CN202282437U - Four-cavity spiral filter - Google Patents
Four-cavity spiral filter Download PDFInfo
- Publication number
- CN202282437U CN202282437U CN2011204436007U CN201120443600U CN202282437U CN 202282437 U CN202282437 U CN 202282437U CN 2011204436007 U CN2011204436007 U CN 2011204436007U CN 201120443600 U CN201120443600 U CN 201120443600U CN 202282437 U CN202282437 U CN 202282437U
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- chamber
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- screw
- shielding cavity
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Abstract
The utility model provides a parallel four-cavity spiral filter, in order to filter high power signals of a wired television. The four-cavity spiral filter is provided with a structure different from the prior multi-cavity square array structure, is provided with a high Q value and smaller design parameters in VHF and UHF frequency ranges, can endure high power capacity, is flat in profile, and is suitable to be mounted in a common plugging slot, thereby being helpful for integrated design.
Description
Technical field
The utility model relates to a kind of electronic devices and components, relates in particular to a kind of VHF of being used for frequency range to the anti-interference filter that the transceiver of special demands is arranged.
Background technology
Current electromagnetic signal is intensive day by day, complicated, no matter be commercial communication equipment or military communications equipment, to antijamming capability require increasingly high.For improving the antijamming capability of transceiver; It is now technical that what generally adopt is to increase high performance filter in receiving front-end or emission rear end to realize; Comparatively advanced like the piezoelectric crystal resonator etc., but its coaxial osciallator volume is still too big, is not suitable for the application of VHF and uhf band; Because the particularity of filter location so its performance is had particular requirement, suppresses outward like extremely low insertion loss and high band, this also is that the filter institute of existing multi-cavity square formation structure is inefficient.
Summary of the invention
The purpose of the utility model be to overcome the deficiency of existing filter and a kind of VHF of being used for frequency range of inventing to the anti-interference filter that the transceiver of special demands is arranged.
The purpose of the utility model can be passed through following measure and realized:
A kind of four chamber screw-filters of the utility model; Comprise successively input adapter, four spiral resonant cavitys (chamber A, chamber B, chamber C, chamber D), the out splice going splice that is electrically connected and be provided with the shielding cavity of top cover; Four spiral resonant cavitys are installed in the shielding cavity, and input adapter and out splice going splice are fixedly connected on the shielding cavity two ends.Described four chamber screw-filters adopt parallel two-chamber coupling spiral resonance structure, and four spiral resonant cavitys are arranged in parallel within the shielding cavity bottom; Described input adapter and out splice going splice adopt coaxial fitting, are fixedly connected on the shielding cavity two ends and are positioned at highly place, spiral resonant cavity bottom 1/4th, are electrically connected with chamber A, chamber D respectively; Described shielding cavity adopts one-time formed side's cavity configuration; Described top cover is provided with tuning screw.
Described spiral resonant cavity comprises helical coil, medium post, tuning screw, and described medium post adopts polytetrafluoroethylmaterial material, and helical coil is wrapped on the medium post, and the medium column top is provided with tuning screw.
Described shielding cavity and top cover adopt brass to make, and the cavity inner surface of polishing is provided with silvering, and shielding cavity and top cover are fixed together.
Described tuning screw adopts brass material, has seven, four spiral resonant cavity tuning screws, three coupling tuning screws; The coupling tuning screw is distributed between adjacent two spiral resonant cavity tuning screws, and in one line being installed on the top cover is electrically connected and reliable ground with top cover, shielding cavity.
The four chamber screw-filters of the utility model, external form is more flat, is suitable for being installed in the common plug groove; Multi-cavity square formation structure more in the past is more conducive to integrated design, and whole design warp modeling and simulation on HFSS, and has carried out actual test; At VHF, uhf band, cavity body filter have high Q value and less design parameter; Have stronger coupling performance and high Q value, can bear high power capacity, therefore can be used widely.
Description of drawings
Fig. 1 is the structural representation of the four chamber screw-filters of the utility model.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer, will combine accompanying drawing that the utility model is done to describe in detail further below.
As shown in Figure 1; A kind of four chamber screw-filters that the utility model provides; Comprise successively the input adapter that is electrically connected 5, four spiral resonant cavitys (chamber A1, chamber B2, chamber C3, chamber D4), out splice going splices 6 and be provided with the shielding cavity 8 of top cover 9; Four spiral resonant cavitys are installed in the shielding cavity 8, and input adapter 5 is fixedly connected on shielding cavity 8 two ends with out splice going splice 6.Four chamber screw-filters adopt parallel two-chamber coupling spiral resonance structure, and four spiral resonant cavitys are arranged in parallel within shielding cavity 8 bottoms; Input adapter 5 adopts coaxial fitting with out splice going splice 6, is fixedly connected on shielding cavity 8 two ends and is positioned at highly place, spiral resonant cavity bottom 1/4th, is electrically connected with chamber A1, chamber D2 respectively; Shielding cavity 8 adopts one-time formed side's cavity configuration; Top cover 9 is provided with tuning screw 7.
