CN206806474U - A kind of dielectric filter - Google Patents
A kind of dielectric filter Download PDFInfo
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- CN206806474U CN206806474U CN201720105679.XU CN201720105679U CN206806474U CN 206806474 U CN206806474 U CN 206806474U CN 201720105679 U CN201720105679 U CN 201720105679U CN 206806474 U CN206806474 U CN 206806474U
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- medium block
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Abstract
The utility model discloses a kind of dielectric filter, including medium block, outer conductor and inner wire are provided with medium block, one end of inner wire, which has on one of surface of medium block around open electrode and open electrode, is provided with the open zone for isolating open electrode with outer conductor, the other end of inner wire turns on outer conductor, the input/output electrode isolated with outer conductor and coupled with inner wire is additionally provided with medium block, inner wire includes two composition bodies being arranged side by side, open electrode is positioned close to one end of one of composition body of input/output electrode, the other end of the composition body is turned on one end of another composition body and isolated with outer conductor, the other end of another composition body turns on outer conductor；This is equivalent to that existing dielectric filter is fractureed and is stacked together from centre, and two sections are electrically connected to form resonator, so that dielectric filter can obtain lower frequency with shorter length, contributes to device miniaturization and reduces cost.
Description
Technical field
Wave filter technology field is the utility model is related to, more particularly to a kind of dielectric filter.
Background technology
The major advantage of dielectric filter (Dielectric filter) is that power capacity is big, and insertion loss is low, but is situated between
The resonator of matter wave filter uses the resonance manner of TEM moulds, refers to Fig. 1 and Fig. 2, and Fig. 1 is dielectric filter in the prior art
Front view, Fig. 2 is the rearview of dielectric filter in the prior art, and current dielectric filter includes medium block, medium block
Outer surface on be provided with outer conductor 100, be provided with medium block in through hole 300 and through hole 300 and be provided with inner wire structure
Into resonator, one end of inner wire has around open electrode 400 and open electrode 400 on one of surface of medium block
The open zone 500 for isolating open electrode 400 with outer conductor 100 is provided with, the other end and the outer conductor 100 of inner wire turn on,
The input/output electrode 200a and 200b isolated with outer conductor 100 and input/output electricity are additionally provided with the outer surface of medium block
200a and 200b are coupled with inner wire for pole, and physical length corresponding to above-mentioned resonator is closed with frequency and the dielectric constant of material
System is L=75000/ (ER1/2* frequency), wherein, L is resonator length, and in units of mm, 75000 be constant, and ER refers to medium
The dielectric constant of wave filter material therefor, frequency is in units of MHz, as can be seen that frequency is smaller from above-mentioned formula, resonator
Also it is longer, when frequency it is low to a certain extent when, the length of dielectric filter will be grown very much, need when in use in PCB main board
It is upper to reserve sizable plane space, the installation site of other electronic components is easily influenceed, causes equipment volume bigger than normal, cost increases
Add, bring many unnecessary troubles in design, in production.
Therefore, how to improve dielectric filter, make it while with lower frequency, shorten length, turn into this area
Technical staff's important technological problems urgently to be resolved hurrily.
Utility model content
In view of this, the utility model provides a kind of dielectric filter, makes it with the same of lower frequency to reach
When, shorten the purpose of length.
To achieve the above object, the utility model provides following technical scheme：
A kind of dielectric filter, including medium block, outer conductor is provided with the outer surface of the medium block, is provided through
Inner wire on the through-hole wall of the medium block, one end of the inner wire have on one of surface of the medium block
Have and be provided with the open zone for isolating the open electrode with the outer conductor around open electrode and the open electrode, it is described
The other end of inner wire turns on the outer conductor, is additionally provided with what is isolated with the outer conductor on the outer surface of the medium block
The input/output electrode and input/output electrode couples with the inner wire, the inner wire include first to be arranged side by side
Body and the second composition body are formed, the open electrode is positioned close to the first composition body of the input/output electrode
First end, it is described first composition body the second end with described second composition body the second end the medium block same table
Turned on face by conductive layer and described first forms the second end of body, the second end of the second composition body and the conduction
Layer is isolated with the outer conductor, and the first end of the second composition body turns on the outer conductor.
