CN103518287A - Cavity filter - Google Patents
Cavity filter Download PDFInfo
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- CN103518287A CN103518287A CN201380000332.3A CN201380000332A CN103518287A CN 103518287 A CN103518287 A CN 103518287A CN 201380000332 A CN201380000332 A CN 201380000332A CN 103518287 A CN103518287 A CN 103518287A
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- screw rod
- sheet metal
- cavity
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Abstract
The invention relates to a cavity filter. The cavity filter comprises a cavity, which comprises a cavity wall and a cover plate covering on the cavity wall and slots are arranged thereon; at least two resonators which are arranged in the cavity for generation of syntony; an adjuster, which are arranged between the resonators and comprises a metal sheet, a supporting body and an adjusting screw rod. The metal sheet is driven to move up and down through rotation of the adjusting screw rod, the distances of the metal sheet to the resonators are changed, and therefore the capacitive coupling strength between the resonators is changed. Because that the metal sheet is snapped on the supporting body, the metal sheet cannot move left and right, and therefore the capacitive coupling strength between the resonators is controllable.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of cavity body filter.
Background technology
The cavity body filter of radio-frequency front-end, the resonance producing by the resonator in cavity carries out filtering, but has the problem of the design attitude that can not reach actual capacitively coupled zero point.Along with increasing that communication environment disturbs, cavity body filter is more and more higher to the requirement of Out-of-band rejection.If can not reach actual design attitude capacitively coupled zero point, can there is considerable influence to the power capacity of filter, edge loss and Out-of-band rejection, and then directly affect the batch productibility of filter.And, along with the volume requirement to radio-frequency filter is more and more less, the tolerance that filter processing is introduced to capacity coupled zero point performance impact also larger.Owing to realizing and optimizing difficulty, conventional capacitive coupling structure for filter is unadjustable, and adjustable capacitive coupling can improve performance of filter, improves the successful probability of disposable production.
Existing cavity body filter structure is: in housing, have resonant cavity, on the dividing wall between two capacity coupled non-adjacent coaxial resonant cavities of needs, open a slotted eye, in slotted eye, be provided with a tunable capacitor coupling assembly, this tunable capacitor coupling assembly comprises medium screw rod and sheet metal; Medium screw rod upper end is positioned at slotted eye by the fixing on the cover board ，Qi lower end of nut shim assembly, and sheet metal is fixed on medium screw rod lower end, and dividing wall downward bending are stretched out in the two ends of sheet metal.By adjusting nut gasket assembly, can make sheet metal move up and down, thus can control capacittance stiffness of coupling.But the shortcoming existing is: the tunable capacitor coupling assembly that medium screw rod lower end, sheet metal and slotted eye form, need between cover plate and cavity, move up and down, but in the time of debugging, rotary components, can drive assembly can rotate in the horizontal direction when moving up and down, therefore, make the adjusting of capacitive coupling intensity uncontrollable.
Summary of the invention
The embodiment of the present invention provides a kind of adjustable capacitive coupling body filter, has realized and both can regulate the capacitive coupling intensity between resonator, again can be so that controlled to the adjusting of capacitive coupling intensity.
In first aspect, the embodiment of the present invention provides a kind of cavity body filter, comprising:
Cavity, comprises cavity wall and covers the cover plate on described cavity wall, on described cover plate, has slotted eye;
At least two resonators, are contained in described cavity, for generation of resonance;
Adjuster, be contained between described resonator, comprise sheet metal, supporter and debugging screw rod, described supporter is fixed in described cavity, described sheet metal is elastic material, there is bow-shaped structural, described sheet metal is fastened on described supporter by the groove on described supporter, described cover plate is stretched out by described slotted eye in one end of described debugging screw rod, the other end withstands the bow-shaped structural part of described sheet metal, by regulating described debugging screw rod, drive one end of described sheet metal to move up and down distortion, change one end of described sheet metal and the distance between described resonator, thereby change the capacitive coupling intensity between the resonant cavity at described adjuster place.
According to first aspect, under the possible implementation of the first of first aspect, one end insulation that described debugging screw rod contacts with described sheet metal, for preventing short circuit.
The implementation possible according to the first of first aspect or first aspect, under the possible implementation of the second of first aspect, the bending of the two ends of described sheet metal, in order to increase stiffness of coupling.
