CN115833869B - Radio frequency leakage measurement method and system - Google Patents
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Abstract
The application discloses a radio frequency leakage measurement method and a radio frequency leakage measurement system, which are used for measuring radio frequency gain vectors of a measured object in different states by setting different phase control quantity parameters and amplitude control quantity parameters, and can simply and quickly calculate radio frequency leakage vector values of the measured object according to the data and a leakage model; the method can simplify the complicated radio frequency leakage measurement problem and solve the problem that radio frequency leakage signals are difficult to quantitatively measure; meanwhile, the radio frequency leakage vector can be accurately measured by switching the amplitude and phase states and only one-time connection is needed, so that the method has strong universality; furthermore, a corresponding radio frequency leakage compensation vector can be obtained according to the accurate amplitude and phase of the radio frequency leakage vector, and the influence of radio frequency leakage can be effectively counteracted by superposing the radio frequency leakage compensation vector with a target signal vector.
Description
Technical Field
The present disclosure relates to the field of radio frequency measurement, and in particular, to a method and a system for measuring radio frequency leakage.
Background
The radio frequency leakage is a problem frequently encountered by a radio frequency system, particularly, the radio frequency leakage under the low gain condition (less than-90 dB) can bring serious influence to the performance index of a radio frequency receiving and transmitting channel, for example, the dynamic range of the radio frequency output power is reduced, so that the actual output radio frequency output power range is lower than the designed index requirement; it may also affect the linear relationship between the rf gain control amount and the measured rf gain, resulting in the rf gain control amount and the measured rf gain at some of the frequency division points exhibiting nonlinear characteristics.
The radio frequency leakage signal is an interference signal formed by the fact that an input signal reaches an output end through paths such as coupling and grounding, the signal and a normal signal are mixed together and cannot be separated, and the prior art can only qualitatively judge whether radio frequency leakage exists or not and cannot accurately measure.
Disclosure of Invention
The main purpose of the application is to provide a radio frequency leakage measurement method and a system, which aim at solving the technical problem that radio frequency leakage cannot be accurately measured.
In order to achieve the above object, the present application provides a radio frequency leakage measurement method, including:
controlling the radio frequency leakage measuring device to measure a radio frequency gain signal of the measured object; the measured object comprises an amplitude adjustable module and a phase adjustable module, wherein the phase adjustable module is applied with a preset phase control quantity parameter, and the amplitude adjustable module is applied with a preset amplitude control quantity parameter;
obtaining a radio frequency leakage vector according to the radio frequency gain signal and the leakage model; wherein the leakage model comprises a correlation of the radio frequency gain signal and the radio frequency leakage vector, the leakage model being obtained according to the following relation:
wherein ,
is a radio frequency leakage vector->
The gain control signals are radio frequency gain signals in different states, am and An are phase control amounts, and Sm and Sn are amplitude control amounts.
Optionally, before the step of controlling the radio frequency leakage measurement device to measure the radio frequency gain signal of the object to be measured, the method further includes:
applying the preset phase control quantity parameter and the preset amplitude control quantity parameter to the measured object;
and injecting a radio frequency sweep signal into the radio frequency leakage measuring device.
Optionally, after the step of obtaining the radio frequency leakage vector according to the radio frequency gain signal and the leakage model, the method further includes:
generating a radio frequency leakage compensation vector according to the radio frequency leakage vector;
and eliminating radio frequency leakage according to the radio frequency leakage compensation vector.
Optionally, the radio frequency leakage compensation vector is equal in magnitude and 180 ° out of phase with the radio frequency leakage vector according to the radio frequency leakage vector.
Optionally, the radio frequency leakage measurement device comprises a vector network instrument; before the step of controlling the radio frequency leakage measuring device to measure the radio frequency gain signal of the measured object, the method further comprises the following steps:
and setting the measurement parameters of the vector network instrument.
Optionally, before the step of acquiring the radio frequency gain signal from the radio frequency leakage measurement device, the method further includes:
and carrying out vector network calibration on the radio frequency leakage measurement device.
Optionally, the measured parameters include a start frequency, an end frequency, a frequency step, an excitation power, and an intermediate frequency bandwidth.
