CN211126001U - Coupler and coupling circuit and communication device thereof - Google Patents
Coupler and coupling circuit and communication device thereof Download PDFInfo
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- CN211126001U CN211126001U CN201922360181.XU CN201922360181U CN211126001U CN 211126001 U CN211126001 U CN 211126001U CN 201922360181 U CN201922360181 U CN 201922360181U CN 211126001 U CN211126001 U CN 211126001U
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- 230000008878 coupling Effects 0.000 title claims abstract description 255
- 238000010168 coupling process Methods 0.000 title claims abstract description 255
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 255
- 238000004891 communication Methods 0.000 title claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 49
- 238000002955 isolation Methods 0.000 claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims description 31
- 238000005070 sampling Methods 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
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- 229910052802 copper Inorganic materials 0.000 description 2
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Abstract
The application discloses a coupler, a coupling circuit of the coupler and a communication device of the coupler. The coupling circuit includes: the device comprises a coupling line, a first adjusting piece, a second adjusting piece, a first coupling port and a second coupling port, wherein the coupling line is coupled with a main transmission line; the coupling line is used for acquiring a first coupling signal and a second coupling signal which are opposite in transmission direction from the main transmission line, transmitting the first coupling signal to the first coupling port and transmitting the second coupling signal to the second coupling port; the first adjusting piece is used for adjusting the isolation degree of the second coupling port; the second adjusting piece is used for adjusting the isolation degree of the first coupling port. By the mode, the transmission power and the reflected power can be sampled by only one coupler, and the sampling circuit is small in size and high in consistency.
Description
Technical Field
The present application relates to the field of radio frequency technologies, and in particular, to a coupler, a coupling circuit thereof, and a communication device.
Background
In radio frequency communication devices, couplers are often used, which are used to couple out radio frequency signals with a certain degree of coupling for individual observation or testing, and which can be used in various radio frequency circuits.
The inventor of the application finds that the traditional coupler can only collect or monitor the transmitting power or the reflected power, and two couplers are needed to collect the transmitting power and the reflected power, so that the whole sampling circuit has the problems of large volume, complex structure, high processing technology difficulty, poor consistency and the like.
Disclosure of Invention
The technical problem that this application mainly solved is how to realize only needing a coupler can be to the sampling of transmitted power and reflected power, and sampling circuit volume is less, and the uniformity is higher.
In order to solve the technical problem, the application adopts a technical scheme that: a coupling circuit is provided. The coupling circuit includes: the coupling line is coupled with the main transmission line, one end of the first adjusting piece is connected with one end of the coupling line, the other end of the first adjusting piece is connected with the first coupling port, one end of the second adjusting piece is connected with the other end of the coupling line, and the other end of the second adjusting piece is connected with the second coupling port; the coupling line is used for acquiring a first coupling signal and a second coupling signal from the main transmission line, transmitting the first coupling signal to the first coupling port and transmitting the second coupling signal to the second coupling port; the first adjusting piece is used for adjusting the isolation degree of the second coupling port; the second adjusting piece is used for adjusting the isolation degree of the first coupling port; wherein the transmission direction of the first coupled signal is opposite to the transmission direction of the second coupled signal; wherein, the coupling line is a microstrip line.
The coupling circuit comprises a first potentiometer and a second potentiometer, wherein one end of the first potentiometer is connected with the first adjusting piece, and the other end of the first potentiometer is connected with the first coupling port and used for adjusting the coupling degree of the first coupling port; and one end of the second potentiometer is connected with the second adjusting piece, and the other end of the second potentiometer is connected with the second coupling port and used for adjusting the coupling degree of the second coupling port.
The first adjusting piece and the second adjusting piece are adjustable microstrip lines.
Wherein the coupling circuit further comprises: one end of the first resistor is connected with the first adjusting piece, and the other end of the first resistor is grounded; and one end of the second resistor is connected with the second adjusting piece, and the other end of the second resistor is grounded.