In second aspect, the embodiment of the present invention provides a kind of cavity body filter, comprising:
Cavity, comprises cavity wall and covers the cover plate on described cavity wall, on described cover plate, has slotted eye;
At least two resonators, are contained in described cavity, for generation of resonance;
Adjuster, be contained between described resonator, comprise two sheet metals, supporter and debugging screw rod, described supporter is fixed in described cavity, described in any one, a side of sheet metal has bar tooth, the other end of arbitrary described sheet metal stretches into respectively in different resonant cavitys, on described debugging screw rod, there is gear hobbing, match with described tooth on sheet metal described in any one, make described two mutual short circuits of sheet metal, one side of described sheet metal tape tooth is fixed by described supporter, described cover plate is stretched out or is not stretched out in one end of described debugging screw rod by described slotted eye, by debugging described debugging screw rod, make the described gear hobbing on described debugging screw rod drive described two sheet metals left and right flexible, change the distance between described two sheet metals and described resonator, thereby change the capacitive coupling intensity between described resonator.
According to second aspect, under the possible implementation of the first of second aspect, described adjuster also comprises elastic component, described elastic component one end is fastened on described supporter, the other end props up described debugging screw rod, be used to described debugging screw rod that fastening force is upwards provided, prevent that described debugging screw rod from arbitrarily rotating.
The implementation possible according to the first of second aspect, under the possible implementation of the second of second aspect, described elastic component comprises spring.
According to second aspect, under the third possible implementation of second aspect, described debugging screw rod is provided with flat recess, for rotating described debugging screw rod.
According to second aspect, under the 4th kind of possible implementation of second aspect, one end bending that described two sheet metals do not contact with described debugging screw rod, in order to increase stiffness of coupling.
In the embodiment of the present invention, by screwing in or screw out debugging screw rod, making to debug screw rod drives the arc sheet metal being fastened on supporter to move up and down, or the gear hobbing that makes to debug on screw rod drives two sheet metal left and right with bar tooth to stretch, change the distance between sheet metal and resonator, realized thus and changed the capacitive coupling intensity between resonator, because arc sheet metal is fastened on supporter, while therefore debugging, arc sheet metal can not move left and right, or mate with the gear hobbing of screw rod owing to thering are two sheet metal one sides of bar tooth, opposite side is fixed on supporter, while therefore debugging, sheet metal can arbitrarily not move, thereby make the capacitive coupling intensity between resonator controlled.
Accompanying drawing explanation
The cavity body filter structural representation that Fig. 1 provides for the embodiment of the present invention one;
The cavity body filter perspective view that Fig. 2 provides for the embodiment of the present invention two;
Adjuster schematic diagram in the cavity body filter that Fig. 3 provides for the embodiment of the present invention two.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
For the defect of prior art, the embodiment of the present invention provides a kind of cavity body filter, both can regulate the capacitive coupling intensity between resonator, again can be so that controlled to the adjusting of capacitive coupling intensity.
What following embodiment described is a kind of adjustable capacitive coupling body filter, by rotation, debugging screw rod drives sheet metal to move up and down distortion, change the distance between sheet metal and resonator, thereby the capacitive coupling intensity between change resonator, and because sheet metal is fastened on supporter, therefore, sheet metal can not move left and right, thereby makes the capacitive coupling intensity between resonator controlled.
The cavity body filter structural representation that Fig. 1 provides for the embodiment of the present invention one.The perspective view that figure in Fig. 1 (a) is cavity body filter, the figure in Fig. 1 (b) is the schematic diagram of adjuster in cavity body filter.As shown in Figure 1, the cavity body filter that the embodiment of the present invention provides comprises:
At least two resonators 23, are contained in described cavity 21, for generation of resonance;
Adjuster, is contained between described resonator 23, for regulating the stiffness of coupling between described resonator 23.
Figure from Fig. 1 (b) can find out, described adjuster comprises sheet metal 25, supporter 24 and debugging screw rod 26, described sheet metal 25 is elastic material, there is bow-shaped structural, by the groove on described supporter 24, be fastened on described supporter on 24, described debugging screw rod 26 stretches out described cover plate 22 by described slotted eye 22-1 in one end, the other end withstands the bow-shaped structural part of described sheet metal 25, by regulating (can be to screw in or screw out) described debugging screw rod 26, (sheet metal can adopt the material of excellent spring to make to drive described sheet metal 25 one end to move up and down distortion, make it have upper and lower deformation space), change the distance between described sheet metal 25 one end and described resonator, thereby change the capacitive coupling intensity between described resonator.
