CN110828948A - Dielectric waveguide filter - Google Patents
Dielectric waveguide filter Download PDFInfo
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- CN110828948A CN110828948A CN201911348450.9A CN201911348450A CN110828948A CN 110828948 A CN110828948 A CN 110828948A CN 201911348450 A CN201911348450 A CN 201911348450A CN 110828948 A CN110828948 A CN 110828948A
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- 239000002184 metal Substances 0.000 claims abstract description 24
- 238000002955 isolation Methods 0.000 claims abstract description 5
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims 1
- 239000000919 ceramic Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010923 batch production Methods 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000006880 cross-coupling reaction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000926 separation method 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 provides a dielectric waveguide filter, which comprises a ceramic dielectric body, wherein the dielectric body is in a plate shape, one side plate surface of the dielectric body is provided with concave blind holes, strip-shaped through holes penetrating through a plate body are arranged among the blind holes, the surface of the dielectric body, the blind holes and the hole walls of the strip-shaped through holes are covered with metal thin layers, the surface where the blind holes are located or the back surface of the dielectric body are provided with signal input and output terminal holes, the hole walls of the signal input and output terminal holes are covered with the metal thin layers, and an annular isolation region is arranged between the hole ends of the signal input and output terminal holes and the metal thin layers on the dielectric body. In the technical scheme, the ceramic is used as the dielectric body, and the waveguide structure formed by coating the metal thin layer on the surface can greatly reduce the volume of the waveguide structure, so that the waveguide structure is lower in manufacturing cost and more suitable for batch production compared with the traditional waveguide structure.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a waveguide filter.
Background
The waveguide is a traditional microwave transmission line and is characterized in that a metal pipe with a fixed size section, such as a square pipe with a fixed length and width section and a circular pipe with a fixed diameter is adopted as a pipe cavity. A waveguide filter is a microwave device having a filter function by providing a resonator on a waveguide transmission line. The filter can be simply expressed as a basic structure of a metal tube wrapped with air, and has the advantages of small insertion loss and high power tolerance, and the filter also has the defects of large volume and high manufacturing cost.
Disclosure of Invention
The invention aims to provide a waveguide filter with a built-in ceramic dielectric and an outer cladding metal layer, which effectively reduces the volume of an original piece.
In order to achieve the purpose, the invention adopts the following technical scheme: a dielectric waveguide filter comprises a ceramic dielectric body, wherein the dielectric body is in a plate shape, concave blind holes are formed in one side plate surface of the dielectric body, strip-shaped through holes penetrating through a plate body are arranged among the blind holes, metal thin layers are covered on the surface of the dielectric body, the blind holes and the wall of each strip-shaped through hole, signal input and output terminal holes are formed in the surface or the back surface of each blind hole, the wall of each signal input and output terminal hole is covered with the metal thin layer, and an annular isolation region is formed between the hole end of each signal input and output terminal hole and the metal thin layer on the dielectric body.
In the technical scheme, the ceramic is used as the dielectric body, and the waveguide structure formed by coating the metal thin layer on the surface can greatly reduce the volume of the waveguide structure, so that the waveguide structure is lower in manufacturing cost and more suitable for batch production compared with the traditional waveguide structure.
Drawings
FIG. 1 is a schematic perspective view of embodiment 1 of the present invention;
FIG. 2 is a schematic perspective view of the structure shown in FIG. 1 in a back direction;
FIG. 3 is a front view of the present invention;
FIGS. 4 and 5 are cross-sectional views A-A, B-B, respectively, of FIG. 3;
FIGS. 6 and 7 are schematic perspective views of front and back sides of example 2 of the present invention;
fig. 8 and 9 are waveform diagrams in the hole and groove separation structure, respectively.
Detailed Description
Fig. 1, 2, 3, 4, and 5 show the basic structure of the present invention, that is, a dielectric waveguide filter, which includes a ceramic dielectric body 10, the dielectric body 10 is in a plate shape, one side of the dielectric body 10 is provided with recessed blind holes 20, strip-shaped through holes 30 penetrating the plate body are spaced between the blind holes 20, thin metal layers 40 are covered on the surface of the dielectric body 10, the blind holes 20, and the walls of the strip-shaped through holes 30, signal input and output terminal holes 51 and 52 are provided on the surface of the blind holes 20 or the back surface thereof, the thin metal layers 40 are covered on the walls of the signal input and output terminal holes 51 and 52, and annular isolation regions 511 and 521 are provided between the hole ends of the signal input and output terminal holes 51 and 52 and the thin metal layers 40 on the dielectric body 10.
