CN103311619A - Ultra wide band filter - Google Patents
Ultra wide band filter Download PDFInfo
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- CN103311619A CN103311619A CN2012100678754A CN201210067875A CN103311619A CN 103311619 A CN103311619 A CN 103311619A CN 2012100678754 A CN2012100678754 A CN 2012100678754A CN 201210067875 A CN201210067875 A CN 201210067875A CN 103311619 A CN103311619 A CN 103311619A
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- 239000004020 conductor Substances 0.000 claims description 39
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- 238000004891 communication Methods 0.000 abstract description 8
- 238000003780 insertion Methods 0.000 abstract description 4
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- 230000005540 biological transmission Effects 0.000 description 4
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Abstract
The invention discloses an ultra wide band filter which is in a ridge waveguide structure and can realize ultra wide band requirements. The ultra wide band filter disclosed by the invention has the advantages of simplicity in machining, low machining cost, convenience in debugging, low insertion loss, high finished-product rate and the like. The ultra wide band filter disclosed by the invention is hopeful to be widely applied to an ultra wide band wireless communication system and is particularly suitable for military and civil fields of radars, missile guidance, electronic countermeasures, communication and the like.
Description
Technical field
Patent of the present invention relates to a kind of filter, specifically, relates to a kind of the utilization and adds the ultra-wide band filter that metal ridge consists of ridge waveguide structure in the cavity.
Background technology
So-called ultra-wide band filter makes and refers to that relative bandwidth surpasses the band pass filter more than 30%.Along with the fast development of the Technology of Ultra, the super broad band radio communication electronic equipment is had higher requirement.Filter is being played the part of important role in super broad band radio communication system, it plays the important function of selecting signal, be requisite critical elements in the super broad band radio communication system, its service behaviour quality directly has influence on the integral working of super broad band radio communication system.
Mostly traditional ultra-wide band filter be to realize with the structures such as microstrip line, the line of rabbet joint and defective ground, and this filter has the little characteristics of volume, but have also that Insertion Loss is large, Out-of-band rejection is poor, be difficult for debugging and the shortcoming such as rate of finished products is low.But patent of the present invention adopts the ridge waveguide structure implementation structure simple, and differential loss is little, the advantage of stable performance.
Summary of the invention
The object of the present invention is to provide a kind of filter with low insertion loss, processing simple, be easy to debug, ultra-wide band filter that rate of finished products is high.The relative bandwidth of the ultra-wide band filter of this paper definition can be accomplished more than 100%.
To achieve these goals, the technical solution used in the present invention is: a kind of ultra-wide band filter, comprise cavity and be arranged on two coaxial line joints on the cavity, and the cover plate that is arranged on the cavity top, and the metal ridge that is arranged on inside cavity and is connected with cavity bottom, described coaxial line joint mainly is made of coaxial outer conductor and the coaxial inner conductor that runs through coaxial outer conductor; Metal ridge is the plane parallel with cover plate away from the one side of cavity bottom, there is the gap between the two side of metal ridge and cavity, described coaxial inner conductor stretches in the cavity and with metal ridge and contacts, and described coaxial inner conductor is connected an end with metal ridge end face central point is higher than metal ridge away from the one side of cavity bottom.
The described coaxial inner conductor that stretches in the cavity directly is placed on metal ridge away from contacting on the one side of cavity bottom and with it.
Described metal ridge has sulculus in the side near cavity wall, sulculus is positioned at the top of this side, described coaxial inner conductor is arranged in the sulculus, and described coaxial inner conductor is connected an end with metal ridge end face central point is higher than metal ridge away from the one side of cavity bottom.
On the cover plate above the cavity and be positioned at the coaxial inner conductor that stretches into cavity directly over be provided with Baltimore groove, the notch opening direction of described Baltimore groove is for pointing to cavity bottom, the flute length of its Baltimore groove stretches into length in the cavity greater than coaxial inner conductor.
The shape of cross section of described cavity and metal ridge is rectangle.
The cross section of described Baltimore groove be rectangle and with metal ridge away from least two vertical crest line roundings of the one side of cavity bottom.
The cross section of described Baltimore groove is a circular part.
On the cover plate directly over the metal ridge in the described cavity at least one tuning screw arranged, the axial direction of described tuning screw is perpendicular to the one side of metal ridge away from empty waveguide bottom.
At least one tuning screw arranged on the cover plate directly over the described Baltimore groove, and the axial direction of described tuning screw is perpendicular to the one side of metal ridge away from cavity bottom.
Described metal ridge away from the one side of cavity bottom and the gap between the cover plate less than 1/8 of housing depth.
