CN108091966A - A kind of adjustable mechanical wave filter - Google Patents
A kind of adjustable mechanical wave filter Download PDFInfo
- Publication number
- CN108091966A CN108091966A CN201711281597.1A CN201711281597A CN108091966A CN 108091966 A CN108091966 A CN 108091966A CN 201711281597 A CN201711281597 A CN 201711281597A CN 108091966 A CN108091966 A CN 108091966A
- Authority
- CN
- China
- Prior art keywords
- resonator
- wave filter
- transmission device
- pad
- tuning plug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention discloses a kind of adjustable mechanical wave filter, including direct current generator, transmission device and resonance device；The direct current generator is arranged on the top of transmission device, and resonance device is arranged on the lower section of transmission device, is isolated between transmission device and resonance device by cover board；The transmission device includes transmission shaft and stent, and the transmission shaft is fixedly connected with direct current generator, and transmission shaft is flexibly connected with stent by screw structure, and tuning plug straight down is equably fixed on stent, and the lower end of tuning plug is extend into resonator；The resonance device includes filter cavity, cover board, resonator and tuning plug；The filter cavity is the rectangular parallelepiped structure of closing, is provided with resonator symmetrical before and after four in filter cavity body, is connected between adjacent resonator by coupling slot.The present invention utilizes the differentiated frequency compensation of intra resonant cavity, reaches the uniformity of tuning plug displacement and resonant frequency variation, so as to fulfill the stability of wave filter amplitude versus frequency characte.
Description
Technical field
The present invention relates to a kind of mechanical filters, and in particular to a kind of adjustable mechanical wave filter.
Background technology
Mechanical filter refers to the wave filter being made of mechanical vibrator, mechanical coupling element and electromechanical transducer.It has
The performance characteristics of highly selective, high reliability and high stability, at the same have it is small, light-weight, at low cost and it is suitable from
The advantages of dynamic metaplasia production, therefore be widely used in electronic device field.Adjustable mechanical wave filter, that is, working frequency
Adjustable mechanical filter.
In general, adjustable mechanical wave filter uses the resonance frequency of the multiple resonators of transmission mechanism Synchronization Control in structure
Rate realizes the function of changing working frequency.However, traditional adjustable mechanical wave filter has the following disadvantages：（1）Wave filter is needing
Will be wider frequency-tuning range when, be not easy to reach stable amplitude-frequency response, resonator frequency changed with tuning setting one
Cause property is poor.（2）Frequency drift of the wave filter in wide temperature range is big, and stability is low, influences practical application.
The content of the invention
Goal of the invention：Present invention aims in view of the deficiencies of the prior art, provide a kind of adjustable mechanical wave filter.This hair
The bright differentiated compensating for coupling using intra resonant cavity reaches the uniformity of tuning plug displacement and resonant frequency variation, so as to real
The stability of existing wave filter amplitude versus frequency characte.
Technical solution：Adjustable mechanical wave filter of the present invention, including direct current generator, transmission device and resonance device；
The direct current generator is arranged on the top of transmission device, and resonance device is arranged on the lower section of transmission device, transmission device with
Isolated between resonance device by cover board；
The transmission device includes transmission shaft and stent, and the transmission shaft is fixedly connected with direct current generator, and transmission shaft leads to stent
Screw structure flexible connection is crossed, tuning plug straight down is equably fixed on stent, the lower end of tuning plug extend into resonance
Intracavitary；
The resonance device includes filter cavity, cover board, resonator and tuning plug；The filter cavity is rectangular for closing
Body structure is provided with resonator symmetrical before and after four in filter cavity body, is respectively the first resonator, the second resonance
Chamber, the 3rd resonator and the 4th resonator are connected by coupling slot between adjacent resonator；
First resonator is identical with the 4th resonator shape, and the bottom of the first resonator and the 4th resonator is both provided with
One dielectric pad；Second resonator and the 3rd resonator shape are identical, and the bottom of the second resonator and the 3rd resonator is folded
It adds and is equipped with second medium pad and the 3rd dielectric pad, the 3rd dielectric pad is located above second medium pad.
Further, the tuning plug is made of indium Steel material.
Further, the first medium pad is made of polystyrene stiff foam material, and the thickness of first medium pad is
5mm。
Further, the second medium pad is made of polystyrene stiff foam material, and the thickness of second medium pad is
3mm。
Further, the 3rd dielectric pad is made of polytetrafluoroethylene material, and the thickness of the 3rd dielectric pad is 2mm.
Advantageous effect：（1）The present invention by intra resonant cavity carry out differentiated frequency compensation, make tuning plug displacement with it is humorous
The relation of vibration frequency reaches uniformity, realizes stabilization of the wave filter in each frequency band amplitude versus frequency characte.
（2）The tuning plug of the present invention is made of extremely low-expansion indium Steel material, can be realized in wider temperature
In the range of, frequency drift is small, and stability is preferable.
（3）The present invention does not interfere with cavity resonant by the way of the dielectric pad of low-k is set in resonator
The size of chamber, it is simple to operate, debugging efficiency is improved, has saved production hour and cost.
