CN111239483A - Power calibration system and calibration method of radio frequency power amplifier module - Google Patents
Power calibration system and calibration method of radio frequency power amplifier module Download PDFInfo
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- CN111239483A CN111239483A CN202010185153.3A CN202010185153A CN111239483A CN 111239483 A CN111239483 A CN 111239483A CN 202010185153 A CN202010185153 A CN 202010185153A CN 111239483 A CN111239483 A CN 111239483A
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- power amplifier
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2822—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere of microwave or radiofrequency circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2834—Automated test systems [ATE]; using microprocessors or computers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a power calibration system and a calibration method of a radio frequency power amplifier module, wherein the method comprises the following steps: the signal source provides an excitation signal for the driving stage power amplifier circuit; the micro-processing unit controls the current detection circuit to collect drain current of the final power amplifier circuit; the power detection unit collects the output power of the final power amplifier circuit; acquiring a plurality of drain currents and a plurality of corresponding output powers acquired under a plurality of excitation signals, and determining a functional relation with the drain currents as independent variables and the output powers as dependent variables according to the plurality of drain currents and the plurality of corresponding output powers; the micro-processing unit stores the functional relation; the scheme simplifies the circuit complexity of the power amplifier, reduces the volume of the circuit and also reduces the loss of output power.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a power calibration system and a power calibration method for a radio frequency power amplifier module.
Background
The radio frequency power amplifier module belongs to a core component of communication equipment, the output power precision of the radio frequency power amplifier module determines the precision of the whole communication equipment, and the whole communication equipment generally requires to detect and calibrate the output power of the radio frequency power amplifier module. In the rf power amplifier module, a detection circuit is generally provided to detect the output power of the power amplifier.
Referring to fig. 1, in the prior art, a signal source 7 provides an excitation signal, a coupler 2 and a detector circuit 3 are provided in a radio frequency power amplifier module 1, an output end of a final power amplifier circuit sends an output signal to the detector circuit 3 through the coupler 2, the radio frequency signal is converted into a voltage signal and sent to a microprocessor 4, and output power is sent to a power meter 6 after passing through an attenuator 5 and then sent to the microprocessor 4. The first method is to calculate the output power of the power amplifier according to the relationship between the voltage of the detector 3 and the input radio frequency power and the coupling degree of the coupler, and to calibrate by calling a compensation code table in a memory. The second method is to perform calibration by fitting a curve by testing the relationship between the output power of the radio frequency power amplifier module and the detection voltage.
The existing power detection calibration is difficult to find a proper device or is in an ideal working state due to signal types, working frequency bands, detector types, coupler sizes and the like, and the power precision of calibration is low.
Disclosure of Invention
In order to solve the problem of low precision of the conventional power detection calibration, the invention provides a power calibration system and a calibration method of a radio frequency power amplifier module.
A power calibration system of a radio frequency power amplifier module comprises the radio frequency power amplifier module, a signal source and a power detection unit;
the radio frequency power amplifier module comprises a driving stage power amplifier circuit, a final stage power amplifier circuit, a current detection circuit and a micro-processing unit; the driving stage power amplifier circuit is connected with the final stage power amplifier circuit, the current detection circuit is connected with the final stage power amplifier circuit, and the micro-processing unit is connected with the current detection circuit; the power detection unit is connected with the final power amplifier circuit;
the signal source is used for providing an excitation signal for the driving stage power amplifier circuit, the micro-processing unit is used for controlling the current detection circuit to collect drain current of the final stage power amplifier circuit, and the power detection unit is used for collecting output power of the final stage power amplifier circuit;
acquiring a plurality of drain currents and a plurality of corresponding output powers acquired under a plurality of excitation signals, and determining a functional relation with the drain currents as independent variables and the output powers as dependent variables according to the plurality of drain currents and the plurality of corresponding output powers;
the microprocessing unit is further configured to store the functional relationship.
Further, the power calibration system further comprises an attenuator connected between the final power amplifier circuit and the power detection unit, and configured to attenuate the output power according to a preset proportion.
Further, the current detection circuit comprises a current sampling chip and a sampling resistor, the sampling resistor is connected with the final power amplifier circuit, and the current sampling chip is connected with the sampling resistor and the micro-processing unit.
Further, the current sampling chip is an AD8217BRMZ chip.
Further, the micro-processing unit is a single chip microcomputer.
Further, the signal source and the driver stage power amplifier circuit are connected by a first radio frequency cable.
Further, the final power amplifier circuit and the attenuator are connected by a second radio frequency cable.
Further, the attenuator and the power detection unit are connected through a third radio frequency cable.
A power calibration method of a radio frequency power amplifier module, applied to the above power calibration apparatus, the method comprising:
the signal source provides an excitation signal for the driving stage power amplifier circuit;
the micro-processing unit controls the current detection circuit to collect drain current of the final power amplifier circuit;
the power detection unit collects the output power of the final power amplifier circuit;
acquiring a plurality of drain currents and a plurality of corresponding output powers acquired under a plurality of excitation signals, and determining a functional relation with the drain currents as independent variables and the output powers as dependent variables according to the plurality of drain currents and the plurality of corresponding output powers;
and the micro-processing unit stores the functional relation.