Wherein, one end insulation that described debugging screw rod 26 contacts with described sheet metal 25, prevents its contact metal film 25 ground short circuit afterwards.Optionally, between debugging screw rod 26 and described sheet metal 25, increase insulator 28 or coat insulating material, for preventing that debugging screw rod 26 contacts ground short circuit afterwards with sheet metal 25.
Preferably, the bending of the two ends of described sheet metal, in order to increase stiffness of coupling.
Alternatively, described adjuster can also comprise clamp nut 27, and for fixing described debugging screw rod 26,, after having debugged, it is locked on cover plate 22 that available clamp nut 27 will be debugged screw rod 26, guarantees that its assembling is reliable.
What above-described embodiment was described is a kind of cavity body filter with adjuster, by rotation, debugging screw rod 26 drives sheet metal 25 to move up and down, change the distance between described sheet metal 25 and described resonator 23, thereby change the capacitive coupling intensity of 23 of described resonator, and because sheet metal 25 is fastened on supporter 24, therefore, sheet metal 25 can not move left and right, thereby makes the capacitive coupling intensity between resonator 23 controlled.
What following embodiment described is the another kind of cavity body filter with adjuster, by the described gear hobbing on debugging screw rod, drive described two sheet metals left and right flexible, change the distance between sheet metal and resonator, change thus the capacitive coupling intensity between resonator, and sheet metal is fastened on supporter, therefore, two sheet metals can arbitrarily not move, thereby make the capacitive coupling intensity between resonator controlled.
The cavity body filter perspective view that Fig. 2 provides for the embodiment of the present invention two.As shown in Figure 2, the cavity body filter that the embodiment of the present invention provides comprises:
At least two resonators 33, are contained in described cavity 31, for generation of resonance;
Adjuster, is contained between described resonator 33, for regulating the stiffness of coupling between described resonator 33.
Adjuster schematic diagram in the cavity body filter that Fig. 3 provides for the embodiment of the present invention two.The decomposing schematic representation that figure in Fig. 3 (a) is adjuster.As shown in the figure in Fig. 3 (a), described adjuster comprises that sheet metal 35(comprises two, be 35-1 and 35-2), supporter 34(comprises upper and lower two parts, be 34-1 and 34-2) and debugging screw rod 36, a side of described sheet metal 35-1 and 35-2 has bar tooth 39, opposite side stretches into respectively in different resonant cavitys, as shown in Figure 3, and a side of described sheet metal 35-1 and 35-2 tape tooth by described supporter, fix (can be fastened on the latter half 34-2 of described supporter by the groove on supporter 34).Figure in Fig. 3 (b) is adjuster combination schematic diagram.As shown in figure (b), on described debugging screw rod 36, there is gear hobbing 36-1, match with the bar tooth 39 on two sheet metal 35-1 and 35-2, make the mutual short circuit of two sheet metal 35-1 and 35-2 form one, described debugging screw rod 36 stretches out or does not stretch out described cover plate 32 by described slotted eye 32-1 in one end, by regulating (can be to screw in or screw out) described debugging screw rod 36, make the described gear hobbing 36-1 on described debugging screw rod 36, drive two sheet metal 35-1 and 35-2 left and right flexible, change the distance between described two sheet metals and described resonator, thereby change the capacitive coupling intensity between described resonator.
Wherein, when rotation is during described debugging screw rod 36, two sheet metal 35-1 and 35-2 are flexible in the opposite direction.Particularly, as shown in figure (b), when turning clockwise debugging screw rod 36, the gear hobbing 36-1 of debugging on screw rod 36 can with sheet metal 35-1 on bar tooth match, and sheet metal 35-1 is moved to the left, change sheet metal 35-1 and left side resonator 33(referring to Fig. 2) between distance, equally, the gear hobbing 36-1 of debugging on screw rod 36 also can with sheet metal 35-2 on bar tooth match, and sheet metal 35-2 is moved right, change sheet metal 35-2 and right side resonator 33(referring to Fig. 2) between distance, thereby change two capacitive coupling intensity between resonator 33.When being rotated counterclockwise debugging screw rod 36, debugging screw rod 36 can drive sheet metal 35-1 to move right, and drives sheet metal 35-2 to be moved to the left, and principle is the same, at this, does not repeat again.
Alternatively, described adjuster can also comprise elastic component 37, and elastic component 37 one end are fastened on described supporter 34, and the other end props up described debugging screw rod 36, is used to described debugging screw rod 36 that fastening force is upwards provided, and prevents that described debugging screw rod 36 from arbitrarily rotating.
