CN205921058U - Cavity filter - Google Patents
Cavity filter Download PDFInfo
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- CN205921058U CN205921058U CN201620683543.2U CN201620683543U CN205921058U CN 205921058 U CN205921058 U CN 205921058U CN 201620683543 U CN201620683543 U CN 201620683543U CN 205921058 U CN205921058 U CN 205921058U
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- resonant column
- cavity
- body filter
- cavity body
- filter according
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Abstract
The utility model discloses a cavity filter, cavity filter includes cavity, apron, the apron closing cap the cavity forms the resonant cavity, be equipped with the resonance post in the resonant cavity, it flies the pole to be fixed with on the dividing wall between the resonant cavity, the resonance post with it is the plane to fly the corresponding side of pole. The utility model discloses because the resonance post with it is the plane to fly the corresponding side of pole, consequently can form great capacitance coupling to increase substantially the cross coupling volume between the resonant cavity.
Description
[technical field]
This utility model is related to communications component technology field, particularly to a kind of cavity body filter.
[background technology]
Cavity body filter is widely used in the communications field as a kind of frequency selection device, completes signal in communication system
In the base station of transmitting and reception, cavity body filter is used for selecting signal of communication, filters the clutter or dry outside communication signal frequency
Disturb signal.
In order to improve the performance of cavity body filter Out-of-band rejection, cavity body filter generally requires to add in its transmission characteristic
Transmission zero, and transmission zero physically typically to be realized by cross-couplings, cross-couplings have various ways, and one of which is
Realize the capacitive cross coupling needing using winged bar.This cavity body filter includes cavity, cover plate (sign), described cover plate envelope
Cover described cavity and form resonator cavity.Resonance intracavity is provided with resonant column, and the dividing wall between resonator cavity is fixed with winged bar, winged bar with
Form capacitive cross coupling between the side wall of resonant column.The capacitance that capacity plate antenna is formed increases with two-plate spacing and becomes
Little, because resonant column is cylindrical, the capacitance that winged bar is formed with resonant column is less, and winged bar needs and resonant column ensures necessarily
Safe distance, therefore the coupling amount that can reach is limited.In some special wave filter design requirements, need realization very strong
Capacitive cross coupling, is difficult to meet design requirement with this conventional coupled structure.
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 of the cross-couplings amount that can effectively improve between resonator cavity to filter
Ripple device,
For solving the above problems, the technical solution of the utility model is as follows:
This utility model provides a kind of cavity body filter, and described cavity body filter includes cavity, cover plate, described cover plate envelope
Cover described cavity and form resonator cavity, described resonance intracavity is provided with resonant column, the dividing wall between described resonator cavity is fixed with winged
Bar, the described resonant column side corresponding with described winged bar is plane.
Preferably, described resonant column includes first end and the second end, and the first end of described resonant column and cavity bottom are fixed
Connect, the second end of described resonant column is provided with an opening, and relative with described cover plate.
Preferably, the disk that described winged bar is included the connecting rod being connected with described dividing wall and is located at described connecting rod both sides
Portion.
Preferably, the described resonant column side corresponding with described winged bar is parallel with described winged rod end surface.
Preferably, described resonant column is parallel with described round plate with the corresponding side of described winged bar.
Preferably, described resonant column is polygon cylinder.
Preferably, described resonant column is square resonant column, pentagon resonant column or hexagon resonant column.
Preferably, the opening that the second end of described resonant column is provided with is circular hole.
Preferably, described resonant column and described cavity are formed in one.
Hinge structure, the cavity body filter that this utility model provides, described cavity body filter includes cavity, cover plate,
Described cover plate covers described cavity and forms resonator cavity, and described resonance intracavity is provided with resonant column, the dividing wall between described resonator cavity
On be fixed with winged bar, the described resonant column side corresponding with described winged bar be plane.Due to described resonant column and described winged bar
Corresponding side is plane, therefore can form larger Capacitance Coupled, thus increasing substantially the intersection coupling between resonator cavity
Resultant.Solve the little technical problem of cross coupling strength between existing cavity body filter resonator cavity.
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 cross-sectional view of the cavity body filter that Fig. 1 provides for this utility model embodiment；
The perspective view of the cavity body filter that Fig. 2 provides for this utility model embodiment；
The perspective view of the cavity body filter that Fig. 3 provides for another embodiment of this utility model.