The present invention stretches into coaxial inner conductor in the cavity and with metal ridge and contacts, and described coaxial inner conductor is connected an end with metal ridge end face central point is higher than metal ridge away from the one side of cavity bottom.The input and output joint can better be mated under super width; Filter in the past adopts the connected mode with coaxial line joint and metal ridge middle part, and this set can only satisfy general filter function, can not reach the effect of ultra broadband filtering.Draw through experiment, the present invention is higher than metal ridge away from the one side of cavity bottom with coaxial inner conductor is connected an end with metal ridge end face central point, and such setting can realize that the input and output joint can better mate under super width; Can realize the effect of ultra broadband filtering with this.
Further, the setting of coaxial line joint can be divided into two kinds, and a kind of is directly the coaxial line joint to be placed on metal ridge away from contacting on the one side of cavity bottom and with it.Arranging like this is simple in structure, can save the processing cost, enhances productivity.Another kind of, the present invention also will have sulculus at the two ends near the cavity two side in metal ridge, sulculus is positioned at the top of this side, and coaxial inner conductor is arranged in the sulculus, and described coaxial inner conductor is connected an end with metal ridge end face central point is higher than metal ridge away from the one side of cavity bottom.
Because along with metal ridge is less away from one side and the gap between the cover plate of empty waveguide bottom, then the bandwidth of the ridge waveguide of metal ridge and empty waveguide composition is with increasing, the table one of below is 15mm for the empty duct width of rectangle, highly be 8mm, two transmission frequencies that claim the pattern that electromagnetic field distributes of the money when rectangular metal ridge width is 4.92mm under the pattern analysis of CST.Wherein represent metal ridge away from the one side of empty waveguide bottom and the gap between the cover plate with gap, f1 represents the transmission frequency of first pattern, and f2 is expressed as the transmission frequency of second pattern, and the unit of frequency is GHz, and the unit of length is mm.
Table one
Can find out along with the change of gap is large, f1 becomes large trend, and to become large trend than f2 faster, and namely the ratio of f2 and f1 is more and more less, so its relative bandwidth is also just more and more less.
At this, for the bandwidth that realizes filter surpasses 100% requirement and return loss less than the requirement of 10dB, according to experiment experience draw spy of the present invention with metal ridge away from the one side of cavity bottom and the gap between the cover plate less than 1/8 of housing depth.
Tuning in order to carry out the coaxial inner conductor position, the present invention also arranges Baltimore groove, on Baltimore groove post upper cover plate too be provided with tuning screw.
The operation principle of ultra-wide band filter:
Waveguide transmission line itself is a high pass filter, adopt the structure of ridge waveguide can make the main mould cut-off frequency of ridge waveguide lower than empty waveguide, and the cut-off frequency of first higher mode is higher than the cut-off frequency of first higher mode of empty waveguide, this just so that the bandwidth of its work widen, the upper end face that the end face central point of the coaxial inner conductor of joint is higher than metal ridge can well satisfy under the requirement of ultra broadband reflection coefficient namely so that coaxial line joint and ridge waveguide can well mate.
The invention has the advantages that, debugging is convenient, Insertion Loss is low, rate of finished products is high, the low ultra-wide band filter provided by the invention of processing cost is expected to be widely used in the super broad band radio communication system, particularly military affairs and the civil areas such as radar, missile guidance, electronic countermeasures, communication.
Description of drawings
Fig. 1 is the side sectional view of the embodiment of the invention 1.
Fig. 2 is the cutaway view of the A-A direction of Fig. 1 in the embodiment of the invention 1.
Fig. 3 is the cover plate cutaway view of the B-B direction of Fig. 2 in the embodiment of the invention 1.
Fig. 4 is the side sectional view in the embodiment of the invention 2.
Fig. 5 is the cutaway view of the C-C direction of the embodiment of the invention 2.
Label among the figure is expressed as respectively: 1, coaxial inner conductor; 2, coaxial outer conductor; 3, cavity; 4, metal ridge; 5, cover plate; 6, Baltimore groove; 7, coaxial air column; 8, tuning screw.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail, but embodiment of the present invention is not limited to this.
As shown in Figure 1, 2, 3, a kind of ultra-wide band filter, comprise cavity 3 and be arranged on two coaxial line joints on the cavity 3, and the cover plate 5 that is arranged on cavity 3 tops, and being arranged on the metal ridge 4 that cavity 3 is inner and be connected with cavity 3 bottoms, described coaxial line joint mainly is made of coaxial outer conductor 2 and the coaxial inner conductor 1 that runs through coaxial outer conductor 2; Metal ridge 4 is the plane parallel with cover plate 5 away from the one side of cavity 3 bottoms, there is the gap between the two side of metal ridge 4 and cavity 3, described coaxial inner conductor 1 stretches in the cavity 3 and with metal ridge 4 and contacts, and described coaxial inner conductor 1 is connected an end with metal ridge 4 end face central point is higher than metal ridge 4 away from the one side of cavity 3 bottoms.
