CN110459843A - A kind of dielectric waveguide filter - Google Patents
A kind of dielectric waveguide filter Download PDFInfo
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- CN110459843A CN110459843A CN201910780618.7A CN201910780618A CN110459843A CN 110459843 A CN110459843 A CN 110459843A CN 201910780618 A CN201910780618 A CN 201910780618A CN 110459843 A CN110459843 A CN 110459843A
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- 239000003989 dielectric material Substances 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 4
- 230000008878 coupling Effects 0.000 claims description 15
- 238000010168 coupling process Methods 0.000 claims description 15
- 238000005859 coupling reaction Methods 0.000 claims description 15
- 238000006880 cross-coupling reaction Methods 0.000 abstract description 9
- 230000005764 inhibitory process Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 13
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 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
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Classifications
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- 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
- H01P7/00—Resonators of the waveguide type
- H01P7/10—Dielectric resonators
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Abstract
The present invention relates to a kind of dielectric waveguide filters, including ontology made of solid dielectric material, it is set to two dielectric resonators of the ontology, described two dielectric resonators are respectively provided with resonance hole, the outer surface of the ontology is conductive shielding layer, the outer surface of ontology includes first surface, and the open end in the resonance hole of two dielectric resonators is respectively positioned on the first surface of the ontology；The dielectric waveguide filter further includes the first negative coupled striplines for being set to the first surface, and the first negative coupled striplines are located between the resonance hole of described two dielectric resonators, and the first negative coupled striplines form non-conductive shield region.The capacitive cross coupling of dielectric waveguide filter can be achieved in the present invention, effectively improves low side inhibition, at low cost, small in size.
Description
[technical field]
The present invention relates to a kind of communication equipment devices, more particularly, to a kind of dielectric waveguide filter.
[background technique]
Filter is the critical component in communication system.With the development of communication system, it is desirable that filter miniaturization, light weight
Change.Compared to traditional metal waveguide filter, the dielectric waveguide filter based on high dielectric constant ceramic material has compact
The advantages of volume and higher q values is a kind of miniaturization solution well.
In order to realize high inhibition, filter needs plus cross-coupling, realizes transmission zero, Lai Tigao Out-of-band rejection, capacitive
Cross-coupling realizes low side zero point, improves low side and inhibits, and perceptual cross-coupling realizes high-end zero point, improves high-end inhibition.Medium
Waveguide filter, it is more difficult compared to metal waveguide filter when realizing negative coupling zero point.To realize capacitive in the industry at present
Cross-coupling generally realized by cascading bridging metal probe outside medium or increasing by zero cavity configuration in port cavity, these modes
So that the overall structure of filter is more complicated or increases the volume of filter.
[summary of the invention]
The object of the present invention is to realize the capacitive cross coupling of dielectric waveguide filter using another technical solution.
For this purpose, the present invention provides a kind of dielectric waveguide filter, including ontology made of solid dielectric material, it is set to institute
Two dielectric resonators of ontology are stated, described two dielectric resonators are respectively provided with resonance hole, and the outer surface of the ontology is to lead
Shield layer, the outer surface of ontology include first surface, and the open end in the resonance hole of two dielectric resonators is respectively positioned on described
The first surface of body；The dielectric waveguide filter further includes the first negative coupled striplines for being set to the first surface, described
First negative coupled striplines are located between the resonance hole of described two dielectric resonators, and the first negative coupled striplines form non-conductive
Shielding area.
Further, the shape of the described first negative coupled striplines is Z-shaped, S-shaped, L shape or 5 shapes.
Further, between the length direction of the described first negative coupled striplines and the resonance hole of described two dielectric resonators
The intersection or parallel of line direction.
Further, the described first negative coupled striplines include master tape line and the subband from master tape thread end extension
Line, the line direction between the master tape line and the resonance hole of described two dielectric resonators are intersected or parallel.
Further, the subband line includes the first subband line and the second subband line, the first subband line and the second pair
It is stretched out respectively from two ends of the master tape line with line.
Further, the dielectric waveguide filter further includes the first through hole and the second through-hole through the ontology, institute
It states first through hole and the second through-hole is located at the two sides of the described first negative coupled striplines, and the first through hole and the second through-hole
It is respectively positioned between the resonance hole of described two dielectric resonators.
