CN205944360U - Cavity band elimination filter - Google Patents
Cavity band elimination filter Download PDFInfo
- Publication number
- CN205944360U CN205944360U CN201620708167.8U CN201620708167U CN205944360U CN 205944360 U CN205944360 U CN 205944360U CN 201620708167 U CN201620708167 U CN 201620708167U CN 205944360 U CN205944360 U CN 205944360U
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- China
- Prior art keywords
- cavity
- protuberance
- microstripline
- bandstop filter
- plate
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Abstract
The utility model discloses a cavity band elimination filter includes: wave filter cavity, microstripline board and apron, the apron closing cap the wave filter cavity forms the resonant cavity, be equipped with the resonance post in the resonant cavity, the microstripline board is located the apron with between the wave filter cavity, adjacent resonant cavity is separated through keeping apart the muscle to the wave filter cavity, wherein, the protruding portion has in the isolation muscle, the microstripline board has the constant head tank, the constant head tank with the protruding portion is corresponding, the protruding portion card is located in the constant head tank. The embodiment of the utility model provides an owing to utilize protruding portion and constant head tank to advance line location to the microstripline board to the positioning accuracy of microstripline board has been improved, consequently, the uniformity of cavity filter production and the stability of the high low temperature vibrations circumstances can be effectively guaranteed.
Description
【Technical field】
The utility model is related to communication radio frequency technical field, particularly to a kind of cavity bandstop filter.
【Background technology】
Wave filter is widely used in various GSMs, for filtering the clutter outside communication signal frequency or interference
Signal.According to function classification, wave filter includes bandpass filter, bandstop filter, low pass filter and high-pass filter.Compare
Compared with other wave filters, bandstop filter has broadband, high suppression, low-loss feature.
Fig. 1 shows the structure of cavity bandstop filter in prior art.The primary structure bag of this cavity bandstop filter
Include：Filter cavity 101, microstripline plate 102, cover plate 103.Cover plate 103 capping filter cavity 101 forms resonator, micro-
Band wiring board 102 is located between cover plate 103 and resonant column, and microstripline plate 102 has microstrip line work near resonant column one side
For transmission main and realize the tap coupler with resonant column.
In the research process to prior art, it was discovered by researchers that there is problems with above-mentioned prior art：Micro-strip
Wiring board 102 is contained in filter cavity 101 by gap cooperation, on the one hand due to the presence of mismachining tolerance, microstripline
There is deviation position in filter cavity 101 for the plate 102, can directly result in the change of microstrip line and resonant column tap coupler, make
Become to produce and larger inconsistency during debugging；On the other hand, under high/low temperature and shock conditions, microstripline plate 102 is relatively
In original position, there is change, product parameters change.
Therefore, it is badly in need of a kind of cavity bandstop filter solving microstripline plate deviations.
Therefore it is necessary to a kind of new technical scheme is proposed, to solve above-mentioned technical problem.
【Utility model content】
The purpose of this utility model is to provide a kind of cavity bandstop filter, and it can effectively improve determining of microstripline plate
Position precision, can effectively ensure that the uniformity of cavity body filter production and the stability of high/low temperature shock conditions.
For solving the above problems, the technical solution of the utility model is as follows：
The utility model provides a kind of cavity bandstop filter, and described cavity bandstop filter includes：Filter cavity,
Microstripline plate and cover plate, described cover plate covers described filter cavity and forms resonator, is provided with resonance in described resonator
Post, described microstripline plate is located between described cover plate and described filter cavity, and described filter cavity is divided by isolation bar
Every adjacent resonators；Wherein, in described isolation bar, there is protuberance, described microstripline plate has locating slot, described locating slot
Corresponding with described protuberance, described protuberance is arranged in described locating slot.
Preferably, described microstripline plate is located above described resonant column, and has spacing with described resonant column.
Preferably, described cover plate has escape groove, and described escape groove is corresponding with described protuberance.
Preferably, described protuberance is higher than described isolation bar.
Preferably, described protuberance is higher than described isolation bar 1.5mm.
Preferably, the width of the locating slot of described microstripline plate is more than the thickness of described protuberance.
Preferably, the width of the locating slot of described microstripline plate be more than the scope of the thickness of described protuberance 0.1～
0.2mm.
Preferably, described escape groove and described protuberance have spacing.
Preferably, described escape groove and the spacing of described protuberance are in more than 1mm.
Preferably, described protuberance is set in all of isolation bar, or, arrange in the isolation bar of a portion
Described protuberance.
