Radio frequency simulator channel consistency calibration method and system

Abstract

The invention discloses a radio frequency simulator channel consistency calibration method and system, and belongs to the technical field of radio frequency emulation.The method comprises the steps that radio frequency signals output by all channels of a radio frequency simulator are obtained, and the obtained radio frequency signals comprise radio frequency signals with different frequencies and attenuated through different attenuation values; and performing single-channel phase consistency calibration and dual-channel amplitude phase consistency calibration according to the obtained radio frequency signal. Through full-automatic measurement processing and compensation, the influence of phase jitter on a radio frequency simulation experiment is eliminated, an actual simulation scene is combined, errors and errors caused by manual operation processing are avoided, manpower consumption is reduced, the measurement time is shortened, and the measurement efficiency is improved. The time of one day spent on full-manual calibration or one day spent on semi-manual calibration can be shortened to be within one hour spent on full-automatic calibration, so that the calibration efficiency is improved; and the method is suitable for various actual simulation scenes, and is suitable for multi-channel, broadband and other conditions under various conditions.

Description

Technical Field

[0001] The invention relates to a method and system for calibrating the channel consistency of a radio frequency simulator, and belongs to the technical field of radio frequency simulation. Background Art

[0002] As a high-frequency, fast-propagation, and difficult-to-capture information carrier, it is particularly important to collect, analyze, and send RF signals. As an instrument that generates RF signals, RF simulation equipment has increasingly higher performance requirements. At present, RF simulation technology with single functions and unstable amplitude and phase can no longer meet current needs. High-performance RF simulation technology with stable amplitude and phase has emerged. With different test scenarios, the requirements for the amplitude and phase consistency of RF simulator channels are becoming higher and higher. For example, in a digital semi-physical simulation darkroom, various signals need to be simulated, and the amplitude and phase of RF signals between channels are required to remain basically consistent. The traditional method is to use instruments such as spectrum analyzers, oscilloscopes, and vector network analyzers to obtain the corresponding amplitude values, phase values, etc. in real time each time, and then obtain the corresponding table according to the specified calculation method and storage method, so the traditional method still has the problem of low efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a method and system for calibrating the channel consistency of a radio frequency simulator to solve the problem of low efficiency in the prior art.

[0004] To achieve the above objectives, the present invention is implemented by adopting the following technical solutions: In a first aspect, the present invention provides a method for calibrating channel consistency of a radio frequency simulator, comprising: Acquire the RF signals output by all channels of the RF simulator, including RF signals of different frequencies and attenuated by different attenuation values, and perform single-channel phase consistency calibration and dual-channel amplitude and phase consistency calibration according to the acquired RF signals; The single-channel phase consistency calibration comprises: inputting the radio frequency signal of any channel into a vector network analyzer whose working mode is a difference mode, calculating the original phase value and the original amplitude value of the radio frequency signal and calculating the original amplitude and phase value table of the channel accordingly, calculating the phase difference table of the channel according to the original amplitude and phase value table, polling and calculating the phase difference tables of all channels, and compensating the phase of the radio frequency signal in the channel according to the phase difference table corresponding to the channel; The dual-channel amplitude and phase consistency calibration includes: taking any two channels as a combination, inputting the radio frequency signals of the two channels in any combination into a vector network analyzer whose working mode is a ratio mode, calculating the amplitude difference and phase difference between the two radio frequency signals of the combination and calculating the amplitude and phase difference table of the combination accordingly, polling and calculating the amplitude and phase difference tables of all combinations, and compensating the amplitude and phase of the radio frequency signals of the two channels in the combination according to the amplitude and phase difference tables corresponding to the combination.

[0005] Furthermore, the radio frequency signals with different frequencies and attenuated by different attenuation values ​​include: The RF signal is obtained by sequentially changing the output signal of the RF simulator according to a preset attenuation value, and the RF signal is obtained by sequentially changing the output signal of the RF simulator according to a preset frequency step.

[0006] Further, the calculating the original phase value and the original amplitude value of the radio frequency signal includes: The amplitude value trajectory and phase value trajectory of the RF signal are established, the amplitude value trajectory is marked according to the amplitude characteristics to obtain the original amplitude value of the RF signal, and the phase value trajectory is marked according to the phase characteristics to obtain the original phase value of the RF signal.

