CN202405398U - Miniature band-pass filter - Google Patents
Miniature band-pass filter Download PDFInfo
- Publication number
- CN202405398U CN202405398U CN 201120457283 CN201120457283U CN202405398U CN 202405398 U CN202405398 U CN 202405398U CN 201120457283 CN201120457283 CN 201120457283 CN 201120457283 U CN201120457283 U CN 201120457283U CN 202405398 U CN202405398 U CN 202405398U
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- Prior art keywords
- cavity
- pass filter
- base
- metallic
- band pass
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Abstract
The present utility model discloses a miniature band-pass filter. The filter comprises a cavity, a pedestal, a metal rod, a metal plate, and an coaxial input and output structure composed of an inner conductor and an outer conductor; the inner conductor is connected with the metal rod or the metal plate, the upper end of the metal rod is connected with the metal plate, the lower end of the metal rod is connected with the pedestal, the cavity is composed of a top cover and a side wall, and the cavity is divided into at least two chambers by separating plates in the axis direction. The filter is characterized in that metal rod is a bending conductor which is formed by a cuboid parallel with one edge of three edges of the cavity, and the metal rod is only bent within a plane parallel or vertical with an axis of the cavity. Two ends of the metal plate, which are on the axis direction of the cavity, are bent toward the pedestal direction within a plane which is parallel with the axis of the cavity and vertical with the pedestal. The filter is simple to process, and the volume of a small cavity band-pass filter can be greatly reduced. The band-pass filter is expected to be used in electronic systems of various microwave wave bands, especially in radar, missile guidance, communication and other military and civil fields.
Description
Technical field
The utility model relates to a kind of compact filter, and specifically, a kind of electric capacity and inductance of utilizing simultaneously loads the miniaturization band pass filter.
Background technology
Common cavity band-pass filter, its resonant cavity is cavity, causes the overall volume of filter excessive, and particularly under the lower situation of frequency, it is particularly outstanding that this drawback seems.In order to address this problem, people mostly adopt the method for metal column capacitive load, like common comb filter, comprise cavity, be positioned at least 2 broach and the input/output structure of cavity, and this filter has the characteristics of volume compact.Yet; Owing to receive the restriction of housing depth; Though this method of directly utilizing metal column to load can make the smaller volume of cavity body filter, this diminishing is limited, and we need seek new method and do better the miniaturization of cavity band-pass filter.
The utility model content
The purpose of the utility model provides a kind of miniaturization band pass filter, with the miniaturization of further realization band pass filter.
To achieve these goals; The technical scheme that the utility model adopts is: a kind of miniaturization band pass filter comprises cavity, the base that is connected with cavity; Cavity is divided at least 2 cavitys at axis direction by dividing plate, and the coaxial input/output structure that is made up of inner wire and outer conductor; Metallic rod and metallic plate are arranged on cavity inside; Inner wire is connected with metallic rod or metallic plate; The metallic rod upper end links to each other with metallic plate, and the metallic rod lower end links to each other with base, and said cavity is made up of top cover and sidewall; Said coaxial input/output structure runs through on the left and right sides sidewall that is arranged on cavity, and said metallic rod is a curved conductor.
Said metallic rod with cavity parallel axes or vertical plane inner bending.
Said cavity is a cuboid, and said base is a cuboid, and said dividing plate is a cuboid, and said metallic plate is a cuboid, and each limit corresponding with the cavity of cuboid, each limit of said dividing plate and metallic plate is parallel.
Said metallic plate at the two ends of cavity axis direction with the cavity parallel axes and crooked in perpendicular to the plane of base to the base direction.Generally be: said metallic plate two ends with the plane of cavity axis normal in crooked to the base direction.
Said dividing plate is provided with the coupled structure that is communicated with the adjacent cavities microwave signal.
Said metallic rod by with three limits of cavity in arbitrarily on one side at least 4 parallel cuboids constitute.
Begin from base; The direction of routing of metallic rod be followed successively by the Y direction ,-the Z direction ,-directions X, Y direction, Z direction, directions X, Y direction; Wherein the Z direction is the axis direction of cavity; The Y direction is to point to the direction of cover plate perpendicular to base, and directions X is and Z direction and all vertical direction of Y direction that directions X, Y direction and Z direction meet right-hand rule.