Hinge structure, the cavity bandstop filter that the utility model provides includes：Filter cavity, microstripline plate
And cover plate, described cover plate covers described filter cavity and forms resonator, is provided with resonant column, described micro-strip in described resonator
Wiring board is located between described cover plate and described filter cavity, and described filter cavity separates adjacent resonance by isolation bar
Chamber；Wherein, in described isolation bar, there is protuberance, described microstripline plate has locating slot, described locating slot is prominent with described
Portion is corresponding, and described protuberance is arranged in described locating slot.The utility model embodiment is due to using protuberance and locating slot
Microstripline plate being positioned, thus improve the positioning precision of microstripline plate, therefore, can effectively ensure that cavity body filter
The uniformity producing and the stability of high/low temperature shock conditions.
It is that the above of the present utility model can be become apparent, preferred embodiment cited below particularly, and coordinate institute's accompanying drawing
Formula, is described in detail below.
【Brief description】
The decomposing schematic representation of the cavity bandstop filter that Fig. 1 provides for prior art；
The single-chamber cross-sectional view of the cavity bandstop filter that Fig. 2 provides for the utility model embodiment；
The decomposition plan view of the cavity bandstop filter that Fig. 3 provides for the utility model embodiment；
The decomposing schematic representation of the cavity bandstop filter that Fig. 4 provides for the utility model embodiment.
【Specific embodiment】
The word " embodiment " that this specification is used means serving as example, example or illustration.Additionally, this specification and institute
Article " one " used in attached claim usually can be interpreted to mean " one or more ", unless otherwise or
Understand guiding singulative from context.
In order to technical scheme described in the utility model is described, to illustrate below by specific embodiment.
See also Fig. 2, Fig. 3 and Fig. 4, the structure of the cavity bandstop filter providing for the utility model embodiment is shown
It is intended to.For convenience of description, illustrate only the part related to the utility model embodiment.
Described cavity bandstop filter includes：Filter cavity 201, microstripline plate 204 and cover plate 205, described lid
Plate 205 covers described filter cavity 201 and forms resonator 202, is provided with resonant column 203, described microstrip line in described resonator
Road plate 204 is located between described cover plate 205 and described filter cavity 201, and is located above resonant column 203 and humorous with described
The post 203 that shakes has spacing.Microstripline plate 204 has microstrip line in the one side near resonant column 203, and this microstrip line is as transmission
Mobile jib simultaneously realizes the tap coupler with resonant column 203.
Described filter cavity 201 separates adjacent resonators by isolation bar.Wherein, in described isolation bar, there is protuberance
301, this protuberance 301 positions in order to microstripline plate 204.It is understood, however, that can be in all of isolation bar
Described protuberance 301 is set, or, described protuberance 301 is set in the isolation bar of a portion, as long as residence can be positioned
State microstripline plate 204.
Described microstripline plate 204 has locating slot 302, and described locating slot 302 is corresponding with described protuberance 301, institute
State protuberance 301 to be arranged in described locating slot 302, with fixing described microstripline plate 204, in addition, described locating slot 302 is not
The cabling of microstrip line in impact microstripline plate 204.
Described cover plate 205 has escape groove 303, and described escape groove is corresponding with described protuberance, described escape groove 303 with
Described protuberance 301 has spacing, to ensure that described cover plate 205 and described protuberance 301 have spacing it is ensured that described cover plate
205 make a circle screws only outer with filter cavity 201 are closely connected.
In the present embodiment, have 3 isolation bars and there is protuberance 301, microstripline plate 204 has 3 locating slots
302.In the case that in microstripline plate 204, microstrip line cabling allows, microstripline plate 204 can have several locating slots
302, can there is the protuberance 301 of respective amount position in the isolation bar of filter cavity 201.
Preferably, described protuberance 301 is higher than isolation bar, and for example, described protuberance 301 is higher than isolation bar 1.5mm.
Preferably, the width of the locating slot 302 of described microstripline plate is more than the thickness of described protuberance 301, for example, institute
State the locating slot 302 of microstripline plate width be more than described protuberance 301 thickness scope in 0.1～0.2mm, to realize
Being accurately positioned of microstripline plate.
Preferably, described escape groove 303 depth is 2mm, and width is 4mm, described escape groove 303 monolateral with described protuberance
301 have the gap more than 1.2mm, and experiment finds：Ensure that escape groove 303 can effectively improve in the spacing of more than 1mm with protuberance
Wave filter intermodulation index.Further, described escape groove 303 has fillet, in order to process.