In addition, to achieve the above object, the present application further provides a radio frequency leakage measurement system, including:
the first module is used for controlling the radio frequency leakage measuring device to measure a radio frequency gain signal of the measured object; the measured object comprises an amplitude adjustable module and a phase adjustable module, wherein the phase adjustable module is applied with a preset phase control quantity parameter, and the amplitude adjustable module is applied with a preset amplitude control quantity parameter;
the second module is used for obtaining a radio frequency leakage vector according to the radio frequency gain signal and the leakage model; wherein the leakage model comprises a correlation of the radio frequency gain signal and the radio frequency leakage vector, the leakage model being obtained according to the following relation:
wherein ,
is a radio frequency leakage vector->
The gain control signals are radio frequency gain signals in different states, am and An are phase control amounts, and Sm and Sn are amplitude control amounts.
The beneficial effects that this application can realize.
According to the radio frequency leakage measuring method and system, the radio frequency gain signal of the measured object is measured by controlling the radio frequency leakage measuring device; the measured object comprises an amplitude adjustable module and a phase adjustable module, wherein the phase adjustable module is applied with a preset phase control quantity parameter, and the amplitude adjustable module is applied with a preset amplitude control quantity parameter; obtaining a radio frequency leakage vector according to the radio frequency gain signal and the leakage model; wherein the leakage model comprises a correlation of the radio frequency gain signal and the radio frequency leakage vector. The radio frequency gain signals of the measured object in different states are measured by setting different phase control quantity parameters and amplitude control quantity parameters, and the radio frequency leakage vector value of the measured object can be simply and rapidly calculated according to the data and the leakage model; the method can simplify the complicated radio frequency leakage measurement problem and solve the problem that radio frequency leakage signals are difficult to quantitatively measure; meanwhile, the radio frequency leakage vector can be accurately measured by switching the amplitude and phase states and only one-time connection is needed, so that the method has strong universality.
Drawings
Fig. 1 is a schematic flow chart of a radio frequency leakage measurement method according to an embodiment of the present application;
fig. 2 is a schematic functional block diagram of a radio frequency leakage measurement system according to an embodiment of the present application;
fig. 3 is a schematic diagram of an amplitude variation of a radio frequency leakage signal at 70dB according to an embodiment of the present application;
fig. 4 is a schematic diagram of a phase change of a 70dB rf leakage signal in an rf leakage measurement method according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of an amplitude variation of a 60dB rf leakage signal in an rf leakage measurement method according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of a phase change of a 60dB rf leakage signal in an rf leakage measurement method according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram of an amplitude-phase simulation performance of a radio frequency leakage measurement method according to an embodiment of the present application when leakage is considered in a 10GHz frequency point 80dB radio frequency leakage background;
fig. 8 is a schematic diagram of an amplitude-phase simulation performance of a radio frequency leakage measurement method provided in an embodiment of the present application when leakage is not considered in a 10GHz frequency point 80dB radio frequency leakage background;
fig. 9 is a schematic structural diagram of a radio frequency leakage measurement device and a measured object according to an embodiment of the present application.
The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The main solutions of the embodiments of the present application are: the radio frequency leakage measuring method and the system are provided, and the radio frequency gain signal of the measured object is measured by controlling the radio frequency leakage measuring device; the measured object comprises an amplitude adjustable module and a phase adjustable module, wherein the phase adjustable module is applied with a preset phase control quantity parameter, and the amplitude adjustable module is applied with a preset amplitude control quantity parameter; obtaining a radio frequency leakage vector according to the radio frequency gain signal and the leakage model; wherein the leakage model comprises a correlation of the radio frequency gain signal and the radio frequency leakage vector.
In the prior art, radio frequency leakage is a problem frequently encountered by a radio frequency system, particularly, the radio frequency leakage under the low gain condition (less than-90 dB) can bring serious influence to the performance index of a radio frequency receiving and transmitting channel, for example, the dynamic range of radio frequency output power can be influenced, and the actual output radio frequency output power range is lower than the designed index requirement; it may also affect the linear relationship between the rf gain control amount and the measured rf gain, resulting in the rf gain control amount and the measured rf gain at some of the frequency division points exhibiting nonlinear characteristics.
