CN110504512A - A kind of capacitive coupling structure and the dielectric filter using the structure - Google Patents
A kind of capacitive coupling structure and the dielectric filter using the structure Download PDFInfo
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- CN110504512A CN110504512A CN201910679168.2A CN201910679168A CN110504512A CN 110504512 A CN110504512 A CN 110504512A CN 201910679168 A CN201910679168 A CN 201910679168A CN 110504512 A CN110504512 A CN 110504512A
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- capacitive coupling
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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
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Abstract
The present invention relates to the dielectric filters of a kind of capacitive coupling structure and the application structure.Capacitive coupling structure is arranged at least two dielectric resonators, if two dielectric resonators are a unit；Debugging hole is offered on two dielectric resonator ontologies on a unit, the debugging hole is blind hole；It is also formed with flowering structure, offers at least one negative coupling aperture respectively in the upper and lower surfaces of the ontology of two neighboring dielectric resonator link position, the negative coupling aperture is blind hole, and the depth of each negative coupling aperture is no more than the depth for debugging hole.The present invention is by exchanging the reasonable setting of prospect hole and negative coupling aperture, so that the coefficient of coup adjustable extent of capacitive coupling structure of the invention is bigger, technical application range can be wider, while debugging convenient for the later period, has good market application prospect.
Description
Technical field
The present invention relates to the dielectric filters of a kind of capacitive coupling structure and the application structure, are related to communication device technology
Field.
Background technique
It is increasingly developed with mobile communication technology, the advantages that dielectric filter is because of its miniaturization, lightweight, low-loss by
Gradually cause the concern of people.Dielectric filter is by integrally formed high dielectric constant ceramic structure surface metalation
Come what is realized, it is not necessarily to metal cavity, the more above two filter of volume and weight is all much smaller.Further, since media ceramic
Q value of material is high, and temperature drift characteristic is good, and dielectric filter is also kept in terms of the filtering performances such as loss, working frequency stability
Advantage.Therefore, the mainstream that dielectric filter becomes future mobile communication system selects.Dielectric filter mainly has multiple realities
Heart dielectric resonator is constituted, and realizes filtering performance by the coupling before resonator.Frequency selectivity is the important of filter
One of parameter.The frequency selectivity of dielectric filter is improved, the number of dielectric resonator can be increased.But this method
It will lead to the increase of dielectric filter size and loss.Certain frequency points near filter pass band introduce transmission zero, Ke Yi
The frequency selectivity of filter is not effectively improved under the premise of increasing circuit size.In order to form transmission zero, need to control each
Coupling polarity between a resonator is coupled as inductive coupling between that is, certain resonators, the coupling between other resonators
For capacitive coupling.In dielectric filter, inductive coupling can be realized easily by coupling window.However, capacitive coupling is then
It is not easy to realize.In order to realize capacitive coupling, current dielectric filter uses structure as depicted in figs. 1 and 2, i.e., at two
Single blind hole capacitive coupling structure part of at least one surface metalation is realized between dielectric resonator.However, generally for realization
Sizeable coupling, the depth requirements of this single blind hole are greater than the depth for debugging the debugging blind hole of dielectric resonator resonance frequency
Degree.Since its depth is excessive, it will cause later period debugging inconvenient.Therefore, it is proposed for dielectric filter a kind of convenient for later period tune
The capacitive coupling structure of examination is very necessary.
Summary of the invention
The present invention is effectively formed capacitive coupling and is convenient in view of the foregoing drawbacks, and it is an object of the present invention to provide a kind of structurally reasonable
The capacitive coupling structure and filter of later period debugging.
Thus the technical solution adopted by the present invention is that: a kind of capacitive coupling structure, be arranged at least two dielectric resonators,
If two dielectric resonators are a unit；
Debugging hole is offered on two dielectric resonator ontologies on a unit, the debugging hole is blind hole；
It is also formed with flowering structure, is opened respectively in the upper and lower surfaces of the ontology of two neighboring dielectric resonator link position
Equipped at least one negative coupling aperture, the negative coupling aperture is blind hole, and the depth of each negative coupling aperture is no more than the debugging hole
Depth.
