CN102593557A - Asymmetric regular mode-mixing filter - Google Patents
Asymmetric regular mode-mixing filter Download PDFInfo
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- CN102593557A CN102593557A CN2012100106539A CN201210010653A CN102593557A CN 102593557 A CN102593557 A CN 102593557A CN 2012100106539 A CN2012100106539 A CN 2012100106539A CN 201210010653 A CN201210010653 A CN 201210010653A CN 102593557 A CN102593557 A CN 102593557A
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Abstract
The invention relates to an asymmetric regular mode-mixing filter, comprising a main body and a cover plate, wherein first to fifth circular cavities are arranged on one surface of the main body and are internally and uniformly provided with harmonic oscillators; an input end and an output end are arranged on the wall of the main body and are respectively connected with the harmonic oscillators in the first circular cavity and the fifth circular cavity; the first circular cavity, the second circular cavity and the third circular cavity are arranged at a first straight line, the fifth circular cavity and the fourth circular cavity are arranged at a second straight line, the first straight line is parallel to the second straight line, the fourth circular cavity, the third circular cavity and the second circular cavity are arranged in shape of triangle, and the fifth circular cavity, the second circular cavity and the first circular cavity are arranged in shape of the triangle; and radial connection lines among the first to fifth circular cavities are provided with coupling windows. The asymmetric regular mode-mixing filter disclosed by the invention has the characteristics that the harmonic oscillators in the first, second, fourth and fifth circular cavities are metal coaxial harmonic oscillators, and the harmonic oscillator in the third circular cavity is a medium loading harmonic oscillator. The asymmetric regular mode-mixing filter disclosed by the invention has the advantages of wide use range and low manufacturing cost, and is suitable for wireless communication base station.
Description
Technical field
The present invention relates to a kind of filter.Specifically, be mixed mould cylindrical cavity filter with a plurality of asymmetric zero points, be particularly useful in the radio communication base station.
Background technology
In recent years, the microwave filter of asymmetric step function is widely used in the radio communication base station.Used harmonic oscillator or all be the coaxial harmonic oscillator of metal in this asymmetric step function microwave filter, or all be that medium loads harmonic oscillator.All adopt the coaxial harmonic oscillator of metal, make easily, low price, but Insertion Loss is bigger, and the Q value is not high.Therefore, adopt the asymmetric step function filter of the coaxial harmonic oscillator of metal, can only be used for can't being used in the system that the Q value is had relatively high expectations the less demanding system of Q value, the scope of application is restricted.The Q value of medium loading harmonic oscillator is two to three times of the coaxial harmonic oscillator of metal; In the system that may be used on the Q value is had relatively high expectations, but the high order harmonic component characteristic is poor, and price is more expensive; If all adopt medium to load harmonic oscillator, can increase the manufacturing cost of asymmetric step function filter.
Summary of the invention
The problem that the present invention will solve provides a kind of asymmetric regular mixed mode filter.This asymmetric regular mixed mode filter, the scope of application is wide, low cost of manufacture.
For addressing the above problem, take following technical scheme:
Asymmetric regular mixed mode filter of the present invention comprises body and cover plate; On the body one side adjacent first cylindrical cavity, second cylindrical cavity, the 3rd cylindrical cavity, the 4th cylindrical cavity and the 5th cylindrical cavity are arranged, in first cylindrical cavity, second cylindrical cavity, the 3rd cylindrical cavity, the 4th cylindrical cavity and the 5th cylindrical cavity harmonic oscillator is arranged all with cover plate.Input and output are arranged on the body wall, and this input and output link to each other with harmonic oscillator in the 5th cylindrical cavity with first cylindrical cavity respectively.Said first cylindrical cavity, second cylindrical cavity, the 3rd cylindrical cavity are on first straight line successively; The 5th cylindrical cavity and the 4th cylindrical cavity are on second straight line successively; The straight line parallel at the straight line at first cylindrical cavity, second cylindrical cavity and the 3rd cylindrical cavity place and the 5th cylindrical cavity and the 4th cylindrical cavity place; And be triangularly arranged between the 4th cylindrical cavity and the 3rd cylindrical cavity, second cylindrical cavity, be triangularly arranged between the 5th cylindrical cavity and second cylindrical cavity, first cylindrical cavity.On the radially line between first cylindrical cavity, second cylindrical cavity, the 3rd cylindrical cavity, the 4th cylindrical cavity and the 5th cylindrical cavity coupling window is arranged all; Make win cylindrical cavity and second cylindrical cavity radially coupling window, second cylindrical cavity and the 3rd cylindrical cavity on the line radially coupling window, the 3rd cylindrical cavity and the 4th cylindrical cavity on the line radially coupling window, the 4th cylindrical cavity and the 5th cylindrical cavity on the line radially the coupling window on the line be the adjacent coupled window, the 4th cylindrical cavity and second cylindrical cavity radially coupling window, the 5th cylindrical cavity and second cylindrical cavity on the line radially the coupling window on the line and the 5th cylindrical cavity and first cylindrical cavity radially the coupling window on the line be non-adjacent coupled window.Be characterized in first, second, the harmonic oscillator in the 4th and the 5th cylindrical cavity is the coaxial harmonic oscillator of metal; Harmonic oscillator in the 3rd cylindrical cavity is that medium loads harmonic oscillator; Coaxial harmonic oscillator of said metal and medium load harmonic oscillator and are cylindrical; And the coaxial harmonic oscillator of metal is vertical layout, and medium loads harmonic oscillator and is transverse arrangement of turbo, makes coaxial harmonic oscillator of metal and medium load the axially perpendicular of harmonic oscillator.