Further, the outer surface of the ontology includes the second surface opposite with the first surface；The medium wave
Waveguide filter further includes the second negative coupled striplines for being set to the second body surface, and the second negative coupled striplines form non-
Conductive shield region.
Further, the dielectric waveguide filter further includes passing through along the line direction of the first surface, second surface
The first through hole and the second through-hole of the ontology are worn, the first negative coupled striplines and the second negative coupled striplines are respectively positioned on described
Between one through-hole and the second through-hole.
Further, described two dielectric resonators are respectively first medium resonator and second medium resonator, described
The resonance hole of first medium resonator and second medium resonator is respectively the first resonance hole, the second resonance hole.
Further, described two dielectric resonators are respectively first medium resonator and third dielectric resonator, described
The resonance hole of first medium resonator and third dielectric resonator is respectively the first resonance hole, third resonance hole；The medium wave
Waveguide filter further includes the second medium resonator and window coupled structure for being set to the ontology, the second medium resonator
Except the line of the first medium resonator and third dielectric resonator, the window coupled structure is located at described first
So that the first medium resonance within the region that dielectric resonator, second medium resonator and third dielectric resonator surround
Device, second medium resonator and third dielectric resonator form main coupling.
The present invention passes through the first negative coupled striplines of setting, so as in first medium resonator and second medium resonator
Between generate negative coupling, capacitive cross coupling is realized, so that dielectric waveguide filter can form biography in passband low side
Defeated zero point effectively improves low side inhibition, and simplifies manufacturing process, reduces costs, and not will increase Medium Wave Guide filter
The volume of wave device ensure that the miniaturization of dielectric waveguide filter and effectively reduce the sacrifice to Q value.
[Detailed description of the invention]
Fig. 1 is a kind of structural schematic diagram for dielectric waveguide filter that first embodiment of the invention provides；
Fig. 2 is a kind of structural schematic diagram of alternative of the first negative coupled striplines of dielectric waveguide filter shown in Fig. 1；
Fig. 3 is a kind of structural schematic diagram for dielectric waveguide filter that second embodiment of the invention provides；
Fig. 4 is a kind of structural schematic diagram of alternative of the first negative coupled striplines of dielectric waveguide filter shown in Fig. 3；
Fig. 5 is a kind of structural schematic diagram for dielectric waveguide filter that third embodiment of the invention provides；
Fig. 6 is a kind of structural schematic diagram of alternative of the first negative coupled striplines of dielectric waveguide filter shown in Fig. 5；
Fig. 7 is a kind of structural schematic diagram for dielectric waveguide filter that fourth embodiment of the invention provides；
Fig. 8 is a kind of structural schematic diagram of alternative of the first negative coupled striplines of dielectric waveguide filter shown in Fig. 7；
Fig. 9 is a kind of structural schematic diagram for dielectric waveguide filter that fifth embodiment of the invention provides；
Figure 10 is a kind of structural schematic diagram for dielectric waveguide filter that sixth embodiment of the invention provides；
Figure 11 is a kind of structural schematic diagram for dielectric waveguide filter that seventh embodiment of the invention provides；
Figure 12 is a kind of structural schematic diagram for dielectric waveguide filter that eighth embodiment of the invention provides；
Figure 13 is a kind of structural schematic diagram for dielectric waveguide filter that ninth embodiment of the invention provides.
[specific embodiment]
The invention will be further described with reference to the accompanying drawings and examples.
First embodiment
With reference to Fig. 1, a kind of dielectric waveguide filter provided by the invention, including solid dielectric material such as ceramics etc. are made
Ontology 10, be set to two dielectric resonators of ontology 10.Two dielectric resonators are respectively provided with resonance hole.Two media are humorous
The device that shakes is respectively first medium resonator 11 and second medium resonator 12.First medium resonator 11 and second medium resonator
It is connected with each other between 12.
The resonance hole of first medium resonator 11 is the first resonance hole 111, the resonance Kong Wei of second medium resonator 12
Two resonance holes 121.First resonance hole 111 and the second resonance hole 121 are blind hole, and the first resonance hole 111 is humorous for first medium
The adjusting of the resonance frequency of vibration device 11, adjusting of the second resonance hole 121 for the resonance frequency of second medium resonator 12, passes through
Adjust the first resonance hole 111, first medium resonator 11, second medium resonator may be implemented in the depth in the second resonance hole 121
12 resonance frequency.