Description of the drawings
Fig. 1 is structure chart of the present invention.1st, direct current generator；2nd, transmission shaft；3rd, stent；4th, cover board；5th, tuning plug；6th, resonance
Chamber；7th, filter cavity；8th, coupling slot；9th, first medium pad；10th, second medium pad；11st, the 3rd dielectric pad；61st, the first resonance
Chamber；62nd, the second resonator, the 63, the 3rd resonator；64th, the 4th resonator.
Fig. 2 is Fig. 1 intra resonant cavity structure diagrams.
Specific embodiment
Technical solution of the present invention is described in detail below by attached drawing, but protection scope of the present invention is not limited to
The embodiment.
Embodiment 1：A kind of adjustable mechanical wave filter, as shown in Figure 1, including direct current generator 1, transmission device and tuning dress
It puts.
The direct current generator 1 is arranged on the top of transmission device, and resonance device is arranged on the lower section of transmission device, transmission dress
It puts and is isolated between resonance device by cover board 4.
The transmission device includes transmission shaft 2 and stent 3, and the transmission shaft 2 is fixedly connected with direct current generator 1, transmission shaft 2
It is flexibly connected with stent 3 by screw structure, is equably fixed with tuning plug 5 straight down on stent 3, under tuning plug 5
End is extend into resonator 6.Moving up and down for stent 3 is controlled by direct current generator 1, so as to control the up and down motion of tuning plug 5.
The resonance device includes filter cavity 7, cover board 4, resonator 6 and tuning plug 5.The filter cavity 7 is
The rectangular parallelepiped structure of closing, filter cavity 7 is interior to be set there are four front and rear symmetrical resonator 6, is respectively the first resonance
Chamber 61, the second resonator 62, the 3rd resonator 63 and the 4th resonator 64 are connected by coupling slot between adjacent resonator 6.
The resonator 6 is coaxial resonant cavity, and the tuning plug 5 is also the inner wire of resonator 6, is filled by direct current generator 1 and transmission
Put displacement of the control tuning plug 5 in resonator 6.Due in wide temperature range, with the variation of environment temperature, tuning plug 5
Length is influenced by heat expansion effect and changing for size occurs, and is changed so as to cause filter passband frequency, therefore described
Tuning plug 5 is made of extremely low-expansion indium Steel material, to ensure the stability of 5 length of tuning plug, so as to fulfill filtering
The stability of device frequency.
As shown in Fig. 2, first resonator 61 is identical with 64 shape of the 4th resonator, the first resonator 61 and the 4th is humorous
The shake bottom of chamber 64 is both provided with first medium pad 9, and the first medium pad 9 is made of polystyrene stiff foam material, the
The thickness of one dielectric pad 9 is 5mm.Second resonator 62 is identical with 63 shape of the 3rd resonator, the second resonator 62 and
The bottom of three resonators 63 has been superposed 10 and the 3rd dielectric pad 11 of second medium pad, and the 3rd dielectric pad 11 is located at the
10 top of second medium pad.The second medium pad 10 is made of polystyrene stiff foam material, the thickness of second medium pad 10
For 3mm, the 3rd dielectric pad 11 is made of polytetrafluoroethylene material, and the thickness of the 3rd dielectric pad 11 is 2mm.
The cover board 4 is arranged between transmission device and tuner, for Isolated Shield interference signal.
Adjustable mechanical wave filter of the present invention stretches into displacement in resonator 6, so as to adjust by adjusting tuning plug 5
The band connection frequency of wave filter.The factor for influencing filter resonance frequency mainly has the length of tuning plug 5, input and output coupling and coupling
Close slot 8.Due to going deep into the change of length in resonator 6 with tuning plug 5, the input and output coefficient of coup can change, so as to
Cause the non-linear of 5 position of tuning plug and frequency, it is this it is non-linear can be by the way that 1 number of steps of direct current generator be controlled to be modified；
However the nonlinear characteristic in 5 position of tuning plug of each resonator Unit 6 and frequency is not consistent, causes wave filter not
With the change of the pass-band performance of frequency range, mainly cause the significantly change of passband fluctuation and return loss.Therefore, the present invention uses
6 bottom of resonator sets the mode of dielectric pad, by carrying out differentiated frequency compensation inside each resonator 6, makes each humorous
The resonant frequency variable quantity of chamber of shaking is consistent in the case of simultaneous tuning, realizes amplitude-frequency of the wave filter in each tunable band
The stabilization of characteristic.
As described above, although the present invention has been represented and described with reference to specific preferred embodiment, must not explain
For to the limitation of itself of the invention.It, can be right under the premise of the spirit and scope of the present invention that appended claims define are not departed from
Various changes can be made in the form and details for it.