Preferably, described elastic component can be spring.
Debugging screw rod 36 shown in Fig. 2 does not stretch out slotted eye 32-1, therefore, on debugging screw rod 36, flat recess 36-2 can be set, for rotating debugging screw rod 36.Those skilled in the art can make to debug screw rod 36 and stretch out cover plate 32 by slotted eye 32-1 according to actual needs, thereby can directly rotate debugging screw rod 36 by hand.
Preferably, one end bending that two sheet metal 35-1 and 35-2 do not contact with described debugging screw rod 36, in order to increase stiffness of coupling.
In the embodiment of the present invention, by screwing in or screw out debugging screw rod, the gear hobbing that makes to debug on screw rod drives sheet metal left and right flexible, change the distance between sheet metal and resonator, realized thus and changed the capacitive coupling intensity between resonator, and therefore sheet metal is fastened on supporter,, sheet metal can arbitrarily not moved, thereby make the capacitive coupling intensity between resonator controlled.
Professional should further recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software is clearly described, composition and the step of each example described according to function in the above description in general manner.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can specifically should be used for realizing described function with different device to each, but this realization should not thought and exceeds scope of the present invention.
The software module that the device of describing in conjunction with embodiment disclosed herein or the step of algorithm can use hardware, processor to carry out, or the combination of the two is implemented.Software module can be placed in the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection range being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a cavity body filter, is characterized in that, described cavity body filter comprises:
Cavity, comprises cavity wall and covers the cover plate on described cavity wall, on described cover plate, has slotted eye;
At least two resonators, are contained in described cavity, for generation of resonance;
Adjuster, be contained between described resonator, comprise sheet metal, supporter and debugging screw rod, described supporter is fixed in described cavity, described sheet metal is elastic material, there is bow-shaped structural, described sheet metal is fastened on described supporter by the groove on described supporter, described cover plate is stretched out by described slotted eye in one end of described debugging screw rod, the other end withstands the bow-shaped structural part of described sheet metal, by regulating described debugging screw rod, drive one end of described sheet metal to move up and down distortion, change one end of described sheet metal and the distance between described resonator, thereby change the capacitive coupling intensity between described resonator.
2. cavity body filter as claimed in claim 1, is characterized in that, one end insulation that described debugging screw rod contacts with described sheet metal, for preventing short circuit.
3. cavity body filter as claimed in claim 1 or 2, is characterized in that, the two ends bending of described sheet metal, in order to increase stiffness of coupling.
4. a cavity body filter, is characterized in that, described cavity body filter comprises:
Cavity, comprises cavity wall and covers the cover plate on described cavity wall, on described cover plate, has slotted eye;
At least two resonators, are contained in described cavity, for generation of resonance;
Adjuster, be contained between described resonator, comprise two sheet metals, supporter and debugging screw rod, described supporter is fixed in described cavity, described in any one, a side of sheet metal has bar tooth, the other end of arbitrary described sheet metal stretches into respectively in different resonant cavitys, on described debugging screw rod, there is gear hobbing, match with described tooth on sheet metal described in any one, make described two mutual short circuits of sheet metal, one side of described sheet metal tape tooth is fixed by described supporter, described cover plate is stretched out or is not stretched out in one end of described debugging screw rod by described slotted eye, by debugging described debugging screw rod, make the described gear hobbing on described debugging screw rod drive described two sheet metals left and right flexible, change the distance between described two sheet metals and described resonator, thereby change the capacitive coupling intensity between described resonator.
5. cavity body filter as claimed in claim 4, it is characterized in that, described adjuster also comprises elastic component, described elastic component one end is fastened on described supporter, the other end props up described debugging screw rod, be used to described debugging screw rod that fastening force is upwards provided, prevent that described debugging screw rod from arbitrarily rotating.
6. cavity body filter as claimed in claim 5, is characterized in that, described elastic component comprises spring.
7. cavity body filter as claimed in claim 4, is characterized in that, described debugging screw rod is provided with flat recess, for rotating described debugging screw rod.
