CN107946705A - A kind of dielectric filter - Google Patents
A kind of dielectric filter Download PDFInfo
- Publication number
- CN107946705A CN107946705A CN201711309722.5A CN201711309722A CN107946705A CN 107946705 A CN107946705 A CN 107946705A CN 201711309722 A CN201711309722 A CN 201711309722A CN 107946705 A CN107946705 A CN 107946705A
- Authority
- CN
- China
- Prior art keywords
- cover board
- dielectric
- resonance post
- dielectric resonance
- cavity
- 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
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a kind of dielectric filter.It includes cavity, cover board, dielectric resonator, cover board flange and tuning screw, cover plate lid is located on the cavity, cover board flange is bolted in the lower surface of the cover 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 the cover board flange welding, cavity bottom is equipped with groove, conductive elastomer is equipped with 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, extend 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 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 produces.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 such as structure is simple, cost is low, 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
Shake 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, for compensation medium resonator and other each parts in shape caused by 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 be 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 dielectric filter, it is possible to increase quality factor.
In order to solve the above technical problems, one aspect of the present invention is：A kind of dielectric filter is provided, including
Cavity, cover board, dielectric resonator, cover board flange and tuning screw, the cover plate lid are located on the cavity, the cover board flange
The lower surface of the cover board is bolted in, the dielectric resonator includes dielectric resonance post and support column, the dielectric resonance post
Bottom surface offers card slot, and the top surface of the dielectric resonance post is provided in the axial direction with tuned window, the top surface of the dielectric resonance post with
The cover board flange welding, the cavity bottom are equipped with groove, are equipped with conductive elastomer in the groove, the support column it is upper
End 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 perforative up and down
Through hole, the tuning screw extend down into the tuned window through the through hole of the cover board and the eyelet of the cover board flange
It is interior.
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 outside diameter of the boss is less than the outside 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.
The beneficial effects of the invention are as follows：It is different from the situation of the prior art, the dielectric resonator in the present invention is in cover board method
It can consolidate and be connected in cavity under the action of orchid, ensure that being stably connected with for electric signal；Cover board flange and the cover board of upper end at the same time
It is spirally connected, the deformation that electrical equipment produces by temperature change can compensate for by such a elastic connection, it is ensured that under condition of different temperatures
Cover board can with dielectric resonator good connection, meanwhile, dielectric resonator using support column support, dielectric resonance post can be produced
Heat be effectively passed to cavity, be conducive to the heat dissipation of cavity, in this way, so as to improve quality factor, ensure
Dielectric filter has excellent electric property, works with enabling dielectric filter stability and high efficiency, in addition, also having dismounting side
Just, the advantages of simple is assembled.
Brief description of the drawings
Fig. 1 is the schematic cross-sectional view of dielectric filter provided in an embodiment of the present invention.
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 dielectric filter provided in an embodiment of the present invention refering to Fig. 1, the embodiment of the present invention
Dielectric filter includes cavity 10, cover board 20, dielectric resonator 30, cover board flange 40 and tuning screw 50.
The lid of cover board 20 is located on cavity 10, and cover board flange 40 is bolted in the lower surface of cover board 20, and dielectric resonator 30 includes
Dielectric resonance post 31 and support column 32, the bottom surface of dielectric resonance post 31 offer card slot 311, and the top surface of dielectric resonance post 31 is along axis
To tuned window 312 is offered, top surface and the cover board flange 40 of dielectric resonance post 31 weld, and 10 bottom of cavity is equipped with groove 11, recessed
Conductive elastomer 12 is equipped with groove 11, the upper end of support column 32 is connected in card slot 311, and the lower end of support column 32 abuts conductive bullet
Property body 12, cover board 20 is equipped with upper and lower perforative through hole 21, through hole 21 and cover board flange 40 of the tuning screw 50 through cover board 20
Eyelet, extends down into tuned window 312.