Therefore, the application provides a solution, by setting different phase control quantity parameters and amplitude control quantity parameters, the radio frequency gain vector of the measured object in different states is measured, and the radio frequency leakage vector value of the measured object can be simply and rapidly calculated according to the data and the leakage model; the method can simplify the complicated radio frequency leakage measurement problem and solve the problem that radio frequency leakage signals are difficult to quantitatively measure; meanwhile, the radio frequency leakage vector can be accurately measured by switching the amplitude and phase states and only one-time connection is needed, so that the method has strong universality; furthermore, a corresponding radio frequency leakage compensation vector can be obtained according to the accurate amplitude and phase of the radio frequency leakage vector, and the influence of radio frequency leakage can be effectively counteracted by superposing the radio frequency leakage compensation vector with a target signal vector.
Referring to fig. 1, based on the hardware device of the foregoing embodiment, an embodiment of the present application provides a radio frequency leakage measurement method, including:
s10: controlling the radio frequency leakage measuring device to measure a radio frequency gain signal of the measured object; the measured object comprises an amplitude adjustable module and a phase adjustable module, wherein the phase adjustable module is applied with a preset phase control quantity parameter, and the amplitude adjustable module is applied with a preset amplitude control quantity parameter;
in the implementation process, as shown in fig. 9, the measured object includes a module with adjustable amplitude and phase, specifically a vector modulator and an attenuator; the radio frequency leakage measuring device mainly comprises a vector network instrument. Applying a preset phase control quantity parameter to a phase adjustable module, namely a vector modulator, applying a preset amplitude control quantity parameter to an amplitude adjustable module, namely an attenuator, measuring S21 parameter data of an object to be measured by using a radio frequency leakage measuring device, and storing the S21 parameter data as an S2P data file, wherein the S2P file is a test result file of a vector network, comprises S parameter data of the object to be measured, typically various parameters such as S11, S12, S21, S22 and the like, and comprises amplitude and phase information; the S parameter is a scattering parameter, is an important parameter in microwave transmission, S21 is a forward transmission coefficient, namely gain, and the S21 parameter data comprises a radio frequency gain signal.
As an optional embodiment, before the step of controlling the rf leakage measurement device to measure the rf gain signal of the object to be measured, the method further includes: applying the preset phase control quantity parameter and the preset amplitude control quantity parameter to the measured object; and injecting a radio frequency sweep signal into the radio frequency leakage measuring device.
In the implementation process, the phase control quantity parameter and the amplitude control quantity parameter jointly form a control state, the control state refers to the state of An amplitude phase processing channel, wherein the phase control quantity (A) refers to the control quantity of a vector modulator, the amplitude control quantity (S) refers to the attenuation state of An exponential attenuator, the control state consists of phase control quantities Am and An and amplitude control quantities Sm and Sn, and the expressions of the phase control quantity parameters and the amplitude control quantity parameters are [ Am, sm ], [ An, sm ], [ Am, sn ], [ An, sn ]. In this embodiment, the Am control amount includes 2 parameters, representing I-path and Q-path control levels for the vector modulation modulator, the preset phase control amount parameters are set to (1, 0) and (0, 0), the preset amplitude control amount parameters are set to 0 and 63, i.e., the parameters of the control states are set to [1, 0], [0, 0], [1,0,63], [0,0,63]. In other embodiments, the phase control amount (a) may select an arbitrary state other than the (1, 0) and (0, 0) states, for example, (1, 1), (0.5 ); the amplitude control amount (S) may be selected from arbitrary state calculation results, such as 48 states, in addition to the 0 state and the 63 state.
And setting amplitude-phase channel processing states according to the preset phase control quantity parameters and the preset amplitude control quantity parameters, and measuring S21 parameter data by using a vector network to obtain radio frequency gain signals corresponding to all control states.
As an alternative embodiment, the radio frequency leakage measurement device comprises a vector network meter; before the step of controlling the radio frequency leakage measuring device to measure the radio frequency gain signal of the measured object, the method further comprises the following steps: and setting the measurement parameters of the vector network instrument.
In the implementation process, as shown in fig. 9, the radio frequency leakage measurement device mainly includes a vector network instrument. The vector network analyzer is one kind of electromagnetic wave energy measuring equipment capable of measuring various parameter amplitude values and phase of single port network or two port network and displaying test data with Smith chart. Before the radio frequency leakage measurement is started, the measurement parameters of the vector network instrument need to be set.
