CN108054475A - A kind of TM moulds dielectric filter - Google Patents
A kind of TM moulds dielectric filter Download PDFInfo
- Publication number
- CN108054475A CN108054475A CN201711309532.3A CN201711309532A CN108054475A CN 108054475 A CN108054475 A CN 108054475A CN 201711309532 A CN201711309532 A CN 201711309532A CN 108054475 A CN108054475 A CN 108054475A
- Authority
- CN
- China
- Prior art keywords
- cover board
- cavity
- dielectric
- supporting item
- resonance post
- 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.)
- Pending
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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
- H01P1/2002—Dielectric waveguide filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/10—Dielectric resonators
Abstract
The invention discloses a kind of TM moulds dielectric filters.It includes cavity,Cover board,Cover board flange and tuning screw,Cover plate lid is located on cavity,Cover board flange is bolted in the lower surface of cover board,Dielectric resonator is equipped in cavity,Microstrip line,Circuit board,First supporting item and the second supporting item,Two supporting items are vertically fixed on cavity bottom,Circuit board is vertically connected on the upper end of two supporting items,Microstrip line is arranged on circuit board,Dielectric resonator includes dielectric resonance post and support column,The bottom surface of dielectric resonance post offers card slot,The top surface of dielectric resonance post is provided in the axial direction with tuned window,The top surface of dielectric resonance post and cover board flange welding,Cavity bottom is equipped with groove,Conductive elastomer is equipped in groove,The upper end of support column is connected in card slot,The lower end of support column abuts conductive elastomer,Cover board is equipped with upper and lower perforative through hole,Tuning screw passes through the through hole of cover board and the eyelet of cover board flange,It extends down into tuned window.The present invention can improve quality factor.
Description
Technical field
The present invention relates to technical field of communication equipment, more particularly to a kind of TM moulds dielectric filter.
Background technology
In a communications device, the performance that the performance of local vibration source receives signal has important influence.Local vibration source usually by
The local oscillator source chip or dielectric filter of specific frequency generates.The structure of local oscillator source chip is simple, but expensive, and
External reference clock frequency is needed, therefore application field is smaller.And dielectric filter is by its is small, quality factor are high, knot
The advantages that structure is simple, at low cost, reality are relatively broad in using.
TM mould dielectric filters are that radio-frequency filter realizes miniaturization, light-weighted important means.It is humorous according to TM mould media
It shakes the fundamental resonance principle of device, such dielectric filter configuration aspects need to meet following two conditions：1st, TM moulds dielectric resonator
Two cross sections up and down must sufficiently be contacted with the upper and lower ends face of resonator respectively；2nd, dielectric resonator at least one
End face needs to set flexible connection mechanism, the shape generated for compensation medium resonator and other each parts in temperature change
Become.
Traditional installation method is directly to fix TM mould dielectric resonators by metallic screw, and screw fixation can not be protected
The upper and lower surface of resonator and coming into full contact with for resonator are demonstrate,proved, is also easy to damage resonator, causes electric signal connection not
Stablize.Further, since the introducing of metallic screw, the quality factor of TM mould media can drastically decline, and not have with common metal chamber ratio
Advantage or even it is inferior to common metal chamber, thus application effect and bad.
The content of the invention
The invention mainly solves the technical problem of providing a kind of TM moulds dielectric filters, can improve quality factor.
In order to solve the above technical problems, one aspect of the present invention is：A kind of TM moulds dielectric filter is provided,
Including cavity, cover board, cover board flange and tuning screw, the cover plate lid is located on the cavity, and the cover board flange is bolted in
The lower surface of the cover board, the cavity is interior to be equipped with dielectric resonator, microstrip line, circuit board, the first supporting item and the second support
Part, first supporting item and the second supporting item are spaced and be vertically fixed on the cavity bottom, and the circuit board hangs down
The direct-connected upper end for being connected on first supporting item and the second supporting item, and with first supporting item and the second supporting item formed to
The cavity of few one side opening, the microstrip line are arranged on the circuit board, and the dielectric resonator body is set adjacent to the cavity, institute
Stating dielectric resonator includes dielectric resonance post and support column, and the bottom surface of the dielectric resonance post offers card slot, and the medium is humorous
The top surface of column of shaking is provided in the axial direction with tuned window, the top surface of the dielectric resonance post and the cover board flange welding, the cavity
Bottom is equipped with groove, is equipped with conductive elastomer in the groove, the upper end of the support column is connected in the card slot, the branch
The lower end of dagger abuts the conductive elastomer, and the cover board is equipped with upper and lower perforative through hole, and the tuning screw is described in
The eyelet of the through hole of cover board and the cover board flange, extends down into the tuned window.
