CN208078145U - A kind of ultra-wide band filter - Google Patents
A kind of ultra-wide band filter Download PDFInfo
- Publication number
- CN208078145U CN208078145U CN201721711345.3U CN201721711345U CN208078145U CN 208078145 U CN208078145 U CN 208078145U CN 201721711345 U CN201721711345 U CN 201721711345U CN 208078145 U CN208078145 U CN 208078145U
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- Prior art keywords
- dielectric
- support element
- cavity
- slab
- resonator
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Abstract
The utility model discloses a kind of ultra-wide band filters.It includes cavity and cover board,Dielectric resonator is equipped in cavity,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 cavity bottom,Circuit board is vertically connected on the upper end of two support elements,And the cavity of at least one side opening is formed with two support elements,Microstrip line is set on circuit board,Dielectric resonator includes tuning screw,Dielectric-slab,Step impedance resonator,Interdigital coupling unit,Metal ground plate and metal resonant column,Tuning screw is fixed on the cover board,Dielectric-slab is fixed on the one side of metal resonant column opening,Step impedance resonator is set on dielectric-slab,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 helical structure to dielectric-slab.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 ultra-wide band 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 ultra-wide band filter.
In order to solve the above technical problems, the technical solution that the utility model uses is：A kind of ultra wide band filtering is provided
Device, including cavity and lid are located at cover board on the cavity, be equipped in the cavity dielectric resonator, 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 the cavity
On bottom, the circuit board is vertically connected on the upper end of first support element and the second support element, and is supported with described first
Part and the second support element form the cavity of at least one side opening, and the microstrip line is set on the circuit board, the dielectric resonance
Device is arranged adjacent to the cavity, and the dielectric resonator includes tuning screw, dielectric-slab, step impedance resonator, interdigital coupling
Component, metal ground plate and metal resonant column, the tuning screw are fixed on by tuning nut on the cover board, the metal
Resonant column is open-topped hollow barrel-type structure, and the metal resonant column is closed to be fixed on the cavity bottom, institute on one side
The one side that scutum is fixed on the metal resonant column opening is given an account of, the step impedance resonator is set on the dielectric-slab, institute
Metal ground plate is stated on the dielectric-slab of the both sides of the step impedance resonator width direction, two interdigital coupling parts
Part is symmetrically disposed on the dielectric-slab of the both sides of the step impedance resonator length direction, and the metal ground plate is embedded with scarce
Ground structure is fallen into the dielectric-slab, the defect ground structure is 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 is arranged in neighbouring cavity, in this way, the electromagnetic wave below microstrip line can be carried out by cavity and ultra-wide band filter
Coupling, to by pedestal absorb electromagnetic wave reduce, the loss of electromagnetic wave also just reduces, so can improve quality because
Number.
Description of the drawings
Fig. 1 is the schematic cross-sectional view for the ultra-wide band filter that the utility model embodiment provides.
Fig. 2 is the structural schematic diagram of the dielectric resonator for the ultra-wide band filter that the utility model embodiment provides.
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, it is the schematic cross-sectional view for the ultra-wide band filter that the utility model embodiment provides.This practicality is new
The ultra-wide band filter of type embodiment includes cavity 10 and covers the cover board 20 being located on cavity 10, and medium is equipped in cavity 10
Resonator 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 10 bottom of cavity, and circuit board 50 hangs down
The direct-connected upper end for being connected on the first support element 60 and the second support element 70, and formed extremely with the first support element 60 and the second support element 70
The cavity 51 of few one side opening, microstrip line 40 are set on circuit board 50, and dielectric resonator 30 is arranged adjacent to cavity 51, such as Fig. 2 institutes
Show, dielectric resonator 30 connects including tuning screw 31, dielectric-slab 32, step impedance resonator 33, interdigital coupling unit 34, metal
Floor 35 and metal resonant column 36, tuning screw 31 are fixed on by tuning nut 37 on cover board 20, and metal resonant column 36 is top
The hollow barrel-type structure of portion's opening, metal resonant column 36 is closed to be fixed on 10 bottom of cavity on one side, and dielectric-slab 32 is fixed on gold
Belong to the one side that resonant column 36 is open, it is humorous set on Stepped Impedance that step impedance resonator 33 is set to metal ground plate 35 on dielectric-slab 32
On the dielectric-slab 32 of the both sides for 33 width direction of device of shaking, two interdigital coupling units 34 are symmetrically disposed on step impedance resonator 33
On the dielectric-slab 32 of the both sides of length direction, metal ground plate 35 is embedded with defect ground structure 351 to dielectric-slab 32, defect
Structure 351 is helical structure.Step impedance resonator 33 and interdigital coupling unit 34 can be with the metal ground plates 35 of both sides
Direct-coupling.
