CN109728385A - A kind of dielectric filter coupled structure with symmetrical null characteristic - Google Patents
A kind of dielectric filter coupled structure with symmetrical null characteristic Download PDFInfo
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- CN109728385A CN109728385A CN201910132396.8A CN201910132396A CN109728385A CN 109728385 A CN109728385 A CN 109728385A CN 201910132396 A CN201910132396 A CN 201910132396A CN 109728385 A CN109728385 A CN 109728385A
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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
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
- H01P1/2088—Integrated in a substrate
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Abstract
The present invention relates to a kind of dielectric filter coupled structures with symmetrical null characteristic, including dielectric filter ontology, the dielectric filter ontology is rectangle, the upper surface of dielectric filter ontology is symmetrical arranged along the two sides of central axes there are two the first blind hole, and the upper surface of dielectric filter ontology is provided with the second blind hole along one end of the first blind hole；Medium between the first ipsilateral blind hole and the second blind hole constitute first it is main couple, the medium between two the first main couplings constitutes the first cross-coupling；Third blind hole is equipped between two the second blind holes, third blind hole constitutes the second main coupling, and the medium between two the second blind holes and third blind hole constitutes the second cross-coupling.Asymmetrical response curve of the low side zero point close to passband or high-end zero point close to passband may be implemented by introducing third blind hole in the present invention.To improve the design flexibility of dielectric filter.
Description
Technical field
The present invention relates to a kind of dielectric filter coupled structures with symmetrical null characteristic, belong to the electricity in the communications field
Sub- component technical field.
Background technique
Requirement recently as high-performance and miniaturization to communication equipment is increasing, dielectric filter increasingly by
To attention.But the dielectric filter coupled structure with symmetrical null characteristic before, it is special to be formed by symmetrical zero point arrangement
Property be it is fixed, i.e., the zero point of high side of filter passband is compared with the zero point of low side always closer to passband.
Summary of the invention
The present invention provides a kind of dielectric filter coupled structures with symmetrical null characteristic, and zero point not only may be implemented
Symmetrical response curve can also realize that low side zero point is bent close to the asymmetrical response of passband close to passband or high-end zero point
Line, concrete scheme are as follows:
A kind of dielectric filter coupled structure with symmetrical null characteristic, including dielectric filter ontology, the medium
Filtering body is rectangle, and the upper surface of dielectric filter ontology is symmetrical arranged along the two sides of central axes there are two the first blind hole,
The upper surface of dielectric filter ontology is provided with the second blind hole, the side edge edge of dielectric filter ontology along one end of the first blind hole
It is provided with the first through slot between first blind hole and the second blind hole, dielectric filter ontology is equipped with the between two the first blind holes
Two through slots；Medium between the first ipsilateral blind hole and the second blind hole constitute first it is main couple, two the first main couplings
Between medium constitute the first cross-coupling；Third blind hole is equipped between two the second blind holes, third blind hole constitutes the second main coupling
It closes, the medium between two the second blind holes and third blind hole constitutes the second cross-coupling.
Further, the described first main coupling and the first cross-coupling are magnetic couplings.
Further, the depth of the third blind hole is not less than the 1/2 of dielectric filter body thickness, the second main coupling
It is combined into capacitive coupling.
Further, the axial connecting line of two the second blind holes of axis deviation of the third blind hole, and be located at close to first
One end of blind hole, second cross-coupling are capacitive coupling.
Further, the axial connecting line of two the second blind holes of axis deviation of the third blind hole, and it is located remotely from first
One end of blind hole, and close to the outer end edge of dielectric filter ontology, second cross-coupling is inductive coupled.
Further, the axial connecting line of two the second blind holes of axis deviation of the third blind hole, and it is located remotely from first
One end of blind hole, and close to the axial connecting line of two the second blind holes, the second cross-linked coupling amount is zero.
The beneficial effect that the present invention obtains is: the present invention allows the arrangement of symmetrical zero point more by introducing third blind hole
Add flexibly, the symmetrical response curve of zero point not only may be implemented, low side zero point can also be realized close to passband or high-end zero point
Close to the asymmetrical response curve of passband.To improve the design flexibility of dielectric filter.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram of medium filtering body in embodiment 1；
Fig. 3 is the frequency response curve of medium filtering body in embodiment 1；
Fig. 4 is the structural schematic diagram of medium filtering body in embodiment 2；
Fig. 5 is the frequency response curve of medium filtering body in embodiment 2；
Fig. 6 is the structural schematic diagram of medium filtering body in embodiment 3；
Fig. 7 is the frequency response curve of medium filtering body in embodiment 3.
