CN110233318A - A kind of coupled structure and filter improving filter harmonic performance - Google Patents
A kind of coupled structure and filter improving filter harmonic performance Download PDFInfo
- Publication number
- CN110233318A CN110233318A CN201910616174.3A CN201910616174A CN110233318A CN 110233318 A CN110233318 A CN 110233318A CN 201910616174 A CN201910616174 A CN 201910616174A CN 110233318 A CN110233318 A CN 110233318A
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- filter
- coupling window
- coupled structure
- coupling
- harmonic performance
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- 230000008878 coupling Effects 0.000 claims abstract description 62
- 238000010168 coupling process Methods 0.000 claims abstract description 62
- 238000005859 coupling reaction Methods 0.000 claims abstract description 62
- 238000006880 cross-coupling reaction Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 238000004088 simulation Methods 0.000 description 4
- 239000003989 dielectric material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002706 plastid Anatomy 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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
- H01P5/00—Coupling devices of the waveguide type
Abstract
The present invention relates to wave filter technology field, the edge of dielectric is arranged in specially a kind of coupled structure and filter for improving filter harmonic performance, coupling window described in the coupling window.The coupling window is bar shaped, L-type or Contraband type.The central axes of coupling window opening's edge dielectric are symmetrical.The coupling window is the coupling window or cross-linked coupling window of main road coupling.A kind of coupled structure and filter improving filter harmonic performance provided by the invention, can allow harmonic wave far from filter passband, reduce the loss and manufacturing process complexity of filter, reduce cost.
Description
Technical field
The present invention relates to wave filter technology field, specially a kind of coupled structure and filtering for improving filter harmonic performance
Device.
Background technique
In filter design, not only cavity itself can generate higher mode harmonic wave, and coupled structure can also generate resonance.Especially
It is in the lamination waveguide filter of broadband, harmonic ratio cavity itself the higher mode harmonic wave that often coupled structure generates is closer to filter
The passband of wave device.The harmonic wave of coupled structure can have a huge impact the overall performance of filter, this is to low-pass filter
Design is with great challenge.
Summary of the invention
The invention is intended to provide a kind of coupled structure and filter for improving filter harmonic performance, harmonic wave can be allowed separate
Filter passband reduces the loss and manufacturing process complexity of filter, reduces cost.
In order to solve the above-mentioned technical problem, the application provides the following technical solutions:
A kind of coupled structure improving filter harmonic performance, including coupling window, the coupling window are arranged in medium
The edge of body.
In technical solution of the present invention, coupling window is arranged in the edge of dielectric, due to the electricity of the centre of dielectric
Field is very strong, more weaker toward fringe field, and the magnetic field at edge is strong, more weaker toward the magnetic field at center, and the setting of coupling window is being situated between
The edge of plastid, field distribution very little is electrically coupled very weak, and main to be coupled as magnetic coupling, such setting can allow coupling window
Bring harmonic wave reduces the pressure of the low-pass filter used system farther away from filter passband, improves overall performance；It will
After the structure is applied to filter, under the requirement that same distal end inhibits, it is possible to reduce the sum of series zero point of low-pass filter
Number reduces the loss and manufacturing process complexity of whole filter, to save cost.
Further, the coupling window is bar shaped.
Further, the coupling window is L-type.
Further, the coupling window is Contraband type.
Further, the central axes of the coupling window opening's edge dielectric are symmetrical.
Further, the coupling window is the coupling window of main road coupling.
Further, the coupling window is cross-linked coupling window.
Further, disclosed herein as well is a kind of filter for improving filter harmonic performance, which uses above-mentioned
Coupled structure.
By applying above-mentioned coupled structure, the harmonic wave of filter can be allowed far from the passband of filter, for same distal end
Inhibit desired filter, it is possible to reduce the sum of series zero number of low-pass filter reduces the loss and system of whole filter
Complex process degree is made, to save cost.
Further, the main road coupling window of filter has used above-mentioned coupled structure.
Further, the cross-coupling window of filter has used above-mentioned coupled structure.
Detailed description of the invention
Fig. 1 is the structural schematic diagram in a kind of coupled structure embodiment one for improving filter harmonic performance of the present invention；
Fig. 2 is the structural schematic diagram in a kind of coupled structure embodiment two for improving filter harmonic performance of the present invention；
Fig. 3 is the structural schematic diagram in a kind of coupled structure embodiment three for improving filter harmonic performance of the present invention；
Fig. 4 is the structural schematic diagram in a kind of coupled structure example IV for improving filter harmonic performance of the present invention；
Fig. 5 is the structural schematic diagram in a kind of coupled structure embodiment five for improving filter harmonic performance of the present invention；
Fig. 6 is the structural schematic diagram in a kind of coupled structure embodiment six for improving filter harmonic performance of the present invention；
Fig. 7 is the structural schematic diagram in a kind of filter embodiment seven of the present invention；
Fig. 8 is the electric field strength point of dielectric in a kind of coupled structure embodiment for improving filter harmonic performance of the present invention
Cloth schematic diagram；
Fig. 9 is the magnetic field strength point of dielectric in a kind of coupled structure embodiment for improving filter harmonic performance of the present invention
Cloth schematic diagram；
Figure 10 is the simulation curve figure of existing filter；
Figure 11 is a kind of simulation curve figure of filter of the present invention.
Specific embodiment
It is further described below by specific embodiment:
Label in Figure of description includes: dielectric 1, coupling window 2, the first noumenon 3, the second ontology 4, the first resonance
Portion 5, the second resonant structure 6, third resonant structure 7, the 4th resonant structure 8, the 5th resonant structure 9, the 6th resonant structure 10, cross-coupling window
11, through-hole 12, secondary road couple window 13.
Embodiment one
As shown in Figure 1, a kind of coupled structure of improvement filter harmonic performance of the present embodiment, coupled structure setting with
Between two dielectrics 1, for realizing the coupling of the resonant structure on two dielectrics 1, which includes being arranged at two
The edge of dielectric 1 is arranged in the coupling window 2 of corresponding position on 1 contact surface of dielectric, coupling window 2.
In the present embodiment, coupling window 2 is bar shaped, the side setting on resonant structure surface, the mode of setting such as Fig. 1 institute
Show, specifically, dielectric 1, using ceramics, surface is covered with conductive layer, couples 2 position of window without conductive layer.
Coupling window 2 is arranged in the edge of dielectric 1, as shown in Figure 8 and Figure 9, the electric field of the centre of dielectric 1 is very
By force, more weaker toward fringe field, and the magnetic field at edge is strong, it is more weaker toward the magnetic field at center, coupling window 2 is arranged in ceramic block
Edge, coupling window 2 can be opened in the most strength in magnetic field, the field distribution very little at this is electrically coupled very weak, main coupling
For magnetic coupling, such setting can allow coupling 2 bring harmonic wave of window farther away from filter passband, reduce and use system
Low-pass filter pressure, improve overall performance；After the structure is applied to filter, in the requirement that same distal end inhibits
Under, it is possible to reduce the sum of series zero number of low-pass filter reduces the loss and manufacturing process complexity of whole filter,
To save cost.
Embodiment two
The difference between this embodiment and the first embodiment lies in the present embodiment, set that there are two coupling windows on resonant structure surface
Mouth 2 is symmetrical arranged, as shown in Figure 2 along the central axes of dielectric 1.
Embodiment three
As shown in figure 3, the difference between the present embodiment and the second embodiment lies in that, in the present embodiment, the surface of resonant structure is equipped with
The coupling interface of one Contraband type, the marking shape window being connected to by three are constituted, and are separately positioned on three sides of 1 faying surface of dielectric
Edge.
