CN116632475B - Dielectric ceramic filter with penetrating resonant holes and wider bandwidth - Google Patents
Dielectric ceramic filter with penetrating resonant holes and wider bandwidth Download PDFInfo
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- CN116632475B CN116632475B CN202310897054.1A CN202310897054A CN116632475B CN 116632475 B CN116632475 B CN 116632475B CN 202310897054 A CN202310897054 A CN 202310897054A CN 116632475 B CN116632475 B CN 116632475B
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- dielectric ceramic
- ceramic body
- resonant
- hole
- ceramic filter
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- 239000000919 ceramic Substances 0.000 title claims abstract description 79
- 230000000149 penetrating effect Effects 0.000 title claims abstract description 7
- 230000008878 coupling Effects 0.000 claims abstract description 20
- 238000010168 coupling process Methods 0.000 claims abstract description 20
- 238000005859 coupling reaction Methods 0.000 claims abstract description 20
- 230000000694 effects Effects 0.000 claims abstract description 6
- 230000000875 corresponding effect Effects 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 230000002596 correlated effect Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention provides a dielectric ceramic filter with a penetrating resonant hole and wider bandwidth, which comprises a dielectric ceramic body and a conductive layer, wherein the conductive layer is laid on the upper surface, the lower surface, the left surface and the right surface of the dielectric ceramic body and forms a ground plane; the orifice portion of resonance hole one end is equipped with the open road surface, and the orifice portion of the other end is equipped with the short circuit face, and the dielectric ceramic body front surface is equipped with two at least open road surfaces and at least one short circuit face, and open road surface and the short circuit face that is located dielectric ceramic body front surface cross-set for this dielectric ceramic filter not only can utilize open road surface and short circuit face cooperation to realize the coupling bandwidth, can also utilize the cross-finger effect that open road surface and short circuit face cross-formed to further promote the coupling bandwidth, simple structure, convenient regulation, bandwidth are wider.
Description
Technical Field
The invention belongs to the technical field of filters, and particularly relates to a dielectric ceramic filter with a penetrating resonant hole and wider bandwidth.
Background
Generally, resonance Kong Duowei through holes on a dielectric ceramic filter, such as a dielectric ceramic filter of the type disclosed in chinese patent CN218569184U, CN218005215U, CN218569182U, CN113036325A, are coupled by arranging open-circuit surfaces and short-circuit surfaces at two ends of the through holes, but the open-circuit surfaces/short-circuit surfaces of these schemes are all located on the same surface of a dielectric ceramic body, so that the dielectric ceramic filter can only realize coupling bandwidth through cooperation of the open-circuit surfaces and the short-circuit surfaces, the actually formed coupling bandwidth is narrower, the application range is narrower, and when the coupling bandwidth needs to be lifted, complex patterns are required to be arranged on the open-circuit surfaces through metal wires, and the structure is complex and the adjustment degree is smaller.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a dielectric ceramic filter with a penetrating resonant hole and wider bandwidth, which has a simple structure and high adjustment degree.
In order to achieve the above purpose, the technical scheme adopted by the invention is that the dielectric ceramic filter with the penetrating resonant hole and wider bandwidth comprises a dielectric ceramic body and a conductive layer, wherein the dielectric ceramic body is a cuboid extending along the left-right direction, midpoints of four long sides of the dielectric ceramic body are connected into a virtual plane, and the conductive layer is laid on the upper surface, the lower surface, the left surface and the right surface of the dielectric ceramic body to form a grounding surface;
the dielectric ceramic body is provided with a plurality of resonant holes which penetrate through the dielectric ceramic body along the front-back direction, the resonant holes are symmetrically distributed along the virtual plane, and the inner wall of each resonant hole is coated with the conductive layer; the resonance hole is characterized in that an opening surface is arranged at the opening part at one end of the resonance hole, a short circuit surface is arranged at the opening part at the other end of the resonance hole, at least two opening surfaces and at least one short circuit surface are arranged on the front surface of the dielectric ceramic body, and the opening surfaces and the short circuit surfaces are arranged in a staggered manner, so that an interdigital effect can be formed between the opening surfaces and the short circuit surfaces.
Preferably, the short road surface is a conducting layer extending along the up-down direction and electrically connected with the conducting layers on the upper surface and the lower surface of the dielectric ceramic body, the open circuit surface is provided with a conducting ring surrounding the hole part, the conducting ring comprises a circular ring and a rectangular ring, and the conducting ring is electrically connected with the conducting layer on the inner wall of the resonant hole.
Further preferably, the dielectric ceramic filter further comprises input/output electrodes, and the input/output electrodes are electrically connected with the conductive rings at two ends of the front surface of the dielectric ceramic body.
