CN111970065A - Calibration method and device for radio frequency front-end module tester - Google Patents

Calibration method and device for radio frequency front-end module tester Download PDF

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CN111970065A
CN111970065A CN202010904048.0A CN202010904048A CN111970065A CN 111970065 A CN111970065 A CN 111970065A CN 202010904048 A CN202010904048 A CN 202010904048A CN 111970065 A CN111970065 A CN 111970065A
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radio frequency
power
signal source
power loss
frequency line
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CN111970065B (en
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胡信伟
侯林
张宇
冯勖
顾军
李翔
张熙瑞
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Nanjing Paige Measurement And Control Technology Co ltd
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Nanjing Paige Measurement And Control Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
    • H04B17/103—Reflected power, e.g. return loss
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/11—Monitoring; Testing of transmitters for calibration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements

Abstract

The invention provides a calibration method and a device for a radio frequency front-end module tester, wherein the method comprises the following steps: determining a first power loss value of a signal source and a signal source radio frequency line, a second power loss value of an auxiliary attenuator, a third power loss value of a coupler and a chip input end radio frequency line and a fourth power loss value of a chip output end radio frequency line and an attenuator; determining fifth power loss values of the amplifier, the coupler, the coupling end radio frequency line and the coupling end, sixth power loss values of the analyzer and the analyzer radio frequency line and seventh power loss values of the reflection end radio frequency line and the reflection end radio frequency line under radio frequency signals with different frequency and power combinations; and correcting the test result of the radio frequency front-end module test machine according to the first power loss value to the seventh power loss value. The scheme can improve the accuracy of the test result of the radio frequency front-end module test machine.

Description

Calibration method and device for radio frequency front-end module tester
Technical Field
The invention relates to the technical field of testing, in particular to a method and a device for calibrating a radio frequency front-end module testing machine.
Background
When the chip is automatically tested, the test result is inaccurate due to loss such as radio frequency line loss, nonlinear reflection of instruments, reflection of radio frequency signals and the like in transmission of radio frequency signals among various components of the test system, so that calibration of a radio frequency front-end module test machine is very necessary.
The system of the test equipment is mainly divided into an active instrument and a passive component according to whether an equivalent circuit model established by each component contains a power source (a voltage source or a current source), and the passive component generally has little influence on the power of a radio frequency signal and can be almost ignored. At present, the calibration of a testing machine has no relevant calibration standard, and is generally calibrated by a manufacturer or used as a general-purpose device, and each component which may have loss is not calibrated, so that calibration parameters are incomplete, and therefore, the test result of the testing machine is inaccurate.
Disclosure of Invention
The invention provides a calibration method and a calibration device for a radio frequency front-end module testing machine, which can improve the accuracy of a test result of the radio frequency front-end module testing machine.
In a first aspect, an embodiment of the present invention provides a calibration method for a radio frequency front end module tester, which is used to calibrate the radio frequency front end module tester including a signal source, a coupling end, a reflection end, an analyzer, a power amplifier, a coupler, an attenuator, a signal source radio frequency line, a coupling end radio frequency line, a reflection end radio frequency line, a chip input end radio frequency line, a chip output end radio frequency line, and an analyzer radio frequency line, and includes:
after at least two of the signal source, the signal source radio frequency line, the coupler, the chip input end radio frequency line, the chip output end radio frequency line, the attenuator and the auxiliary attenuator are sequentially connected with a power meter respectively, determining a first power loss value of the signal source and the signal source radio frequency line, a second power loss value of the auxiliary attenuator, a third power loss value of the coupler and the chip input end radio frequency line and a fourth power loss value of the chip output end radio frequency line and the attenuator according to the power of the signal source input end radio frequency signal and the power of the radio frequency signal detected by the power meter;
after a dynamic calibration component combination is respectively connected with the power meter, the analyzer radio frequency line and the analyzer, and the reflection end radio frequency line and the reflection end, and radio frequency signals with different frequency and power combinations are input from the signal source, according to the power of the radio frequency signal at the input end of the signal source and the power of the radio frequency signals detected by the coupling end, the reflection end, the analyzer and the power meter, determining fifth power loss values of the power amplifier, the coupler, the coupling end radio frequency line and the coupling end, sixth power loss values of the analyzer and the analyzer radio frequency line, and seventh power loss values of the reflection end and the reflection end radio frequency line under the radio frequency signals with different frequency and power combinations, wherein in the dynamic calibration component combination, the signal source radio frequency line, the analyzer, and the reflection end radio frequency line, The power amplifier, the coupler, the chip output radio frequency line and the auxiliary attenuator are sequentially connected, and the coupling end is connected with the coupler through the coupling end radio frequency line;
and correcting the test result of the radio frequency front-end module test machine according to the first power loss value to the seventh power loss value.
In one possible design, the power attenuation of the auxiliary attenuator is determined according to the power gain of the chip to be tested and the power attenuation of the attenuator.
In one possible design, determining a first power loss value for the signal source and the signal source radio frequency line includes:
after the signal source, the signal source radio frequency line and the power meter are connected in sequence, calculating a first power loss value of the signal source and the signal source radio frequency line according to the following formula (1):
Figure 361037DEST_PATH_IMAGE001
(1)
wherein, Δ W1A first power loss value, W, for characterizing said signal source and said signal source radio frequency lineSGFor characterizing the power, W, of the radio-frequency signal at the input of said signal sourcePMFor characterizing the power of the radio frequency signal detected by the power meter.
In one possible design, determining the second power loss value of the secondary attenuator includes:
after the signal source, the signal source radio frequency line, the auxiliary attenuator and the power meter are connected in sequence, calculating a second power loss value of the auxiliary attenuator according to the following formula (2):
Figure 493728DEST_PATH_IMAGE002
(2)
wherein, Δ W2A second power loss value, W, for characterizing the secondary attenuatorFIs the attenuated power of the secondary attenuator, WSGFor characterizing the power, W, of the radio-frequency signal at the input of said signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1The first power loss value is used for characterizing the signal source and the radio frequency line of the signal source.
In one possible design, determining a third power loss value for the coupler and the rf line at the input of the chip includes:
after the signal source, the signal source radio frequency line, the coupler, the chip input end radio frequency line and the power meter are sequentially connected, calculating a third power loss value of the coupler and the chip input end radio frequency line according to the following formula (3):
Figure 481276DEST_PATH_IMAGE003
(3)
wherein, Δ W3A third power loss value, W, for characterizing the coupler and the RF line at the chip inputSGFor characterizing the power, W, of the radio-frequency signal at the input of said signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1The first power loss value is used for characterizing the signal source and the radio frequency line of the signal source.
In one possible design, determining a fourth power loss value of the rf line at the output of the chip and the attenuator includes:
after the signal source, the signal source radio frequency line, the chip output end radio frequency line, the attenuator and the power meter are sequentially connected, a fourth power loss value of the chip output end radio frequency line and the attenuator is calculated according to the following formula (4):
Figure 971163DEST_PATH_IMAGE004
(4)
wherein, Δ W4A fourth power loss value, W, for characterizing the attenuator and the RF line at the output of the chipSGFor characterizing the power, W, of the radio-frequency signal at the input of said signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1A first power loss value, W, for characterizing said signal source and said signal source radio frequency lineSFor characterizing the attenuated power of the attenuator.
