CN113036383A - Signal coupling circuit, coupler circuit and coupler - Google Patents
Signal coupling circuit, coupler circuit and coupler Download PDFInfo
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- CN113036383A CN113036383A CN201911344635.2A CN201911344635A CN113036383A CN 113036383 A CN113036383 A CN 113036383A CN 201911344635 A CN201911344635 A CN 201911344635A CN 113036383 A CN113036383 A CN 113036383A
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- 230000008878 coupling Effects 0.000 title claims abstract description 95
- 238000010168 coupling process Methods 0.000 title claims abstract description 95
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 95
- 238000002955 isolation Methods 0.000 claims abstract description 59
- 239000003990 capacitor Substances 0.000 claims description 37
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 230000003071 parasitic effect Effects 0.000 description 22
- 238000010586 diagram Methods 0.000 description 12
- 238000004891 communication Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
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Abstract
The application discloses signal coupling circuit, coupler circuit and coupler, this signal coupling circuit includes: a signal coupling element; a signal output circuit connected to the first end of the signal coupling element; the signal isolation circuit is connected with the second end of the signal coupling element; wherein, signal isolation circuit includes: the potentiometer comprises a grounding end and an adjusting end, wherein the grounding end is grounded; one end of the at least one patch resistor is connected with the adjusting end of the potentiometer, and one end of the at least one patch resistor is connected with the second end of the signal coupling element. This application sets up the chip resistor through adjusting between the end of potentiometre and signal coupling element's second end, can obviously reduce the regulation sensitivity of potentiometre, improves the degree of accuracy of adjusting to the isolation of coupler.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a signal coupling circuit, a coupler circuit, and a coupler.
Background
In a microwave system, one path of microwave power is often divided into several paths in proportion, which is a power distribution problem, and a coupler can realize the function. In particular, in radio frequency communication, couplers are widely used in various radio frequency circuits because the couplers can be used to couple out radio frequency signals with a certain degree of coupling and perform individual observation or test.
The existing coupler includes a coupling portion, a main signal input, an output, a coupled signal output, and an isolation terminal, where the isolation terminal includes an isolation circuit for isolating the radio frequency signal reflected from the isolation port to the coupled signal output port. Since the isolation degree of the coupler changes with the change of the load of the isolation circuit arranged on the isolation port, the isolation circuit of the coupler can be adjusted by adjusting the load of the isolation circuit, namely, the isolation degree of the coupler can be adjusted by adjusting a potentiometer in the isolation circuit.
In the prior art, when the potentiometer is adjusted, the parasitic capacitance, parasitic inductance and frequency response characteristics of the potentiometer can cause that the debugging of the potentiometer is very sensitive, and even if the potentiometer is subjected to fine adjustment, the isolation of the coupler can be greatly changed, so that the problem of low isolation adjustment precision of the coupler is caused.
Disclosure of Invention
The technical problem that this application mainly solved provides a signal coupling circuit, coupler circuit and coupler, can solve among the prior art because of the inaccurate problem of isolation regulation that potentiometre debugging is sensitive leads to.
In order to solve the above technical problem, one technical solution adopted by the present application is to provide a signal coupling circuit, which is characterized by comprising: a signal coupling element; a signal output circuit connected to the first end of the signal coupling element; the signal isolation circuit is connected with the second end of the signal coupling element; wherein, signal isolation circuit includes: the potentiometer comprises a grounding end and an adjusting end, wherein the grounding end is grounded; one end of the at least one patch resistor is connected with the adjusting end of the potentiometer, and one end of the at least one patch resistor is connected with the second end of the signal coupling element.
Further, the isolation circuit comprises a plurality of chip resistors, and the plurality of chip resistors are arranged between the potentiometer and the second end of the coupling microstrip in series.
Further, the isolation circuit comprises a plurality of chip resistors, and the plurality of chip resistors are arranged between the potentiometer and the second end of the coupling microstrip in parallel.
Further, the resistance value of the chip resistor is 0-70 omega.
Furthermore, the signal coupling element is a coupling sheet or a microstrip line.
