CN207818857U - A kind of filter - Google Patents
A kind of filter Download PDFInfo
- Publication number
- CN207818857U CN207818857U CN201721712642.XU CN201721712642U CN207818857U CN 207818857 U CN207818857 U CN 207818857U CN 201721712642 U CN201721712642 U CN 201721712642U CN 207818857 U CN207818857 U CN 207818857U
- Authority
- CN
- China
- Prior art keywords
- support element
- dielectric
- slab
- pedestal
- circuit board
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of filters.It includes pedestal and the case that is located on pedestal,Pedestal is equipped with dielectric resonator body,Microstrip line,Circuit board,First support element and the second support element,First support element and the second support element are spaced and be vertically fixed on pedestal,Circuit board is vertically connected on the upper end of the first support element and the second support element,And the cavity of at least one side opening is formed with the first support element and the second support element,Microstrip line is set on circuit board,Dielectric resonator body is arranged adjacent to cavity,Dielectric resonator body includes dielectric-slab and the step impedance resonator that is provided thereon,Interdigital coupling unit and metal ground plate,Dielectric-slab is fixed in base bottom,Metal ground plate is set to the both sides of step impedance resonator width direction,Two interdigital coupling units are symmetrically disposed on the both sides of step impedance resonator length direction,Metal ground plate is embedded with defect ground structure to dielectric-slab,Defect ground structure is helical structure.The utility model can improve quality factor.
Description
Technical field
The utility model is related to technical field of communication equipment, more particularly to a kind of 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 resonator 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 resonator is small by its, quality factor are high, knot
The advantages that structure is simple, at low cost, reality are relatively broad in using.
However, dielectric resonator needs to meet low-loss and the requirement of low phase noise in practical applications, due to medium
The quality factor of resonator are inversely proportional with loss, and low quality factor can increase the phase noise of system, therefore to reduce damage
Consumption and phase noise, can only improve quality factor.But the quality of dielectric resonator is improved there is presently no good method
Factor.
Utility model content
The utility model can improve quality factor mainly solving the technical problems that provide a kind of filter.
In order to solve the above technical problems, the technical solution that the utility model uses is：A kind of filter is provided, including
Pedestal and the case being located on the pedestal, the pedestal be equipped with dielectric resonator body, microstrip line, circuit board, first
Support member and the second support element, first support element and the second support element are spaced and be vertically fixed on the pedestal, institute
State the upper end that circuit board is vertically connected on first support element and the second support element, and with first support element and second
Support member forms the cavity of at least one side opening, and the microstrip line is set on the circuit board, and the dielectric resonator body is neighbouring described
Cavity is arranged, and the dielectric resonator body includes dielectric-slab, step impedance resonator, interdigital coupling unit and metal ground plate, institute
It gives an account of scutum to be fixed in the base bottom, the step impedance resonator is set on the dielectric-slab, the metallic ground
Plate is set on the dielectric-slab of the both sides of the step impedance resonator width direction, and two interdigital coupling units are symmetrical arranged
In on the dielectric-slab of the both sides of the step impedance resonator length direction, the metal ground plate is embedded with defect ground structure extremely
The dielectric-slab, the defect ground structure are helical structure.
Preferably, first support element and the second support element are located at the lower section of the circuit board opposite end.
Preferably, the width of the microstrip line is less than the spacing of first support element and the second support element.
The utility model has the beneficial effects that：The case where being different from the prior art, the utility model is by being arranged two branch
Support member supports circuit board, and two support elements form the cavity of at least one side opening with circuit board, microstrip line is arranged on circuit board,
Dielectric resonator body is arranged in neighbouring cavity, and the ceramic body of dielectric resonator body opens up the through-hole there are two types of different-diameter, in this way, micro-strip
Electromagnetic wave below line can be coupled by cavity with dielectric resonator body, to which the electromagnetic wave absorbed by pedestal reduces,
The loss of electromagnetic wave also just reduces, and then can improve quality factor.
Description of the drawings
Fig. 1 is the schematic cross-sectional view for the filter that the utility model embodiment provides.
Fig. 2 is the schematic top plan view of the dielectric resonator body in Fig. 1.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Refering to fig. 1 and Fig. 2, the filter of the utility model embodiment includes pedestal 10 and the cover that is located on pedestal 10
Shell 20, pedestal 10 are equipped with dielectric resonator body 30, microstrip line 40, circuit board 50, the first support element 60 and the second support element 70.
First support element 60 and the second support element 70 are spaced and be vertically fixed on pedestal 10, and circuit board 50 vertically connects
It is connected on the upper end of the first support element 60 and the second support element 70, and at least one is formed with the first support element 60 and the second support element 70
The cavity 51 of face opening, microstrip line 40 are set on circuit board 50.