The outer surface of ontology 10 is conductive shielding layer.The outer surface of ontology 10 include first surface 101 and with the first table
The opposite second surface in face 101.In the present embodiment, first surface 101 is the top surface of ontology 10, the bottom of second surface, that is, ontology 10
Face.The open end in the first resonance hole 111 and the second resonance hole 121 is located at the first surface 101 of ontology 10.First resonance hole 111,
The inner surface in the second resonance hole 121 is conductive shielding layer.Conductive shielding layer is, for example, silver layer, layers of copper etc. metalization layer.
Dielectric waveguide filter further includes the first negative coupled striplines 20 for being set to first surface 101, the first negative strap
Line 20 is between the first resonance hole 111 and the second resonance hole 121, and more specifically, the first negative coupled striplines 20 are located at first
Junction between dielectric resonator 11 and second medium resonator 12.First negative coupled striplines 20 form non-conductive shield area
Domain makes two dielectric resonators for realizing the capacitive coupling between first medium resonator 11 and second medium resonator 12
Between generate negative coupling, to realize capacitive cross coupling, thus the dielectric waveguide filter can passband low side formed one
A transmission zero, to effectively improve low side inhibition, while the setting of the first negative coupled striplines 20 not will increase medium wave
The volume of waveguide filter, it is ensured that the miniaturization of dielectric waveguide filter and effectively reduce sacrifice to Q value.First negative coupling
Crossed belt line 20 forms non-conductive shield region.The mode that first negative coupled striplines 20 form non-conductive shield region is by this
The first surface 101 of body 10 removes a part according to the shape of the first negative coupled striplines 20 using the modes such as laser, polishing, etching
Conductive shielding layer is formed by, and is simplified the manufacturing process of the first negative coupled striplines 20, is improved yield rate, reduce product at
This.
The shape of the negative coupled striplines 20 of the first of the present embodiment is approximate Z-shaped.The length direction of first negative coupled striplines 20
Line direction between the first resonance hole 111 and the second resonance hole 121 is intersected, preferably orthogonal.It is negative by first in the present invention
The direction definition parallel with the width direction of ontology 10 of coupled striplines 20 is the length direction of the first negative coupled striplines 20, by the
The direction definition parallel with the length direction of ontology 10 of one negative coupled striplines 20 is the width direction of the first negative coupled striplines 20.
It is humorous with the first resonance hole 111, second respectively by adjusting the length of the first negative coupled striplines 20 and the first negative coupled striplines 20
Shake the distance between hole 121, thus it is possible to vary the capacitive coupling amount between first medium resonator 11 and second medium resonator 12
Size, it can change the power of capacitive cross coupling.
First negative coupled striplines 20 include master tape line 21 and from 21 end of master tape line extend subband line, master tape line 21 with
Line direction intersection between first resonance hole 111 and the second resonance hole 121, it is preferably orthogonal.Subband line includes the first subband
Line 22 and the second subband line 23, the first subband line 22 and the second subband line 23 are stretched out from two ends of master tape line 21 respectively, and
The direction of stretching is different, it is possible to understand that the direction that ground, the first subband line 22 and the second subband line 23 stretch out is also possible to identical.
In the present embodiment, the first subband line 22 is stretched out towards the direction close to the first resonance hole 111, and the second subband line 23 is humorous towards close second
The direction in vibration hole 121 is stretched out.First subband line 22 is identical with shape, the size of the second subband line 23, it is possible to understand that ground, first is secondary
Shape, size with line 22 and the second subband line 23 are also possible to different.The shape of first subband line 22, the second subband line 23
Shape, size are not construed as limiting the invention.
Fig. 2 is a kind of structural representation of alternative of the first negative coupled striplines 20 of dielectric waveguide filter shown in Fig. 1
Figure.In Fig. 2, shape, the size of the first negative coupled striplines 20 are identical as shape, the size of the first negative coupled striplines 20 of Fig. 1, no
With the company between the length direction and the first resonance hole 111 and the second resonance hole 121 of the negative coupled striplines 20 of the first of Fig. 2
Line direction is parallel.Line direction between master tape line 21 and the first resonance hole 111 and the second resonance hole 121 is parallel.First subband
Line 22 and the second subband line 23 are stretched out towards the direction of two length sides close to first surface 101 respectively.
