CN202633483U - Adjustable band-rejection filter - Google Patents
Adjustable band-rejection filter Download PDFInfo
- Publication number
- CN202633483U CN202633483U CN 201220337709 CN201220337709U CN202633483U CN 202633483 U CN202633483 U CN 202633483U CN 201220337709 CN201220337709 CN 201220337709 CN 201220337709 U CN201220337709 U CN 201220337709U CN 202633483 U CN202633483 U CN 202633483U
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- China
- Prior art keywords
- transmission line
- resonant cavity
- outer conductor
- inner wire
- resonant
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Abstract
The utility model discloses an adjustable band-rejection filter. The adjustable band-rejection filter comprises a transmission line and a plurality of resonant cavities (3), wherein coupling elements (4) are arranged on the side walls of the plurality of resonant cavities (3); the resonant cavities (3) are communicated with the transmission line through the coupling elements (4); capacitive metal bodies (10) are arranged in the transmission line; a metal body (5) is arranged in each of the plurality of resonant cavities (3); and the side wall of each resonant cavity (3) is connected with a frequency tuning screw (6) extending into the resonant cavity (3). The adjustable band-rejection filter adopting the above structure has a simple integral structure, is convenient to implement, can achieve resonant frequency fine-tuning of the resonant cavities (3) only through adjusting the frequency tuning screws (6) when in operation, and is convenient to operate.
Description
Technical field
The utility model relates to a kind of filter, specifically is tunable band-stop filter.
Background technology
Filter is one of high frequency assembly indispensable in the mobile communication product, and its major function is to be used for crossover frequency, promptly blocks the signal of other frequencies through the signal of some frequencies.Desirable filter should be the passband frequency range undamped and in the 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 through 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 the signal that stops these frequencies promptly constitutes a band stop filter through this transmission line.
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.Be provided with metal column in the resonant cavity, the length in resonant cavity of metal column can change outside filter, can regulate the resonance frequency resonant cavity of resonant cavity and the coupling between the transmission line simultaneously through regulating the length of metal column in resonant cavity.Yet the degree of depth that changes in the metal column insertion resonant cavity can change the resonance frequency resonant cavity of resonant cavity and the coupling between the transmission line simultaneously, and this just makes the filter fine setting become difficult.
The utility model content
The purpose of the utility model is to overcome the deficiency of prior art, provides a kind of simple in structure, be convenient to realize, and easy to operate tunable band-stop filter when filter finely tuned.
The purpose of the utility model mainly realizes through following technical scheme: tunable band-stop filter; Comprise transmission line and a plurality of resonant cavity; The sidewall of said a plurality of resonant cavitys is provided with coupling component, and said resonant cavity is connected through coupling component and transmission line, is provided with the capacitive character metallic object in the said transmission line; Be provided with metallic object in said a plurality of resonant cavity, and each resonant cavity sidewall all is connected with the frequency tuning screw that extends in the resonant cavity.
Said transmission line comprises transmission line inner wire, insulating medium layer and transmission line outer conductor; Said transmission line outer conductor is set on the transmission line inner wire; Said insulating medium layer is between transmission line outer conductor and transmission line inner wire, and said capacitive character metallic object is arranged in the insulating medium layer and with the transmission line outer conductor and is connected.Wherein, When specifically being provided with, should guarantee insulating medium layer separation transmission line inner wire and transmission line outer conductor; It was identical with transmission line inner wire or transmission line outer conductor connection role when the capacitive character metallic object was arranged in the transmission line, preferably the capacitive character metallic object was connected on the transmission line outer conductor in the utility model.
The two ends of said transmission line are equipped with coaxial fitting, and the inner wire of said coaxial fitting is connected with the transmission line inner wire after passing transmission line outer conductor, insulating medium layer successively.Should guarantee when wherein, the inner wire of coaxial fitting passes the transmission line outer conductor that it contacts with the transmission line outer conductor.
The two ends of said transmission line all are connected with the metal location-plate, and the inner wire of said coaxial fitting passes the metal location-plate.
In order to realize the coupling of the utility model in band connection frequency; Said a plurality of resonant cavity is positioned at the same side of transmission line; The opposite side that said transmission line is provided with the resonant cavity side relatively is connected with the coupling tuning screw, and said coupling tuning screw one end embeds in the transmission line outer conductor.When specifically being provided with, the position that each coupling component center line is corresponding should be provided with a coupling tuning screw corresponding with it.
