CN110690541A - Novel dielectric filter coupling structure - Google Patents
Novel dielectric filter coupling structure Download PDFInfo
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- CN110690541A CN110690541A CN201911039853.5A CN201911039853A CN110690541A CN 110690541 A CN110690541 A CN 110690541A CN 201911039853 A CN201911039853 A CN 201911039853A CN 110690541 A CN110690541 A CN 110690541A
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- 230000008878 coupling Effects 0.000 title claims abstract description 79
- 238000010168 coupling process Methods 0.000 title claims abstract description 79
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 79
- 230000003071 parasitic effect Effects 0.000 abstract description 5
- 238000004891 communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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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 invention discloses a novel dielectric filter coupling structure, which comprises a dielectric filter body, a first blind hole and a second blind hole, wherein the first blind hole and the second blind hole are arranged at the same side of the dielectric filter body, the first blind hole and the second blind hole and a medium on the dielectric filter body form two dielectric resonators, a negative coupling hole is arranged between the two dielectric resonators, the openings of the negative coupling hole, the first debugging hole and the second debugging hole are positioned on the same surface of the dielectric filter body, one end of the negative coupling hole penetrates through the dielectric filter body, the other end of the negative coupling hole is a closed end, a boss is arranged in the negative coupling hole, the boss and the dielectric filter body are of an integral structure, and continuous conducting layers are arranged on the inner wall of the negative coupling hole and the outer wall of the boss. The invention can realize the control of the frequency of the far-end parasitic passband while realizing the capacitive coupling.
Description
Technical Field
The invention relates to a novel dielectric filter coupling structure, and belongs to the technical field of communication.
Background
With the increasing development of wireless communication technology, wireless communication base stations are distributed more and more densely, the volume requirement of the base stations is smaller and smaller, wherein the volume ratio of a radio frequency front-end filter module in the base stations is larger, and therefore the volume requirement of the filter is smaller and smaller. However, when the volume of the metal coaxial cavity filter is reduced, it is found that: the smaller the filter volume, the higher the surface current, the higher the losses and the lower the power carrying capacity, i.e. the smaller the power capacity. That is, as the volume of the metal coaxial cavity filter is reduced, its performance index is deteriorated. At present, a miniaturized filter, that is, a solid dielectric filter is widely used, but a structure for realizing capacitive coupling (or called negative coupling) in the solid dielectric filter is complex, the process realization difficulty is high, and a parasitic passband is easily generated at a frequency close to the passband, so that how to provide a dielectric filter with a simple structure and low process difficulty becomes a research direction of a person skilled in the art.
Disclosure of Invention
The invention aims to provide a novel dielectric filter coupling structure which can realize capacitive coupling and control of far-end parasitic passband frequency.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a novel dielectric filter coupled structure, includes dielectric filter body, first blind hole and second blind hole set up in the homonymy of dielectric filter body, medium on first blind hole and the dielectric filter body of second blind hole and the dielectric filter forms two dielectric resonator, be equipped with a burden coupling hole between two dielectric resonator, the opening in burden coupling hole and first debugging hole and second debugging hole is located the same surface of dielectric filter body, burden coupling hole one end runs through the dielectric filter body, and the other end is the blind end, the downthehole boss that is equipped with of burden coupling, boss and dielectric filter body structure as an organic whole, burden coupling hole inner wall is equipped with continuous conducting layer with the boss outer wall.
The further improved scheme in the technical scheme is as follows:
1. in the above scheme, the negative coupling hole and the boss are of a coaxial structure.
2. In the above scheme, the surface of the dielectric filter body is provided with the conductive layer which is connected with the conductive layer on the inner wall of the negative coupling hole.
3. In the above scheme, the inner walls of the first blind hole and the second blind hole are provided with conducting layers which are connected with the conducting layers on the inner walls of the negative coupling holes.
4. In the scheme, the depth of the negative coupling hole is 1.1 ~ 1.2.2 times of the depth of the first blind hole.
5. In the above scheme, the inner diameter of the negative coupling hole is larger than the inner diameters of the first blind hole and the second blind hole.
