CN106159395A - Cavity body filter, duplexer and radio frequency remote equipment - Google Patents
Cavity body filter, duplexer and radio frequency remote equipment Download PDFInfo
- Publication number
- CN106159395A CN106159395A CN201510179758.0A CN201510179758A CN106159395A CN 106159395 A CN106159395 A CN 106159395A CN 201510179758 A CN201510179758 A CN 201510179758A CN 106159395 A CN106159395 A CN 106159395A
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- cavity
- cover plate
- resonant column
- body filter
- cavity body
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Abstract
The present invention provides a kind of temperature drift good stability, will not produce the cavity body filter that power is struck sparks and processing cost is low, including cavity and cover plate, cover plate capping cavity forms resonator, and cover plate includes near the first cover plate of cavity side and the second cover plate away from cavity side；First cover plate is provided with punch forming in conjunction and the resonant column stretching out to cavity bottom, resonant column in closing near one end of cavity bottom, the tubular of one end open away from cavity bottom；Second cover plate is provided with tuning screw, and tuning screw stretches in resonant column and abuts resonant column blind end end face.
Description
Technical field
The present invention relates to domain of communication equipment, particularly relate to a kind of cavity body filter, duplexer and remote radio
Equipment.
Background technology
Cavity body filter, as a kind of frequency selection device, is used for selecting communication signal frequency and filters communication letter
Clutter outside number frequency or interference signal, be widely used in mobile base station.Existing cavity body filter one
As include cavity and cover plate, cover plate capping cavity forms resonator, and the bottom of resonator is provided with stretches out towards cover plate
Resonant column, resonant column be one end close one end open tubular.Cover plate is provided with and stretches out in resonant column
Tuning screw, to regulate the frequency of cavity body filter.
Existing resonant column mounting means has two kinds, and first kind of way is: first stamp out single tubular resonance
Post, then the bottom at cavity processes installation base, is finally screwed resonant column in installation convex again
On platform.This mode has a following defect: 1) for the smaller cavity of volume, installation base
The space proportion occupying is relatively big, can increase the Insertion Loss of cavity body filter；2) the connecing of resonant column and installation base
Contacting surface out-of-flatness, causes loose contact between the two, and then affects the mediation Insertion Loss mutually of cavity body filter.
3) resonant column has certain rigging error so that be positioned at adjacent resonant column and the distance flying between bar can not
Reach predetermined requirement, and then affect resonant column and fly to couple index between bar.
The second way is: be molded resonant column and cavity integrated punching.Although this mode overcomes first
The problem that kind of scheme exists, but this mode there is also following several defect: 1) resonant column must be with chamber
Body equally uses aluminum alloy materials manufacture, and the volume of aluminium alloy is acted upon by temperature changes very big, thus right
For some temperature drifts require higher cavity body filter, it is impossible to manufacture in this way.2) tuning screw
Be positioned at resonator, and and resonant column between Capacitance Coupled, owing to the threaded portion of tuning screw outer surface is compared
Sharply, point discharge can be caused, and then produce power sparking.3) owing to cavity body structure is complicated, to punching press
The requirement of mould is higher.
Content of the invention
It is an object of the invention to provide a kind of temperature drift good stability, power sparking and processing cost will not be produced
Low cavity body filter, duplexer and radio frequency remote equipment.
The cavity body filter that the present invention provides includes cavity and cover plate, and cover plate capping cavity forms resonator,
Cover plate includes near the first cover plate of cavity side and the second cover plate away from cavity side；Set on first cover plate
Having punch forming in conjunction and the resonant column stretching out to cavity bottom, resonant column is near cavity bottom
One end is closed, the tubular of one end open away from cavity bottom；Second cover plate is provided with tuning screw, tuning
Screw rod stretches in resonant column and abuts resonant column blind end end face.
The duplexer that the present invention provides includes receiving filter and emission filter, and receiving filter is connected to connect
Between receiving end and antenna terminal, emission filter is connected to send between terminal and antenna terminal, receives filter
The cavity body filter that ripple device and emission filter provide for the present invention.
