CN202333096U - Miniaturized band elimination filter - Google Patents
Miniaturized band elimination filter Download PDFInfo
- Publication number
- CN202333096U CN202333096U CN 201120457280 CN201120457280U CN202333096U CN 202333096 U CN202333096 U CN 202333096U CN 201120457280 CN201120457280 CN 201120457280 CN 201120457280 U CN201120457280 U CN 201120457280U CN 202333096 U CN202333096 U CN 202333096U
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- transmission line
- resonant cavity
- tuning screw
- inner wire
- outer conductor
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Abstract
The utility model discloses a miniaturized band elimination filter, which comprises a transmission line inner conductor, a transmission line outer conductor, at least two resonant cavities, a frequency tuning screw, a matching turning screw, a bending metal rod and a metal plate. The miniaturized band elimination filter has the characteristics that the processing is simple, the processing cost is low, and the filter miniaturization is convenient to realize. The miniaturized band elimination filter can be widely used in electronic systems in various microwave bands, particularly in the civil and military fields such as radar, missile guidance, communication and the like.
Description
Technical field
The utility model relates to filter, specifically, relates to a kind of a kind of frequency of coaxial transmission line and resonant cavity coupling formation and band stop filter that bandwidth can be regulated of utilizing, and frequency tuning screw and coupling tuning screw are all in the same side.The utility model biggest advantage is: the metal pole of curved is set in the resonant cavity, and the pole upper end adds the metallic plate cap, makes the size of filter reach miniaturization, obtains higher relatively Q value simultaneously.
Background technology
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 is 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.These resonant cavitys in transmission line one side for opening wide structure.Open wide structure through these and realize the coupling between transmission line and the resonant cavity.Be provided with metal column in the resonant cavity; Can change the height of metal column through the frequency tuning screw of resonant cavity top; Reach the frequency of tuned filter; We are provided with and the coupling tuning screw of frequency tuning screw in the same side in this structure, and the degree of depth that gets into the transmission line outer conductor through the coupling tuning screw changes the electrical length of transmission line, reaches better matching.The general metallic object that uses all is rectangular column or cylindrical metal post in this Filter Design; Like this often can't reach the requirement of the higher miniaturization of filter; What here we used is crooked metal pole, and the upper end of pole is added with metallic plate, and this can reduce the size and the weight of filter greatly; Obtain higher relatively Q value simultaneously, the band stop filter performance of designing good and
And reach the lightweight requirement of miniaturization.
The utility model content
The purpose of the utility model is to provide that a kind of processing is simple, the structure lightweight band stop filter of miniaturization more.
In order to achieve the above object; The technical scheme that the utility model adopts is: a kind of miniaturization band stop filter; Comprise transmission line inner wire, transmission line outer conductor, at least 2 resonant cavitys, said transmission line inner wire be shaped as column, its axial direction is parallel with the filter bottom surface; Said transmission line outer conductor is communicated with resonant cavity through coupled structure; Said resonant cavity is the column cavity, and there are metallic rod and metallic plate in its inside of resonant cavity; Said coupled structure is the air gap between metallic plate and transmission line inner wire; Said metallic rod is bent successively by the straight rod of plurality of sections metal and connects and composes; Its cross section is a rectangle; Metallic rod links to each other with the base of resonant cavity; Metallic rod links to each other with metallic plate away from an end of filter cavity base, and the straight excellent axis normal of metal that is connected in resonant cavity one end is in the resonant cavity bottom surface, and the straight excellent axis normal of metal that is connected in metallic plate one end is in the resonant cavity bottom surface.
Said metallic rod is only in the enterprising line bend of XY face; The metallic plate that links to each other with the metallic rod upper end is a rectangle and parallel with the resonant cavity base; Said Y direction dictates is vertical with filter mounts and is pointed to the direction of filter cover board by filter mounts; The Z direction is to be parallel to promptly to point to right-handly in transmission line inner wire axial direction and the direction of pointing to power transfer, and directions X be vertical with the YZ face and sensing paper direction inwards.