In one possible design, determining a fifth power loss value of the power amplifier, the coupler, the coupling end rf line, and the coupling end at rf signals of different frequency and power combinations comprises:
connecting a dynamic calibration component assembly with the power meter, wherein the signal source, the signal source radio frequency line, the power amplifier, the coupler, the chip output radio frequency line and the auxiliary attenuator in the dynamic calibration component assembly are sequentially connected, and the coupling end is connected with the coupler through the coupling end radio frequency line;
after radio frequency signals with different frequency and power combinations are input from the signal source, calculating a fifth power loss value of the radio frequency line at the output end of the chip and the attenuator according to the following formula (5):
Figure 189917DEST_PATH_IMAGE005
(5)
wherein, Δ W5A fifth power loss value, W, for characterizing the power amplifier, the coupler, the coupling end RF line and the coupling end under RF signals of different frequency and power combinationsDFor increasing power of said power amplifier, WSGFor characterizing the power of the radio frequency signal at the input of the signal source, WPMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1A first power loss value, Δ W, for characterizing said signal source and said signal source radio frequency line2A second power loss value, AW, for characterizing the secondary attenuator4And the fourth power loss value is used for representing the radio frequency line at the output end of the chip and the attenuator.
In one possible design, determining a sixth power loss value for the analyzer and the analyzer radio frequency line at different frequency and power combinations of the radio frequency signal includes:
connecting a dynamic calibration component assembly with the analyzer radio frequency line and the analyzer, wherein the signal source, the signal source radio frequency line, the power amplifier, the coupler, the chip output radio frequency line and the auxiliary attenuator in the dynamic calibration component assembly are sequentially connected, and the coupling end is connected with the coupler through the coupling end radio frequency line;
after inputting radio frequency signals having different frequency and power combinations from the signal source, calculating a sixth power loss value of the analyzer and the analyzer radio frequency line according to the following formula (6):
Figure 802164DEST_PATH_IMAGE006
(6)
wherein, Δ W6A sixth power loss value, W, for characterizing the analyzer and the analyzer RF line at RF signals of different frequency and power combinationsDFor increasing power of said power amplifier, WSGFor characterizing the power, W, of the radio-frequency signal at the input of said signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1A first power loss value, Δ W, for characterizing said signal source and said signal source radio frequency line2A second power loss value, AW, for characterizing the secondary attenuator4And the fourth power loss value is used for representing the radio frequency line at the output end of the chip and the attenuator.
In one possible design, determining a seventh power loss value for the reflected end and the reflected end rf line for rf signals of different frequency and power combinations includes:
connecting a dynamic calibration component assembly with the reflection end and the reflection end radio frequency line, wherein the signal source, the signal source radio frequency line, the power amplifier, the coupler, the chip output radio frequency line and the auxiliary attenuator in the dynamic calibration component assembly are sequentially connected, and the coupling end is connected with the coupler through the coupling end radio frequency line;
after radio frequency signals with different frequency and power combinations are input from the signal source, calculating seventh power loss values of the reflection end and the reflection end radio frequency line according to the following formula (7):
Figure 480270DEST_PATH_IMAGE007
(7)
wherein, Δ W7A seventh power loss value, W, for characterizing said reflected end and said reflected end RF line at RF signals of different frequency and power combinationsRFLFor characterizing the power, AW, of the RF signal detected by said reflecting end2A second power loss value, AW, for characterizing the secondary attenuator3And the third power loss value is used for representing the coupling end and the radio frequency line at the input end of the chip.
In a second aspect, an embodiment of the present invention further provides a calibration apparatus for a radio frequency front end module tester, which is used to calibrate the radio frequency front end module tester including a signal source, a coupling end, a reflection end, an analyzer, a power amplifier, a coupler, an attenuator, a signal source radio frequency line, a coupling end radio frequency line, a reflection end radio frequency line, a chip input end radio frequency line, a chip output end radio frequency line, and an analyzer radio frequency line, and includes: the device comprises a static calibration module, a dynamic calibration module and a calibration module;
the static calibration module is used for determining a first power loss value of the signal source and a radio frequency line of the signal source, a second power loss value of an auxiliary attenuator, a third power loss value of the coupler and the radio frequency line of the chip input end and a fourth power loss value of the radio frequency line of the chip output end and the attenuator according to the power of the radio frequency signal at the input end of the signal source and the power of the radio frequency signal detected by the power meter;
the dynamic calibration module is configured to determine, according to the power of a radio frequency signal at the input end of the signal source and the powers of the radio frequency signals detected by the coupling end, the reflection end, the analyzer and the power meter, fifth power loss values of the power amplifier, the coupler, the coupling end radio frequency line and the coupling end, sixth power loss values of the analyzer and the analyzer radio frequency line, and seventh power loss values of the reflection end and the reflection end radio frequency line under radio frequency signals with different frequency and power combinations;
the calibration module is configured to correct the test result of the radio frequency front end module tester according to the first to fourth power loss values determined by the static calibration module and the fifth to seventh power loss values determined by the dynamic calibration module.
According to the technical scheme, the calibration method of the radio frequency front end module testing machine obtains the fifth power loss value to the seventh power loss value through dynamic calibration on the basis of obtaining the first power loss value to the fourth power loss value through static calibration, and corrects the test result of the radio frequency front end module testing machine according to the first power loss value to the seventh power loss value. The method combines static calibration and dynamic calibration to comprehensively calibrate the components of the radio frequency front-end module testing machine and correct the test result according to the calibration result, thereby improving the accuracy of the test result of the radio frequency front-end module testing machine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method for calibrating a RF front-end module tester according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a static calibration component connection of an RF front end module tester according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another alternative RF front end module tester static calibration component connection provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of a static calibration component connection of an RF front end module tester according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a static calibration component connection of a further RF front end module tester according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a dynamic calibration component connection of an RF front end module tester according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of another alternative RF front end module tester dynamic calibration component connection provided in accordance with an embodiment of the present invention;
FIG. 8 is a schematic diagram of a dynamic calibration component connection for an RF front end module tester according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of an apparatus where a calibration device of a RF front-end module testing machine according to an embodiment of the present invention is located;
FIG. 10 is a schematic diagram of a calibration apparatus for a RF front end module tester according to an embodiment of the present invention;
fig. 11 is a flowchart of a calibration method for an rf front-end module tester according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a calibration method for a radio frequency front end module tester, which is used to calibrate the radio frequency front end module tester including a signal source, a coupling end, a reflection end, an analyzer, a power amplifier, a coupler, an attenuator, a signal source radio frequency line, a coupling end radio frequency line, a reflection end radio frequency line, a chip input end radio frequency line, a chip output end radio frequency line, and an analyzer radio frequency line, and the calibration method may include the following steps:
step 101: according to the power of the radio-frequency signal at the input end of the signal source and the power of the radio-frequency signal detected by the power meter, determining a first power loss value of the signal source and a radio-frequency line of the signal source, a second power loss value of the auxiliary attenuator, a third power loss value of the coupler and the radio-frequency line at the input end of the chip, and a fourth power loss value of the radio-frequency line at the output end of the chip and the attenuator;
step 102: according to the power of the radio-frequency signal at the input end of the signal source and the power of the radio-frequency signal detected by the coupling end, the reflecting end, the analyzer and the power meter, determining fifth power loss values of the power amplifier, the coupler, the coupling end radio-frequency line and the coupling end, sixth power loss values of the analyzer and the analyzer radio-frequency line and seventh power loss values of the reflecting end radio-frequency line and the reflecting end radio-frequency line under the radio-frequency signals with different frequency and power combinations;
step 103: and correcting the test result of the radio frequency front-end module test machine according to the first power loss value to the seventh power loss value.