[0007] Further, the calculating of the original phase value and the original amplitude value of the radio frequency signal and the calculation of the original amplitude and phase value table of the channel accordingly includes: The original phase value and the original amplitude value of the RF signal are calculated, and the original phase value and the original amplitude value of the RF signal are stored in a blank table in the format of channel number-frequency-attenuation value-original amplitude value-original phase value to obtain the original amplitude and phase value table of the RF signal.

[0008] Further, the phase difference table of the channel is calculated according to the original amplitude and phase value table, including: Subtract the phase corresponding to a certain frequency and a certain attenuation value in the original amplitude-phase table from the phase of the frequency when there is no attenuation value, and get the phase difference value caused by the attenuation of the RF signal at the frequency and the attenuation value. Poll all frequencies and attenuation values ​​to get the phase difference value caused by the attenuation of the RF signal at all frequencies and different attenuation values. Store the phase difference value in a blank table in the format of frequency-attenuation value-phase difference value to get the phase difference table of the channel.

[0009] Further, compensating the phase of the radio frequency signal in the channel according to the phase difference table corresponding to the channel includes: The phase difference values ​​corresponding to the RF signals with different frequencies and attenuated by different attenuation values ​​are found from the phase difference table, and the phase difference values ​​are added when controlling the phase of the RF signal to complete the phase compensation of the RF signal in the channel.

[0010] Further, the calculating of the amplitude difference and the phase difference between the two RF signals of the combination includes: The amplitude value trajectory and phase value trajectory of the two RF signals are established, the amplitude value trajectory is marked according to the amplitude characteristics to obtain the amplitude difference between the two RF signals, and the phase value trajectory is marked according to the phase characteristics to obtain the phase difference between the two RF signals.

[0011] Further, the step of calculating the amplitude difference and phase difference between the two RF signals of the combination and calculating an amplitude and phase difference table of the combination accordingly includes: The amplitude difference and phase difference between the two RF signals of the combination are calculated, and the amplitude difference and phase difference between the two RF signals are stored in a blank table in the format of two channel numbers-frequency-attenuation value-amplitude difference-phase difference value to obtain an amplitude-phase difference table of the combination.

[0012] Further, the compensating the amplitude and phase of the radio frequency signals of the two channels in the combination according to the amplitude and phase difference table corresponding to the combination includes: Find the amplitude difference and phase difference corresponding to the RF signals of different frequencies and attenuated by different attenuation values ​​from the amplitude-phase difference table, add the amplitude difference when controlling the amplitude of the RF signal, and add the phase difference when controlling the phase of the RF signal to complete the compensation of the amplitude and phase of the RF signals of the two channels in the combination.