Another kind of metallic rod is same only carries out bending at the XY face, and two sidewalls of the metallic plate parallel with the resonant cavity base on the XY face are directed downwards bending extension to-Y.
Also have a kind of metallic rod simultaneously at directions X, the Y direction, the Z direction is crooked, with resonant cavity
Parallel two sidewalls of metallic plate on the XY face of base are directed downwards bending to-Y.
Said resonant cavity all is communicated with the transmission line outer conductor, and the upper surface of resonant cavity and transmission line outer conductor are parallel and partially overlap away from the upper surface of resonant cavity.
Be provided with the frequency tuning screw on the said cover plate; Said tuning screw runs through cover plate and extends into intra; And have the gap between frequency tuning screw and the metallic plate, and the axis of said frequency tuning screw does not contact with the downward projection of transmission line inner wire with the downward projection that the axis of transmission line inner wire is vertical and frequency tuning screw.
Filter cover board is provided with the coupling tuning screw, and said coupling tuning screw runs through cover plate, and to extend into the transmission line outer conductor inner, and the coupling tuning screw be positioned at the transmission line inner wire directly over, have the gap between coupling tuning screw and the transmission line inner wire.
Also comprise the medium that supports the transmission line inner wire, the two ends up and down of medium link to each other with base with the cover plate of filter respectively.
Transmission line outer conductor two ends are connected with a pair of coaxial line joint and carry out feed.
The operation principle of band stop filter:
At first, electromagnetic wave signal is input to the transmission line and along transmission line from an end of transmission line.When signal ran into coupled structure, this signal was distributed for the first time.Wherein a part continues transmission along transmission line, and another part gets in the resonant cavity and is reflected, and is distributed for the second time.Respectively along transmission line and reflection.
In certain frequency, from resonant cavity, reflect along the signal of transmission line and the signal phase that distributes the back along transmission line for the first time and differ 180 when spending, two parts of signals will be cancelled out each other, and make that to continue the resultant signal amplitude of transmission along transmission line very low.At this moment, most of signal of this frequency returns along transmission line and can not be along transmission line.A resonant cavity like this plays
The effect that stops some frequency signal to pass through.Along the feasible place of several resonant cavitys that transmission line is arranged
Signal in stop-band frequency still less passes through, and lets simultaneously be in more the passing through of signal in the passband more.
The advantage of the utility model is that processing is simple, filter size reduces lightweight advantage greatly.
Description of drawings
The sketch map that Fig. 1 cuts open along the YZ face for the utility model embodiment 1.
Fig. 2 is the sketch map of the utility model embodiment 1 on the XY face.
The sketch map that Fig. 3 cuts open along the YZ face for the utility model embodiment 2.
Fig. 4 is the sketch map on the YZ face among the utility model embodiment 2.
Fig. 5 is the schematic perspective view of bending metals bar 5 and metallic plate 6 among the utility model embodiment 3.
Embodiment
Below in conjunction with embodiment the utility model is done to specify further, but the utility model execution mode is not limited thereto.
Embodiment 1
As depicted in figs. 1 and 2, a kind of miniaturization band stop filter comprises transmission line inner wire 1,2, at least 2 resonant cavitys 3 of transmission line outer conductor, it is characterized in that, said transmission line inner wire 1 be shaped as column, its axial direction is parallel with the filter bottom surface; Said transmission line outer conductor 2 is communicated with resonant cavity 3 through coupled structure 4; Said resonant cavity 3 is the column cavity, and there are metallic rod 5 and metallic plate 6 in resonant cavity 3 its inside; Said coupled structure 4 is the air gap of 1 of metallic plate 6 and transmission line inner wire; Said metallic rod 5 is bent successively by the straight rod of plurality of sections metal and connects and composes; Its cross section is a rectangle; Metallic rod 5 links to each other with the base of resonant cavity 3; Metallic rod 5 links to each other with metallic plate 6 away from an end of filter cavity 3 bases, and the straight excellent axis normal of metal that is connected in resonant cavity 3 one ends is in resonant cavity 3 bottom surfaces, and the straight excellent axis normal of metal that is connected in metallic plate 6 one ends is in resonant cavity 3 bottom surfaces.