Dielectric resonator body 30 adjacent to cavity 51 be arranged, dielectric resonator body 30 include dielectric-slab 31, step impedance resonator 32,
Interdigital coupling unit 33 and metal ground plate 34, dielectric-slab 31 are fixed on 10 bottom of pedestal, and step impedance resonator 32 is set to
On dielectric-slab 31, metal ground plate 34 is set on the dielectric-slab 31 of the both sides of 32 width direction of step impedance resonator, two friendships
On the dielectric-slab 31 for referring to the both sides that coupling unit 33 is symmetrically disposed on 32 length direction of step impedance resonator, metal ground plate
34 are embedded with defect ground structure 341 to dielectric-slab 31, and defect ground structure 341 is helical structure.32 He of step impedance resonator
Interdigital coupling unit 33 can be with 34 direct-coupling of metal ground plate of both sides.
Defect ground structure 341 is that dielectric-slab 31 is embedded on metal ground plate 34, i.e. defect ground structure 341 is really
A helical structure is formed on metal ground plate 34, and the helical structure is directly to dig metal ground plate 34 to wear to Jie
Scutum 31 is formed and metal ground plate 34 is to form a helical structure hollowed out, makes the medium under metal ground plate 34
Plate 31 can there are one helical structures to expose, and is not stopped by metal ground plate 34.The length of defect ground structure 341 can be adjusted
Section, the length by adjusting defect ground structure 341 realize the adjusting to filter trap centre frequency so that the trap of filter
Centre frequency is easy to adjust, while also avoiding the interference of other signals.
Microstrip line 40, which may be used, to be covered process for copper and is formed on circuit board 50.After microstrip line 40 is set, circuit board 50,
First support element 60, the second support element 70 and pedestal 10 are enclosed the cavity 51 of at least one side opening.Not only due to cavity 51
For hollow structure, and at least one side is open, therefore cavity 51 can be made to be communicated with outside, the damage that electromagnetic wave passes through cavity 51
Consumption substantially reduces, thus the electromagnetic wave of 40 lower section of microstrip line can be coupled by cavity 51 with dielectric resonator body 30, also
It is to say, is reduced by the electromagnetic wave that pedestal 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 the present embodiment, the first support element 60 and the second support element 70 are located under 50 opposite end of circuit board
The width of square microstrip lines 40 is less than the spacing of the first support element 60 and the second support element 70.
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 (3)
1. a kind of filter, which is characterized in that including pedestal and the case being located on the pedestal, the pedestal is equipped with
Dielectric resonator body, microstrip line, circuit board, the first support element and the second support element, first support element and the second support element phase
It is mutually spaced and is vertically fixed on the pedestal, the circuit board is vertically connected on first support element and the second support element
Upper end, and the cavity that at least one side is open is formed with first support element and the second support element, the microstrip line is set to described
On circuit board, the dielectric resonator body is arranged adjacent to the cavity, and the dielectric resonator body includes dielectric-slab, Stepped Impedance resonance
Device, interdigital coupling unit and metal ground plate, the dielectric-slab are fixed in the base bottom, the step impedance resonator
On the dielectric-slab, the metal ground plate is set to the dielectric-slab of the both sides of the step impedance resonator width direction
On, on the dielectric-slab for the both sides that two interdigital coupling units are symmetrically disposed on the step impedance resonator length direction,
The metal ground plate is embedded with defect ground structure to the dielectric-slab, and the defect ground structure is helical structure.
2. filter according to claim 1, which is characterized in that first support element and the second support element are located at
The lower section of the circuit board opposite end.
3. filter according to claim 1, which is characterized in that the width of the microstrip line is less than first support element
With the spacing of the second support element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721712642.XU CN207818857U (en) | 2017-12-11 | 2017-12-11 | A kind of filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721712642.XU CN207818857U (en) | 2017-12-11 | 2017-12-11 | A kind of filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207818857U true CN207818857U (en) | 2018-09-04 |
Family
ID=63331725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721712642.XU Expired - Fee Related CN207818857U (en) | 2017-12-11 | 2017-12-11 | A kind of filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207818857U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863591A (en) * | 2017-12-11 | 2018-03-30 | 四川九鼎智远知识产权运营有限公司 | A kind of wave filter |
-
2017
- 2017-12-11 CN CN201721712642.XU patent/CN207818857U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863591A (en) * | 2017-12-11 | 2018-03-30 | 四川九鼎智远知识产权运营有限公司 | A kind of wave filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190308 Address after: 510000 B1B2, one, two, three and four floors of the podium building 231 and 233, science Avenue, Guangzhou, Guangdong. Patentee after: BOAO ZONGHENG NETWORK TECHNOLOGY Co.,Ltd. Address before: 610041 Sichuan Chengdu high tech Zone No. 1 Tianfu 69 street 1 1 unit 16 level 1610 Patentee before: SICHUAN JIUDINGZHIYUAN INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Effective date of registration: 20190308 Address after: 350003 Floor 2, Building 52, Fuzhou Software Park C, 89 Software Avenue, Gulou District, Fuzhou City, Fujian Province Patentee after: FUZHOU ZHONGJIYUAN ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 510000 B1B2, one, two, three and four floors of the podium building 231 and 233, science Avenue, Guangzhou, Guangdong. Patentee before: BOAO ZONGHENG NETWORK TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180904 Termination date: 20211211 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |