CN110336102A - A kind of dielectric waveguide filter, radio-frequency module and base station improving harmonic performance - Google Patents
A kind of dielectric waveguide filter, radio-frequency module and base station improving harmonic performance Download PDFInfo
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- CN110336102A CN110336102A CN201910615496.6A CN201910615496A CN110336102A CN 110336102 A CN110336102 A CN 110336102A CN 201910615496 A CN201910615496 A CN 201910615496A CN 110336102 A CN110336102 A CN 110336102A
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- 230000008878 coupling Effects 0.000 claims abstract description 143
- 238000010168 coupling process Methods 0.000 claims abstract description 143
- 238000005859 coupling reaction Methods 0.000 claims abstract description 143
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000006880 cross-coupling reaction Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004891 communication Methods 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
- 238000001914 filtration Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 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
Abstract
The present invention relates to wave filter technology fields, specially a kind of dielectric waveguide filter, radio-frequency module and base station for improving harmonic performance, the dielectric waveguide filter includes dielectric and at least two resonant structures on different medium body, it is coupled between resonant structure by coupling window, the edge of dielectric is arranged in the coupling window.The coupling window is the coupling window or cross-linked coupling window of main road coupling.The coupling window is bar shaped, L-type or Contraband type and symmetrical along the central axes of dielectric.A kind of dielectric waveguide filter, radio-frequency module and base station improving 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 dielectric waveguide filter for improving harmonic performance, radio frequency
Module and base station.
Background technique
Dielectric waveguide filter compares traditional metal cavity waveguide filter, with small in size, Insertion Loss is small, bears power
Greatly, the advantages such as at low cost, can satisfy in 5G communication system for filter specifications.
In dielectric waveguide filter, not only cavity itself can generate higher mode harmonic wave, and coupled structure can also generate resonance.
Especially in the lamination waveguide filter of broadband, harmonic ratio cavity itself the higher mode harmonic wave that often coupled structure generates more is leaned on
The passband of nearly filter.The harmonic wave of coupled structure can have a huge impact the overall performance of filter, this is to low-pass filtering
The great challenge of the design band of device.
Summary of the invention
The invention is intended to provide a kind of dielectric waveguide filter, radio-frequency module and base station for improving harmonic performance, Neng Gourang
Harmonic wave reduces the loss and manufacturing process complexity of filter, reduces cost far from filter passband.
In order to solve the above-mentioned technical problem, the application provides the following technical solutions:
A kind of dielectric waveguide filter improving harmonic performance, including dielectric and at least two is positioned at different medium body
On resonant structure, be coupled between resonant structure by coupling window, the edge of dielectric is arranged in the coupling window.
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；Make
With such filter for coupling the structure, under the requirement that same distal end inhibits, it is possible to reduce the sum of series of low-pass filter
Zero number reduces the loss and manufacturing process complexity of whole filter, to save cost.
Further, the coupling window is the coupling window or cross-linked coupling window of main road coupling.
Further, the dielectric includes the first noumenon and the second ontology, and the first noumenon includes being arranged successively setting
The 6th resonant structure, the first resonant structure and the second resonant structure, second ontology includes corresponding with the resonant structure on the first noumenon
The 5th resonant structure, the 4th resonant structure and the third resonant structure being arranged；
The coupling window includes that the first coupling window, the second coupling window and third couple window, first coupling
The surface of the first resonant structure and the surface of the 4th resonant structure is arranged in window, and the second coupling window is arranged in the second resonant structure
Surface and third resonant structure surface, surface and the 6th resonant structure of the 5th resonant structure is arranged in third coupling window
Surface, the second coupling window and third coupling window are that main road couples window.
Second coupling window and third coupling window are that main road couples window, and the side of dielectric is arranged in coupling window
Edge can allow coupling window bring harmonic wave farther away from filter passband, improve filter so that main road is coupled as magnetic coupling
Wave device performance.
Further, the first coupling window is that secondary road couples window, and the first coupling window is arranged in the first resonance
The middle position in portion and the surface of the 4th resonant structure.By the way that secondary road is coupled the interposition that resonant structure surface is arranged in the window's position
It sets, so that secondary road is coupled as being electrically coupled.
It further, further include the 4th coupling window, the 4th coupling window, which is arranged, is located at the first resonance in the first noumenon
On the surface of portion and the second resonant structure junction and the second ontology is located at the table of third resonant structure and the 4th resonant structure junction
On face, the 4th coupling window is cross-coupling window.Cross-coupling window is also disposed at edge, so that cross-coupling
For magnetic coupling.
Further, the dielectric is equipped with input interface and output interface, and the input interface is arranged in the first resonance
Portion, the output interface are arranged in the 6th resonant structure.The resonant structure where resonant structure and output interface where input interface is set
It sets on the same dielectric, facilitates installation, be conducive to system compact and the system integration.
Further, the coupling window is bar shaped, L-type or Contraband type.
Further, the central axes of the coupling window opening's edge dielectric are symmetrical.
Further, application also discloses a kind of radio-frequency module, the filter including above-mentioned improvement harmonic performance.
Due to having used above-mentioned dielectric waveguide filter, it can equally allow harmonic wave farther away from filter passband, improve
Harmonic performance, and then reduce cost.
Further, disclosed herein as well is a kind of base stations, including above-mentioned radio-frequency module.
Due to having used above-mentioned radio-frequency module, harmonic performance can be improved, reduce production cost.
Detailed description of the invention
Fig. 1 is the overall structure signal in a kind of dielectric waveguide filter embodiment one for improving harmonic performance of the present invention
Figure；
Fig. 2 is the knot of the second coupling window in a kind of dielectric waveguide filter embodiment one for improving harmonic performance of the present invention
Structure schematic diagram；
Fig. 3 is the knot that third couples window in a kind of dielectric waveguide filter embodiment one for improving harmonic performance of the present invention
Structure schematic diagram；
Fig. 4 is the electric field strength point of dielectric in a kind of dielectric waveguide filter embodiment for improving harmonic performance of the present invention
Cloth schematic diagram；
Fig. 5 is the magnetic field strength point of dielectric in a kind of dielectric waveguide filter embodiment for improving harmonic performance of the present invention
Cloth schematic diagram；
Fig. 6 is a kind of simulation curve figure for the dielectric waveguide filter for improving harmonic performance of the present invention.
Fig. 7 is the simulation curve figure of existing filter；
Fig. 8 is the knot of the second coupling window in a kind of dielectric waveguide filter embodiment three for improving harmonic performance of the present invention
Structure schematic diagram；
Fig. 9 is the knot of the second coupling window in a kind of dielectric waveguide filter example IV for improving harmonic performance of the present invention
Structure schematic diagram；
Figure 10 is the second coupling window in a kind of dielectric waveguide filter embodiment five for improving harmonic performance of the present invention
Structural schematic diagram；
Figure 11 is the second coupling window in a kind of dielectric waveguide filter embodiment six for improving harmonic performance of the present invention
Structural schematic diagram.
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 the 10, the 4th couple window
11, through-hole 12, first couples window 13.
Embodiment one
As shown in Figure 1, a kind of dielectric waveguide filter for improving harmonic performance, which includes multiple combine
Dielectric 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
Window 2, input interface and output interface are coupled, coupling 2 position of window is without conductive layer, input interface and output interface setting
On the different resonant structures of the same dielectric 1, between the resonant structure where resonant structure and output interface where input interface
At least provided with an isolation part, the coupling bandwidth between two resonant structures that isolation part connects it, which is less than, uses the medium
The 10% of the bandwidth of operation of the dielectric waveguide filter of body 1.The junction of different resonant structures is equipped with through-hole 12, resonance on dielectric
The surface in portion is equipped with blind hole.
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 6th resonant structure 10, isolation part in the first resonant structure 5 in the first resonant structure 5, output interface setting
With the middle position of 10 junction of the 6th resonant structure, isolation part is a strip through-hole 12, humorous in the first resonant structure 5 and second
The junction in vibration portion 6 is equipped with a pair of of through-hole 12.
Second ontology 4 includes third resonant structure corresponding with the second resonant structure 6, the first resonant structure 5 and the 6th resonant structure 10
7, the 4th resonant structure 8 and the 5th resonant structure 9.In the junction and the 4th resonant structure 8 of third resonant structure 7 and the 4th resonant structure 8
A pair of of through-hole 12 is provided with the junction of the 5th resonant structure 9, and in this implementation, through-hole 12 is preferably ellipse.
Coupling window 2 includes that the first coupling window 13, second couples window, third coupling window and the 4th coupling window
11, the surface on the surface and the 4th resonant structure 8 of the first resonant structure 5 is arranged in the first coupling window 13；Second coupling
The surface of the second resonant structure 6 and the surface of third resonant structure 7 is arranged in window；The third coupling window is arranged in the 5th resonance
The surface on the surface in portion 9 and the 6th resonant structure 10；The 4th coupling window 11, which is arranged, is located at the first resonant structure in the first noumenon 3
5 and 6 junction of the second resonant structure surface on and the second ontology 4 be located at 8 junction of third resonant structure 7 and the 4th resonant structure
On surface.