Further, the signal output circuit includes: the circuit comprises a first capacitor, a rheostat, a resistor, a second capacitor, a third capacitor, a fourth capacitor and a signal output end; the first end of the first capacitor is in signal connection with the first end of the signal coupling element, and the second end of the first capacitor is grounded; the adjustable end of the rheostat is in signal connection with the first end of the signal coupling element, the first end of the rheostat is in signal connection with the first end of the resistor, and the second end of the resistor is grounded; the first end of the second capacitor is in signal connection with the first end of the rheostat, and the second end of the second capacitor is in signal connection with the signal output end, the first end of the third capacitor and the first end of the fourth capacitor; the second end of the third capacitor is grounded, and the second end of the fourth capacitor is grounded.
In order to solve the above technical problem, the present application further provides a coupler circuit, where the coupler circuit includes a main signal circuit and a signal coupling circuit, and the signal coupling circuit includes: the signal coupling element is coupled with the main signal circuit; a signal output circuit connected to the first end of the signal coupling element; the signal isolation circuit is connected with the second end of the signal coupling element; wherein, signal isolation circuit includes: the potentiometer comprises a grounding end and an adjusting end, wherein the grounding end is grounded; one end of the at least one patch resistor is connected with the adjusting end of the potentiometer, and one end of the at least one patch resistor is connected with the second end of the signal coupling element.
Further, the signal isolation circuit comprises a plurality of chip resistors, and the plurality of chip resistors are arranged between the potentiometer and the second end of the signal coupling element in series.
Further, the signal isolation circuit comprises a plurality of chip resistors, and the plurality of chip resistors are arranged between the potentiometer and the second end of the signal coupling element in parallel.
Further, the resistance value of the chip resistor is 0-70 omega.
To solve the above technical problem, the present application further provides a coupler including the above coupler circuit.
Through the signal coupling circuit, the coupler circuit and the coupler provided by the application, at least the following beneficial effects are achieved:
in this application, set up the chip resistor between the regulation end of the potentiometre of signal coupling circuit and the second end with signal coupling element, because parasitic capacitance and parasitic inductance of chip resistor are less than parasitic capacitance and parasitic inductance in the potentiometre, the frequency response range of chip resistor is wide in the frequency response range in the potentiometre, consequently can reduce the regulation sensitivity of potentiometre, improves the accuracy of the isolation regulation to the coupler.
Drawings
FIG. 1 is a schematic diagram of a signal coupling circuit of the present application;
FIG. 2 is a circuit diagram of a first embodiment of the signal isolation circuit of FIG. 1 of the present application;
FIG. 3 is a circuit diagram of a second embodiment of the signal isolation circuit of FIG. 1 of the present application;
FIG. 4 is a circuit diagram of a third embodiment of the signal isolation circuit of FIG. 1 of the present application;
FIG. 5 is a circuit diagram of one embodiment of the signal output circuit of FIG. 1 of the present application;
fig. 6 is a schematic diagram of a coupler circuit of 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.
Referring to fig. 1, a circuit diagram of a signal coupling circuit 10 is provided. Wherein the signal coupling circuit 10 is applied to a coupler.
Wherein, this signal isolation circuit 11 includes: the potentiometer comprises a grounding end and an adjusting end (not shown in the figures), wherein the grounding end is grounded;
one end of the at least one patch resistor is connected with the adjusting end of the potentiometer, and the other end of the at least one patch resistor is connected with the second end of the signal coupling element.
Fig. 2 is a circuit diagram of a first embodiment of the signal isolation circuit of fig. 1 according to the present application. As shown, the at least one chip resistor may be a chip resistor 121, one end of the chip resistor 121 is coupled to the adjustment end of the potentiometer 111, and the other end a of the chip resistor 121 is connected to the second end of the signal coupling element.
The chip resistor 121 may be a chip fixed resistor, and the frequency response range of the chip resistor 12 is large. The parasitic capacitance and the parasitic inductance of the chip resistor 121 are both smaller than those of the potentiometer 11, the frequency response range of the chip resistor 121 is wider than that of the potentiometer 11, and the circuit space cost can be greatly saved.
The resistance of the chip resistor 12 is 0 Ω to 70 Ω, and specifically, the resistance of the chip resistor 12 may be 0 Ω, 5 Ω, 12 Ω, 23 Ω, 32 Ω, 44 Ω, 57 Ω, 66 Ω or 70 Ω.