In other embodiments, the length direction of the first negative coupled striplines 20 and the first resonance hole 111 and the second resonance
Line direction between hole 121 may not be orthogonal or parallel, i.e., the length direction of the first negative coupled striplines 20 is also possible to
Line direction between the first resonance hole 111 and the second resonance hole 121 is in an angle.
Second embodiment
With reference to Fig. 3, the present embodiment different from the first embodiment, the shape of the negative coupled striplines 20 of the first of the present embodiment
For S-shaped.Line direction between the length direction and the first resonance hole 111 and the second resonance hole 121 of first negative coupled striplines 20
Intersection, it is preferably orthogonal.
Fig. 4 is a kind of structural representation of alternative of the first negative coupled striplines 20 of dielectric waveguide filter shown in Fig. 3
Figure.In Fig. 4, shape, the size of the first negative coupled striplines 20 are identical as shape, the size of the first negative coupled striplines 20 of Fig. 3, no
With the company between the length direction and the first resonance hole 111 and the second resonance hole 121 of the negative coupled striplines 20 of the first of Fig. 4
Line direction is parallel.
In other embodiments, the length direction of the first negative coupled striplines 20 and the first resonance hole 111 and the second resonance
Line direction between hole 121 may not be orthogonal or parallel, i.e., the length direction of the first negative coupled striplines 20 is also possible to
Line direction between the first resonance hole 111 and the second resonance hole 121 is in an angle.
3rd embodiment
With reference to Fig. 5, the present embodiment different from the first embodiment, the shape of the negative coupled striplines 20 of the first of the present embodiment
For L shape.Line direction between the length direction and the first resonance hole 111 and the second resonance hole 121 of first negative coupled striplines 20
Intersection, it is preferably orthogonal.First negative coupled striplines 20 include master tape line 21 and stretch out from one of end of master tape line 21
Subband line 24.Master tape line 21 intersects with the line direction in the first resonance hole 111 and the second resonance hole 121, preferably orthogonal.It is secondary
It is stretched out with line 24 towards the direction close to the second resonance hole 121.Subband line 24 is perpendicular to master tape line 21.
Fig. 6 is a kind of structural representation of alternative of the first negative coupled striplines 20 of dielectric waveguide filter shown in Fig. 5
Figure.In Fig. 6, shape, the size of the first negative coupled striplines 20 are identical as shape, the size of the first negative coupled striplines 20 of Fig. 5, no
With the company between the length direction and the first resonance hole 111 and the second resonance hole 121 of the negative coupled striplines 20 of the first of Fig. 6
Line direction is parallel.Master tape line 21 is parallel with the line direction in the first resonance hole 111 and the second resonance hole 121.Subband line 24 is towards leaning on
The direction of one of length sides of nearly first surface 101 is stretched out.
In other embodiments, the length direction of the first negative coupled striplines 20 and the first resonance hole 111 and the second resonance
Line direction between hole 121 may not be orthogonal or parallel, i.e., the length direction of the first negative coupled striplines 20 is also possible to
Line direction between the first resonance hole 111 and the second resonance hole 121 is in an angle.
Fourth embodiment
With reference to Fig. 7, the present embodiment different from the first embodiment, the shape of the negative coupled striplines 20 of the first of the present embodiment
For 5 shapes.Line direction between the length direction and the first resonance hole 111 and the second resonance hole 121 of first negative coupled striplines 20
Intersection, it is preferably orthogonal.
Fig. 8 is a kind of structural representation of alternative of the first negative coupled striplines 20 of dielectric waveguide filter shown in Fig. 7
Figure.In Fig. 8, shape, the size of the first negative coupled striplines 20 are identical as shape, the size of the first negative coupled striplines 20 of Fig. 7, no
With the company between the length direction and the first resonance hole 111 and the second resonance hole 121 of the negative coupled striplines 20 of the first of Fig. 8
Line direction is parallel.
In other embodiments, the length direction of the first negative coupled striplines 20 and the first resonance hole 111 and the second resonance
Line direction between hole 121 may not be orthogonal or parallel, i.e., the length direction of the first negative coupled striplines 20 is also possible to
Line direction between the first resonance hole 111 and the second resonance hole 121 is in an angle.
