CN204794909U - A RF power amplifier for coupling resonance wireless power transmission device - Google Patents
A RF power amplifier for coupling resonance wireless power transmission device Download PDFInfo
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Abstract
The utility model provides a RF power amplifier for coupling resonance wireless power transmission device, the input impedance matching network who sets up adopts coaxial line transformer matching component, can obtain great input power and great work bandwidth, the power amplification pipe is for recommending the type structure, suppression even -order harmonic that can be fine, enhances system efficiency, the biasing network provides the dc bias for the grid and the drain electrode of power amplification pipe, it can be good to make power amplification manage, normal work, the biasing network opens circuit to radiofrequency signal, to the direct current short circuit, each stabilization network improves the stability of whole frequency of operation section, output impedance matching network realizes output impedance and load and pulls the best output impedance's of gained conjugate match, thereby acquire maximum output power, also further improve the width of frequency of operation section. The utility model is suitable for a magnetic coupling resonant mode wireless power transmission system can obtain wideer frequency of operation section, higher output, suppression second harmonic weight that can be fine, the further stability that improves.
Description
Technical field
The utility model relates to radio frequency amplifying technique field, particularly relates to a kind of radio-frequency power amplifier for coupled resonance wireless electric energy transmission device.
Background technology
Along with the rise and development of wireless communication technology and wireless power transmission technology, radio-frequency power amplifier is as an important component part of emitting stage, play key player in the entire system, its effect, after radio frequency signal carries out receiving and amplify, signal is sent to antenna or load.In some short wave applications occasions and magnet coupled resonant type wireless field of power transmission, usually need operating frequency section wider, the amplifier that power output is larger.And in design in the past, often bandwidth of operation is narrower or power output is little.
Utility model content
The utility model provides a kind of radio-frequency power amplifier for coupled resonance wireless electric energy transmission device, solves the problem that existing radio-frequency power amplifier operating frequency section is narrow and power output is low.
The utility model solves the problem by the following technical programs:
For a radio-frequency power amplifier for coupled resonance wireless electric energy transmission device, change Ba Lun T6 by input conversion Ba Lun T1, input resistant matching network, power amplifier tube, stabilizing network, biasing networks, output impedance matching networks and output and form; Stabilizing network comprises 4 stabilizing networks; Biasing networks comprises input biasing networks and output offset networking;
Input signal connects the input of input conversion Ba Lun T1, the input of output through input resistant matching networking power amplifier tube of Ba Lun T1 is changed in input, the output of power amplifier tube connects the input exporting conversion Ba Lun T6 through output impedance matching networks, export the output terminating load of conversion Ba Lun T6;
The input of input biasing networks is connected with DC power supply VG, and the positive output end of input biasing networks is connected on the positive pole of input resistant matching network output, and the negative output terminal of input biasing networks is connected on the negative pole of input resistant matching network output;
The input of output offset network is connected with DC power supply VD, and the positive output end of output offset network is connected on the positive pole of output impedance matching networks input, and the negative output terminal of output offset network is connected on the negative pole of output impedance matching networks input;
The positive pole of the first stabilizing network one termination input resistant matching network output, the positive pole of another termination output impedance matching networks input;
The negative pole of the second stabilizing network one termination input resistant matching network output, the negative pole of another termination output impedance matching networks input;
The positive pole of the 3rd stabilizing network one termination input resistant matching network output, another termination power ground;
The negative pole of the 4th stabilizing network one termination input resistant matching network output, another termination power ground.
In such scheme, described power amplifier tube is made up of 2 crystal amplifier tubes, wherein the grid of first crystal amplifier tube V1 connects the positive pole of input resistant matching network output, and the grid of the second crystal amplifier tube V2 connects the negative pole of input resistant matching network output; After the source electrode of first crystal amplifier tube V1 is connected with the source electrode of the second crystal amplifier tube V2, with power supply connect; The drain electrode of first crystal amplifier tube V1 connects the positive pole of output impedance matching networks input, and the drain electrode of the second crystal amplifier tube V2 connects the negative pole of output impedance matching networks input.