Preferably, the medium block is cuboid, and the input/output electrode is arranged on the upper surface of the medium block
On, the first composition body and the second composition body are set on the medium block along upper surface to the stacking of lower surface direction
Put, two exhausting holes for forming the first composition body and the second composition body penetrate from the preceding surface of the medium block
To the rear surface relative with the preceding surface.
Preferably, the input/output electrode is arranged on the edge that the upper surface of the medium block connects with preceding surface,
The open electrode is arranged on the preceding surface of the medium block, and the conductive layer is arranged on the rear surface of the medium block.
Preferably, it is provided with and is used for the input/output electrode and the outer conductor around the input/output electrode
First coating-free area of isolation, and first coating-free area connects with the open zone.
Preferably, outside the second end of the first composition body, the second end of the second composition body and the conductive layer
It is surrounded with the second coating-free area of track type, second coating-free area is by the second end of the described first composition body, described second
The second end and the conductive layer for forming body isolate with the outer conductor.
A kind of dielectric filter, including medium block, outer conductor is provided with the outer surface of the medium block, is provided through
Inner wire on the through-hole wall of the medium block, one end of the inner wire have on one of surface of the medium block
Have and be provided with the open zone for isolating the open electrode with the outer conductor around open electrode and the open electrode, it is described
The other end of inner wire turns on the outer conductor, is additionally provided with what is isolated with the outer conductor on the outer surface of the medium block
The input/output electrode and input/output electrode couples with the inner wire, the inner wire include first be arranged side by side
Body, the second composition body and middle groups adult are formed, the middle groups adult is provided with least one and is arranged side by side in described
Between first composition body and the second composition body, the first end of the middle groups adult is with an adjacent composition body described
Turned on the same surface of medium block by conductive layer, the second end is with another adjacent composition body in the same of the medium block
Turned on surface by conductive layer, the end of the middle groups adult, other composition bodies turned on the middle groups adult
End and conductive layer between the two are isolated with the outer conductor, and the first composition body is close to the input/output electrode
Set and described one end for not being connected with the middle groups adult of first composition body is provided with the open electrode, described second group
The one end of adult not with middle groups adult connection turns on the outer conductor.
Preferably, the medium block is cuboid, and the input/output electrode is arranged on the upper surface of the medium block
On, the first composition body, the second composition body and at least one middle groups adult are on the medium block along upper
Surface is stacked to lower surface direction.
Preferably, the input/output electrode is arranged on the edge that the upper surface of the medium block connects with preceding surface,
The open electrode is arranged on the preceding surface of the medium block, and the conductive layer is arranged on the rear surface of the medium block.
Preferably, it is provided with and is used for the input/output electrode and the outer conductor around the input/output electrode
First coating-free area of isolation, and first coating-free area connects with the open zone.
Preferably, the end of the middle groups adult, the end of other composition bodies electrically connected with the middle groups adult
And the second coating-free area of track type is surrounded with outside conductive layer between the two, second coating-free area be used for will be described in
Between form the end of body, electrically connect with the middle groups adult other form bodies end and conductive layer between the two and
Outer conductor is isolated.