8. cavity body filter as claimed in claim 4, is characterized in that, one end bending that described two sheet metals do not contact with described debugging screw rod, in order to increase stiffness of coupling.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013074845 | 2013-04-27 |
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| Publication Number | Publication Date |
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| CN103518287A true CN103518287A (en) | 2014-01-15 |
| CN103518287B CN103518287B (en) | 2016-05-18 |
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| CN201380000332.3A Active CN103518287B (en) | 2013-04-27 | 2013-04-27 | Cavity body filter |
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Cited By (11)
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| CN104037479A (en) * | 2014-05-27 | 2014-09-10 | 京信通信系统（中国）有限公司 | Cavity coupling structure |
| CN106058397A (en) * | 2015-04-13 | 2016-10-26 | Ace技术株式会社 | Cavity filter using cross-coupling |
| WO2017002031A1 (en) * | 2015-06-30 | 2017-01-05 | Alcatel-Lucent Shanghai Bell Co.,Ltd | Cavity resonator device with a coupling element |
| CN106463808A (en) * | 2014-03-26 | 2017-02-22 | 上海贝尔股份有限公司 | Adjustable phase-inverting coupling loop |
| WO2017113222A1 (en) * | 2015-12-30 | 2017-07-06 | 深圳市大富科技股份有限公司 | Tm mode dielectric filter, and communication radio frequency device |
| CN107394327A (en) * | 2017-08-24 | 2017-11-24 | 江苏贝孚德通讯科技股份有限公司 | Coupled structure and its stiffness of coupling adjusting method, a kind of communication headend equipment part |
| CN108370076A (en) * | 2015-12-08 | 2018-08-03 | 华为技术有限公司 | The cross coupling device and filter of filter |
| CN110400997A (en) * | 2019-07-15 | 2019-11-01 | 武汉凡谷电子技术股份有限公司 | A kind of frequency tuning devices and filter, duplexer |
| CN113594651A (en) * | 2021-07-06 | 2021-11-02 | 大富科技(安徽)股份有限公司 | Capacitive coupling structure of cavity filter and communication equipment |
| CN114407947A (en) * | 2022-01-19 | 2022-04-29 | 中车青岛四方机车车辆股份有限公司 | Railway vehicle floor and railway vehicle |
| CN117578053A (en) * | 2024-01-17 | 2024-02-20 | 成都宇恒博电子科技有限公司 | Cavity filter capable of reducing out-of-band rejection of filter |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106463808B (en) * | 2014-03-26 | 2021-12-31 | 上海贝尔股份有限公司 | Adjustable reverse phase coupling loop |
| CN106463808A (en) * | 2014-03-26 | 2017-02-22 | 上海贝尔股份有限公司 | Adjustable phase-inverting coupling loop |
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| CN106058397A (en) * | 2015-04-13 | 2016-10-26 | Ace技术株式会社 | Cavity filter using cross-coupling |
| CN106058397B (en) * | 2015-04-13 | 2019-11-12 | Ace技术株式会社 | Utilize cross-linked cavity body filter |
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| CN108370076A (en) * | 2015-12-08 | 2018-08-03 | 华为技术有限公司 | The cross coupling device and filter of filter |
| WO2017113222A1 (en) * | 2015-12-30 | 2017-07-06 | 深圳市大富科技股份有限公司 | Tm mode dielectric filter, and communication radio frequency device |
| CN107394327A (en) * | 2017-08-24 | 2017-11-24 | 江苏贝孚德通讯科技股份有限公司 | Coupled structure and its stiffness of coupling adjusting method, a kind of communication headend equipment part |
| CN110400997A (en) * | 2019-07-15 | 2019-11-01 | 武汉凡谷电子技术股份有限公司 | A kind of frequency tuning devices and filter, duplexer |
| CN110400997B (en) * | 2019-07-15 | 2021-07-06 | 武汉凡谷电子技术股份有限公司 | Frequency tuning device, filter and duplexer |
| CN113594651A (en) * | 2021-07-06 | 2021-11-02 | 大富科技(安徽)股份有限公司 | Capacitive coupling structure of cavity filter and communication equipment |
| CN114407947A (en) * | 2022-01-19 | 2022-04-29 | 中车青岛四方机车车辆股份有限公司 | Railway vehicle floor and railway vehicle |
| CN117578053A (en) * | 2024-01-17 | 2024-02-20 | 成都宇恒博电子科技有限公司 | Cavity filter capable of reducing out-of-band rejection of filter |
| CN117578053B (en) * | 2024-01-17 | 2024-03-29 | 成都宇恒博电子科技有限公司 | Cavity filter for improving out-of-band rejection performance of filter |
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| CN103518287B (en) | 2016-05-18 |
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