CN201893431U - Cavity body filter and coupling structure thereof - Google Patents
Cavity body filter and coupling structure thereof Download PDFInfo
- Publication number
- CN201893431U CN201893431U CN201020129087XU CN201020129087U CN201893431U CN 201893431 U CN201893431 U CN 201893431U CN 201020129087X U CN201020129087X U CN 201020129087XU CN 201020129087 U CN201020129087 U CN 201020129087U CN 201893431 U CN201893431 U CN 201893431U
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- cavity body
- body filter
- connecting rod
- coupling disc
- section
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Abstract
The utility model particularly relates to a cavity body filter which belongs to the technical field of communication and comprises a cavity body, an input-output end, a resonance rod and a coupling structure, wherein the coupling structure comprises a connecting rod and a coupling disc, and the connecting rod is connected with the surface center of the coupling disc; the resonance rod is arranged on the cavity body, the input-output end is arranged on the outer side wall of the cavity body, the outer side of the resonance rod is sectioned by a plane into a section, and the section is right opposite to one side of the coupling disc opposite to the connecting rod. The cavity body filter realizes transmission of a communication signal through the coupling between the coupling disc and the section; compared with the traditional method that a metal wire and the resonance rod are welded to transmit the signal, the above method cannot cause poor contact and other problems caused by welding; therefore, the cavity body filter has better inter-modulation performance than the traditional one.
Description
Technical field
The utility model relates to communication technical field, relates in particular to a kind of cavity body filter and coupled structure thereof.
Background technology
In the base station system of mobile communication, pass through the signal of communication of the carrying communication data in the transmission antennas transmit particular frequency range usually, and by the reception antenna receiving communication signal.Not only comprise the signal of communication of the carrying communication data in the above-mentioned particular frequency range in the signal by the reception antenna reception, but also comprise clutter or interference signal that many above-mentioned particular frequency range are outer.To from the signal that reception antenna receives, obtain the signal of communication of the carrying communication data in the particular frequency range of transmission antennas transmit, usually need the signal that this reception antenna receives is carried out filtering by filter, with the outer clutter or the interference signal filtering of signal of communication characteristic frequency of this carrying communication data.
At present, generally adopt cavity body filter in the base station system.The signal that is received by antenna enters cavity body filter by the input/output terminal of cavity body filter usually, and this input/output terminal is connected with a metal wire or wire.This metal wire or the other end wiry link to each other with resonant rod in the cavity that is arranged at cavity body filter, and then make signal that this antenna receives through behind a plurality of resonant rods, by another input/output terminal output of this cavity body filter.
Yet industry realizes above-mentioned metal wire or wire to be electrically connected with resonant rod by the mode of welding this nonlinear contact usually, causes intermodulation distortion because of the solder joint loose contact easily.
Summary of the invention
In view of this, the utility model provides a kind of cavity body filter that helps reducing intermodulation distortion.
In addition, also be necessary to provide a kind of coupled structure that helps reducing the cavity body filter intermodulation distortion.
A kind of cavity body filter comprises cavity, input/output terminal, resonant rod.Described cavity body filter also comprises coupled structure, and described coupled structure comprises connecting rod and coupling disc, and described connecting rod links to each other with the card center of described coupling disc, and described resonant rod is arranged on the described cavity.Described input/output terminal is arranged on the lateral wall of described cavity, and the outside of described resonant rod is cut by a plane and formed a cross section, and on described cross section and the described coupling disc side relative with connecting rod over against.
In the described cavity body filter, described resonant rod also comprises bar portion and the hollow bulb that is formed by bar portion.
In the described cavity body filter, described cross section is rectangular.
In the described cavity body filter, described coupling disc and described connecting rod are formed in one.
In the described cavity body filter, the other end of described connecting rod links to each other with described input/output terminal by the through hole that is arranged on the described cavity.
In the described cavity body filter, described cavity body filter by mutually over against coupling disc and the coupling between the cross section transmit signal of communication.
In the described cavity body filter, over against described coupling disc and cross section changes it over against area according to stiffness of coupling mutually.
A kind of coupled structure, be used for cavity body filter, this cavity body filter comprises cavity and the resonant rod that is arranged on the cavity, described coupled structure comprises connecting rod and coupling disc, described connecting rod links to each other with the card center of described coupling disc, the outside of described resonant rod is cut by a plane and is formed a cross section, and on described cross section and the described coupling disc with the opposing side of connecting rod over against.
In the described coupled structure, described cross section is rectangular.
In the described coupled structure, described coupling disc and described connecting rod are formed in one.
Above-mentioned cavity body filter and coupled structure are transmitted signal of communication by coupling between coupling disc and the cross section, with respect to the mode of tradition by metal wire or wire and resonant rod welding transmission signal, because its other problem that loose contact can not occur and cause by welding, therefore, the intermodulation performance of above-mentioned cavity body filter is better than traditional cavity body filter.In addition, the coupling disc of this cavity body filter and cross section can change it as required over against area, with the increase stiffness of coupling, or reduce stiffness of coupling.
Description of drawings
Fig. 1 is the schematic diagram of the cavity body filter part of a better embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
See also Fig. 1, cavity body filter 100 comprises cavity 110, resonant rod 130, input/output terminal 140 and coupled structure 150.This cavity 110 is provided with coupling cavity 120, and this resonant rod 130 is arranged on the cavity 110, and is contained in the described coupling cavity 120.This input/output terminal 140 is arranged on the lateral wall of cavity 110.