It can be seen from the above technical proposal that dielectric filter provided by the utility model, including medium block, medium block
Outer conductor is provided with outer surface, the inner wire being provided through on the through-hole wall of medium block, one end of inner wire is in medium
Have to be provided with around open electrode and open electrode on one of surface of block and opened what open electrode was isolated with outer conductor
Area is put, the other end of inner wire is turned on outer conductor, and the input isolated with outer conductor/defeated is additionally provided with the outer surface of medium block
Go out electrode and input/output electrode couples with inner wire, wherein, inner wire includes the first composition body and second being arranged side by side
Body is formed, open electrode is positioned close to the first end of the first composition body of input/output electrode, the second end of the first composition body
With second composition body the second end turn on the same surface of medium block by conductive layer and first form body the second end,
Second end of the second composition body and conductive layer are isolated with outer conductor, and the first end of the second composition body turns on outer conductor；
Inner wire in above-mentioned dielectric filter has been divided into two parts, and is turned between two parts by conductive layer, and this is just
Fracture and be stacked together from centre equivalent to by existing dielectric filter, and by conductive layer by two sections of inner wire
Be electrically connected to form resonator, in such manner, it is possible to which the length of dielectric filter is changed into original in the case where keep frequency is constant
Half, add or multiple-layer stacked it is, of course, also possible to which dielectric filter is arranged into three stackings using above-mentioned means, so that medium
Wave filter can obtain lower frequency with shorter length, contribute to device miniaturization and reduce cost.
Brief description of the drawings
, below will be to reality in order to illustrate more clearly of a kind of embodiment of the utility model or technical scheme of the prior art
The required accompanying drawing used in example or description of the prior art is applied to be briefly described, it should be apparent that, drawings in the following description
Only some embodiments of the utility model, for those of ordinary skill in the art, do not paying creative work
Under the premise of, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the front view of dielectric filter in the prior art；
Fig. 2 is the rearview of dielectric filter in the prior art；
Fig. 3 is the front view for the dielectric filter that a kind of embodiment of the utility model provides；
Fig. 4 is the rearview for the dielectric filter that a kind of embodiment of the utility model provides；
Fig. 5 is the front view for the dielectric filter that the utility model another kind embodiment provides；
Fig. 6 is the rearview for the dielectric filter that the utility model another kind embodiment provides.
Embodiment
The utility model provides a kind of dielectric filter, makes it while with lower frequency to reach, and shortens length
The purpose of degree.
Below in conjunction with the accompanying drawing in a kind of embodiment of the utility model, to the technology in a kind of embodiment of the utility model
Scheme is clearly and completely described, it is clear that and described embodiment is only the utility model part of the embodiment, without
It is whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative labor
The every other embodiment obtained under the premise of dynamic, belong to the scope of the utility model protection.
Refer to Fig. 3 and Fig. 4, the front view for the dielectric filter that Fig. 3 provides for a kind of embodiment of the utility model, Fig. 4
The rearview of the dielectric filter provided for a kind of embodiment of the utility model.
The dielectric filter that a kind of embodiment of the utility model provides, including medium block, medium block are generally low from having
Loss, high-k, frequency-temperature coefficient and thermal coefficient of expansion are small, can bear the material of the features such as high power is made,
Currently used material is ceramics.
Outer conductor 1 is provided with the outer surface of medium block, outer conductor 1 is generally silver coating or copper coating, is provided through
Inner wire on the inwall of through hole 6 of medium block, one end of inner wire have open electrode 4 on one of surface of medium block
And the open zone 5 for isolating open electrode 4 with outer conductor 1 is provided with around open electrode 4, the other end of inner wire with leading outside
Body 1 is turned on, and the input/output electrode 2a and 2b isolated with outer conductor 1 and input/output are additionally provided with the outer surface of medium block
Electrode 2a and 2b couple with inner wire.
Wherein, inner wire includes the first composition body being arranged side by side and the second composition body, and open electrode 4, which is arranged on, to be leaned on
The first end of nearly input/output electrode 2a and 2b the first composition body, the of the second end of the first composition body and the second composition body
Two ends are turned on the same surface of medium block by conductive layer 7 and the second end of the first composition body, the of the second composition body
Two ends and conductive layer 7 are isolated with outer conductor 1, and the first end of the second composition body turns on outer conductor 1.