Preferably, the lower surface of the cover board flange is equipped with boss, and the top surface of the dielectric resonance post is welded in described convex
The lower surface of platform.
Preferably, in a ring, the outer diameter of the boss is less than the outer diameter of the top surface of the dielectric resonance post to the boss.
Preferably, the top and bottom of the dielectric resonance post are equipped with silver coating or Gold plated Layer.
Preferably, first supporting item and the second supporting item are located at the lower section of the circuit board opposite end respectively.
Preferably, the width of the microstrip line is less than the spacing of first supporting item and the second supporting item.
The beneficial effects of the invention are as follows：The situation of the prior art is different from, the present invention is by setting two supporting items to prop up
Circuit board is supportted, two supporting items form the cavity of at least one side opening with circuit board, microstrip line is set on circuit board, neighbouring cavity
Dielectric resonator body is set, and the ceramic body of dielectric resonator body opens up the through hole there are two types of different-diameter, in this way, below microstrip line
Electromagnetic wave can be coupled by cavity with dielectric resonator body, so as to which the electromagnetic wave absorbed by cavity reduces, electromagnetic wave
Loss also just reduces；And dielectric resonator can be consolidated under the action of cover board flange and is connected in cavity, ensure that telecommunications
Number be stably connected with；Cover board flange and the cover board of upper end are spirally connected simultaneously, and electrical equipment is can compensate for because of temperature by such elastic connection
Degree variation generate deformation, it is ensured that condition of different temperatures lower cover can with dielectric resonator good connection, meanwhile, medium is humorous
The device that shakes is supported using support column, can the heat that dielectric resonance post generates be effectively passed to cavity, is conducive to the heat dissipation of cavity, lead to
This mode is crossed, so as to improve quality factor, ensure that TM moulds dielectric filter has excellent electric property, make TM moulds
It works dielectric filter energy stability and high efficiency, in addition, also having convenient disassembly, assembles the advantages of simple.
Description of the drawings
Fig. 1 is the schematic cross-sectional view of TM moulds dielectric filter provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment belongs to the scope of protection of the invention.
It is the schematic cross-sectional view of TM moulds dielectric filter provided in an embodiment of the present invention refering to Fig. 1, the present invention is implemented
The TM moulds dielectric filter of example includes cavity 10, cover board 20, cover board flange 30 and tuning screw 40.
The lid of cover board 20 is located on cavity 10, and cover board flange 30 is bolted in the lower surface of cover board 20, and medium is equipped in cavity 10
Resonator 50, microstrip line 60, circuit board 70, the first supporting item 80 and the second supporting item 90, the first supporting item 80 and the second support
Part 90 is spaced and is vertically fixed on 10 bottom of cavity, and circuit board 70 is vertically connected on the first supporting item 80 and the second support
The upper end of part 90, and the cavity 71 of at least one side opening is formed with the first supporting item 80 and the second supporting item 90, microstrip line 60 is set
In on circuit board 70, dielectric resonator 50 is set adjacent to cavity 71, and dielectric resonator 50 includes dielectric resonance post 51 and support column
52, the bottom surface of dielectric resonance post 51 offers card slot 511, and the top surface of dielectric resonance post 51 is provided in the axial direction with tuned window 512, is situated between
The top surface of matter resonant column 51 is welded with cover board flange 30, and 10 bottom of cavity is equipped with groove 11, and conductive elastomer is equipped in groove 11
12, the upper end of support column 52 is connected in card slot 511, and the lower end of support column 52 abuts conductive elastomer 12, and cover board 20 is equipped with upper
Under perforative through hole 21, tuning screw 40 through cover board 20 through hole 21 and cover board flange 30 eyelet, extend down into tuning
In hole 312.