Wherein: the coaxial harmonic oscillator of said metal is copper post, aluminium post or stainless steel column, if adopt aluminium post or stainless steel column, side needs in aluminium post outside or stainless steel column outside plates silver layer; It is ceramic short column that said medium loads harmonic oscillator, and the longitudinal center line of ceramic short column is parallel with the radially line of second cylindrical cavity, the 4th cylindrical cavity.One end of said ceramic short column is fixed on the sidewall of the 3rd cylindrical cavity by bearing.
Said bearing is a pipe, and pipe one end links to each other with an end of ceramic short column, and the other end links to each other with the chamber wall of the 3rd cylindrical cavity.
Take such scheme, have the following advantages:
Can find out by such scheme; Because first, second, the harmonic oscillator in the 4th and the 5th cylindrical cavity is the coaxial harmonic oscillator of metal, the harmonic oscillator in the 3rd cylindrical cavity is that medium loads harmonic oscillator, through mixing mould; Make the Insertion Loss of asymmetric step function filter reduce about 40%, and eliminated high order harmonic component.Again because first, second, the harmonic oscillator in the 4th and the 5th cylindrical cavity is the coaxial harmonic oscillator of metal, the harmonic oscillator in the 3rd cylindrical cavity is that medium loads harmonic oscillator, through mixing mould, has reduced the price and the manufacturing cost of asymmetric step function filter.
Description of drawings
Fig. 1 is an asymmetric regular mixed mode filter structural representation of the present invention, for ease of seeing clearly, has omitted cover plate among the figure;
Fig. 2 is an asymmetric regular mixed mode filter schematic perspective view of the present invention.
Embodiment
As depicted in figs. 1 and 2; Asymmetric regular mixed mode filter of the present invention comprises body 10 and cover plate; Body 10 wherein is a cuboid; Be processed with first cylindrical cavity 4, second cylindrical cavity 6, the 3rd cylindrical cavity 7, the 4th cylindrical cavity 11 and the 5th cylindrical cavity 12 on body 10 one side, cover plate (not drawing among the figure) is fixed on the one side adjacent with the 5th cylindrical cavity 12 oral areas with first cylindrical cavity 4, second cylindrical cavity 6, the 3rd cylindrical cavity 7, the 4th cylindrical cavity 11.In first cylindrical cavity 4, second cylindrical cavity 6, the 3rd cylindrical cavity 7, the 4th cylindrical cavity 11 and the 5th cylindrical cavity 12 harmonic oscillator 8 is installed all.Said first cylindrical cavity 4, second cylindrical cavity 6, the 3rd cylindrical cavity 7 are on vertical first straight line of body 10 successively; The 5th cylindrical cavity 12 and the 4th cylindrical cavity 11 are on vertical second straight line of body 10 successively; Second straight line parallel that first straight line at first cylindrical cavity 4, second cylindrical cavity 6 and the 3rd cylindrical cavity 7 places and the 5th cylindrical cavity 12 and the 4th cylindrical cavity 11 belong to; And the 4th cylindrical cavity 11 and the 3rd cylindrical cavity 7,6 of second cylindrical cavities are triangularly arranged, and the 5th cylindrical cavity 12 and second cylindrical cavity 6,4 of first cylindrical cavities are triangularly arranged.All be processed with coupling window 5 on the radially line that first cylindrical cavity 4, second cylindrical cavity 6, the 3rd cylindrical cavity 7, the 4th cylindrical cavity 11 and the 5th cylindrical cavity are 12; Make win cylindrical cavity 4 and second cylindrical cavity 6 radially coupling window 5, second cylindrical cavity 6 and the 3rd cylindrical cavity 7 on the line radially coupling window 5, the 3rd cylindrical cavity 7 and the 4th cylindrical cavity 11 on the line radially coupling window 5, the 4th cylindrical cavity 11 and the 5th cylindrical cavity 12 on the line radially the coupling window 5 on the line be the adjacent coupled window, the 4th cylindrical cavity 11 and second cylindrical cavity 6 radially coupling window 5, the 5th cylindrical cavity 12 and second cylindrical cavity 6 on the line radially the coupling window 5 on the line and the 5th cylindrical cavity 12 and first cylindrical cavity 4 radially the coupling window 5 on the line be non-adjacent coupled window.Body 10 walls are provided with input 2 and output 1, and this input links to each other with the 5th cylindrical cavity 12 interior harmonic oscillators 8 with first cylindrical cavity 4 through tap 3 respectively with output.Harmonic oscillators 8 in first cylindrical cavity 4, second cylindrical cavity 6, the 4th cylindrical cavity 11 and the 5th cylindrical cavity 12 are the coaxial harmonic oscillators of metal; Harmonic oscillator 8 in the 3rd cylindrical cavity 7 is that medium loads harmonic oscillator; Coaxial harmonic oscillator of said metal and medium load harmonic oscillator and are cylindrical; And the coaxial harmonic oscillator of metal is vertical layout, and medium loads harmonic oscillator and is transverse arrangement of turbo, makes coaxial harmonic oscillator of metal and medium load the axially perpendicular of harmonic oscillator.