Compared with prior art, dielectric filter provided by the utility model, inner wire have been divided into two parts, and two parts
Between turned on by conductive layer 7, this is equivalent to that existing dielectric filter is fractureed and is stacked together from centre, and passes through
Two sections of inner wire are electrically connected to form resonator by conductive layer 7, in such manner, it is possible to will be situated between in the case where keep frequency is constant
The length of matter wave filter is changed into original half, it is, of course, also possible to which dielectric filter is arranged into three stackings using above-mentioned means
Add or multiple-layer stacked, so that dielectric filter can obtain lower frequency with shorter length, contribute to equipment small-sized
Change and reduce cost.
In a kind of embodiment of the utility model, medium block is cuboid or the shape for being similar to cuboid, input/defeated
Go out electrode 2a and 2b to be arranged on the upper surface of medium block, first forms body and the second composition body on medium block along upper surface
It is stacked to lower surface direction, for forming two exhausting holes 6 of the first composition body and the second composition body before medium block
Surface is penetrated to the rear surface relative with preceding surface.
Certainly, the shape of medium block is not limited in above-mentioned cuboid, can also be cylinder or other shapes etc.
Deng.
Further optimize above-mentioned technical proposal, coupled for ease of input/output electrode 2a and 2b with inner wire, in this practicality
In a kind of new embodiment, input/output electrode 2a and 2b are arranged on the edge that the upper surface of medium block connects with preceding surface,
Open electrode 4 is arranged on the preceding surface of medium block, and conductive layer 7 is arranged on the rear surface of medium block.
In a kind of embodiment of the utility model, as shown in Figure 3, use is provided with around input/output electrode 2a and 2b
In the first coating-free area 3 for isolating input/output electrode 2a and 2b with outer conductor 1, and the first coating-free area 3 and open zone 5
Connection.
In order to avoid in the second end of the first composition body, the second end of the second composition body and conductive layer 7 between the two
Any one turned on outer conductor 1, the problem of so as to cause the total length in resonance hole to reduce, implement the utility model is a kind of
In example, as shown in Figure 4, runway is surrounded with outside the second end of the first composition body, the second end of the second composition body and conductive layer 7
Second end of the first composition body, second are formed the second end of body and led by the second coating-free area 8 of shape, the second coating-free area 8
Electric layer 7 is isolated with outer conductor 1.
Embodiment described above is only that inner wire includes two-part situation, except above-mentioned two layers structure being stacked
Outside, can realize that three stackings add or multiple-layer stacked in manner just described with profit, refer to Fig. 5 and Fig. 6, Fig. 5 be this practicality newly
The front view for the dielectric filter that type another kind embodiment provides, Fig. 6 are the medium that the utility model another kind embodiment provides
The rearview of wave filter.
The utility model another kind embodiment provides a kind of dielectric filter, including the medium block made of ceramics, is situated between
Outer conductor 1 is provided with the outer surface of mass, the inner wire being provided through on the inwall of through hole 6 of medium block, the one of inner wire
End, which has on one of surface of medium block around open electrode 4 and open electrode 4, to be provided with open electrode 4 with leading outside
The open zone 5 that body 1 is isolated, the other end and the outer conductor 1 of inner wire turn on, and is additionally provided with the outer surface of medium block and outer conductor
The input/output electrode 2a and 2b and input/output electrode 2a and 2b of 1 isolation couple with inner wire, and inner wire includes setting side by side
The first composition body, the second composition body and middle groups adult, the middle groups adult put are provided with least one and are arranged side by side in
Between first composition body and the second composition body, i.e., inner wire is at least divided into three sections, the first end of middle groups adult with it is adjacent
One composition body is turned on the same surface of medium block by conductive layer 7, and the second end is being situated between with another adjacent composition body
Turned on the same surface of mass by conductive layer 7, the end of middle groups adult, other composition bodies turned on middle groups adult
End and conductive layer 7 between the two isolate with outer conductor 1, the first composition body is set close to input/output electrode 2a and 2b
Put and first one end for be connected with middle groups adult of composition body be provided with open electrode 4, the second composition body not with middle composition
One end of body connection turns on outer conductor 1.