Compared with prior art, the utlity model has following beneficial effect: the utility model comprises transmission line and a plurality of resonant cavity, wherein; The sidewall of resonant cavity is provided with coupling component, and resonant cavity is connected through coupling component and transmission line, is provided with metallic object in a plurality of resonant cavitys; Each resonant cavity sidewall all is connected with the frequency tuning screw that extends in the resonant cavity; The utility model adopts said structure, and overall structure is simple, is convenient to realize; Easily manufactured; The utility model can be accomplished the adjusting to resonant cavity interior resonance frequency in when work through the regulating frequency tuning screw, and less to the coupling influence between resonant cavity and the transmission line during regulating frequency tuning screw, and then is convenient to the fine setting of the utility model; Be provided with the capacitive character metallic object in the transmission line of the utility model, the utility model connects the characteristic impedance and the electrical length of the transmission line between the adjacent resonators through capacitive character metallic object scalable, and then can improve the band resistance characteristic of the utility model.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
The pairing name of Reference numeral is called in the accompanying drawing: 1, transmission line inner wire, 2, the transmission line outer conductor, 3, resonant cavity, 4, coupling component; 5, metallic object, 6, the frequency tuning screw, 7, the coupling tuning screw; 8, coaxial fitting, 9, the metal location-plate, 10, the capacitive character metallic object.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is done further to specify, but the execution mode of the utility model is not limited thereto.
Embodiment:
As shown in Figure 1, tunable band-stop 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 through coupling component 4 and transmission line.Be provided with metallic object 5 in a plurality of resonant cavitys 3, and each resonant cavity 3 sidewall all is connected with the frequency tuning screw 6 that extends in the resonant cavity 3.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 relatively is 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 the 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 the transmission line outer conductor 2 with the link of transmission line.Be provided with capacitive character metallic object 10 in the transmission line, wherein, capacitive character metallic object 10 specifically is arranged in the insulating medium layer and with transmission line inner wire 1 or transmission line outer conductor 2 and is connected, and capacitive character metallic object 10 is connected on the transmission line outer conductor 2 in the present embodiment.
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 the transmission line outer conductor 2 through dog screw, and the inner wire of coaxial fitting 8 is connected with transmission line inner wire 1 after passing metal location-plate 9, transmission line outer conductor 2, insulating medium layer successively.
As stated, then can well realize the utility model.
Claims (5)
1. tunable band-stop filter; Comprise transmission line and a plurality of resonant cavity (3); The sidewall of said a plurality of resonant cavity (3) is provided with coupling component (4), and said resonant cavity (3) is connected through coupling component (4) and transmission line, it is characterized in that: be provided with capacitive character metallic object (10) in the said transmission line; Be provided with metallic object (5) in said a plurality of resonant cavity (3), and each resonant cavity (3) sidewall all is connected with the frequency tuning screw (6) that extends in the resonant cavity (3).
2. tunable band-stop filter according to claim 1; It is characterized in that: said transmission line comprises transmission line inner wire (1), insulating medium layer and transmission line outer conductor (2); Said transmission line outer conductor (2) is set on the transmission line inner wire (1); Said insulating medium layer is positioned between transmission line outer conductor (2) and the transmission line inner wire (1), and said capacitive character metallic object (10) is arranged in the insulating medium layer and with transmission line outer conductor (2) and is connected.
3. tunable band-stop filter according to claim 2; It is characterized in that: the two ends of said transmission line are equipped with coaxial fitting (8), and the inner wire of said coaxial fitting (8) is connected with transmission line inner wire (1) after passing transmission line outer conductor (2), insulating medium layer successively.
4. tunable band-stop filter according to claim 3 is characterized in that: the two ends of said transmission line all are connected with metal location-plate (9), and the inner wire of said coaxial fitting (8) passes metal location-plate (9).
5. according to described any tunable band-stop filter of claim 2～4; It is characterized in that: said a plurality of resonant cavitys (3) are positioned at the same side of transmission line; The opposite side that said transmission line is provided with resonant cavity (3) side relatively is connected with coupling tuning screw (7), and said coupling tuning screw (7) one ends embed in the transmission line outer conductor (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220337709 CN202633483U (en) | 2012-07-13 | 2012-07-13 | Adjustable band-rejection filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220337709 CN202633483U (en) | 2012-07-13 | 2012-07-13 | Adjustable band-rejection filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202633483U true CN202633483U (en) | 2012-12-26 |
Family
ID=47386636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220337709 Expired - Fee Related CN202633483U (en) | 2012-07-13 | 2012-07-13 | Adjustable band-rejection filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202633483U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545586A (en) * | 2012-07-13 | 2014-01-29 | 成都市宏山科技有限公司 | Adjustable band rejection filter |
-
2012
- 2012-07-13 CN CN 201220337709 patent/CN202633483U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545586A (en) * | 2012-07-13 | 2014-01-29 | 成都市宏山科技有限公司 | Adjustable band rejection filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20130713 |