In the embodiment of the present invention, the calibration method for the radio frequency front end module testing machine, provided by the present invention, obtains the fifth power loss value to the seventh power loss value through dynamic calibration on the basis of obtaining the first power loss value to the fourth power loss value through static calibration, and corrects the test result of the radio frequency front end module testing machine according to the first power loss value to the seventh power loss value. The method combines static calibration and dynamic calibration to comprehensively calibrate the components of the radio frequency front-end module testing machine and correct the test result according to the calibration result, thereby improving the accuracy of the test result of the radio frequency front-end module testing machine.
In the embodiment of the present invention, the rf front end module tester may be, for example, a PGT-X series tester (for example, a PGT-100 tester, a PGT-200 tester, etc.), or may be another tester having the same structure as the rf front end module tester.
It can be understood that, in the embodiment of the present invention, when the rf front-end module tester is used for performing the performance test of the package test function of the rf integrated circuit chip, the test result can be corrected through the following two aspects. On one hand, the power of the radio frequency signals detected by the analyzer, the reflection end, the signal source and the coupling end and the power loss value of the test machine component of the radio frequency front end module are the actual power of the radio frequency signals detected by the analyzer, the reflection end, the signal source and the coupling end. On the other hand, considering the power loss value of each component, the power loss value of the test machine component of the radio frequency front end module is increased on the basis of the input value of the signal source, and the power of the radio frequency signal detected by the analyzer, the reflection end and the coupling end is the actual power. Thereby making the accuracy of the test results higher.
Based on the calibration method for the radio frequency front end module tester shown in fig. 1, in an embodiment of the present invention, the power attenuation of the auxiliary attenuator is determined according to the power gain of the chip to be tested and the power attenuation of the attenuator.
In the embodiment of the invention, the auxiliary attenuator can select proper attenuation power according to the attenuation power of the attenuator in the radio frequency front end module testing machine and the power gain of the chip to be tested.
It should be noted that, in the embodiment of the present invention, there is no chip to be tested in the static calibration and dynamic calibration processes, and since the power range of the radio frequency signal detected by the signal source and the analyzer is-30 dB to 0dB, the error is relatively small, that is, when the static calibration or the dynamic calibration is performed, it is usually expected that the input of the signal source is 0dB, and the input of the analyzer is also 0 dB. Therefore, when the attenuation power of the attenuator is 60dB, considering that no chip to be tested gains 15dB in static calibration or dynamic calibration, an auxiliary attenuator with an attenuation value of 45dB may be used instead of the chip to be tested and the attenuator with an attenuation value of 60 dB.
In an embodiment of the present invention, based on the calibration method for the radio frequency front end module tester shown in fig. 1, when the first power loss values of the signal source and the signal source radio frequency line are determined in step 101, the signal source radio frequency line, and the power meter may be sequentially connected in a manner shown in fig. 2, and then the first power loss values of the signal source and the signal source radio frequency line are determined through the following steps:
calculating a first power loss value of the signal source and the signal source radio frequency line according to the following formula (1):
Figure 662596DEST_PATH_IMAGE001
(1)
wherein, Δ W1First power loss value, W, for characterizing signal sources and signal source radio frequency linesSGFor characterizing the power, W, of the radio-frequency signal at the input of the signal sourcePMFor characterizing the power of the radio frequency signal detected by the power meter.
In an embodiment of the present invention, based on the calibration method for the radio frequency front end module tester shown in fig. 1, when the second power loss value of the auxiliary attenuator is determined in step 101, the signal source radio frequency line, the auxiliary attenuator, and the power meter may be sequentially connected in the manner shown in fig. 3, and then the second power loss value of the auxiliary attenuator is determined through the following steps:
calculating a second power loss value of the secondary attenuator according to the following equation (2):
Figure 172075DEST_PATH_IMAGE002
(2)
wherein, Δ W2Second power loss value, W, for characterizing the secondary attenuatorFAttenuated power, W, of the auxiliary attenuatorSGFor characterizing the power, W, of the radio-frequency signal at the input of the signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1The first power loss value is used for representing the signal source and the radio frequency line of the signal source.
In an embodiment of the present invention, based on the calibration method for the rf front-end module tester shown in fig. 1, when determining the third power loss values of the coupler and the rf line at the input end of the chip in step 101, the signal source, the rf line of the signal source, the coupler, the rf line at the input end of the chip, and the power meter may be sequentially connected in a manner shown in fig. 4, and then the third power loss values of the coupler and the rf line at the input end of the chip are determined through the following steps:
calculating a third power loss value of the coupler and the radio frequency line at the input end of the chip according to the following formula (3):
Figure 627327DEST_PATH_IMAGE003
(3)
wherein, Δ W3Third power loss value, W, for characterizing RF lines at the input of the coupler and chipSGFor characterizing the power, W, of the radio-frequency signal at the input of the signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1The first power loss value is used for representing the signal source and the radio frequency line of the signal source.
In an embodiment of the present invention, based on the calibration method for the rf front-end module tester shown in fig. 1, when determining the fourth power loss of the rf line at the output end of the chip and the attenuator in step 101, the signal source, the rf line at the output end of the chip, the attenuator, and the power meter may be sequentially connected in a manner shown in fig. 5, and then the fourth power loss of the rf line at the output end of the chip and the attenuator may be determined through the following steps:
calculating a fourth power loss value of the radio frequency line at the output end of the chip and the attenuator according to the following formula (4):
Figure 58308DEST_PATH_IMAGE004
(4)
wherein, Δ W4Fourth power loss value, W, for characterizing the attenuator and the RF line at the output of the chipSGFor characterizing the power, W, of the radio-frequency signal at the input of the signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1First power loss value, W, for characterizing signal sources and signal source radio frequency linesSFor characterizing the attenuated power of the attenuator.
In the embodiment of the invention, after the first power loss values of the signal source and the signal source radio frequency line are obtained by the power meter, the signal source and the signal source radio frequency line are respectively connected with the auxiliary attenuator, the coupler and the chip input end radio frequency line, and the chip output end radio frequency line and the attenuator are connected with the power meter, so that the power loss values of all parts under different frequencies can be determined. In the static calibration process, except for necessary instruments for normally testing the radio frequency front-end module testing machine, only a power meter needs to be additionally used, so that the operation is simple, and the calibration cost is low.
