CN111029697A - Double-mode ceramic dielectric filter - Google Patents
Double-mode ceramic dielectric filter Download PDFInfo
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- CN111029697A CN111029697A CN201911422026.4A CN201911422026A CN111029697A CN 111029697 A CN111029697 A CN 111029697A CN 201911422026 A CN201911422026 A CN 201911422026A CN 111029697 A CN111029697 A CN 111029697A
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- dielectric block
- frequency tuning
- dielectric
- tuning hole
- coupling
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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
- H01P1/2084—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators
- H01P1/2086—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators multimode
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Abstract
The invention provides a dual-mode ceramic dielectric filter which comprises a first dielectric block and a second dielectric block, wherein the first dielectric block and the second dielectric block are of cavity structures, a coupling diaphragm is arranged between the first dielectric block and the second dielectric block, the first dielectric block and the second dielectric block are fixedly connected, a diaphragm coupling window is arranged on the coupling diaphragm, a first coupling port is arranged at the bottom of the first dielectric block, a second coupling port is arranged at the bottom of the second dielectric block, a first frequency tuning hole is formed in the top of the first dielectric block, a second frequency tuning hole is formed in the top of the second dielectric block, a third frequency tuning hole is formed in the side surface of the first dielectric block, and a fourth frequency tuning hole is formed in the same side surface of the second dielectric block and the third frequency tuning hole of the first dielectric block. The filter component assembly device and the filter component assembly method solve the problems of large size and high production cost caused by complex assembly of filter components in the prior art.
Description
Technical Field
The invention relates to the technical field of microwave filters, in particular to a double-mode ceramic dielectric filter.
Background
Along with the continuous development of communication technology, communication base station tends to develop towards miniaturization more and more, and the wave filter is one of the important component parts of base station, also developing towards miniaturization more and more, and traditional metal cavity wave filter has the advantage such as the insertion loss is little, isolation height, but also accompanies simultaneously that the part assembly is complicated, manufacturing cost is high, shortcomings such as bulky.
Disclosure of Invention
The invention provides a double-mode ceramic dielectric filter, which aims to solve the problems of large volume and high production cost caused by complex assembly of filter parts in the prior art.
In order to solve the technical problems, the invention provides a dual-mode ceramic dielectric filter, which comprises a first dielectric block and a second dielectric block, wherein the first dielectric block and the second dielectric block are in cavity structures, a coupling diaphragm is arranged between the first dielectric block and the second dielectric block, the first dielectric block is fixedly connected with the second dielectric block, a diaphragm coupling window is arranged on the coupling diaphragm, a first coupling port is arranged at the bottom of the first dielectric block, a second coupling port is arranged at the bottom of the second dielectric block, a first frequency tuning hole is arranged at the top of the first dielectric block, a second frequency tuning hole is arranged at the top of the second dielectric block, a third frequency tuning hole is arranged at the side surface of the first dielectric block, a fourth frequency tuning hole is arranged at the same side surface of the third frequency tuning hole of the second dielectric block and the first dielectric block, a first chamfer surface is arranged between the top plane of the first dielectric block and the side surface where the third frequency tuning hole is located, the first chamfer surface is a first coupling window, a second chamfer surface is arranged between the bottom plane of the second dielectric block and the side face where the fourth frequency tuning hole is located, and the second chamfer surface is a second coupling window.
The surfaces of the first dielectric block and the second dielectric block are metalized, the used metal material is silver, and the thickness of the metal silver coating is set to be 15 um.
The shape of the diaphragm coupling window is a cross shape.
The length of the cross-shaped transverse opening of the diaphragm coupling window is 6.95mm, the width of the cross-shaped transverse opening of the diaphragm coupling window is 1mm, and the length of the longitudinal opening of the diaphragm coupling window is 7.13mm, and the width of the longitudinal opening of the diaphragm coupling window is 1.4 mm.
The invention has the following beneficial effects: compared with the prior art, the double-mode ceramic dielectric filter provided by the invention has the advantages that the four-order filter is divided into two parts by utilizing the working mode of a one-cavity double mode, the assembly difficulty is greatly reduced, the assembly precision is improved, the product yield is promoted, and the double-mode ceramic dielectric filter has the advantages of small volume, simple structure and convenience for mass production; meanwhile, the filter has the characteristics of high Q value, small insertion loss and high isolation.
