Method and system for expanding power measurement range of radio frequency power meter

Abstract

The invention discloses a method and system for expanding the power measurement range of a radio frequency power meter, and relates to the technical field of power measurement, and the method comprises the following steps: obtaining a to-be-measured radio frequency signal, inputting the to-be-measured radio frequency signal into an amplitude limiter to obtain an amplitude limiting signal, inputting the amplitude limiting signal into a first radio frequency switch, dividing the amplitude limiting signal into two signal channels, and outputting the two signal channels, the two signal channels comprise a large signal channel and a small signal channel; and inputting the two paths of signals into a second radio frequency switch for selective output, inputting a radio frequency signal after the second radio frequency switch into a detector, outputting to obtain a detection voltage, and calculating power according to the detection voltage to obtain a power value.

Description

Technical Field

[0001] The present invention relates to the technical field of power measurement, and in particular to a method and a system for expanding the power measurement range of a radio frequency power meter. Background Art

[0002] At present, the mainstream RF power meters in the market are mainly realized by discrete detector tubes or logarithmic detectors. They have a large dynamic range and good linearity, and can measure the minimum signal power of about -65dBm. They are mainly realized by directly detecting the input signal. Because the linear range of the detector tube is limited, its power measurement range will not be too large. However, in occasions with relatively high requirements for power measurement, such as high-precision measurement of small signals, it is insufficient. Although the spectrum analyzer can measure small signals, the measurement accuracy cannot meet the requirements. The existing mainstream power meters can have high measurement accuracy for large signals, but the power measurement coverage of small signals is insufficient. Summary of the invention

[0003] In order to solve the deficiencies mentioned in the above background technology, the purpose of the present invention is to provide a method and system for expanding the power measurement range of an RF power meter, and to indirectly expand the dynamic measurement range of an RF detector by switching large and small signal channels using an RF switch.

[0004] In a first aspect, the purpose of the present invention can be achieved by the following technical solution: a method for expanding the power measurement range of a radio frequency power meter, the method comprising the following steps:

[0005] Acquire a radio frequency signal to be measured, input the radio frequency signal to be measured into a limiter to obtain a limited signal, input the limited signal into a first radio frequency switch to be divided into two signal channels for output, wherein the two signal channels include a large signal channel and a small signal channel;

[0006] The two signals are input into the second RF switch for selection and output, and then the RF signal after the second RF switch is input into the detector, and the detection voltage is outputted. The power is calculated according to the detection voltage to obtain the power value.

[0007] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: when measuring the large signal, the output voltage enters the detector after passing through the limiter, the first RF switch, the attenuator, and the second RF switch in sequence, and the power input to the detector is made to fall within the linear region of the detector through the attenuator.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: when measuring the small signal, the small signal passes through the limiter, the first RF switch, the amplifier, and the second RF switch in sequence and then enters the detector to detect the output voltage, and the power input to the detector is made to fall within the linear region of the detector through the amplifier.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the method also includes: the RF power meter of the RF signal to be measured defaults to a large signal channel when it is powered on or the user sets the frequency, and a frequency is first set. At this time, the detector outputs a voltage as the detection voltage Vdet, and then traverses the calibration storage voltage in the large signal channel measurement area. If Vdet falls within a certain interval of the large signal channel, the power value can be directly measured according to the measurement algorithm.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: if the detection voltage Vdet is smaller than the minimum calibration storage voltage of the large signal channel measurement area, the power of the measured signal must fall in the small signal channel measurement area. At this time, the RF switch needs to be switched to the small signal channel, and the power value is measured in the small signal measurement area according to the measurement algorithm.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the method also includes: when the input frequency and amplitude are calibration frequency points, the power value can be directly calculated based on the detection voltage; if the input frequency is not a calibration point, first determine which two calibration points' frequency interval the input frequency falls within based on the set frequency, then determine which two calibration points' amplitude interval the input frequency falls within based on the current detection voltage, and finally, use quadratic linear interpolation to calculate the voltage value of the current non-calibration point based on the voltage values ​​of the four calibration points before and after, and above and below this non-calibration point, and finally collect, calculate, and display the power value.