It should be noted that, in the embodiment of the present invention, the components that need static calibration include a signal source, a signal source radio frequency line, an auxiliary attenuator, a coupler, a chip input end radio frequency line, a chip output end radio frequency line, and an attenuator, and since the influence of power on the above components is relatively small, only frequency sweeping is needed in the static calibration process, and the frequency value is taken as an abscissa, and an ordinate records power values output by the left end and the right end of the target component, so that power loss values of the target component at different frequencies can be obtained. In addition, the static calibration needs to be carried out once in half a month, each static calibration time is 5 minutes, and the calibration cost is low.
In addition, when determining the first power loss value to the fourth power loss value, the connection relationship between the components is only one connection method, and the power loss values of the components may be determined by other connection methods. For example, the fourth power loss value of the chip output end radio frequency line and the attenuator may be determined by sequentially connecting the signal source, the signal source radio frequency line, the coupler, the chip input end radio frequency line, the chip output end radio frequency line, the attenuator, and the power meter, according to the signal source input value, the power value of the radio frequency information detected by the power meter, the first power loss value, and the third power loss value.
In an embodiment of the present invention, based on the calibration method for the rf front-end module tester shown in fig. 1, when determining fifth power loss values of the power amplifier, the coupler, the coupling-end rf line, and the coupling end under rf signals with different frequency and power combinations in step 102, the dynamic calibration component combination may be connected to the power meter in a manner shown in fig. 6, where a signal source, a signal source rf line, the power amplifier, the coupler, a chip output rf line, and an auxiliary attenuator in the dynamic calibration component combination are sequentially connected, and the coupling end is connected to the coupler through the coupling-end rf line, and then the fifth power loss values of the power amplifier, the coupler, the coupling-end rf line, and the coupling end under rf signals with different frequency and power combinations are determined through the following steps:
after radio frequency signals with different frequency and power combinations are input from a signal source, calculating a fifth power loss value of the power amplifier, the coupler, the coupling end radio frequency line and the coupling end according to the following formula (5):
Figure 217894DEST_PATH_IMAGE005
(5)
wherein, Δ W5Fifth power loss value, W, for characterizing the amplifier, coupler, coupling end RF line and coupling end under RF signals of different frequency and power combinationsDFor increasing power of the power amplifier, WSGFor characterizing the power, W, of the radio-frequency signal at the input of the signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1For characterizing a first power loss value, AW, of a signal source and a radio frequency line of the signal source2Second power loss value, AW, for characterizing the secondary attenuator4And the fourth power loss value is used for representing the radio frequency line at the output end of the chip and the attenuator.
In an embodiment of the present invention, based on the calibration method for the rf front-end module tester shown in fig. 1, when determining sixth power loss values of the radio frequency lines of the analyzer and the analyzer under radio frequency signals with different frequency and power combinations in step 102, the dynamic calibration component combination may be connected to the radio frequency lines of the analyzer and the analyzer in a manner shown in fig. 7, where a signal source, a signal source radio frequency line, a power amplifier, a coupler, a chip output radio frequency line, and an auxiliary attenuator in the dynamic calibration component combination are sequentially connected, and a coupling end is connected to the coupler through a coupling end radio frequency line, and then the sixth power loss values of the radio frequency lines of the analyzer and the analyzer under radio frequency signals with different frequency and power combinations are determined through the following steps:
after inputting radio frequency signals having different frequency and power combinations from the signal source, a sixth power loss value of the analyzer and the analyzer radio frequency line is calculated according to the following formula (6):
Figure 83344DEST_PATH_IMAGE006
(6)
wherein, Δ W6Sixth power loss value, W, for characterizing the analyzer and analyzer RF line under RF signals of different frequency and power combinationsDFor increasing power of the power amplifier, WSGFor characterizing the power, W, of the radio-frequency signal at the input of the signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1For characterizing a first power loss value, AW, of a signal source and a radio frequency line of the signal source2Second power loss value, AW, for characterizing the secondary attenuator4And the fourth power loss value is used for representing the radio frequency line at the output end of the chip and the attenuator.
In an embodiment of the present invention, based on the calibration method for the rf front-end module tester shown in fig. 1, when determining seventh power loss values of the reflection end and the reflection end rf line under rf signals with different frequency and power combinations in step 102, the dynamic calibration component combination may be connected to the reflection end and the reflection end rf line in a manner shown in fig. 8, where a signal source, a signal source rf line, a power amplifier, a coupler, a chip output rf line, and an auxiliary attenuator in the dynamic calibration component combination are sequentially connected, and a coupling end is connected to the coupler through the coupling end rf line, and then the seventh power loss values of the reflection end and the reflection end rf line under rf signals with different frequency and power combinations are determined through the following steps:
after radio frequency signals with different frequency and power combinations are input from the signal source, seventh power loss values of the radio frequency lines at the reflection end and the reflection end are calculated according to the following formula (7):
Figure 506235DEST_PATH_IMAGE007
(7)
wherein, Δ W7A seventh power loss value, W, for characterizing reflected end and reflected end RF lines under RF signals of different frequency and power combinationsRFLFor characterising the radio-frequency signal detected at the reflecting endPower, Δ W2Second power loss value, AW, for characterizing the secondary attenuator3And the third power loss value is used for representing the radio frequency lines at the coupling end and the chip input end.
In the embodiment of the invention, the dynamic calibration component is respectively connected with the power meter, the analyzer and the analyzer radio frequency line as well as the reflection end and the reflection end radio frequency line, and after the signal source inputs radio frequency signals with different frequencies and power combinations, the power loss values of each component under the radio frequency signals with different frequencies and power combinations can be obtained by combining each power loss value obtained by static calibration. On the basis of static calibration, except for necessary instruments for normally testing the radio frequency front end module testing machine, the dynamic calibration can obtain fifth to seventh power loss values only by additionally using an auxiliary attenuator, and the dynamic calibration is simple to operate and accurate in calibration.
It should be noted that, in the embodiment of the present invention, the components that need to be dynamically calibrated include an amplifier, a coupling end radio frequency line, a coupling end, an analyzer radio frequency line, a reflection end, and a reflection end radio frequency line. Since both power and frequency affect the above components, the dynamic calibration requires both power and frequency to be swept, that is, the input of the rf signal is a waveform diagram, which has both frequency and power, and can record the current power and the corresponding frequency at the same time. The dynamic calibration needs to be performed once a month, the calibration process is 10 minutes, the calibration cost is low, and the calibration is accurate.
In addition, when determining the fifth to seventh power loss values, the connection relationship between the components is only one of the connection manners, and the power loss values of the components may be determined by other connection manners. For example, the sixth power loss value of the analyzer and the analyzer rf line under a certain frequency and power combined rf signal can also be obtained according to the difference between the power value of the rf signal detected by the analyzer and the power value detected by the power meter under the rf signal with the same frequency and power combined.