As an alternative embodiment, the measurement parameters include a start frequency, an end frequency, a frequency step, an excitation power, and an intermediate frequency bandwidth.
In an implementation, the measured parameters of the vector network instrument include, but are not limited to, a start frequency, an end frequency, a frequency step, an excitation power, and an intermediate frequency bandwidth. Specific data set in this embodiment are: the initial frequency is 2000MHz, the end frequency is 18000MHz, the frequency step is less than or equal to 10MHz, the excitation power is 1dBm, and the intermediate frequency bandwidth is less than or equal to 10Hz.
As an optional embodiment, before the step of controlling the rf leakage measurement device to measure the rf gain signal of the object to be measured, the method further includes: and carrying out vector network calibration on the radio frequency leakage measurement device.
In the specific implementation process, before the measurement is started, the vector network PassThrough calibration is also required to be executed on the radio frequency leakage measurement device, so that the system error is reduced to the minimum, and the accuracy of the whole measurement is improved.
S20: obtaining a radio frequency leakage vector according to the radio frequency gain signal and the leakage model; wherein the leakage model comprises a correlation of the radio frequency gain signal and the radio frequency leakage vector.
In the specific implementation process, after the test is finished, the obtained radio frequency gain signal is input into a leakage model to obtain a radio frequency leakage vector, wherein the radio frequency leakage vector is the radio frequency leakage of the carrier leakage path of the amplitude-phase processing channel under the test condition. The radio frequency leakage condition can be quantitatively evaluated by only one-time connection and completing the acquisition and calculation of the radio frequency receiving and transmitting channel S21 parameters by switching the amplitude and phase states, and the radio frequency receiving and transmitting device has strong universality, simplicity, rapidness and high accuracy.
As an alternative embodiment, the leakage model is obtained according to the following relation:
wherein ,
is a radio frequency leakage vector->
The gain control signals are radio frequency gain signals in different states, am and An are phase control amounts, and Sm and Sn are amplitude control amounts.
In the implementation process, the relation between the radio frequency output signal containing radio frequency leakage and the radio frequency input signal is as follows:
, wherein ,/>
For RF leakage signals from the carrier leakage path of the amplitude phase processing channel +.>
Is a radio frequency gain signal>
For sending from the normal path of the amplitude phase processing channelIs a radio frequency signal of (a). In the present embodiment, the phase control amount parameters are set to (1, 0) and (0, 0), the amplitude control amount is set to the attenuation state 0 and the attenuation state 63, i.e., the control state is [1, 0]]、[0,0,0]、[1,0,63]、[0,0,63]The following relation is given:
；
since only the operating state of the digitally controlled attenuator is changed between the attenuation states 0 and 63, and the link gain is changed, the following relation holds (this embodiment takes the states 0 and 63 as an example, and other attenuation states may be selected in other embodiments, this relation holds):
, wherein ,/>
A relative gain for decay state 63 relative to decay state 0;
the above relation is combined to obtain:
solving the above equation set can obtain:
obtaining a leakage model according to the above relation, and from the above relation, the leakage model is mathematically eliminated
The influence on the radio frequency leakage calculation result enables the radio frequency leakage to be calculated quantitatively and accurately.
As an optional implementation manner, after the step of obtaining the radio frequency leakage vector according to the radio frequency gain signal and the leakage model, the method further includes: generating a radio frequency leakage compensation vector according to the radio frequency leakage vector; and eliminating radio frequency leakage according to the radio frequency leakage compensation vector.
In the implementation process, after the radio frequency leakage vector is obtained, the measured radio frequency leakage value can be used for constructing a radio frequency leakage compensation vector, the influence of the radio frequency leakage signal is eliminated by a mode of carrying out vector superposition on the target signal and the radio frequency leakage offset signal, the amplitude-phase simulation precision under the state of large attenuation can be effectively improved, and the radio frequency leakage compensation vector can be used as replacement or supplement of a hardware radio frequency leakage solution. The derivation procedure is as follows:
the signal gain of the target amplitude-phase processing channel is:
the following relation holds:
then there are:
namely:
i.e. the signal generated by the target amplitude-phase processing channel
Comprises two parts: />
And
； wherein ,/>
For the signal to be actually output, +.>
Representing signals with the same amplitude and 180 degrees phase difference with the radio frequency leakage signals, and eliminating the influence of the radio frequency signals after the two signal vectors are overlapped.