In such scheme, 2 crystal amplifier tubes are LDMOS power amplifier tube, and form push-pull type amplifier architecture.
In such scheme, the input of input conversion Ba Lun T1 is connected with input signal through an electric capacity C1.
In such scheme, described input resistant matching network is made up of coaxial line transformer T2, coaxial line transformer T3 and electric capacity C2; The input of coaxial line transformer T2 is the positive pole of input resistant matching network input, and the input of coaxial line transformer T3 is the negative pole of input resistant matching network input, and the two-way output changing Ba Lun T1 respectively with input is connected; The common port of coaxial line transformer T2 and coaxial line transformer T3 connects power supply ground through electric capacity C2; The output of coaxial line transformer T2 is the positive pole of input resistant matching network output, and the output of coaxial line transformer T3 is the negative pole of input resistant matching network output, is connected respectively with the two-way input of power amplifier tube.
In such scheme, described output impedance matching networks is made up of coaxial line transformer T4, coaxial line transformer T5, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C11, inductance L 5 and inductance L 6; Electric capacity C7 is connected with inductance L 5, common port is the positive pole of output impedance matching networks input, another termination power ground of electric capacity C7, the other end of inductance L 5 is connected with the input of coaxial line transformer T4, and the output of coaxial line transformer T4 is connected with the road input that Ba Lun T6 is changed in output through electric capacity C9; The common port of coaxial line transformer T4 and coaxial line transformer T5 connects power supply ground through electric capacity C11; Electric capacity C8 is connected with inductance L 6, common port is the negative pole of output impedance matching networks input, another termination power ground of electric capacity C8, the other end of inductance L 6 is connected with the input of coaxial line transformer T5, and the output of coaxial line transformer T5 is connected with another road input that Ba Lun T6 is changed in output through electric capacity C10.
In such scheme, described input biasing networks is made up of inductance L 1, inductance L 2, electric capacity C12, electric capacity C13 and electric capacity C14; One end of inductance L 1 is the input of input biasing networks, be connected with DC power supply VG, be connected with one end of inductance L 2, the other end of inductance L 1 is the positive output end of input biasing networks, is connected with the positive pole of input resistant matching network output, and the other end of inductance L 2 is the negative output terminal of input biasing networks, be connected with the negative pole of input resistant matching network output, electric capacity C12, electric capacity C13, electric capacity C14 are in parallel, and one end is connected with DC power supply VG, another termination power ground.
In such scheme, described output offset network is made up of inductance L 3, inductance L 4, electric capacity C15, electric capacity C16 and electric capacity C17; One end of inductance L 3 is the input of output offset network, be connected with DC power supply VD, be connected with one end of inductance L 4, the other end of inductance L 3 is the negative output terminal of output offset network, is connected with the negative pole of output impedance matching networks input, and the other end of inductance L 4 is the positive output end of output offset network, be connected with the positive pole of output impedance matching networks input, electric capacity C15, electric capacity C16, electric capacity C17 are in parallel, and one end is connected with DC power supply VD, another termination power ground.
In such scheme, described first stabilizing network is made up of resistance R3 and electric capacity C5, the positive pole of a termination output impedance matching networks input of resistance R3, and the other end of resistance R3 connects the positive pole of input resistant matching network output through electric capacity C5; Described second stabilizing network is made up of resistance R2 and electric capacity C6, the negative pole of a termination output impedance matching networks input of resistance R2, and the other end of resistance R2 connects the negative pole of input resistant matching network output through electric capacity C6; Described 3rd stabilizing network is made up of resistance R1 and electric capacity C3, the positive pole of a termination input resistant matching network output of resistance R1, and the other end of resistance R1 connects power supply ground through electric capacity C3; Described 4th stabilizing network is made up of resistance R2 and electric capacity C4, the negative pole of a termination input resistant matching network output of resistance R2, and the other end of resistance R2 connects power supply ground through electric capacity C4.