As shown in fig. 9 and 10, an embodiment of the present invention provides a calibration apparatus for an rf front-end module tester. The embodiment of the calibration device for the radio frequency front-end module testing machine can be realized by software, or can be realized by hardware or a combination of the software and the hardware. In terms of hardware, as shown in fig. 9, a hardware structure diagram of a device in which the calibration apparatus of the radio frequency front end module tester provided in the embodiment of the present invention is located is shown, where in addition to the processor, the memory, the network interface, and the nonvolatile memory shown in fig. 9, the device in the embodiment may also include other hardware, such as a forwarding chip responsible for processing a packet, in general. Taking a software implementation as an example, as shown in fig. 10, as a logical apparatus, the apparatus is formed by reading a corresponding computer program instruction in a non-volatile memory into a memory by a CPU of a device in which the apparatus is located and running the computer program instruction.
As shown in fig. 10, the calibration apparatus for a radio frequency front end module testing machine provided in this embodiment is configured to calibrate the radio frequency front end module testing machine including a signal source, a coupling end, a reflection end, an analyzer, a power amplifier, a coupler, an attenuator, a signal source radio frequency line, a coupling end radio frequency line, a reflection end radio frequency line, a chip input end radio frequency line, a chip output end radio frequency line, and an analyzer radio frequency line, and includes: a static calibration module 1001, a dynamic calibration module 1002, and a calibration module 1003;
a static calibration module 1001, configured to determine, according to the power of the radio frequency signal at the input end of the signal source and the power of the radio frequency signal detected by the power meter, a first power loss value of the signal source and the radio frequency line of the signal source, a second power loss value of the auxiliary attenuator, a third power loss value of the coupler and the radio frequency line at the input end of the chip, and a fourth power loss value of the radio frequency line at the output end of the chip and the attenuator;
the dynamic calibration module 1002 is configured to determine, according to the power of the radio frequency signal at the input end of the signal source and the powers of the radio frequency signals detected by the coupling end, the reflection end, the analyzer, and the power meter, fifth power loss values of the power amplifier, the coupler, the coupling end radio frequency line, and the coupling end, sixth power loss values of the analyzer and the analyzer radio frequency line, and seventh power loss values of the reflection end and the reflection end radio frequency line under radio frequency signals with different frequency and power combinations;
the calibration module 1003 is configured to correct the test result of the radio frequency front end module tester according to the first to fourth power loss values determined by the static calibration module 1001 and the fifth to seventh power loss values determined by the dynamic calibration module 1002.
It should be noted that the structure illustrated in the embodiment of the present invention does not specifically limit the calibration apparatus of the rf front-end module testing machine. In other embodiments of the present invention, the rf front end module tester calibration device may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
Because the content of information interaction, execution process, and the like among the modules in the device is based on the same concept as the method embodiment of the present invention, specific content can be referred to the description in the method embodiment of the present invention, and is not described herein again.
In order to make the calibration method for the rf front-end module testing machine provided in the embodiment of the present invention clearer, the following describes in further detail the calibration method for the rf front-end module testing machine provided in the embodiment of the present invention with reference to a specific example, as shown in fig. 11, the method may include the following steps:
step 1101: the power attenuation of the secondary attenuator is determined.
In this step, the power attenuation of the auxiliary attenuator is determined according to the power gain of the chip to be tested and the power attenuation of the component attenuator.
For example, the chip to be tested is not included in the calibration process of the radio frequency front end module testing machine, the power gain of the chip to be tested is usually 15dB, the power loss value of each component is not considered, and when the attenuation power of the attenuator is 60dB, the power attenuation of the auxiliary attenuator is 45dB, so that the auxiliary attenuator with the power attenuation of 45dB can be adopted to replace the chip to be tested and the attenuator with the attenuation power of 60dB in the calibration process of the radio frequency front end module testing machine.
Step 1102: a first power loss value of a signal source and a signal source radio frequency line is determined.
In this step, after the signal source, the signal source rf line and the power meter are sequentially connected, the static calibration module may calculate the first power loss values of the signal source and the signal source rf line at different frequencies according to the following formula (1):
Figure 955671DEST_PATH_IMAGE001
(1)
wherein, Δ W1First power loss value, W, for characterizing signal sources and signal source radio frequency linesSGFor characterizing the power, W, of the radio-frequency signal at the input of the signal sourcePMFor characterizing the power of the radio frequency signal detected by the power meter.
For example, a signal source radio frequency line and a power meter are connected in sequence, when the frequency is a, the input value of the signal source is 0dB, and the power value of a radio frequency signal detected by the power meter is-0.05 dB, each numerical value is substituted into the formula (1), and the first power loss value of the signal source and the signal source radio frequency line under the frequency a can be calculated to be 0.05 dB.
Step 1103: a second power loss value of the secondary attenuator is determined.
In this step, after the signal source, the signal source radio frequency line, the auxiliary attenuator, and the power meter are sequentially connected, the static calibration module may calculate a second power loss value of the auxiliary attenuator at different frequencies according to the following formula (2):
Figure 856631DEST_PATH_IMAGE002
(2)
wherein, Δ W2Second power loss value, W, for characterizing the secondary attenuatorFAttenuated power, W, of the auxiliary attenuatorSGFor characterizing the power, W, of the radio-frequency signal at the input of the signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1The first power loss value is used for representing the signal source and the radio frequency line of the signal source.
In this step, as in the previous example, the signal source rf line, the auxiliary attenuator, and the power meter are sequentially connected, when the frequency is a and the signal source input value is 0dB, the power value of the rf signal detected by the power meter is-45.06 dB, the attenuation power of the auxiliary attenuator is 45dB, and the first power loss value of the signal source and the signal source rf line at the frequency a is 0.05dB, and the power loss value of the auxiliary attenuator at the frequency a can be calculated by substituting each value into the formula (2).
Step 1104: and determining a third power loss value of the coupler and the radio frequency line at the input end of the chip.
In this step, after the signal source, the signal source rf line, the coupler, the chip input end rf line, and the power meter are sequentially connected, the static calibration module may calculate a third power loss value of the coupler and the chip input end rf line at different frequencies according to the following formula (3):
Figure 591236DEST_PATH_IMAGE003
(3)
wherein, Δ W3Third power loss value, W, for characterizing RF lines at the input of the coupler and chipSGFor characterizing the power, W, of the radio-frequency signal at the input of the signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1The first power loss value is used for representing the signal source and the radio frequency line of the signal source.
For example, a signal source radio frequency line, a coupler, a chip input end radio frequency line and a power meter are connected in sequence, when the frequency is A and the signal source input value is 0dB, the power value of a radio frequency signal detected by the power meter is-0.07 dB, the first power loss value of the signal source and the signal source radio frequency line under the frequency A is 0.05dB, and the third power loss value of the coupler and the chip input end radio frequency line under the frequency A can be calculated by substituting each numerical value into the formula (3).
Step 1105: and determining a fourth power loss value of the radio frequency line at the output end of the chip and the attenuator.
In this step, after the signal source, the signal source rf line, the chip output rf line, the attenuator, and the power meter are sequentially connected, the static calibration module may calculate a fourth power loss value of the chip output rf line and the attenuator at different frequencies according to the following formula (4):
Figure 919449DEST_PATH_IMAGE004
(4)
wherein, Δ W4Fourth power loss value W for characterizing RF lines and attenuators at the output of the chipSGFor characterizing the power, W, of the radio-frequency signal at the input of the signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1First power loss value, W, for characterizing signal sources and signal source radio frequency linesSFor characterizing the attenuated power of the attenuator.