[0012] In a second aspect, in order to achieve the above-mentioned object, the present invention discloses a system for expanding the power measurement range of a radio frequency power meter, comprising:

[0013] A signal conversion module, used to obtain a radio frequency signal to be measured, input the radio frequency signal to be measured into a limiter to obtain a limited signal, input the limited signal into a first radio frequency switch to be divided into two signal channels for output, wherein the two signal channels include a large signal channel and a small signal channel;

[0014] The power measurement module inputs two signals into the second RF switch for selection and output, and then inputs the RF signal after the second RF switch into the detector, outputs the detection voltage, calculates the power according to the detection voltage, and obtains the power value.

[0015] In combination with the second aspect, in some implementations of the second aspect, the system further includes: when measuring a large signal in the signal conversion module, the signal is passed through the limiter, the first RF switch, the attenuator, and the second RF switch in sequence before entering the detector to detect the output voltage, and the attenuator is used to make the power input to the detector fall within the linear region of the detector.

[0016] When measuring small signals in the signal conversion module, the signal passes through the limiter, the first RF switch, the amplifier, and the second RF switch in sequence and then enters the detector to detect the output voltage. The amplifier makes the power input to the detector fall into the linear region of the detector.

[0017] When the RF power meter of the RF signal to be measured in the signal conversion module is powered on or the user sets the frequency, it defaults to the large signal channel. First, a frequency is set. At this time, the detector outputs a voltage as the detection voltage Vdet, and then traverses the calibration storage voltage in the large signal channel measurement area. If Vdet falls within a certain interval of the large signal channel, the power value can be directly measured according to the measurement algorithm;

[0018] If the detection voltage Vdet in the power measurement module is smaller than the minimum calibration storage voltage in the large signal channel measurement area, the power of the measured signal must fall in the small signal channel measurement area. At this time, the RF switch needs to be switched to the small signal channel, and the power value is measured in the small signal measurement area according to the measurement algorithm.

[0019] In the power measurement module, when the input frequency and amplitude are the calibration frequency points, the power value can be directly calculated based on the detection voltage. If the input frequency is not the calibration point, first determine which of the two calibration points' frequency intervals the input frequency falls within based on the set frequency, and then determine which of the two calibration points' amplitude intervals the input frequency falls within based on the current detection voltage. Finally, the voltage value of the current non-calibration point is calculated using the quadratic linear interpolation method based on the voltage values ​​of the four calibration points before and after, above and below this non-calibration point. Finally, the power value is collected, calculated, and displayed.

[0020] In another aspect of the present invention, in order to achieve the above-mentioned purpose, a terminal device is disclosed, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the memory stores a computer program capable of running on the processor, and when the processor loads and executes the computer program, a method for expanding the power measurement range of a radio frequency power meter as described above is adopted.

[0021] In another aspect of the present invention, in order to achieve the above-mentioned purpose, a computer-readable storage medium is disclosed, in which a computer program is stored. When the computer program is loaded and executed by a processor, a method for expanding the power measurement range of a radio frequency power meter as described above is adopted.

[0022] Beneficial effects of the present invention:

[0023] The present invention expands the power measurement range of the radio frequency power meter by multi-channeling the radio frequency input signal, effectively solves the problem that the radio frequency power meter cannot measure small signals with high precision, and enriches the measurement application scenarios of the radio frequency power meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a schematic flow chart of the method of the present invention;

[0026] Figure 2 It is a principle block diagram of the direct power meter solution of the present invention;

[0027] Figure 3 It is a principle block diagram of the multi-channel radio frequency power meter solution of the present invention;

[0028] Figure 4 is a connection diagram for calibration of the power meter of the present invention;