The radio frequency remote equipment that the present invention provides includes RF transceiver module, power amplifier module and the present invention
The duplexer providing, RF transceiver module is connected with power amplifier module, and power amplifier module is connected with duplexer.
The cavity body filter that the present invention provides, resonant column and the first cover plate are one-body molded, thus resonant column is permissible
Use and waft stability material manufacture with the different high temperature of cavity, thus the temperature drift that improve cavity body filter is steady
Qualitative.First cover plate is only one flat plate, and for cavity, simple in construction is much, is used for accordingly rushing
The mould structure of pressure resonant column and the first cover plate is also very simple.Further, since tuning screw assembly is positioned at first
Outside the resonator that cover plate capping cavity is formed, around there is no electromagnetic field, because of without point discharge, not yet
Power sparking can be produced.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, institute in embodiment being described below
The accompanying drawing using is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 cavity body filter stereogram；
Fig. 2 cavity body filter profile
Fig. 3 the first cover plate stereogram；
Fig. 4 the second cover plate and tuning screw assembly stereogram.
Fig. 5 is the structural representation of duplexer；
Fig. 6 is the structural representation of radio frequency remote equipment；
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
It Chu, is fully described by, it is clear that described embodiment is only a part of embodiment of the present invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
Property work under the premise of the every other embodiment that obtained, broadly fall into the scope of protection of the invention.
Embodiment one
As shown in Figures 1 to 4, the cavity body filter that the present embodiment provides, including cavity 110 and cover plate 120,
Cover plate 120 covers cavity and forms resonator 130, and cover plate 120 includes the first lid near cavity 110 side
Plate 121 and the second cover plate 122 away from cavity 110 side.First cover plate 120 is provided with punching in conjunction
Resonant column 140 that is molded and that stretch out bottom cavity 110.Resonant column 140 is near cavity 110 end
The one end in portion is closed, the tubular away from the one end open bottom cavity 110.Second cover plate 130 is provided with tune
Humorous screw rod 150, in tuning screw 150 stretches into resonant column 140 and abut resonant column 140 blind end end face.
Tuning screw 150 is arranged with tuning nut 160 away from one end of cavity 110, tunes nut 160 He
It is provided with pad 170 between second cover plate 122.
Rotating forward tuning screw 150, tuning screw 150 moves bottom cavity 110, resonant column 140
Blind end end face moves under the responsive to axial force of tuning screw 150 bottom cavity 110, thus reduces humorous
Shake the distance between bottom post 140 blind end end face and cavity 110, and then regulation resonant column and cavity bottom
Between electric capacity.Reversely rotating tuning screw 150, tuning screw 150 moves towards cover plate 120 direction, humorous
The post 140 that shakes resets under the effect of natural resiliency, thus increases resonant column 140 blind end end face and cavity
Electric capacity between distance between bottom 110, and then regulation resonant column and cavity bottom.When tuning screw 150
When rotating to precalculated position, sheathed pad 170 and tuning nut 160, rotation successively on tuning screw 150
Tuning screw 150 is locked on the second cover plate 122 by the humorous nut of modulation 160.
It is stamped with connecting the reinforcement (not shown) of adjacent resonant column 140 on first cover plate 121, with
Increase the intensity of coupling between adjacent resonant column 140.First cover plate 121 faces the side plating of cavity 110
There is the metal level (not shown) as electromagnetic wave good conductor, be such as single layers of copper, or layers of copper
Upper re-plating silver layer, or layers of copper re-plating tin layers.
The manufacture material of cavity 110 is the aluminium alloy of intensity height and light weight.First cover plate 121 and resonant column
140 manufactured by the temperature little material of change by volume, such as 45 steel or steel rolling.45 steel or steel rolling
Thickness to be chosen as existing enough elasticity and also also to have enough intensity.