Drawings
FIG. 1 is a perspective view of a double-mode ceramic dielectric filter according to an embodiment of the present invention
The first-frequency-tunable filter comprises a first dielectric block 1, a second dielectric block 2, a coupling diaphragm 3, a diaphragm coupling window 4, a first coupling port 5, a second coupling port 6, a first frequency tuning hole 7, a second frequency tuning hole 8, a third frequency tuning hole 9, a fourth frequency tuning hole 10, a first coupling window 11 and a second coupling window 12.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
Example one
As shown in fig. 1, the dual-mode ceramic dielectric filter provided by the present invention comprises a first dielectric block 1 and a second dielectric block 2, wherein the first dielectric block 1 and the second dielectric block 2 are in a cavity structure, a coupling diaphragm 3 is arranged between the first dielectric block 1 and the second dielectric block 2, the first dielectric block 1 is fixedly connected to the second dielectric block 2, a diaphragm coupling window 4 is arranged on the coupling diaphragm 3, a first coupling port 5 is arranged at the bottom of the first dielectric block 1, a second coupling port 6 is arranged at the bottom of the second dielectric block 2, a first frequency tuning hole 7 is arranged at the top of the first dielectric block 1, a second frequency tuning hole 8 is arranged at the top of the second dielectric block 2, a third frequency tuning hole 9 is arranged at the side of the first dielectric block 1, a fourth frequency tuning hole 10 is arranged at the same side of the second dielectric block 2 and the third frequency tuning hole 9 of the first dielectric block 1, a first chamfer surface is arranged between the top plane of the first dielectric block 1 and the side face where the third frequency tuning hole 9 is located, the first chamfer surface is a first coupling window 11, a second chamfer surface is arranged between the bottom plane of the second dielectric block 2 and the side face where the fourth frequency tuning hole 10 is located, and the second chamfer surface is a second coupling window 12.
Further, the surfaces of the first dielectric block 1 and the second dielectric block 2 are metalized, the used metal material is silver, and the thickness of the metal silver coating is set to be 15 um.
Further, the shape of the diaphragm coupling window 4 is a cross shape.
Further, the length of the cross-shaped transverse opening of the diaphragm coupling window 4 is 6.95mm, the width thereof is 1mm, and the length of the longitudinal opening thereof is 7.13mm, and the width thereof is 1.4 mm.
Sintering and molding the first dielectric block 1 and the second dielectric block 2, using a metal material silver to metalize the surfaces of the first dielectric block 1 and the second dielectric block 2, stripping the metal layers of the metalized first dielectric block 1 and the metalized second dielectric block 2 by using a laser machine to form a diaphragm coupling window 4, and aligning and welding the stripped first dielectric block 1 and the stripped second dielectric block 2 together.
Electromagnetic waves are input from the first coupling port 5, the electromagnetic waves in a required frequency range sequentially pass through the first dielectric block 1, the diaphragm coupling window 4 and the second dielectric block 2 and are output from the second coupling port 6, and the attenuation of the electromagnetic waves outside the required frequency range is filtered and cannot be output from the second coupling port 6.
Example two
As shown in fig. 1, the dual-mode ceramic dielectric filter provided by the present invention comprises a first dielectric block 1 and a second dielectric block 2, wherein the first dielectric block 1 and the second dielectric block 2 are in a cavity structure, a coupling diaphragm 3 is arranged between the first dielectric block 1 and the second dielectric block 2, the first dielectric block 1 is fixedly connected to the second dielectric block 2, a diaphragm coupling window 4 is arranged on the coupling diaphragm 3, a first coupling port 5 is arranged at the bottom of the first dielectric block 1, a second coupling port 6 is arranged at the bottom of the second dielectric block 2, a first frequency tuning hole 7 is arranged at the top of the first dielectric block 1, a second frequency tuning hole 8 is arranged at the top of the second dielectric block 2, a third frequency tuning hole 9 is arranged at the side of the first dielectric block 1, a fourth frequency tuning hole 10 is arranged at the same side of the second dielectric block 2 and the third frequency tuning hole 9 of the first dielectric block 1, a first chamfer surface is arranged between the top plane of the first dielectric block 1 and the side face where the third frequency tuning hole 9 is located, the first chamfer surface is a first coupling window 11, a second chamfer surface is arranged between the bottom plane of the second dielectric block 2 and the side face where the fourth frequency tuning hole 10 is located, and the second chamfer surface is a second coupling window 12.