[0013] In a second aspect, the present invention provides a radio frequency simulator channel consistency calibration system, including a radio frequency simulator, a vector network analyzer, a network device and a control terminal; The network device is used to confine the RF simulator, vector network analyzer and control end within a local area network. The RF simulator, vector network analyzer and control end communicate within the local area network. The output end of the RF simulator is connected to the input end of the vector network analyzer. The output end of the vector network analyzer is respectively connected to the input end of the RF simulator and the control end. The control end and the vector network analyzer jointly execute any one of the methods described in the first aspect.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: The present invention provides a method and system for calibrating the channel consistency of a radio frequency simulator. Through the fully automatic measurement processing and compensation defined by the method, the influence of phase jitter on the radio frequency simulation experiment can be effectively eliminated, the requirements of the radio frequency simulation experiment can be met, and in combination with the actual simulation scenario, the mistakes and errors caused by human operation can be avoided, the consumption of manpower can be reduced, the measurement time can be shortened, and the time taken for full manual calibration, which takes one day or half manual calibration, can be shortened to within one hour of fully automatic calibration, thereby improving the calibration efficiency. The system is suitable for various actual simulation scenarios, and is suitable for multi-channel, wide-band and other conditions under various conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a flow chart of a method for calibrating channel consistency of a radio frequency simulator provided by an embodiment of the present invention; Figure 2 is a schematic diagram of a radio frequency simulator channel consistency calibration system provided by an embodiment of the present invention; Figure 3 This is the amplitude and phase variation trend diagram caused by 2500MHz attenuation of the single-channel H branch of the RF simulator before calibration; Figure 4 This is the amplitude and phase variation trend diagram caused by 9000MHz attenuation of the single-channel H branch of the RF simulator before calibration; Figure 5 This is the amplitude and phase variation trend diagram caused by the 17500MHz attenuation of the single-channel H branch of the RF simulator before calibration; Figure 6 This is the amplitude and phase variation trend diagram caused by 2500MHz attenuation of the single-channel V branch of the RF simulator before calibration; Figure 7 This is the amplitude and phase variation trend diagram caused by 9000MHz attenuation of the single-channel V branch of the RF simulator before calibration; Figure 8 This is the trend diagram of amplitude and phase changes caused by 17500MHz attenuation of the single-channel V branch of the RF simulator before calibration; Fig. 9 This is the amplitude and phase change trend diagram caused by the frequency change of 2000MHz~18000MHz of the two-channel H / V branch of the RF simulator before calibration; Fig.10 This is the amplitude and phase variation trend diagram caused by 2500MHz attenuation of the single-channel H branch of the RF simulator before calibration; Fig.11 This is the amplitude and phase variation trend diagram caused by 9000MHz attenuation of the single-channel H branch of the RF simulator before calibration; Fig.12This is the amplitude and phase variation trend diagram caused by the 17500MHz attenuation of the single-channel H branch of the RF simulator before calibration; Fig.13 This is the amplitude and phase variation trend diagram caused by 2500MHz attenuation of the single-channel V branch of the RF simulator before calibration; Fig.14 This is the amplitude and phase variation trend diagram caused by 9000MHz attenuation of the single-channel V branch of the RF simulator before calibration; Fig.15 This is the trend diagram of amplitude and phase changes caused by 17500MHz attenuation of the single-channel V branch of the RF simulator before calibration; Fig.16 This is the amplitude and phase change trend diagram caused by the frequency change of 2000MHz~18000MHz of the two-channel H / V branch of the RF simulator before calibration. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the protection scope of the present invention.

[0017] Example 1.

[0018] like Figure 1 As shown, the present invention provides a method for calibrating channel consistency of a radio frequency simulator, comprising: Acquire the RF signals output by all channels of the RF simulator, including RF signals of different frequencies and attenuated by different attenuation values, and perform single-channel phase consistency calibration and dual-channel amplitude and phase consistency calibration according to the acquired RF signals; Single-channel phase consistency calibration includes: inputting the RF signal of any channel into a vector network analyzer whose working mode is the difference mode, calculating the original phase value and original amplitude value of the RF signal and calculating the original amplitude and phase value table of the channel accordingly, calculating the phase difference table of the channel according to the original amplitude and phase value table, polling and calculating the phase difference tables of all channels, and compensating the phase of the RF signal in the channel according to the phase difference table corresponding to the channel; The dual-channel amplitude and phase consistency calibration includes: taking any two channels as a combination, inputting the RF signals of the two channels in any combination into a vector network analyzer whose working mode is the ratio mode respectively, calculating the amplitude difference and phase difference between the two RF signals of the combination and calculating the amplitude and phase difference table of the combination accordingly, polling and calculating the amplitude and phase difference tables of all combinations, and compensating the amplitude and phase of the RF signals of the two channels in the combination according to the amplitude and phase difference tables corresponding to the combination.

[0019] The fully automatic measurement processing and compensation defined by the method of the present invention can effectively eliminate the influence of phase jitter on the radio frequency simulation experiment, meet the requirements of the radio frequency simulation experiment, and combined with the actual simulation scenario, avoid the mistakes and errors caused by human operation, reduce manpower consumption, shorten the measurement time, and can shorten the time of one day for full manual calibration or one day for semi-manual calibration to within one hour for fully automatic calibration, thereby improving the calibration efficiency; and the present invention is suitable for various actual simulation scenarios, and is suitable for multi-channel, wide-band and other conditions under various conditions.

[0020] Example 2.

[0021] The present invention provides a method for calibrating the channel consistency of a radio frequency simulator, and the specific implementation thereof includes the following steps 1 to 5.

[0022] The method provided in this embodiment is implemented based on a radio frequency simulator channel consistency calibration and compensation system, which includes a radio frequency simulator, a vector network analyzer, a network device and a control terminal.

[0023] The control end can control the RF simulator and vector network analyzer, set the address of the RF simulator, select the corresponding channel, set the input power, start and end frequency and step of the RF simulator, control the working status of the RF simulator, set the address of the vector network analyzer, select the working mode, and click the connect vector network button to complete the working parameters of the vector network analyzer, including scanning points, bandwidth, trajectory settings and markings.