After being installed on due to dielectric resonator 30 in cavity 10, the support column 32 of dielectric resonator 30 and the conduction of cavity 10
Elastomer 12 abuts, therefore can solve asking due to cavity 10 caused by machining tolerance and 30 loose contact of dielectric resonator
Topic, and since the dielectric resonance post 31 of dielectric resonator 30 is supported using support column 32, dielectric resonance post 31 can be produced
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 40 is equipped with boss 41, and the top surface of dielectric resonance post 31 is welded in convex
The lower surface of platform 41.In a ring, the outside diameter of boss 41 is less than the outside diameter of the top surface of dielectric resonance post 31 to boss 41.Since medium is humorous
The device 30 that shakes can consolidate under the action of cover board flange 40 to be connected in cavity 10, ensure that being stably connected with for electric signal；Cover at the same time
Plate flange 40 and the cover board 20 of upper end are spirally connected, and the shape that electrical equipment produces by temperature change is can compensate for by such a elastic connection
Become, it is ensured that can be with 30 good connection of dielectric resonator in condition of different temperatures lower cover 20.
In order to further ensure the stability that the good electrical connection of interelement and dielectric resonance post 31 are welded, in this reality
Apply in example, the top and bottom of dielectric resonance post 31 are equipped with silver coating or Gold plated Layer, it is ensured that the end face of dielectric resonance post 31
Come into full contact with cover board flange 40, ensure the normal work of wave filter.
The foregoing is merely the embodiment of the present invention, is 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, is directly or indirectly used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (4)
- A kind of 1. dielectric filter, it is characterised in that including cavity, cover board, dielectric resonator, 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 dielectric resonator bag Include dielectric resonance post and support column, the bottom surface of the dielectric resonance post offers card slot, and the top surface of the dielectric resonance post is along axis To tuned window is offered, the top surface of the dielectric resonance post and the cover board flange welding, the cavity bottom are equipped with groove, institute State in groove and be equipped with conductive elastomer, the upper end of the support column is connected in the card slot, and the lower end of the support column abuts The conductive elastomer, the cover board are equipped with upper and lower perforative through hole, through hole and institute of the tuning screw through the cover board The eyelet of cover board flange is stated, is extended down into the tuned window.
- 2. dielectric filter according to claim 1, it is characterised in that the lower surface of the cover board flange is equipped with boss, The top surface of the dielectric resonance post is welded in the lower surface of the boss.
- 3. dielectric filter according to claim 2, it is characterised in that the boss in a ring, the outside diameter of the boss Less than the outside diameter of the top surface of the dielectric resonance post.
- 4. dielectric filter according to claim 1, it is characterised in that the top and bottom of the dielectric resonance post are all provided with There are silver coating or Gold plated Layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711309722.5A CN107946705A (en) | 2017-12-11 | 2017-12-11 | A kind of dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711309722.5A CN107946705A (en) | 2017-12-11 | 2017-12-11 | A kind of dielectric filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107946705A true CN107946705A (en) | 2018-04-20 |
Family
ID=61946528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711309722.5A Pending CN107946705A (en) | 2017-12-11 | 2017-12-11 | A kind of dielectric filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107946705A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109346806A (en) * | 2018-09-30 | 2019-02-15 | 香港凡谷發展有限公司 | The three mould resonance structure of cavity and the filter containing the resonance structure of a kind of evagination |
| CN111370815A (en) * | 2018-12-25 | 2020-07-03 | 广东省合正行通信科技有限责任公司 | TM mode dielectric filter with two grounded ends |
Citations (2)
| 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 |
| CN205811024U (en) * | 2016-07-25 | 2016-12-14 | 摩比天线技术（深圳）有限公司 | TM mould dielectric filter |
-
2017
- 2017-12-11 CN CN201711309722.5A patent/CN107946705A/en active Pending
Patent Citations (2)
| 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 |
| 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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109346806A (en) * | 2018-09-30 | 2019-02-15 | 香港凡谷發展有限公司 | The three mould resonance structure of cavity and the filter containing the resonance structure of a kind of evagination |
| CN109346806B (en) * | 2018-09-30 | 2020-11-24 | 香港凡谷發展有限公司 | Convex cavity three-mode resonance structure and filter comprising same |
| US11258150B2 (en) | 2018-09-30 | 2022-02-22 | Hongkong Fingu Development Company Limited | Outwardly protruding triple-mode cavity resonance structure and filter with resonance structure |
| CN111370815A (en) * | 2018-12-25 | 2020-07-03 | 广东省合正行通信科技有限责任公司 | TM mode dielectric filter with two grounded ends |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180420 |