Further preferably, the input/output electrode is disposed on a lower surface of the dielectric ceramic body and is isolated from the ground plane by an L-shaped isolation groove, and the L-shaped isolation groove exposes the dielectric ceramic body.
Further preferably, the conducting layer, the conducting ring and the conducting layer are all silver layers or copper layers.
Preferably, the axes of all the resonant holes are located on the same plane.
Further preferably, the distance between the center lines of the resonance holes corresponding to the open road surface and the short road surface on the front surface of the dielectric ceramic body is inversely related to the coupling bandwidth; when the open road surface and/or the short road surface correspond to the resonance holes, the central line is the axial lead of the resonance hole, and when the open road surface and/or the short road surface correspond to the resonance holes, the central line is the axial lead of the equivalent holes of all the resonance holes corresponding to the open road surface and/or the short road surface.
Further preferably, the axis of the resonance hole is equidistant from the upper surface and the lower surface of the dielectric ceramic body.
Preferably, the thickness of the dielectric ceramic body in the up-down direction is positively correlated with the coupling bandwidth.
Preferably, the pore diameters of all the resonance pores are equal.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the plurality of resonant holes symmetrically distributed along the virtual plane are arranged, the open road surface is arranged at the orifice part at one end of the resonant hole, and the short road surface is arranged at the orifice part at the other end of the resonant hole, so that the coupling bandwidth can be formed by utilizing the open road surfaces at the two ends of the resonant hole and the short road surface; the open circuit surface and the short circuit surface on the front surface of the dielectric ceramic body are staggered, so that the coupling bandwidth can be further improved by utilizing the interdigital effect formed by the staggered open circuit surface and the staggered short circuit surface, and the complex graph is not required to be arranged on the open circuit surface, so that the structure is simple, the adjustment is convenient, and the bandwidth is wider.
Drawings
Fig. 1 is a schematic perspective view of a dielectric ceramic filter according to the prior art.
Fig. 2 is an electrical performance diagram of fig. 1.
Fig. 3 is a schematic perspective view of a preferred embodiment of the present invention.
Fig. 4 is a schematic front view of fig. 3.
Fig. 5 is a schematic rear view of fig. 3.
Fig. 6 is a schematic bottom view of fig. 3.
Fig. 7 is an electrical performance diagram of fig. 3.
Wherein: 10. a dielectric ceramic body; 11. a resonance hole; 20. a conductive layer; 30. a conductive layer; 40 conductive rings; 50. an input/output electrode; l-shaped isolation grooves; 70. a virtual plane.
Detailed Description
As shown in fig. 3 to 7, the dielectric ceramic filter with a through resonant hole and wider bandwidth provided by the present invention has a frequency of 1092.5MHz and a size of 18.0×8.2×5.5mm (length×width×height), and includes a dielectric ceramic body 10 and a conductive layer 20, wherein the dielectric ceramic body 10 is a cuboid extending in a left-right direction, midpoints of four long sides of the dielectric ceramic body 10 are connected to form a virtual plane 70, and the conductive layer 20 is laid on an upper surface, a lower surface, a left surface and a right surface of the dielectric ceramic body 10 to form a ground plane; the dielectric ceramic body 10 is provided with resonant holes 11, the resonant holes 11 penetrate through the dielectric ceramic body 10 and the conductive layers 20 along the front-back direction, the resonant holes 11 are five and symmetrically distributed along the virtual plane 70, and the conductive layers 20 are laid on the inner wall of the resonant holes 11; the orifice portion of the front end of the resonance hole 11 is provided with an open road surface, the orifice portion of the rear end is provided with a short road surface, the front surface of the dielectric ceramic body 10 is provided with three open road surfaces and two short circuit surfaces, the open road surfaces and the short circuit surfaces on the front surface of the dielectric ceramic body 10 are arranged in a staggered manner, so that the conductive layer 20 can be matched with the dielectric ceramic body 10 to form resonance frequency and coupling bandwidth, and the open road surfaces and the short circuit surfaces can form an interdigital effect.
The advantages of this arrangement are that: the coupling bandwidth can be formed by utilizing the matching of the open pavement and the short pavement at the two ends of the resonant hole, the coupling bandwidth can be further improved by utilizing the interdigital effect formed by the intersection of the open pavement and the short pavement, and the coupling bandwidth is simple in structure, high in adjustment degree and wider in bandwidth, and compared with the prior art, the bandwidth can be improved to more than 250MHz from about 100 MHz.
In this embodiment, the short circuit surface is a conductive layer 30 extending along the vertical direction and electrically connected to the conductive layers 20 on the upper surface and the lower surface of the dielectric ceramic body 10, the open circuit surface is provided with a conductive ring 40 surrounding the hole portion, the conductive ring 40 includes a circular ring and a rectangular ring, and the conductive ring 40 is electrically connected to the conductive layer 20 on the inner wall of the resonant hole 11.