Example IV
As shown in figure 4, the present embodiment and the difference of embodiment three are, in this implementation, the coupling interface of Contraband type is constituted
Three marking shape windows are not connected to respectively.
Embodiment five
As shown in figure 5, the difference between this embodiment and the first embodiment lies in, in the application, the surface of resonant structure is equipped with a L
The coupling window 2 of type is linked up by the identical marking shape window connection of two length, an angle of 1 faying surface of dielectric is arranged in
Edge.
Embodiment six
As shown in fig. 6, the present embodiment and the difference of embodiment five are, in the application, resonant structure surface sets that there are two L-types
Coupling window 2, the coupling window 2 of the two L-types is separately positioned on the edge at two angles of 1 faying surface of dielectric.
Embodiment seven
As shown in fig. 7, the filter includes multiple dielectrics combined present embodiment discloses a kind of filter
1,1 surface of dielectric is covered with conductive layer, and dielectric 1 includes multiple resonant structures being arranged, and dielectric 1 is equipped with coupling window
2, input interface and output interface couple 2 position of window without conductive layer.
In the present embodiment, dielectric 1 uses ceramic material, and dielectric 1 includes the first noumenon 3 and the second ontology 4, conductive layer
The silver layer of use, the first noumenon 3 include the second resonant structure 6, the first resonant structure 5 and the 6th resonant structure 10 for being arranged successively setting,
Input interface setting is arranged in the first resonant structure 5, output interface in the 6th resonant structure 10, and the second ontology 4 includes and the second resonance
Portion 6, the first resonant structure 5 and the corresponding third resonant structure 7 of the 6th resonant structure 10, the 4th resonant structure 8 and the 5th resonant structure 9.Second
It is main road coupling, the first resonance between resonant structure 6 and third resonant structure 7 and between the 5th resonant structure 9 and the 6th resonant structure 10
It is equipped with cross-coupling window 11 between portion 5 and the second resonant structure 6, is equipped between third resonant structure 7 and the 4th resonant structure 8 corresponding
Cross-coupling window 11.Cross-coupling and the coupled structure of main road coupling can be using the appointing into embodiment five of embodiment one
It anticipates a kind of coupled structure.
In the present embodiment, between the second resonant structure 6 and third resonant structure 7 using the coupled structure in embodiment two, i.e.,
It is opened on the second resonant structure 6 and the respective faying surface of third resonant structure 7 and couples window 2 there are two bar shaped, the two bar shapeds coupling
The both sides edge of faying surface is arranged in along the axisymmetrical of the first noumenon 3 for window 2.5th resonant structure 9 and the 6th resonant structure 10
Between using the coupled structure in example IV, other than two symmetrically arranged marking shape windows, in the 5th resonant structure 9 and
6th resonant structure 10 is also provided with the window of a bar shaped by the edge of close end.Between first resonant structure 5 and the second resonant structure 6,
A pair of corresponding coupling window 2 is equipped between third resonant structure 7 and the 4th resonant structure 8, coupling window 2 also uses two kinds of embodiment
Set-up mode, due to being equipped with before the first resonant structure 5 and the second resonant structure 6, third resonant structure 7 and the 4th resonant structure 8
For the through-hole 12 of resonant structure to be isolated, therefore couples window 2 and be opened in close to the edge of through-hole 12.4th resonant structure 8 and first is humorous
Secondary road coupling between vibration portion 5, is equipped with secondary road coupling window 13, the present embodiment on the 4th resonant structure 8 and the first resonant structure 5
In, it is square in the present embodiment that the coupling of secondary road is using being electrically coupled, therefore it couples the intermediate position that dielectric 1 is arranged in window 2
Shape couples window 2.