Specific embodiment
A kind of dielectric filter coupled structure with symmetrical null characteristic as shown in Figure 1, including dielectric filter sheet
Body, consistent with the prior art, ceramic dielectric can be used in dielectric filter ontology.In the present solution, dielectric filter ontology is square
Shape, the upper surface of dielectric filter ontology are symmetrical arranged that there are two the first blind hole 14, dielectric filter sheets along the two sides of central axes
The upper surface of body is provided with the second blind hole 15 along one end of the first blind hole, and in conjunction with the distribution of above-mentioned first blind hole, the second blind hole is same
Sample along the central axes of dielectric filter ontology be symmetrical arranged there are two.The side edge of dielectric filter ontology is along the first blind hole and the
The first through slot 16 is provided between two blind holes, dielectric filter ontology is equipped with the second through slot between two the first blind holes
17；Medium between the first ipsilateral blind hole and the second blind hole constitute first it is main couple, in figure based on couple (m23) 1 He
Main coupling (m45) 3, the medium between two the first main couplings constitute the first cross-coupling, are cross-coupling (m25) 4 in figure；Two
Third blind hole is equipped between a second blind hole, third blind hole constitutes the second main coupling, in figure based on couple (m34) 2, two second
Medium between blind hole and third blind hole constitutes the second cross-coupling, is to intersect (m24) 5 in figure.Above structure is characterized in completing
Base case of the invention, in the present solution, the introducing of third blind hole is the key point that the present invention is different from the prior art, third
In specific design, the central axes along dielectric filter ontology are adjustable for the position of blind hole, and the position adjustment of third blind hole is drawn
The position for playing main coupling (m34) 2 adjusts the adjustment, it can be achieved that cross-coupling (m24), and it is symmetrical to further realize dielectric filter
The adjustment of null characteristic.
Preferably, main coupling (m23) 1 and main coupling (m45) 3 and cross-coupling (m25) 4, for magnetic coupling
It closes.Its coupling amount size is determined that window is bigger, and coupling is stronger, and vice versa, window by the window size of two cavitys of connection
Size is adjusted by the opening width of the first through slot and the second through slot.
Preferably, the depth of third blind hole is not less than the 1/2 of dielectric filter body thickness, main coupling (m34) 2
Depth for capacitive coupling, third blind hole is deeper, and coupling amount is smaller, and vice versa.
Embodiment 1
On the basis of above scheme, in one embodiment, as shown in connection with fig. 2, for realizing main coupling (m34's) 2
If third blind hole is biased to dielectric filter body central, that is, it is biased to one end of the first blind hole, then response curve is as shown in figure 3, height
Closer to passband compared with low side 0. 7, cross-coupling (m24) is capacitive coupling at end 0. 6.As shown in connection with fig. 2, third blind hole
Two the second blind holes of axis deviation axial connecting line offset distance 5 it is bigger, then high-end 0. 6 is right with low side 0. 7
Title property is stronger, and vice versa.
Embodiment 2
In another embodiment, as shown in connection with fig. 4, for realizing main coupling (m34) if 2 third blind hole is biased to medium
The outer end edge of filtering body, then response curve as shown in figure 5, low side 0. 10 compared with high-end 0. 9 closer to passband.Knot
It closing shown in Fig. 4, the offset distance 8 of the axial connecting line of two the second blind holes of axis deviation of third blind hole is bigger, then and high-end 0. 9
Stronger with the asymmetry of low side 0. 10, vice versa.
Embodiment 3
In another embodiment, as shown in connection with fig. 6, for realizing main coupling (m34) if 2 third blind hole is slightly biased to
The outer end edge of dielectric filter ontology, then response curve is as shown in fig. 7, low side 0. 13 and high-end 0. 12 symmetry arrangement.Knot
It closes shown in Fig. 6, the offset distance 11 of the axial connecting line of two the second blind holes of axis deviation of third blind hole is equal to a certain certain number
When value, then high-end 0. 12 with low side 0. 13 with it is essentially equal at a distance from passband, be in symmetry arrangement characteristic.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (6)
1. a kind of dielectric filter coupled structure with symmetrical null characteristic, including dielectric filter ontology, it is characterised in that:
The dielectric filter ontology is rectangle, and the upper surface of dielectric filter ontology is symmetrical arranged that there are two the along the two sides of central axes
The upper surface of one blind hole, dielectric filter ontology is provided with the second blind hole along one end of the first blind hole, dielectric filter ontology
Side edge is provided with the first through slot between the first blind hole and the second blind hole, dielectric filter ontology along two the first blind holes it
Between be equipped with the second through slot；Medium between the first ipsilateral blind hole and the second blind hole constitute first it is main couple, two the
Medium between one main coupling constitutes the first cross-coupling；Third blind hole is equipped between two the second blind holes, third blind hole is constituted
Second main coupling, the medium between two the second blind holes and third blind hole constitute the second cross-coupling.