According to the process, as long as the emergent frequency leakage signal can be accurately measured, even if the radio frequency leakage is high, the radio frequency leakage can be counteracted by the method, and an ideal compensation effect is achieved.
In order to more clearly demonstrate the feasibility and the accuracy of the result of the above-mentioned radio frequency leakage elimination method, the application also makes experiments on the radio frequency leakage elimination method, specifically as follows:
in the background of-110 dB radio frequency leakage, the amplitude and phase simulation is carried out respectively without processing and by adopting a radio frequency leakage compensation algorithm. Simulation results show that after the radio frequency leakage compensation algorithm is adopted, the amplitude-phase simulation accuracy is greatly improved even in a high attenuation state of-90 dB. The simulation results are shown in table 1:
TABLE 1 simulation results of amplitude and phase simulation precision effects
As an alternative embodiment, the radio frequency leakage compensation vector is equal in magnitude and 180 ° out of phase with the radio frequency leakage vector.
In the implementation process, a radio frequency leakage compensation vector with the same amplitude and 180-degree phase difference with the radio frequency leakage vector is generated by an amplitude-phase control method. The two vectors are overlapped to eliminate radio frequency leakage.
In order to more clearly demonstrate the feasibility and the accuracy of the result of the radio frequency leakage measurement method, the application also makes experiments on the radio frequency leakage measurement method, and the method is specifically as follows:
the adjustable attenuators (the adjustable attenuators are used for simulating radio frequency leakage) are respectively arranged to be 60dB and 70dB, two different conditions of the radio frequency leakage are simulated, corresponding radio frequency leakage data (amplitude and phase of a radio frequency leakage signal) are obtained through measurement, and as shown in fig. 3-6, the result shows that the radio frequency leakage data obtained by the method and the amplitude-phase data of an independent test radio frequency leakage loop are matched.
In the state of 80dB radio frequency leakage at the 10GHz frequency point, the method for eliminating the radio frequency leakage is adopted to verify the accuracy of amplitude-phase simulation in the background of the radio frequency leakage, test data of the radio frequency leakage is compared and considered, the final simulation effect is shown in fig. 7 and 8, and the result shows that the method for eliminating the radio frequency leakage can effectively improve the accuracy of amplitude-phase simulation in the state of large attenuation. Specifically, as shown in fig. 7 and 8, each ring represents an amplitude-phase simulation position when the amplitude is unchanged and the phase is continuously changed, wherein the black point is an imaginary part (standard) theoretical position, the gray point is an imaginary part (relative) actual simulation position, and when the inner-most ring and the outer-most ring represent-90 dB, -80dB, -70dB, -60dB and-50 dB respectively, the actual measured vector position and the theoretical position distribution comparison can be known: (1) After carrier leakage is considered, the simulation precision is obviously improved at the circular ring of-90 dB, -80dB and-70 dB; (2) The larger the amplitude is, the higher the simulation precision is, and when the amplitude is more than or equal to-60 dB, the amplitude-phase simulation precision is obviously improved.
It should be understood that the foregoing is merely illustrative, and the technical solutions of the present application are not limited in any way, and those skilled in the art may perform the setting based on the needs in practical applications, and the present application is not limited herein.
It is easy to find from the above description that in this embodiment, by setting different phase control amount parameters and amplitude control amount parameters, the radio frequency gain vector of the measured object in different states is measured, and the radio frequency leakage vector value of the measured object can be simply and quickly calculated according to the data and the leakage model; the method can simplify the complicated radio frequency leakage measurement problem and solve the problem that radio frequency leakage signals are difficult to quantitatively measure; meanwhile, the radio frequency leakage vector can be accurately measured by switching the amplitude and phase states and only one-time connection is needed, so that the method has strong universality; furthermore, a corresponding radio frequency leakage compensation vector can be obtained according to the accurate amplitude and phase of the radio frequency leakage vector, and the influence of radio frequency leakage can be effectively counteracted by superposing the radio frequency leakage compensation vector with a target signal vector.