Second cover plate 122 can use metal material to make, such as aluminium alloy.But propagate electricity in view of cover plate
The function of magnetic wave is realized by the first cover plate 121, and from a cost perspective, the second cover plate 122 is also permissible
Made by employing nonmetallic materials, such as pcb board material or plastic sheet.Same, tuning screw 150
Metal material manufacture can be used as prior art.The cavity body filter of prior art is by adjusting
Humorous screw rod stretches into the degree of depth of resonant column to change dielectric constant between resonant column and cover plate, with change resonant column and
Electric capacity between cover plate, and then change the frequency of cavity body filter.And the cavity body filter of the present embodiment is logical
Overregulate tuning screw and go deep into the distance of resonant column to change the distance between resonant column and cavity bottom, to change
Become the electric capacity between resonant column and cavity bottom, and then change the frequency of cavity body filter.I.e. the present embodiment
Cavity body filter does not needs to produce between tuning screw and cavity or resonant column Capacitance Coupled, therefore from cost angle
Degree considers, the present embodiment tuning screw 150 is preferably and uses nonmetallic materials manufacture, such as plastic sheet or
Person's pcb board material.
Using the cavity body filter that the present embodiment provides, resonant column and the first cover plate are one-body molded, thus resonance
Post can use the different high temperature with cavity to waft stability material manufacture, such that it is able to improve cavity body filter
Temperature drift stability.And the first cover plate is only one flat plate, for cavity, simple in construction is much,
The corresponding mould structure for punching press resonant column and the first cover plate also can become simpler.Further, since adjust
Humorous screw rod is positioned at outside the resonator that the first cover plate capping cavity is formed, and does not around have electromagnetic field, because of without
Point discharge, also will not produce power sparking.
Embodiment two
Fig. 5 is the structural representation of the duplexer of the embodiment of the present invention.As it is shown in figure 5, duplexer 50 wraps
Including receiving filter 51 and emission filter 52, receiving filter 51 is connected to receiving terminal 53 and antenna
Between terminal 54, emission filter 52 is connected to send between terminal 55 and antenna terminal 53, wherein,
Receiving filter 51 and emission filter 52 are the arbitrary cavity body filter in Fig. 1-Fig. 4.
Embodiment three
Fig. 6 is the structural representation of the radio frequency remote equipment of the embodiment of the present invention.As shown in Figure 6, radio frequency draws
Remote equipment 60 includes radio frequency transceiver module the 61st, power amplifier module the 62nd, power module 63 and aforesaid double
Multiplexer 60, radio frequency transceiver module 61 is connected with power amplifier module 62, power amplifier module 62 and duplexer 50
Connect.Each part that power module 63 is radio frequency remote equipment 60 provides power supply.
The principle of the invention and embodiment are set forth by specific case used herein, above example
Explanation be only intended to help to understand method and the core concept thereof of the present invention；Simultaneously for this area one
As technical staff, according to the thought of the present invention, all can change it in specific embodiments and applications
Place, in sum, this specification content should not be construed as limitation of the present invention.
Claims (10)
1. a cavity body filter, it is characterised in that include cavity and cover plate, described cover plate covers cavity
Forming resonator, described cover plate includes near the first cover plate of described cavity side with away from described cavity side
The second cover plate；
Described first cover plate is provided with punch forming in conjunction and the resonant column stretching out to cavity bottom, institute
State resonant column in closing near one end of cavity bottom, the tubular of one end open away from cavity bottom；
Described second cover plate is provided with tuning screw, and described tuning screw stretches in described resonant column and abuts institute
State resonant column blind end end face.
2. cavity body filter according to claim 1, it is characterised in that described first cover plate upper punch
It is pressed with the reinforcement connecting adjacent resonant column.
3. cavity body filter according to claim 1, it is characterised in that described first cover plate faces
The side of described cavity is electroplate with the metal level as electromagnetic wave good conductor.
4. cavity body filter according to claim 1, it is characterised in that described first cover plate is harmonious
The manufacture material of post of shaking is 45 steel or steel rolling.
5. the cavity body filter according to claims 1 to 3 any one, it is characterised in that described
Second cover plate is nonmetallic cover plate.
6. the cavity body filter according to claims 1 to 3 any one, it is characterised in that described
Tuning screw is nonmetallic tuning screw.