After dielectric resonator 30 is installed in cavity 10, by tuning screw 31 to dielectric resonator 30 inside cavity 10
Frequency be tuned, principle is：Capacitance is formed between the upper surface and the lower surface of cover board 20 of dielectric-slab 32, by adjusting
Dielectric-slab 32 before cover board 20 at a distance from, thus it is possible to vary the capacitance size of the capacitance, and then change ultra-wide band filter
Frequency.Since the characteristic of forceful electric power field distribution being not present between dielectric-slab 32 and cover board 20, in conjunction with the one of 36 material of metal resonant column
Simplicity, the ease for operation of assembly that cause property and zero are realized, to promote the power capacity of ultra-wide band filter.
Defect ground structure 351 is that dielectric-slab 32 is embedded on metal ground plate 35, i.e. defect ground structure 351 is really
A helical structure is formed on metal ground plate 35, and the helical structure is directly to dig metal ground plate 35 to wear to Jie
Scutum 32 is formed and metal ground plate 35 is to form a helical structure hollowed out, makes the medium under metal ground plate 35
Plate 32 can there are one helical structures to expose, and is not stopped by metal ground plate 35.The length of defect ground structure 351 can be adjusted
Section, the length by adjusting defect ground structure 351 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 cavity 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 30, 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 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 ultra-wide band filter, which is characterized in that be located at the cover board on the cavity, the cavity including cavity and lid
It is interior to be equipped with dielectric resonator, microstrip line, circuit board, the first support element and the second support element, first support element and second
Support member is spaced and is vertically fixed on the cavity bottom, and the circuit board is vertically connected on first support element and
The upper end of two support elements, and form the cavity that at least one side is open, the micro-strip with first support element and the second support element
Line be set to the circuit board on, the dielectric resonator is arranged adjacent to the cavity, the dielectric resonator include tuning screw,
Dielectric-slab, step impedance resonator, interdigital coupling unit, metal ground plate and metal resonant column, the tuning screw pass through tune
Humorous nut is fixed on the cover board, and the metal resonant column is open-topped hollow barrel-type structure, the metal resonant column
Closed to be fixed on the cavity bottom on one side, the dielectric-slab is fixed on the one side of the metal resonant column opening, the rank
The electric impedance resonator that jumps is set on the dielectric-slab, and the metal ground plate is set to the two of the step impedance resonator width direction
On the dielectric-slab of side, two interdigital coupling units are symmetrically disposed on the both sides of the step impedance resonator length direction
On dielectric-slab, the metal ground plate is embedded with defect ground structure to the dielectric-slab, and the defect ground structure is spiral shape knot
Structure.
2. ultra-wide band filter according to claim 1, which is characterized in that first support element and the second support element point
Not Wei Yu the circuit board opposite end lower section.
3. ultra-wide band filter according to claim 1, which is characterized in that the width of the microstrip line is less than described first
The spacing of support element and the second support element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721711345.3U CN208078145U (en) | 2017-12-11 | 2017-12-11 | A kind of ultra-wide band filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721711345.3U CN208078145U (en) | 2017-12-11 | 2017-12-11 | A kind of ultra-wide band filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208078145U true CN208078145U (en) | 2018-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721711345.3U Expired - Fee Related CN208078145U (en) | 2017-12-11 | 2017-12-11 | A kind of ultra-wide band filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208078145U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054478A (en) * | 2017-12-11 | 2018-05-18 | 四川九鼎智远知识产权运营有限公司 | A kind of ultra-wide band filter |
-
2017
- 2017-12-11 CN CN201721711345.3U patent/CN208078145U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054478A (en) * | 2017-12-11 | 2018-05-18 | 四川九鼎智远知识产权运营有限公司 | A kind of ultra-wide band filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190304 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. Effective date of registration: 20190304 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. |
|
| 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: 20181109 Termination date: 20211211 |