Further, there are two the negative coupling apertures for setting on adjacent two dielectric resonators ontology, corresponding to be arranged two
The upper and lower surfaces of the ontology of a dielectric resonator link position, for upper negative coupling aperture and lower negative coupling aperture.
Further, the upper negative coupling aperture and lower negative coupling aperture face setting, and upper negative coupling aperture and lower negative coupling aperture
Shape is consistent, depth is inconsistent.
Further, the part of the debugging hole surface is not covered by conductive layer.
Further, the part of the negative coupling hole surface is not covered by conductive layer.
The application of the capacitive coupling structure, the capacitive coupling structure are applied on filter.
A kind of dielectric filter using the capacitive coupling structure, the filter include being made of solid dielectric material
Ontology, be covered on the conductive layer of the body surface, and the capacitive coupling structure of shaping filter in the manner described above.
Further, the solid dielectric material can be ceramics.
The invention has the advantages that the present invention is by exchanging the reasonable setting of prospect hole and negative coupling aperture, so that electricity of the invention
The coefficient of coup adjustable extent for holding coupled structure is bigger, and technical application range can be wider, while debugging convenient for the later period, has very
Good market application prospect.
Detailed description of the invention
The schematic three dimensional views of Fig. 1 single blind hole capacitive coupling structure in the prior art.
The diagrammatic cross-section of Fig. 2 single blind hole capacitive coupling structure in the prior art.
The schematic three dimensional views of Fig. 3 capacitive coupling structure the first implementation in double blind hole provided by the invention.
The diagrammatic cross-section of Fig. 4 capacitive coupling structure the first implementation in double blind hole provided by the invention.
The coefficient of coup of the mono- blind hole capacitive coupling of Fig. 5 and capacitive coupling the first implementation in double blind hole provided by the invention
Curve comparison figure.
The structural schematic diagram of Fig. 6 capacitive coupling structure second of implementation in double blind hole provided by the invention.
The coefficient of coup curve graph of second of implementation of Fig. 7 capacitive coupling.
Fig. 8 dielectric filter first provided by the invention designs the structural schematic diagram of example.
Fig. 9 dielectric filter first provided by the invention designs the simulation result of example.
Figure 10 dielectric filter second provided by the invention designs the structural schematic diagram of example.
Figure 11 dielectric filter second provided by the invention designs the simulation result of example.
Specific embodiment
Further refinement explanation is made to the present invention with reference to the accompanying drawing, more preferably to understand technical solution of the present invention and phase
Shutdown reason:
The invention proposes a kind of double blind hole capacitive coupling structure, (the first realization sides of capacitive coupling as shown in Figure 3 and Figure 4
Formula).Each dielectric resonator includes the ontology made of solid dielectric material and the debugging hole positioned at body surface, the debugging
Hole is blind hole, for debugging the dielectric resonator resonance frequency where it.In the dielectric resonator 1 and 2 of two surface metalations
Between at least introduce a pair of opposite negative coupling aperture in blind hole structure form, that is, go up blind hole and lower blind hole (referred to as double blind
Hole).Wherein upper blind hole is located at the surface where two debugging blind holes 1 and 2, and lower blind hole is located at opposite with surface where upper blind hole
Surface.The location of upper and lower blind hole is connected with two dielectric resonators, and equal surface metalation.The depth of upper and lower blind hole
Can be equal, can also be unequal, respectively less than or equal to the depth for debugging blind hole, debugged convenient for the later period.Upper and lower blind hole position can
With face, can also be staggered.