Advantage of the present utility model and effect are:
The utility model provides a kind of radio-frequency power amplifier for coupled resonance wireless electric energy transmission device, the input resistant matching network arranged adopts coaxial line transformer as matching element, larger input power and larger bandwidth of operation can be obtained, power amplifier tube is push-pull type structure, can be good at suppressing even-order harmonic, improve system effectiveness, the grid that biasing networks is power amplifier tube and drain electrode provide direct current (DC) bias, make power amplifier tube can be good, normal work, the open circuit of biasing networks radio frequency signal, to direct-current short circuit, each stabilizing network improves the stability of whole operating frequency section, output impedance matching networks realizes the conjugate impedance match of the best output impedance of output impedance and load balance factor gained, thus acquisition peak power output, also the width of operating frequency section is improved further.The utility model is applicable to magnet coupled resonant type wireless transmission system, can obtain wider operating frequency section, higher power output, can be good at suppressing second harmonic component, improves stability further.
Accompanying drawing explanation
Fig. 1 is a kind of theory diagram of the radio-frequency power amplifier for coupled resonance wireless electric energy transmission device.
Fig. 2 is a kind of circuit theory diagrams of the radio-frequency power amplifier for coupled resonance wireless electric energy transmission device.
Embodiment
A kind of radio-frequency power amplifier for coupled resonance wireless electric energy transmission device, as depicted in figs. 1 and 2, change Ba Lun T6 by input conversion Ba Lun T1, input resistant matching network, power amplifier tube, stabilizing network, biasing networks, output impedance matching networks and output to form.Stabilizing network comprises 4 stabilizing networks.Biasing networks comprises input biasing networks and output offset networking.Input signal connects the input of input conversion Ba Lun T1, the input of output through input resistant matching networking power amplifier tube of Ba Lun T1 is changed in input, the output of power amplifier tube connects the input exporting conversion Ba Lun T6 through output impedance matching networks, export the output terminating load of conversion Ba Lun T6.The input of input biasing networks is connected with DC power supply VG, and the positive output end of input biasing networks is connected on the positive pole of input resistant matching network output, and the negative output terminal of input biasing networks is connected on the negative pole of input resistant matching network output.The input of output offset network is connected with DC power supply VD, and the positive output end of output offset network is connected on the positive pole of output impedance matching networks input, and the negative output terminal of output offset network is connected on the negative pole of output impedance matching networks input.The positive pole of the first stabilizing network one termination input resistant matching network output, the positive pole of another termination output impedance matching networks input.The negative pole of the second stabilizing network one termination input resistant matching network output, the negative pole of another termination output impedance matching networks input.The positive pole of the 3rd stabilizing network one termination input resistant matching network output, another termination power ground.The negative pole of the 4th stabilizing network one termination input resistant matching network output, another termination power ground.
The input of input conversion Ba Lun T1 is connected with input signal through an electric capacity C1.Input is changed Ba Lun T1 and is realized on magnet ring into components and parts with 50 Ω coaxial lines, and coaxial line length l should meet equation
its effect is the imbalance-balance conversion in order to realize input signal.
Input resistant matching network adopts coaxial line transformer as matching element, and realize the conjugate impedance match of input impedance and best input impedance, the source impedance by 50 Ω is transformed into best input impedance Z
opt1conjugation Z
* opt1, thus obtain maximum input power; Adopt coaxial line transformer radio-frequency power amplifier can be made to obtain wider operating frequency section as matching element, thus realize the amplification of 1-30MHz frequency band radiofrequency signal.The output of the input termination input conversion Ba Lun T1 of input resistant matching network, exports termination power amplifier tube.Input resistant matching network is made up of coaxial line transformer T2, coaxial line transformer T3 and electric capacity C2; The input of coaxial line transformer T2 is the positive pole of input resistant matching network input, and the input of coaxial line transformer T3 is the negative pole of input resistant matching network input, and the two-way output changing Ba Lun T1 respectively with input is connected; The common port of coaxial line transformer T2 and coaxial line transformer T3 connects power supply ground through electric capacity C2; The output of coaxial line transformer T2 is the positive pole of input resistant matching network output, and the output of coaxial line transformer T3 is the negative pole of input resistant matching network output, is connected respectively with the two-way input of power amplifier tube.