Shown in Fig. 5 and Fig. 6 is situation when inner wire is divided into three sections, i.e., inner wire includes the first composition body, the
Two composition bodies and a middle groups adult, and the first composition body, the second composition body and a middle groups adult pass through conductive layer 7
Connection forms serpentine configuration.
Further optimize above-mentioned technical proposal, in the utility model another kind embodiment, medium block be cuboid or
It is similar to cuboid, the medium block of this shape is simple in construction, is easy to manufacture and processes；Input/output electrode 2a and 2b are set
On the upper surface of medium block, the first composition body, the second composition body and at least one middle groups adult are on medium block along upper
Surface is stacked to lower surface direction, be can be seen that with reference to Fig. 5 and Fig. 6 for forming the first composition body and middle composition
The through hole 6 of body is through to the rear surface of medium block from the preceding surface of medium block, and is used to being formed the through hole 6 of the second composition body then
Do not run through, one end that the inner wire in the through hole 6 does not turn on middle groups adult can turn on outer conductor 1 nearby.
Identically with former embodiment, in the utility model another kind embodiment, for ease of input/output electrode 2a
With the coupling among 2b and inner wire, input/output electrode 2a and 2b are arranged on the upper surface of medium block and preceding surface connects
Edge, open electrode 4 are arranged on the preceding surface of medium block, and conductive layer 7 is arranged on the rear surface of medium block.
Further optimize above-mentioned technical proposal, in the utility model embodiment, as shown in figure 5, input/output electrode
The first coating-free area 3 for input/output electrode 2a and 2b to be isolated with outer conductor 1, and first are provided with around 2a and 2b
Coating-free area 3 connects with open zone 5.
In the utility model another kind embodiment, the end of middle groups adult, electrically connected with middle groups adult other
Form the second coating-free area 8 that track type is surrounded with outside the end and conductive layer 7 between the two of body, the second coating-free area 8
For by the end of middle groups adult, the end of other composition bodies electrically connected with middle groups adult and conduction between the two
Layer 7 is isolated with outer conductor 1.
Whether in a kind of embodiment provided by the utility model or another embodiment, track type second without painting
Floor area 8 be only a kind of preferred embodiment, be actually not limited to that, as long as can by form body between connection end with
Outer conductor 1 is isolated, and is not limited herein.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (10)
1. a kind of dielectric filter, including medium block, outer conductor is provided with the outer surface of the medium block, is provided through institute
The inner wire on the through-hole wall of mass is given an account of, one end of the inner wire has on one of surface of the medium block
The open zone for isolating the open electrode with the outer conductor is provided with around open electrode and the open electrode, it is described interior
The other end of conductor turns on the outer conductor, be additionally provided with the outer surface of the medium block isolate with the outer conductor it is defeated
Enter/output electrode and the input/output electrode couple with the inner wire, it is characterised in that the inner wire is included side by side
First composition body of arrangement and the second composition body, the open electrode are positioned close to the described of the input/output electrode
The first end of first composition body, the second end of the first composition body form the second end of body in the medium block with described second
Same surface on by conductive layer conducting and it is described first composition body the second end, it is described second composition body the second end with
And the conductive layer is isolated with the outer conductor, the first end of the second composition body turns on the outer conductor.
2. dielectric filter according to claim 1, it is characterised in that the medium block is cuboid, the input/defeated
Go out electrode to be arranged on the upper surface of the medium block, the first composition body and the second composition body are in the medium block
On be stacked along upper surface to lower surface direction, for formed it is described first composition body and it is described second composition body two rows
Through hole is penetrated to the rear surface relative with the preceding surface from the preceding surface of the medium block.
