CN102207545A - Automatic testing method and system for transmission characteristic of microwave/millimeter wave vector modulator - Google Patents

Abstract

The invention discloses an automatic test system and method for the transmission characteristics of a microwave/millimeter wave vector modulator. The system includes a small signal transmission characteristic test system and a large signal transmission characteristic test system; the large signal transmission characteristic test system includes a large A signal power compression characteristic test system and a large signal phase compression characteristic test system; the present invention is flexible in configuration, not only suitable for automatic testing of transmission characteristics in various millimeter wave frequency bands, but also fully realizes the microwave/millimeter wave vector modulator under large signal conditions and Automatic testing of transmission characteristics under small-signal conditions; in addition, the present invention also overcomes the difficulties that current domestic microwave/millimeter-wave vector modulators lack in large-signal phase compression characteristics and large-signal power compression characteristics testing means and automatic testing systems, while avoiding The shortcomings of low efficiency, low precision, and many uncertain factors in manual testing are eliminated.

Description

Automatic testing method and system for transmission characteristics of microwave/millimeter wave vector modulator

technical field

The invention belongs to the technical field of testing and measuring of solid-state electronics, and relates to an automatic testing method and system for transmission characteristics of a microwave/millimeter wave vector modulator.

Background technique

Since the microwave/millimeter wave vector modulator can achieve any combination of signal amplitude and phase, the microwave/millimeter wave vector modulator can simultaneously realize the joint modulation of the microwave/millimeter wave beam amplitude and phase, which can form a new type of microwave /millimeter wave active phased array system, that is, it can realize the functions of multi-digit digital attenuator chip and multi-digit digital phase shifter chip in the existing microwave/millimeter wave active phased array system at the same time. The advantage of this is that : 1) The microwave/millimeter wave vector modulator can obtain better amplitude-phase consistency in a wide frequency band; 2) The direct carrier modulation characteristic of the microwave/millimeter wave vector modulator can replace the traditional receiving branch and transmitting branch inverters and filters.

Compared with multi-bit digital attenuator chips and multi-bit digital phase shifter chips, the microwave/millimeter wave vector modulator is beneficial to reduce the number of chips, reduce the chip size, reduce the number of DC pads in the chip, and reduce the peripheral drive circuit. implementation difficulty, while avoiding the performance deterioration caused by the cascaded use of multi-bit digital attenuators and multi-bit digital phase shifters.

When the microwave/millimeter wave vector modulator is applied to the transmitting branch of the T/R component in the active phased array radar system, considering that the microwave/millimeter wave vector modulator is at the input end of the final power amplifier, through the microwave/mm The wave vector modulator completes the weighting of the amplitude and phase of the transmitted signal. Since the final power amplifier needs to provide sufficient input power at the input port when it works normally, the transmission characteristics of the microwave/millimeter wave vector modulator under large signal conditions, That is, the test of power compression characteristics and phase compression characteristics is particularly important.

When the microwave/millimeter wave vector modulator is applied to the receiving branch of the T/R component in the active phased array radar system, considering that the microwave/millimeter wave vector modulator is at the output end of the low noise amplifier, through the microwave/millimeter wave The vector modulator completes the weighting of the amplitude and phase of the received signal. Since the receiving branch needs to provide sufficient noise figure and receiving gain for the subsequent circuit, the performance index of the insertion loss under the small signal condition of the microwave/millimeter wave vector modulator testing is particularly important.

At present, domestic millimeter-wave automatic testing methods are relatively lacking. On the one hand, millimeter-wave testing and measuring instruments are expensive, and some of them involve technical barriers set by foreign countries. For users, the purchase cost is high and the purchase cycle is long. There is a lack of ready-made test and measurement instruments; on the other hand, the current millimeter wave test is usually a manual test, which is carried out through the operation panel keys and the test results are recorded manually. Connect the corresponding instrument and the device under test for each test item. This manual test is not applicable when the number of microwave/millimeter wave vector modulators to be tested is large. For example, for active phased array radar T/R components, if An 8×8 array means that there are 64 sets of microwave/millimeter wave vector modulators, and a 64×64 array means that there are 4096 sets of microwave/millimeter wave vector modulators. If the test is not automated, the test will be quite cumbersome and time-consuming It is laborious and affects the measurement accuracy, and it is impossible to automatically analyze the test data.

Patent CN101394688 (published in 2009) technology discloses a method to measure the impedance curve and the temperature change of the voice coil for the moving coil speaker, calculate the power compression characteristic value at the characteristic frequency point through the non-thermal resistance calculation formula of the power compression characteristic, and then calculate the correction Formula correction coefficient, and finally get the power compression characteristic curve under different input power conditions. Patent CN1758064 (published in 2006) technology discloses a method and device for measuring alternating current (AC) and direct current (DC) characteristics of multiple semiconductor devices (CN1758064). Existing semiconductor measuring devices also have a measuring device and method based on optical testing means for the characteristics of semiconductor materials (CN101527273), a method and system for characterizing semiconductor materials based on optical testing means (CN1556390), a spectral-based Equipment for material property identification (CN101640830), a test method for light wave transmission characteristics in atmospheric channels (CN101814952A), etc. Although there are many technologies related to the measurement of transmission characteristics, there is no automatic measurement technology for the transmission characteristics of microwave/millimeter wave vector modulators so far.