For example, a signal source radio frequency line, a chip output end radio frequency line, an attenuator and a power meter are connected in sequence, when the frequency is A and the input value of the signal source is 0dB, the power value of the radio frequency signal detected by the power meter is-60.06 dB, the attenuation power of the attenuator with the first power loss value of 0.05dB of the signal source and the signal source radio frequency line under the frequency A is 60dB, and the fourth power loss value of the chip output end radio frequency line and the attenuator under the frequency A can be obtained by substituting each numerical value into the formula (4).
Step 1106: and determining fifth power loss values of the power amplifier, the coupler, the coupling end radio frequency line and the coupling end.
In this step, in the embodiment of the present invention, in the dynamic calibration component assembly, the signal source radio frequency line, the amplifier, the coupler, the chip output radio frequency line, and the auxiliary attenuator are sequentially connected, and the coupling end is connected to the coupler through the coupling end radio frequency line. After the dynamic calibration component combination is connected with the power meter and the signal source inputs the radio frequency signals with different frequency and power combinations, the dynamic calibration module calculates a fifth power loss value of the power amplifier, the coupler, the coupling end radio frequency line and the coupling end under different frequency and power combinations according to the following formula (5):
Figure 734477DEST_PATH_IMAGE005
(5)
wherein, Δ W5Fifth power loss value, W, for characterizing the amplifier, coupler, coupling end RF line and coupling end under RF signals of different frequency and power combinationsDFor increasing power of the power amplifier, WSGFor characterizing the power, W, of the radio-frequency signal at the input of the signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1For characterizing a first power loss value, AW, of a signal source and a radio frequency line of the signal source2Second power loss value, AW, for characterizing the secondary attenuator4And the fourth power loss value is used for representing the radio frequency line at the output end of the chip and the attenuator.
In this step, as in the previous example, the signal source rf line, the amplifier, the coupler, the chip output rf line, the auxiliary attenuator, and the power meter are sequentially connected, and the coupling end is connected to the coupler through the coupling end rf line. When the frequency is A and the input value of the signal source is 0dB, the first power loss value of the signal source and the radio frequency line of the signal source under the frequency A is 0.05dB, the third power loss value of the coupler and the chip output radio frequency line under the frequency A is 0.02dB, the second power loss value of the auxiliary attenuator under the frequency A is 0.01dB, the increased power of the power amplifier is 50dB, the power of the radio frequency signal detected by the power meter is 4.97dB, the power of the radio frequency signal detected by the coupling end is-0.15 dB, and the fifth power loss value of the power amplifier, the coupler, the radio frequency line of the coupling end and the coupling end under the frequency A and the input value of the signal source is 0.1dB is calculated by substituting all numerical values into a formula (5).
Step 1107: a sixth power loss value for the analyzer and the analyzer radio frequency line is determined.
In this step, in the embodiment of the present invention, in the dynamic calibration component assembly, the signal source radio frequency line, the amplifier, the coupler, the chip output radio frequency line, and the auxiliary attenuator are sequentially connected, and the coupling end is connected to the coupler through the coupling end radio frequency line. After connecting the dynamic calibration component assembly to the analyzer and analyzer rf line and inputting rf signals having different frequency and power combinations from the signal source, the dynamic calibration module calculates a sixth power loss value of the analyzer and analyzer rf line at the different frequency and power combinations according to the following equation (6):
Figure 235866DEST_PATH_IMAGE006
(6)
wherein, Δ W6Sixth power loss value, W, for characterizing the analyzer and analyzer RF line under RF signals of different frequency and power combinationsDFor increasing power of the power amplifier, WSGFor characterizing the power, W, of the radio-frequency signal at the input of the signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1For characterizing a first power loss value, AW, of a signal source and a radio frequency line of the signal source2Second power loss value, AW, for characterizing the secondary attenuator4And the fourth power loss value is used for representing the radio frequency line at the output end of the chip and the attenuator.
For example, in this step, a signal source rf line, a power amplifier, a coupler, a chip output rf line, an auxiliary attenuator, an analyzer, and an analyzer rf line are sequentially connected, and a coupling end is connected to the coupler through a coupling end rf line. When the frequency is A and the input value of the signal source is 0dB, the third power loss value of the coupler and the chip output radio frequency line under the frequency A is 0.02dB, the second power loss value of the auxiliary attenuator under the frequency A is 0.01dB, the power increase of the power amplifier is 50dB, the first power loss value of the signal source and the signal source radio frequency line under the frequency A is 0.05dB, the power of the radio frequency signal detected by the coupling end is-0.15 dB, the power of the radio frequency signal detected by the analyzer is 4.95dB, and the sixth power loss value of the analyzer and the analyzer radio frequency line under the frequency A and the input value of the signal source is 0dB is calculated by substituting all numerical values into a formula (6).
Step 1108: and determining a seventh power loss value of the reflection end and the reflection end radio frequency line.
In this step, in the embodiment of the present invention, in the dynamic calibration component assembly, the signal source radio frequency line, the amplifier, the coupler, the chip output radio frequency line, and the auxiliary attenuator are sequentially connected, and the coupling end is connected to the coupler through the coupling end radio frequency line. Then, the dynamic calibration component combination is connected with the radio frequency lines of the reflection end and the reflection end, and after radio frequency signals with different frequencies and power combinations are input from a signal source, a seventh power loss value of the radio frequency lines of the reflection end and the reflection end is calculated according to the following formula (7):
Figure 669383DEST_PATH_IMAGE007
(7)
wherein, Δ W7A seventh power loss value, W, for characterizing reflected end and reflected end RF lines under RF signals of different frequency and power combinationsRFLFor characterizing the power, AW, of the RF signal detected by the reflecting end2Second power loss value, AW, for characterizing the secondary attenuator3And the third power loss value is used for representing the radio frequency lines at the coupling end and the chip input end.
For example, in this step, a signal source rf line, a power amplifier, a coupler, a chip output rf line, an auxiliary attenuator, a reflection end rf line, and a reflection end are sequentially connected, and the coupling end is connected to the coupler through the coupling end rf line. If the power loss of each part is not considered, the power of the radio frequency signal detected by the reflecting end is 0dB because the chip to be tested does not exist in the calibration process of the radio frequency front end module testing machine. When the power loss of each component is considered, the power of the radio-frequency signal detected by the reflecting end is the sum of the power losses of the auxiliary attenuator, the coupler and the chip output radio-frequency line as well as the power losses of the reflecting end and the reflecting end radio-frequency line. When the frequency is A and the input value of the signal source is 0dB, the third power loss value of the coupler and the chip output radio frequency line under the frequency A is 0.02dB, the second power loss value of the auxiliary attenuator under the frequency A is 0.01dB, the power of the radio frequency signal detected by the reflecting end is-0.04 dB, and the seventh power loss value of the reflecting end and the reflecting end radio frequency line under the frequency A and the input value of the signal source is 0dB can be calculated by substituting all numerical values into a formula (7).