The filter of the present embodiment is by the coupled structure using the application, and as shown in Figure 10 and Figure 11, Figure 10 is existing
The simulation curve figure of the filter coupled using being electrically coupled as main road, Figure 11 are the simulation curve figure of the filter of the present embodiment,
It, can be with as can be seen that design through this embodiment, pushes away harmonic wave as far as 4885MHz-4947MHz from 4320MHz-4419MHz
It allows the harmonic wave of filter far from the passband of filter, desired filter is inhibited for same distal end, it is possible to reduce low-pass filtering
The sum of series zero number of device reduces the loss and manufacturing process complexity of whole filter, to save cost.
The above are merely the embodiment of the present invention, the field that invention case study on implementation without being limited thereto is related to is known in scheme
Specific structure and the common sense such as characteristic do not describe excessively herein, one skilled in the art know the applying date or preferential
All ordinary technical knowledges of technical field that the present invention belongs to before Quan can know the prior art all in the field, and
And there is the ability for applying routine experiment means before the date, what one skilled in the art can provide in the application
Under enlightenment, this programme is improved and implemented in conjunction with self-ability, and some typical known features or known method should not become
One skilled in the art implement the obstacle of the application.It should be pointed out that for those skilled in the art, not taking off
Under the premise of from structure of the invention, several modifications and improvements can also be made, these also should be considered as protection scope of the present invention,
These all will not influence the effect and patent practicability that the present invention is implemented.This application claims protection scope should be with its right
It is required that content subject to, the records such as specific embodiment in specification can be used for explaining the content of claim.
Claims (10)
1. a kind of coupled structure for improving filter harmonic performance, including coupling window, it is characterised in that: the coupling window is set
It sets at the edge of dielectric.
2. a kind of coupled structure for improving filter harmonic performance according to claim 1, it is characterised in that: the coupling
Window is bar shaped.
3. a kind of coupled structure for improving filter harmonic performance according to claim 1, it is characterised in that: the coupling
Window is L-type.
4. a kind of coupled structure for improving filter harmonic performance according to claim 1, it is characterised in that: the coupling
Window is Contraband type.
5. a kind of coupled structure of improvement filter harmonic performance, feature described in any one of -4 exist according to claim 1
In: the central axes of the coupling window opening's edge dielectric are symmetrical.
6. a kind of coupled structure for improving filter harmonic performance according to claim 5, it is characterised in that: the coupling
Window is the coupling window of main road coupling.
7. a kind of coupled structure for improving filter harmonic performance according to claim 5, it is characterised in that: the coupling
Window is cross-linked coupling window.
8. a kind of filter, it is characterised in that: using such as improvement filter harmonic performance of any of claims 1-4
Coupled structure.
9. a kind of filter according to claim 8, it is characterised in that: the main road coupling window of filter has been used such as power
Benefit requires the coupled structure for improving filter harmonic performance described in any one of 1-4.
10. a kind of filter according to claim 9, it is characterised in that: the cross-coupling window of filter used as
The coupled structure of any of claims 1-4 for improving filter harmonic performance.
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| CN201910616174.3A CN110233318A (en) | 2019-07-09 | 2019-07-09 | A kind of coupled structure and filter improving filter harmonic performance |
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| CN201910616174.3A CN110233318A (en) | 2019-07-09 | 2019-07-09 | A kind of coupled structure and filter improving filter harmonic performance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111313133A (en) * | 2019-12-18 | 2020-06-19 | 武汉凡谷电子技术股份有限公司 | Double-layer filter and harmonic wave improving method |
| CN112928411A (en) * | 2021-01-27 | 2021-06-08 | 武汉凡谷电子技术股份有限公司 | Dual-mode dielectric filter and zero adjusting method thereof |
| CN112928410A (en) * | 2021-01-27 | 2021-06-08 | 武汉凡谷电子技术股份有限公司 | Dual-mode dielectric filter and zero adjusting method thereof |
| CN113258246A (en) * | 2021-03-26 | 2021-08-13 | 武汉凡谷电子技术股份有限公司 | Method for manufacturing dielectric filter |
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