Wherein, the coaxial harmonic oscillator of said metal can adopt the copper post.Also can adopt the aluminium post,, then need to plate silver layer in aluminium post outside if adopt the aluminium post.Can also adopt stainless steel column, and silver coated in the outside of stainless steel column.
It is ceramic short column that said medium loads harmonic oscillator, and the longitudinal center line of ceramic short column is parallel with the radially line of second cylindrical cavity 6, the 4th cylindrical cavity 11.Wherein, an end of ceramic short column is fixed on the sidewall of the 3rd cylindrical cavity 7 by bearing 9.Said bearing 9 is pipes, and pipe one end links to each other with an end of ceramic short column, and the other end links to each other with the chamber wall of the 3rd cylindrical cavity 7.
During work,, realize electromagnetic filtering through the adjacent or non-adjacent coupled between harmonic oscillator.
Claims (7)
1. asymmetric regular mixed mode filter; Comprise body (10) and cover plate; On body (10) one side adjacent first cylindrical cavity (4), second cylindrical cavity (6), the 3rd cylindrical cavity (7), the 4th cylindrical cavity (11) and the 5th cylindrical cavity (12) are arranged, in first cylindrical cavity (4), second cylindrical cavity (6), the 3rd cylindrical cavity (7), the 4th cylindrical cavity (11) and the 5th cylindrical cavity (12) harmonic oscillator (8) is arranged all with cover plate; Input (2) and output (1) are arranged on body (10) wall, and this input links to each other with the interior harmonic oscillator (8) of the 5th cylindrical cavity (12) with first cylindrical cavity (4) respectively with output; Said first cylindrical cavity (4), second cylindrical cavity (6), the 3rd cylindrical cavity (7) are on first straight line successively; The 5th cylindrical cavity (12) and the 4th cylindrical cavity (11) are on second straight line successively; Said first straight line and second straight line parallel; And the 4th cylindrical cavity (11) and the 3rd cylindrical cavity (7), second cylindrical cavity are triangularly arranged between (6), and the 5th cylindrical cavity (12) and second cylindrical cavity (6), first cylindrical cavity are triangularly arranged between (4); On the radially line between first cylindrical cavity (4), second cylindrical cavity (6), the 3rd cylindrical cavity (7), the 4th cylindrical cavity (11) and the 5th cylindrical cavity (12) coupling window (5) is arranged all; Make the cylindrical cavity of winning (4) and second cylindrical cavity (6) radially the coupling window (5) on the line, second cylindrical cavity (6) and the 3rd cylindrical cavity (7) radially the coupling window (5) on the line, the 3rd cylindrical cavity (7) and the 4th cylindrical cavity (11) radially the coupling window (5) on the line, the 4th cylindrical cavity (11) and the 5th cylindrical cavity (12) radially the coupling window (5) on the line be the adjacent coupled window, the 4th cylindrical cavity (11) and second cylindrical cavity (6) radially the coupling window (5) on the line, the 5th cylindrical cavity (12) and second cylindrical cavity (6) radially the coupling window (5) on the line and the 5th cylindrical cavity (12) and first cylindrical cavity (4) radially the coupling window (5) on the line be non-adjacent coupled window; It is characterized in that the harmonic oscillator (8) in first cylindrical cavity (4), second cylindrical cavity (6), the 4th cylindrical cavity (11) and the 5th cylindrical cavity (12) is the coaxial harmonic oscillator of metal; Harmonic oscillator (8) in the 3rd cylindrical cavity (7) is that medium loads harmonic oscillator; Coaxial harmonic oscillator of said metal and medium load harmonic oscillator and are cylindrical; And the coaxial harmonic oscillator of metal is vertical layout, and medium loads harmonic oscillator and is transverse arrangement of turbo, makes coaxial harmonic oscillator of metal and medium load the axially perpendicular of harmonic oscillator.