Compared with the prior art, the power calibration system and the calibration method of the radio frequency power amplifier module provided by the invention do not need a coupler and a detector, only needs to increase the drain current detection of the final power amplifier, simplifies the circuit complexity of the power amplifier, reduces the volume of the circuit and also reduces the loss of output power. The method does not need to pay attention to the difficulty in the type selection of the detector caused by the signal type, the limitation of the working frequency band, the dynamic range of the detector and the like, and is particularly suitable for high-power calibration.
Drawings
Fig. 1 is a diagram illustrating power calibration of a rf power amplifier module in the prior art.
Fig. 2 is a schematic structural diagram of an embodiment of a power calibration system of a radio frequency power amplifier module according to the present invention.
Fig. 3 is a schematic structural diagram of a current detection circuit in a power calibration system of a radio frequency power amplifier module according to an embodiment of the present invention.
FIG. 4 is a flowchart of an embodiment of a power calibration method for an RF power amplifier module according to the present invention
Detailed description of the preferred embodiments
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Referring to fig. 2, the present embodiment provides a power calibration system of an rf power amplifier module, which includes an rf power amplifier module 100, a signal source 200 and a power detection unit 300; the rf power amplifier module 100 includes a driving power amplifier circuit 101, a final power amplifier circuit 102, a current detection circuit 103, and a micro-processing unit 104; the driving stage power amplifier circuit 101 is connected with the final stage power amplifier circuit 102, the current detection circuit 103 is connected with the final stage power amplifier circuit 102, and the microprocessing unit 104 is connected with the current detection circuit 103; the power detection unit 300 is connected to the final power amplifier circuit 102;
the signal source 200 is used for providing an excitation signal for the driving-stage power amplifier circuit 101, the micro-processing unit 104 is used for controlling the current detection circuit 103 to collect drain current of the final-stage power amplifier circuit 102, and the power detection unit 300 is used for collecting output power of the final-stage power amplifier circuit 102;
acquiring a plurality of drain currents and a plurality of corresponding output powers acquired under a plurality of excitation signals, and determining a functional relation with the drain currents as independent variables and the output powers as dependent variables according to the plurality of drain currents and the plurality of corresponding output powers;
the micro-processing unit 104 is also configured to store the functional relationship.
In order to prevent the power detection unit from being damaged by the excessive power, the power calibration system further includes an attenuator 400 connected between the final power amplifier circuit 102 and the power detection unit 300, for attenuating the output power according to a preset ratio. The output power is attenuated according to a preset proportion and then sent to the power detection unit 300, and the value is increased according to the proportion during subsequent calculation.
Wherein the signal source 200 and the driver stage power amplifier circuit 101 are connected by a first radio frequency cable. The final power amplifier circuit 102 is connected to the attenuator 400 by a second radio frequency cable. The attenuator 400 and the power detection unit 300 are connected through a third rf cable.
Further, referring to fig. 3, the current detection circuit 103 includes a current sampling chip 1031 and a sampling resistor R, the sampling resistor R is connected to the final stage power amplifier circuit 102, and the current sampling chip 1031 is connected to the sampling resistor R and the micro processing unit 104.
The current sampling chip 1031 is an AD8217BRMZ chip.
The micro-processing unit 104 is a single chip microcomputer.
The power detection unit 300 is a power meter.
The working principle of the power calibration system of the radio frequency power amplifier module provided by the embodiment is as follows:
and powering on, turning on a gate voltage and drain voltage switch of the radio frequency power amplifier module, turning on the signal source 200, and inputting an excitation signal, wherein the power detection unit 300 can read an output power value P0, the micro processing unit 104 can also read a drain current Id of a final-stage power amplifier tube, and the magnitude of the input excitation signal is adjusted, so that different output powers and corresponding drain currents of the final-stage power amplifier tube can be obtained. Therefore, a two-dimensional table of the drain current and the output power can be obtained, so that a functional relation with the drain current as an independent variable and the output power as a dependent variable is obtained, the functional relation is stored in the micro-processing unit, when the power is collected next time, the drain current is collected only through the current detection circuit, and the corresponding power value can be calculated according to the functional relation.
Referring to fig. 4, the present embodiment further provides a power calibration method of a radio frequency power amplifier module, which is applied to the power calibration system described above, and the method includes:
step S101, a signal source provides an excitation signal for the driving stage power amplifier circuit;
step S102, a microprocessing unit controls the current detection circuit to collect drain current of the final power amplifier circuit;
step S103, a power detection unit collects the output power of the final power amplifier circuit;
step S104, acquiring a plurality of drain currents and a plurality of corresponding output powers acquired under a plurality of excitation signals, and determining a functional relation with the drain currents as independent variables and the output powers as dependent variables according to the plurality of drain currents and the plurality of corresponding output powers;
and step S105, the microprocessing unit stores the functional relation.
