CN109786911A - A kind of structure and its preparation process of ceramic waveguide filter - Google Patents
A kind of structure and its preparation process of ceramic waveguide filter Download PDFInfo
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- CN109786911A CN109786911A CN201910199537.8A CN201910199537A CN109786911A CN 109786911 A CN109786911 A CN 109786911A CN 201910199537 A CN201910199537 A CN 201910199537A CN 109786911 A CN109786911 A CN 109786911A
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Abstract
The present invention relates to the structures and its preparation process of a kind of ceramic waveguide filter, a coupling hole slot is offered between two frequency lumen pores of filter, interlayer is provided between the edge of the coupling hole slot side opposite with filter, the thickness of interlayer is according to coupling hole slot and frequency lumen pore stiffness of coupling.The present invention can will not damage product in firing composition, improve yield.
Description
Technical field
The present invention relates to a kind of structures of ceramic waveguide filter, also relate particularly to a kind of preparation of ceramic waveguide filter
Technique.
Background technique
With the continuous development of modern communication technology, the requirement to filter is higher and higher, small size, high-performance, Gao Gong
Rate, inexpensive wave filter technology are particularly important the filter in wireless communications application, the Array Antenna of 5G
Under application conditions, the size of existing metal cavity filter has been unable to satisfy the requirement of wireless communication system completely；As usual
20 watts of filters of single channel of rule, current size is at 200*100*30 millimeters or more, but the size of 5G filter is required in 50*
30*30 millimeters of size is hereinafter, otherwise array antenna scheme cannot achieve.
According to resonant cavity principle, the intracorporal resonance frequency of chamber, depending on the size of cavity and Jie of filling materials for wall body
Electric constant；Same packing material, the more big then resonance frequency of size are lower；Under the conditions of same size, resonance frequency and dielectric are normal
Several square roots are inversely proportional, i.e., under same cavity size, the resonance frequency of the more big then cavity of filler dielectric constant is lower, empty
Chamber resonant cavity, using air as medium, dielectric constant 1, and the available dielectric constant range of ceramic material is between 4-120, with
For 36 dielectric constants, the cavity size under same frequency condition can be reduced to 1/6th of metal cavitg, it is seen that application is situated between
Significant ability of the electric material for reduction cavity size.
Since one end of the coupling slot of filter is to open up setting, in sintering procedure, it is easy the ceramic filter
Open end damages, to cause the increase of cost.
Summary of the invention
In order to solve the above technical problems, the object of the present invention is to provide a kind of structure of ceramic waveguide filter and its
Preparation process.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of structure of ceramic waveguide filter offers a coupling hole slot, coupling between two frequency lumen pores of filter
Interlayer is provided between the edge of the conjunction hole slot side opposite with filter, the thickness of interlayer is according to coupling hole slot and frequency lumen pore
Stiffness of coupling, the formula to match are as follows:
Wherein, P is magnetic polarization coefficient；
M is the coefficient of coup；
L and D is the length and diameter for coupling hole slot respectively；
Z is the half for coupling slot length, i.e. z=L/2；
λ is constant.
A kind of preparation process of ceramic waveguide filter, comprising the following steps:
Step 1: ceramic powder is granulated；
Step 2: the ceramics of granulating and forming being placed and pass through pressure compression moulding in a mold；
Step 3: frequency lumen pore is opened up on molding ceramics, and opens up coupling slot between two frequency lumen pores,
In, the formula between the size and frequency lumen pore of coupling slot is as follows:
Step 4: by the heating rate that ceramic green after molding is per minute with 3-5 degree, within the scope of 1100-1700 degree
At a temperature of, by 8-40 hours heat preservation sinterings, waiting was cooled to ceramic block；
Step 5: the ceramic block after sinter molding is handled by grinding and polishing；
Step 6: preparing corresponding silk-screen template according to the ceramic block size in step 5；
Step 7:, will be on the surface of silver layer silk-screen to ceramic block by the screen printing method of silk-screen template；
Step 8: being burnt by the silver layer that the high temperature of 700-900 degree carries out 10 to 200min to the ceramic block after silk-screen silver layer
Knot obtains the filter with metallization.
Preferably, in the step 7, the edge coating of frequency lumen pore and coupling slot has silver layer when silk-screen template.
Preferably, gap is equipped between the corresponding side in one end and/or both ends of the coupling slot in the step 3.