The spiral resonant cavity comprises helical coil 10, medium post 11, tuning screw 7, and medium post 11 adopts polytetrafluoroethylmaterial material, and helical coil 10 is wrapped on the medium post 11, and medium post 11 tops are provided with tuning screw 7.
Shielding cavity 8 adopts brass to make with top cover 9, and shielding cavity 8 inner surfaces of polishing are provided with silvering, and shielding cavity 8 is fixed together with top cover 9.
Tuning screw 7 adopts brass material, has seven, and four is spiral resonant cavity tuning screw, and three are the coupling tuning screw; The coupling tuning screw is distributed between adjacent two spiral resonant cavity tuning screws, and in one line being installed on the top cover 9 is electrically connected and reliable ground with top cover 9, shielding cavity 8.
During enforcement; The boundary condition of cavity coupled structure is very complicated, and complexity that electricity consumption Magnetic Field Numerical method is calculated and amount of calculation are all very big, and the utility model adopts HFSS software to be optimized analysis; Can know through modeling and software emulation analysis; When two helixes were vertical each other, its degree of coupling was minimum, and the coupling of parallel spiral structure is stronger.Design with parallel two-chamber coupling spiral resonance structure, this also is a kind of horizontal spiral filter structure.The parallel symmetrical structure of resonant cavity is easy to processing and installs; The shaft length of coil approximates 1/4 λ; Operation principle is similar in appearance to the coaxial resonator of 1/4 λ, and n resonant cavity is equivalent to the coaxial resonator of n 1/4 λ, and the coupling between each resonator is accomplished with the division board of top windowing.Because coil is the inner wire curl, electromagnetic wave must transmit along each circle of coil successively, so reduced the length of resonator greatly, the volume of filter has also dwindled.Coaxial fitting is adopted in input and output, and the position is at 1/4 place of coil bottom.One 1 screws of 2n through on the adjustment filter can change filter bandwidht resonant position, make filter have good pass-band performance.The while adjustment screw is spun on the shielding box body, and dead ground makes adjusting noiseless.The induction coefficient of filter
L＝0.269×n
2d
2[1-d/D
2]γH
In the formula: n=1/ τ, for every meter the helix number of turns, promptly enclose density.
Parameters the author designs and revises according to following empirical equation:
0.45＜d/D＜0.65；1≤b/d≤4；
In the formula: D is the radome internal diameter, and d is the average diameter in the middle of the helical coil; Z is the length of coil; B is the shaft length of coil; T is the coil average headway; Q
0Be resonator Q value; d
0Be diameter of wire, f is an operating frequency; Long measure is got mm.The designing requirement of other indexs: centre frequency 133MHz, three dB bandwidth 3MHz gets attenuation outside a channel at f ± 0.05f >=20dB.And, confirm that coil turn is 7 circles according to the approximate formula of these specification requirements and maximally-flat characteristic.Thus, can confirm: l=1/4 λ ≈ 564mm, d=1mm, τ=5.5mm,
Confirm that through simulation optimization the distance of two cavitys is the diameter D=36.7mm of 37.5mm and cavity, depth H=57.5mm, and to get helix be empirical value D/4 apart from cavity up and down.Simultaneously can get Q0=2.36*57.5*133
1/2≈ 1565.The wherein decay in the decision of the coupling between the wire spiral passband; The spacing of cavity has the greatest impact for the response frequency of filter, plays a decisive role, and frequency confirms that back its spacing is also definite basically; And its diameter and the degree of depth have the greatest impact for the Q value of filter cavity.The confirming mainly of overall dimension obtains the fits best of each parameter of filter according to emulation and the optimization of HFSS.The manufacturing process of four chamber screw-filters: adopt brass as shielding cavity and cap material, the medium post of support helix line adopts polytetrafluoroethylmaterial material, and the top tuning screw is a brass, and joint adopts sub-miniature A connector.Whole box body is inner to form with the milling cutter time processing, the electromagnetic-wave leakage of avoiding the assembly unit box body to bring, establish rationally that juice helps making simple and easy of structure and making things convenient for.
The four chamber screw-filters of the utility model, at VHF, uhf band has high Q value and less design parameter; Have stronger coupling performance and high Q value, can bear high power capacity, therefore can be used widely.
The above is the preferred implementation of the utility model; Certainly can not limit the interest field of the utility model with this; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and change, these improvement and change also are regarded as the protection range of the utility model.