[0024] The vector network analyzer is used to input signals with specific characteristics to the RF simulator, receive RF signals output by the RF simulator, and analyze and display RF signal characteristic information. The network device can be a switch or a router, which is used to network the vector network analyzer, RF simulator, and control terminal so that they can communicate and transmit data through the network communication protocol.

[0025] The control end can control the vector network analyzer through the network protocol and the API interface of the vector network analyzer, and obtain the RF signal information analyzed by the vector network analyzer by calling the API interface. In addition, the control end communicates with the RF simulator through the network protocol to control the operating frequency and attenuation value of the RF simulator and other parameters, and can change the control parameters in real time. Changes in input parameters will cause the characteristics of the output signal of the RF simulator.

[0026] For single-channel phase calibration, the effect to be achieved is that when the frequency is fixed, by changing the input power parameter, the phase of the RF signal output by the RF simulator should be kept in a relatively stable range. For example, when the input parameter frequency is 2500MHz and the output power is 0dBm, the output phase is 112.123°. When the output power is changed, that is, the output power is attenuated, when the attenuation is 10dB, the phase of the output RF signal should be within the range of 112.123°±1°. When other parameters are changed, the phase stability should also be maintained to achieve this effect.

[0027] For multi-channel amplitude phase calibration, when the frequency is fixed, by changing the input power parameters, the output phase and amplitude difference of the two RF signals output by the RF simulator is close to 0. For example, when the input parameter frequency is 2500MHz and the output power is 0dBm, the output phase is 0.234° and the amplitude difference is 0.345dB. When the frequency is changed, the phase difference of the output RF signal should be within the range of 0°±1°, and the amplitude difference of the output RF signal should be within the range of 0dB±2dB. When other parameters change, the phase should also be kept stable to achieve this effect.

[0028] Step 1: Build a network.

[0029] The RF simulator, vector network analyzer, and control terminal are all connected to the switch through an Ethernet control cable. For single-channel phase calibration, port 1 of the vector network analyzer is connected to a channel input of the RF simulator, and the corresponding output of the RF simulator is connected to port 2 of the vector network analyzer. The working parameters of the vector network analyzer are controlled through the control terminal. For multi-channel calibration, the source end of the vector network analyzer can be divided into multiple channels through a power divider and connected to the input end of the RF simulator. The corresponding output ends of the RF simulator are respectively connected to ports 1 and 2 of the vector network analyzer, and the working parameters of the vector network analyzer are controlled through the control terminal.

[0030] Among them, source indicates the source end.

[0031] Step 2: Parameter setting.

[0032] For single-channel phase consistency calibration, the control end selects the IP address of the RF simulator, the channel number corresponding to the multi-channel, the address of the vector network analyzer, the working mode is S21, the output frequency and power, sets the frequency range and frequency step to be calibrated, and clicks Start Test to automatically control the relevant parameters of the RF simulator and vector network analyzer. For multi-channel amplitude and phase consistency calibration, the control end selects the IP address of the RF simulator, the channel number corresponding to the multi-channel, the address of the vector network analyzer, the working mode is A / B, the output frequency and power, sets the frequency range and frequency step to be calibrated, and clicks Start Test to automatically control the relevant parameters of the RF simulator and vector network analyzer.

[0033] Step 3: Data collection.

[0034] Corresponding to single-channel calibration or multi-channel calibration, the RF signal output by the RF simulator is input into the vector network analyzer for acquisition.

[0035] Step 4: Data processing. Step 4 is mainly performed by a vector network analyzer.

[0036] The data processing in single-channel phase consistency calibration includes the following steps: Get the RF signal output by each channel of the RF simulator.

[0037] Connect the RF signal to the input port of the vector network analyzer, set the working frequency of the vector network analyzer, and set the working mode of the vector network analyzer to the difference mode.

[0038] Analyze the amplitude and phase of the RF signal: establish an amplitude value trajectory and a phase value trajectory, mark the amplitude value trajectory according to the amplitude characteristics to obtain the original amplitude value of the RF signal, and mark the phase value trajectory according to the phase characteristics to obtain the original phase value of the RF signal.

[0039] The RF signal output by the RF simulator is changed in sequence according to the 1dB attenuation value. According to the above analysis steps, the original amplitude value and original phase value of the RF signal with an attenuation range of 0dB to 100dB at each frequency point can be obtained; The RF signal output by the RF simulator is changed in 100 MHz frequency steps. The original amplitude value and the original phase value of the RF signal in the frequency range of 2 GHz to 18 GHz can be obtained according to the above analysis steps. By switching the channels in sequence, the original amplitude value and original phase value of the RF signal in each channel with a frequency range of 2GHz~18GHz and an attenuation range of 0dB~100dB can be obtained.

[0040] The original phase value and original amplitude value of the radio frequency signal are stored in a blank table in the format of channel number-frequency-attenuation value-original amplitude value-original phase value to obtain an original amplitude and phase value table of the radio frequency signal.

[0041] Subtract the phase corresponding to a certain frequency and a certain attenuation value in the original amplitude-phase table from the phase of the frequency when there is no attenuation value, and get the phase difference value caused by the attenuation of the RF signal at the frequency and the attenuation value. Poll all frequencies and attenuation values ​​to get the phase difference value caused by the attenuation of the RF signal at all frequencies and different attenuation values. Store the phase difference value in a blank table in the format of frequency-attenuation value-phase difference value to get the phase difference table of the channel.

[0042] The data processing in the dual-channel amplitude and phase consistency calibration includes the following steps: Get the RF signals output by any two channels of the RF simulator.

[0043] Connect two RF signals to two input ports of the vector network analyzer respectively, set the working frequency of the vector network analyzer, and set the working mode of the vector network analyzer to the ratio mode.

[0044] Analyze the amplitude and phase of the two RF signals: establish the amplitude value trajectory and phase value trajectory of the two RF signals, mark the amplitude value trajectory according to the amplitude characteristics to obtain the amplitude difference between the two RF signals, and mark the phase value trajectory according to the phase characteristics to obtain the phase difference between the two RF signals.

[0045] The RF signals output by the two channels of the RF simulator are changed in sequence according to the 1dB attenuation value. According to the above analysis steps, the amplitude difference and phase difference of the RF signals with the attenuation range of 0dB to 100dB at the specified frequency points of the two channels can be obtained; The RF signals output by the two channels of the RF simulator are changed in sequence according to the 100 MHz frequency step. According to the above analysis steps, the amplitude difference and phase difference of the two channel RF signals with a frequency range of 2 GHz to 18 GHz can be obtained; By switching the channels in pairs in sequence, the amplitude difference and phase difference of the RF signals in the frequency range of the two channels is 2 GHz to 18 GHz and the attenuation range is 0 dB to 100 dB.

[0046] Calculate the amplitude difference and phase difference between the two RF signals of the combination (the combination of two channels), store the amplitude difference and phase difference between the two RF signals in a blank table in the format of two channel numbers-frequency-attenuation value-amplitude difference-phase difference, and obtain the amplitude and phase difference table of the combination.

[0047] The above data processing process can be summarized as follows: For single-channel calibration, the signal collected and analyzed by the vector network analyzer can obtain the original amplitude value and original phase value of the signal respectively. The control end controls the vector network analyzer to store the original amplitude value and original phase value of the signal in the original amplitude-phase table according to the frequency-attenuation value-amplitude value-phase value. Because the phase value caused by attenuation must be within the controllable range, the phase value when there is no attenuation is used as the reference value, the attenuation value is changed, and the phase value is obtained. The reference value is subtracted from the phase value to know the phase change value caused by the attenuation, and the frequency-attenuation value-phase difference is stored. A table is stored for each frequency point, and there are as many tables as there are frequency points. For multi-channel calibration, the signal collected and analyzed by the vector network analyzer can obtain the amplitude difference and phase difference of the output signals of the two channels respectively, and store them in the format of frequency-phase difference-amplitude difference, and a table is stored for all frequencies.

[0048] Step 5: Data compensation.

[0049] For a single channel, when controlling the RF signal source, find the phase difference of the current point parameter from the table for the frequency point according to the currently controlled frequency point and attenuation value, add the difference when controlling the phase, and you can see that the output signal phase change range is very small. For multi-channels, according to the currently controlled multi-channel selection and frequency point, according to the multi-channel control matrix, add the amplitude difference when controlling the amplitude, and add the phase difference when controlling the phase, and you can see that the amplitude and phase of the output signal are relatively stable.

[0050] In order to verify the technical effect of the present invention, it is provided Figures 3 to 16 To prove it.