In the above solution, ceramic is used as the dielectric body, the surface of the dielectric body is coated with metal to form an electrical wall, it should be noted that the thin metal layers 40 in the hole walls of the signal input and output terminal holes 51, 52 and the thin metal layers 40 on the dielectric body 10 are separated from each other, that is, the hole end faces of the signal input and output terminal holes 51, 52 have annular regions without the thin metal layers 40, that is, the annular regions may be directly exposed from the dielectric body. The blind hole 20 serves to adjust the frequency.
The strip-shaped through hole 30 is arranged to form relatively independent waveguide cavities in the above scheme, and the required coupling strength between the waveguide cavities is obtained in view of the setting of the shape and the position of the strip-shaped through hole 30, so as to meet the set requirements of the filter.
More preferably, a groove 60 is formed in one side plate surface of the medium body 10, the groove length direction of the groove 60 and the length direction of the strip-shaped through hole 30 are arranged in a crossed manner, a groove cavity of the groove 60 is communicated with a cavity of the strip-shaped through hole 30, the thin metal layer 40 extends to the groove wall of the groove 60, and the groove 60 and the blind hole 20 are formed in the same side plate surface of the medium body 10.
The groove length direction of the groove 60 is integrally and vertically arranged with the length direction of the strip-shaped through hole 30.
By combining the groove 60 and the strip-shaped through hole 30, the coupling strength between the waveguide cavity and the waveguide cavity can be changed, and meanwhile, cross coupling between non-adjacent cavities can be formed, so that a filter is manufactured.
For a reliable and efficient adjustment of the frequency, a plurality of blind holes 20 are provided and the strip-shaped through holes 30 and the grooves 60 are arranged reasonably, preferably as follows, see fig. 6-7:
the whole medium body 10 is in a square thin block shape, at least two rows of blind holes 20 are arranged on the medium body 10, and at least two blind holes 20 are arranged in each row. The above solution is to arrange a blind hole 20 corresponding to each resonant cavity or resonator to realize the adjustment of the resonant frequency.
The length direction of the strip-shaped through holes 30 is vertical to the connecting line direction of the blind holes 20 arranged in the same row.
The groove 60 is positioned at the interval area of the blind holes 20 in two adjacent rows, and the groove length direction is consistent with the length direction of the interval area.
For a reliable and efficient adjustment of the frequency, a plurality of blind holes 20 are provided and the strip-shaped through holes 30 and the grooves 60 are arranged reasonably, preferably as follows, see fig. 6-7:
the strip-shaped through holes 30 are arranged in two or more than two and the hole length directions of the strip-shaped through holes 30 are consistent or perpendicular to each other.
As shown in fig. 3, 6 and 7, it is preferable that the strip-shaped through holes 30 are arranged perpendicularly and crosswise to form a cross-shaped through hole, and the groove 60 is aligned with one of the strip-shaped through holes and is communicated with the end of the strip-shaped through hole.
Referring to the drawings, the signal input and output terminal holes 51 and 52 are used for inputting and outputting signals, the annular isolation regions 511 and 521 are used for isolating input and output interfaces and the metal thin layer 40 on the surface, and the filter formed by the combination of the strip-shaped through hole 30 and the groove 60 in the invention can be used for forming cross coupling.
When the slot and the slit are used separately, that is, the strip-shaped through hole 30 and the groove 60 are not communicated with each other, only the function of adjusting the coupling size is achieved, and a typical filter curve is shown in fig. 8;
the strip-shaped via 30 and the groove 60, when used in communication with each other, may function to form cross-coupling, and a typical filter curve is shown in fig. 9.
Claims (9)
1. A dielectric waveguide filter comprising a dielectric body (10) of ceramic material, characterized in that: the medium body (10) is in a plate shape, an inwards concave blind hole (20) is arranged on one side plate surface of the medium body, a strip-shaped through hole (30) penetrating through a plate body is arranged among the blind holes (20) at intervals, a metal thin layer (40) is covered on the surface of the medium body (10), the blind hole (20) and the wall of the strip-shaped through hole (30), signal input and output terminal holes (51 and 52) are arranged on the surface or the back surface of the medium body (10), the metal thin layer (40) is covered on the wall of the signal input and output terminal holes (51 and 52), and annular isolation regions (511 and 521) are arranged between the hole ends of the signal input and output terminal holes (51 and 52) and the metal thin layer (40) on the medium body (10).