Compared with the prior art, the power calibration system and the calibration method of the radio frequency power amplifier module provided by the embodiment do not need a coupler and a detector, only needs to increase the drain current detection of the final power amplifier, simplifies the circuit complexity of the power amplifier, reduces the volume of the circuit, and reduces the loss of the output power. The method does not need to pay attention to the difficulty in the type selection of the detector caused by the signal type, the limitation of the working frequency band, the dynamic range of the detector and the like, and is particularly suitable for high-power calibration.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A power calibration system of a radio frequency power amplifier module is characterized by comprising the radio frequency power amplifier module, a signal source and a power detection unit;
the radio frequency power amplifier module comprises a driving stage power amplifier circuit, a final stage power amplifier circuit, a current detection circuit and a micro-processing unit; the driving stage power amplifier circuit is connected with the final stage power amplifier circuit, the current detection circuit is connected with the final stage power amplifier circuit, and the micro-processing unit is connected with the current detection circuit; the power detection unit is connected with the final power amplifier circuit;
the signal source is used for providing an excitation signal for the driving stage power amplifier circuit, the micro-processing unit is used for controlling the current detection circuit to collect drain current of the final stage power amplifier circuit, and the power detection unit is used for collecting output power of the final stage power amplifier circuit;
acquiring a plurality of drain currents and a plurality of corresponding output powers acquired under a plurality of excitation signals, and determining a functional relation with the drain currents as independent variables and the output powers as dependent variables according to the plurality of drain currents and the plurality of corresponding output powers;
the microprocessing unit is further configured to store the functional relationship.
2. The power calibration system of claim 1 further comprising an attenuator coupled between said final power amplifier circuit and said power detection unit for attenuating said output power by a predetermined ratio.
3. The power calibration system of claim 1 wherein the current detection circuit comprises a current sampling chip and a sampling resistor, the sampling resistor is connected to the final power amplifier circuit, and the current sampling chip is connected to the sampling resistor and the micro-processing unit.
4. The power calibration system of claim 3, wherein the current sampling chip is an AD8217BRMZ chip.
5. The power calibration system of claim 1, wherein the micro-processing unit is a single-chip microcomputer.
6. The power calibration system of claim 1, wherein the signal source and the driver stage power amplifier circuit are connected by a first radio frequency cable.
7. The power calibration system of the rf power amplifier module of claim 2, wherein the final power amplifier circuit and the attenuator are connected by a second rf cable.
8. The power calibration system of claim 7, wherein the attenuator and the power detection unit are connected by a third radio frequency cable.
9. A power calibration method for a radio frequency power amplifier module, which is applied to the power calibration system according to any one of claims 1-8, the method comprising:
the signal source provides an excitation signal for the driving stage power amplifier circuit;
the micro-processing unit controls the current detection circuit to collect drain current of the final power amplifier circuit;
the power detection unit collects the output power of the final power amplifier circuit;
acquiring a plurality of drain currents and a plurality of corresponding output powers acquired under a plurality of excitation signals, and determining a functional relation with the drain currents as independent variables and the output powers as dependent variables according to the plurality of drain currents and the plurality of corresponding output powers;
and the micro-processing unit stores the functional relation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010185153.3A CN111239483A (en) | 2020-03-17 | 2020-03-17 | Power calibration system and calibration method of radio frequency power amplifier module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010185153.3A CN111239483A (en) | 2020-03-17 | 2020-03-17 | Power calibration system and calibration method of radio frequency power amplifier module |
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| CN111239483A true CN111239483A (en) | 2020-06-05 |
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| CN202010185153.3A Pending CN111239483A (en) | 2020-03-17 | 2020-03-17 | Power calibration system and calibration method of radio frequency power amplifier module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113517867A (en) * | 2021-04-23 | 2021-10-19 | 广州安波通信科技有限公司 | Microwave amplifier output power detection system, detection chip and detection method |
| CN116192294A (en) * | 2023-04-27 | 2023-05-30 | 南京纳特通信电子有限公司 | Radio frequency output power calibration method, control system, calibration device and storage medium |
| CN117236262A (en) * | 2023-11-15 | 2023-12-15 | 深圳市恒运昌真空技术有限公司 | Analysis method and system for output power amplification coefficient of radio frequency power supply |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113517867A (en) * | 2021-04-23 | 2021-10-19 | 广州安波通信科技有限公司 | Microwave amplifier output power detection system, detection chip and detection method |
| CN116192294A (en) * | 2023-04-27 | 2023-05-30 | 南京纳特通信电子有限公司 | Radio frequency output power calibration method, control system, calibration device and storage medium |
| CN116192294B (en) * | 2023-04-27 | 2023-06-30 | 南京纳特通信电子有限公司 | Radio frequency output power calibration method, control system, calibration device and storage medium |
| CN117236262A (en) * | 2023-11-15 | 2023-12-15 | 深圳市恒运昌真空技术有限公司 | Analysis method and system for output power amplification coefficient of radio frequency power supply |
| CN117236262B (en) * | 2023-11-15 | 2024-03-19 | 深圳市恒运昌真空技术股份有限公司 | Analysis method and system for output power amplification coefficient of radio frequency power supply |
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Application publication date: 20200605 |