Contents of the invention

The technical problem to be solved by the present invention is to provide an automatic test system for the transmission characteristics of microwave/millimeter wave vector modulators. Press the button to test, manually record the test results, low efficiency, high uncertainty of test results, and can overcome the current domestic microwave/millimeter wave vector modulator in the large signal phase compression characteristics and large signal power compression characteristics test methods and automatic test systems lack of difficulty.

In addition, the invention also provides an automatic testing method for the transmission characteristics of the microwave/millimeter wave vector modulator.

In order to solve the above technical problems, the present invention adopts the following technical solutions.

An automatic test system for microwave/millimeter wave vector modulator transmission characteristics, including a small signal transmission characteristic test system, and a large signal transmission characteristic test system; the large signal transmission characteristic test system includes a large signal power compression characteristic test system and a large signal transmission characteristic test system Signal phase compression characteristic test system.

As a preferred solution of the present invention, the small signal transmission characteristic testing system includes a vector network analyzer, a program-controlled DC stabilized power supply, a main control computer, a GPIB bus, and a GPIB-USB control card; the GPIB-USB control card and the main control The computer is connected, the vector network analyzer is connected with the GPIB-USB control card through the GPIB bus, the vector network analyzer is also connected with the microwave/millimeter wave vector modulator, the program-controlled DC regulated power supply is connected with the GPIB-USB control card through the GPIB bus, and the program control The DC regulated power supply is also connected to the microwave/millimeter wave vector modulator.

As another preferred solution of the present invention, the large signal power compression characteristic testing system includes a signal source, a spectrum analyzer, a program-controlled DC stabilized power supply, a main control computer, a GPIB-USB control card, and a GPIB bus; the GPIB- The USB control card is connected with the main control computer, the signal source is connected with the GPIB-USB control card through the GPIB bus, the signal source is also connected with the microwave/millimeter wave vector modulator, and the spectrum analyzer is controlled with the GPIB-USB through the GPIB bus The spectrum analyzer is also connected to the microwave/millimeter wave vector modulator, the program-controlled DC stabilized power supply is connected to the GPIB-USB control card through the GPIB bus, and the program-controlled DC stabilized power supply is also connected to the microwave/millimeter wave vector modulator .

As another preferred solution of the present invention, the large-signal phase compression characteristic test system also includes an output power test system of the power amplifier, an output power calibration system of the power amplifier, calibration equipment of the large-signal phase compression characteristic test system, and a large-signal The test equipment of the phase compression characteristic test system; the test equipment of the large-signal phase compression characteristic test system includes a main control computer, a GPIB bus, a GPIB-USB control card, a vector network analyzer, a first program-controlled DC regulated power supply, a second Program-controlled DC stabilized power supply and power amplifier; the GPIB-USB control card is connected to the main control computer, the vector network analyzer is connected to the GPIB-USB control card through the GPIB bus, and the vector network analyzer is also connected to the microwave/millimeter wave vector modulator The second program-controlled DC stabilized power supply is connected to the GPIB-USB control card through the GPIB bus. The second program-controlled DC stabilized power supply is also connected to the microwave/millimeter wave vector modulator. The first program-controlled DC stabilized power supply is connected to the GPIB controller through the GPIB bus. - the USB control card is connected, the first program-controlled DC stabilized power supply is also connected with a power amplifier, and the power amplifier is connected with a vector network analyzer and a microwave/millimeter wave vector modulator respectively.

As another preferred solution of the present invention, the output power test system of the power amplifier includes a vector network analyzer, a program-controlled DC power supply, a power meter, a power amplifier, a power sensor, a GPIB bus, a main control computer, and a GPIB-USB Control card; among them, the GPIB-USB control card is connected with the main control computer, and the vector network analyzer, program-controlled DC regulated power supply and power meter are respectively connected with the GPIB-USB control card through the GPIB bus; the power amplifier is connected with the vector network analyzer, The program-controlled DC stabilized power supply is connected with the power sensor, and the power sensor is connected with the power meter.

As another preferred solution of the present invention, the output power calibration system of the power amplifier includes a vector network analyzer, a power meter, a power sensor, a GPIB bus, a main control computer and a GPIB-USB control card; wherein the GPIB-USB control card and the main The control computer is connected, the vector network analyzer and the power meter are respectively connected to the GPIB-USB control card through the GPIB bus, and the power sensor is connected to the vector network analyzer and the power meter respectively.

As another preferred solution of the present invention, the calibration equipment of the large-signal phase compression characteristic testing system includes a vector network analyzer, a program-controlled DC regulated power supply, a power amplifier, a GPIB bus, a main control computer and a GPIB-USB control card; The GPIB-USB control card is connected with the main control computer, the program-controlled DC stabilized power supply and the vector network analyzer are respectively connected with the GPIB-USB control card through the GPIB bus, and the power amplifier is respectively connected with the vector network analyzer and the program-controlled DC stabilized power supply.