7. the cavity body filter according to claims 1 to 3 any one, it is characterised in that described
Cavity is aluminium alloy cavity.
8. the cavity body filter according to claims 1 to 3 any one, it is characterised in that described
Tuning screw is arranged with tuning nut, between described tuning nut and the second cover plate away from described cavity one end
It is provided with pad.
9. a duplexer, including receiving filter and emission filter, described receiving filter is connected to
Between receiving terminal and antenna terminal, described emission filter be connected to send terminal and described antenna terminal it
Between, it is characterised in that described receiving filter and emission filter are claim 1 to 8 any one institute
The cavity body filter stated.
10. a radio frequency remote equipment, it is characterised in that: include RF transceiver module, power amplifier module
And the duplexer described in claim 9, described RF transceiver module is connected with described power amplifier module,
Described power amplifier module is connected with described duplexer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510179758.0A CN106159395B (en) | 2015-04-16 | 2015-04-16 | Cavity filter, duplexer and radio remote unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510179758.0A CN106159395B (en) | 2015-04-16 | 2015-04-16 | Cavity filter, duplexer and radio remote unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106159395A true CN106159395A (en) | 2016-11-23 |
| CN106159395B CN106159395B (en) | 2021-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510179758.0A Active CN106159395B (en) | 2015-04-16 | 2015-04-16 | Cavity filter, duplexer and radio remote unit |
Country Status (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020107322A1 (en) * | 2018-11-29 | 2020-06-04 | 华为技术有限公司 | Resonance rod, filter, and manufacturing method therefor |
| CN111801759A (en) * | 2017-12-15 | 2020-10-20 | Abb瑞士股份有限公司 | Fixing system for medium-voltage or high-voltage switching poles |
| CN113725571A (en) * | 2020-05-20 | 2021-11-30 | 大富科技(安徽)股份有限公司 | Tuning screw, filter and communication equipment |
| WO2022007467A1 (en) * | 2020-07-05 | 2022-01-13 | 华沣通信科技有限公司 | Inverted mount-type filter structure |
| CN114024109A (en) * | 2021-10-11 | 2022-02-08 | 合肥海特微波科技有限公司 | Low-frequency miniaturization matrix radar filter based on medium and special-shaped resonator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111801759A (en) * | 2017-12-15 | 2020-10-20 | Abb瑞士股份有限公司 | Fixing system for medium-voltage or high-voltage switching poles |
| WO2020107322A1 (en) * | 2018-11-29 | 2020-06-04 | 华为技术有限公司 | Resonance rod, filter, and manufacturing method therefor |
| CN113725571A (en) * | 2020-05-20 | 2021-11-30 | 大富科技(安徽)股份有限公司 | Tuning screw, filter and communication equipment |
| WO2022007467A1 (en) * | 2020-07-05 | 2022-01-13 | 华沣通信科技有限公司 | Inverted mount-type filter structure |
| CN114024109A (en) * | 2021-10-11 | 2022-02-08 | 合肥海特微波科技有限公司 | Low-frequency miniaturization matrix radar filter based on medium and special-shaped resonator |
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| Publication number | Publication date |
|---|---|
| CN106159395B (en) | 2021-01-08 |
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Address after: 233000 building 4, national financial incubation Industrial Park, 17 Yannan Road, high tech Zone, Bengbu City, Anhui Province Patentee after: Dafu Technology (Anhui) Co.,Ltd. Address before: 518104 First, Second and Third Floors of A1, A2, A3 101, A4 of Shajing Street, Shajing Street, Baoan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20221123 Address after: 518000 Floor 1, Building A2, No. 2072 Jincheng Road, Haoxiang Community, Shajing Street, Bao'an District, Shenzhen, Guangdong Patentee after: Shenzhen Dafu Precision Technology Co.,Ltd. Address before: 233000 building 4, national financial incubation Industrial Park, 17 Yannan Road, high tech Zone, Bengbu City, Anhui Province Patentee before: Dafu Technology (Anhui) Co.,Ltd. |
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