[0029] Figure 5 is a flow chart of power meter calibration of the present invention;

[0030] Figure 6 It is a schematic diagram of the system structure of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1:

[0033] The following is an introduction to the relevant terms involved in the embodiments of the present application:

[0034] RF power meter: RF power meter is a high-performance portable ultra-high frequency power meter designed for measuring various complex waveforms. It is used for testing digital communication signals such as GSM / CDMA / PHS, effectively solving the power and amplitude measurement problems of complex waveforms, and greatly improving the usability and reliability of the meter. In terms of operation method and display style, a humanized design concept is used to try to meet the user's operating habits. RF power meter is inexpensive, reducing the dependence on expensive test equipment, and is suitable for measurement and maintenance in various wireless communication industries.

[0035] Linear interpolation: Linear interpolation is an interpolation method in which the interpolation function is a first-order polynomial. The interpolation error at the interpolation node is zero. Compared with other interpolation methods such as parabolic interpolation, linear interpolation is simple and convenient. The geometric meaning of linear interpolation is to use a straight line passing through two known points to approximate the original function. It can be used to approximate the original function, and can also be used to calculate the value that is not in the table during the table lookup process.

[0036] like Figure 1 As shown, a method for extending the power measurement range of a radio frequency power meter comprises the following steps:

[0037] S101: Acquire a radio frequency signal to be measured, input the radio frequency signal to be measured into a limiter to obtain a limited signal, input the limited signal into a first radio frequency switch to be divided into two signal channels for output, wherein the two signal channels include a large signal channel and a small signal channel;

[0038] When measuring a large signal, the measured signal passes through the limiter, the two-choice RF switch 1 (the first RF switch), the attenuator, the two-choice RF switch 2 (the second RF switch) in sequence, and then enters the detector to detect the output voltage. The function of the attenuator is to make the power input to the detector fall into the linear region of the detector to improve the detection accuracy.

[0039] When measuring small signals, the measured signal passes through the limiter, the two-choice RF switch 1 (the first RF switch), the amplifier, the two-choice RF switch 2 (the second RF switch) in sequence, and then enters the detector to detect the output voltage.

[0040] The function of the amplifier is also to make the power input to the detector fall within the linear region of the detector to improve the detection accuracy. Therefore, if a detector with a fixed dynamic range uses conventional methods, the measured signal is directly detected when it comes in, and the dynamic range of the measured signal depends on the dynamic range of the detector. If this method is used, the two-channel method of large and small signals can increase the dynamic range of the measured signal exponentially, especially enhancing the ability of the RF power meter to measure small signals with high precision.

[0041] Specifically, the present invention is further described below by way of embodiments:

[0042] Take a positive slope detector with a linear region of -60dBm to 0dBm and a dynamic range of 60dB as an example, that is, when the input power increases, the detection output voltage increases linearly; if the conventional method is used, the measured signal comes in and is directly detected, and the detector can only measure RF signals of -60dBm to 0dBm, but using this method, the measurement dynamic range can be greatly improved, and a power measurement range of -100dBm to +20dBm can be achieved. The specific implementation method is: the large signal channel attenuates the RF signal of -40dBm to +20dBm to -60dBm to 0dBm through 20dB attenuation, so that it falls within the linear region of the detector tube; the low-power channel amplifies the RF signal of -100dBm to -40dBm to -60dBm to 0dBm through a secondary 40dB gain amplification, also making it fall within the linear region of the detector tube. In this way, the RF power meter realizes power measurement with an RF input power range of -100dBm to +20dBm and a dynamic range of 120dB.