Compared with the prior art, the parasitic capacitance and the parasitic inductance of the chip resistor 121 are smaller than those of the potentiometer 111, the frequency response range of the chip resistor 121 is wider than that of the potentiometer 111, and then the influence of the parasitic capacitance, the parasitic inductance and the frequency response characteristic on the potentiometer 111 is reduced, so that the adjustment sensitivity of the potentiometer 111 can be reduced, and the accuracy of the isolation adjustment of the coupler is improved.
Referring to fig. 3, fig. 3 is a circuit diagram of a second embodiment of the signal isolation circuit of fig. 1 according to the present application.
In this embodiment, the plurality of chip resistors may specifically include the chip resistor 121 to the chip resistor 12n, where n is an integer greater than 1. The plurality of chip resistors are connected in sequence to realize series connection. That is, the signal isolation circuit includes a plurality of chip resistors 121 to 12n, and the plurality of chip resistors 121 to 12n are connected in series, wherein one end of the chip resistor 121 is connected to one end of the potentiometer, and one end a of the chip resistor 12n is connected to the second end of the signal coupling element.
The total resistance of the plurality of chip resistors may be 0 Ω to 70 Ω, and specifically, the total resistance of the plurality of chip resistors may be 0 Ω, 1 Ω, 10 Ω, 30 Ω, 56 Ω, or 70 Ω.
The signal coupling circuit of the embodiment includes a plurality of chip resistors, and the plurality of chip resistors are serially connected between the adjustment end of the potentiometer 111 and the second port of the signal coupling element, wherein parasitic capacitances and parasitic inductances of the plurality of chip resistors are smaller than those of the potentiometer 111, and a frequency response range of the plurality of chip resistors is wider than a frequency response range of the potentiometer 111, so that influence of the parasitic capacitances, parasitic inductances and frequency response characteristics on the potentiometer 111 is reduced. Therefore, compared with the prior art, the adjustment sensitivity of the potentiometer 111 can be reduced, and the accuracy of the isolation adjustment of the coupler can be improved.
Referring to fig. 4, fig. 4 is a circuit diagram of a third embodiment of the signal isolation circuit of fig. 1 according to the present application;
the signal isolation circuit 10 according to the third embodiment of the present application is different from the signal isolation circuit 10 according to the second embodiment in that: a plurality of chip resistors are arranged in parallel between the adjustment terminal of the potentiometer 111 and the second terminal of the signal coupling element.
The plurality of chip resistors may specifically include a chip resistor 121 and a chip resistor 12n, where n is an integer greater than 1. The plurality of chip resistors are connected in parallel, that is, one ends of the chip resistors 121 and 12n are both connected with the adjusting end of the potentiometer 11, and the other ends a of the chip resistors 121 and 12n are both connected with the second end of the signal coupling element.
The total resistance of the plurality of chip resistors may be 0 Ω to 70 Ω, and specifically, the total resistance of the plurality of chip resistors may be 0 Ω, 1 Ω, 10 Ω, 20 Ω, 30 Ω, 56 Ω, or 70 Ω.
The signal coupling circuit of the embodiment includes a plurality of chip resistors, the plurality of chip resistors are arranged in parallel between the adjusting end of the potentiometer 111 and the second end of the signal coupling element 12, wherein parasitic capacitance and parasitic inductance of the plurality of chip resistors are smaller than those of the potentiometer 111, and a frequency response range of the plurality of chip resistors is wider than a frequency response range of the potentiometer 111, so that influence of the parasitic capacitance, parasitic inductance and frequency response characteristics on the potentiometer 111 is reduced, thereby reducing adjustment sensitivity of the potentiometer 111 and improving accuracy of isolation adjustment on the coupler. Compared with the signal coupling circuit 10 of the first embodiment, the present embodiment can select the chip resistors with larger resistance value difference to be connected in parallel, which is convenient for flexible design of the circuit.
Please refer to fig. 5, which is a circuit diagram of an embodiment of the signal output circuit 13 of fig. 1 according to the present application.
