CN207743369U - A kind of modified weak coupling dielectric filter - Google Patents
A kind of modified weak coupling dielectric filter Download PDFInfo
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- CN207743369U CN207743369U CN201721891339.0U CN201721891339U CN207743369U CN 207743369 U CN207743369 U CN 207743369U CN 201721891339 U CN201721891339 U CN 201721891339U CN 207743369 U CN207743369 U CN 207743369U
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- weak coupling
- medium body
- dielectric filter
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Abstract
The utility model proposes modified weak coupling dielectric filter, including medium body, the medium body includes front end face, rear end face and at least one side, through several resonant through holes are offered on the front end face and the rear end face, weak coupling groove is offered on the side of the medium body parallel with plane where several resonant through holes central axis.The utility model opens up groove by the upper surface of the medium body in Contiuum type resonator, can realize smaller coupling amount, solves the problems, such as that conventional weak coupling mode can not be processed in realization very little coupling amount, to realize the filter of ultra-narrow bandwidth.
Description
Technical field
The utility model is related to filter fields, more particularly, to a kind of modified weak coupling dielectric filter.
Background technology
Bandwidth can not only be used for the data transmission capabilities of id signal transmission, moreover it is possible to identify and pass through link in the unit interval
Data volume and display display capabilities, there are many field of application, and in analog signal system, and bandwidth is used for identifying biography
The band width that defeated signal is occupied, this width is determined by the highest frequency and low-limit frequency of transmission signal, therefore is claimed again
For signal bandwidth or carrier frequency bandwidth, unit Hz.
Existing filter, in general, the filter of wide bandwidth be easily achieved using cavity body filter, and realize narrowband
It is wide then be all the dielectric filter using high q-factor.In order to realize weak coupling, that is, ultra-narrow bandwidth is realized, often in dielectric filter
Open circuit surface open up groove, as shown in Figure 1, and by emulation it is found that the size of coupling amount and the depth and width of groove at just
Than the depth and width of i.e. groove are bigger, and coupling amount is bigger, otherwise smaller；When coupling amount demand very little, conventional fluting side
Formula is also unable to reach.
Invention content
The utility model proposes a kind of modified weak coupling dielectric filters, solve conventional mode of grooving and realize weak coupling
Conjunction cannot be satisfied the problem of very little coupling amount, and the main contents of the utility model include：
A kind of modified weak coupling dielectric filter, including medium body, the medium body include front end face, rear end face
Run through at least one side, on the front end face and the rear end face and offers several resonant through holes, several resonance
Through-hole wall, the side and the rear end face are coated with conductive film, and the front end face is open circuit surface, and the front end face is printed with
Local conductor layer and the first input/output port and the second input/output port, with several resonant through holes central axis institutes
Weak coupling groove is offered on the side of the parallel medium body of plane.
Preferably, the weak coupling groove is opened in Jie parallel with plane where several resonant through holes central axis
On the central axis of the side of matter ontology.
Preferably, the weak coupling groove is opened in Jie parallel with plane where several resonant through holes central axis
On the side of matter ontology and one end far from the front end face.
Preferably, the material of the medium body is ceramics.
Preferably, the shape of the medium body is square, cuboid or cylinder.
Preferably, the conductive film is metal material.
Preferably, the metal material is silver or copper.
The beneficial effects of the utility model are：The upper table that the utility model passes through the medium body in Contiuum type resonator
Face opens up groove, can realize smaller coupling amount, solves conventional weak coupling mode and is realizing what very little coupling amount can not process
Problem, to realize the filter of ultra-narrow bandwidth.
Description of the drawings
Fig. 1 is the structural schematic diagram of existing weak coupling dielectric filter；
Fig. 2 is the utility model modified weak coupling dielectric filter structural schematic diagram；
Fig. 3 is the simulation result diagram of existing weak coupling dielectric filter；
Fig. 4 is the utility model modified weak coupling dielectric filter simulation result diagram.
Specific implementation mode
The technical solution protected to the utility model below in conjunction with attached drawing illustrates.
Please refer to Fig. 2.The utility model proposes a kind of modified weak coupling dielectric filter, including medium body 10,
The medium body 10 includes front end face 11, rear end face 12 and at least one side 13, in the present embodiment, the medium body
10 be cuboid, including four sides 13；In other embodiments, the medium body 10 or cylinder or other
Cube.
Several resonant through holes 14, the inner wall of the resonant through holes 14 and the side are offered in the medium body 10
Conductive film is coated on face 13 and the rear end face 12, i.e., the described rear end face 12 is closed circuit face, and the front end face 11 is uncoated to lead
Electrolemma is open circuit surface, and the resonant through holes 14, which run through, to be opened on the front end face 11 and the rear end face 12；The front end face
11 be open circuit surface, is printed with local conductor layer 17 thereon, and the local conductor layer 17 is printed circuit, meanwhile, the front end face
The first input/output port 15 and the second input/output port 16 are additionally provided on 11.The conductive film is metal material, described
Metal material is silver or copper.