Power amplifier tube adopts the push-pull type structure amplifying circuit be made up of 2 LDMOS pipes, and this push-pull type structure can be good at suppressing even-order harmonic, improves system effectiveness, and LDMOS pipe has the lower advantage of parasitic parameter simultaneously.Power amplifier tube is made up of 2 crystal amplifier tubes, and wherein the grid of first crystal amplifier tube V1 connects the positive pole of input resistant matching network output, and the grid of the second crystal amplifier tube V2 connects the negative pole of input resistant matching network output; After the source electrode of first crystal amplifier tube V1 is connected with the source electrode of the second crystal amplifier tube V2, with power supply connect; The drain electrode of first crystal amplifier tube V1 connects the positive pole of output impedance matching networks input, and the drain electrode of the second crystal amplifier tube V2 connects the negative pole of output impedance matching networks input.
Biasing networks is formed primarily of inductance and electric capacity, its effect is to provide direct current (DC) bias to the grid of power amplifier tube and drain electrode, power amplifier tube can well, normally be worked, and the design of biasing networks simultaneously also should meet the open circuit of radio frequency signal, the feature of direct-current short circuit.Input biasing networks is made up of inductance L 1, inductance L 2, electric capacity C12, electric capacity C13 and electric capacity C14; One end of inductance L 1 is the input of input biasing networks, be connected with DC power supply VG, be connected with one end of inductance L 2, the other end of inductance L 1 is the positive output end of input biasing networks, is connected with the positive pole of input resistant matching network output, and the other end of inductance L 2 is the negative output terminal of input biasing networks, be connected with the negative pole of input resistant matching network output, electric capacity C12, electric capacity C13, electric capacity C14 are in parallel, and one end is connected with DC power supply VG, another termination power ground.Output offset network is made up of inductance L 3, inductance L 4, electric capacity C15, electric capacity C16 and electric capacity C17; One end of inductance L 3 is the input of output offset network, be connected with DC power supply VD, be connected with one end of inductance L 4, the other end of inductance L 3 is the negative output terminal of output offset network, is connected with the negative pole of output impedance matching networks input, and the other end of inductance L 4 is the positive output end of output offset network, be connected with the positive pole of output impedance matching networks input, electric capacity C15, electric capacity C16, electric capacity C17 are in parallel, and one end is connected with DC power supply VD, another termination power ground.2 biasing networks radio frequency signals open circuit and to direct-current short circuit, radiofrequency signal is prevented to flow into DC power supply through biasing networks, make direct voltage can be loaded into grid and the drain electrode of power amplifier tube smoothly simultaneously, regulate direct voltage source VG and VD that utility model works can be made in satisfactory operating state.It should be noted that inductance is selected to be entwined by enamelled wire usually, instead of choice for use choke induction because power output is comparatively large.
Stabilizing network has 4, is to be made up of the lamped element such as resistance, electric capacity.The trend of concussion may be had under some frequency band or certain terminal condition in radio-frequency power amplifier, thus amplifying power pipe is burnt, therefore need to add stabilizing network in the design, the utility model can be made to have good stability in whole operating frequency section.First stabilizing network is made up of resistance R3 and electric capacity C5, the positive pole of a termination output impedance matching networks input of resistance R3, and the other end of resistance R3 connects the positive pole of input resistant matching network output through electric capacity C5; Second stabilizing network is made up of resistance R2 and electric capacity C6, the negative pole of a termination output impedance matching networks input of resistance R2, and the other end of resistance R2 connects the negative pole of input resistant matching network output through electric capacity C6; 3rd stabilizing network is made up of resistance R1 and electric capacity C3, the positive pole of a termination input resistant matching network output of resistance R1, and the other end of resistance R1 connects power supply ground through electric capacity C3; 4th stabilizing network is made up of resistance R2 and electric capacity C4, the negative pole of a termination input resistant matching network output of resistance R2, and the other end of resistance R2 connects power supply ground through electric capacity C4.
