric resonator is simple in structure, and volume is little.
Introduce dielectric resonator embodiment of the present invention below in detail, referring to Fig. 3, this figure is the dielectric resonator first example structure sketch map of the present invention.
This dielectric resonator comprises dielectric resonance post 302 and metallic cavity 304.
Said dielectric resonance post 302 is positioned at said housing, and the bottom surface of dielectric resonance post 302 contacts with the bottom surface of said housing.
The dielectric resonator that the embodiment of the invention provides also comprises: cover plate 303 and conductive elastomer 301.
Said cover plate 303 is positioned at the upper surface of said metallic cavity 304, and promptly the top is used to seal said metallic cavity 304.
Said conductive elastomer 301 is used to make sealing contact between the medium of said cover plate 303 and dielectric resonance post 302 between said cover plate 303 and said dielectric resonance post 302, guarantee current delivery.
Resilience force after conductive elastomer 301 utilization is compressed guarantees tight contact the between cover plate 303 and the medium, thereby guarantees the good transmission of electric current.
After whole dielectric resonator had assembled, conductive elastomer 301 received the pressure of cover plate 303 and medium, is in elastic deformation all the time.
The conductive elastomer that the embodiment of the invention provides is preferably silver-plated reed, can certainly conduct electricity good metal for other.
Reed preferably can be processed by the beryllium copper material.
Reed that beryllium copper is processed and said cover plate can weld together.
The connected mode of welding more helps current delivery, thereby can reduce current loss, helps improving the filtering performance of dielectric resonator.
Need to prove that conductive elastomer also can fix through other modes and cover plate, as long as help closely contacting and being convenient to current delivery.
The embodiment of the invention relies on dielectric resonator to rely on resilience force behind the conductive elastomer pressurized to guarantee tight contact the between dielectric resonance post and the cover plate, guarantees that electric current transmits incessantly.Because the sealing contact, thus prevent that effectively electric current from leaking outside, thus improve the performance of dielectric resonator.And, reduced the volume of whole dielectric resonator.
Referring to Fig. 4, this figure is a conductive elastomer structural representation in the embodiment of the invention.
Comprise centre bore a, annular bottom surface b and outer edge c.
Wherein, centre bore a is used to make tuning screw rod to pass.
Annular bottom surface b one side contacts with medium, and another side contacts with cover plate.The size of annular bottom surface b is identical with the bottom surface size of dielectric resonance post, and to guarantee that medium contacts with cover plate for sealing, electric current can good transmission.
Outer edge c contacts with cover plate.
The outer edge c of conductive elastomer can also be designed to shape with holes, as long as guarantee to contact the generation resilience force with cover plate, referring to Fig. 5.
Conductive elastomer also can have only an annular bottom surface b and centre bore a, referring to Fig. 6.
Need to prove that the diameter minimum of annular bottom surface b is identical with the bottom surface diameter of dielectric resonance post, so just can guarantee to seal said medium, makes the electric current good transmission.Certainly the diameter of annular bottom surface b can be greater than the diameter of dielectric resonance post bottom surface.Below only be the concrete shape embodiment of conductive elastomer, can design the shape and the size of conductive elastomer as required, as long as guarantee that medium contacts with cover plate for sealing, current delivery is smooth and easy between medium and the cover plate gets final product.
Dielectric resonator second example structure of the present invention is referring to Fig. 7.
The lower surface of dielectric resonance post 302 and metallic cavity 304 bottom surfaces weld together;
The connected mode of welding more helps current delivery, can reduce current loss, helps improving the filtering performance of dielectric resonator.
Dielectric resonator also comprises two radio frequency connectors 306.
Two radio frequency connectors 306 can one as signal input part, one as signal output part.
This dielectric resonator also comprises tuning screw rod 305.
Tuning screw rod 305 is positioned at the center of dielectric resonator, passes cover plate 303 and conductive elastomer 301, is used to adjust the frequency of dielectric resonator.
Need to prove that tuning screw rod 305 also can be installed in the bottom surface of dielectric resonator, promptly passes the bottom surface of metallic cavity 304.
The dielectric resonator that the embodiment of the invention provides can guarantee that medium contacts with cover plate for sealing, and current delivery is smooth and easy, prevents leakage of current, has improved the filtering performance of dielectric resonator.Because conductive elastomer is very thin reed, above directly carry out face and contact with cover plate, reduced the volume of whole dielectric resonator, saving space, and saving material.