3. dielectric filter according to claim 2, it is characterised in that the input/output electrode, which is arranged on, to be given an account of
The edge that the upper surface of mass connects with preceding surface, the open electrode is arranged on the preceding surface of the medium block, described to lead
Electric layer is arranged on the rear surface of the medium block.
4. according to the dielectric filter described in claim any one of 1-3, it is characterised in that around the input/output electrode
It is provided with the first coating-free area for the input/output electrode to be isolated with the outer conductor, and it is described first uncoated
Area connects with the open zone.
5. according to the dielectric filter described in claim any one of 1-3, it is characterised in that the second of the first composition body
It is surrounded with the second coating-free area of track type outside end, the second end of the second composition body and the conductive layer, described second
Coating-free area by the second end of the described first composition body, the second end of the second composition body and the conductive layer with it is described outer
Conductor is isolated.
6. a kind of dielectric filter, including medium block, outer conductor is provided with the outer surface of the medium block, is provided through institute
The inner wire on the through-hole wall of mass is given an account of, one end of the inner wire has on one of surface of the medium block
The open zone for isolating the open electrode with the outer conductor is provided with around open electrode and the open electrode, it is described interior
The other end of conductor turns on the outer conductor, be additionally provided with the outer surface of the medium block isolate with the outer conductor it is defeated
Enter/output electrode and the input/output electrode couple with the inner wire, it is characterised in that the inner wire is included side by side
The first composition body, the second composition body and middle groups adult set, the middle groups adult are provided with least one and side by side
It is arranged between the first composition body and the second composition body, the first end of the middle groups adult and an adjacent group
Adult is turned on the same surface of the medium block by conductive layer, and the second end is being given an account of with another adjacent composition body
Turned on the same surface of mass by conductive layer, the end of the middle groups adult, turned on the middle groups adult its
He form body end and conductive layer between the two isolate with the outer conductor, the first composition body is close to described defeated
Enter/output electrode set and described one end for be connected with the middle groups adult of first composition body be provided with it is described open electric
Pole, the one end of the second composition body not with middle groups adult connection turn on the outer conductor.
7. dielectric filter according to claim 6, it is characterised in that the medium block is cuboid, the input/defeated
Go out electrode to be arranged on the upper surface of the medium block, the first composition body, the second composition body and at least one institute
Middle groups adult is stated to be stacked along upper surface to lower surface direction on the medium block.
8. dielectric filter according to claim 7, it is characterised in that the input/output electrode, which is arranged on, to be given an account of
The edge that the upper surface of mass connects with preceding surface, the open electrode is arranged on the preceding surface of the medium block, described to lead
Electric layer is arranged on the rear surface of the medium block.
9. according to the dielectric filter described in claim any one of 6-8, it is characterised in that around the input/output electrode
It is provided with the first coating-free area for the input/output electrode to be isolated with the outer conductor, and it is described first uncoated
Area connects with the open zone.
10. according to the dielectric filter described in claim any one of 6-8, it is characterised in that the end of the middle groups adult,
Track type is surrounded with outside the end of other composition bodies electrically connected with the middle groups adult and conductive layer between the two
Second coating-free area, second coating-free area are used to be electrically connected by the end of the middle groups adult, with the middle groups adult
The end of other composition bodies connect and conductive layer between the two are isolated with outer conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720105679.XU CN206806474U (en) | 2017-01-23 | 2017-01-23 | A kind of dielectric filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720105679.XU CN206806474U (en) | 2017-01-23 | 2017-01-23 | A kind of dielectric filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI735204B (en) * | 2020-03-06 | 2021-08-01 | 大陸商廈門松元電子有限公司 | Structured hybrid hetero-wavelength resonant ceramic filter |
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2017
- 2017-01-23 CN CN201720105679.XU patent/CN206806474U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI735204B (en) * | 2020-03-06 | 2021-08-01 | 大陸商廈門松元電子有限公司 | Structured hybrid hetero-wavelength resonant ceramic filter |
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