The signal output circuit 13 may be the signal output circuit 13 disclosed in the signal coupling circuit 10. Wherein the signal output circuit 13 includes: a first capacitor 23, a varistor 24, a resistor 25, a second capacitor 26, a third capacitor 27 and a fourth capacitor 28.
Wherein, one end 22 of the first capacitor 23 is connected to the first end of the signal coupling element, one end of the first capacitor 23 is further connected to the adjustable end of the varistor 24, and the other end of the first capacitor 23 is grounded. One end of the varistor 24 is connected with one end of the resistor 25 and one end of the second capacitor 26, and the other end of the resistor 25 is grounded; the other end of the second capacitor 26 is connected with the output end 29 of the signal output circuit 13, one end of the third capacitor 27 and one end of the fourth capacitor 28; the other terminal of the third capacitor 27 is connected to ground and the other terminal of the fourth capacitor 28 is connected to ground.
The signal coupling element 12 may be a coupling patch or a microstrip line, and preferably, in this embodiment, the signal coupling element 12 is a microstrip line.
Fig. 6 is a schematic diagram of a coupler circuit 60 according to the present application, and is referred to as a coupler circuit 60 according to the present application.
Wherein, coupler circuit 60 includes main signal circuit 61 and signal coupling circuit 62, and signal coupling circuit 60 includes: a signal coupling element; a signal output circuit connected to the first end of the signal coupling element; and the signal isolation circuit is connected with the second end of the signal coupling element. The signal coupling element is coupled to the main signal circuit in the region B, that is, the signal coupling element is coupled to the main signal circuit between the input terminal of the main signal circuit and the output terminal of the main signal circuit.
As shown in fig. 6, the main signal circuit 61 includes a main signal input terminal J2, a main signal output terminal J1, and the signal coupling circuit includes a signal output terminal J3 and a signal isolation terminal J1, wherein the signal output terminal J3 includes a signal output circuit, and the signal isolation terminal J1 includes a signal isolation circuit.
Wherein, signal isolation circuit includes: the potentiometer comprises a grounding end and an adjusting end, wherein the grounding end is grounded; one end of the at least one patch resistor is connected with the adjusting end of the potentiometer, and one end of the at least one patch resistor is connected with the second end of the signal coupling element.
The signal isolation circuit comprises a plurality of chip resistors, and the plurality of chip resistors are arranged between the potentiometer and the second end of the signal coupling element in series.
The signal isolation circuit comprises a plurality of patch resistors, and the plurality of patch resistors are arranged between the potentiometer and the second end of the signal coupling element in parallel.
The resistance value of the patch resistor is 0-70 omega.
Preferably, in this embodiment, the signal output circuit included in the signal output terminal J3 is the signal output circuit 13, and the signal isolation circuit included in the signal isolation terminal J1 is the signal isolation circuit 11, so that the description thereof is omitted here.
The present application also provides a coupler comprising the coupler circuit disclosed in the above embodiments.
In summary, in the present application, the patch resistor is disposed between the potentiometer adjustment end of the signal isolation circuit in the signal coupling circuit and the second end of the signal coupling element, and because the parasitic capacitance and the parasitic inductance of the patch resistor are smaller than those of the potentiometer, and the frequency response range of the patch resistor is wider than that of the potentiometer, the adjustment sensitivity of the potentiometer can be reduced, and the accuracy of the isolation adjustment of the coupler can be improved.
It should be noted that the above are only embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent structures or equivalent flow transformations made by using the contents of the specification and the drawings, or applied directly or indirectly to other related technical fields are included in the scope of the present application.
Claims (10)
1. A signal coupling circuit, the signal coupling circuit comprising:
a signal coupling element;
a signal output circuit connected to a first end of the signal coupling element;
a signal isolation circuit connected to a second end of the signal coupling element;
wherein the signal isolation circuit comprises:
the potentiometer comprises a grounding end and an adjusting end, wherein the grounding end is grounded;
one end of at least one patch resistor is connected with the adjusting end of the potentiometer, and the other end of at least one patch resistor is connected with the second end of the signal coupling element.
2. The signal coupling circuit of claim 1,
the isolation circuit comprises a plurality of the patch resistors, and the plurality of the patch resistors are arranged between the potentiometer and the second end of the coupling microstrip in series.