Wherein the coupling circuit further comprises: one end of the first inductor is connected with one end of the coupling line, the other end of the first inductor is connected with the first adjusting piece, one end of the first capacitor is connected with one end of the first inductor, and the other end of the first capacitor is grounded; one end of the second inductor is connected with the other end of the coupling line, the other end of the second inductor is connected with the second adjusting piece, one end of the second capacitor is connected with one end of the second inductor, and the other end of the second capacitor is grounded.
Wherein the coupling circuit further comprises: one end of the third resistor is connected with the first coupling port, the other end of the third resistor is grounded, one end of the third capacitor is connected with the first coupling port, and the other end of the third capacitor is grounded; one end of the fourth resistor is connected with the second coupling port, the other end of the fourth resistor is grounded, one end of the fourth capacitor is connected with the second coupling port, and the other end of the fourth capacitor is grounded.
Wherein the coupling circuit further comprises: and the two gain adjusting circuits are respectively coupled with the first coupling port and the second coupling port.
In order to solve the above technical problem, another technical solution adopted by the present application is: a coupler is provided. The coupler includes: an input port and an output port; one end of the main transmission line is connected with the input port, the other end of the main transmission line is connected with the output port, and the main transmission line is used for outputting the radio-frequency signal from the input port to the output port; the coupling circuit is configured to obtain a first coupling signal and a second coupling signal from the main transmission line, output the first coupling signal to the first coupling port, and transmit the second coupling signal to the second coupling port.
Wherein the coupler further comprises: the circuit board, coupling circuit sets up on the circuit board.
In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided a communication device comprising the coupler described above.
The beneficial effect of this application is: different from the prior art, the coupling circuit of the embodiment of the application comprises: the coupling line is coupled with the main transmission line, one end of the first adjusting piece is connected with one end of the coupling line, the other end of the first adjusting piece is connected with the first coupling port, one end of the second adjusting piece is connected with the other end of the coupling line, and the other end of the second adjusting piece is connected with the second coupling port; the coupling line is used for acquiring a first coupling signal and a second coupling signal from the main transmission line, transmitting the first coupling signal to the first coupling port and transmitting the second coupling signal to the second coupling port; the first adjusting piece is used for adjusting the isolation degree of the second coupling port; the second adjusting piece is used for adjusting the isolation degree of the first coupling port; wherein the transmission direction of the first coupled signal is opposite to the transmission direction of the second coupled signal; wherein, the coupling line is a microstrip line. By the mode, the coupling circuit in the embodiment of the application can realize respective coupling of signals with opposite transmission directions on the main transmission line so as to respectively obtain the first coupling signal and the second coupling signal, the isolation degree of the second coupling port is adjusted by the first adjusting piece so as to ensure that the first coupling signal is transmitted to the first coupling port in a one-way mode, and the isolation degree of the first coupling port is adjusted by the second adjusting piece so as to ensure that the second coupling signal is transmitted to the second coupling port in a one-way mode. Therefore, the coupling circuit of the embodiment of the application can realize the sampling of the transmitting power and the reflected power by only adopting one coupler; and two couplers are not needed to be adopted to respectively realize the sampling of the transmitting power and the reflected power, the sampling circuit has small volume, the processing technology is simple, and the consistency of the coupled signals is high.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a coupler according to the present application;
FIG. 2 is a schematic circuit diagram of an embodiment of a coupling circuit of the present application;
FIG. 3 is a schematic diagram of a circuit board structure of the coupling circuit of the embodiment of FIG. 2;
fig. 4 is a schematic structural diagram of an embodiment of a communication device according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first" and "second" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
In a communication system, there is a need to monitor the transmitted power and the reflected power. The coupler is a device with directional transmission characteristic, and the essence of the coupler is to distribute power of microwave signals according to a certain proportion. The traditional coupler can divide power from the forward wave of a main transmission line according to a certain proportion, cannot divide power from the reverse wave, and can be used for isolating, separating and mixing signals to sample power signals. One end of the traditional coupler is a coupling output end, the other end of the traditional coupler is an isolation end, signals in one direction can be coupled only, if the transmitting power and the reflected power need to be sampled simultaneously, the signals can be achieved only by using two couplers, the occupied space is large, the isolation between the two couplers is difficult to process, and the consistency of the signals is poor.