Based on foregoing.The utility model comprises cavity, base, metallic rod, metallic plate, the coaxial input/output structure that is made up of inner wire and outer conductor.
Said cavity is a cuboid, and said base is a cuboid, and said dividing plate is a cuboid, and said metallic plate is a cuboid, and said dividing plate is parallel with corresponding each limit with the cuboid cavity, each limit of said metallic plate.Said dividing plate is provided with the coupled structure that is communicated with the adjacent cavities microwave signal.Said metallic plate at the two ends of cavity axis direction with the cavity parallel axes and crooked in perpendicular to the plane of base to the base direction.
The operation principle of band pass filter is:
When signal got into filter and runs into first resonant cavity, this signal was distributed for the first time.Wherein a part continues transmission along filter, and another part doubly first resonant cavity is reflected.Signal along filter continuation transmission will run into second resonant cavity again, experience similar process, until export from filter through all resonant cavitys.
In some frequency, the signal that from all resonant cavitys, reflects is all offset, and the signal of these frequencies will be exported from filter output, and loss is very little.The signal of frequency in addition, the signal that from all resonant cavitys, reflects stack, the signal of these frequencies will reflect from filter input end, and will be very little from the signal of output output.Utilize this specific character, the signal low-loss that filter can be made way in the band connection frequency is passed through, and the signal reflex of making way in the stopband is fed back into end.
The utility model is provided with metallic rod and becomes crooked shape, can effectively increase the length of metallic rod, increases filter effect.
The advantage of the utility model is to process volume simple, that can reduce cavity band-pass filter greatly.The band pass filter of the utility model is expected to be widely used in the electronic system of each microwave band, particularly military affairs and civil areas such as radar, missile guidance, communication.
Description of drawings
Fig. 1 is the cross-sectional schematic of the utility model.
Fig. 2 is that the A-A of the utility model is to cross-sectional schematic.
Fig. 3 is the schematic three dimensional views of embodiment one metallic plate, metallic rod and base.
Fig. 4 is embodiment two metallic plates, metallic rod and base along continuous straight runs sketch map.
Direction described in this paper defines as follows:
Cavity 1 axis direction refers to the longest centerline direction on one side of filter.Corresponding direction from left to right in Fig. 1.Vertical direction refers to point to filter cavity direction, corresponding vertical direction in Fig. 1 from filter mounts.Horizontal direction, the corresponding direction of pointing to the reader from paper in Fig. 1.
Embodiment
Below in conjunction with embodiment the utility model is done to specify further, but the execution mode of the utility model is not limited thereto.
Embodiment one
Like Fig. 1,2, a kind of miniaturization band pass filter shown in 3, comprise cavity 1, the base 3 that is connected with cavity 1, cavity 1 is divided at least 2 cavitys at axis direction by dividing plate 2, and the coaxial input/output structure that is made up of inner wire 6 and outer conductor 7; Metallic rod 4 is arranged on cavity inside with metallic plate 5; Inner wire 6 is connected with metallic rod 4 or metallic plate 5; Metallic rod 4 upper ends link to each other with metallic plate 5, and metallic rod 4 lower ends link to each other with base 3, and said cavity 1 is made up of top cover and sidewall; Said coaxial input/output structure runs through on the left and right sides sidewall that is arranged on cavity 1, and said metallic rod 4 is a curved conductor.
Said metallic rod 4 with cavity 1 parallel axes or vertical plane inner bending.
Said cavity 1 is a cuboid, and said base is a cuboid, and said dividing plate 2 is a cuboid, and said metallic plate 5 is a cuboid, and each limit that each limit of said dividing plate 2 and metallic plate 5 and the cavity of cuboid 1 are corresponding is parallel.
Said metallic plate 5 at the two ends of cavity 1 axis direction with cavity 1 parallel axes and crooked in perpendicular to the plane of base 3 to base 3 directions.
Said dividing plate 2 is provided with the coupled structure 8 that is communicated with the adjacent cavities microwave signal.