Further, the dielectric ceramic filter further comprises an input/output electrode 50, the input/output electrode 50 is electrically connected with the conductive rings 40 at two ends of the front surface of the dielectric ceramic body 10 so as to facilitate the extraction, specifically, the input/output electrode 50 is disposed on the lower surface of the dielectric ceramic body 10 and isolated from the ground plane by an L-shaped isolation groove 60, the L-shaped isolation groove 60 exposes out of the dielectric ceramic body 10, so that the installation and application of the dielectric ceramic filter can be facilitated, and the conductive rings 40 at two ends of the front surface of the dielectric ceramic body 10 are electrically connected with the input/output electrode 50 by conductive wires.
In this embodiment, the conductive layer 30, the conductive ring 40, and the conductive layer 20 (including the conductive layer 20 disposed on the inner wall of the resonant hole 11) are all silver layers formed by curing conductive silver paste.
In order to facilitate adjustment of the coupling bandwidth, in this embodiment, the axes of all the resonant holes 11 are located on the same plane, the distances between the axes of all the resonant holes 11 and the upper surface and the lower surface of the dielectric ceramic body 10 are equal, and the apertures of all the resonant holes 11 are equal.
When adjusting the coupling bandwidth, the coarse tuning is divided into coarse tuning and fine tuning, wherein the coarse tuning refers to adjusting the resonant frequency and the coupling bandwidth at the same time, and the main mode of the coarse tuning is to change the thickness of the dielectric ceramic body 10 in the up-down direction, specifically, the thickness of the dielectric ceramic body 10 in the up-down direction is positively correlated with the coupling bandwidth.
The main mode of fine tuning is to change the interval between the center lines of the resonance holes 11 corresponding to the adjacent open road surface and the short road surface, specifically, the interval between the center lines of the resonance holes 11 corresponding to the open road surface and the short road surface on the front surface of the dielectric ceramic body 10 is inversely related to the coupling bandwidth; in actual adjustment, if there is only one resonant hole 11 corresponding to the open road surface and/or the short circuit surface, the center line is the axis line of the resonant hole 11; if there are two or more resonant holes 11 corresponding to the open-circuit surface and/or the short-circuit surface, the center line is the axis line of the equivalent holes (equivalent in electrical performance) of all the resonant holes 11 corresponding to the open-circuit surface and/or the short-circuit surface.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. The dielectric ceramic filter with the penetrating resonant holes and wider bandwidth comprises a dielectric ceramic body and a conductive layer, wherein the dielectric ceramic body is a cuboid extending along the left-right direction, midpoints of four long sides of the dielectric ceramic body are connected into a virtual plane, and the conductive layer is laid on the upper surface, the lower surface, the left surface and the right surface of the dielectric ceramic body to form a grounding surface;
the method is characterized in that:
the dielectric ceramic body is provided with resonance holes, the resonance holes penetrate through the dielectric ceramic body and the conductive layer along the front-back direction, a plurality of resonance holes are symmetrically distributed along the virtual plane, and the conductive layer is laid on the inner wall of the resonance holes; the resonance hole is characterized in that an opening surface is arranged at the opening part at one end of the resonance hole, a short circuit surface is arranged at the opening part at the other end of the resonance hole, at least two opening surfaces and at least one short circuit surface are arranged on the front surface of the dielectric ceramic body, and the opening surfaces and the short circuit surfaces are arranged in a staggered manner, so that an interdigital effect can be formed between the opening surfaces and the short circuit surfaces.
2. The dielectric ceramic filter with a through resonant hole and a wider bandwidth according to claim 1, wherein: the short road surface is a conducting layer which extends along the up-down direction and is electrically connected with the conducting layers positioned on the upper surface and the lower surface of the dielectric ceramic body, the open circuit surface is provided with a conducting ring surrounding the hole part, the conducting ring comprises a circular ring and a rectangular ring, and the conducting ring is electrically connected with the conducting layer on the inner wall of the resonant hole.
3. The dielectric ceramic filter with a through resonant hole and a wider bandwidth according to claim 2, wherein: the dielectric ceramic filter further comprises input and output electrodes, and the input and output electrodes are electrically connected with the conducting rings at two ends of the front surface of the dielectric ceramic body.
4. A dielectric ceramic filter having a through resonant hole and a wider bandwidth as claimed in claim 3, wherein: the input/output electrode is arranged on the lower surface of the dielectric ceramic body and is isolated from the ground plane through an L-shaped isolation groove, and the L-shaped isolation groove exposes out of the dielectric ceramic body.
5. The dielectric ceramic filter with a through resonant hole and a wider bandwidth according to claim 2, wherein: the conducting layer, the conducting ring and the conducting layer are silver layers or copper layers.