Claims (5)
1. a kind of adjustable mechanical wave filter, it is characterised in that：Including direct current generator, transmission device and resonance device；
The direct current generator is arranged on the top of transmission device, and resonance device is arranged on the lower section of transmission device, transmission device with
Isolated between resonance device by cover board；
The transmission device includes transmission shaft and stent, and the transmission shaft is fixedly connected with direct current generator, and transmission shaft leads to stent
Screw structure flexible connection is crossed, tuning plug straight down is equably fixed on stent, the lower end of tuning plug extend into resonance
Intracavitary；
The resonance device includes filter cavity, cover board, resonator and tuning plug；The filter cavity is rectangular for closing
Body structure is provided with resonator symmetrical before and after four in filter cavity body, is respectively the first resonator, the second resonance
Chamber, the 3rd resonator and the 4th resonator are connected by coupling slot between adjacent resonator；
First resonator is identical with the 4th resonator shape, and the bottom of the first resonator and the 4th resonator is both provided with
One dielectric pad；Second resonator and the 3rd resonator shape are identical, and the bottom of the second resonator and the 3rd resonator is folded
It adds and is equipped with second medium pad and the 3rd dielectric pad, the 3rd dielectric pad is located above second medium pad.
2. adjustable mechanical wave filter according to claim 1, it is characterised in that：The tuning plug uses indium Steel material system
Make.
3. adjustable mechanical wave filter according to claim 1, it is characterised in that：The first medium pad uses polystyrene
Stiff foam material is made, and the thickness of first medium pad is 5mm.
4. adjustable mechanical wave filter according to claim 1, it is characterised in that：The second medium pad uses polystyrene
Stiff foam material is made, and the thickness of second medium pad is 3mm.
5. adjustable mechanical wave filter according to claim 1, it is characterised in that：3rd dielectric pad uses polytetrafluoroethyl-ne
Alkene material is made, and the thickness of the 3rd dielectric pad is 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711281597.1A CN108091966A (en) | 2017-12-07 | 2017-12-07 | A kind of adjustable mechanical wave filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711281597.1A CN108091966A (en) | 2017-12-07 | 2017-12-07 | A kind of adjustable mechanical wave filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108091966A true CN108091966A (en) | 2018-05-29 |
Family
ID=62174248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711281597.1A Withdrawn CN108091966A (en) | 2017-12-07 | 2017-12-07 | A kind of adjustable mechanical wave filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108091966A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10701823B1 (en) | 2019-02-25 | 2020-06-30 | Nokia Shanghai Bell Co., Ltd. | Enclosure for electronic components |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0750503A (en) * | 1993-08-05 | 1995-02-21 | Matsushita Electric Ind Co Ltd | Dielectric resonator |
| CN1269913A (en) * | 1997-09-04 | 2000-10-11 | 株式会社村田制作所 | Multi-mode dielectric resonance device, dielectric filler, composite dielectric filler, synthesizer, distributor and communication equipment |
| EP1895615A1 (en) * | 2006-08-31 | 2008-03-05 | Matsushita Electric Industrial Co., Ltd. | Adjustable coupling |
| CN104393383A (en) * | 2014-12-09 | 2015-03-04 | 中国电子科技集团公司第五十四研究所 | Broad tuning coaxial electrically tunable filter and debugging method thereof |
| CN105048052A (en) * | 2015-07-08 | 2015-11-11 | 广东国华新材料科技股份有限公司 | Tunable dielectric resonator and dielectric filter |
| CN106486725A (en) * | 2015-09-01 | 2017-03-08 | 昇达科技股份有限公司 | Adjustable filter |
| CN207504151U (en) * | 2017-12-07 | 2018-06-15 | 南京乾波通信技术有限公司 | A kind of adjustable mechanical wave filter |
-
2017
- 2017-12-07 CN CN201711281597.1A patent/CN108091966A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0750503A (en) * | 1993-08-05 | 1995-02-21 | Matsushita Electric Ind Co Ltd | Dielectric resonator |
| CN1269913A (en) * | 1997-09-04 | 2000-10-11 | 株式会社村田制作所 | Multi-mode dielectric resonance device, dielectric filler, composite dielectric filler, synthesizer, distributor and communication equipment |
| EP1895615A1 (en) * | 2006-08-31 | 2008-03-05 | Matsushita Electric Industrial Co., Ltd. | Adjustable coupling |
| CN104393383A (en) * | 2014-12-09 | 2015-03-04 | 中国电子科技集团公司第五十四研究所 | Broad tuning coaxial electrically tunable filter and debugging method thereof |
| CN105048052A (en) * | 2015-07-08 | 2015-11-11 | 广东国华新材料科技股份有限公司 | Tunable dielectric resonator and dielectric filter |
| CN106486725A (en) * | 2015-09-01 | 2017-03-08 | 昇达科技股份有限公司 | Adjustable filter |
| CN207504151U (en) * | 2017-12-07 | 2018-06-15 | 南京乾波通信技术有限公司 | A kind of adjustable mechanical wave filter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10701823B1 (en) | 2019-02-25 | 2020-06-30 | Nokia Shanghai Bell Co., Ltd. | Enclosure for electronic components |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180529 |
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| WW01 | Invention patent application withdrawn after publication |