CN202839912U - Filter coupling structure - Google Patents
Filter coupling structure Download PDFInfo
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- CN202839912U CN202839912U CN201220486798.1U CN201220486798U CN202839912U CN 202839912 U CN202839912 U CN 202839912U CN 201220486798 U CN201220486798 U CN 201220486798U CN 202839912 U CN202839912 U CN 202839912U
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- coupling
- filter
- coupling piece
- coupling structure
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Abstract
The utility model relates to an electronic component in the communication field, and particularly relates to a filter coupling structure, which comprises a cavity body and steps fixed inside the cavity, wherein a coupling piece and resonance columns are fixed on the steps via bolts; two ends of the coupling piece are respectively located on two adjacent steps and pressed tightly and fixed by the resonance columns; and the middle part of the coupling piece is suspended between the two resonance columns. According to the coupling structure, by changing the length, the width of the coupling piece and the heights of the steps, the coupling coefficient among filter resonators is increased, and the working bandwidth of the filters is then broadened for meeting the capacity requirements of communication system equipment. By adopting the coupling structure provided by the utility model, the coupling coefficient among the filter resonators is increased to three to five times compared with that in the traditional open window coupling structure, and the working bandwidth of the filters is accordingly broadened to three to five times.
Description
Technical field
The utility model relates to the electronic devices and components in the communications field, is specifically related to a kind of coupling structure of filter.
Background technology
Filter is usually used in the outer interference signal of bandwidth of operation is suppressed, and is not subjected to the impact of other clutters to guarantee existing equipment under operating frequency.Along with the development of communication system, the capacity of communication system is increasing, and the bandwidth of operation that needs is also more and more wider.Traditional filter bandwidth of operation can not meet the demands, and the bandwidth of operation of filter is mainly relevant with the coupling coefficient between the filter resonator, and coupling coefficient is larger, and bandwidth of operation is wider.
Summary of the invention
The purpose of this utility model is in order to overcome the deficiencies in the prior art, provides a kind of width by the design coupling piece and coupling piece to increase coupling coefficient apart from the height of cavity bottom and then widens the coupling structure of filter of filter bandwidth of operation.
The technical solution of the utility model is: a kind of coupling structure of filter, comprise cavity and be fixed on the interior step of cavity, be fixed with coupling piece and resonant column by screw on the step, the two ends of coupling piece lay respectively at adjacent two above the step, be fixed by resonant column, the middle part of coupling piece is unsettled between two resonant columns.
Further, described step and cavity are one-body molded.
Further, described coupling piece is rectangle, and four angles are rounding, and the two ends of coupling piece are respectively equipped with symmetrical hole.
Further, described step is the solid cylinder shape, and top center has the hole.
Further, the hollow cylinder shape of described resonant column for not binding, bottom centre has the hole.
Length, width or the height that change step of the utility model by changing coupling piece increases coupling coefficient between the filter resonator, thereby widens the bandwidth of operation of filter, is used for satisfying the capacity requirement of communication system equipment.After adopting the utility model coupled structure, the coupling coefficient between the filter resonator is compared with traditional windowing coupled structure and have been enlarged 3 ~ 5 times, and the bandwidth of operation of filter has also been widened 3 ~ 5 times thereupon.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
Coupling structure of filter as shown in Figure 1, comprise cavity 1 and the step 2 that is fixed in the cavity 1, step 2 is one-body molded with cavity 1, be fixed with coupling piece 3 and resonant column 4 by screw 5 on the step 2, the two ends of coupling piece 3 lay respectively at above two adjacent steps 2, be fixed by resonant column 4, the middle part of coupling piece 3 is unsettled between two resonant columns 4.Coupling piece 3 is rectangle, and its length and width can be set according to the work requirements of filter, and four angles are rounding, and the two ends of coupling piece 4 are respectively equipped with symmetrical hole.Step 2 is the solid cylinder shape, and top center has the hole.The hollow cylinder shape of resonant column 4 for not binding, bottom centre has the hole.Screw 4 passes successively hole on resonant column 4, the coupling piece 3 and is screwed into hole on the step 2, and resonant column 4 and coupling piece 3 are fixed on the step 2.
Length, width or the height that change step 2 of the utility model by changing coupling piece 3 increases coupling coefficient between the filter resonator, thereby widens the bandwidth of operation of filter, is used for satisfying the capacity requirement of communication system equipment.After adopting the utility model coupled structure, the coupling coefficient between the filter resonator is compared with traditional windowing coupled structure and have been enlarged 3-5 doubly, and the bandwidth of operation of filter has also been widened 3-5 doubly thereupon.
Claims (5)
1. coupling structure of filter, comprise cavity and be fixed on the interior step of cavity, be fixed with coupling piece and resonant column by screw on the step, it is characterized in that: the two ends of described coupling piece lay respectively at above the two adjacent steps, be fixed by resonant column, the middle part of coupling piece is unsettled between two resonant columns.
2. a kind of coupling structure of filter as claimed in claim 1, it is characterized in that: described step and cavity are one-body molded.
3. a kind of coupling structure of filter as claimed in claim 1, it is characterized in that: described coupling piece is rectangle, and four angles are rounding, and the two ends of coupling piece are respectively equipped with symmetrical hole.
4. a kind of coupling structure of filter as claimed in claim 1 or 2, it is characterized in that: described step is the solid cylinder shape, and top center has the hole.
5. a kind of coupling structure of filter as claimed in claim 1 is characterized in that: the hollow cylinder shape of described resonant column for not binding, bottom centre has the hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220486798.1U CN202839912U (en) | 2012-09-21 | 2012-09-21 | Filter coupling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220486798.1U CN202839912U (en) | 2012-09-21 | 2012-09-21 | Filter coupling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202839912U true CN202839912U (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220486798.1U Expired - Lifetime CN202839912U (en) | 2012-09-21 | 2012-09-21 | Filter coupling structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202839912U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319444A (en) * | 2014-10-31 | 2015-01-28 | 湖北三江航天险峰电子信息有限公司 | Double-frequency cavity filter compatible to working frequencies of GPS and Beidou |
| US11239536B2 (en) | 2018-05-29 | 2022-02-01 | Huawei Technologies Co., Ltd. | Coupling structure of filter and processing method |
-
2012
- 2012-09-21 CN CN201220486798.1U patent/CN202839912U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319444A (en) * | 2014-10-31 | 2015-01-28 | 湖北三江航天险峰电子信息有限公司 | Double-frequency cavity filter compatible to working frequencies of GPS and Beidou |
| CN104319444B (en) * | 2014-10-31 | 2017-04-19 | 湖北三江航天险峰电子信息有限公司 | Double-frequency cavity filter compatible to working frequencies of GPS and Beidou |
| US11239536B2 (en) | 2018-05-29 | 2022-02-01 | Huawei Technologies Co., Ltd. | Coupling structure of filter and processing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |