CN111884624A - Impedance matching circuit for improving signal output power - Google Patents
Impedance matching circuit for improving signal output power Download PDFInfo
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- CN111884624A CN111884624A CN202010773802.1A CN202010773802A CN111884624A CN 111884624 A CN111884624 A CN 111884624A CN 202010773802 A CN202010773802 A CN 202010773802A CN 111884624 A CN111884624 A CN 111884624A
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- impedance matching
- circuit
- signal
- output power
- signal output
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- 230000005669 field effect Effects 0.000 claims abstract description 13
- 238000003079 width control Methods 0.000 claims abstract description 10
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000008054 signal transmission Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/28—Impedance matching networks
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Abstract
The invention relates to an impedance matching circuit for improving signal output power, which is connected in parallel between a signal sending device and a signal receiving device and comprises a circuit power supply, wherein the circuit power supply is connected in parallel with the signal receiving device through an impedance matching wire; and the other interface end of the field effect tube is connected with a pulse width control circuit. The impedance matching circuit for improving the signal output power can achieve the aim of impedance matching, reduce the energy consumption, improve the reliability of the circuit, absorb the redundant energy to feed back to the power supply and improve the utilization rate of the energy.
Description
Technical Field
The invention relates to the field of impedance matching circuits, in particular to an impedance matching circuit for improving signal output power.
Background
In the circuit design process, when the impedance of the output signal is matched with the impedance of the power supply, the output power of the signal is the maximum, and at the moment, the output distance of the signal is the farthest. In the existing circuit design process, impedance matching is often performed by means of parallel resistors or extension lines, although the method can achieve the effect of circuit impedance matching, when current passes through the resistors or the extra extension lines, a part of energy is lost, and the unreliability of the circuit board is increased due to the heating of the resistors and the extension lines. Now, in order to make the output signal more stable, therefore, it is necessary for the signal to reach the maximum power output, and when the maximum power output is reached, the reflected wave of the signal can be reduced, so that the transmission is more reliable, in order to make the signal reach the maximum power output, it is necessary to ensure that the impedance of the signal matches the internal resistance of the power supply, and in order to ensure the above purpose, the prior art generally: the resistance load is connected in parallel, the line is adjusted, and the impedance of the line is increased by prolonging the line, so that the output impedance is improved. The resistance is increased or the impedance of the circuit is increased, so that energy loss is caused, extra heat is generated, the reliability of the circuit is reduced, and the power consumption of the power supply is increased.
Disclosure of Invention
The present invention provides an impedance matching circuit for improving signal output power, which can achieve the purpose of impedance matching, reduce energy consumption, improve circuit reliability, absorb redundant energy to feed back to a power supply, and improve energy utilization rate.
The technical scheme adopted by the invention for solving the technical problems is as follows: an impedance matching circuit for improving signal output power is connected in parallel between a signal sending device and a signal receiving device, and comprises a circuit power supply which is connected in parallel with the signal receiving device through an impedance matching wire, wherein the impedance matching wires on two sides of the circuit power supply are respectively connected in series with an inductance coil and a field effect transistor; and the other interface end of the field effect tube is connected with a pulse width control circuit.
Preferably, the pulse width control circuit is connected to a gate of the field effect transistor.
Preferably, the circuit supplies power and has a capacitor.
The invention has the beneficial effects that: an impedance matching circuit for improving signal output power can achieve the aim of impedance matching, reduce energy consumption, improve the reliability of the circuit, absorb redundant energy to feed back to a power supply, and improve the utilization rate of the energy.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic diagram of a circuit connection structure of an impedance matching circuit for improving signal output power according to the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
Example 1
An impedance matching circuit for improving signal output power is connected in parallel between a signal sending device and a signal receiving device, and comprises a circuit power supply which is connected in parallel with the signal receiving device through an impedance matching wire, wherein the impedance matching wires on two sides of the circuit power supply are respectively connected in series with an inductance coil and a field effect transistor; and the other interface end of the field effect tube is connected with a pulse width control circuit.
The pulse width control circuit is connected to the grid of the field effect transistor. The circuit supplies power and has a capacitor.
The following modules are composed as in fig. 1: the impedance matching wire D, the inductance coil E, the field effect tube F, the pulse width control device I and the capacitor form G.
When the signal source a sends a signal to the signal receiving end C, the transmission conductor line B needs to add a certain impedance to implement impedance matching of the signal, at this time, the power of the signal sent by the signal source is the largest, and the quality of the transmitted signal is the best.