3. The signal coupling circuit of claim 1,
the isolation circuit comprises a plurality of the patch resistors, and the plurality of the patch resistors are arranged between the potentiometer and the second end of the coupling microstrip in parallel.
4. The signal coupling circuit of claim 1,
the resistance value of the patch resistor is 0-70 omega.
5. The signal coupling circuit of claim 1,
the signal coupling element is a coupling sheet or a microstrip line.
6. The signal coupling circuit according to any of claims 1-5,
the signal output circuit includes: the circuit comprises a first capacitor, a rheostat, a resistor, a second capacitor, a third capacitor, a fourth capacitor and a signal output end;
the first end of the first capacitor is in signal connection with the first end of the signal coupling element, and the second end of the first capacitor is grounded; the adjustable end of the rheostat is in signal connection with the first end of the signal coupling element, the first end of the rheostat is in signal connection with the first end of the resistor, and the second end of the resistor is grounded; the first end of the second capacitor is in signal connection with the first end of the rheostat, and the second end of the second capacitor is in signal connection with the signal output end, the first end of the third capacitor and the first end of the fourth capacitor; and the second end of the third capacitor is grounded, and the second end of the fourth capacitor is grounded.
7. A coupler circuit, characterized in that,
the coupler circuit includes a main signal circuit and a signal coupling circuit, the signal coupling circuit including:
the signal coupling element is coupled with the main signal circuit;
a signal output circuit connected to a first end of the signal coupling element;
a signal isolation circuit connected to a second end of the signal coupling element;
wherein the signal isolation circuit comprises:
the potentiometer comprises a grounding end and an adjusting end, wherein the grounding end is grounded;
one end of at least one patch resistor is connected with the adjusting end of the potentiometer, and one end of at least one patch resistor is connected with the second end of the signal coupling element.
8. The coupler circuit of claim 7,
the signal isolation circuit comprises a plurality of the patch resistors, the plurality of the patch resistors are arranged between the potentiometer and the second end of the signal coupling element in series, or the plurality of the patch resistors are arranged between the potentiometer and the second end of the signal coupling element in parallel.
9. The coupler circuit of claim 7,
the resistance value of the patch resistor is 0-70 omega.
10. A coupler circuit according to any of claims 7 to 9, comprising a coupler circuit according to any of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911344635.2A CN113036383A (en) | 2019-12-24 | 2019-12-24 | Signal coupling circuit, coupler circuit and coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911344635.2A CN113036383A (en) | 2019-12-24 | 2019-12-24 | Signal coupling circuit, coupler circuit and coupler |
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| Publication Number | Publication Date |
|---|---|
| CN113036383A true CN113036383A (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911344635.2A Pending CN113036383A (en) | 2019-12-24 | 2019-12-24 | Signal coupling circuit, coupler circuit and coupler |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201215824Y (en) * | 2008-02-21 | 2009-04-01 | 华为技术有限公司 | Directional coupler and signal detection system |
| CN105164850A (en) * | 2013-05-06 | 2015-12-16 | 罗德施瓦兹两合股份有限公司 | Directional coupler |
| CN106411365A (en) * | 2016-12-20 | 2017-02-15 | 中国电子科技集团公司第三十八研究所 | Microwave signal coupling apparatus |
| CN211126000U (en) * | 2019-12-24 | 2020-07-28 | 深圳市大富科技股份有限公司 | Signal coupling circuit, coupler circuit and coupler |
-
2019
- 2019-12-24 CN CN201911344635.2A patent/CN113036383A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201215824Y (en) * | 2008-02-21 | 2009-04-01 | 华为技术有限公司 | Directional coupler and signal detection system |
| CN105164850A (en) * | 2013-05-06 | 2015-12-16 | 罗德施瓦兹两合股份有限公司 | Directional coupler |
| CN106411365A (en) * | 2016-12-20 | 2017-02-15 | 中国电子科技集团公司第三十八研究所 | Microwave signal coupling apparatus |
| CN211126000U (en) * | 2019-12-24 | 2020-07-28 | 深圳市大富科技股份有限公司 | Signal coupling circuit, coupler circuit and coupler |
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