[0043] When the RF power meter is powered on or the user sets the frequency, the default is the large signal channel (-40dBm ~ +20dBm). When the user uses the power meter to measure, first set a frequency. At this time, the detector outputs a voltage Vdet, and then traverses the calibration storage voltage in the large signal channel measurement area. If Vdet falls within a certain interval of the large signal channel, its power value can be directly measured according to the measurement algorithm; if the detected voltage Vdet is smaller than the minimum calibration storage voltage in the large signal channel measurement area, the power of the measured signal must fall in the small signal channel measurement area. At this time, the RF switch needs to be switched to the small signal channel, and its power value is measured in the small signal measurement area according to the measurement algorithm. The purpose of this is to protect the RF amplifier of the small power channel (-100dBm ~ -40dBm) to prevent the input signal from being too large and causing it to burn out; when the user re-enters another frequency, the RF switch will switch to the large signal channel again, and the above process will be repeated.

[0044] S102: inputting two signals into the second RF switch for selection and output, then inputting the RF signal after the second RF switch into the detector, outputting a detection voltage, calculating the power according to the detection voltage, and obtaining a power value.

[0045] The power value is measured according to the following algorithm: It should be noted that the RF power meter needs high-precision calibration before leaving the factory. When the input frequency and amplitude are the calibration frequency points, the power value can be directly calculated based on the detection voltage. If the input frequency is not a calibration point, first determine which two calibration points the frequency range falls in based on the set frequency, and then determine which two calibration points the amplitude range falls in based on the current detection voltage. Finally, the voltage value of the current non-calibration point is calculated based on the voltage values ​​of the four calibration points before and after this non-calibration point and above and below (the voltage values ​​of the four calibration points are calibration values, the voltages are known and stored in ARM), and finally collected, calculated and displayed.

[0046] The control unit is mainly responsible for the selection and setting of the RF switch, as well as the collection, calculation and display of the detection voltage.

[0047] The built-in temperature sensor can perform temperature compensation on the measured power, further improving the accuracy of power measurement.

[0048] Calibration of power meter: This solution implements a RF power meter with a frequency coverage of 1MHz to 18GHz and a power measurement range of -100dBm to +20dBm. The calibration steps are as follows.

[0049] ①Calibration connection as follows Figure 4 As shown,

[0050] ②Calibration point selection basis:

[0051] The power meter calibration is divided into two channels, large and small signals. First, the power of the large signal channel (-40dBm ~ +20dBm) is divided into 7 gears, with a power of 10dB per gear and a frequency point every 50M; the small signal channel (-100dBm ~ -40dBm) is also divided into 7 gears, with a power of 10dB per gear and a frequency point every 50M. A calibration network table is formed, and the voltage value of this calibration point is stored in ARM, which is called in the subsequent calculation of the measured power value. Note that the -40dBm gear needs to be calibrated twice, that is, once for the large signal channel and once for the small signal channel.

[0052]

[0053] Table 1 Multi-channel RF power meter calibration point list

[0054] ③Calibration process:

[0055] The PC sends a calibration command to the signal source to output the frequency and amplitude. At the same time, the power meter switches to the large signal channel, starts with the large signal channel, and then calibrates the small power channel. The order of the calibration points is completed in sequence according to the points listed in Table 1. All calibrated voltage values ​​are then stored as a reference for subsequent calculations.

[0056] Embodiment 2: In the second aspect, as Figure 6 As shown, in order to achieve the above-mentioned purpose, the present invention discloses a system for expanding the power measurement range of a radio frequency power meter, comprising:

[0057] The signal conversion module 11 is used to obtain the radio frequency signal to be measured, input the radio frequency signal to be measured into a limiter to obtain a limited signal, input the limited signal into a first radio frequency switch to be divided into two signal channels for output, and the two signal channels include a large signal channel and a small signal channel;

[0058] The power measurement module 12 inputs the two signals into the second RF switch for selection and output, then inputs the RF signal after the second RF switch into the detector, outputs a detection voltage, calculates the power according to the detection voltage, and obtains the power value.

[0059] In combination with the second aspect, in some implementations of the second aspect, the system further includes: when measuring a large signal in the signal conversion module 11, the signal is sequentially passed through a limiter, a first RF switch, an attenuator, and a second RF switch before entering a detector to detect an output voltage, and the attenuator is used to make the power input to the detector fall within the linear region of the detector.