Output impedance matching networks, the components and parts of employing are coaxial line transformer and the element such as inductance, electric capacity, and the quality of output matching can the power output of influential system, and multiple performance index such as efficiency, therefore need to do accurate coupling.The effect of output matching network is the conjugate impedance match of the best output impedance in order to realize output impedance and load balance factor gained, thus acquisition peak power output, same employing coaxial line transformer does coupling and radio-frequency power amplifier can be made to obtain wider operating frequency section, is also the amplification in order to realize 1-30MHz frequency band radiofrequency signal.Output matching network adopts coaxial line transformer to carry out real number impedance transformation, utilizes inductance and electric capacity to coordinate the conversion of imaginary part, the load matched of output has been become best output loading Z like this
opt2conjugation Z
* opt2.Output impedance matching networks is made up of coaxial line transformer T4, coaxial line transformer T5, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C11, inductance L 5 and inductance L 6; Electric capacity C7 is connected with inductance L 5, common port is the positive pole of output impedance matching networks input, another termination power ground of electric capacity C7, the other end of inductance L 5 is connected with the input of coaxial line transformer T4, and the output of coaxial line transformer T4 is connected with the road input that Ba Lun T6 is changed in output through electric capacity C9; The common port of coaxial line transformer T4 and coaxial line transformer T5 connects power supply ground through electric capacity C11; Electric capacity C8 is connected with inductance L 6, common port is the negative pole of output impedance matching networks input, another termination power ground of electric capacity C8, the other end of inductance L 6 is connected with the input of coaxial line transformer T5, and the output of coaxial line transformer T5 is connected with another road input that Ba Lun T6 is changed in output through electric capacity C10.
Export the output terminating load of conversion Ba Lun T6.The same with input conversion Ba Lun T1, export conversion Ba Lun T6 be also employing 50 Ω coaxial line as element around on magnet ring, coaxial line length l should meet equation
its effect is the conversion in order to realize the balanced-unbalanced outputed signal.
The specific works process of the utility model device is: the direct voltage first regulating biasing networks, makes utility model works in suitable operating state.Under the operating state regulated, the radio-frequency input signals of 1-30MHz is divided into two balanced signals through input conversion Ba Lun T1 and sends input resistant matching network to, after input resistant matching network, amplifying circuit can obtain maximum input power and amplify input signal, then send to through output impedance matching networks and export conversion Ba Lun T6, output conversion Ba Lun T6 converts two balanced signals to unbalanced signal and flows to load.
Claims (9)
1. for a radio-frequency power amplifier for coupled resonance wireless electric energy transmission device, it is characterized in that: change Ba Lun T6 by input conversion Ba Lun T1, input resistant matching network, power amplifier tube, stabilizing network, biasing networks, output impedance matching networks and output and form; Stabilizing network comprises 4 stabilizing networks; Biasing networks comprises input biasing networks and output offset networking;
Input signal connects the input of input conversion Ba Lun T1, the input of output through input resistant matching networking power amplifier tube of Ba Lun T1 is changed in input, the output of power amplifier tube connects the input exporting conversion Ba Lun T6 through output impedance matching networks, export the output terminating load of conversion Ba Lun T6;
The input of input biasing networks is connected with DC power supply VG, and the positive output end of input biasing networks is connected on the positive pole of input resistant matching network output, and the negative output terminal of input biasing networks is connected on the negative pole of input resistant matching network output;
The input of output offset network is connected with DC power supply VD, and the positive output end of output offset network is connected on the positive pole of output impedance matching networks input, and the negative output terminal of output offset network is connected on the negative pole of output impedance matching networks input;
The positive pole of the first stabilizing network one termination input resistant matching network output, the positive pole of another termination output impedance matching networks input;
The negative pole of the second stabilizing network one termination input resistant matching network output, the negative pole of another termination output impedance matching networks input;
The positive pole of the 3rd stabilizing network one termination input resistant matching network output, another termination power ground;
The negative pole of the 4th stabilizing network one termination input resistant matching network output, another termination power ground.
