CN208970714U - A kind of coupler and communication device - Google Patents
A kind of coupler and communication device Download PDFInfo
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- CN208970714U CN208970714U CN201821654124.1U CN201821654124U CN208970714U CN 208970714 U CN208970714 U CN 208970714U CN 201821654124 U CN201821654124 U CN 201821654124U CN 208970714 U CN208970714 U CN 208970714U
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Abstract
This application discloses a kind of coupler and communication devices.The coupler includes coupler circuit and an at least isolation circuit, wherein the isolated port that an at least isolation circuit is coupled in coupler circuit, isolation circuit is for being isolated the radiofrequency signal for reflexing to coupler circuit from isolated port.In this way, it can be improved the isolation of coupler.
Description
Technical field
This application involves radio frequency arts, more particularly to a kind of coupler and communication device.
Background technique
In frequency communication devices, coupler will use, coupler is used to couple radiofrequency signal with certain degree of coupling
Out, individually to be observed or to be tested, coupler can be used in various radio circuits.
Present inventor has found that the isolation of coupler can be loaded with isolated port in long-term R&D work
Variation and change, load precision it is inadequate when, need accordingly to be debugged, to optimize the isolation of coupler, and for increasing
Add the isolation of coupling, it usually needs lose other indexs of correlation of coupler, such as Coupling flatness is deteriorated or volume increases
Add.
Utility model content
The application is mainly solving the technical problems that provide a kind of coupler and communication device, to improve the isolation of coupler
Degree.
In order to solve the above technical problems, the technical solution that the application uses is: providing a kind of coupler, the coupler
Including coupler circuit；The isolated port that an at least isolation circuit, at least an isolation circuit are coupled in coupler circuit, isolation electricity
Road is for being isolated the radiofrequency signal for reflexing to coupler circuit from isolated port.
Wherein, isolation circuit includes isolator, and the input port of isolator and the isolated port of coupler circuit couple, every
Output port and the first load coupled from device.
Wherein, isolation circuit includes circulator, and the first port of circulator and the isolated port of coupler circuit couple, ring
The second port of shape device and the first load coupled.
Wherein, isolation circuit further comprises the second load, the third port of circulator and the second load coupled.
Wherein, an at least isolation circuit includes the first isolation circuit and the second isolation circuit, the first isolation circuit and second
Isolation circuit is coupled with the isolated port of coupler circuit in a series arrangement.
Wherein, coupler circuit includes: main transmission line, for exporting radiofrequency signal from the input port of coupler circuit
To the output port of coupler circuit；Coupled transmission line couples setting with main transmission line, to obtain coupling letter from main transmission line
Number, and coupled signal is exported to the coupling port of coupler circuit and isolated port.
In order to solve the above technical problems, another technical solution that the application uses is: providing a kind of communication device, this is logical
T unit includes above-mentioned coupler, which includes coupler circuit；The coupling of an at least isolation circuit, at least an isolation circuit
In the isolated port of coupler circuit, isolation circuit is for being isolated the radiofrequency signal for reflexing to coupler circuit from isolated port.
Wherein, isolation circuit includes isolator, and the input port of isolator and the isolated port of coupler circuit couple, every
Output port and the first load coupled from device.
Wherein, isolation circuit includes circulator, and the first port of circulator and the isolated port of coupler circuit couple, ring
The second port of shape device and the first load coupled.
Wherein, isolation circuit further comprises the second load, the third port of circulator and the second load coupled.
The beneficial effect of the application is: be different from the prior art, the embodiment of the present application coupler include coupler circuit and
An at least isolation circuit, wherein at least one isolation circuit is coupled in the isolated port of coupler circuit, isolation circuit be used for every
From the radiofrequency signal for reflexing to coupler circuit from isolated port.In this way, can by an at least isolation circuit every
From the radiofrequency signal for reflexing to coupler circuit from isolated port, without being debugged to load or coupler circuit, with
Guarantee the other performance of coupler, accordingly, with respect to the prior art, the application can be improved the isolation of coupler.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of directional coupler；
Fig. 2 is the structural schematic diagram of the application coupler first embodiment；
Fig. 3 is the structural schematic diagram of isolation circuit in Fig. 2 embodiment coupler；
Fig. 4 is the structural schematic diagram of the application coupler second embodiment；
Fig. 5 is the structural schematic diagram of isolation circuit in Fig. 4 embodiment coupler；
Fig. 6 is the structural schematic diagram of the application coupler 3rd embodiment；
Fig. 7 is the structural schematic diagram of the application coupler fourth embodiment；
Fig. 8 is the structural schematic diagram of one embodiment of the application communication device.
