CN103545580A - Miniaturized adjustable band stop filter - Google Patents
Miniaturized adjustable band stop filter Download PDFInfo
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- CN103545580A CN103545580A CN201210241171.4A CN201210241171A CN103545580A CN 103545580 A CN103545580 A CN 103545580A CN 201210241171 A CN201210241171 A CN 201210241171A CN 103545580 A CN103545580 A CN 103545580A
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- transmission line
- resonant cavity
- inner wire
- outer conductor
- tuning screw
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Abstract
The invention discloses a miniaturized adjustable band stop filter which comprises a transmission line and multiple resonance cavities (3). A coupling component (4) is arranged on the side wall of each resonance cavity (3), the resonance cavities (3) are connected with the transmission line through the coupling components (4), a metal column (5) and a metal plate connected with the metal column (5) are arranged in each resonance cavity (3), the side wall of each resonance cavity (3) is connected with a frequency tuning screw (6) extending into the corresponding resonance cavity (3), and an end head of one end, embedded into the corresponding resonance cavity (3), of each frequency tuning screw (6) directly faces the middle of the corresponding metal plate (10). By adopting the above structure, the miniaturized adjustable band stop filter is simple in integral structure and convenient to realize, fine tuning of resonance frequency of the resonance cavities (3) can be completed by adjusting the frequency tuning screws (6) when the miniaturized adjustable band stop filter works, and convenience in operation is realized.
Description
Technical field
The present invention relates to a kind of filter, specifically a kind of Miniaturized tunable bandstop filter.
Background technology
Filter is one of high frequency assembly indispensable in mobile communication product, and its major function is for crossover frequency, by the signal of some frequencies, blocks the signal of other frequencies.Desirable filter should be passband frequency range undamped and in decay frequency range decay infinitely great, passband should be precipitous as much as possible to the transition of decay frequency range.Band stop filter is a kind of as filter, and it allows by most of frequency components, but the frequency component of some scope decays to extremely low-level filter.On the sidewall of the microwave transmission line of a sealing, increase a coupled resonator, can on the transmission curve of transmission line, some frequency produce transmission zero, thereby stop the signal of these frequencies by this transmission line, form a band stop filter.
At present the most common to band stop filter comprise the transmission line of a coaxial configuration and some resonant cavitys of arranging along this transmission line axis.In resonant cavity, be provided with metal column, the length in resonant cavity of metal column can change from filter, by regulate the length of metal column in resonant cavity can regulate the resonance frequency resonant cavity of resonant cavity and the coupling between transmission line simultaneously.Yet the degree of depth changing in metal column insertion resonant cavity can change the resonance frequency resonant cavity of resonant cavity and the coupling between transmission line simultaneously, this just makes filter fine setting become difficult.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of simple in structure, be convenient to realize, and easy to operate a kind of Miniaturized tunable bandstop filter when filter is finely tuned.
Object of the present invention is achieved through the following technical solutions: a kind of Miniaturized tunable bandstop filter, comprise transmission line and a plurality of resonant cavity, the sidewall of described a plurality of resonant cavitys is provided with coupling component, described resonant cavity is connected by coupling component and transmission line, the metallic plate that is provided with metal column in described resonant cavity and is connected with metal column, each resonant cavity sidewall is all connected with the frequency tuning screw extending in resonant cavity, and the termination of one end of described frequency tuning screw embedding resonant cavity is over against the central part of metallic plate.Wherein, frequency tuning screw is specifically over against the central part of the other end of the relative connection metal styletable of metallic plate.
Described transmission line comprises transmission line inner wire, insulating medium layer and transmission line outer conductor, and described transmission line outer conductor is set on transmission line inner wire, and described insulating medium layer is between transmission line outer conductor and transmission line inner wire.Wherein, when specifically arranging, should guarantee insulating medium layer separation transmission line inner wire and transmission line outer conductor.
The two ends of described transmission line are equipped with coaxial fitting, and the inner wire of described coaxial fitting is successively through being connected with transmission line inner wire after transmission line outer conductor, insulating medium layer.When wherein, the inner wire of coaxial fitting is through transmission line outer conductor, should guarantee that it contacts with transmission line outer conductor.
The two ends of described transmission line are all connected with metal location-plate, and the inner wire of described coaxial fitting is through metal location-plate.
In order to realize the coupling of the present invention in band connection frequency, described a plurality of resonant cavitys are positioned at the same side of transmission line, and the opposite side that described transmission line is provided with resonant cavity side is relatively connected with coupling tuning screw, and described coupling tuning screw one end embeds in transmission line outer conductor.When specifically arranging, the position that each coupling component center line is corresponding should arrange a coupling tuning screw corresponding with it.