2. A dielectric waveguide filter according to claim 1, wherein: a groove (60) is formed in the plate surface on one side of the medium body (10), the groove length direction of the groove (60) and the length direction of the strip-shaped through hole (30) are arranged in a crossed mode, a groove cavity of the groove (60) is communicated with a cavity of the strip-shaped through hole (30), the thin metal layer (40) extends to the groove wall of the groove (60), and the groove (60) and the blind hole (20) are formed in the plate surface on the same side of the medium body (10).
3. A dielectric waveguide filter according to claim 2, wherein: the groove length direction of the groove (60) and the length direction of the strip-shaped through hole (30) are integrally and vertically arranged.
4. A dielectric waveguide filter according to claim 1, wherein: the medium body (10) is integrally in a square thin block shape, at least two rows of blind holes (20) are formed in the medium body (10), and at least two blind holes (20) are arranged in each row.
5. A dielectric waveguide filter according to claim 1, wherein: the strip-shaped through holes (30) are vertically and crosswise arranged to form a cross-shaped through hole, the groove (60) is consistent with one strip-shaped through hole in direction, and the end parts of the groove and the strip-shaped through hole are communicated.
6. A dielectric waveguide filter according to claim 4 or 5, wherein: grooves (60) are connected to the two ends of the strip-shaped through holes (30) which are arranged in parallel with the row of the blind holes (20).
7. A dielectric waveguide filter according to claim 4, wherein: the length direction of the strip-shaped through holes (30) is vertical to the connecting line direction of the blind holes (20) arranged in the same row.
8. A dielectric waveguide filter according to claim 7, wherein: the grooves (60) are positioned at the spacing areas of the blind holes (20) in two adjacent rows, and the groove length direction is consistent with the length direction of the spacing areas.
9. A dielectric waveguide filter according to claim 7, wherein: the strip-shaped through holes (30) are at least two and the hole length directions of the strip-shaped through holes (30) are consistent or vertical to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911348450.9A CN110828948A (en) | 2019-12-24 | 2019-12-24 | Dielectric waveguide filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911348450.9A CN110828948A (en) | 2019-12-24 | 2019-12-24 | Dielectric waveguide filter |
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| Publication Number | Publication Date |
|---|---|
| CN110828948A true CN110828948A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911348450.9A Pending CN110828948A (en) | 2019-12-24 | 2019-12-24 | Dielectric waveguide filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112768856A (en) * | 2020-12-03 | 2021-05-07 | 宜宾红星电子有限公司 | Dielectric waveguide filter |
| WO2021188483A1 (en) * | 2020-03-18 | 2021-09-23 | Cts Corporation | Rf dielectric waveguide filter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209312975U (en) * | 2019-01-29 | 2019-08-27 | 苏州艾福电子通讯有限公司 | A kind of microwave filter |
| CN110265754A (en) * | 2019-07-16 | 2019-09-20 | 深圳市国人射频通信有限公司 | A kind of dielectric waveguide filter |
| CN110459840A (en) * | 2019-06-06 | 2019-11-15 | 深圳市大富科技股份有限公司 | Communication equipment, dielectric filter, medium block |
| CN210778908U (en) * | 2019-12-24 | 2020-06-16 | 合肥云之微电子有限公司 | Dielectric waveguide filter |
-
2019
- 2019-12-24 CN CN201911348450.9A patent/CN110828948A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209312975U (en) * | 2019-01-29 | 2019-08-27 | 苏州艾福电子通讯有限公司 | A kind of microwave filter |
| CN110459840A (en) * | 2019-06-06 | 2019-11-15 | 深圳市大富科技股份有限公司 | Communication equipment, dielectric filter, medium block |
| CN110265754A (en) * | 2019-07-16 | 2019-09-20 | 深圳市国人射频通信有限公司 | A kind of dielectric waveguide filter |
| CN210778908U (en) * | 2019-12-24 | 2020-06-16 | 合肥云之微电子有限公司 | Dielectric waveguide filter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021188483A1 (en) * | 2020-03-18 | 2021-09-23 | Cts Corporation | Rf dielectric waveguide filter |
| US11509029B2 (en) | 2020-03-18 | 2022-11-22 | Cts Corporation | RF dielectric waveguide filter |
| CN115552721A (en) * | 2020-03-18 | 2022-12-30 | Cts公司 | RF dielectric waveguide filter |
| CN115552721B (en) * | 2020-03-18 | 2024-03-26 | Cts公司 | RF dielectric waveguide filter |
| CN112768856A (en) * | 2020-12-03 | 2021-05-07 | 宜宾红星电子有限公司 | Dielectric waveguide filter |
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