5 of said metallic rod are in the enterprising line bend of XY face; The metallic plate 6 that links to each other with metallic rod 5 upper ends is a rectangle and parallel with resonant cavity 3 bases; Said Y direction dictates is vertical with filter mounts and is pointed to the direction of filter cover board by filter mounts; The Z direction is to be parallel to promptly to point to right-handly in transmission line inner wire 1 axial direction and the direction of pointing to power transfer, and directions X be vertical with the YZ face and sensing paper direction inwards.
Said resonant cavity 3 all is communicated with transmission line outer conductor 2, and the upper surface of resonant cavity 3 and transmission line outer conductor 2 are parallel and partially overlap away from the upper surface of resonant cavity 3.
Said cover plate is provided with frequency tuning screw 7; Said tuning screw 7 runs through cover plate and extends into resonant cavity 3 inside; And have the gap between frequency tuning screw 7 and the metallic plate 6, and the axis of said frequency tuning screw 7 does not contact with the downward projection of transmission line inner wire 1 with the downward projection that the axis of transmission line inner wire 1 is vertical and frequency tuning screw 7.
Described a kind of miniaturization band stop filter; It is characterized in that; It is characterized in that: cover plate is provided with coupling tuning screw 8; Said coupling tuning screw 8 runs through cover plate and extends into transmission line outer conductor 2 inside, and coupling tuning screw 8 be positioned at transmission line inner wire 3 directly over, have the gap between coupling tuning screw 8 and the transmission line inner wire 3.
Also comprise the medium 9 that supports transmission line inner wire 1, the two ends up and down of medium link to each other with base with the cover plate of filter respectively.
Transmission line outer conductor 2 two ends are connected with a pair of coaxial line joint 10 and carry out feed.
As Fig. 3 and shown in Figure 4 be embodiment 2, the difference of itself and embodiment 1 is: said metallic rod 5 is same only in the enterprising line bend of XY face, two sidewalls of the metallic plate 6 parallel with resonant cavity 3 bases on the XY face are directed downwards bending extension to-Y.
As shown in Figure 5, the stereogram of metallic rod 3 and metallic plate 6.The difference of itself and embodiment 1 and embodiment 2 is metallic rod 5 simultaneously at directions X, the Y direction, and the Z direction is carried out bending, and two sidewalls of the metallic plate 6 parallel with resonant cavity 3 bases on the XY face are directed downwards bending to-Y.
Claims (9)
1. a miniaturization band stop filter comprises transmission line inner wire (1), transmission line outer conductor (2), at least 2 resonant cavitys (3), it is characterized in that, said transmission line inner wire (1) be shaped as column, its axial direction is parallel with the filter bottom surface; Said transmission line outer conductor (2) is communicated with resonant cavity (3) through coupled structure (4); Said resonant cavity (3) is the column cavity, and there are metallic rod (5) and metallic plate (6) in its inside of resonant cavity (3); Said coupled structure (4) is the air gap between metallic plate (6) and transmission line inner wire (1); Said metallic rod (5) is bent successively by the straight rod of plurality of sections metal and connects and composes; Its cross section is a rectangle; Metallic rod (5) links to each other with the base of resonant cavity (3); Metallic rod (5) links to each other with metallic plate (6) away from an end of filter cavity (3) base, and the straight excellent axis normal of metal that is connected in resonant cavity (3) one ends is in resonant cavity (3) bottom surface, and the straight excellent axis normal of metal that is connected in metallic plate (6) one ends is in resonant cavity (3) bottom surface.
2. a kind of miniaturization band stop filter according to claim 1; It is characterized in that; Said metallic rod (5) is only in the enterprising line bend of XY face; The metallic plate (6) that links to each other with metallic rod (5) upper end is a rectangle and parallel with resonant cavity (3) base; Said Y direction dictates is vertical with filter mounts and points to the direction of filter cover board by filter mounts, and the Z direction is promptly pointed to right-handly for being parallel in transmission line inner wire (1) axial direction and the direction of pointing to power transfer, and directions X be vertical with the YZ face and sensing paper direction inwards.