It should be understood that of the invention mainly focuses on: 1) negative coupling aperture is multi-blind hole structure, it is contemplated that production
Cost and actual use demand, the preferential structure type for using double blind hole；In view of the convenience of processing and the needs of performance,
Upper and lower blind hole preferentially uses same shape (such as be cylindrical, rectangular, its axis is on the same line at this time) but depth
Inconsistent structure type, upper blind hole at this time is with lower blind hole in addition to remaining inconsistent size of depth can be consistent also different
It causes, such as its diameter can be equally also different when being cylindrical, but finally forms different set according further to actual conditions
Count structure；Further can be as needed, formed multiple standards debugging hole and negative coupling aperture capacitive coupling structure, with into
The stability and consistency for reducing production cost and guaranteeing product quality of one step；How blind its certain main innovative point be
The technical characteristic in hole, remaining is made optimization on this basis and extends；2) depth relationship between negative coupling aperture and debugging hole,
Depth of the depth of i.e. each negative coupling aperture no more than debugging hole；When the depth in each debugging hole is inconsistent, each negative coupling aperture
Depth is no more than the depth in depth minimum debugging hole, and on this basis, the depth between negative coupling aperture and debugging hole is closed
System can be optimized according to the actual situation, standard may finally be formed, to improve the consistency and stability of product.
On the basis of the above description, in order to verify technical effect acquired by structure of the invention, we carry out it
Emulation and the extraction of the coefficient of coup, and compared with the extraction result of single blind hole capacitive coupling structure, as shown in Figure 5.Its
In,dIt is the distance between upper and lower blind hole top for double blind pore structure, is surface where single blind hole for single blind hole structure
Distance of the apparent surface to single blind hole top.The coefficient of coup is negative, and representative is capacitive coupling.It can be seen that provided by the invention
The coefficient of coup adjustable extent of double blind hole capacitive coupling structure is bigger, and technical application range can be wider.In addition, withdIncreasing
Greatly, the coupling absolute value of this double blind hole capacitive coupling structure is gradually increased.
Introduced blind hole up and down is not limited to cylindrical body in the capacitive coupling structure of above-mentioned double blind hole, can be arbitrary shape
Shape, while its position is also possible to have offset.In order to verify, we are again to double blind hole as shown in FIG. 6 capacitive coupling structure
(second of implementation of capacitive coupling) has carried out the extraction of the coefficient of coup.The result of extraction is as shown in fig. 7, whereindStill generation
The distance between upper and lower blind hole top of table.The coefficient of coup withdThe general trend of variation is similar in Fig. 5.It has been found, however, that
IndWhen lesser (< 0.65mm), the coefficient of coup is positive value and inductive coupling.This is because the positional shift in double blind hole is to whole
Body structure side, and the integrally-built other side will form biggish inductive coupling.IndWhen < 0.65mm, the electricity of double blind hole formation
Hold coupling very little, inductive coupling occupies leading position, reflected total to be coupled as inductive coupling.WhendNear 0.65mm
When, inductive coupling and capacitive coupling is cancelled out each other, i.e., coupling amount is 0.As d > 0.65mm, the capacitive coupling that double blind hole is formed is accounted for
According to leading position, embody it is total be coupled as capacitive coupling, and with the increase of d, the coupling of this double blind hole capacitive coupling structure
Absolute value is closed also to be gradually increased.
Dielectric filter design structure:
The capacity coupled two kinds of implementations in above-mentioned double blind hole will be utilized below, provide the design example of dielectric filter respectively,
And clear, complete description is carried out to its technical solution.
It is as shown in Figure 8 that dielectric filter first provided by the invention designs example.The dielectric filter includes two feeds
Structure, each feed structure are made of a coupling slot and a feed cylinder, and the coupling slot 1 in Fig. 8 and feed cylinder 1 form
One feed structure, coupling slot 2 and feed cylinder 2 form another feed structure；The dielectric filter also contains at least two band
There is the dielectric resonator of debugging blind hole, containing there are four dielectric resonators in Fig. 8；The dielectric filter further includes at least one Fig. 3
With the double blind hole capacitive coupling structure of the first implementation in Fig. 4, such as the double blind hole capacitive coupling 1 in Fig. 8, upper and lower two
The depth of blind hole is respectively less than the debugging hole 2 of its two sides and debugs the depth in hole 3；The dielectric filter further includes in dielectric filter
Body surfaces, the conductive layer for debugging hole surface and double blind hole surface, wherein debugging hole and double blind hole surface can whole metals
Change, it can also be partially metallised.Specifically, the depth of the blind hole up and down in double blind hole capacitive coupling 1 can be according to actual needs
The frequency of such as transmission zero is designed.In general, two transmission two o'clocks may be implemented in a double blind hole capacitive coupling structure, such as
The number of transmission zero need to be increased, then can increase the capacity coupled number in double blind hole in dielectric filter.Specifically, above-mentioned lead
Electric layer can be metalization layer, and wherein metal can be silver, can also select other metals according to actual needs.