2. a kind of radio-frequency power amplifier for coupled resonance wireless electric energy transmission device according to claim 1, it is characterized in that: described power amplifier tube is made up of 2 crystal amplifier tubes, wherein the grid of first crystal amplifier tube V1 connects the positive pole of input resistant matching network output, and the grid of the second crystal amplifier tube V2 connects the negative pole of input resistant matching network output; After the source electrode of first crystal amplifier tube V1 is connected with the source electrode of the second crystal amplifier tube V2, with power supply connect; The drain electrode of first crystal amplifier tube V1 connects the positive pole of output impedance matching networks input, and the drain electrode of the second crystal amplifier tube V2 connects the negative pole of output impedance matching networks input.
3. a kind of radio-frequency power amplifier for coupled resonance wireless electric energy transmission device according to claim 2, is characterized in that: 2 crystal amplifier tubes are LDMOS power amplifier tube, and form push-pull type amplifier architecture.
4. a kind of radio-frequency power amplifier for coupled resonance wireless electric energy transmission device according to claim 1, is characterized in that: the input of input conversion Ba Lun T1 is connected with input signal through an electric capacity C1.
5. a kind of radio-frequency power amplifier for coupled resonance wireless electric energy transmission device according to claim 1, is characterized in that: described input resistant matching network is made up of coaxial line transformer T2, coaxial line transformer T3 and electric capacity C2; The input of coaxial line transformer T2 is the positive pole of input resistant matching network input, and the input of coaxial line transformer T3 is the negative pole of input resistant matching network input, and the two-way output changing Ba Lun T1 respectively with input is connected; The common port of coaxial line transformer T2 and coaxial line transformer T3 connects power supply ground through electric capacity C2; The output of coaxial line transformer T2 is the positive pole of input resistant matching network output, and the output of coaxial line transformer T3 is the negative pole of input resistant matching network output, is connected respectively with the two-way input of power amplifier tube.
6. a kind of radio-frequency power amplifier for coupled resonance wireless electric energy transmission device according to claim 1, is characterized in that: described output impedance matching networks is made up of coaxial line transformer T4, coaxial line transformer T5, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C11, inductance L 5 and inductance L 6; Electric capacity C7 is connected with inductance L 5, common port is the positive pole of output impedance matching networks input, another termination power ground of electric capacity C7, the other end of inductance L 5 is connected with the input of coaxial line transformer T4, and the output of coaxial line transformer T4 is connected with the road input that Ba Lun T6 is changed in output through electric capacity C9; The common port of coaxial line transformer T4 and coaxial line transformer T5 connects power supply ground through electric capacity C11; Electric capacity C8 is connected with inductance L 6, common port is the negative pole of output impedance matching networks input, another termination power ground of electric capacity C8, the other end of inductance L 6 is connected with the input of coaxial line transformer T5, and the output of coaxial line transformer T5 is connected with another road input that Ba Lun T6 is changed in output through electric capacity C10.