[0060] When measuring a small signal in the signal conversion module 11, it passes through the limiter, the first RF switch, the amplifier, and the second RF switch in sequence and then enters the detector to detect the output voltage. The amplifier makes the power input to the detector fall into the linear region of the detector.

[0061] When the RF power meter of the RF signal to be measured in the signal conversion module 11 is powered on or the user sets the frequency, it defaults to the large signal channel. First, a frequency is set. At this time, the detector outputs a voltage as the detection voltage Vdet, and then traverses the calibration storage voltage in the large signal channel measurement area. If Vdet falls within a certain interval of the large signal channel, the power value can be directly measured according to the measurement algorithm;

[0062] If the detection voltage Vdet in the power measurement module 12 is smaller than the minimum calibration storage voltage in the large signal channel measurement area, the power of the measured signal must fall in the small signal channel measurement area. At this time, the RF switch needs to be switched to the small signal channel, and the power value is measured in the small signal measurement area according to the measurement algorithm;

[0063] In the power measurement module 12, when the input frequency and amplitude are the calibration frequency points, the power value can be directly calculated based on the detection voltage. If the input frequency is not the calibration point, first determine which two calibration points the frequency range falls in based on the set frequency, and then determine which two calibration points the amplitude range falls in based on the current detection voltage. Finally, the voltage value of the current non-calibration point is calculated using the quadratic linear interpolation method based on the voltage values ​​of the four calibration points before and after, above and below this non-calibration point. Finally, the power value is collected, calculated, and displayed.

[0064] Based on the same inventive concept, the present invention also provides a computer device, which includes: one or more processors, and a memory for storing one or more computer programs; the program includes program instructions, and the processor is used to execute the program instructions stored in the memory. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is used to implement one or more instructions, specifically for loading and executing one or more instructions in a computer storage medium to implement the above method.

[0065] It needs to be further explained that, based on the same inventive concept, the present invention also provides a computer storage medium, on which a computer program is stored, and the computer program is executed by a processor to execute the above method. The storage medium can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electrical, magnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] The above shows and describes the basic principles, main features and advantages of the present disclosure. Those skilled in the art should understand that the present disclosure is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, the present disclosure may have various changes and improvements, and these changes and improvements fall within the scope of the present disclosure to be protected.

Claims

1. A method for expanding the power measurement range of a radio frequency power meter, characterized in that: The method comprises the following steps: Acquire a radio frequency signal to be measured, input the radio frequency signal to be measured into a limiter to obtain a limited signal, input the limited signal into a first radio frequency switch to be divided into two signal channels for output, wherein the two signal channels include a large signal channel and a small signal channel; The two signals are input into the second RF switch for selection and output, and then the RF signal after the second RF switch is input into the detector, and the detection voltage is outputted. The power is calculated according to the detection voltage to obtain the power value.

2. A method for expanding the power measurement range of a radio frequency power meter according to claim 1, characterized in that: When the large signal is measured, it passes through the limiter, the first RF switch, the attenuator, and the second RF switch in sequence and then enters the detector to detect the output voltage. The attenuator makes the power input to the detector fall into the linear region of the detector.

3. The method for expanding the power measurement range of a radio frequency power meter according to claim 1, characterized in that: When the small signal is measured, it passes through the limiter, the first RF switch, the amplifier, and the second RF switch in sequence and then enters the detector to detect the output voltage. The amplifier makes the power input to the detector fall into the linear region of the detector.

4. The method for expanding the power measurement range of a radio frequency power meter according to claim 1, characterized in that: The RF power meter of the RF signal to be measured defaults to the large signal channel when it is powered on or the user sets the frequency. First, a frequency is set. At this time, the detector outputs a voltage as the detection voltage Vdet, and then traverses the calibration storage voltage in the large signal channel measurement area. If Vdet falls within a certain interval of the large signal channel, the power value can be directly measured according to the measurement algorithm.