According to the above aspect of the present invention, the present invention has at least the following advantages:
The present invention on ceramic filter by offering not opening coupling slot, under the premise of satisfaction meets coupling,
Make it when firing, which will not be damaged, so that it is guaranteed that the yields of ceramic sintering, reduces cost.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is structural schematic diagram of the invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction with attached in the embodiment of the present invention
Figure, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Embodiments of the present invention, which are generally described and illustrated herein in the accompanying drawings
Component can arrange and design with a variety of different configurations.Therefore, the implementation of the invention to providing in the accompanying drawings below
The detailed description of example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiment of the present invention, those skilled in the art are obtained all without making creative work
Other embodiments shall fall within the protection scope of the present invention.
Embodiment
As shown in Figure 1, a kind of structure of ceramic waveguide filter, it is characterised in that: filter two frequency lumen pores it
Between offer a coupling hole slot, couple and be provided with interlayer between the edge of hole slot and the side that filter is opposite, the thickness of interlayer
It is as follows according to coupling hole slot and frequency lumen pore stiffness of coupling, the formula to match:
Wherein, P is magnetic polarization coefficient；
M is the coefficient of coup；
L and D is the length and diameter for coupling hole slot respectively；
Z is the half for coupling slot length, i.e. z=L/2；
λ is constant.
A kind of preparation process of ceramic waveguide filter, comprising the following steps:
Step 1: ceramic powder is granulated；
Step 2: the ceramics of granulating and forming being placed and pass through pressure compression moulding in a mold；
Step 3: open up frequency lumen pore on molding ceramics, and open up between two frequency lumen pores coupling slot its
In, the formula between the size and frequency lumen pore of coupling slot is as follows:
Wherein, P is magnetic polarization coefficient；
M is the coefficient of coup；
L and D is the length and diameter of coupling slot respectively；
Z is the half for coupling slot length, i.e. z=L/2；
λ is constant；
Step 4: by the heating rate that ceramic green after molding is per minute with 3-5 degree, within the scope of 1100-1700 degree
At a temperature of, by 8-40 hours heat preservation sinterings, waiting was cooled to ceramic block；
Step 5: the ceramic block after sinter molding is handled by grinding and polishing；
Step 6: preparing corresponding silk-screen template according to the ceramic block size in step 5；
Step 7:, will be on the surface of silver layer silk-screen to ceramic block by the screen printing method of silk-screen template；
Step 8: being burnt by the silver layer that the high temperature of 700-900 degree carries out 10 to 200min to the ceramic block after silk-screen silver layer
Knot obtains the filter with metallization.
In the present invention in the step 7, the edge coating of frequency lumen pore and coupling slot has silver layer when silk-screen template.
Gap is equipped between the corresponding side in one end and/or both ends of coupling slot in heretofore described step 3.
Embodiment one
A kind of preparation process of ceramic waveguide filter, comprising the following steps:
Step 1: ceramic powder is granulated；
Step 2: the ceramics of granulating and forming being placed and pass through pressure compression moulding in a mold；
Step 3: frequency lumen pore is opened up on molding ceramics, and opens up coupling slot between two frequency lumen pores,
Step 4: by ceramic green after molding with 5 degree of heating rates per minute, at a temperature in the range of 1100 degree,
By 40 hours heat preservation sinterings, waiting was cooled to ceramic block；
Step 5: the ceramic block after sinter molding is handled by grinding and polishing；
Step 6: preparing corresponding silk-screen template according to the ceramic block size in step 5；
Step 7:, will be on the surface of silver layer silk-screen to ceramic block by the screen printing method of silk-screen template；
Step 8: being sintered, had by the silver layer that 700 degree of high temperature carry out 200min to the ceramic block after silk-screen silver layer
There is the filter of metallization.
Embodiment two
A kind of preparation process of ceramic waveguide filter, comprising the following steps:
Step 1: ceramic powder is granulated；
Step 2: the ceramics of granulating and forming being placed and pass through pressure compression moulding in a mold；
Step 3: opening up frequency lumen pore on molding ceramics, and open up coupling slot between two frequency lumen pores
Step 4: by ceramic green after molding with 3 degree of heating rates per minute, at a temperature in the range of 1700 degree,
By 10 hours heat preservation sinterings, waiting was cooled to ceramic block；
Step 5: the ceramic block after sinter molding is handled by grinding and polishing；
Step 6: preparing corresponding silk-screen template according to the ceramic block size in step 5；
Step 7:, will be on the surface of silver layer silk-screen to ceramic block by the screen printing method of silk-screen template；
Step 8: being sintered, had by the silver layer that 900 degree of high temperature carry out 10min to the ceramic block after silk-screen silver layer
The filter of metallization.