[0051] Figure 3 and Fig.10 The H single-channel operating frequency of the RF simulator is 2500MHz before and after calibration. The attenuation changes from 0dB to 100dB. The amplitude and phase change trend diagrams show that the attenuation is from 0dB to 100dB. Fig.10 The changing trend is obviously very gentle and is significantly improved in the linear region.

[0052] Figure 4 and Fig.11 The H single-channel operating frequency of the RF simulator is 9000MHz before and after calibration, and the attenuation changes from 0dB to 100dB. It can be seen that Fig.10 The changing trend is obviously very gentle and is significantly improved in the linear region.

[0053] Figure 5 and Fig.12The H single-channel operating frequency of the RF simulator before and after calibration is 17500MHz, and the attenuation changes from 0dB to 100dB. It can be seen that Fig.10 The changing trend is obviously very gentle and is significantly improved in the linear region.

[0054] Figure 6 and Fig.13 The V single-channel operating frequency of the RF simulator is 2500MHz before and after calibration, and the attenuation changes from 0dB to 100dB. It can be seen that Fig.10 The changing trend is obviously very gentle and is significantly improved in the linear region.

[0055] Figure 7 and Fig.14 The V single-channel operating frequency of the RF simulator is 9000MHz before and after calibration, and the attenuation changes from 0dB to 100dB. It can be seen that Fig.10 The changing trend is obviously very gentle and is significantly improved in the linear region.

[0056] Figure 8 and Fig.15 The V single-channel operating frequency of the RF simulator is 17500MHz before and after calibration. The attenuation changes from 0dB to 100dB. The amplitude and phase change trend diagrams show that the attenuation is from 0dB to 100dB. Fig.10 The changing trend is obviously very gentle and is significantly improved in the linear region.

[0057] Fig. 9 and Fig.16 The following are the amplitude and phase change trend diagrams of the two-channel H / V working frequency band of the RF simulator from 2000MHz to 18000MHz before and after calibration. It can be seen Fig.16 The changing trend is obviously very gentle and is significantly improved in the linear region.

[0058] Figures 3 to 8 In the corresponding data graph, series 1 represents the changing trend of the amplitude value, and series 2 represents the changing trend of the phase value. Fig.16 In the figure, series 1 represents the changing trend of the amplitude value, and series 3 represents the changing trend of the phase value.

[0059] Example 3.

[0060] The present invention provides a radio frequency simulator channel consistency calibration system, comprising a radio frequency simulator, a vector network analyzer, a network device and a control terminal; The network device is used to confine the RF simulator, the vector network analyzer and the control end within a local area network. The RF simulator, the vector network analyzer and the control end communicate within the local area network. The output end of the RF simulator is connected to the input end of the vector network analyzer. The output end of the vector network analyzer is respectively connected to the input end of the RF simulator and the control end. The control end and the vector network analyzer jointly execute the method provided in Example 1.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for calibrating channel consistency of a radio frequency simulator, characterized in that: include: Acquire the RF signals output by all channels of the RF simulator, the acquired RF signals include RF signals of different frequencies and attenuated by different attenuation values, and perform single-channel phase consistency calibration and dual-channel amplitude and phase consistency calibration according to the acquired RF signals; The single-channel phase consistency calibration comprises: inputting the radio frequency signal of any channel into a vector network analyzer whose working mode is a difference mode, calculating the original phase value and the original amplitude value of the radio frequency signal and calculating the original amplitude and phase value table of the channel accordingly, calculating the phase difference table of the channel according to the original amplitude and phase value table, polling and calculating the phase difference tables of all channels, and compensating the phase of the radio frequency signal in the channel according to the phase difference table corresponding to the channel; The dual-channel amplitude and phase consistency calibration includes: taking any two channels as a combination, inputting the radio frequency signals of the two channels in any combination into a vector network analyzer whose working mode is a ratio mode, calculating the amplitude difference and phase difference between the two radio frequency signals of the combination and calculating the amplitude and phase difference table of the combination accordingly, polling and calculating the amplitude and phase difference tables of all combinations, and compensating the amplitude and phase of the radio frequency signals of the two channels in the combination according to the amplitude and phase difference tables corresponding to the combination.