5. A method for expanding the power measurement range of a radio frequency power meter according to claim 4, characterized in that: If the detection voltage Vdet is smaller than the minimum calibration storage voltage in the large signal channel measurement area, the power of the measured signal must fall in the small signal channel measurement area. At this time, the RF switch needs to be switched to the small signal channel and the power value is measured in the small signal measurement area according to the measurement algorithm.

6. A method for expanding the power measurement range of a radio frequency power meter according to claim 5, characterized in that: When the input frequency and amplitude are the calibration frequency points, the power value can be directly calculated based on the detection voltage. If the input frequency is not the calibration point, first determine which of the two calibration points' frequency intervals the input frequency falls within based on the set frequency, and then determine which of the two calibration points' amplitude intervals the input frequency falls within based on the current detection voltage. Finally, use the quadratic linear interpolation method to calculate the voltage value of the current non-calibration point based on the voltage values ​​of the four calibration points before, after, above, and below this non-calibration point. Finally, collect, calculate, and display the power value.

7. A system for extending the power measurement range of a radio frequency power meter, characterized in that: include: A signal conversion module, used to obtain a radio frequency signal to be measured, input the radio frequency signal to be measured into a limiter to obtain a limited signal, input the limited signal into a first radio frequency switch to be divided into two signal channels for output, wherein the two signal channels include a large signal channel and a small signal channel; The power measurement module inputs two signals into the second RF switch for selection and output, and then inputs the RF signal after the second RF switch into the detector, outputs the detection voltage, calculates the power according to the detection voltage, and obtains the power value.

8. The system for extending the power measurement range of a radio frequency power meter according to claim 7, characterized in that: When measuring a large signal in the signal conversion module, the signal passes through the limiter, the first RF switch, the attenuator, and the second RF switch in sequence before entering the detector to detect the output voltage. The attenuator makes the power input to the detector fall within the linear region of the detector. When measuring small signals in the signal conversion module, the signal passes through the limiter, the first RF switch, the amplifier, and the second RF switch in sequence and then enters the detector to detect the output voltage. The amplifier makes the power input to the detector fall into the linear region of the detector. When the RF power meter of the RF signal to be measured in the signal conversion module is powered on or the user sets the frequency, it defaults to the large signal channel. First, a frequency is set. At this time, the detector outputs a voltage as the detection voltage Vdet, and then traverses the calibration storage voltage in the large signal channel measurement area. If Vdet falls within a certain interval of the large signal channel, the power value can be directly measured according to the measurement algorithm; If the detection voltage Vdet in the power measurement module is smaller than the minimum calibration storage voltage in the large signal channel measurement area, the power of the measured signal must fall in the small signal channel measurement area. At this time, the RF switch needs to be switched to the small signal channel, and the power value is measured in the small signal measurement area according to the measurement algorithm. In the power measurement module, when the input frequency and amplitude are the calibration frequency points, the power value can be directly calculated based on the detection voltage. If the input frequency is not the calibration point, first determine which of the two calibration points' frequency intervals the input frequency falls within based on the set frequency, and then determine which of the two calibration points' amplitude intervals the input frequency falls within based on the current detection voltage. Finally, the voltage value of the current non-calibration point is calculated using the quadratic linear interpolation method based on the voltage values ​​of the four calibration points before and after, above and below this non-calibration point. Finally, the power value is collected, calculated, and displayed.

9. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that: The memory stores a computer program that can be run on the processor. When the processor loads and executes the computer program, a method for expanding the power measurement range of a radio frequency power meter according to any one of claims 1 to 6 is adopted.

10. A computer-readable storage medium having a computer program stored therein, characterized in that: When the computer program is loaded and executed by the processor, a method for expanding the power measurement range of a radio frequency power meter as described in any one of claims 1 to 6 is adopted.

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