Fig. 9 gives the simulation result that dielectric filter first provided by the invention designs example.It can be seen that the medium
The filter pass band of filter introduces a transmission zero from 3400MHz to 3600MHz, on the both sides close to passband respectively, tests
The feasibility and practicability of capacitive coupling the first implementation in double blind hole provided by the invention are demonstrate,proved.
Further, Figure 10 gives the medium based on double blind hole provided by the invention second of implementation of capacitive coupling
Filter second designs example, and the design of dielectric filter first example provided in principle and structure to Fig. 8 is similar, different
Point is that used capacitive coupling structure is double blind hole second of implementation of capacitive coupling that Fig. 6 is provided.
Figure 11 gives the simulation result that dielectric filter second provided by the invention designs example.It can be seen that Jie
The filter pass band of matter filter introduces a transmission zero from 3400MHz to 3600MHz, on the both sides close to passband respectively,
Demonstrate the feasibility and practicability of double blind hole provided by the invention second of implementation of capacitive coupling.
It should be noted that delectric filter main innovation point of the invention is to refer to new capacitive coupling structure,
The other structures of filter make corresponding selection and optimization on this basis, above-mentioned only to list several specific structure shapes
Formula is not formed to definitions relevant of the invention.
Claims (8)
1. a kind of capacitive coupling structure, which is characterized in that be arranged at least two dielectric resonators, if two dielectric resonators are
One unit；
Debugging hole is offered on two dielectric resonator ontologies on a unit, the debugging hole is blind hole；
It is also formed with flowering structure, is opened respectively in the upper and lower surfaces of the ontology of two neighboring dielectric resonator link position
Equipped at least one negative coupling aperture, the negative coupling aperture is blind hole, and the depth of each negative coupling aperture is no more than the debugging hole
Depth.
2. a kind of capacitive coupling structure according to claim 1, which is characterized in that set on adjacent two dielectric resonators ontology
The negative coupling aperture, the upper surface of the corresponding ontology that two dielectric resonator link positions are set and following table there are two setting
Face, for upper negative coupling aperture and lower negative coupling aperture.
3. a kind of capacitive coupling structure according to claim 1 or 2, which is characterized in that the upper negative coupling aperture and lower negative
The setting of coupling aperture face, and upper negative coupling aperture is consistent with lower negative coupling hole shape, depth is inconsistent.
4. a kind of capacitive coupling structure according to claim 1, which is characterized in that it is described debugging hole surface part not by
Conductive layer covering.
5. a kind of capacitive coupling structure according to claim 1, which is characterized in that the part of the negative coupling hole surface is not
It is covered by conductive layer.
6. a kind of application of capacitive coupling structure described in any of the above-described claim, which is characterized in that the capacitive coupling structure
It applies on filter.
7. a kind of dielectric filter using capacitive coupling structure described in any of the above-described claim, which is characterized in that the filter
Wave device includes the ontology made of solid dielectric material, is covered on the conductive layer of the body surface, and shape in the manner described above
At the capacitive coupling structure of filter.
