CN100553033C - The capacitive coupling device of coaxial cavity filter - Google Patents
The capacitive coupling device of coaxial cavity filter Download PDFInfo
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- CN100553033C CN100553033C CNB2006100283896A CN200610028389A CN100553033C CN 100553033 C CN100553033 C CN 100553033C CN B2006100283896 A CNB2006100283896 A CN B2006100283896A CN 200610028389 A CN200610028389 A CN 200610028389A CN 100553033 C CN100553033 C CN 100553033C
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- metal bar
- capacitive coupling
- coaxial cavity
- coupling device
- insulated support
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- 230000008878 coupling Effects 0.000 title claims abstract description 29
- 238000010168 coupling process Methods 0.000 title claims abstract description 29
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 61
- 229910052751 metal Inorganic materials 0.000 claims abstract description 61
- 239000000463 material Substances 0.000 claims description 6
- 229910001369 Brass Inorganic materials 0.000 claims description 4
- 239000010951 brass Substances 0.000 claims description 4
- ALKZAGKDWUSJED-UHFFFAOYSA-N dinuclear copper ion Chemical compound [Cu].[Cu] ALKZAGKDWUSJED-UHFFFAOYSA-N 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 8
- 230000001939 inductive effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000006880 cross-coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The present invention relates to the capacitive coupling device of coaxial cavity filter, this device comprises first metal bar, second metal bar, insulated support, pad, described first metal bar passes insulated support and is connected with second metal bar, is provided with pad between described first metal bar, second metal bar and the insulated support.Compared with prior art, the present invention can realize the capacitive coupling that is easy to produce in batches and can guarantee good conformity of production and product stability.
Description
Technical field
The present invention relates to the coupling device in the filter, relate in particular to the capacitive coupling device of coaxial cavity filter.
Background technology
Filter is as an indispensable device, and its ratio of performance to price is also more and more challenging.An apparent in view variation is exactly the selectivity of filter, and just passband becomes more and more narrow to the transition frequency section of stopband, and traditional Chebyshev filter can't meet the demands fully, and elliptic function filter has become quite universal.
Usually in coaxial cavity filter, the coupling between adjacent resonators all is to realize by the window of opening on the common wall between these two cavitys.Such coupling is inductive coupled.In order to realize elliptic function filter, between non-adjacent resonator, not only need inductive coupledly, also need capacitive coupling, producing transmission zero, thereby improve the selectivity of filter.Transmission zero (transmission zeros) is exactly the trap point, can think the zero point on the response curve S21.It can be in the monolateral or bilateral generation transmission zero of filter passband, and band is outer to be suppressed to improve.Utilize transmission zero that the low order wavenumber filter is obtained and the same good characteristic of high-order wavenumber filter.
It is a lot of to produce capacitively coupled method in coaxial cavity filter.As shown in Figure 1, general is exactly respectively to form an electric capacity on the top of the inner wire of two coaxial cavities, and then by one section transmission line these two electric capacity is joined.The length of this section transmission line can not be oversize, the longlyest can not surpass λ/4, otherwise can become the capacitive coupling inductive coupled.Realize that capacitively coupled concrete structure is existing a lot, has not just mentioned one by one here.The present invention than before the copper wire form of doing transmission line a kind of dumbbell type structure of novelty will be provided so that the easier realization consistency of capacitive coupling, stability, and be more suitable for producing in batches; Also can realize big capacitive coupling.
Summary of the invention
Purpose of the present invention is exactly the capacitive coupling device that a kind of coaxial cavity filter is provided for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions: the capacitive coupling device of coaxial cavity filter, it is characterized in that, this device comprises first metal bar, second metal bar, insulated support, pad, described first metal bar passes insulated support and is connected with second metal bar, is provided with pad between described first metal bar, second metal bar and the insulated support.
Described first metal bar is step-like, with the insulated support tight fit.
Described first metal bar is provided with external screw thread, and described second metal bar is provided with internal thread, and this second metal bar is connected by its internal and external threads with first metal bar.
Described insulated support is rounded, and the centre is provided with the circular hole that can supply first metal bar to embed, and is provided with the circular groove that forms interference fit with coaxial cavity.
Described insulated support adopts polytetrafluoroethylmaterial material.
Flange can be made to form the dumbbell structure in described first metal bar and the second metal bar two ends, and this first metal bar and second metal bar can adopt brass material, electroplate.
Described spacer thickness is the red copper copper sheet of 0.3～0.5mm.
Compared with prior art, the present invention is simple in structure, reliable and stable, and high conformity be easy to assembling, and productibility is good.
Description of drawings
Fig. 1 is capacitively coupled structural representation between existing coaxial cavity;
Fig. 2 is the structural representation of first metal bar among the present invention;
Fig. 3 is the structural representation of second metal bar among the present invention;
Fig. 4 is the structural representation of insulated support among the present invention;
Fig. 5 is the structural representation of Intermediate gasket of the present invention;
Fig. 6 is a structural representation of the present invention;
Fig. 7 places cutaway view on the coaxial cavity for the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
Shown in Fig. 2～6, the capacitive coupling device of coaxial cavity filter, this device comprises first metal bar 1, second metal bar 2, insulated support 3, pad 4, described first metal bar 1 passes insulated support 3 and is connected with second metal bar 2, is provided with pad 4 between described first metal bar 1, second metal bar 2 and the insulated support 3.Described first metal bar 1 is step-like, with insulated support 3 tight fits; Described first metal bar 1 is provided with external screw thread, and described second metal bar 2 is provided with internal thread, and this second metal bar 2 is connected by its internal and external threads with first metal bar 1; Described insulated support 3 is rounded, and the centre is provided with the circular hole that can embed for first metal bar 1, and is provided with the circular groove that forms interference fit with coaxial cavity; Described insulated support 3 adopts polytetrafluoroethylmaterial material; Flange can be made to form the dumbbell structure in described first metal bar 1 and second metal bar, 2 two ends, and this first metal bar 1 and second metal bar 2 can adopt brass material, electroplate; Described pad 4 thickness are the red copper copper sheet of 0.3～0.5mm.