3. a kind of miniaturization band stop filter according to claim 1; It is characterized in that; Said metallic rod (5) is same only carries out bending at the XY face, and metallic plate (6) two sidewalls on XY face parallel with resonant cavity (3) base are directed downwards bending extension to-Y.
4. a kind of miniaturization band stop filter according to claim 1 is characterized in that, said metallic rod (5) is simultaneously at directions X, the Y direction, and the Z direction is carried out bending, with resonant cavity
(3) parallel two sidewalls of metallic plate (6) on the XY face of base are directed downwards bending extension to-Y.
5. a kind of miniaturization band stop filter according to claim 1; It is characterized in that; Said resonant cavity (3) all is communicated with transmission line outer conductor (2), and the upper surface of resonant cavity (3) and transmission line outer conductor (2) are parallel and partially overlap away from the upper surface of resonant cavity (3).
6. a kind of miniaturization band stop filter according to claim 1 is characterized in that,
Said cover plate is provided with frequency tuning screw (7); Said tuning screw (7) runs through transmission line outer conductor (2) cover plate and extends into resonant cavity (3) inside; And have the gap between frequency tuning screw (7) and the metallic plate (6), and the axis of said frequency tuning screw (7) does not contact with the downward projection of transmission line inner wire (1) with the downward projection that the axis of transmission line inner wire (1) is vertical and frequency tuning screw (7).
7. a kind of miniaturization band stop filter according to claim 1 is characterized in that,
It is characterized in that: (2) cover plate is provided with coupling tuning screw (8) on the transmission line outer conductor; Said coupling tuning screw (8) runs through cover plate and extends into transmission line outer conductor (2) inside; And coupling tuning screw (8) be positioned at transmission line inner wire (3) directly over, have the gap between coupling tuning screw (8) and the transmission line inner wire (3).
8. a kind of miniaturization band stop filter according to claim 1 is characterized in that, comprises the medium (9) that supports transmission line inner wire (1), and the two ends up and down of medium link to each other with base with the cover plate of filter respectively.
9. according to any said miniaturization band stop filter of claim 2-8, it is characterized in that transmission line outer conductor (2) two ends are connected to a pair of coaxial line joint (10) and carry out feed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120457280 CN202333096U (en) | 2011-11-17 | 2011-11-17 | Miniaturized band elimination filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120457280 CN202333096U (en) | 2011-11-17 | 2011-11-17 | Miniaturized band elimination filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202333096U true CN202333096U (en) | 2012-07-11 |
Family
ID=46445063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120457280 Expired - Fee Related CN202333096U (en) | 2011-11-17 | 2011-11-17 | Miniaturized band elimination filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202333096U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117436A (en) * | 2011-11-17 | 2013-05-22 | 成都赛纳赛德科技有限公司 | Miniaturization band elimination filter |
| CN103545586A (en) * | 2012-07-13 | 2014-01-29 | 成都市宏山科技有限公司 | Adjustable band rejection filter |
| CN103545580A (en) * | 2012-07-13 | 2014-01-29 | 成都市宏山科技有限公司 | Miniaturized adjustable band stop filter |
| CN103545585A (en) * | 2012-07-13 | 2014-01-29 | 成都市宏山科技有限公司 | Compact band-stop filter |
-
2011
- 2011-11-17 CN CN 201120457280 patent/CN202333096U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117436A (en) * | 2011-11-17 | 2013-05-22 | 成都赛纳赛德科技有限公司 | Miniaturization band elimination filter |
| CN103545586A (en) * | 2012-07-13 | 2014-01-29 | 成都市宏山科技有限公司 | Adjustable band rejection filter |
| CN103545580A (en) * | 2012-07-13 | 2014-01-29 | 成都市宏山科技有限公司 | Miniaturized adjustable band stop filter |
| CN103545585A (en) * | 2012-07-13 | 2014-01-29 | 成都市宏山科技有限公司 | Compact band-stop filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20151117 |
|
| EXPY | Termination of patent right or utility model |