Specific embodiment
The application is described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, Fig. 1 is a kind of structural schematic diagram of coupler.Coupler 101 is a kind of general microwave/millimeter
Parts for wave can be used for isolation, separation and mixing of signal etc..Coupler 101 is a kind of four port networks, and coupler 101 is arranged
There are main channel 102 and coupling channel 103, radiofrequency signal is inputted from the input port 104 of main channel 102, from the defeated of main channel 102
Exit port 105 exports, and coupling channel 103 couples the radiofrequency signal for obtaining certain power, i.e. coupled signal from main channel 102,
The coupled signal of coupling channel 103 can be exported from coupling port 106 and isolated port 107.
In the practical application of coupler, the reflection coefficient S44 of isolated port 107 should be reduced to the greatest extent, S44 is smaller, from negative
The RF signal power that load 108 reflexes to isolated port 107 is smaller.To reduce S44, a kind of method is set in isolated port 107
The load 108 with 103 impedance matching of coupling channel, or setting adjustable resistance are set, by adjusting the impedance of adjustable resistance come real
Now with the impedance matching of coupling channel 103.
But the above method is higher to the impedance required precision of load 108, or needs to exclusively carry out the debugging of adjustable resistance
Deng will increase human and material resources cost, and low efficiency.For this purpose, the application proposes a kind of coupler, as shown in Fig. 2, Fig. 2 is this Shen
Please coupler first embodiment structural schematic diagram.The present embodiment coupler 201 includes coupler circuit 202 and at least one isolation
The isolated port 204 that circuit 203, at least an isolation circuit 203 are coupled in coupler circuit 202, isolation circuit 203 is for being isolated
The radiofrequency signal of coupler circuit 202 is reflexed to from isolated port 204.
It is different from the prior art, the present embodiment, which can be isolated by an at least isolation circuit 203 from isolated port 204, to be reflected
To the radiofrequency signal of coupler circuit 202, without being debugged to load or coupler circuit 202, to guarantee coupler
Other performance, accordingly, with respect to the prior art, the present embodiment can be improved the isolation of coupler 201.
Wherein, the coupler circuit 202 of the present embodiment includes main transmission line 205 and coupled transmission line 206, main transmission line
205 from the input port 207 of coupler circuit 202 for exporting radiofrequency signal to the output port of coupler circuit 202
208；Coupled transmission line 206 couples setting with main transmission line 205, to obtain the coupled signal of radiofrequency signal from main transmission line 205,
And coupled signal is exported to the coupling port 209 of coupler circuit 202 and isolated port 204；Wherein, an at least isolation circuit
203 are coupled in isolated port 204.
The setting of coupling described in the present embodiment includes that coupled transmission line 206 can obtain coupled signal from main transmission line 205
Any set-up mode.
Optionally, as shown in Figures 2 and 3, Fig. 3 is the structural schematic diagram of isolation circuit in Fig. 2 embodiment coupler.This reality
The isolation circuit 203 for applying example includes isolator 210, the input port 301 of isolator 210 and the isolation end of coupler circuit 202
Mouth 204 couples, 211 coupling of the output port 302 of isolator 210 and the first load.
Isolator 210 is a kind of isolator, and when carrying out radio signal transmission, radiofrequency signal can only be from input port 301
Be transmitted to output port 302, therefore, the present embodiment pass through the isolated port 204 of coupler circuit 202 and first load
Isolator 210 is set between 211, it is possible to reduce the radiofrequency signal of isolated port 204, therefore, energy are reflexed to from the first load 211
Enough increase the isolation of coupler 201.
The application it is further proposed that second embodiment coupler, as shown in Figures 4 and 5, Fig. 4 is the application coupler
The structural schematic diagram of two embodiments；Fig. 5 is the structural schematic diagram of circulator in Fig. 4 embodiment coupler.The present embodiment coupler
401 are with the difference of above-mentioned coupler 201: the isolation circuit 402 of the present embodiment coupler 401 includes circulator 403, annular
The first port 501 of device 403 and the isolated port 405 of coupler circuit 404 couple, the second port 502 of circulator 403 and the
One load, 406 coupling.