Said metallic rod 4 by with three limits of cavity 1 in arbitrarily on one side at least 4 parallel cuboids constitute.
From base 3 beginnings; The direction of routing of metallic rod 4 be followed successively by the Y direction ,-the Z direction ,-directions X, Y direction, Z direction, directions X, Y direction; Wherein the Z direction is the axis direction of cavity 1; The Y direction is to point to the direction of cover plate perpendicular to base (3), and directions X is and Z direction and all vertical direction of Y direction that directions X, Y direction and Z direction meet right-hand rule.
Embodiment two
As shown in Figure 4, a kind of miniaturization band pass filter, its structure metallic plate 5 is outside the rectangular flat parallel with base 3, all the other with embodiment one in identical.
Claims (8)
1. miniaturization band pass filter; It is characterized in that, comprise cavity (1), the base (3) that is connected with cavity (1); Cavity (1) is divided at least 2 cavitys at axis direction by dividing plate (2), and the coaxial input/output structure that is made up of inner wire (6) and outer conductor (7); Metallic rod (4) and metallic plate (5) are arranged on cavity inside; Inner wire (6) is connected with metallic rod (4) or metallic plate (5); Metallic rod (4) upper end links to each other with metallic plate (5); Metallic rod (4) lower end links to each other with base (3); Said cavity (1) is made up of top cover and sidewall, and said coaxial input/output structure runs through on the left and right sides sidewall that is arranged on cavity (1).
2. miniaturization band pass filter according to claim 1 is characterized in that, said metallic rod (4) is a curved conductor.
3. miniaturization band pass filter according to claim 1 is characterized in that, said metallic rod (4) with cavity (1) parallel axes or vertical plane inner bending.
4. miniaturization band pass filter according to claim 1; It is characterized in that; Said base (3) is a cuboid, and said cavity (1) is a cuboid, and said dividing plate (2) is a cuboid; Said metallic plate (5) is a cuboid, and each limit corresponding with the cavity (1) of cuboid, each limit of said dividing plate (2) and metallic plate (5) is parallel.
5. miniaturization band pass filter according to claim 3 is characterized in that, said metallic plate (5) at the two ends of cavity (1) axis direction with cavity (1) parallel axes and crooked in perpendicular to the plane of base (3) to base (3) direction.
6. miniaturization band pass filter according to claim 1 is characterized in that, said dividing plate (2) is provided with the coupled structure (8) that is communicated with the adjacent cavities microwave signal.
7. miniaturization band pass filter according to claim 3 is characterized in that, said metallic rod (4) by with three limits of cavity (1) in arbitrarily on one side at least 4 parallel cuboids constitute.
8. according to any described miniaturization band pass filter among the claim 1-6; It is characterized in that, from base (3) beginning, the direction of routing of metallic rod (4) be followed successively by the Y direction ,-the Z direction ,-directions X, Y direction, Z direction, directions X, Y direction; Wherein the Z direction is the axis direction of cavity (1); The Y direction is to point to the direction of cover plate perpendicular to base (3), and directions X is and Z direction and all vertical direction of Y direction that directions X, Y direction and Z direction meet right-hand rule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120457283 CN202405398U (en) | 2011-11-17 | 2011-11-17 | Miniature band-pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120457283 CN202405398U (en) | 2011-11-17 | 2011-11-17 | Miniature band-pass filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202405398U true CN202405398U (en) | 2012-08-29 |
Family
ID=46703025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120457283 Withdrawn - After Issue CN202405398U (en) | 2011-11-17 | 2011-11-17 | Miniature band-pass filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202405398U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117433A (en) * | 2011-11-17 | 2013-05-22 | 成都赛纳赛德科技有限公司 | Miniaturization band-pass filter |
-
2011
- 2011-11-17 CN CN 201120457283 patent/CN202405398U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117433A (en) * | 2011-11-17 | 2013-05-22 | 成都赛纳赛德科技有限公司 | Miniaturization band-pass filter |
| CN103117433B (en) * | 2011-11-17 | 2015-04-22 | 成都赛纳赛德科技有限公司 | Miniaturization band-pass filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120829 Effective date of abandoning: 20150422 |