CN109841935A - A kind of multi-layered ceramic waveguide filter - Google Patents
A kind of multi-layered ceramic waveguide filter Download PDFInfo
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- CN109841935A CN109841935A CN201910199469.5A CN201910199469A CN109841935A CN 109841935 A CN109841935 A CN 109841935A CN 201910199469 A CN201910199469 A CN 201910199469A CN 109841935 A CN109841935 A CN 109841935A
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Abstract
The present invention relates to a kind of multi-layered ceramic waveguide filters, including filter, it is arranged in laminated construction, the upper layer coupling window of ring type structure or hollow structure is offered on the lower end surface of the filter of upper end, lower layer's coupling window of ring type structure or hollow structure is offered on the upper surface of the filter of lower end, the ring type structure that upper layer couples the ring type structure of window and lower layer couples window is corresponding and matching is arranged, wherein, the outer layer of the two is the setting that overlaps, the internal layer of upper layer coupling window is sleeved in the internal layer of lower layer's coupling window, upper layer coupling window and lower layer's coupling window are also located between two frequency cavitys and are arranged, capacitive coupling is constituted between the dual ring structure or hollow structure and frequency cavity that equitant upper layer coupling window and lower layer's coupling window are constituted, and it generates the passband of the ceramic filter of lamination and inhibits zero point.The present invention is able to achieve the inhibition zero point of filter.
Description
Technical field
The invention belongs to the technical field of ceramic filter more particularly to a kind of multi-layered ceramic waveguide filters.
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.
It is exactly to do lamination that ceramic waveguide filter, which has a kind of smaller method, but since the interference of signal of communication is asked
Topic, it is higher to the requirement of noise of proximal end, so filter needs to generate zero point.
In view of the above shortcomings, the designer, is actively subject to research and innovation, to found a kind of new structural lamination
Ceramic waveguide filter makes it with more the utility value in industry.
Summary of the invention
In order to solve the above technical problems, the object of the present invention is to provide a kind of multi-layered ceramic waveguide filters.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of multi-layered ceramic waveguide filter, including filter are arranged, wherein the filter of upper end in laminated construction
The upper layer coupling window that ring type structure or hollow structure are offered on lower end surface, offers on the upper surface of the filter of lower end
The lower layer of ring type structure or hollow structure couples window, and upper layer couples the ring type structure of window and the ring-like knot of lower layer's coupling window
Structure is corresponding and matching is arranged, and the hollow structure that upper layer couples the hollow structure of window and lower layer couples window is corresponding and matches
Setting, wherein the outer layer of the two is the setting that overlaps, and the internal layer of upper layer coupling window is sleeved on the internal layer of lower layer's coupling window
Interior, upper layer coupling window and lower layer's coupling window are also located between two frequency cavitys and are arranged, equitant upper layer coupling window and
Capacitive coupling is constituted between the dual ring structure or hollow structure and frequency cavity that lower layer's coupling window is constituted, and makes lamination
Ceramic filter passband generate inhibit zero point.
Preferably, the upper layer coupling window and lower layer's coupling window are provided on the silver coating of filter.
Preferably, the upper layer coupling window and lower layer's coupling window are located at the centre of two frequency cavitys.
Preferably, the width of the upper layer coupling window and lower layer's coupling window is according to formula
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.
According to the above aspect of the present invention, the present invention has at least the following advantages:
The present invention couples window and lower layer's coupling window by opening up upper layer respectively on the filter of lamination, and the two is mutual
It overlaps, constitutes capacitive coupling with frequency cavity, generate the passband of the filter and inhibit zero point, effectively improve anti-interference
Property.
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 the filter construction schematic diagram of ring type structure of the invention；
Fig. 2 is the filter construction schematic diagram of hollow structure of the invention；
Fig. 3 is the structural schematic diagram of the ring type structure of laminated filter
Fig. 4 is the structural schematic diagram of the hollow structure of laminated filter.
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 Figures 1 to 4, a kind of multi-layered ceramic waveguide filter, including filter are arranged in laminated construction, wherein
The upper layer coupling window 1 of ring type structure or hollow structure, the filter in lower end are offered on the lower end surface of the filter of upper end
Upper surface on offer lower layer's coupling window 2 of ring type structure or hollow structure, upper layer couple window 1 ring type structure and under
The ring type structure of layer coupling window 2 is corresponding and matching setting, upper layer couple the hollow structure and lower layer's coupling window of window
Hollow structure is corresponding and matching is arranged, wherein the outer layer of the two is the setting that overlaps, and upper layer couples the internal layer suit of window 1
In the internal layer of lower layer's coupling window 2, upper layer coupling window 1 and lower layer's coupling window 2 are also located between two frequency cavitys and are arranged,
The dual ring structure or hollow structure and frequency cavity that equitant upper layer coupling window 1 and lower layer's coupling window 2 are constituted
Between constitute capacitive coupling, and make lamination ceramic filter passband generate inhibit zero point.
Heretofore described upper layer coupling window and lower layer's coupling window are provided on the silver coating of filter.
Heretofore described upper layer coupling window and lower layer's coupling window are located at the centre of two frequency cavitys.