The present invention also provides a kind of dielectric filter.
The dielectric filter that the embodiment of the invention provides comprises one or more like the said dielectric resonator of front embodiment.Said dielectric filter is linked together by one or more said dielectric resonators, forms multistage dielectric filter.Connected mode can for the series connection etc.
Dielectric filter provided by the invention can make the medium and the cover plate excellent sealing of dielectric resonance post, prevents leakage of current, thereby has improved the filtering performance of dielectric filter.
The embodiment of the invention also provides a kind of assembly method of dielectric resonator, comprising:
The lower surface and the metallic cavity of dielectric resonance post are fixed;
The upper surface of said dielectric resonance post is linked to each other with cover plate through conductive elastomer.
Here the assembly method of dielectric resonator is not limited to above-mentioned two steps, can also comprise the step that conductive elastomer is silver-plated, in order to strengthen electric conductivity.
The connected mode that adopts welding is with conductive elastomer and bridge welding is connected together and the bottom surface of dielectric resonance post and the bottom surface of metallic cavity are welded together; More help current delivery; Thereby can reduce current loss, help improving the filtering performance of dielectric resonator.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the said method execution mode is to instruct relevant hardware to accomplish through program; Described program can be stored in the computer read/write memory medium; This program can comprise the content of aforesaid each execution mode of communication means when carrying out.Here the alleged storage medium that gets, as: ROM/RAM, magnetic disc, CD etc.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Described program can be stored in the computer read/write memory medium; This program comprises the steps: the lower surface and the metallic cavity of dielectric resonance post are fixed when carrying out; The upper surface of said dielectric resonance post is linked to each other with cover plate through conductive elastomer.
Claims (10)
1. a dielectric resonator comprises dielectric resonance post and metallic cavity, and said dielectric resonance post is positioned at said metallic cavity, and the bottom surface of said dielectric resonance post contacts with the bottom surface of said metallic cavity; It is characterized in that, also comprise: cover plate and conductive elastomer;
Said cover plate is positioned at the upper surface of said metallic cavity, is used to seal said metallic cavity;
Said conductive elastomer is used to make said cover plate to contact with the interior medium of dielectric resonance post between said cover plate and said dielectric resonance post;
Said conductive elastomer comprises centre bore, annular bottom surface and outer edge; The one side of said annular bottom surface contacts with medium in the said dielectric resonance post, another side contacts with said cover plate, and the diameter of said annular bottom surface is more than or equal to the bottom surface diameter of said dielectric resonance post; Said outer edge contacts with said cover plate.
2. dielectric resonator according to claim 1 is characterized in that, said conductive elastomer is silver-plated reed.
3. dielectric resonator according to claim 2 is characterized in that, the material of said reed is a beryllium copper.
4. dielectric resonator according to claim 3 is characterized in that, reed that said beryllium copper is processed and said bridge welding are connected together.
5. dielectric resonator according to claim 1 is characterized in that the upper surface of said dielectric resonance post and lower surface are all silver-plated.
6. dielectric resonator according to claim 1 is characterized in that, the lower surface of said dielectric resonance post and metallic cavity bottom surface weld together.
7. dielectric resonator according to claim 6 is characterized in that, also comprises two radio frequency connectors; Said radio frequency connector is arranged on the side of said metallic cavity, is used for signal turnover dielectric resonator.
8. dielectric resonator according to claim 7 is characterized in that, also comprises tuning screw rod; Said tuning screw rod passes said cover plate and said conductive elastomer, is used to adjust the frequency of said dielectric resonator.
9. a dielectric filter is characterized in that, said dielectric filter is formed by connecting one or more dielectric resonators as claimed in claim 1.
10. the assembly method of a dielectric resonator is characterized in that, comprising:
The lower surface and the metallic cavity of dielectric resonance post are fixed;
The upper surface of said dielectric resonance post is linked to each other with cover plate through conductive elastomer; Wherein said conductive elastomer comprises centre bore, annular bottom surface and outer edge; The one side of said annular bottom surface contacts with medium in the said dielectric resonance post, another side contacts with said cover plate; And the diameter of said annular bottom surface is more than or equal to the bottom surface diameter of said dielectric resonance post, and said outer edge contacts with said cover plate.