The assembling process of the capacitive coupling device of this coaxial cavity filter is:
With pack into the step of first metal bar of insulated support;
Second metal bar is screwed in the male thread portion (before the screw-in shimming) as required of first metal bar, screw to guarantee that insulated support does not have relative displacement to first metal bar and second metal bar;
Points for attention: make clean no-sundries in the screw that must guarantee each parts before the COUPLING assembly, need wear gloves during operation with the protection silver-plated surface.
Two end faces of the dumbbell of assembling after finishing form electric capacity with the resonatron of both sides respectively, can realize bigger capacitive coupling, and can be by adding the size that brass shim spacer realizes the trimmer amount.
As shown in Figure 7, coaxial cavity comprises cover plate 5, tuning screw clamp nut 6, outer conductor 7, first die cavity 8, second die cavity 9, inner wire 10.The capacitive coupling device of coaxial cavity filter places in the mounting groove, and the fluting of the strutting piece bottom bottom of the groove on the wall together adopts interference fit, and the capacitive coupling assembly is stuck on the cavity securely, and its upper surface will exceed the about 0.5mm of upper surface of dividing wall.Like this, after the cover plate of resonant cavity was fixed on the cavity by tuning screw, fixedly the capacitive coupling assembly also was fixed.So just accomplished the consistency that the capacitive coupling realizes, stability, and in the debug process of filter, do not need to regulate cross-couplings again, be more suitable for producing in batches.
Claims (7)
1. the capacitive coupling device of coaxial cavity filter, it is characterized in that, this device comprises first metal bar, second metal bar, insulated support and pad, described first metal bar passes insulated support and is connected with second metal bar, is provided with pad between described first metal bar, second metal bar and the insulated support.
2. the capacitive coupling device of coaxial cavity filter according to claim 1 is characterized in that, described first metal bar is step-like, with the insulated support tight fit.
3. the capacitive coupling device of coaxial cavity filter according to claim 1 is characterized in that, described first metal bar is provided with external screw thread, and described second metal bar is provided with internal thread, and this second metal bar is connected by its internal and external threads with first metal bar.
4. the capacitive coupling device of coaxial cavity filter according to claim 1 is characterized in that, described insulated support is rounded, and the centre is provided with the circular hole that can supply first metal bar to embed, and is provided with the circular groove that forms interference fit with coaxial cavity.
5. according to the capacitive coupling device of claim 1 or 4 described coaxial cavity filters, it is characterized in that described insulated support adopts polytetrafluoroethylmaterial material.
6. the capacitive coupling device of coaxial cavity filter according to claim 1, it is characterized in that, flange is made to form the dumbbell structure in described first metal bar and the second metal bar two ends, and this first metal bar and second metal bar adopt brass material, electroplate.
7. the capacitive coupling device of coaxial cavity filter according to claim 1 is characterized in that, described pad is that thickness is the red copper copper sheet of 0.3～0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100283896A CN100553033C (en) | 2006-06-29 | 2006-06-29 | The capacitive coupling device of coaxial cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100283896A CN100553033C (en) | 2006-06-29 | 2006-06-29 | The capacitive coupling device of coaxial cavity filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101098033A CN101098033A (en) | 2008-01-02 |
| CN100553033C true CN100553033C (en) | 2009-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100283896A Active CN100553033C (en) | 2006-06-29 | 2006-06-29 | The capacitive coupling device of coaxial cavity filter |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101541292B1 (en) * | 2009-06-18 | 2015-08-06 | 주식회사 에이스테크놀로지 | Cross Coupling Adjusting Device and RF Cavity Filter Including the Same |
| CN101599569B (en) * | 2009-07-17 | 2013-06-05 | 华为技术有限公司 | Coupling structure and coaxial-cavity filter |
| CN104702232A (en) * | 2013-12-06 | 2015-06-10 | 北京北广科技股份有限公司 | Filter adjusting rod |
| US10985435B2 (en) * | 2018-07-20 | 2021-04-20 | The Boeing Company | Tunable probe for high-performance cross-coupled RF filters |
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2006
- 2006-06-29 CN CNB2006100283896A patent/CN100553033C/en active Active
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| Publication number | Publication date |
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| CN101098033A (en) | 2008-01-02 |
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Owner name: KAELUS COMMUNICATION EQUIPMENT (SHANGHAI) CO., LTD Free format text: FORMER NAME: ALLRIZON-TONGGUANG COMMUNICATIONS EQUIPMENT (SHANGHAI) CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 200335 Shanghai city Changning District Guang Shun building B No. 33 south room two floor of the South Tower Patentee after: Kai Kai communications equipment (Shanghai) Co., Ltd. Address before: Changning District Tianshan Road 200335 Shanghai City 789 Building No. 3 West Patentee before: Allrizon-Tongguang Communications Equipment (Shanghai) Co., Ltd. |