The impedance matching wire D is bridged at two ends of the signal transmission wire B, when the signal transmission wire needs specific impedance, the pulse width control circuit I generates a corresponding high-frequency pulse width modulation signal, the signal is provided for the field corresponding tube F, the field effect tube F receives the pulse width modulation signal and then becomes a corresponding high-frequency switch modulation signal to control the on-off of the current of the impedance matching wire D, and the current of the wire D is continuous due to the fact that the inductance coil E has the follow current effect on the current. Under the action, the current magnitude of the wire is related to the pulse width magnitude of the high-frequency pulse width modulation signal.
The impedance matching wire D has a shunting effect on the signal transmission wire B, namely, the output current of the signal transmission wire B is changed, under the condition that the voltage of the signal transmission wire B is certain, the output impedance is equal to the output voltage/output current (ohm law), namely, the output impedance is changed, and the purpose of impedance matching is realized by adjusting the pulse width control circuit.
The current in the impedance matching wire D forms stable voltage in the capacitor G, and the voltage is superposed into the power supply H, so that the recovery and the utilization of energy are realized.
Because the internal resistances of the impedance matching wire D, the inductance coil E, the field effect transistor F and the capacitor G are very small, the heat generated when the current flows through is very small, namely the heat generated by the circuit is reduced, and the reliability of the circuit is enhanced.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (3)
1. An impedance matching circuit for increasing signal output power, connected in parallel between a signal emitting device and a signal receiving device, comprising: the circuit power supply is connected in parallel to the signal receiving equipment through impedance matching wires, and the impedance matching wires on two sides of the circuit power supply are respectively connected in series with an inductance coil and a field effect tube; and the other interface end of the field effect tube is connected with a pulse width control circuit.
2. An impedance matching circuit for increasing signal output power according to claim 1, wherein: the pulse width control circuit is connected to the grid of the field effect transistor.
3. An impedance matching circuit for increasing signal output power according to claim 2, wherein: the circuit supplies power and has a capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010773802.1A CN111884624A (en) | 2020-08-04 | 2020-08-04 | Impedance matching circuit for improving signal output power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010773802.1A CN111884624A (en) | 2020-08-04 | 2020-08-04 | Impedance matching circuit for improving signal output power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111884624A true CN111884624A (en) | 2020-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010773802.1A Pending CN111884624A (en) | 2020-08-04 | 2020-08-04 | Impedance matching circuit for improving signal output power |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101309639A (en) * | 2005-10-24 | 2008-11-19 | 鲍尔卡斯特公司 | Method and apparatus for high efficiency rectification for various loads |
| CN104811031A (en) * | 2014-09-11 | 2015-07-29 | 杭州硅星科技有限公司 | Power management system and energy recycle unit thereof |
| CN104981822A (en) * | 2013-02-15 | 2015-10-14 | 株式会社理光 | Amplifier circuit, antenna module, and radio communication device |
| CN105223526A (en) * | 2015-09-25 | 2016-01-06 | 沈阳东软医疗系统有限公司 | A kind of radio-frequency sending coil impedance matching circuit and method |
| CN107636959A (en) * | 2015-12-25 | 2018-01-26 | 株式会社京三制作所 | Impedance-matching device |
| US20190074915A1 (en) * | 2017-09-01 | 2019-03-07 | Powercast Corporation | Methods, systems, and apparatus for automatic rf power transmission and single antenna energy harvesting |
-
2020
- 2020-08-04 CN CN202010773802.1A patent/CN111884624A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101309639A (en) * | 2005-10-24 | 2008-11-19 | 鲍尔卡斯特公司 | Method and apparatus for high efficiency rectification for various loads |
| CN104981822A (en) * | 2013-02-15 | 2015-10-14 | 株式会社理光 | Amplifier circuit, antenna module, and radio communication device |
| CN104811031A (en) * | 2014-09-11 | 2015-07-29 | 杭州硅星科技有限公司 | Power management system and energy recycle unit thereof |
| CN105223526A (en) * | 2015-09-25 | 2016-01-06 | 沈阳东软医疗系统有限公司 | A kind of radio-frequency sending coil impedance matching circuit and method |
| CN107636959A (en) * | 2015-12-25 | 2018-01-26 | 株式会社京三制作所 | Impedance-matching device |
| US20190074915A1 (en) * | 2017-09-01 | 2019-03-07 | Powercast Corporation | Methods, systems, and apparatus for automatic rf power transmission and single antenna energy harvesting |
Non-Patent Citations (1)
| Title |
|---|
| 孙子文;沈星;李海明;: "一种高效压电式能量回收接口电路的优化设计", 电子元件与材料, no. 10 * |
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