The third port 503 of the circulator 403 of the present embodiment is hanging.Circulator 403 is penetrated by what first port 501 inputted
Frequency signal can only be exported from second port 502, can only be defeated from third port 503 by the radiofrequency signal inputted from second port 502
Out, it can only be exported from first port 501 by the radiofrequency signal inputted from third port 503.The present embodiment hangs third port 503
Sky can not only reduce from the first load 406 and reflex to the radiofrequency signal of second port 502, and can reduce from third end
Mouth 503 reflexes to the radiofrequency signal of first port 501, therefore can be improved the first port 501 and second port of circulator 403
Isolation between 502.
The application it is further proposed that 3rd embodiment coupler, as shown in Fig. 6 and Fig. 5, the present embodiment coupler 601 with
The difference of above-mentioned coupler 401 is: the isolation circuit 602 of the present embodiment further comprises the second load 603, circulator 403
Third port 503 and second load 603 coupling so that energy of the first port 501 of circulator 403 to second port 502
Transmission coefficient S21 is greater than the energy transmission coefficient S 22 of second port 502 to first port 501.
603 coupling of the third port 503 of circulator 403 and the second load can be made the first of circulator 403 by the present embodiment
Port 501 is greater than the energy transmission coefficient of second port 502 to first port 501 to the energy transmission coefficient of first port 501,
Circulator 403 is equivalent to isolator, when carrying out radio signal transmission, radiofrequency signal can only be from first port 501 and biography
Second port 502 is transported to, therefore can be further able between the first port 501 and second port 502 that improve circulator 403
Isolation.
The application it is further proposed that fourth embodiment coupler, as shown in fig. 7, the present embodiment coupler 701 with it is above-mentioned
The difference of coupler 201 is: the present embodiment coupler 701 includes the first isolation circuit 702 and the second isolation circuit 703, the
One isolation circuit 702 and the second isolation circuit 703 are coupled with the isolated port 705 of coupler circuit 704 in a series arrangement.
The present embodiment coupler 701 between the isolated port 705 of coupler circuit 704 and the first load 706 by setting
Concatenated first isolation circuit 702 and the second isolation circuit 703 are set, the isolation of coupler 701 can be further increased.
In other embodiments, the isolation of coupler can also be improved using more than two isolation circuits.
In other embodiments, there can also be the device generation of isolation features using other isolation circuits or isolator etc.
For above-mentioned isolation circuit.
In other embodiments, the structure of coupler circuit can also be other circuit structures, not introduce one by one here, and
Mode and structure that coupler realizes coupling are not limited.
The application is it is further proposed that a kind of communication device, as shown in figure 8, Fig. 8 is one embodiment of the application communication device
Structural schematic diagram.The present embodiment communication device 801 includes coupler 802, and the present embodiment coupler 802 can be such as Fig. 2 and Fig. 3
Shown in coupler 201, wherein coupler 201 include coupler circuit 202 and an at least isolation circuit 203, at least one every
From the isolated port 204 that circuit 203 is coupled in coupler circuit 202, isolation circuit 203 is anti-from isolated port 204 for being isolated
It is incident upon the radiofrequency signal of coupler circuit 202.
Optionally, isolation circuit 203 includes isolator 210, the input port 301 and coupler circuit 202 of isolator 210
Isolated port 204 couple, the output port 302 of isolator 210 with first load 211 couple.
In another communication device embodiment, coupler 802 can also be coupler 401 as shown in Figures 4 and 5,
In, coupler 401 and the difference of above-mentioned coupler 201 are: the isolation circuit 402 of the present embodiment coupler 401 includes annular
Device 403, the first port 501 of circulator 403 and the isolated port 405 of coupler circuit 404 couple, and the second of circulator 403
406 coupling of port 502 and the first load.
In another communication device embodiment, coupler 802 can be coupler 601 as shown in FIG. 6 again, wherein every
It further comprise the second load 603,603 coupling of the third port 503 of circulator 403 and the second load, so that ring from circuit 602
The energy transmission coefficient of the first port 501 of shape device 403 to second port 502 is greater than second port 502 to first port 501
Energy transmission coefficient.
Certainly, in other embodiments, coupler can also use the other structures of above-described embodiment, not repeat here.