After being installed on due to dielectric resonator 50 in cavity 10, the support column 52 of dielectric resonator 50 and the conduction of cavity 10
Elastomer 12 abuts, therefore can solve asking due to cavity 10 caused by machining tolerance and 50 loose contact of dielectric resonator
Topic, and since the dielectric resonance post 51 of dielectric resonator 50 is supported using support column 52, dielectric resonance post 51 can be generated
Heat is effectively passed to cavity 10, is conducive to the heat dissipation of cavity 10.
In the present embodiment, the lower surface of cover board flange 30 is equipped with boss 31, and the top surface of dielectric resonance post 51 is welded in convex
The lower surface of platform 31.In a ring, the outer diameter of boss 31 is less than the outer diameter of the top surface of dielectric resonance post 51 to boss 31.Since medium is humorous
The device 50 that shakes can consolidate under the action of cover board flange 30 to be connected in cavity 10, ensure that being stably connected with for electric signal；It covers simultaneously
Plate flange 30 and the cover board 20 of upper end are spirally connected, and the shape that electrical equipment generates by temperature change is can compensate for by such elastic connection
Become, it is ensured that can be with 50 good connection of dielectric resonator in condition of different temperatures lower cover 20.
Microstrip line 60, which may be employed, to be covered process for copper and is formed on circuit board 70.After microstrip line 60 is set, circuit board 70,
First supporting item 80, the second supporting item 90 and cavity 10 are enclosed the cavity 71 of at least one side opening.Due to cavity 71 not only
For hollow structure, and at least one side opening, therefore cavity 71 can be caused to be communicated with outside, the damage that electromagnetic wave passes through cavity 71
Consumption substantially reduces, thus the electromagnetic wave of 60 lower section of microstrip line can be coupled by cavity 71 with dielectric resonator 50, also
It is to say, is reduced by the electromagnetic wave that cavity 10 absorbs, the loss of electromagnetic wave also just reduces, and then can improve quality factor,
Reduce phase noise, the final performance for promoting dielectric oscillator.
In order to further ensure the stability that the good electrical connection of interelement and dielectric resonance post 51 are welded, in this reality
It applies in example, the top and bottom of dielectric resonance post 51 are equipped with silver coating or Gold plated Layer, it is ensured that the end face of dielectric resonance post 51
It is come into full contact with cover board flange 30, ensures the normal work of wave filter.
In the present embodiment, the first supporting item 80 and the second supporting item 90 are located under 70 opposite end of circuit board respectively
The width of square microstrip lines 60 is less than the spacing of the first supporting item 80 and the second supporting item 90.
The foregoing is merely the embodiment of the present invention, are not intended to limit the scope of the invention, every to utilize this hair
The equivalent structure or equivalent flow shift that bright specification and accompanying drawing content are made directly or indirectly is used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (6)
1. a kind of TM moulds dielectric filter, which is characterized in that including cavity, cover board, cover board flange and tuning screw, the cover board
Lid is located on the cavity, and the cover board flange is bolted in the lower surface of the cover board, be equipped in the cavity dielectric resonator,
Microstrip line, circuit board, the first supporting item and the second supporting item, first supporting item and the second supporting item are spaced and vertical
It being fixed on the cavity bottom, the circuit board is vertically connected on the upper end of first supporting item and the second supporting item, and
The cavity of at least one side opening is formed with first supporting item and the second supporting item, the microstrip line is arranged on the circuit board
On, the dielectric resonator body is set adjacent to the cavity, and the dielectric resonator includes dielectric resonance post and support column, is given an account of
The bottom surface of matter resonant column offers card slot, and the top surface of the dielectric resonance post is provided in the axial direction with tuned window, the dielectric resonance
The top surface of column and the cover board flange welding, the cavity bottom are equipped with groove, and conductive elastomer is equipped in the groove, described
The upper end of support column is connected in the card slot, and the lower end of the support column abuts the conductive elastomer, and the cover board is equipped with
Upper and lower perforative through hole, the tuning screw are extended down into through the through hole of the cover board and the eyelet of the cover board flange
In the tuned window.