This resonant rod 130 is long tubular, comprises bar portion 131 and the hollow bulb 133 that is formed by bar portion 131.The outside of this bar portion 131 is cut by a plane, forms a square-section 135.
This coupled structure 150 comprises connecting rod 151 and coupling disc 153.This connecting rod 151 and this coupling disc 153 are formed in one.This coupling disc 153 is one to be the disk of flat, and an end of this connecting rod 151 and the card center of coupling disc 153 join, and the other end of this connecting rod 151 passes the through hole that is opened in cavity 110 sidewalls and links to each other with input/output terminal 140.The relative side panel face of this coupling disc 153 and connecting rod 151 is over against the square-section 135 of described resonant rod 130.The signal of communication that is received by antenna transmits through being coupled between described coupling disc 153 and the described cross section 135.When the stronger stiffness of coupling of needs, can increase between cross section 135 and the coupling disc 153 over against area, when the more weak stiffness of coupling of needs, can reduce between cross section 135 and the coupling disc 153 over against area.
Above-mentioned cavity body filter 100 transmits signal of communication by coupling between coupling disc 153 and the cross section 135, with respect to the mode of tradition by metal wire or wire and resonant rod welding transmission signal, because its other problem that loose contact can not occur and cause by welding, therefore, the intermodulation performance of above-mentioned cavity body filter 100 is better than traditional cavity body filter.In addition, the coupling disc 153 of this cavity body filter 100 and cross section 135 can change it as required over against area, with the increase stiffness of coupling, or reduce stiffness of coupling.
Used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (10)
1. cavity body filter, comprise cavity, input/output terminal, resonant rod, it is characterized in that: described cavity body filter also comprises coupled structure, described coupled structure comprises connecting rod and coupling disc, described connecting rod links to each other with the card center of described coupling disc, described resonant rod is arranged on the described cavity, described input/output terminal is arranged on the lateral wall of described cavity, the outside of this resonant rod is cut by a plane and is formed a cross section, and on described cross section and the described coupling disc side relative with connecting rod over against.
2. cavity body filter as claimed in claim 1 is characterized in that: described resonant rod also comprises bar portion and the hollow bulb that is formed by bar portion.
3. cavity body filter as claimed in claim 1 is characterized in that: described cross section is rectangular.
4. cavity body filter as claimed in claim 1 is characterized in that: described coupling disc and described connecting rod are formed in one.
5. cavity body filter as claimed in claim 1 is characterized in that: the other end of described connecting rod links to each other with described input/output terminal by the through hole that is arranged on the described cavity.
6. cavity body filter as claimed in claim 1 is characterized in that: described cavity body filter by mutually over against coupling disc and the coupling between the cross section transmit signal of communication.
7. cavity body filter as claimed in claim 1 is characterized in that: over against described coupling disc and cross section changes it over against area according to stiffness of coupling mutually.
8. coupled structure, be used for cavity body filter, this cavity body filter comprises cavity and the resonant rod that is arranged on the cavity, described coupled structure comprises connecting rod and coupling disc, described connecting rod links to each other with the card center of described coupling disc, the outside of described resonant rod is cut by a plane and is formed a cross section, and on described cross section and the described coupling disc with the opposing side of connecting rod over against.
9. coupled structure as claimed in claim 8 is characterized in that: described cross section is rectangular.
10. coupled structure as claimed in claim 8 is characterized in that: described coupling disc and described connecting rod are formed in one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020129087XU CN201893431U (en) | 2010-03-12 | 2010-03-12 | Cavity body filter and coupling structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020129087XU CN201893431U (en) | 2010-03-12 | 2010-03-12 | Cavity body filter and coupling structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201893431U true CN201893431U (en) | 2011-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020129087XU Expired - Fee Related CN201893431U (en) | 2010-03-12 | 2010-03-12 | Cavity body filter and coupling structure thereof |
Country Status (1)
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| CN (1) | CN201893431U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637933A (en) * | 2012-01-10 | 2012-08-15 | 深圳市大富科技股份有限公司 | Cavity filter and coupling structure of cavity filter |
| CN102881975A (en) * | 2011-07-14 | 2013-01-16 | 凯镭思通讯设备（上海）有限公司 | Filter realizing coupled transmission zeros |
| CN103840235A (en) * | 2013-12-09 | 2014-06-04 | 福建星海通信科技有限公司 | Improved coupling structure of filter |
| CN104466313A (en) * | 2014-12-22 | 2015-03-25 | 福建星海通信科技有限公司 | Novel adjustable filter |
-
2010
- 2010-03-12 CN CN201020129087XU patent/CN201893431U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102881975A (en) * | 2011-07-14 | 2013-01-16 | 凯镭思通讯设备（上海）有限公司 | Filter realizing coupled transmission zeros |
| CN102881975B (en) * | 2011-07-14 | 2015-04-08 | 凯镭思通讯设备（上海）有限公司 | Filter realizing coupled transmission zeros |
| CN102637933A (en) * | 2012-01-10 | 2012-08-15 | 深圳市大富科技股份有限公司 | Cavity filter and coupling structure of cavity filter |
| CN103840235A (en) * | 2013-12-09 | 2014-06-04 | 福建星海通信科技有限公司 | Improved coupling structure of filter |
| CN103840235B (en) * | 2013-12-09 | 2016-03-02 | 福建星海通信科技有限公司 | The coupled structure of Modified Filter |
| CN104466313A (en) * | 2014-12-22 | 2015-03-25 | 福建星海通信科技有限公司 | Novel adjustable 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20160312 |