Embodiment three
A kind of preparation process of ceramic waveguide filter, comprising the following steps:
Step 1: ceramic powder is granulated；
Step 2: the ceramics of granulating and forming being placed and pass through pressure compression moulding in a mold；
Step 3: opening up frequency lumen pore on molding ceramics, and open up coupling slot between two frequency lumen pores
Step 4: by ceramic green after molding with 4 degree of heating rates per minute, at a temperature in the range of 1500 degree,
By 50 hours heat preservation sinterings, waiting was cooled to ceramic block；
Step 5: the ceramic block after sinter molding is handled by grinding and polishing；
Step 6: preparing corresponding silk-screen template according to the ceramic block size in step 5；
Step 7:, will be on the surface of silver layer silk-screen to ceramic block by the screen printing method of silk-screen template；
Step 8: being sintered, had by the silver layer that 800 degree of high temperature carry out 100min to the ceramic block after silk-screen silver layer
There is the filter of metallization.
The present invention on ceramic filter by offering not opening coupling slot, under the premise of satisfaction meets coupling,
Make it when firing, which will not be damaged, so that it is guaranteed that the yields of ceramic sintering, reduces cost.
The above is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is several improvement and
Modification, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of structure of ceramic waveguide filter, it is characterised in that: offer a coupling between two frequency lumen pores of filter
Hole slot is closed, couples and is provided with interlayer between the edge of hole slot and the side that filter is opposite, the thickness of interlayer is according to coupling hole slot
With frequency lumen pore stiffness of coupling, the formula to match is as follows:
Wherein, P is magnetic polarization coefficient；
M is the coefficient of coup；
L and D is the length and diameter for coupling hole slot respectively；
Z is the half for coupling slot length, i.e. z=L/2；
λ is constant.
2. a kind of preparation process of ceramic waveguide filter, which comprises the following steps:
Step 1: ceramic powder is granulated；
Step 2: the ceramics of granulating and forming being placed and pass through pressure compression moulding in a mold；
Step 3: opening up frequency lumen pore on molding ceramics, and open up coupling slot between two frequency lumen pores, wherein coupling
The formula closed between the size and frequency lumen pore of slot is as follows:
Step 4: the temperature by the heating rate that ceramic green after molding is per minute with 3-5 degree, within the scope of 1100-1700 degree
Under, by 8-40 hours heat preservation sinterings, waiting was cooled to ceramic block；
Step 5: the ceramic block after sinter molding is handled by grinding and polishing；
Step 6: preparing corresponding silk-screen template according to the ceramic block size in step 5；
Step 7:, will be on the surface of silver layer silk-screen to ceramic block by the screen printing method of silk-screen template；
Step 8: being sintered, obtained by the silver layer that the high temperature of 700-900 degree carries out 10 to 200min to the ceramic block after silk-screen silver layer
To the filter with metallization.
3. a kind of preparation process of ceramic waveguide filter according to claim 2, it is characterised in that: in the step 7
In, the edge coating of frequency lumen pore and coupling slot has silver layer when silk-screen template.
4. a kind of preparation process of ceramic waveguide filter according to claim 2, it is characterised in that: in the step 3
Coupling slot the corresponding side in one end and/or both ends between be equipped with gap.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615124A (en) * | 2020-12-28 | 2021-04-06 | 京信射频技术(广州)有限公司 | Dielectric waveguide filter and method for processing dielectric ceramic silver layer thereof |
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| WO2004096730A3 (en) * | 2003-04-29 | 2004-12-29 | Cts Corp | Ceramic composition and method for making the composition |
| CN107586123A (en) * | 2017-10-22 | 2018-01-16 | 桂林理工大学 | A kind of high-quality factor microwave medium ceramic material and preparation method thereof |
| CN108515601A (en) * | 2018-04-23 | 2018-09-11 | 苏州市协诚五金制品有限公司 | A kind of adjustable ceramic resonator of frequency and its preparation process |
| CN109273810A (en) * | 2018-09-11 | 2019-01-25 | 苏州市协诚五金制品有限公司 | A kind of ceramic filter structure and preparation method thereof |
-
2019
- 2019-03-15 CN CN201910199537.8A patent/CN109786911A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004096730A3 (en) * | 2003-04-29 | 2004-12-29 | Cts Corp | Ceramic composition and method for making the composition |
| CN107586123A (en) * | 2017-10-22 | 2018-01-16 | 桂林理工大学 | A kind of high-quality factor microwave medium ceramic material and preparation method thereof |
| CN108515601A (en) * | 2018-04-23 | 2018-09-11 | 苏州市协诚五金制品有限公司 | A kind of adjustable ceramic resonator of frequency and its preparation process |
| CN109273810A (en) * | 2018-09-11 | 2019-01-25 | 苏州市协诚五金制品有限公司 | A kind of ceramic filter structure and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615124A (en) * | 2020-12-28 | 2021-04-06 | 京信射频技术(广州)有限公司 | Dielectric waveguide filter and method for processing dielectric ceramic silver layer thereof |
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Application publication date: 20190521 |