6. In the above solution, the boss diameter is about 1/3 ~ 1/2 of the negative coupling hole.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the dielectric filter coupling structure realizes capacitive coupling, realizes control on the frequency of a far-end parasitic passband, and can avoid harmonic waves generated at the low end of the passband.
2. The invention relates to a dielectric filter coupling structure, wherein a negative coupling hole is arranged between two dielectric resonators, the negative coupling hole and openings of a first debugging hole and a second debugging hole are positioned on the same surface of a dielectric filter body, one end of the negative coupling hole penetrates through the dielectric filter body, the other end of the negative coupling hole is a closed end, a boss is arranged in the negative coupling hole, the boss and the dielectric filter body are of an integral structure, continuous conducting layers are arranged on the inner wall of the negative coupling hole and the outer wall of the boss, the strength of negative coupling is controlled by adjusting the diameter and the height of the boss, the diameter of the boss is 1/3 ~ 1/2 of the negative coupling hole, the boss can be determined according to process realization and required coupling, the height of the boss is about 10% ~ 100% of the depth of the coupling hole, generally speaking, the height of the boss in the inner part is higher, the larger the diameter can form larger loading capacitance, and the local electric field strength is stronger.
Drawings
Fig. 1 is a schematic diagram of a coupling structure of a dielectric filter according to the present invention.
In the above drawings: 1. a dielectric filter body; 2. a first blind hole; 3. a second blind hole; 4. a negative coupling aperture; 5. and (4) a boss.
Detailed Description
In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.
Example 1: the utility model provides a novel dielectric filter coupled structure, includes dielectric filter body 1, first blind hole 2 and second blind hole 3 set up in dielectric filter body 1's homonymy, first blind hole 2 and second blind hole 3 form two dielectric resonator with the medium on the dielectric filter body 1, be equipped with a burden coupling hole 4 between two dielectric resonator, burden coupling hole 4 is located dielectric filter body 1 same surface with the opening of first debugging hole 2 and second debugging hole 3, 4 one end in burden coupling hole runs through dielectric filter body 1, and the other end is the blind end, be equipped with a boss 5 in the burden coupling hole 4, boss 5 and dielectric filter body 1 structure as an organic whole, 4 inner walls in burden coupling hole and 5 outer walls in boss are equipped with continuous conducting layer.
The negative coupling hole 4 and the boss 5 are of a coaxial structure.
The surface of the dielectric filter body 1 is provided with a conductive layer which is connected with the conductive layer on the inner wall of the negative coupling hole 4.
And the inner walls of the first blind hole 2 and the second blind hole 3 are provided with conducting layers which are connected with the conducting layers on the inner walls of the negative coupling holes 4.
The depth of the negative coupling hole 4 is 1.1 times of the depth of the first blind hole 2.
Example 2: the utility model provides a novel dielectric filter coupled structure, includes dielectric filter body 1, first blind hole 2 and second blind hole 3 set up in dielectric filter body 1's homonymy, first blind hole 2 and second blind hole 3 form two dielectric resonator with the medium on the dielectric filter body 1, be equipped with a burden coupling hole 4 between two dielectric resonator, burden coupling hole 4 is located dielectric filter body 1 same surface with the opening of first debugging hole 2 and second debugging hole 3, 4 one end in burden coupling hole runs through dielectric filter body 1, and the other end is the blind end, be equipped with a boss 5 in the burden coupling hole 4, boss 5 and dielectric filter body 1 structure as an organic whole, 4 inner walls in burden coupling hole and 5 outer walls in boss are equipped with continuous conducting layer.
The surface of the dielectric filter body 1 is provided with a conductive layer which is connected with the conductive layer on the inner wall of the negative coupling hole 4.
The depth of the negative coupling hole 4 is 1.2 times of the depth of the first blind hole 2.
The inner diameter of the negative coupling hole 4 is larger than the inner diameters of the first blind hole 2 and the second blind hole 3.
The boss diameter is about 1/3 ~ 1/2 of the negative coupling hole.