Step 1109: and correcting the test result of the radio frequency front-end module test machine.
In this step, in the embodiment of the present invention, the calibration module corrects the test result of the radio frequency front end module tester according to the first power loss value to the seventh power loss value.
For example, a signal source radio frequency line, a power amplifier, a coupler, a chip output radio frequency line, and an auxiliary attenuator are connected to the power meter, and the coupling end is connected to the coupler through a coupling end radio frequency line. When the signal source inputs 0dB, the power loss of the signal source and the radio frequency line of the signal source is 0.05dB, the increased power of the power amplifier is 50dB, and the power amplifier, the coupler, the radio frequency line of the coupling end and the coupling end are 0.1dB under the radio frequency signal with the frequency A and the power B. If the radio frequency signal detected by the coupling end is-0.15 dB, the power loss value of each component is added with the reading of the coupling end, namely the actual value of the radio frequency signal detected by the coupling end is 0 dB.
For another example, the signal source rf line, the amplifier, the coupler, the chip output rf line, and the auxiliary attenuator are connected to the power meter, and the coupling end is connected to the coupler through the coupling end rf line. When the signal source inputs 0dB, the power loss of the signal source and the radio frequency line of the signal source is 0.05dB, the increased power of the power amplifier is 50dB, and the power amplifier, the coupler, the radio frequency line of the coupling end and the coupling end are 0.1dB under the radio frequency signal with the frequency A and the power B. If the value of the radio frequency signal detected by the coupling end is an actual value, the power loss value of each component is added to be 0.15dB on the basis of the signal source input value of 0dB, and when the signal source input value is 0.15dB, the radio frequency signal detected by the coupling end is the actual value of 0 dB.
The embodiment of the invention also provides a calibration device for the radio frequency front-end module testing machine, which comprises the following components: at least one memory and at least one processor;
the at least one memory to store a machine readable program;
the at least one processor is configured to invoke the machine readable program to perform the method for calibrating a radio frequency front end module tester according to any embodiment of the present invention.
Embodiments of the present invention also provide a computer-readable medium storing instructions for causing a computer to perform a method for calibrating a radio frequency front end module tester as described herein. Specifically, a method or an apparatus equipped with a storage medium on which a software program code that realizes the functions of any of the above-described embodiments is stored may be provided, and a computer (or a CPU or MPU) of the method or the apparatus is caused to read out and execute the program code stored in the storage medium.
In this case, the program code itself read from the storage medium can realize the functions of any of the above-described embodiments, and thus the program code and the storage medium storing the program code constitute a part of the present invention.
Examples of the storage medium for supplying the program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (e.g., CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD + RW), a magnetic tape, a nonvolatile memory card, and a ROM. Alternatively, the program code may be downloaded from a server computer via a communications network.
Further, it should be clear that the functions of any one of the above-described embodiments may be implemented not only by executing the program code read out by the computer, but also by causing an operating system or the like operating on the computer to perform a part or all of the actual operations based on instructions of the program code.
Further, it is to be understood that the program code read out from the storage medium is written to a memory provided in an expansion board inserted into the computer or to a memory provided in an expansion module connected to the computer, and then causes a CPU or the like mounted on the expansion board or the expansion module to perform part or all of the actual operations based on instructions of the program code, thereby realizing the functions of any of the above-described embodiments.
It should be noted that not all steps and modules in the above flows and system structure diagrams are necessary, and some steps or modules may be omitted according to actual needs. The execution order of the steps is not fixed and can be adjusted as required. The system structure described in the above embodiments may be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by a plurality of physical entities, or some components in a plurality of independent devices may be implemented together.
In the above embodiments, the hardware module may be implemented mechanically or electrically. For example, a hardware module may comprise permanently dedicated circuitry or logic (such as a dedicated processor, FPGA or ASIC) to perform the corresponding operations. A hardware module may also include programmable logic or circuitry (e.g., a general-purpose processor or other programmable processor) that may be temporarily configured by software to perform the corresponding operations. The specific implementation (mechanical, or dedicated permanent, or temporarily set) may be determined based on cost and time considerations.
While the invention has been shown and described in detail in the drawings and in the preferred embodiments, it is not intended to limit the invention to the embodiments disclosed, and it will be apparent to those skilled in the art that various combinations of the code auditing means in the various embodiments described above may be used to obtain further embodiments of the invention, which are also within the scope of the invention.

Claims (10)

1. The calibration method of the radio frequency front end module testing machine is characterized by being used for calibrating the radio frequency front end module testing machine comprising a signal source, a coupling end, a reflection end, an analyzer, a power amplifier, a coupler, an attenuator, a signal source radio frequency line, a coupling end radio frequency line, a reflection end radio frequency line, a chip input end radio frequency line, a chip output end radio frequency line and an analyzer radio frequency line, and comprising the following steps:
after at least two of the signal source, the signal source radio frequency line, the coupler, the chip input end radio frequency line, the chip output end radio frequency line, the attenuator and the auxiliary attenuator are sequentially connected with a power meter respectively, determining a first power loss value of the signal source and the signal source radio frequency line, a second power loss value of the auxiliary attenuator, a third power loss value of the coupler and the chip input end radio frequency line and a fourth power loss value of the chip output end radio frequency line and the attenuator according to the power of the signal source input end radio frequency signal and the power of the radio frequency signal detected by the power meter;
after a dynamic calibration component combination is respectively connected with the power meter, the analyzer radio frequency line and the analyzer, and the reflection end radio frequency line and the reflection end, and radio frequency signals with different frequency and power combinations are input from the signal source, according to the power of the radio frequency signal at the input end of the signal source and the power of the radio frequency signals detected by the coupling end, the reflection end, the analyzer and the power meter, determining fifth power loss values of the power amplifier, the coupler, the coupling end radio frequency line and the coupling end, sixth power loss values of the analyzer and the analyzer radio frequency line, and seventh power loss values of the reflection end and the reflection end radio frequency line under the radio frequency signals with different frequency and power combinations, wherein in the dynamic calibration component combination, the signal source radio frequency line, the analyzer, and the reflection end radio frequency line, The power amplifier, the coupler, the chip output radio frequency line and the auxiliary attenuator are sequentially connected, and the coupling end is connected with the coupler through the coupling end radio frequency line;
and correcting the test result of the radio frequency front-end module test machine according to the first power loss value to the seventh power loss value.
2. The method of claim 1, further comprising:
and determining the power attenuation of the auxiliary attenuator according to the power gain of the chip to be tested and the power attenuation of the attenuator.
3. The method of claim 1, wherein determining a first power loss value for the signal source and the signal source radio frequency line comprises:
after the signal source, the signal source radio frequency line and the power meter are connected in sequence, calculating a first power loss value of the signal source and the signal source radio frequency line according to the following formula (1):
Figure 172802DEST_PATH_IMAGE001
(1)
wherein, Δ W1A first power loss value, W, for characterizing said signal source and said signal source radio frequency lineSGFor characterizing the power, W, of the radio-frequency signal at the input of said signal sourcePMFor characterizing the power of the radio frequency signal detected by the power meter.