7. a kind of radio-frequency power amplifier for coupled resonance wireless electric energy transmission device according to claim 1, is characterized in that: described input biasing networks is made up of inductance L 1, inductance L 2, electric capacity C12, electric capacity C13 and electric capacity C14; One end of inductance L 1 is the input of input biasing networks, be connected with DC power supply VG, be connected with one end of inductance L 2, the other end of inductance L 1 is the positive output end of input biasing networks, is connected with the positive pole of input resistant matching network output, and the other end of inductance L 2 is the negative output terminal of input biasing networks, be connected with the negative pole of input resistant matching network output, electric capacity C12, electric capacity C13, electric capacity C14 are in parallel, and one end is connected with DC power supply VG, another termination power ground.
8. a kind of radio-frequency power amplifier for coupled resonance wireless electric energy transmission device according to claim 1, is characterized in that: described output offset network is made up of inductance L 3, inductance L 4, electric capacity C15, electric capacity C16 and electric capacity C17; One end of inductance L 3 is the input of output offset network, be connected with DC power supply VD, be connected with one end of inductance L 4, the other end of inductance L 3 is the negative output terminal of output offset network, is connected with the negative pole of output impedance matching networks input, and the other end of inductance L 4 is the positive output end of output offset network, be connected with the positive pole of output impedance matching networks input, electric capacity C15, electric capacity C16, electric capacity C17 are in parallel, and one end is connected with DC power supply VD, another termination power ground.
9. a kind of radio-frequency power amplifier for coupled resonance wireless electric energy transmission device according to claim 1, is characterized in that:
Described first stabilizing network is made up of resistance R3 and electric capacity C5, the positive pole of a termination output impedance matching networks input of resistance R3, and the other end of resistance R3 connects the positive pole of input resistant matching network output through electric capacity C5;
Described second stabilizing network is made up of resistance R2 and electric capacity C6, the negative pole of a termination output impedance matching networks input of resistance R2, and the other end of resistance R2 connects the negative pole of input resistant matching network output through electric capacity C6;
Described 3rd stabilizing network is made up of resistance R1 and electric capacity C3, the positive pole of a termination input resistant matching network output of resistance R1, and the other end of resistance R1 connects power supply ground through electric capacity C3;
Described 4th stabilizing network is made up of resistance R2 and electric capacity C4, the negative pole of a termination input resistant matching network output of resistance R2, and the other end of resistance R2 connects power supply ground through electric capacity C4.
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| CN110729975A (en) * | 2019-10-11 | 2020-01-24 | 贵州省质安交通工程监控检测中心有限责任公司 | Magnetic coupling resonant wireless power transmission power amplification system |
| CN110729975B (en) * | 2019-10-11 | 2023-10-27 | 贵州省质安交通工程监控检测中心有限责任公司 | Magnetic coupling resonant wireless power transmission power amplifier system |
| CN111600559A (en) * | 2020-06-16 | 2020-08-28 | 锐石创芯（深圳）科技有限公司 | Power amplifier output matching circuit, radio frequency front end module and wireless device |
| CN111600559B (en) * | 2020-06-16 | 2021-07-06 | 锐石创芯（深圳）科技有限公司 | Power amplifier output matching circuit, radio frequency front end module and wireless device |
| CN112886932A (en) * | 2021-01-22 | 2021-06-01 | 上海华虹宏力半导体制造有限公司 | Power amplifier with linear design |
| CN112886932B (en) * | 2021-01-22 | 2024-04-12 | 上海华虹宏力半导体制造有限公司 | Power amplifier with linearization design |
| CN112953246B (en) * | 2021-02-23 | 2023-03-07 | 哈尔滨工业大学（深圳） | High-frequency power source system and load driving system |
| CN112953246A (en) * | 2021-02-23 | 2021-06-11 | 哈尔滨工业大学（深圳） | High-frequency power source system and load driving system |
| CN115882807A (en) * | 2023-03-09 | 2023-03-31 | 季华实验室 | Impedance matching circuit and impedance matching method of radio frequency switch tube |
| CN115882807B (en) * | 2023-03-09 | 2023-06-02 | 季华实验室 | Impedance matching circuit and impedance matching method of radio frequency switch tube |
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