Compared with prior art, the present invention has following beneficial effect: the present invention includes transmission line and a plurality of resonant cavity, the sidewall of a plurality of resonant cavitys is provided with coupling component, resonant cavity is connected by coupling component and transmission line, each resonant cavity sidewall is all connected with the frequency tuning screw extending in resonant cavity, the present invention adopts said structure, overall structure is simple, be convenient to realize, easily manufactured, the present invention can complete the adjusting to resonant cavity interior resonance frequency by regulating frequency tuning screw when work, and less to the coupling influence between resonant cavity and transmission line during regulating frequency tuning screw, and then be convenient to fine setting of the present invention, the metallic plate that is provided with metal column in resonant cavity of the present invention and is connected with metal column, the present invention reduces the resonance frequency of resonant cavity by metal column and metallic plate, metal column and metallic plate have solved the parasitic stopband problem of filter, metal column and metallic plate are arranged in resonant cavity, this makes the present invention reduce volume of the present invention when tuning performance strengthens, so makes the present invention be more convenient for applying.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
In accompanying drawing, the corresponding name of Reference numeral is called: 1, transmission line inner wire, 2, transmission line outer conductor, 3, resonant cavity, 4, coupling component, 5, metal column, 6, frequency tuning screw, 7, coupling tuning screw, 8, coaxial fitting, 9, metal location-plate, 10, metallic plate.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment:
As shown in Figure 1, a kind of Miniaturized tunable bandstop filter, comprises transmission line resonant cavity 3, and wherein, the quantity of resonant cavity 3 is a plurality of, and as preferably, the quantity that resonant cavity 3 is set in the present embodiment is three.The sidewall of a plurality of resonant cavitys 3 is provided with coupling component 4, and resonant cavity 3 is connected by coupling component 4 and transmission line.In a plurality of resonant cavitys 3, be provided with metal column 5 and circular metallic plate 10, one circular end surface of metallic plate 10 is connected with metal column 5, each resonant cavity 3 sidewall is all connected with the frequency tuning screw 6 extending in resonant cavity 3, the termination of one end of frequency tuning screw 6 embedding resonant cavitys 3 is over against metallic plate 10, and the termination of frequency tuning screw 6 is specially frequency tuning screw 6 over against the central part of another circular end surface of metallic plate 10 relative connection metal post 5 ends over against metallic plate 10.A plurality of resonant cavitys 3 are positioned at the same side of transmission line, and the opposite side that transmission line is provided with resonant cavity 3 sides is relatively connected with coupling tuning screw 7.
Transmission line comprises transmission line inner wire 1, insulating medium layer and transmission line outer conductor 2, transmission line outer conductor 2 is set on transmission line inner wire 1, insulating medium layer is between transmission line outer conductor 2 and transmission line inner wire 1 and separate transmission line outer conductor 2 and transmission line inner wire 1, and coupling tuning screw 7 embeds in transmission line outer conductor 2 with the link of transmission line.
The two ends of transmission line are equipped with coaxial fitting 8 and metal location-plate 9, wherein, metal location-plate 9 is fixed on transmission line outer conductor 2 by dog screw, and the inner wire of coaxial fitting 8 is successively through being connected with transmission line inner wire 1 after metal location-plate 9, transmission line outer conductor 2, insulating medium layer.
As mentioned above, can well realize the present invention.
Claims (5)
1. a Miniaturized tunable bandstop filter, comprise transmission line and a plurality of resonant cavity (3), the sidewall of described a plurality of resonant cavity (3) is provided with coupling component (4), described resonant cavity (3) is connected by coupling component (4) and transmission line, it is characterized in that: the metallic plate (10) that is provided with metal column (5) in described resonant cavity (3) and is connected with metal column (5), each resonant cavity (3) sidewall is all connected with the frequency tuning screw (6) extending in resonant cavity (3), the termination of one end of described frequency tuning screw (6) embedding resonant cavity (3) is over against the central part of metallic plate (10).
2. a kind of Miniaturized tunable bandstop filter according to claim 1, it is characterized in that: described transmission line comprises transmission line inner wire (1), insulating medium layer and transmission line outer conductor (2), it is upper that described transmission line outer conductor (2) is set in transmission line inner wire (1), and described insulating medium layer is positioned between transmission line outer conductor (2) and transmission line inner wire (1).