5th embodiment
With reference to Fig. 9, the present embodiment different from the first embodiment, the dielectric waveguide filter of the present embodiment further includes edge
The first through hole 31 of ontology 10, the second through-hole 32 are run through in the first surface 101 of ontology 10 and the line direction of second surface.First
Through-hole 31 and the second through-hole 32 are located at the two sides of the first negative coupled striplines 20, and first through hole 31 and the equal position of the second through-hole 32
Between the first resonance hole 111 and the second resonance hole 121.Specifically, first through hole 31, the second through-hole 32 are located at master tape line 21
Two sides, and first through hole 31, close to the first subband line 22, the second through-hole 32 is close to the second subband line 23.First through hole 31, second
The inner surface of through-hole 32 is conductive shielding layer.The setting of first through hole 31, the second through-hole 32 can adjust first medium resonator
Capacitive coupling amount between 11 and second medium resonator 12.First through hole 31, shape, the size of the second through-hole 32 are identical.It can
To understand ground, first through hole 31, shape, the size of the second through-hole 32 are identical can also be different.In the present embodiment, first through hole
31, the shape of the second through-hole 32 is circle, it is possible to understand that ground, first through hole 31, the shape of the second through-hole 32 can also be it
He.
Sixth embodiment
With reference to Figure 10, the present embodiment different from the first embodiment, the dielectric waveguide filter of the present embodiment further includes
It is set to the second negative coupled striplines 40 of 10 second surface of ontology.Second negative coupled striplines 40 form non-conductive shield region.The
The two negative formation of coupled striplines 40 non-conductive shield regions are identical as the mode that the first negative coupled striplines 20 are formed by the way of,
It is to be gone using modes such as laser, polishing, etchings according to the shape of the second negative coupled striplines 40 by the second surface in ontology 10
Except a part of conductive shielding layer is formed by, the manufacturing process of the second negative coupled striplines 40 is simplified, yield rate is improved, reduced
Product cost.The shapes of second negative coupled striplines 40, size and between the first resonance hole 111 and the second resonance hole 121
The direction of setting is identical as the first negative coupled striplines 20, i.e., the second negative coupled striplines 40 are corresponding with the first negative coupled striplines 20
's.It is to be appreciated that the shape of the second negative coupled striplines 40, size and the first resonance hole 111 and the second resonance hole 121 it
Between the direction that is arranged be also possible to the first negative coupled striplines 20 it is not identical.Second negative coupled striplines 40 and the first negative coupled striplines
20 is parallel.The setting of second negative coupled striplines 40, can enhance between first medium resonator 11 and second medium resonator 12
Capacitive coupling amount.
7th embodiment
With reference to Figure 11, unlike sixth embodiment, the dielectric waveguide filter of the present embodiment further includes the present embodiment
First through hole 31, the second through-hole 32 along the first surface 101 of ontology 10 and the line direction of second surface through ontology 10.The
One negative coupled striplines 20 and the second negative coupled striplines 40 are respectively positioned between first through hole 31 and the second through-hole 32.Specifically, first
Through-hole 31, the second through-hole 32 are located at the master tape line of the master tape line 21 of the first negative coupled striplines 20, the second negative coupled striplines 40
41 two sides, and first through hole 31 close to the first subband line 22 of the first negative coupled striplines 20, the second negative coupled striplines 40
One subband line 42, the second through-hole 32 close to the second subband line 23 of the first negative coupled striplines 20, the second negative coupled striplines 40
Two subband lines 43.First through hole 31, the second through-hole 32 inner surface be conductive shielding layer.First through hole 31, the second through-hole 32
Setting can further adjust the capacitive coupling amount between first medium resonator 11 and second medium resonator 12.First through hole
31, shape, the size of the second through-hole 32 are identical.It is to be appreciated that shape, the size of first through hole 31, the second through-hole 32 can also
With difference.In the present embodiment, first through hole 31, the shape of the second through-hole 32 are circle, it is possible to understand that ground, first through hole 31,
The shape of second through-hole 32 can also be other.
In other embodiments, the first negative coupled striplines 20, the second negative coupled striplines 40 shape can also be other
Shape, such as T shape, 8 shapes etc..First negative coupled striplines 20, the second negative coupled striplines 40 shape can according to the actual situation into
Row setting.