Further, the surfaces of the first dielectric block 1 and the second dielectric block 2 are metalized, the used metal material is silver, and the thickness of the metal silver coating is set to be 15 um.
Further, the shape of the diaphragm coupling window 4 is a cross shape.
Further, the length of the cross-shaped transverse opening of the diaphragm coupling window 4 is 6.95mm, the width thereof is 1mm, and the length of the longitudinal opening thereof is 7.13mm, and the width thereof is 1.4 mm.
Sintering and molding the first dielectric block 1 and the second dielectric block 2, using a metal material silver to metalize the surfaces of the first dielectric block 1 and the second dielectric block 2, stripping the metal layers of the metalized first dielectric block 1 and the metalized second dielectric block 2 by using a laser machine to form a diaphragm coupling window 4, and aligning and welding the stripped first dielectric block 1 and the stripped second dielectric block 2 together.
Electromagnetic waves are input from the second coupling port 6, the electromagnetic waves in a required frequency range sequentially pass through the second dielectric block 2, the diaphragm coupling window 4 and the first dielectric block 1 and are output from the first coupling port 5, and the attenuation of the electromagnetic waves outside the required frequency range is filtered and cannot be output from the first coupling port 5.
In conclusion, the double-mode ceramic dielectric filter provided by the invention has the advantages that the working mode of a one-cavity double-mode is utilized, the four-order filter is divided into two parts, the assembly difficulty is greatly reduced, the assembly precision is improved, the product yield is promoted, and the double-mode ceramic dielectric filter has a small volume and a simple structure and is convenient for mass production; meanwhile, the filter has the characteristics of high Q value, small insertion loss and high isolation.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (4)
1. A double-mode ceramic dielectric filter comprises a first dielectric block (1) and a second dielectric block (2), and is characterized in that: the first dielectric block (1) and the second dielectric block (2) are of cavity structures, a coupling diaphragm (3) is arranged between the first dielectric block (1) and the second dielectric block (2), the first dielectric block (1) and the second dielectric block (2) are fixedly connected, a diaphragm coupling window (4) is arranged on the coupling diaphragm (3), a first coupling port (5) is arranged at the bottom of the first dielectric block (1), a second coupling port (6) is arranged at the bottom of the second dielectric block (2), a first frequency tuning hole (7) is arranged at the top of the first dielectric block (1), a second frequency tuning hole (8) is arranged at the top of the second dielectric block (2), a third frequency tuning hole (9) is arranged on the side surface of the first dielectric block (1), and a fourth frequency tuning hole (10) is arranged on the same side surface of the second dielectric block (2) and the third frequency tuning hole (9) of the first dielectric block (1), a first chamfer surface is arranged between the top plane of the first dielectric block (1) and the side face where the third frequency tuning hole (9) is located, the first chamfer surface is a first coupling window (11), a second chamfer surface is arranged between the bottom plane of the second dielectric block (2) and the side face where the fourth frequency tuning hole (10) is located, and the second chamfer surface is a second coupling window (12).
2. The double-mode ceramic dielectric filter as claimed in claim 1, wherein the first dielectric block (1) and the second dielectric block (2) are surface-metalized, the metal material used is silver, and the thickness of the metal silver coating is set to be 15 μm.
3. A bimodal ceramic dielectric filter as claimed in claim 1, characterized in that said iris coupling window (4) has a cross-like shape.
4. A bimodal ceramic dielectric filter as claimed in claim 3, characterized in that said cross-shaped lateral opening of said diaphragm coupling window (4) has a length of 6.95mm and a width of 1mm, and the longitudinal opening has a length of 7.13mm and a width of 1.4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422026.4A CN111029697A (en) | 2019-12-31 | 2019-12-31 | Double-mode ceramic dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422026.4A CN111029697A (en) | 2019-12-31 | 2019-12-31 | Double-mode ceramic dielectric filter |
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| Publication Number | Publication Date |
|---|---|
| CN111029697A true CN111029697A (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911422026.4A Pending CN111029697A (en) | 2019-12-31 | 2019-12-31 | Double-mode ceramic dielectric filter |
Country Status (1)
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|---|---|
| CN (1) | CN111029697A (en) |
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2019
- 2019-12-31 CN CN201911422026.4A patent/CN111029697A/en active Pending
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