8. dielectric filter according to claim 7, which is characterized in that the solid dielectric material is ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910679168.2A CN110504512A (en) | 2019-07-25 | 2019-07-25 | A kind of capacitive coupling structure and the dielectric filter using the structure |
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| CN201910679168.2A CN110504512A (en) | 2019-07-25 | 2019-07-25 | A kind of capacitive coupling structure and the dielectric filter using the structure |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111129667A (en) * | 2019-11-25 | 2020-05-08 | 江苏希奥飞尔微电子科技有限公司 | Negative coupling structure applied to dielectric waveguide filter and dielectric waveguide filter |
| CN111342181A (en) * | 2019-12-23 | 2020-06-26 | 瑞声科技(新加坡)有限公司 | Dielectric waveguide filter |
| CN111403866A (en) * | 2020-04-14 | 2020-07-10 | 广东国华新材料科技股份有限公司 | Dielectric waveguide filter and novel capacitive coupling structure |
| CN111478003A (en) * | 2020-06-03 | 2020-07-31 | 安徽浩源恒方通信技术有限公司 | Capacitance coupling structure of dielectric waveguide filter |
| WO2021127933A1 (en) * | 2019-12-23 | 2021-07-01 | 瑞声声学科技(深圳)有限公司 | Dielectric waveguide filter |
| WO2021129133A1 (en) * | 2019-12-25 | 2021-07-01 | 中兴通讯股份有限公司 | Cross-coupled dielectric filter and device |
| WO2021135643A1 (en) * | 2019-12-31 | 2021-07-08 | 江苏灿勤科技股份有限公司 | Dielectric filter, radio transceiver device, and base station with same |
| WO2021135644A1 (en) * | 2019-12-31 | 2021-07-08 | 江苏灿勤科技股份有限公司 | Dielectric filter, radio transceiver device and base station |
| WO2022000590A1 (en) * | 2020-06-30 | 2022-01-06 | 瑞声声学科技(深圳)有限公司 | Capacitive and inductive cross coupling structure and dielectric waveguide filter |
| WO2022000620A1 (en) * | 2020-06-30 | 2022-01-06 | 瑞声声学科技(深圳)有限公司 | Capacitive coupling structure and dielectric waveguide filter |
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2019
- 2019-07-25 CN CN201910679168.2A patent/CN110504512A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111129667A (en) * | 2019-11-25 | 2020-05-08 | 江苏希奥飞尔微电子科技有限公司 | Negative coupling structure applied to dielectric waveguide filter and dielectric waveguide filter |
| CN111129667B (en) * | 2019-11-25 | 2021-02-12 | 江苏希奥飞尔微电子科技有限公司 | Negative coupling structure applied to dielectric waveguide filter and dielectric waveguide filter |
| CN111342181A (en) * | 2019-12-23 | 2020-06-26 | 瑞声科技(新加坡)有限公司 | Dielectric waveguide filter |
| WO2021127933A1 (en) * | 2019-12-23 | 2021-07-01 | 瑞声声学科技(深圳)有限公司 | Dielectric waveguide filter |
| WO2021129133A1 (en) * | 2019-12-25 | 2021-07-01 | 中兴通讯股份有限公司 | Cross-coupled dielectric filter and device |
| WO2021135643A1 (en) * | 2019-12-31 | 2021-07-08 | 江苏灿勤科技股份有限公司 | Dielectric filter, radio transceiver device, and base station with same |
| WO2021135644A1 (en) * | 2019-12-31 | 2021-07-08 | 江苏灿勤科技股份有限公司 | Dielectric filter, radio transceiver device and base station |
| CN111403866A (en) * | 2020-04-14 | 2020-07-10 | 广东国华新材料科技股份有限公司 | Dielectric waveguide filter and novel capacitive coupling structure |
| CN111478003A (en) * | 2020-06-03 | 2020-07-31 | 安徽浩源恒方通信技术有限公司 | Capacitance coupling structure of dielectric waveguide filter |
| WO2022000590A1 (en) * | 2020-06-30 | 2022-01-06 | 瑞声声学科技(深圳)有限公司 | Capacitive and inductive cross coupling structure and dielectric waveguide filter |
| WO2022000620A1 (en) * | 2020-06-30 | 2022-01-06 | 瑞声声学科技(深圳)有限公司 | Capacitive coupling structure and dielectric waveguide filter |
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