8th embodiment
With reference to Figure 12, the present embodiment different from the first embodiment, two dielectric resonators of the present embodiment are respectively
First medium resonator 11, third dielectric resonator 13.The resonance hole of first medium resonator 11 and third dielectric resonator 13
Respectively the first resonance hole 111, third resonance hole 131.First negative coupled striplines 20 are located at the first resonance hole 111 and third resonance
Between hole 131, more specifically, the first negative coupled striplines 20 be located at first medium resonator 11 and third dielectric resonator 13 it
Between junction.Dielectric waveguide filter further includes the second medium resonator 12 and window coupled structure for being set to ontology 10
50。
It is connected with each other between first medium resonator 11, second medium resonator 12 and third dielectric resonator 13.Second
Dielectric resonator 12 is located at except the line of first medium resonator 11, third dielectric resonator 13.
Window coupled structure 50 is located at first medium resonator 11, second medium resonator 12 and third dielectric resonator 13
So that first medium resonator 11, second medium resonator 12 and third dielectric resonator 13 form main coupling within the region surrounded
It closes.Window coupling is passed sequentially through between first medium resonator 11, second medium resonator 12 and third dielectric resonator 13
Structure 50 carries out couple electromagnetic wave energy.Window coupled structure 50 is preferably along the line side of first surface 101 and second surface
It is the rectangular through holes of semicircle to the both ends through ontology 10.
Dielectric waveguide filter further includes being set to the input connector 61 of first medium resonator 11 and being set to third
The out connector 62 of dielectric resonator 13.Input connector 61 and the open end in the first resonance hole 111 towards identical.Output
Connector 62 and the open end in third resonance hole 131 towards identical.Input connector 61, out connector 62 is used for and other
The electrical connection of radio frequency electric equipment, plays the role of input, output signal.
The dielectric waveguide filter of the present embodiment can form one in passband low side by the first negative coupled striplines 20 of setting
A transmission zero, to effectively improve low side inhibition.
9th embodiment
With reference to Figure 13, the present embodiment different from the first embodiment, two dielectric resonators of the present embodiment are respectively
First medium resonator 11, the 4th dielectric resonator 14.The resonance hole of first medium resonator 11 and the 4th dielectric resonator 14
Respectively the first resonance hole 111, the 4th resonance hole 141.First negative coupled striplines 20 are located at the first resonance hole 111 and the 4th resonance
Between hole 141, more specifically, the first negative coupled striplines 20 be located at first medium resonator 11 and the 4th dielectric resonator 14 it
Between junction.Dielectric waveguide filter further includes the second medium resonator 12 for being set to ontology 10, third dielectric resonator
13 and window coupled structure 50.
First medium resonator 11, second medium resonator 12, third dielectric resonator 13 and the 4th dielectric resonator 14
Between be connected with each other.Second medium resonator 12, third dielectric resonator 13 are located at first medium resonator 11 and the 4th medium
Except the line of resonator 14.
Window coupled structure 50 is located at first medium resonator 11, second medium resonator 12, third dielectric resonator 13
So that first medium resonator 11, second medium resonator 12, third are situated between within the region surrounded with the 4th dielectric resonator 14
Matter resonator 13 and the 4th dielectric resonator 14 form main coupling.That is first medium resonator 11, second medium resonator 12,
Window coupled structure 50 is passed sequentially through between three dielectric resonators 13 and the 4th dielectric resonator 14 carries out couple electromagnetic wave energy.
Window coupled structure 50 is preferably the T shape through-hole for running through ontology 10 along the line direction of first surface 101 and second surface.
Dielectric waveguide filter further includes being set to the input connector 61 of first medium resonator 11 and being set to the 4th
The out connector 62 of dielectric resonator 14.Input connector 61 and the open end in the first resonance hole 111 towards identical.Output
Connector 62 and the open end in the 4th resonance hole 141 towards identical.Input connector 61, out connector 62 is used for and other
The electrical connection of radio frequency electric equipment, plays the role of input, output signal.
The dielectric waveguide filter of the present embodiment in passband low side and can be led to by the first negative coupled striplines 20 of setting
With one transmission zero of high-end each formation, to effectively improve low side inhibition and high-end inhibition.