Referring to fig. 2, based on the same inventive concept, an embodiment of the present application further provides a radio frequency leakage measurement system, including:
the first module is used for controlling the radio frequency leakage measuring device to measure a radio frequency gain signal of the measured object; the measured object comprises an amplitude adjustable module and a phase adjustable module, wherein the phase adjustable module is applied with a preset phase control quantity parameter, and the amplitude adjustable module is applied with a preset amplitude control quantity parameter;
the second module is used for obtaining a radio frequency leakage vector according to the radio frequency gain signal and the leakage model; wherein the leakage model comprises a correlation of the radio frequency gain signal and the radio frequency leakage vector.
It should be noted that, each module in the radio frequency leakage measurement system in this embodiment corresponds to each step in the radio frequency leakage measurement method in the foregoing embodiment one by one, so specific implementation of this embodiment may refer to implementation of the radio frequency leakage measurement method in the foregoing embodiment, and will not be described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (8)
1. A radio frequency leakage measurement method, comprising the steps of:
controlling the radio frequency leakage measuring device to measure a radio frequency gain signal of the measured object; the measured object comprises an amplitude adjustable module and a phase adjustable module, wherein the phase adjustable module is applied with a preset phase control quantity parameter, and the amplitude adjustable module is applied with a preset amplitude control quantity parameter;
obtaining a radio frequency leakage vector according to the radio frequency gain signal and the leakage model; wherein the leakage model comprises a correlation of the radio frequency gain signal and the radio frequency leakage vector, the leakage model being obtained according to the following relation:
wherein ,
is a radio frequency leakage vector->
For radio frequency gain in different statesThe signals Am and An are phase control amounts, and Sm and Sn are amplitude control amounts.
2. The radio frequency leakage measurement method according to claim 1, wherein before the step of controlling the radio frequency leakage measurement device to measure the radio frequency gain signal of the object to be measured, further comprising:
applying the preset phase control quantity parameter and the preset amplitude control quantity parameter to the measured object;
and injecting a radio frequency sweep signal into the radio frequency leakage measuring device.
3. The radio frequency leakage measurement method according to claim 1, wherein after the step of obtaining a radio frequency leakage vector from the radio frequency gain signal and the leakage model, further comprising:
generating a radio frequency leakage compensation vector according to the radio frequency leakage vector;
and eliminating radio frequency leakage according to the radio frequency leakage compensation vector.
4. The radio frequency leakage measurement method according to claim 3, wherein the radio frequency leakage compensation vector is equal in magnitude and 180 ° out of phase with the radio frequency leakage vector.
5. The radio frequency leakage measurement method according to claim 1, wherein the radio frequency leakage measurement device comprises a vector network meter; before the step of controlling the radio frequency leakage measuring device to measure the radio frequency gain signal of the measured object, the method further comprises the following steps:
and setting the measurement parameters of the vector network instrument.
6. The radio frequency leakage measurement method according to claim 1, wherein before the step of controlling the radio frequency leakage measurement device to measure the radio frequency gain signal of the object to be measured, further comprising:
and carrying out vector network calibration on the radio frequency leakage measurement device.
7. The radio frequency leakage measurement method according to claim 5, wherein the measurement parameters include a start frequency, an end frequency, a frequency step, an excitation power, and an intermediate frequency bandwidth.
8. A radio frequency leakage measurement system, comprising:
the first module is used for controlling the radio frequency leakage measuring device to measure a radio frequency gain signal of the measured object; the measured object comprises an amplitude adjustable module and a phase adjustable module, wherein the phase adjustable module is applied with a preset phase control quantity parameter, and the amplitude adjustable module is applied with a preset amplitude control quantity parameter;
the second module is used for obtaining a radio frequency leakage vector according to the radio frequency gain signal and the leakage model; wherein the leakage model comprises a correlation of the radio frequency gain signal and the radio frequency leakage vector, the leakage model being obtained according to the following relation:
wherein ,
is a radio frequency leakage vector->
The gain control signals are radio frequency gain signals in different states, am and An are phase control amounts, and Sm and Sn are amplitude control amounts. />
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