The described coaxial inner conductor 1 that stretches in the cavity 3 directly is placed on metal ridge 4 away from contacting on the one side of cavity 3 bottoms and with it.
On the cover plate 5 above the cavity 3 and be positioned at the coaxial inner conductor 1 that stretches into cavity 3 directly over be provided with Baltimore groove 6, the notch opening direction of described Baltimore groove 6 is for pointing to cavity 3 bottoms, and the flute length of its Baltimore groove 6 stretches into length in the cavity 3 greater than coaxial inner conductor 1.
The shape of cross section of described cavity 3 and metal ridge 4 is rectangle.
The cross section of described Baltimore groove 6 be rectangle and with metal ridge 4 away from least two vertical crest line roundings of the one side of cavity 3 bottoms.
On the cover plate 5 directly over the described metal ridge 4 that is positioned at cavity 3 at least one tuning screw 7 arranged, the axial direction of described tuning screw 7 is perpendicular to the one side of metal ridge 4 away from empty waveguide 3 bottoms.
On the cover plate 5 directly over the described Baltimore groove 6 at least one tuning screw 7 arranged, the axial direction of described tuning screw 7 is perpendicular to the one side of metal ridge 4 away from cavity 3 bottoms.
Described metal ridge 4 away from the one side of cavity 3 bottoms and the gap between the cover plate 5 less than 1/8 of cavity 3 height.
Other implementation of the present invention is diversified, here provided the most handy the simplest a kind of structure, what the metal ridge 4 here provided is that cross section is the cylindrical metal body of rectangle, but it can be the column of the irregular shape changeable of shape bit of cross section also can be crooked.Baltimore groove 6 cuboids given here on the cover plate 5, it also can be the groove of the part of circle.
Shown in Figure 4 and 5, the difference of itself and embodiment 1 is that described metal ridge 4 has sulculus in the side near cavity 3 sidewalls, sulculus is positioned at the top of this side, coaxial inner conductor 1 is arranged in the sulculus, and coaxial inner conductor 1 is connected an end with metal ridge 4 end face central point is higher than metal ridge 4 away from the one side of cavity 3 bottoms.The sulculus at two ends, plane, top is cuboid on the metal ridge 4 given here, and it also can be a circular part.
Just can realize preferably the present invention as mentioned above.
Claims (10)
1. ultra-wide band filter, it is characterized in that: comprise cavity (3) and be arranged on two coaxial line joints on the cavity (3), and the cover plate (5) that is arranged on cavity (3) top, and being arranged on cavity (3) metal ridge (4) inner and that is connected with cavity (3) bottom, described coaxial line joint is mainly by coaxial outer conductor (2) and coaxial inner conductor (1) formation that is positioned at coaxial outer conductor (2); Metal ridge (4) is the plane parallel with cover plate (5) away from the one side of cavity (3) bottom, there is the gap between the two side of metal ridge (4) and cavity (3), described coaxial inner conductor (1) stretches in the cavity (3) and with metal ridge (4) and contacts, and described coaxial inner conductor (1) is connected an end with metal ridge (4) end face central point is higher than metal ridge (4) away from the one side of cavity (3) bottom.
2. a kind of ultra-wide band filter according to claim 1 is characterized in that, the described coaxial inner conductor (1) that stretches in the cavity (3) directly is placed on metal ridge (4) away from contacting on the one side of cavity (3) bottom and with it.
3. a kind of ultra-wide band filter according to claim 1, it is characterized in that, described metal ridge (4) has sulculus in the side near cavity (3) sidewall, sulculus is positioned at the top of this side, described coaxial inner conductor (1) is arranged in the sulculus, and described coaxial inner conductor (1) is connected an end with metal ridge (4) end face central point is higher than metal ridge (4) away from the one side of cavity (3) bottom.
4. a kind of ultra-wide band filter according to claim 1, its feature is being, at the cover plate (5) of cavity (3) top upper and be positioned at the coaxial inner conductor (1) that stretches into cavity (3) directly over be provided with Baltimore groove (6), the notch opening direction of described Baltimore groove (6) is for pointing to cavity (3) bottom, and the flute length of its Baltimore groove (6) stretches into length in the cavity (3) greater than coaxial inner conductor (1).
5. a kind of adapter according to claim 1 is characterized in that, the shape of cross section of described cavity (3) and metal ridge (4) is rectangle.