In other embodiments, the dielectric resonance of other quantity can also be arranged in the ontology 10 of dielectric waveguide filter
Device, such as the dielectric resonator of the above quantity such as five, six.
Above embodiments only express the preferred embodiment of the present invention, and the description thereof is more specific and detailed, but can not
Therefore limitations on the scope of the patent of the present invention are interpreted as.It should be pointed out that for those of ordinary skill in the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, such as special to the difference in each embodiment
Sign is combined, and these are all within the scope of protection of the present invention.
Claims (10)
1. a kind of dielectric waveguide filter, including ontology made of solid dielectric material, it is set to two media of the ontology
Resonator, it is characterised in that: described two dielectric resonators are respectively provided with resonance hole, and the outer surface of the ontology is conductive shield
Layer, the outer surface of ontology include first surface, and the open end in the resonance hole of two dielectric resonators is respectively positioned on the of the ontology
One surface；The dielectric waveguide filter further includes the first negative coupled striplines for being set to the first surface, and described first is negative
Coupled striplines are located between the resonance hole of described two dielectric resonators, and the first negative coupled striplines form non-conductive shield area
Domain.
2. dielectric waveguide filter according to claim 1, which is characterized in that the shape of the first negative coupled striplines is
Z-shaped, S-shaped, L shape or 5 shapes.
3. dielectric waveguide filter according to claim 1, which is characterized in that the length side of the first negative coupled striplines
Intersect to the line direction between the resonance hole of described two dielectric resonators or parallel.
4. dielectric waveguide filter according to claim 1, which is characterized in that the first negative coupled striplines include master tape
Line and the subband line extended from the master tape thread end, between the master tape line and the resonance hole of described two dielectric resonators
The intersection or parallel of line direction.
5. dielectric waveguide filter according to claim 4, which is characterized in that the subband line include the first subband line and
Second subband line, the first subband line and the second subband line are stretched out from two ends of the master tape line respectively.
6. dielectric waveguide filter according to claim 1, which is characterized in that the dielectric waveguide filter further includes passing through
The first through hole and the second through-hole of the ontology are worn, the first through hole and the second through-hole are located at the described first negative strap
The two sides of line, and the first through hole and the second through-hole are respectively positioned between the resonance hole of described two dielectric resonators.
7. dielectric waveguide filter according to claim 1, which is characterized in that the outer surface of the ontology include with it is described
The opposite second surface of first surface；The dielectric waveguide filter further includes be set to the second body surface second negative
Coupled striplines, the second negative coupled striplines form non-conductive shield region.
8. dielectric waveguide filter according to claim 7, which is characterized in that the dielectric waveguide filter further includes edge
The first surface, second surface line direction run through the ontology first through hole and the second through-hole, the first negative coupling
Crossed belt line and the second negative coupled striplines are respectively positioned between the first through hole and the second through-hole.
9. dielectric waveguide filter according to claim 1, which is characterized in that described two dielectric resonators are respectively
The resonance hole of one dielectric resonator and second medium resonator, the first medium resonator and second medium resonator is respectively
First resonance hole, the second resonance hole.
10. dielectric waveguide filter according to claim 1, which is characterized in that described two dielectric resonators are respectively
Distinguish in the resonance hole of first medium resonator and third dielectric resonator, the first medium resonator and third dielectric resonator
For the first resonance hole, third resonance hole；The dielectric waveguide filter further includes the second medium resonance for being set to the ontology
Device and window coupled structure, the second medium resonator are located at the company of the first medium resonator and third dielectric resonator
Except line, the window coupled structure is located at the first medium resonator, second medium resonator and third dielectric resonator
So that the first medium resonator, second medium resonator and third dielectric resonator form main coupling within the region surrounded
It closes.
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| CN111146543A (en) * | 2020-01-20 | 2020-05-12 | 成都北斗天线工程技术有限公司 | Cavity filter filled with medium |
| CN111463529A (en) * | 2020-01-19 | 2020-07-28 | 武汉凡谷陶瓷材料有限公司 | Capacitive coupling device and filter |
| WO2021031356A1 (en) * | 2019-08-22 | 2021-02-25 | 深圳国人科技股份有限公司 | Dielectric waveguide filter |
| CN114843723A (en) * | 2021-01-30 | 2022-08-02 | 上海华为技术有限公司 | Band-stop filter and multi-stop band filter |
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