2. The method for calibrating the radio frequency simulator channel consistency according to claim 1, characterized in that: The radio frequency signals with different frequencies and attenuated by different attenuation values ​​include: The RF signal is obtained by sequentially changing the output signal of the RF simulator according to a preset attenuation value, and the RF signal is obtained by sequentially changing the output signal of the RF simulator according to a preset frequency step.

3. The method for calibrating the radio frequency simulator channel consistency according to claim 1, characterized in that: The calculating the original phase value and the original amplitude value of the radio frequency signal includes: The amplitude value trajectory and phase value trajectory of the RF signal are established, the amplitude value trajectory is marked according to the amplitude characteristics to obtain the original amplitude value of the RF signal, and the phase value trajectory is marked according to the phase characteristics to obtain the original phase value of the RF signal.

4. The method for calibrating the radio frequency simulator channel consistency according to claim 1, characterized in that: The method of calculating the original phase value and the original amplitude value of the radio frequency signal and calculating the original amplitude and phase value table of the channel accordingly comprises: The original phase value and the original amplitude value of the RF signal are calculated, and the original phase value and the original amplitude value of the RF signal are stored in a blank table in the format of channel number-frequency-attenuation value-original amplitude value-original phase value to obtain the original amplitude and phase value table of the RF signal.

5. The method for calibrating the radio frequency simulator channel consistency according to claim 1, characterized in that: The step of calculating the phase difference table of the channel according to the original amplitude and phase value table includes: Subtract the phase corresponding to a certain frequency and a certain attenuation value in the original amplitude-phase table from the phase of the frequency when there is no attenuation value, and get the phase difference value caused by the attenuation of the RF signal at the frequency and the attenuation value. Poll all frequencies and attenuation values ​​to get the phase difference value caused by the attenuation of the RF signal at all frequencies and different attenuation values. Store the phase difference value in a blank table in the format of frequency-attenuation value-phase difference value to get the phase difference table of the channel.

6. The method for calibrating the radio frequency simulator channel consistency according to claim 1, characterized in that: The compensating the phase of the radio frequency signal in the channel according to the phase difference table corresponding to the channel includes: The phase difference values ​​corresponding to the RF signals of different frequencies and attenuated by different attenuation values ​​are found from the phase difference table, and the phase difference values ​​are added when controlling the phase of the RF signal to complete the phase compensation of the RF signal in the channel.

7. The method for calibrating the radio frequency simulator channel consistency according to claim 1, characterized in that: The calculating the amplitude difference and the phase difference between the two RF signals of the combination includes: The amplitude value trajectory and phase value trajectory of the two RF signals are established, the amplitude value trajectory is marked according to the amplitude characteristics to obtain the amplitude difference between the two RF signals, and the phase value trajectory is marked according to the phase characteristics to obtain the phase difference between the two RF signals.

8. The method for calibrating the radio frequency simulator channel consistency according to claim 1, characterized in that: The step of calculating the amplitude difference and phase difference between the two RF signals of the combination and calculating the amplitude and phase difference table of the combination accordingly comprises: The amplitude difference and phase difference between the two RF signals of the combination are calculated, and the amplitude difference and phase difference between the two RF signals are stored in a blank table in the format of two channel numbers-frequency-attenuation value-amplitude difference-phase difference value to obtain an amplitude-phase difference table of the combination.

9. The method for calibrating the radio frequency simulator channel consistency according to claim 1, characterized in that: The compensating the amplitude and phase of the radio frequency signals of the two channels in the combination according to the amplitude and phase difference table corresponding to the combination includes: Find the amplitude difference and phase difference corresponding to the RF signals of different frequencies and attenuated by different attenuation values ​​from the amplitude-phase difference table, add the amplitude difference when controlling the amplitude of the RF signal, and add the phase difference when controlling the phase of the RF signal to complete the compensation of the amplitude and phase of the RF signals of the two channels in the combination.

10. A radio frequency simulator channel consistency calibration system, characterized in that: Including RF simulator, vector network analyzer, network equipment and control terminal; The network device is used to confine the RF simulator, the vector network analyzer and the control end within a local area network. The RF simulator, the vector network analyzer and the control end communicate within the local area network. The output end of the RF simulator is connected to the input end of the vector network analyzer. The output end of the vector network analyzer is respectively connected to the input end of the RF simulator and the control end. The control end is used to control the RF simulator and the vector network analyzer. The control end and the vector network analyzer jointly perform the method described in any one of claims 1 to 9.

Images