2. the dielectric filter coupled structure according to claim 1 with symmetrical null characteristic, it is characterised in that: described
First main coupling and the first cross-coupling are magnetic couplings.
3. the dielectric filter coupled structure according to claim 2 with symmetrical null characteristic, it is characterised in that: described
The depth of third blind hole is not less than the 1/2 of dielectric filter body thickness, and second master is coupled as capacitive coupling.
4. the dielectric filter coupled structure according to claim 3 with symmetrical null characteristic, it is characterised in that: described
The axial connecting line of two the second blind holes of axis deviation of three blind holes, and be located at and intersect close to one end of the first blind hole, described second
It is coupled as capacitive coupling.
5. the dielectric filter coupled structure according to claim 3 with symmetrical null characteristic, it is characterised in that: described
The axial connecting line of two the second blind holes of axis deviation of third blind hole, and it is located remotely from one end of the first blind hole, and close to medium
The outer end edge of filtering body, second cross-coupling are inductive coupled.
6. the dielectric filter coupled structure according to claim 3 with symmetrical null characteristic, it is characterised in that: described
The axial connecting line of two the second blind holes of axis deviation of third blind hole, and it is located remotely from one end of the first blind hole, and close to two
The axial connecting line of second blind hole, the second cross-linked coupling amount is zero.
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| CN201910132396.8A CN109728385B (en) | 2019-02-22 | 2019-02-22 | Dielectric filter coupling structure with symmetrical zero characteristic |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112517A (en) * | 2019-06-13 | 2019-08-09 | 无锡惠虹电子有限公司 | A kind of 5G communication single layer dielectric waveguide filter |
| CN110137645A (en) * | 2019-07-01 | 2019-08-16 | 广东国华新材料科技股份有限公司 | A kind of dielectric waveguide filter |
| WO2021003836A1 (en) * | 2019-07-05 | 2021-01-14 | 京信通信技术(广州)有限公司 | Filter and multi-zero-point implementation module thereof |
| EP3985791A4 (en) * | 2019-07-11 | 2022-07-20 | ZTE Corporation | Filter coupling unit and filter |
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| WO2014194477A1 (en) * | 2013-06-04 | 2014-12-11 | 华为技术有限公司 | Dielectric resonator and dielectric filter, transceiver and base station using same |
| CN105633518A (en) * | 2016-01-04 | 2016-06-01 | 张家港保税区灿勤科技有限公司 | Filter for transceiver and base station |
| CN107534197A (en) * | 2015-11-27 | 2018-01-02 | 华为技术有限公司 | Dielectric filter, transceiver and base station |
| CN107994310A (en) * | 2017-11-29 | 2018-05-04 | 深圳市麦捷微电子科技股份有限公司 | A kind of dielectric waveguide filter negative zero point coupled structure |
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2019
- 2019-02-22 CN CN201910132396.8A patent/CN109728385B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101436698A (en) * | 2007-11-16 | 2009-05-20 | 泉州波园射频新技术研究中心 | Microwave low waveband TM010 module high selectivity cavity dielectric filter |
| CN202217763U (en) * | 2011-08-29 | 2012-05-09 | 武汉凡谷电子技术股份有限公司 | Cross coupling device of filter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112517A (en) * | 2019-06-13 | 2019-08-09 | 无锡惠虹电子有限公司 | A kind of 5G communication single layer dielectric waveguide filter |
| CN110137645A (en) * | 2019-07-01 | 2019-08-16 | 广东国华新材料科技股份有限公司 | A kind of dielectric waveguide filter |
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| WO2021003836A1 (en) * | 2019-07-05 | 2021-01-14 | 京信通信技术(广州)有限公司 | Filter and multi-zero-point implementation module thereof |
| EP3985791A4 (en) * | 2019-07-11 | 2022-07-20 | ZTE Corporation | Filter coupling unit and filter |
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| CN109728385B (en) | 2023-12-08 |
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