It is main road coupling between second resonant structure 6 and third resonant structure 7 and between the 5th resonant structure 9 and the 6th resonant structure 10
It closes, is cross-coupling between the first resonant structure 5 and the second resonant structure 6, secondary road coupling between the 4th resonant structure 8 and the first resonant structure 5
It closes, i.e., the first coupling window 13 is that secondary road couples window, and the second coupling window and third coupling window are the coupling of main road
Window.The 4th coupling window 11 is cross-coupling window.Cross-linked coupling window 2 and the coupling window of main road coupling
Mouthfuls 2 are arranged at the edge of the dielectric 1 where resonant structure, can be with so that main road coupling and cross-coupling are magnetic coupling
It allows coupling 2 bring harmonic wave of window farther away from filter passband, improves performance of filter.The first coupling window 13 is arranged
In the middle position on the surface of the first resonant structure 5 and the 4th resonant structure 8.In the present embodiment, the first coupling window 13 is rectangular coupling
Window 2 is closed, by the way that secondary road is coupled the middle position that resonant structure surface is arranged in the window's position, so that secondary road is coupled as thermocouple
It closes.
Main road coupling and cross-linked coupling window 2 can be bar shaped, L-type or Contraband type.It is humorous second in the present embodiment
It is opened in vibration portion 6 and the respective faying surface of third resonant structure 7 and couples window 2 there are two bar shaped, as shown in Fig. 2, the two bar shaped couplings
Close the both sides edge that faying surface is arranged in window 2.As shown in figure 3, between the 5th resonant structure 9 and the 6th resonant structure 10, in addition to
Other than the marking shape window that two both sides edges in faying surface are arranged, proximal end is leaned in the 5th resonant structure 9 and the 6th resonant structure 10
The edge in portion is also provided with the window of a bar shaped, that is, shares window there are three being total between the 5th resonant structure 9 and the 6th resonant structure 10.
A pair of corresponding coupling window is equipped between first resonant structure 5 and the second resonant structure 6, between third resonant structure 7 and the 4th resonant structure 8
Mouth 2, coupling window 2 also uses the set-up mode of two marking shape windows, due in the first resonant structure 5 and the second resonant structure 6, third
It is equipped with the through-hole 12 of the ellipse for resonant cavity to be isolated before resonant structure 7 and the 4th resonant structure 8, therefore couples window 2 and opens
At the edge close to through-hole 12.
Coupling window 2 is arranged in the edge of dielectric 1, as shown in Figure 4 and Figure 5, 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；The emulation of the dielectric waveguide filter of the improvement harmonic performance of the present embodiment
As a result as shown in fig. 6, Fig. 7 is the simulation curve figure of the existing filter coupled using being electrically coupled as main road, it can be seen that pass through
The design of the present embodiment pushes away harmonic wave as far as 4885MHz-4947MHz from 4320MHz-4419MHz, can allow the humorous of filter
Passband of the wave far from filter inhibits desired filter for same distal end, it is possible to reduce the sum of series zero of low-pass filter
Point number reduces the loss and manufacturing process complexity of whole filter, to save cost.
The present embodiment also discloses a kind of radio-frequency module, the dielectric waveguide filter including above-mentioned improvement harmonic performance,
Signal can be filtered in radio-frequency module receiving and transmitting data signals by dielectric waveguide filter.
The present embodiment also discloses a kind of base station, including above-mentioned radio-frequency module, at the transmitting-receiving for carrying out data-signal
Reason.
Embodiment two
The difference between this embodiment and the first embodiment lies in coupling window 2 along the central axes pair of dielectric 1 in the present embodiment
Claim distribution.
Embodiment three
As shown in figure 8, the difference between this embodiment and the first embodiment lies in, the coupling window 2 or/and intersection coupling of main road coupling
The bar shaped that the coupling window 2 of conjunction is only located at 1 edge of dielectric comprising one couples window 2.
Specifically, the second coupling window uses the coupling window 2 of a bar shaped in the present embodiment.In its of the application
In his embodiment, the coupling window 2 or cross-linked coupling window 2 for being also possible to the coupling of other main roads use a bar shaped
Coupling window 2.
Example IV
As shown in figure 9, the difference between this embodiment and the first embodiment lies in, the coupling window 2 or/and intersection coupling of main road coupling
The coupling window 2 of conjunction uses Contraband type window.
Specifically, the second coupling window uses Contraband type window in the present embodiment.In the other embodiments of the application,
The coupling window 2 or cross-linked coupling window 2 for being also possible to the coupling of other main roads use Contraband type window.
Embodiment five
As shown in Figure 10, the difference between this embodiment and the first embodiment lies in, main road coupling coupling window 2 or/and intersect
The coupling window 2 of coupling uses L-type window.
Specifically, the second coupling window uses L-type window, the second resonant structure 6 and third resonant structure 7 in the present embodiment
Surface be equipped with the coupling window 2 of a L-type, be made of, be arranged in dielectric 1 the identical marking shape window connection of two length
The edge at one angle of faying surface.In the other embodiments of the application, be also possible to other main roads coupling coupling window 2 or
The cross-linked coupling window 2 of person uses L-type window.