[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.
Embodiment one
See also Fig. 1 and Fig. 2, the structural representation of the cavity body filter providing for this utility model embodiment.For
It is easy to illustrate, illustrate only the part related to this utility model embodiment.
Cavity body filter includes: cavity 210, cover plate (sign), and described cover plate covers described cavity 210 and forms resonance
Chamber, described resonance intracavity is provided with resonant column 220, and described resonant column 220 includes first end and the second end, described resonant column 220
First end is fixedly connected with cavity 210 bottom, and the second end of described resonant column 220 is provided with an opening, and relative with cover plate；Described
Winged bar 230 is fixed with the dividing wall between resonator cavity, described winged bar 230 includes the connecting rod 231 being connected with described dividing wall
With the round plate 232 positioned at described connecting rod 231 both sides.Shape between the round plate 232 of winged bar 230 and the side wall of resonant column 220
Become capacitive cross coupling, the diameter of length and round plate 232 by adjusting connecting rod 231 can adjust cross-couplings amount.
In this utility model embodiment, described resonant column 220 side corresponding with described winged bar 230 is plane；Institute
State resonant column 220 side corresponding with described winged bar 230 parallel with winged bar 230 end face, particularly as follows: described resonant column 220 with
The corresponding side of described winged bar 230 is parallel with the described round plate 232 of winged bar, therefore increases efficient coupling area, makes described
Winged bar 230 has the larger coefficient of coup.
As this utility model one preferred embodiment, described resonant column 220 is polygon cylinder.This is humorous in the present embodiment
The post 220 that shakes is square resonant column, it is contemplated that resonant column 220 corresponds to multiple winged bars 230 in other possible embodiments, because
This, resonant column 220 can be pentagon resonant column or hexagon resonant column.The shape of this resonant column 220 can be entered according to actual requirement
Row sets.
In this utility model embodiment, the opening that the second end of described resonant column 220 is provided with, for example, in resonant column
220 the second end opens up a circular hole, so that tuning screw deeply enters line frequency and adjusts, described resonant column 220 is permissible with cavity 210
It is formed in one or die cast.
Embodiment two
Refer to Fig. 3, the structural representation of the cavity body filter providing for this utility model embodiment.For the ease of saying
Bright, illustrate only the part related to this utility model embodiment.
Cavity body filter includes: cavity 410, cover plate (sign), and described cover plate covers described cavity 410 and forms resonance
Chamber, in the present embodiment, described cover plate covers described cavity 410 and forms three resonator cavitys, and described resonance intracavity is provided with resonant column
420, described resonant column 420 includes first end and the second end, and the first end of described resonant column 420 is fixing with cavity 410 bottom even
Connect, the second end of described resonant column 420 is provided with an opening, and relative with cover plate；Fixing on dividing wall between described resonator cavity
There is winged bar 430, the disk that described winged bar 430 is included the connecting rod being connected with described dividing wall and is located at described connecting rod both sides
Portion.Form capacitive cross coupling, by adjusting the length of connecting rod between the round plate of winged bar 430 and the side wall of resonant column 420
Cross-couplings amount can be adjusted with the diameter of round plate.
In the present embodiment, described resonant column 420 and two winged bars 430 form capacitive cross coupling.430 points of two winged bars
Bar Wei not flown by the first winged bar and second, described resonant column 420 is polygon resonant column, and resonant column and first flies the corresponding side of bar
422 parallel with the round plate 431 that first flies bar to form Capacitance Coupled, resonant column and the second winged corresponding side of bar 421 and the
Two fly bars round plate 432 parallel to form Capacitance Coupled.Described resonant column 420 is added by machine or die cast.
In this utility model embodiment, described resonant column 420 side corresponding with described winged bar 430 is plane；Institute
State resonant column 420 parallel with the end face (as round plate) of described winged bar 430 with the corresponding side of described winged bar 430, therefore increase
Efficient coupling area, makes the described winged bar 430 have the larger coefficient of coup.
It is understood, however, that the number of the resonator cavity being formed can be set according to the actual requirements.It is not limited to reality
Apply three resonator cavitys in two resonator cavitys or the embodiment two in example one.The round plate of described winged bar 430 can also be other
The end face of shape.