To solve the above problem, the present application first proposes a coupler, as shown in fig. 1, where fig. 1 is a schematic structural diagram of an embodiment of the coupler of the present application. The coupler 101 of the present embodiment includes: the radio frequency amplifier comprises an input port 104, an output port 105, a main transmission line 102 and a coupling circuit 110, wherein one end of the main transmission line 102 is connected with the input port 104, the other end of the main transmission line 102 is connected with the output port 105, and the main transmission line 102 is used for outputting a radio frequency signal from the input port 104 to the output port 105; the coupling circuit 110 is configured to obtain the first coupling signal and the second coupling signal from the main transmission line 102, output the first coupling signal to the first coupling port 106, and transmit the second coupling signal to the second coupling port 107.
During the transmission of radio frequency signals, reflected power is usually generated, and it is usually necessary to sample the reflected power in order to improve the stability of the communication system. In the coupler 101 of the present embodiment, the coupling circuit 110 is provided with a first coupling port 106 and a second coupling port 107, which can respectively couple and output the transmission power and the reflected power, so as to simultaneously sample the transmission power and the reflected power.
The coupler 101 of the present embodiment further includes: a circuit board (not shown) on which the coupling circuit 110 is disposed.
The present application further provides a coupling circuit for a coupler, as shown in fig. 2 and fig. 3, fig. 2 is a schematic circuit structure diagram of an embodiment of the coupling circuit of the present application; fig. 3 is a schematic diagram of a circuit board structure of the coupling circuit of the embodiment of fig. 2. The coupling circuit 110 of the present embodiment can be used for the coupler 101, and the coupling circuit 110 of the present embodiment includes: the coupling line 111 is coupled with the main transmission line 102, one end of the first adjusting piece 112 is connected with one end of the coupling line 111, the other end of the first adjusting piece 112 is connected with the first coupling port 106, one end of the second adjusting piece 113 is connected with the other end of the coupling line 111, and the other end of the second adjusting piece 113 is connected with the second coupling port 107; the coupling line 111 is used for acquiring a first coupling signal and a second coupling signal from the main transmission line 102, and for transmitting the first coupling signal to the first coupling port 106 and the second coupling signal to the second coupling port 107; the first adjusting member 112 is used for adjusting the isolation of the second coupling port 107; the second adjusting member 113 is used for adjusting the isolation of the first coupling port 106, wherein the transmission direction of the first coupling signal is opposite to the transmission direction of the second coupling signal.
Different from the prior art, the coupling circuit 110 of the present embodiment can respectively couple signals with opposite transmission directions on the main transmission line 102 to obtain a first coupling signal and a second coupling signal, and adjust the isolation of the second coupling port 107 through the first adjusting element 112 to ensure that the first coupling signal is unidirectionally transmitted to the first coupling port 106, and adjust the isolation of the first coupling port 106 through the second adjusting element 113 to ensure that the second coupling signal is unidirectionally transmitted to the second coupling port 107. Therefore, the coupling circuit 110 of the present embodiment can realize the sampling of the transmission power and the reflected power by using only one coupler; and two couplers are not needed to be adopted to respectively realize the sampling of the transmitting power and the reflected power, the sampling circuit has small volume, the processing technology is simple, and the consistency of the coupled signals is high.
The coupling line 111 of the present embodiment is a microstrip line. In other embodiments, coaxial lines, rectangular waveguides, or striplines, etc. may also be used instead of microstrip lines.