Claims (4)
1. chamber screw-filter; Comprise successively input adapter, chamber A, chamber B, chamber C, chamber D four spiral resonant cavitys, the out splice going splices that are electrically connected and be provided with the shielding cavity of top cover; Four spiral resonant cavitys are installed in the shielding cavity; Input adapter and out splice going splice are fixedly connected on the shielding cavity two ends, it is characterized in that: described four chamber screw-filters adopt parallel two-chamber coupling spiral resonance structure, and four spiral resonant cavitys are arranged in parallel within the shielding cavity bottom; Described input adapter and out splice going splice adopt coaxial fitting, are fixedly connected on the shielding cavity two ends and are positioned at highly place, spiral resonant cavity bottom 1/4th, are electrically connected with chamber A, chamber D respectively; Described shielding cavity adopts one-time formed side's cavity configuration; Described top cover is provided with tuning screw.
2. a kind of four chamber screw-filters according to claim 1; It is characterized in that: described spiral resonant cavity comprises helical coil, medium post, tuning screw; Described medium post adopts polytetrafluoroethylmaterial material, and helical coil is wrapped on the medium post, and the medium column top is provided with tuning screw.
3. a kind of four chamber screw-filters according to claim 1 is characterized in that: described shielding cavity and top cover adopt brass to make, and the shielding cavity inner surface of polishing is provided with silvering, and shielding cavity and top cover are fixed together.
4. a kind of four chamber screw-filters according to claim 1 is characterized in that: described tuning screw adopts brass material, has seven, four spiral resonant cavity tuning screws, three coupling tuning screws; The coupling tuning screw is distributed between adjacent two spiral resonant cavity tuning screws, and in one line being installed on the top cover is electrically connected and reliable ground with top cover, shielding cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204436007U CN202282437U (en) | 2011-11-10 | 2011-11-10 | Four-cavity spiral filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204436007U CN202282437U (en) | 2011-11-10 | 2011-11-10 | Four-cavity spiral filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202282437U true CN202282437U (en) | 2012-06-20 |
Family
ID=46228592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204436007U Expired - Fee Related CN202282437U (en) | 2011-11-10 | 2011-11-10 | Four-cavity spiral filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202282437U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207638A (en) * | 2015-11-11 | 2015-12-30 | 中国科学院国家天文台 | Ultra-low-loss microstrip high-pass filter with coaxial-line inductors |
| CN105428764A (en) * | 2015-12-10 | 2016-03-23 | 西安市索飞微波技术有限公司 | Broad-band large-power spiral filter |
| CN107528107A (en) * | 2017-01-19 | 2017-12-29 | 陕西索飞电子科技有限公司 | A kind of across several times sound interval transmitting-receiving multiplexers |
| TWI660542B (en) * | 2017-09-30 | 2019-05-21 | 大陸商廈門松元電子有限公司 | Multi-resonator bandpass filter |
| CN110534856A (en) * | 2019-07-26 | 2019-12-03 | 苏州诺泰信通讯有限公司 | A kind of input and output coupled structure of Novel Filter port on the cover board |
-
2011
- 2011-11-10 CN CN2011204436007U patent/CN202282437U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207638A (en) * | 2015-11-11 | 2015-12-30 | 中国科学院国家天文台 | Ultra-low-loss microstrip high-pass filter with coaxial-line inductors |
| CN105207638B (en) * | 2015-11-11 | 2017-08-29 | 中国科学院国家天文台 | A kind of ultra-low loss coaxial line inductance micro-strip high-pass filter |
| CN105428764A (en) * | 2015-12-10 | 2016-03-23 | 西安市索飞微波技术有限公司 | Broad-band large-power spiral filter |
| CN107528107A (en) * | 2017-01-19 | 2017-12-29 | 陕西索飞电子科技有限公司 | A kind of across several times sound interval transmitting-receiving multiplexers |
| TWI660542B (en) * | 2017-09-30 | 2019-05-21 | 大陸商廈門松元電子有限公司 | Multi-resonator bandpass filter |
| CN110534856A (en) * | 2019-07-26 | 2019-12-03 | 苏州诺泰信通讯有限公司 | A kind of input and output coupled structure of Novel Filter port on the cover board |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen Sanshrill Technology Co.,Ltd. Assignor: Shenzhen Dewo Device Technology Co., Ltd. Contract record no.: 2014440020379 Denomination of utility model: Four-cavity spiral filter Granted publication date: 20120620 License type: Exclusive License Record date: 20141121 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhu Hui Inventor before: Zhu Hui Inventor before: Hu Haiping |
|
| COR | Change of bibliographic data | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120620 Termination date: 20191110 |