CN209266539U - 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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- CN209266539U CN209266539U CN201920224386.2U CN201920224386U CN209266539U CN 209266539 U CN209266539 U CN 209266539U CN 201920224386 U CN201920224386 U CN 201920224386U CN 209266539 U CN209266539 U CN 209266539U
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Abstract
The utility model 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 utility model.To improve the design flexibility of dielectric filter.
Description
Technical field
The utility model relates to a kind of dielectric filter coupled structures with symmetrical null characteristic, belong in the communications field
Technical field of electronic components.
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.
Utility model content
The utility model provides a kind of dielectric filter coupled structure with symmetrical null characteristic, not only may be implemented
The symmetrical response curve of zero point can also realize asymmetrical response of the low side zero point close to passband or high-end zero point close to passband
Curve, 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 utility model obtains is: the utility model makes the row of symmetrical zero point by introducing third blind hole
Cloth can be more flexible, and the symmetrical response curve of zero point not only may be implemented, can also realize low side zero point close to passband or
Asymmetrical response curve of the high-end zero point close to passband.To improve the design flexibility of dielectric filter.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
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
The base case of the utility model, in the present solution, the introducing of third blind hole is the pass that the utility model is different from the prior art
Key point, in specific design, the central axes along dielectric filter ontology are adjustable, the position of third blind hole for the position of third blind hole
Setting adjustment causes the position of main coupling (m34) 2 to adjust the adjustment, it can be achieved that cross-coupling (m24), and further realizes medium filter
The adjustment of the symmetrical null characteristic of wave device.
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.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, the utility model can also on the premise of not departing from the spirit and scope of the utility model
There are various changes and modifications, these various changes and improvements fall within the scope of the claimed invention.The utility model is wanted
Protection scope is asked to be defined by appended claims and its equivalent.
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 third blind hole, and be located at and handed over close to one end of the first blind hole, described second
Fork 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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| Application Number | Priority Date | Filing Date | Title |
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| CN201920224386.2U CN209266539U (en) | 2019-02-22 | 2019-02-22 | A kind of dielectric filter coupled structure with symmetrical null characteristic |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920224386.2U CN209266539U (en) | 2019-02-22 | 2019-02-22 | A kind of dielectric filter coupled structure with symmetrical null characteristic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563692A (en) * | 2019-09-25 | 2021-03-26 | 昆明盘甲科技有限公司 | Capacitive coupling structure for dielectric filter |
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2019
- 2019-02-22 CN CN201920224386.2U patent/CN209266539U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563692A (en) * | 2019-09-25 | 2021-03-26 | 昆明盘甲科技有限公司 | Capacitive coupling structure for dielectric filter |
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Granted publication date: 20190816 Effective date of abandoning: 20231208 |
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Granted publication date: 20190816 Effective date of abandoning: 20231208 |