The width of heretofore described upper layer coupling window and lower layer's coupling window is according to formula
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.
Prepare laminated filter, comprising the following steps:
Step 1: ceramic powder is granulated；
Step 2: the ceramics of granulating and forming being placed in a mold through pressure compression moulding, ceramic dry-pressing blank is formed；
Step 3: according to the frequency of required resonator, the size of ceramic block is defined, formula is as follows:
Wherein, fTEFor frequency；
C is the light velocity；
A is length；
D is width；
ε is dielectric constant；
Step 4: the temperature by the heating rate that green sheet after molding is per minute with 3-5 degree, within the scope of 1100-1700 degree
Under degree, 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 ceramic resonator with metallization；
Step 9: by coating silver paste coating, forming silver layer inclusion enclave；
Step 10: continuing 10-200min sintering by 400-900 degree high temperature after drying, obtain ceramic filter；
Step 11: offered on respective ceramic filter ring type structure upper layer coupling window or hollow structure it is upper
The lower layer of the lower layer's coupling window or hollow structure of layer coupling window and ring type structure couples window, and mutually isostructural filter is spelled
Dress, and the radius of upper layer coupling window and lower layer's coupling window is according to formula；
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 12: after the completion of opening up upper layer coupling window and lower layer's coupling window, two filter being passed through into silver paste and is connected
Connect fixation.
The present invention couples window and lower layer's coupling window by opening up upper layer respectively on the filter of lamination, and the two is mutual
It overlaps, constitutes capacitive coupling with frequency cavity, generate the passband of the filter and inhibit zero point, effectively improve anti-interference
Property.
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 multi-layered ceramic waveguide filter, it is characterised in that: including filter, be arranged in laminated construction, wherein upper end
The upper layer coupling window that ring type structure or hollow structure are offered on the lower end surface of filter, in the upper surface of the filter of lower end
On offer lower layer's coupling window of ring type structure or hollow structure, upper layer couples the ring type structure of window and lower layer couples window
Ring type structure it is corresponding and matching setting, upper layer couple window hollow structure and lower layer coupling window hollow structure it is opposite
It answers and matches setting, wherein the outer layer of the two is the setting that overlaps, and the internal layer of upper layer coupling window is sleeved on lower layer's coupling window
Internal layer in, upper layer coupling window and lower layer's coupling window are also located between two frequency cavitys and are arranged, equitant upper layer coupling
Capacitive coupling is constituted between the dual ring structure or hollow structure and frequency cavity that window and lower layer's coupling window are constituted, and
It generates the passband of the ceramic filter of lamination and inhibits zero point.
2. a kind of multi-layered ceramic waveguide filter according to claim 1, it is characterised in that: upper layer coupling window and
Lower layer's coupling window is provided on the silver coating of filter.
3. a kind of multi-layered ceramic waveguide filter according to claim 1, it is characterised in that: upper layer coupling window and
Lower layer's coupling window is located at the centre of two frequency cavitys.
4. a kind of multi-layered ceramic waveguide filter according to claim 1, it is characterised in that: upper layer coupling window and
Lower layer couples the width of window according to formula
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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910199469.5A CN109841935A (en) | 2019-03-15 | 2019-03-15 | A kind of multi-layered ceramic waveguide filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910199469.5A CN109841935A (en) | 2019-03-15 | 2019-03-15 | A kind of multi-layered ceramic waveguide filter |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130059679A (en) * | 2011-11-29 | 2013-06-07 | 장익수 | CERAMIC DUAL MODE RF FILTER USING THE IMAGED HEM(11δ) MADE BY A CONDUCTOR MIRROR SURFACE |
| CN105406158A (en) * | 2015-12-29 | 2016-03-16 | 华南理工大学 | Dual-mode dielectric filter enabling frequency and coupling control based metal patches |
| CN108987863A (en) * | 2018-09-18 | 2018-12-11 | 苏州市协诚五金制品有限公司 | A kind of double zero crossings coupling ceramic filters |
| CN109449557A (en) * | 2018-11-01 | 2019-03-08 | 京信通信系统（中国）有限公司 | Dielectric resonance block, dielectric waveguide filter and its coupled structure |
-
2019
- 2019-03-15 CN CN201910199469.5A patent/CN109841935A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130059679A (en) * | 2011-11-29 | 2013-06-07 | 장익수 | CERAMIC DUAL MODE RF FILTER USING THE IMAGED HEM(11δ) MADE BY A CONDUCTOR MIRROR SURFACE |
| CN105406158A (en) * | 2015-12-29 | 2016-03-16 | 华南理工大学 | Dual-mode dielectric filter enabling frequency and coupling control based metal patches |
| CN108987863A (en) * | 2018-09-18 | 2018-12-11 | 苏州市协诚五金制品有限公司 | A kind of double zero crossings coupling ceramic filters |
| CN109449557A (en) * | 2018-11-01 | 2019-03-08 | 京信通信系统（中国）有限公司 | Dielectric resonance block, dielectric waveguide filter and its coupled structure |
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Application publication date: 20190604 |