The first adjusting element 112 and the second adjusting element 113 of this embodiment are adjustable microstrip lines, and the impedance from the coupling line 111 to the first coupling port 106 can be adjusted by adjusting the impedance of the first adjusting element 112, so that the impedance from the coupling line 111 to the first coupling port 106 satisfies impedance matching, and thus the second coupling port 107 does not have signal reflection; the impedance of the coupling line 111 to the second coupling port 107 can be adjusted by adjusting the impedance of the second adjusting element 113, so that the impedance of the coupling line 111 to the second coupling port 107 satisfies the impedance matching, and thus the first coupling port 106 does not reflect the signal.
The microstrip line can be realized by arranging the copper plating layer on the circuit board, and the impedance of the microstrip line can be adjusted by adjusting the width, the length, the thickness and the like of the copper plating layer.
In other embodiments, a variable resistor or the like may be used instead of the adjustable microstrip line.
Optionally, the coupling circuit 110 of the present embodiment further includes a first potentiometer RV1 and a second potentiometer RV2, wherein one end of the first potentiometer RV1 is connected to the first adjusting element 112, and the other end of the first potentiometer RV1 is connected to the first coupling port 106, so as to adjust the coupling degree of the first coupling port 106; one end of the second potentiometer RV2 is connected to the second adjusting element 113, and the other end of the second potentiometer RV2 is connected to the second coupling port 107, so as to adjust the coupling degree of the second coupling port 107.
Wherein, the strength of the first coupling signal output from the first coupling port 106, that is, the coupling degree of the first coupling port 106, can be adjusted by adjusting the impedance of the first potentiometer RV 1; the strength of the second coupling signal output from the second coupling port 107, that is, the coupling degree of the second coupling port 107 can be adjusted by adjusting the impedance of the second potentiometer RV 2.
Optionally, the coupling circuit 110 of the present embodiment further includes: a first resistor R1 and a second resistor R2, wherein one end of the first resistor R1 is connected with the first adjusting piece 112, and the other end of the first resistor R1 is grounded; one end of the second resistor R2 is connected to the second regulator 113, and the other end of the second resistor R2 is grounded.
The embodiment realizes the grounding of the first adjusting part 112 (microstrip line) through the first resistor R1 to improve the quality of the first coupling signal; the second regulator 113 (microstrip line) is grounded through the second resistor R2 to improve the quality of the second coupled signal.
Optionally, the coupling circuit 110 of this embodiment further includes a first inductor L1, a first capacitor C1, a second inductor L2, and a second capacitor C2, wherein one end of the first inductor L1 is connected to one end of the coupling line 111, the other end of the first inductor L1 is connected to the first adjusting element 112, one end of the first capacitor C1 is connected to one end of the first inductor L1, and the other end of the first capacitor C1 is grounded, one end of the second inductor L2 is connected to the other end of the coupling line 111, the other end of the second inductor L2 is connected to the second adjusting element 113, one end of the second capacitor C2 is connected to one end of the second inductor L2, and the other end of the second capacitor C2 is grounded.
The first inductor L1 and the first capacitor C1 of the present embodiment can filter the first coupling signal to improve the quality of the first coupling signal, and the second inductor L2 and the second capacitor C2 can filter the second coupling signal to improve the quality of the second coupling signal.
Optionally, the coupling circuit 110 of the present embodiment further includes: one end of a third resistor R3 is connected with the first coupling port 106, the other end of the third resistor R3 is grounded, one end of a third capacitor C3 is connected with the first coupling port 106, and the other end of the third capacitor C3 is grounded; one end of the fourth resistor R4 is connected to the second coupling port 107, the other end of the fourth resistor R4 is grounded, one end of the fourth capacitor C4 is connected to the second coupling port 107, and the other end of the fourth capacitor C4 is grounded.