Embodiment six
As shown in figure 11, the present embodiment and the difference of embodiment five are, the coupling window 2 or/and intersection of main road coupling
The L-type window number of the coupling window 2 of coupling is two.
Specifically, the second coupling window uses two L-type windows, the second resonant structure 6 and third resonance in the present embodiment
The position at two angles on the surface in portion 7 sets the coupling window 2 there are two L-type, and the coupling window 2 of each L-type is by two length phases
Same marking shape window, which is connected to, to be constituted.In the other embodiments of the application, be also possible to other main roads coupling coupling window 2 or
The cross-linked coupling window 2 of person is using as the setting the second coupling window.
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 dielectric waveguide filter for improving harmonic performance, it is characterised in that: be located at including dielectric and at least two
Resonant structure on different medium body is coupled between resonant structure by coupling window, and the coupling window setting is in medium
The edge of body.
2. a kind of dielectric waveguide filter for improving harmonic performance according to claim 1, it is characterised in that: the coupling
Window is the coupling window or cross-linked coupling window of main road coupling.
3. a kind of dielectric waveguide filter for improving harmonic performance according to claim 2, it is characterised in that: the medium
Body includes the first noumenon and the second ontology, and the first noumenon includes the 6th resonant structure, the first resonant structure for being arranged successively setting
With the second resonant structure, second ontology includes the 5th resonant structure being correspondingly arranged with the resonant structure on the first noumenon, the 4th humorous
Vibration portion and third resonant structure；
The coupling window includes that the first coupling window, the second coupling window and third couple window, the first coupling window
The surface of first resonant structure and the surface of the 4th resonant structure are set, and the table of the second resonant structure is arranged in the second coupling window
The surface of the 5th resonant structure and the table of the 6th resonant structure is arranged in the surface in face and third resonant structure, the third coupling window
Face, the second coupling window and third coupling window are that main road couples window.
4. a kind of dielectric waveguide filter for improving harmonic performance according to claim 3, it is characterised in that: described first
Coupling window is that secondary road couples window, and the first coupling window is arranged in the surface of the first resonant structure and the 4th resonant structure
Between position.
5. a kind of dielectric waveguide filter for improving harmonic performance according to claim 3, it is characterised in that: further include the
The table that the first noumenon is located at the first resonant structure and the second resonant structure junction is arranged in four coupling windows, the 4th coupling window
On face and the second ontology is located on the surface of third resonant structure and the 4th resonant structure junction, and the 4th coupling window is to hand over
Fork coupling window.
6. a kind of dielectric waveguide filter for improving harmonic performance according to claim 3, it is characterised in that: the medium
Body is equipped with input interface and output interface, and input interface setting is in the first resonant structure, and the output interface setting is the
Six resonant structures.
7. a kind of dielectric waveguide filter for improving harmonic performance according to claim 1, it is characterised in that: the coupling
Window is bar shaped, L-type or Contraband type.
8. a kind of dielectric waveguide filter for improving harmonic performance according to claim 1, it is characterised in that: the coupling
Window is symmetrical along the central axes of dielectric.
9. a kind of radio-frequency module, it is characterised in that: including the described in any item media for improving harmonic performance of such as claim 1-8
Waveguide filter.
10. a kind of base station, it is characterised in that: including radio-frequency module as claimed in claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910615496.6A CN110336102A (en) | 2019-07-09 | 2019-07-09 | A kind of dielectric waveguide filter, radio-frequency module and base station improving harmonic performance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910615496.6A CN110336102A (en) | 2019-07-09 | 2019-07-09 | A kind of dielectric waveguide filter, radio-frequency module and base station improving harmonic performance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112382836A (en) * | 2020-12-03 | 2021-02-19 | 宜宾红星电子有限公司 | Laminated dielectric waveguide filter |
| IT202000019711A1 (en) * | 2020-08-07 | 2022-02-07 | Commscope Italy Srl | METALLIZED FOLDED BROADBAND DIELECTRIC WAVEGUIDE FILTERS |
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| CN210111005U (en) * | 2019-07-09 | 2020-02-21 | 重庆思睿创瓷电科技有限公司 | Dielectric waveguide filter for improving harmonic performance, radio frequency module and base station |
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| IT202000019711A1 (en) * | 2020-08-07 | 2022-02-07 | Commscope Italy Srl | METALLIZED FOLDED BROADBAND DIELECTRIC WAVEGUIDE FILTERS |
| CN112382836A (en) * | 2020-12-03 | 2021-02-19 | 宜宾红星电子有限公司 | Laminated dielectric waveguide filter |
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