2. TM moulds dielectric filter according to claim 1, which is characterized in that the lower surface of the cover board flange is equipped with convex
Platform, the top surface of the dielectric resonance post are welded in the lower surface of the boss.
3. TM moulds dielectric filter according to claim 2, which is characterized in that the boss in a ring, the boss
Outer diameter is less than the outer diameter of the top surface of the dielectric resonance post.
4. TM moulds dielectric filter according to claim 1, which is characterized in that the top and bottom of the dielectric resonance post
It is equipped with silver coating or Gold plated Layer.
5. TM moulds dielectric resonator according to claim 1, which is characterized in that first supporting item and the second supporting item
It is located at the lower section of the circuit board opposite end respectively.
6. TM moulds dielectric resonator according to claim 1, which is characterized in that the width of the microstrip line is less than described the
The spacing of one supporting item and the second supporting item.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711309532.3A CN108054475A (en) | 2017-12-11 | 2017-12-11 | A kind of TM moulds dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711309532.3A CN108054475A (en) | 2017-12-11 | 2017-12-11 | A kind of TM moulds dielectric filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108054475A true CN108054475A (en) | 2018-05-18 |
Family
ID=62123907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711309532.3A Pending CN108054475A (en) | 2017-12-11 | 2017-12-11 | A kind of TM moulds dielectric filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN108054475A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921160A (en) * | 2019-03-21 | 2019-06-21 | 深圳市国人射频通信有限公司 | A kind of TM mould dielectric filter |
| CN110931954A (en) * | 2019-11-20 | 2020-03-27 | 武汉凡谷电子技术股份有限公司 | High-intermodulation AFU antenna |
| WO2022068586A1 (en) * | 2020-09-29 | 2022-04-07 | 中兴通讯股份有限公司 | Dielectric filter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205406688U (en) * | 2016-02-16 | 2016-07-27 | 苏州子波电子科技有限公司 | TE mould dielectric resonator device |
| CN106059499A (en) * | 2016-07-20 | 2016-10-26 | 深圳市华讯星通讯有限公司 | Dielectric resonator oscillator |
| CN205811024U (en) * | 2016-07-25 | 2016-12-14 | 摩比天线技术（深圳）有限公司 | TM mould dielectric filter |
| CN205944361U (en) * | 2016-07-08 | 2017-02-08 | 广东通宇通讯股份有限公司 | TM mould bi -polar short circuit wave filter |
-
2017
- 2017-12-11 CN CN201711309532.3A patent/CN108054475A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205406688U (en) * | 2016-02-16 | 2016-07-27 | 苏州子波电子科技有限公司 | TE mould dielectric resonator device |
| CN205944361U (en) * | 2016-07-08 | 2017-02-08 | 广东通宇通讯股份有限公司 | TM mould bi -polar short circuit wave filter |
| CN106059499A (en) * | 2016-07-20 | 2016-10-26 | 深圳市华讯星通讯有限公司 | Dielectric resonator oscillator |
| CN205811024U (en) * | 2016-07-25 | 2016-12-14 | 摩比天线技术（深圳）有限公司 | TM mould dielectric filter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921160A (en) * | 2019-03-21 | 2019-06-21 | 深圳市国人射频通信有限公司 | A kind of TM mould dielectric filter |
| CN109921160B (en) * | 2019-03-21 | 2023-11-03 | 深圳国人科技股份有限公司 | TM mode dielectric filter |
| CN110931954A (en) * | 2019-11-20 | 2020-03-27 | 武汉凡谷电子技术股份有限公司 | High-intermodulation AFU antenna |
| CN110931954B (en) * | 2019-11-20 | 2022-04-12 | 武汉凡谷电子技术股份有限公司 | High-intermodulation AFU antenna |
| WO2022068586A1 (en) * | 2020-09-29 | 2022-04-07 | 中兴通讯股份有限公司 | Dielectric filter |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180518 |
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| RJ01 | Rejection of invention patent application after publication |