CN202772254U - Low intermodulation high isolation co-frequency path-combining unit - Google Patents
Low intermodulation high isolation co-frequency path-combining unit Download PDFInfo
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- CN202772254U CN202772254U CN 201220468502 CN201220468502U CN202772254U CN 202772254 U CN202772254 U CN 202772254U CN 201220468502 CN201220468502 CN 201220468502 CN 201220468502 U CN201220468502 U CN 201220468502U CN 202772254 U CN202772254 U CN 202772254U
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- electric bridge
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Abstract
The present utility model discloses a Low intermodulation high isolation co-frequency path-combining unit. The unit comprises a 3db electric bridge, a first input end and a second input end of the 3db electric bridge are respectively connected with an annular device, the two annular devices are all respectively provided with three ports, wherein a first port is respectively connected with an emission filter, and a second interface is respectively connected with a load. Through connecting the emission filter on the first port of each annular device, the aim of co-frequency isolation 50db can be realized, and unfavorable influences brought by intermodulation interferences can be solved.
Description
Technical field
The utility model relates to a kind of communication equipment field, relates more specifically to the high isolation of a kind of low intermodulation with the frequency combiner unit.
Background technology
Be a kind of four port microwave passive component with the frequency combiner unit, be widely used in synthesizing or a signal is divided into to two signals that there is no the phase mutual interference signal in wireless distribution system.Usually realize that method that the homologous ray different carrier closes road is for being used the 3db electric bridge, its intermodulation can be very low, but the isolation of itself can only reach at most 27db, is difficult to realize higher insulation request.For this reason, some implementation methods are also arranged for increasing circulator at the input of 3db electric bridge to realize with the requirement of frequently isolating 50db, but circulator this as ferrite device, himself intermodulation product is very high, thereby cause the intermodulation level of whole system to raise, reduce the sensitivity of receiver.
Summary of the invention
The purpose of this utility model is, provides the high isolation of low intermodulation that a kind of passive intermodulation index is good, the isolation index is outstanding same combiner unit frequently.
For realizing the purpose of this utility model, intend by the following technical solutions:
The high isolation of a kind of low intermodulation is with the frequency combiner unit, comprise a 3db electric bridge, it is characterized in that, the first input end of described 3db electric bridge and the second input are connected with respectively a circulator, described two circulators all have three ports, wherein, the first port is connected with respectively an emission filter, and the second port is connected with respectively a load.
Further, the 3rd port of described two circulators is connected with the second input with the first input end of 3db electric bridge respectively.
The utility model connects emission filter by the first port at circulator, and the filter that receives frequency range is had to the isolation more than 90db, thereby reduce intermodulation, be-150dbc, both guaranteed the isolation of 50db between input port, guarantee again Intermodulation Interference is dropped to minimum, solve the adverse effect that Intermodulation Interference is brought.
The beneficial effects of the utility model:
1, the passive intermodulation index is good.Inter-modulated signal+43dbm transfers to circulator through emission filter, the back reflection decay, and because filter has the isolation more than 90db to receiving frequency range, thereby intermodulation product is difficult to fall in the band of receiver.
2, the isolation index is outstanding.Owing to adopting circulator, being isolated into about 25db of itself, add the isolation of electric bridge 27db, thereby guarantee the height isolation of 50db.
The accompanying drawing explanation
Fig. 1 is generalized section of the present utility model.
Label in figure is, 1, the 3db electric bridge; 2, circulator; 3, emission filter; 4, load.
Embodiment
Further illustrate the technical solution of the utility model below in conjunction with drawings and Examples.
In conjunction with Fig. 1, the high isolation of a kind of low intermodulation that the present embodiment proposes is with the frequency combiner unit, comprise a 3db electric bridge, the first input end of 3db electric bridge is connected respectively a circulator with the second input, the first port of circulator connects emission filter, the second port connects load, and the 3rd port of two circulators is connected with the second input with the first input end of 3db electric bridge respectively.The utility model connects emission filter by the first port at circulator, and the filter that receives frequency range is had to the isolation more than 90db, thereby reduce intermodulation, be-150dbc, both guaranteed the isolation of 50db between input port, guarantee again Intermodulation Interference is dropped to minimum, solve the adverse effect that Intermodulation Interference is brought.
Claims (2)
1. the one kind low high isolation of intermodulation is with the frequency combiner unit, comprise a 3db electric bridge, it is characterized in that, the first input end of described 3db electric bridge and the second input are connected with respectively a circulator, described two circulators all have three ports, wherein, the first port is connected with respectively an emission filter, and the second interface is connected with respectively a load.
2. the high isolation of a kind of low intermodulation according to claim 1, with the frequency combiner unit, is characterized in that, the 3rd port of described two circulators is connected with the second input with the first input end of 3db electric bridge respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220468502 CN202772254U (en) | 2012-09-14 | 2012-09-14 | Low intermodulation high isolation co-frequency path-combining unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220468502 CN202772254U (en) | 2012-09-14 | 2012-09-14 | Low intermodulation high isolation co-frequency path-combining unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202772254U true CN202772254U (en) | 2013-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220468502 Expired - Fee Related CN202772254U (en) | 2012-09-14 | 2012-09-14 | Low intermodulation high isolation co-frequency path-combining unit |
Country Status (1)
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| CN (1) | CN202772254U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103430815A (en) * | 2013-08-30 | 2013-12-11 | 厦门辰一电气有限公司 | Irrigating system stable in water pressure |
| CN103746160A (en) * | 2013-12-25 | 2014-04-23 | 北京星河亮点技术股份有限公司 | Combiner module and combiner device |
| CN105244584A (en) * | 2015-10-30 | 2016-01-13 | 世达普(苏州)通信设备有限公司 | Link structure capable of improving return loss of POI output port |
| CN108039549A (en) * | 2017-12-29 | 2018-05-15 | 荆门市亿美工业设计有限公司 | A kind of same frequency combiner equipped with main rectangular band |
-
2012
- 2012-09-14 CN CN 201220468502 patent/CN202772254U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103430815A (en) * | 2013-08-30 | 2013-12-11 | 厦门辰一电气有限公司 | Irrigating system stable in water pressure |
| CN103746160A (en) * | 2013-12-25 | 2014-04-23 | 北京星河亮点技术股份有限公司 | Combiner module and combiner device |
| CN103746160B (en) * | 2013-12-25 | 2015-10-28 | 北京星河亮点技术股份有限公司 | Close road module and close road device |
| CN105244584A (en) * | 2015-10-30 | 2016-01-13 | 世达普(苏州)通信设备有限公司 | Link structure capable of improving return loss of POI output port |
| CN108039549A (en) * | 2017-12-29 | 2018-05-15 | 荆门市亿美工业设计有限公司 | A kind of same frequency combiner equipped with main rectangular band |
| CN108039549B (en) * | 2017-12-29 | 2019-01-11 | 荆门市亿美工业设计有限公司 | A kind of same frequency combiner equipped with main rectangular band |
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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: 20130306 Termination date: 20140914 |
|
| EXPY | Termination of patent right or utility model |