3. a kind of Miniaturized tunable bandstop filter according to claim 2, it is characterized in that: the two ends of described transmission line are equipped with coaxial fitting (8), the inner wire of described coaxial fitting (8) is successively through being connected with transmission line inner wire (1) after transmission line outer conductor (2), insulating medium layer.
4. a kind of Miniaturized tunable bandstop filter according to claim 3, is characterized in that: the two ends of described transmission line are all connected with metal location-plate (9), and the inner wire of described coaxial fitting (8) is through metal location-plate (9).
5. according to a kind of Miniaturized tunable bandstop filter described in claim 2～4 any one, it is characterized in that: described a plurality of resonant cavitys (3) are positioned at the same side of transmission line, the opposite side that described transmission line is provided with resonant cavity (3) side is relatively connected with coupling tuning screw (7), and described coupling tuning screw (7) one end embeds in transmission line outer conductor (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210241171.4A CN103545580A (en) | 2012-07-13 | 2012-07-13 | Miniaturized adjustable band stop filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210241171.4A CN103545580A (en) | 2012-07-13 | 2012-07-13 | Miniaturized adjustable band stop filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103545580A true CN103545580A (en) | 2014-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210241171.4A Pending CN103545580A (en) | 2012-07-13 | 2012-07-13 | Miniaturized adjustable band stop filter |
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| CN (1) | CN103545580A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329045A (en) * | 2016-08-30 | 2017-01-11 | 成都赛纳微波科技有限公司 | Cylindrical cavity ridge coupling band-stop filter |
| CN106329047A (en) * | 2016-08-30 | 2017-01-11 | 成都赛纳微波科技有限公司 | Non-insulated band-stop filter |
| CN110380170A (en) * | 2019-07-10 | 2019-10-25 | 广东通宇通讯股份有限公司 | A kind of AFU antenna and its filter |
Citations (6)
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| CN201936972U (en) * | 2011-01-24 | 2011-08-17 | 成都赛纳赛德科技有限公司 | Band elimination filter |
| CN202134639U (en) * | 2011-08-01 | 2012-02-01 | 成都赛纳赛德科技有限公司 | Adjustable band-stop filter |
| CN202178356U (en) * | 2011-09-13 | 2012-03-28 | 安徽海特微波通信有限公司 | Band-stop filter with tuning apparatus |
| KR20120061345A (en) * | 2010-12-03 | 2012-06-13 | 주식회사 이너트론 | Band sstop filter comprising coupling tuning plates |
| CN202333096U (en) * | 2011-11-17 | 2012-07-11 | 成都赛纳赛德科技有限公司 | Miniaturized band elimination filter |
| CN202662748U (en) * | 2012-07-13 | 2013-01-09 | 成都市宏山科技有限公司 | Miniaturized adjustable band elimination filter |
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2012
- 2012-07-13 CN CN201210241171.4A patent/CN103545580A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120061345A (en) * | 2010-12-03 | 2012-06-13 | 주식회사 이너트론 | Band sstop filter comprising coupling tuning plates |
| CN201936972U (en) * | 2011-01-24 | 2011-08-17 | 成都赛纳赛德科技有限公司 | Band elimination filter |
| CN202134639U (en) * | 2011-08-01 | 2012-02-01 | 成都赛纳赛德科技有限公司 | Adjustable band-stop filter |
| CN202178356U (en) * | 2011-09-13 | 2012-03-28 | 安徽海特微波通信有限公司 | Band-stop filter with tuning apparatus |
| CN202333096U (en) * | 2011-11-17 | 2012-07-11 | 成都赛纳赛德科技有限公司 | Miniaturized band elimination filter |
| CN202662748U (en) * | 2012-07-13 | 2013-01-09 | 成都市宏山科技有限公司 | Miniaturized adjustable band elimination filter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329045A (en) * | 2016-08-30 | 2017-01-11 | 成都赛纳微波科技有限公司 | Cylindrical cavity ridge coupling band-stop filter |
| CN106329047A (en) * | 2016-08-30 | 2017-01-11 | 成都赛纳微波科技有限公司 | Non-insulated band-stop filter |
| CN110380170A (en) * | 2019-07-10 | 2019-10-25 | 广东通宇通讯股份有限公司 | A kind of AFU antenna and its filter |
| CN110380170B (en) * | 2019-07-10 | 2024-08-09 | 广东通宇通讯股份有限公司 | AFU antenna and filter thereof |
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Application publication date: 20140129 |