It is different from the prior art, the embodiment of the present application coupler includes coupler circuit and an at least isolation circuit, wherein
At least one isolation circuit is coupled in the isolated port of coupler circuit, and isolation circuit reflexes to coupling for being isolated from isolated port
The radiofrequency signal of clutch circuit.In this way, it can be isolated by an at least isolation circuit from isolated port and reflex to coupling
The radiofrequency signal of clutch circuit, without being debugged to load or coupler circuit, to guarantee the other performance of coupler,
Accordingly, with respect to the prior art, the application can be improved the isolation of coupler.
The foregoing is merely presently filed embodiments, are not intended to limit the scope of the patents of the application, all to utilize this
Equivalent structure or equivalent flow shift made by application specification and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field similarly includes in the scope of patent protection of the application.
Claims (10)
1. a kind of coupler, which is characterized in that the coupler includes:
Coupler circuit；
An at least isolation circuit, an at least isolation circuit are coupled in the isolated port of the coupler circuit, the isolation
Circuit is for being isolated the radiofrequency signal for reflexing to the coupler circuit from the isolated port.
2. coupler according to claim 1, which is characterized in that the isolation circuit includes isolator, the isolator
Input port and the isolated port of the coupler circuit couple, the output port of the isolator and the first load coupled.
3. coupler according to claim 1, which is characterized in that the isolation circuit includes circulator, the circulator
First port and the isolated port of the coupler circuit couple, the second port of the circulator and the first load coupled.
4. coupler according to claim 3, which is characterized in that the isolation circuit further comprises the second load, institute
The third port and second load coupled for stating circulator, so that energy transmission of the first port to the second port
Coefficient is greater than the energy transmission coefficient of the second port to the first port.
5. coupler according to claim 1, which is characterized in that an at least isolation circuit includes the first isolation circuit
And second isolation circuit, first isolation circuit and second isolation circuit in a series arrangement with the coupler circuit
Isolated port coupling.
6. coupler according to claim 1, which is characterized in that the coupler circuit includes:
Main transmission line, it is defeated to the coupler circuit for being exported from the input port of the coupler circuit radiofrequency signal
Exit port；
Coupled transmission line couples setting with the main transmission line, to obtain coupled signal from the main transmission line, and by the coupling
Signal is closed to export to the coupling port of the coupler circuit and the isolated port.
7. a kind of communication device, which is characterized in that the communication device includes coupler, and the coupler includes:
Coupler circuit；
An at least isolation circuit, an at least isolation circuit are coupled in the isolated port of the coupler circuit, the isolation
Circuit is for being isolated the radiofrequency signal for reflexing to the coupler circuit from the isolated port.
8. communication device according to claim 7, which is characterized in that the isolation circuit includes isolator, the isolation
The isolated port of the input port of device and the coupler circuit couples, the output port of the isolator and the first load coupling
It connects.
9. communication device according to claim 7, which is characterized in that the isolation circuit includes circulator, the annular
The first port of device and the isolated port of the coupler circuit couple, the second port of the circulator and the first load coupling
It connects.
10. communication device according to claim 9, the isolation circuit further comprises the second load, the circulator
Third port and second load coupled so that the energy transmission coefficient of the first port to the second port is greater than
The second port to the first port energy transmission coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821654124.1U CN208970714U (en) | 2018-10-11 | 2018-10-11 | A kind of coupler and communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821654124.1U CN208970714U (en) | 2018-10-11 | 2018-10-11 | A kind of coupler and communication device |
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| Publication Number | Publication Date |
|---|---|
| CN208970714U true CN208970714U (en) | 2019-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821654124.1U Active CN208970714U (en) | 2018-10-11 | 2018-10-11 | A kind of coupler and communication device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111180847A (en) * | 2019-12-30 | 2020-05-19 | 深圳市大富科技股份有限公司 | Coupler, isolation circuit thereof and 5G communication system |
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2018
- 2018-10-11 CN CN201821654124.1U patent/CN208970714U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111180847A (en) * | 2019-12-30 | 2020-05-19 | 深圳市大富科技股份有限公司 | Coupler, isolation circuit thereof and 5G communication system |
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Address after: 233000 building 4, national financial incubation Industrial Park, 17 Yannan Road, high tech Zone, Bengbu City, Anhui Province Patentee after: Dafu Technology (Anhui) Co., Ltd Address before: 518104, Guangdong, Shenzhen province Baoan District manhole street, oyster Road, manhole Industrial Company Third Industrial Zone, A1, A2, A3 101, A4 first, second, third layers Patentee before: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd. |