In sum, the cavity body filter that this utility model embodiment provides, described cavity body filter includes cavity, lid
Plate, described cover plate covers described cavity and forms resonator cavity, and described resonance intracavity is provided with resonant column, the isolation between described resonator cavity
Winged bar is fixed with wall, the described resonant column side corresponding with described winged bar is plane.Because described resonant column is flown with described
The corresponding side of bar is plane, therefore can form larger Capacitance Coupled, thus increasing substantially the intersection between resonator cavity
Coupling amount.Solve the little technical problem of cross coupling strength between existing cavity body filter resonator cavity.
Although illustrate and describing this 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.This 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 this utility model is disclosed above with preferred embodiment, but above preferred embodiment is not used
To limit this 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 (9)
1., it is characterised in that described cavity body filter includes cavity, cover plate, described cover plate capping is described for a kind of cavity body filter
Cavity forms resonator cavity, and described resonance intracavity is provided with resonant column, the dividing wall between described resonator cavity is fixed with winged bar, described
The resonant column side corresponding with described winged bar is plane.
2. cavity body filter according to claim 1 is it is characterised in that described resonant column includes first end and the second end,
The first end of described resonant column is fixedly connected with cavity bottom, and the second end of described resonant column is provided with an opening, and with described lid
Plate is relatively.
3. cavity body filter according to claim 1 is it is characterised in that what described winged bar included being connected with described dividing wall
Connecting rod and the round plate being located at described connecting rod both sides.
4. cavity body filter according to claim 1 is it is characterised in that the described resonant column side corresponding with described winged bar
Face is parallel with described winged rod end surface.
5. cavity body filter according to claim 3 is it is characterised in that described resonant column side corresponding with described winged bar
Parallel with described round plate.
6. cavity body filter according to claim 1 is it is characterised in that described resonant column is polygon cylinder.
7. cavity body filter according to claim 6 is it is characterised in that described resonant column is square resonant column, pentagon
Resonant column or hexagon resonant column.
8. cavity body filter according to claim 2 is it is characterised in that the opening that the second end of described resonant column is provided with is
Circular hole.
9. cavity body filter according to claim 1 is it is characterised in that described resonant column is integrated into described cavity
Type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620683543.2U CN205921058U (en) | 2016-06-29 | 2016-06-29 | Cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620683543.2U CN205921058U (en) | 2016-06-29 | 2016-06-29 | Cavity filter |
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| CN205921058U true CN205921058U (en) | 2017-02-01 |
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| CN201620683543.2U Active CN205921058U (en) | 2016-06-29 | 2016-06-29 | Cavity filter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108550964A (en) * | 2018-05-09 | 2018-09-18 | 广东通宇通讯股份有限公司 | A kind of ceramic dielectric waveguide filter based on capacitive cross coupling flying bar |
| CN108631029A (en) * | 2017-03-23 | 2018-10-09 | 鸿富锦精密工业（深圳）有限公司 | Cavity filter |
| US10403957B2 (en) | 2017-03-23 | 2019-09-03 | Nanning Fugui Precision Industrial Co., Ltd. | Cavity filter |
| WO2019228072A1 (en) * | 2018-05-29 | 2019-12-05 | 华为技术有限公司 | Filter coupling structure and processing method |
-
2016
- 2016-06-29 CN CN201620683543.2U patent/CN205921058U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631029A (en) * | 2017-03-23 | 2018-10-09 | 鸿富锦精密工业（深圳）有限公司 | Cavity filter |
| US10403957B2 (en) | 2017-03-23 | 2019-09-03 | Nanning Fugui Precision Industrial Co., Ltd. | Cavity filter |
| CN108550964A (en) * | 2018-05-09 | 2018-09-18 | 广东通宇通讯股份有限公司 | A kind of ceramic dielectric waveguide filter based on capacitive cross coupling flying bar |
| CN108550964B (en) * | 2018-05-09 | 2024-04-16 | 广东通宇通讯股份有限公司 | Ceramic dielectric waveguide filter based on capacitive cross coupling flying rod |
| WO2019228072A1 (en) * | 2018-05-29 | 2019-12-05 | 华为技术有限公司 | Filter coupling structure and processing method |
| EP3813189A4 (en) * | 2018-05-29 | 2021-06-23 | Huawei Technologies Co., Ltd. | Filter coupling structure and processing method |
| US11239536B2 (en) | 2018-05-29 | 2022-02-01 | Huawei Technologies Co., Ltd. | Coupling structure of filter and processing method |
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