The third resistor R3 and the third capacitor C3 of the present embodiment can filter the first coupled signal to improve the quality of the first coupled signal; the fourth resistor R4 and the fourth capacitor C4 can filter the second coupled signal to improve the quality of the second coupled signal.
Optionally, the coupling circuit 110 may further include two gain adjustment circuits (not shown) coupled to the first coupling port 106 and the second coupling port 107, respectively, to adjust the first coupling signal and the second coupling signal, respectively, so as to increase the coupling bandwidth of the coupler 101.
The present application further provides a communication device, as shown in fig. 4, fig. 4 is a schematic structural diagram of an embodiment of the communication device of the present application. The communication device 2401 of this embodiment includes a coupler 2402, where the coupler 2402 is the coupler described in the above embodiments, which is not described herein again.
Different from the prior art, the coupling circuit of the embodiment of the application comprises: the coupling line is coupled with the main transmission line, one end of the first adjusting piece is connected with one end of the coupling line, the other end of the first adjusting piece is connected with the first coupling port, one end of the second adjusting piece is connected with the other end of the coupling line, and the other end of the second adjusting piece is connected with the second coupling port; the coupling line is used for acquiring a first coupling signal and a second coupling signal from the main transmission line, transmitting the first coupling signal to the first coupling port and transmitting the second coupling signal to the second coupling port; the first adjusting piece is used for adjusting the isolation degree of the second coupling port; the second adjusting piece is used for adjusting the isolation degree of the first coupling port; wherein the transmission direction of the first coupled signal is opposite to the transmission direction of the second coupled signal; wherein, the coupling line is a microstrip line. By the mode, the coupling circuit in the embodiment of the application can realize respective coupling of signals with opposite transmission directions on the main transmission line so as to respectively obtain the first coupling signal and the second coupling signal, the isolation degree of the second coupling port is adjusted by the first adjusting piece so as to ensure that the first coupling signal is transmitted to the first coupling port in a one-way mode, and the isolation degree of the first coupling port is adjusted by the second adjusting piece so as to ensure that the second coupling signal is transmitted to the second coupling port in a one-way mode. Therefore, the coupling circuit of the embodiment of the application can realize the sampling of the transmitting power and the reflected power by only adopting one coupler; and two couplers are not needed to be adopted to respectively realize the sampling of the transmitting power and the reflected power, the sampling circuit has small volume, the processing technology is simple, and the consistency of the coupled signals is high.
Furthermore, the output power of the coupling signal of the coupler can be adjusted, and the isolation of the coupling port can be adjusted; the coupler has the advantages of easy realization of various performance indexes, small volume, simple structure design, simple processing technology and simple assembly technology, reduces the production cost, improves the production benefit, is convenient for loading and transportation, is beneficial to the integrated design of a communication device, and has more competitiveness.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A coupling circuit, characterized in that the coupling circuit comprises: the coupling line is coupled with a main transmission line, one end of the first adjusting piece is connected with one end of the coupling line, the other end of the first adjusting piece is connected with the first coupling port, one end of the second adjusting piece is connected with the other end of the coupling line, and the other end of the second adjusting piece is connected with the second coupling port;
the coupling line is used for acquiring a first coupling signal and a second coupling signal from the main transmission line, transmitting the first coupling signal to the first coupling port and transmitting the second coupling signal to the second coupling port; the first adjusting piece is used for adjusting the isolation degree of the second coupling port; the second adjusting piece is used for adjusting the isolation degree of the first coupling port;
wherein a transmission direction of the first coupled signal is opposite to a transmission direction of the second coupled signal;
wherein, the coupling line is a microstrip line.
2. The coupling circuit of claim 1, wherein the coupling circuit further comprises:
one end of the first potentiometer is connected with the first adjusting piece, and the other end of the first potentiometer is connected with the first coupling port and is used for adjusting the coupling degree of the first coupling port;
and one end of the second potentiometer is connected with the second adjusting piece, and the other end of the second potentiometer is connected with the second coupling port and is used for adjusting the coupling degree of the second coupling port.