6. a kind of ultra-wide band filter according to claim 4 is characterized in that, the cross section of described Baltimore groove (6) be rectangle and with metal ridge (4) away from least two vertical crest line roundings of the one side of cavity (3) bottom.
7. a kind of ultra-wide band filter according to claim 4 is characterized in that, the cross section of described Baltimore groove (6) is a circular part.
8. a kind of ultra-wide band filter according to claim 1, it is characterized in that, being positioned on the cover plate (5) directly over the metal ridge (4) of cavity (3) has at least one tuning screw (7), and the axial direction of described tuning screw (7) is perpendicular to the one side of metal ridge (4) away from empty waveguide (3) bottom.
9. a kind of adapter according to claim 1, it is characterized in that, on the cover plate (5) directly over the described Baltimore groove (6) at least one tuning screw (7) arranged, the axial direction of described tuning screw (7) is perpendicular to the one side of metal ridge (4) away from cavity (3) bottom.
10. according to the described a kind of ultra-wide band filter of any one among the claim 1-9, it is characterized in that, described metal ridge (4) away from the one side of cavity (3) bottom and the gap between the cover plate (5) less than 1/8 of cavity (3) height.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210067875.4A CN103311619B (en) | 2012-03-15 | 2012-03-15 | A kind of ultra-wide band filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210067875.4A CN103311619B (en) | 2012-03-15 | 2012-03-15 | A kind of ultra-wide band filter |
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| CN103311619A true CN103311619A (en) | 2013-09-18 |
| CN103311619B CN103311619B (en) | 2015-09-16 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0704923A1 (en) * | 1994-09-28 | 1996-04-03 | ANT Nachrichtentechnik GmbH | Comb filter |
| CN101593872A (en) * | 2009-07-01 | 2009-12-02 | 电子科技大学 | A kind of back-fed millimeter wave broadband double ridged horn antenna |
| CN102324600A (en) * | 2011-07-25 | 2012-01-18 | 成都赛纳赛德科技有限公司 | Ultra-wideband filter |
| CN202474162U (en) * | 2012-03-15 | 2012-10-03 | 成都赛纳赛德科技有限公司 | Ultra-wideband filter |
-
2012
- 2012-03-15 CN CN201210067875.4A patent/CN103311619B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0704923A1 (en) * | 1994-09-28 | 1996-04-03 | ANT Nachrichtentechnik GmbH | Comb filter |
| CN101593872A (en) * | 2009-07-01 | 2009-12-02 | 电子科技大学 | A kind of back-fed millimeter wave broadband double ridged horn antenna |
| CN102324600A (en) * | 2011-07-25 | 2012-01-18 | 成都赛纳赛德科技有限公司 | Ultra-wideband filter |
| CN202474162U (en) * | 2012-03-15 | 2012-10-03 | 成都赛纳赛德科技有限公司 | Ultra-wideband filter |
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| CN103311619B (en) | 2015-09-16 |
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Effective date of registration: 20201126 Address after: 224000 604, building 31, Hongya Mingju, Hede Town, Sheyang County, Yancheng City, Jiangsu Province Patentee after: Liu Jingjing Address before: 610000 Shiyang Industrial Park, hi tech Zone, Chengdu, Sichuan Patentee before: CHENGDU SINOSCITE TECHNOLOGY Co.,Ltd. |
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Application publication date: 20130918 Assignee: Yancheng Yidao Translation Technology Co.,Ltd. Assignor: Liu Jingjing Contract record no.: X2023980045845 Denomination of invention: A Kind of Ultra Wideband Filter Granted publication date: 20150916 License type: Common License Record date: 20231110 |
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Application publication date: 20130918 Assignee: Yancheng Yushi Weiheng Information Technology Co.,Ltd.|SHEYANG JINHE CELLULOSE Co.,Ltd.|Yancheng Antong Fiber Co.,Ltd.|Jiangsu Nanxiang Rubber Products Co.,Ltd. Assignor: Liu Jingjing Contract record no.: X2023980050799 Denomination of invention: A type of ultra wideband filter Granted publication date: 20150916 License type: Common License Record date: 20231208 |
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Application publication date: 20130918 Assignee: Jiangsu Meicun Food Co.,Ltd.|Jiangsu Pinwu Food Co.,Ltd.|SHEYANG LIUHE FEED CO.,LTD.|Yancheng Dabei Agricultural Feed Co.,Ltd. Assignor: Liu Jingjing Contract record no.: X2023980053566 Denomination of invention: A type of ultra wideband filter Granted publication date: 20150916 License type: Common License Record date: 20231223 |