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| CN2009101355471A CN101546857B (en) | 2009-04-21 | 2009-04-21 | A medium resonator and its assembling method, medium filter |
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| CN2009101355471A CN101546857B (en) | 2009-04-21 | 2009-04-21 | A medium resonator and its assembling method, medium filter |
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| CN101546857A CN101546857A (en) | 2009-09-30 |
| CN101546857B true CN101546857B (en) | 2012-11-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2499724A (en) * | 2012-02-24 | 2013-08-28 | Radio Design Ltd | Cavity filter comprising dielectric rod and flexible lid to compensate for mechanical tolerances |
| JP2016501491A (en) * | 2012-12-11 | 2016-01-18 | ゼットティーイー コーポレーションＺｔｅ Ｃｏｒｐｏｒａｔｉｏｎ | Dielectric resonator, assembly method thereof, and dielectric filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101895004A (en) * | 2010-03-17 | 2010-11-24 | 深圳市大富科技股份有限公司 | Dielectric resonator, flexible conductive shielding part and dielectric filter |
| CN102136620B (en) * | 2010-09-03 | 2013-11-06 | 华为技术有限公司 | Transverse magnetic mode dielectric resonator, transverse magnetic mode dielectric filter and base station |
| CN102136616B (en) * | 2010-11-23 | 2013-09-04 | 深圳市大富科技股份有限公司 | Cavity filter and communication equipment |
| CN202178353U (en) * | 2011-01-30 | 2012-03-28 | 深圳市大富科技股份有限公司 | Radio frequency communication equipment |
| CN102222811A (en) * | 2011-03-28 | 2011-10-19 | 聚信科技有限公司 | Filter |
| EP2538487A1 (en) * | 2011-06-24 | 2012-12-26 | CommScope Italy S.r.l. | Temperature-independent dielectric resonator |
| CN102324617B (en) * | 2011-07-08 | 2014-03-19 | 武汉凡谷电子技术股份有限公司 | Two-end-grounded TM (Transverse Magnetic) mode medium resonator |
| CN103035980B (en) * | 2011-09-30 | 2015-09-09 | 深圳市大富科技股份有限公司 | Dielectric filter and installation method, flexure strip and communication radio frequency device |
| CN103296351B (en) * | 2012-02-29 | 2019-02-22 | 深圳光启创新技术有限公司 | A kind of filter |
| CN103296368B (en) * | 2012-03-01 | 2017-05-24 | 深圳光启创新技术有限公司 | Harmonic oscillator and filter with harmonic oscillator |
| CN102637940A (en) * | 2012-04-27 | 2012-08-15 | 深圳市国人射频通信有限公司 | Dielectric filter band dielectric resonator thereof |
| CN104037484A (en) * | 2013-03-08 | 2014-09-10 | 中兴通讯股份有限公司 | Dielectric resonator and dielectric filter |
| CN104885293B (en) | 2013-12-30 | 2018-05-29 | 华为技术有限公司 | Resonator, wave filter, duplexer, multiplexer and communication equipment |
| EP3518341B1 (en) | 2014-05-07 | 2021-03-03 | Huawei Technologies Co., Ltd. | Transverse magnetic (tm) mode dielectric filter |
| CN107134628A (en) * | 2017-05-11 | 2017-09-05 | 深圳市国人射频通信有限公司 | A kind of dielectric resonator and its assembly method |
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| CN1147962C (en) * | 1998-01-05 | 2004-04-28 | 株式会社村田制作所 | Band elimination dielectric filter, dielectric duplexer and communication device using the same |
| CN1581569A (en) * | 2003-08-04 | 2005-02-16 | 松下电器产业株式会社 | Dielectric resonator, dielectric filter, and method of supporting dielectric resonance element |
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Patent Citations (2)
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| CN1147962C (en) * | 1998-01-05 | 2004-04-28 | 株式会社村田制作所 | Band elimination dielectric filter, dielectric duplexer and communication device using the same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2499724A (en) * | 2012-02-24 | 2013-08-28 | Radio Design Ltd | Cavity filter comprising dielectric rod and flexible lid to compensate for mechanical tolerances |
| JP2016501491A (en) * | 2012-12-11 | 2016-01-18 | ゼットティーイー コーポレーションＺｔｅ Ｃｏｒｐｏｒａｔｉｏｎ | Dielectric resonator, assembly method thereof, and dielectric filter |
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| CN101546857A (en) | 2009-09-30 |
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