To realize that smaller coupling, the filter of the utility model offer weak coupling on the upper surface of medium body 10
Groove 20, i.e. the weak coupling groove 20 are opened in the medium body parallel with plane where 14 central axis of the resonant through holes
Side on, it is preferred that the weak coupling groove is opened on the central axis of the side, if medium body be cuboid, should
Weak coupling groove is opened on the central axis of upper side, and further, the weak coupling groove is opened in the upper side
Central axis on and one end far from the open circuit surface front end face 11；If the medium body 10 is cylinder, the weak coupling
It closes on the excircle above the central axis upright of plane where groove 20 is opened in the central axis of several resonant through holes.
In one of the embodiments, the section of the weak coupling groove can be square, the quadrangles such as rectangle,
It can be circle, can also be other shapes, the utility model is not intended to limit the shape of the weak coupling groove, only weak to realize
For the purpose of coupling.
Fig. 3 is the simulation result diagram of existing weak coupling dielectric filter.This emulation, the depth of coupling recesses are
0.3mm, from the figure 3, it may be seen that abscissa be coupling recesses width, ordinate be coupling amount variation, when width by 1.2mm extremely
When 0.4mm changes, coupling amount is constantly being reduced by 0.0182k-0.0146k, if desired smaller coupling amount, then the coupling is recessed
The size of slot becomes inconvenient processing, increases the difficulty of processing.
And follow-on weak coupling dielectric filter of the utility model is used, as shown in figure 4, the weak coupling of this emulation
The shape of groove uses circular groove, radius to be selected as 0.5mm, and depth is selected as 0.5mm, and simulation result is by apart from the front end face
It is moved successively to the rear end face at 3mm, as shown in Figure 4, coupling amount is changed by 0.0041k to 0.001k, by being compared with Fig. 3
It is found that smaller coupling amount may be implemented using the weak coupling mode of the utility model, and difficulty of processing will not be increased, solved
The problem of usual manner can not be processed.
The above description is only the embodiments of the present invention, and it does not limit the scope of the patent of the present invention, every
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in
Other related technical areas are equally included in the patent within the scope of the utility model.
Claims (7)
1. a kind of modified weak coupling dielectric filter, which is characterized in that including medium body, the medium body includes front end
Run through on face, rear end face and at least one side, the front end face and the rear end face and offers several resonant through holes, it is several
The resonant through holes inner wall, the side and the rear end face are coated with conductive film, and the front end face is open circuit surface, the front end
Face is printed with local conductor layer, and the lower section both sides of the front end face are provided with the first input/output port and the second input/output terminal
Mouthful, offer weak coupling groove on the side of the medium body parallel with plane where several resonant through holes central axis.
2. a kind of modified weak coupling dielectric filter according to claim 1, which is characterized in that the weak coupling groove
It is opened on the central axis of the side of the medium body parallel with plane where several resonant through holes central axis.
3. a kind of modified weak coupling dielectric filter according to claim 2, which is characterized in that the weak coupling groove
It is opened on the side of the medium body parallel with plane where several resonant through holes central axis and far from the front end
The one end in face.
4. a kind of modified weak coupling dielectric filter according to claim 1, which is characterized in that the medium body
Material is ceramics.
5. a kind of modified weak coupling dielectric filter according to claim 1, which is characterized in that the medium body
Shape is square, cuboid or cylinder.
6. a kind of modified weak coupling dielectric filter according to claim 1, which is characterized in that the conductive film is gold
Belong to material.
7. a kind of modified weak coupling dielectric filter according to claim 6, which is characterized in that the metal material is
Silver or copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721891339.0U CN207743369U (en) | 2017-12-29 | 2017-12-29 | A kind of modified weak coupling dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721891339.0U CN207743369U (en) | 2017-12-29 | 2017-12-29 | A kind of modified weak coupling dielectric filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207743369U true CN207743369U (en) | 2018-08-17 |
Family
ID=63120652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721891339.0U Expired - Fee Related CN207743369U (en) | 2017-12-29 | 2017-12-29 | A kind of modified weak coupling dielectric filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207743369U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110504517A (en) * | 2019-08-19 | 2019-11-26 | 京信通信技术(广州)有限公司 | Medium Wave Guide resonator and its port coupling amount adjustment method and filter |
| CN111370816A (en) * | 2019-12-23 | 2020-07-03 | 瑞声科技(新加坡)有限公司 | Ceramic dielectric filter |
-
2017
- 2017-12-29 CN CN201721891339.0U patent/CN207743369U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110504517A (en) * | 2019-08-19 | 2019-11-26 | 京信通信技术(广州)有限公司 | Medium Wave Guide resonator and its port coupling amount adjustment method and filter |
| CN110504517B (en) * | 2019-08-19 | 2021-03-12 | 京信通信技术(广州)有限公司 | Dielectric waveguide resonator, port coupling quantity adjusting method thereof and filter |
| CN111370816A (en) * | 2019-12-23 | 2020-07-03 | 瑞声科技(新加坡)有限公司 | Ceramic dielectric filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180817 Termination date: 20211229 |