3. The coupling circuit of claim 1, wherein the first and second adjusters are adjustable microstrip lines.
4. The coupling circuit of claim 1, wherein the coupling circuit further comprises:
one end of the first resistor is connected with the first adjusting piece, and the other end of the first resistor is grounded;
and one end of the second resistor is connected with the second adjusting piece, and the other end of the second resistor is grounded.
5. The coupling circuit of claim 1, wherein the coupling circuit further comprises:
one end of the first inductor is connected with one end of the coupling line, the other end of the first inductor is connected with the first adjusting piece, one end of the first capacitor is connected with one end of the first inductor, and the other end of the first capacitor is grounded;
the inductor comprises a first inductor and a first capacitor, wherein one end of the first inductor is connected with the other end of the coupling line, the other end of the first inductor is connected with the first adjusting piece, one end of the first capacitor is connected with one end of the first inductor, and the other end of the first capacitor is grounded.
6. The coupling circuit of claim 1, wherein the coupling circuit further comprises:
one end of the third resistor is connected with the first coupling port, the other end of the third resistor is grounded, one end of the third capacitor is connected with the first coupling port, and the other end of the third capacitor is grounded;
one end of the fourth resistor is connected with the second coupling port, the other end of the fourth resistor is grounded, one end of the fourth capacitor is connected with the second coupling port, and the other end of the fourth capacitor is grounded.
7. The coupling circuit of claim 1, wherein the coupling circuit further comprises: two gain adjustment circuits respectively coupled to the first coupling port and the second coupling port.
8. A coupler, characterized in that the coupler comprises:
an input port and an output port;
one end of the main transmission line is connected with the input port, the other end of the main transmission line is connected with the output port, and the main transmission line is used for outputting radio-frequency signals from the input port to the output port;
the coupling circuit of any of claims 1 to 7, configured to take the first coupled signal and the second coupled signal from the main transmission line, and output the first coupled signal to the first coupled port, and transmit the second coupled signal to the second coupled port.
9. The coupler of claim 8, wherein the coupler further comprises: a circuit board on which the coupling circuit is disposed.
10. A communication device, characterized in that it comprises a coupler according to any of claims 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922360181.XU CN211126001U (en) | 2019-12-24 | 2019-12-24 | Coupler and coupling circuit and communication device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922360181.XU CN211126001U (en) | 2019-12-24 | 2019-12-24 | Coupler and coupling circuit and communication device thereof |
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| CN211126001U true CN211126001U (en) | 2020-07-28 |
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| CN201922360181.XU Active CN211126001U (en) | 2019-12-24 | 2019-12-24 | Coupler and coupling circuit and communication device thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113036384A (en) * | 2019-12-24 | 2021-06-25 | 深圳市大富科技股份有限公司 | Coupler and coupling circuit and communication device thereof |
| CN113363693A (en) * | 2021-05-17 | 2021-09-07 | 大富科技(安徽)股份有限公司 | Coupler and coupling circuit and communication device thereof |
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2019
- 2019-12-24 CN CN201922360181.XU patent/CN211126001U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113036384A (en) * | 2019-12-24 | 2021-06-25 | 深圳市大富科技股份有限公司 | Coupler and coupling circuit and communication device thereof |
| CN113036384B (en) * | 2019-12-24 | 2025-04-25 | 大富科技(安徽)股份有限公司 | Coupler, coupling circuit and communication device thereof |
| CN113363693A (en) * | 2021-05-17 | 2021-09-07 | 大富科技(安徽)股份有限公司 | Coupler and coupling circuit and communication device thereof |
| CN113363693B (en) * | 2021-05-17 | 2022-06-24 | 大富科技(安徽)股份有限公司 | Coupler and coupling circuit and communication device thereof |
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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 First, Second and Third Floors of A1, A2, A3 101, A4 of Shajing Street, Shajing Street, Baoan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd. |