4. The method of claim 1, wherein determining the second power loss value for the secondary attenuator comprises:
after the signal source, the signal source radio frequency line, the auxiliary attenuator and the power meter are connected in sequence, calculating a second power loss value of the auxiliary attenuator according to the following formula (2):
Figure 417839DEST_PATH_IMAGE002
(2)
wherein, Δ W2A second power loss value, W, for characterizing the secondary attenuatorFIs the attenuated power of the secondary attenuator, WSGFor characterizing the power, W, of the radio-frequency signal at the input of said signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1The first power loss value is used for characterizing the signal source and the radio frequency line of the signal source.
5. The method of claim 1,
determining a third power loss value for the coupler and the chip input rf line, comprising:
after the signal source, the signal source radio frequency line, the coupler, the chip input end radio frequency line and the power meter are sequentially connected, calculating a third power loss value of the coupler and the chip input end radio frequency line according to the following formula (3):
Figure 463155DEST_PATH_IMAGE003
(3)
wherein, Δ W3A third power loss value, W, for characterizing the coupler and the RF line at the chip inputSGFor characterizing the power, W, of the radio-frequency signal at the input of said signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1The first power loss value is used for characterizing the signal source and the radio frequency line of the signal source.
6. The method of claim 1,
determining a fourth power loss value of the chip output end radio frequency line and the attenuator, comprising:
after the signal source, the signal source radio frequency line, the chip output end radio frequency line, the attenuator and the power meter are sequentially connected, a fourth power loss value of the chip output end radio frequency line and the attenuator is calculated according to the following formula (4):
Figure 687725DEST_PATH_IMAGE004
(4)
wherein, Δ W4A fourth power loss value, W, for characterizing the attenuator and the RF line at the output of the chipSGFor characterizing the power, W, of the radio-frequency signal at the input of said signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1A first power loss value, W, for characterizing said signal source and said signal source radio frequency lineSFor characterizing the attenuated power of the attenuator.
7. The method of claim 1,
determining fifth power loss values of the power amplifier, the coupler, the coupling end rf line, and the coupling end under rf signals of different frequency and power combinations, including:
connecting a dynamic calibration component assembly with the power meter, wherein the signal source, the signal source radio frequency line, the power amplifier, the coupler, the chip output radio frequency line and the auxiliary attenuator in the dynamic calibration component assembly are sequentially connected, and the coupling end is connected with the coupler through the coupling end radio frequency line;
after radio frequency signals with different frequency and power combinations are input from the signal source, calculating a fifth power loss value of the radio frequency line at the output end of the chip and the attenuator according to the following formula (5):
Figure 33256DEST_PATH_IMAGE005
(5)
wherein, Δ W5A fifth power loss value, W, for characterizing the power amplifier, the coupler, the coupling end RF line and the coupling end under RF signals of different frequency and power combinationsDFor increasing power of said power amplifier, WSGFor characterizing the power, W, of the radio-frequency signal at the input of said signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1A first power loss value, Δ W, for characterizing said signal source and said signal source radio frequency line2A second power loss value, AW, for characterizing the secondary attenuator4And the fourth power loss value is used for representing the radio frequency line at the output end of the chip and the attenuator.
8. The method of claim 1,
determining a sixth power loss value for the analyzer and the analyzer radio frequency line at different frequency and power combined radio frequency signals, comprising:
connecting a dynamic calibration component assembly with the analyzer radio frequency line and the analyzer, wherein the signal source, the signal source radio frequency line, the power amplifier, the coupler, the chip output radio frequency line and the auxiliary attenuator in the dynamic calibration component assembly are sequentially connected, and the coupling end is connected with the coupler through the coupling end radio frequency line;
after inputting radio frequency signals having different frequency and power combinations from the signal source, calculating a sixth power loss value of the analyzer and the analyzer radio frequency line according to the following formula (6):
Figure 386877DEST_PATH_IMAGE006
(6)
wherein, Δ W6A sixth power loss value, W, for characterizing the analyzer and the analyzer RF line at RF signals of different frequency and power combinationsDFor increasing power of said power amplifier, WSGFor characterizing the power, W, of the radio-frequency signal at the input of said signal sourcePMFor characterizing the power, AW, of the radio-frequency signal detected by the power meter1A first power loss value, Δ W, for characterizing said signal source and said signal source radio frequency line2A second power loss value, AW, for characterizing the secondary attenuator4And the fourth power loss value is used for representing the radio frequency line at the output end of the chip and the attenuator.
9. The method according to any one of claims 1 to 8,
determining a seventh power loss value for the reflected end and the reflected end rf line for rf signals of different frequency and power combinations, comprising:
connecting a dynamic calibration component assembly with the reflection end and the reflection end radio frequency line, wherein the signal source, the signal source radio frequency line, the power amplifier, the coupler, the chip output radio frequency line and the auxiliary attenuator in the dynamic calibration component assembly are sequentially connected, and the coupling end is connected with the coupler through the coupling end radio frequency line;
after radio frequency signals with different frequency and power combinations are input from the signal source, calculating seventh power loss values of the reflection end and the reflection end radio frequency line according to the following formula (7):
Figure 919489DEST_PATH_IMAGE007
(7)
wherein, Δ W7A seventh power loss value, W, for characterizing said reflected end and said reflected end RF line at RF signals of different frequency and power combinationsRFLFor characterizing the power, AW, of the RF signal detected by said reflecting end2A second power loss value, AW, for characterizing the secondary attenuator3And the third power loss value is used for representing the coupling end and the radio frequency line at the input end of the chip.
10. The calibration device for the radio frequency front end module testing machine is characterized by being used for calibrating the radio frequency front end module testing machine comprising a signal source, a coupling end, a reflection end, an analyzer, a power amplifier, a coupler, an attenuator, a signal source radio frequency line, a coupling end radio frequency line, a reflection end radio frequency line, a chip input end radio frequency line, a chip output end radio frequency line and an analyzer radio frequency line, and comprising: the device comprises a static calibration module, a dynamic calibration module and a calibration module;
the static calibration module is used for determining a first power loss value of the signal source and a radio frequency line of the signal source, a second power loss value of an auxiliary attenuator, a third power loss value of the coupler and the radio frequency line of the chip input end and a fourth power loss value of the radio frequency line of the chip output end and the attenuator according to the power of the radio frequency signal at the input end of the signal source and the power of the radio frequency signal detected by the power meter;
the dynamic calibration module is configured to determine, according to the power of a radio frequency signal at the input end of the signal source and the powers of the radio frequency signals detected by the coupling end, the reflection end, the analyzer and the power meter, fifth power loss values of the power amplifier, the coupler, the coupling end radio frequency line and the coupling end, sixth power loss values of the analyzer and the analyzer radio frequency line, and seventh power loss values of the reflection end and the reflection end radio frequency line under radio frequency signals with different frequency and power combinations;
the calibration module is configured to correct the test result of the radio frequency front end module tester according to the first to fourth power loss values determined by the static calibration module and the fifth to seventh power loss values determined by the dynamic calibration module.
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