When the novel dielectric filter coupling structure is adopted, the control on the frequency of the far-end parasitic passband is realized while the capacitive coupling is realized.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (7)
1. A novel dielectric filter coupling structure is characterized in that: comprises a dielectric filter body (1), a first blind hole (2) and a second blind hole (3), the first blind hole (2) and the second blind hole (3) are arranged at the same side of the dielectric filter body (1), the first blind hole (2) and the second blind hole (3) and the medium on the dielectric filter body (1) form two dielectric resonators, a negative coupling hole (4) is arranged between the two dielectric resonators, the negative coupling hole (4) and the openings of the first debugging hole (2) and the second debugging hole (3) are positioned on the same surface of the dielectric filter body (1), one end of the negative coupling hole (4) penetrates through the dielectric filter body (1), the other end is a closed end, a boss (5) is arranged in the negative coupling hole (4), the boss (5) and the dielectric filter body (1) are of an integral structure, and continuous conducting layers are arranged on the inner wall of the negative coupling hole (4) and the outer wall of the boss (5).
2. The novel dielectric filter coupling structure of claim 1, wherein: the negative coupling hole (4) and the boss (5) are of a coaxial structure.
3. The novel dielectric filter coupling structure of claim 1, wherein: and the surface of the dielectric filter body (1) is provided with a conducting layer which is connected with the conducting layer on the inner wall of the negative coupling hole (4).
4. The novel dielectric filter coupling structure of claim 1, wherein: and the inner walls of the first blind hole (2) and the second blind hole (3) are provided with conducting layers which are connected with the conducting layers on the inner walls of the negative coupling holes (4).
5. The novel dielectric filter coupling structure of claim 1, wherein the depth of the negative coupling hole (4) is 1.1 ~ 1.2.2 times the depth of the first blind hole (2).
6. The novel dielectric filter coupling structure of claim 1, wherein: the inner diameter of the negative coupling hole (4) is larger than the inner diameters of the first blind hole (2) and the second blind hole (3).
7. The novel dielectric filter coupling structure of claim 1, wherein the diameter of the boss (5) is about 1/3 ~ 1/2 of the negative coupling hole (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911039853.5A CN110690541A (en) | 2019-10-29 | 2019-10-29 | Novel dielectric filter coupling structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911039853.5A CN110690541A (en) | 2019-10-29 | 2019-10-29 | Novel dielectric filter coupling structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111883886A (en) * | 2020-07-06 | 2020-11-03 | 武汉凡谷电子技术股份有限公司 | Dielectric filter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07245508A (en) * | 1994-03-04 | 1995-09-19 | Murata Mfg Co Ltd | Dielectric filter |
| KR101357027B1 (en) * | 2013-01-10 | 2014-02-04 | 세원텔레텍 주식회사 | Dual mode rf filter using the reentrant cavity dielectric resonator |
| CN108598635A (en) * | 2013-05-31 | 2018-09-28 | 华为技术有限公司 | Dielectric filter, transceiver and base station |
| CN210489793U (en) * | 2019-10-29 | 2020-05-08 | 苏州海瓷达材料科技有限公司 | Novel dielectric filter coupling structure |
-
2019
- 2019-10-29 CN CN201911039853.5A patent/CN110690541A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07245508A (en) * | 1994-03-04 | 1995-09-19 | Murata Mfg Co Ltd | Dielectric filter |
| KR101357027B1 (en) * | 2013-01-10 | 2014-02-04 | 세원텔레텍 주식회사 | Dual mode rf filter using the reentrant cavity dielectric resonator |
| CN108598635A (en) * | 2013-05-31 | 2018-09-28 | 华为技术有限公司 | Dielectric filter, transceiver and base station |
| CN210489793U (en) * | 2019-10-29 | 2020-05-08 | 苏州海瓷达材料科技有限公司 | Novel dielectric filter coupling structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111883886A (en) * | 2020-07-06 | 2020-11-03 | 武汉凡谷电子技术股份有限公司 | Dielectric filter |
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