2. asymmetric regular mixed mode filter according to claim 1 is characterized in that the coaxial harmonic oscillator of said metal is the copper post.
3. asymmetric regular mixed mode filter according to claim 1 is characterized in that the coaxial harmonic oscillator of said metal contains the aluminium post, and aluminium post outside is silver coated.
4. asymmetric regular mixed mode filter according to claim 1 is characterized in that the coaxial harmonic oscillator of said metal is the silver coated stainless steel column of outer surface.
5. asymmetric regular mixed mode filter according to claim 1 is characterized in that it is ceramic short column that said medium loads harmonic oscillator, and the longitudinal center line of ceramic short column is parallel with the radially line of second cylindrical cavity, the 4th cylindrical cavity.
6. asymmetric regular mixed mode filter according to claim 5 is characterized in that an end of said ceramic short column is fixed on the sidewall of the 3rd cylindrical cavity (7) by bearing (9).
7. asymmetric regular mixed mode filter according to claim 6 is characterized in that said bearing (9) is a pipe, and pipe one end links to each other with an end of ceramic short column, and the other end links to each other with the chamber wall of the 3rd cylindrical cavity (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100106539A CN102593557A (en) | 2012-01-15 | 2012-01-15 | Asymmetric regular mode-mixing filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100106539A CN102593557A (en) | 2012-01-15 | 2012-01-15 | Asymmetric regular mode-mixing filter |
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| CN102593557A true CN102593557A (en) | 2012-07-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531875A (en) * | 2013-10-24 | 2014-01-22 | 江苏贝孚德通讯科技股份有限公司 | Band-pass cavity body filter with suppression degree adjustable function |
| WO2014117486A1 (en) * | 2013-02-01 | 2014-08-07 | 华为技术有限公司 | Device for coupling metal coaxial cavity and medium resonant cavity, and filter |
Citations (6)
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| CN101185193A (en) * | 2005-05-30 | 2008-05-21 | 松下电器产业株式会社 | Microwave filter including an end-wall coupled coaxial resonator |
| JP2010098673A (en) * | 2008-10-20 | 2010-04-30 | Japan Radio Co Ltd | Dielectric filter |
| US7782158B2 (en) * | 2007-04-16 | 2010-08-24 | Andrew Llc | Passband resonator filter with predistorted quality factor Q |
| CN102013538A (en) * | 2010-10-18 | 2011-04-13 | 江苏贝孚德通讯科技股份有限公司 | Cross coupling flying rod-free microwave filter with multiple transmission zeros |
| CN102265455A (en) * | 2008-09-12 | 2011-11-30 | 天瑞通讯产品有限公司 | Coupling structures for microwave filters |
| CN202423520U (en) * | 2012-01-15 | 2012-09-05 | 江苏贝孚德通讯科技股份有限公司 | Asymmetric regular mixed-mode filter |
-
2012
- 2012-01-15 CN CN2012100106539A patent/CN102593557A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101185193A (en) * | 2005-05-30 | 2008-05-21 | 松下电器产业株式会社 | Microwave filter including an end-wall coupled coaxial resonator |
| US7782158B2 (en) * | 2007-04-16 | 2010-08-24 | Andrew Llc | Passband resonator filter with predistorted quality factor Q |
| CN102265455A (en) * | 2008-09-12 | 2011-11-30 | 天瑞通讯产品有限公司 | Coupling structures for microwave filters |
| JP2010098673A (en) * | 2008-10-20 | 2010-04-30 | Japan Radio Co Ltd | Dielectric filter |
| CN102013538A (en) * | 2010-10-18 | 2011-04-13 | 江苏贝孚德通讯科技股份有限公司 | Cross coupling flying rod-free microwave filter with multiple transmission zeros |
| CN202423520U (en) * | 2012-01-15 | 2012-09-05 | 江苏贝孚德通讯科技股份有限公司 | Asymmetric regular mixed-mode filter |
Non-Patent Citations (1)
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| JI-FUH LIANG等: "High-Q TE01 mode DR filters for PCS wireless base stations", 《1998 IEEE MTT-S DIGEST》, 31 December 1998 (1998-12-31), pages 825 - 828 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014117486A1 (en) * | 2013-02-01 | 2014-08-07 | 华为技术有限公司 | Device for coupling metal coaxial cavity and medium resonant cavity, and filter |
| CN103531875A (en) * | 2013-10-24 | 2014-01-22 | 江苏贝孚德通讯科技股份有限公司 | Band-pass cavity body filter with suppression degree adjustable function |
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Application publication date: 20120718 |