In sum, the cavity bandstop filter that the utility model embodiment provides includes：Filter cavity, microstripline
Plate and cover plate, described cover plate covers described filter cavity and forms resonator, is provided with resonant column in described resonator, described micro-
Band wiring board is located between described cover plate and described filter cavity, and described filter cavity separates adjacent resonance by isolation bar
Chamber；Wherein, in described isolation bar, there is protuberance, described microstripline plate has locating slot, described locating slot is prominent with described
Portion is corresponding, and described protuberance is arranged in described locating slot.The utility model embodiment is due to using protuberance and locating slot
Microstripline plate being positioned, thus improve the positioning precision of microstripline plate, therefore, can effectively ensure that cavity body filter
The uniformity producing and the stability of high/low temperature shock conditions.
Although illustrate and describing the utility model, art technology with respect to one or more implementations
Personnel will be appreciated that equivalent variations and modification based on to the reading of the specification and drawings and understanding.The utility model includes owning
Such modification and modification, and be limited only by the scope of the following claims.Each particularly with executed by said modules
Kind of function, the term for describing such assembly is intended to that (for example it is in function corresponding to the specified function of executing described assembly
On be of equal value) random component (unless otherwise instructed), even if in structure with execute the showing of this specification shown in this article
The open structure of the function in plasticity implementation is not equal to.If although additionally, the special characteristic of this specification with respect to
Only one in dry implementation is disclosed, but this feature can with can be such as expectation for given or application-specific
Other combinations of features one or more with other favourable implementations.And, with regard to term " inclusion ", " having ", " containing "
Or for its deformation is used in specific embodiment or claim, such term is intended to similar to term "comprising"
Mode includes.
In sum although the utility model is disclosed above with preferred embodiment, but above preferred embodiment is not used
To limit the utility model, those of ordinary skill in the art, without departing from spirit and scope of the present utility model, all can make
Various changes and retouching, protection domain therefore of the present utility model is defined by the scope that claim defines.
Claims (10)
1. a kind of cavity bandstop filter is it is characterised in that described cavity bandstop filter includes：Filter cavity, microstrip line
Road plate and cover plate, described cover plate covers described filter cavity and forms resonator, is provided with resonant column in described resonator, described
Microstripline plate is located between described cover plate and described filter cavity, and described filter cavity is separated adjacent humorous by isolation bar
Shake chamber；Wherein, in described isolation bar, there is protuberance, described microstripline plate has locating slot, described locating slot is prominent with described
Go out portion corresponding, described protuberance is arranged in described locating slot.
2. cavity bandstop filter according to claim 1 is it is characterised in that described microstripline plate is located at described resonance
Above post, and with described resonant column, there is spacing.
3. cavity bandstop filter according to claim 1 is it is characterised in that described cover plate has escape groove, described keeps away
Make groove corresponding with described protuberance.
4. cavity bandstop filter according to claim 1 is it is characterised in that described protuberance is higher than described isolation bar.
5. cavity bandstop filter according to claim 4 is it is characterised in that described protuberance is higher than described isolation bar
1.5mm.
6. cavity bandstop filter according to claim 1 is it is characterised in that the width of the locating slot of described microstripline plate
Degree is more than the thickness of described protuberance.
7. cavity bandstop filter according to claim 6 is it is characterised in that the width of the locating slot of described microstripline plate
Degree is more than the scope of the thickness of described protuberance in 0.1～0.2mm.
8. cavity bandstop filter according to claim 3 is it is characterised in that described escape groove is had with described protuberance
Spacing.
9. cavity bandstop filter according to claim 8 is it is characterised in that between described escape groove and described protuberance
Away from more than 1mm.
10. cavity bandstop filter according to claim 1 is it is characterised in that arrange described in all of isolation bar
Protuberance, or, described protuberance is set in the isolation bar of a portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620708167.8U CN205944360U (en) | 2016-07-06 | 2016-07-06 | Cavity band elimination filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620708167.8U CN205944360U (en) | 2016-07-06 | 2016-07-06 | Cavity band elimination filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205944360U true CN205944360U (en) | 2017-02-08 |
Family
ID=57927845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620708167.8U Active CN205944360U (en) | 2016-07-06 | 2016-07-06 | Cavity band elimination filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224209A (en) * | 2019-03-28 | 2019-09-10 | 广东通宇通讯股份有限公司 | A kind of two-way fabrication formula filter |
-
2016
- 2016-07-06 CN CN201620708167.8U patent/CN205944360U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224209A (en) * | 2019-03-28 | 2019-09-10 | 广东通宇通讯股份有限公司 | A kind of two-way fabrication formula filter |
| CN110224209B (en) * | 2019-03-28 | 2024-02-20 | 广东通宇通讯股份有限公司 | Two-way sheet metal type filter |
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