6. The dielectric ceramic filter with a through resonant hole and a wider bandwidth according to claim 1, wherein: and the axial leads of all the resonant holes are positioned on the same plane.
7. The dielectric ceramic filter with a through resonant hole and a wider bandwidth according to claim 6, wherein: the distance between the center lines of the resonance holes corresponding to the open road surface and the short road surface on the front surface of the dielectric ceramic body is inversely related to the coupling bandwidth; when the open road surface and/or the short road surface correspond to the resonance holes, the central line is the axial lead of the resonance hole, and when the open road surface and/or the short road surface correspond to the resonance holes, the central line is the axial lead of the equivalent holes of all the resonance holes corresponding to the open road surface and/or the short road surface.
8. The dielectric ceramic filter with a through resonant hole and a wider bandwidth according to claim 6, wherein: the distance between the axis of the resonant hole and the upper surface and the lower surface of the dielectric ceramic body is equal.
9. The dielectric ceramic filter with a through resonant hole and a wider bandwidth according to claim 1, wherein: the thickness of the dielectric ceramic body in the up-down direction is positively correlated with the coupling bandwidth.
10. The dielectric ceramic filter with a through resonant hole and a wider bandwidth according to claim 1, wherein: and the pore diameters of all the resonant holes are equal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311214237.5A CN117239371A (en) | 2023-07-21 | 2023-07-21 | Method for adjusting coupling bandwidth of dielectric ceramic filter |
| CN202310897054.1A CN116632475B (en) | 2023-07-21 | 2023-07-21 | Dielectric ceramic filter with penetrating resonant holes and wider bandwidth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310897054.1A CN116632475B (en) | 2023-07-21 | 2023-07-21 | Dielectric ceramic filter with penetrating resonant holes and wider bandwidth |
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| CN202311214237.5A Division CN117239371A (en) | 2023-07-21 | 2023-07-21 | Method for adjusting coupling bandwidth of dielectric ceramic filter |
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| CN116632475A CN116632475A (en) | 2023-08-22 |
| CN116632475B true CN116632475B (en) | 2023-10-17 |
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| CN202311214237.5A Pending CN117239371A (en) | 2023-07-21 | 2023-07-21 | Method for adjusting coupling bandwidth of dielectric ceramic filter |
| CN202310897054.1A Active CN116632475B (en) | 2023-07-21 | 2023-07-21 | Dielectric ceramic filter with penetrating resonant holes and wider bandwidth |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117239371A (en) * | 2023-07-21 | 2023-12-15 | 江苏灿勤科技股份有限公司 | Method for adjusting coupling bandwidth of dielectric ceramic filter |
| CN117200728B (en) * | 2023-11-07 | 2024-02-02 | 江苏灿勤科技股份有限公司 | Split type band elimination filter with good in-band inhibition effect |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000039984A (en) * | 1998-12-16 | 2000-07-05 | 고순청 | Dielectric ceramic resonator |
| JP2002110455A (en) * | 2000-09-29 | 2002-04-12 | Koa Corp | Ceramic chip dielectric filter and its manufacturing method |
| CN110828947A (en) * | 2019-11-15 | 2020-02-21 | 中国电子科技集团公司第二十六研究所 | Cross-coupling dielectric waveguide filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05175703A (en) * | 1991-12-25 | 1993-07-13 | Fuji Elelctrochem Co Ltd | Dielectric filter |
| JPH09219605A (en) * | 1996-02-09 | 1997-08-19 | Ngk Spark Plug Co Ltd | Dielectric filter and resonance frequency adjusting method therefor |
| KR20040007077A (en) * | 2002-07-16 | 2004-01-24 | 성규제 | Mono block dielectric filter |
| CN109075422B (en) * | 2016-04-26 | 2020-02-21 | 华为技术有限公司 | Dielectric resonator, dielectric filter using same, transceiver and base station |
| CN117239371A (en) * | 2023-07-21 | 2023-12-15 | 江苏灿勤科技股份有限公司 | Method for adjusting coupling bandwidth of dielectric ceramic filter |
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- 2023-07-21 CN CN202311214237.5A patent/CN117239371A/en active Pending
- 2023-07-21 CN CN202310897054.1A patent/CN116632475B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000039984A (en) * | 1998-12-16 | 2000-07-05 | 고순청 | Dielectric ceramic resonator |
| JP2002110455A (en) * | 2000-09-29 | 2002-04-12 | Koa Corp | Ceramic chip dielectric filter and its manufacturing method |
| CN110828947A (en) * | 2019-11-15 | 2020-02-21 | 中国电子科技集团公司第二十六研究所 | Cross-coupling dielectric waveguide filter |
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| Publication number | Publication date |
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| CN117239371A (en) | 2023-12-15 |
| CN116632475A (en) | 2023-08-22 |
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