A test method for an automatic test system of a microwave/millimeter wave vector modulator transmission characteristic, comprising:

1) Small signal transmission characteristic test method;

2) Test method for large signal power compression characteristics;

3) Large signal phase compression characteristic test method.

As a preferred solution of the present invention, before the test of the small-signal transmission characteristics begins, the small-signal transmission characteristic calibration is first performed, and the vector network analyzer dual-port transmission characteristic calibration is completed to ensure that the calibration status of the vector network analyzer does not change after calibration , otherwise it is necessary to re-calibrate the two-port transmission characteristics of the vector network analyzer;

The small signal transmission characteristic calibration method comprises the following steps:

A01, set up a calibration system for the small signal transmission characteristic test system, and at the same time ensure that the RF ports, DC ports, USB ports of the main control computer, GPIB-USB control card, GPIB bus, power port, and grounding port of each test and measurement equipment are connected normally ;

A02, initialize the vector network analyzer, clear the SCPI register of the vector network analyzer;

A03, input start frequency, stop frequency, step frequency, intermediate frequency bandwidth, port input power, and average times from the main control computer;

A04, complete the calibration of the two-port transmission characteristics of the vector network analyzer, and save the calibration data;

The testing method of described small signal transmission characteristic comprises the following steps:

A1, set up a small signal transmission characteristic test system, and at the same time ensure that the RF port, DC port, main control computer USB port, GPIB-USB control card, GPIB bus, power port, and grounding port of each test and measurement equipment are connected normally;

A2, initialize the vector network analyzer and the program-controlled DC regulated power supply respectively, and clear the SCPI registers of the vector network analyzer and the program-controlled DC regulated power supply respectively;

A3, input the start frequency, stop frequency, step frequency, IF bandwidth, port input power, and average times in the main control computer, and at the same time select the output channels of the program-controlled DC regulated power supply as the microwave/millimeter wave vector modulator VI and VQ respectively DC bias source, input the starting voltage, ending voltage and step voltage of VI and VQ;

A4, put the initial frequency into the vector network analyzer as the current frequency, and at the same time put the initial voltage VI and VQ of the I and Q circuits into the corresponding output channels of the program-controlled DC regulated power supply as the current voltage values, and then the program-controlled DC [Output Power OFF] in the regulated power supply is set to [Output Power ON];

A5, test and read the amplitude value and phase value of the transmission characteristics of the vector network analyzer at the current frequency point;

A6, use the current voltage value VQ of the Q circuit plus the step voltage value as the test voltage value for the next Q circuit test, test and read the amplitude value and phase value of the transmission characteristic of the vector network analyzer at the current frequency point , and so on, until the end voltage value of the Q circuit is reached, and at this time, exit the cycle of the ground voltage value VQ of the Q circuit;

A7, add the step voltage to the voltage value VI of the current I road as the test voltage value during the next I road test, and put the initial voltage of the Q road voltage value into the corresponding output channel of the programmable power supply as the current voltage value, Test and read the amplitude value and phase value of the transmission characteristics of the vector network analyzer at the current frequency point, and so on, until the end voltage value of the I road is reached, and then exit the cycle of the voltage value VI of the I road;

A8, put the current frequency plus the step frequency into the vector network analyzer as the next frequency point, and put the initial voltage VI and VQ of the I and Q circuits into the corresponding corresponding voltages of the program-controlled DC stabilized voltage supply as the current voltage values. For the output channel, repeat the test steps from steps A6 to A7, and cycle like this until the frequency reaches the stop frequency. At this time, save all the test data, that is, frequency, VI, VQ, insertion loss, transmission phase, exit the frequency cycle, and at the same time program the DC [Output Power ON] in the regulated power supply is set to [Output Power OFF];

A9, call Mat1ab software, import all test data, namely frequency, VI, VQ, insertion loss, transmission phase, and draw VI, VQ, insertion loss curves and VI, VQ, transmission phase curves at fixed frequencies respectively.

As another preferred solution of the present invention, before the large-signal power compression characteristic test starts, the large-signal power compression characteristic calibration is first performed, and the calibration method includes the following steps:

B01, set up a test and calibration system for large signal power compression characteristics, and at the same time ensure that the RF port, DC port, USB port of the main control computer, GPIB-USB control card, GPIB bus, power port, and grounding port of each test and measurement equipment are connected normally;

B02, initialize the signal source and the spectrum analyzer respectively, and clear the SCPI registers of the signal source and the spectrum analyzer respectively;

B03, input the start frequency, stop frequency, step frequency, start power, stop power and step power of the signal source from the main control computer, and input the RBW, VBW and SPAN of the spectrum analyzer at the same time;

B04, connect the output port of the signal source to the input port of the spectrum analyzer, set the starting frequency and starting power as the current frequency and power respectively into the signal source, and then set [RF OFF] in the signal source to [RF ON] 】;

B05, test and read the amplitude value of the transmission characteristic of the spectrum analyzer at the current frequency point;

B06, put the current power plus the step power as the next power value, put it into the signal source, test and read the amplitude value of the transmission characteristics of the spectrum analyzer at the current frequency point and power value, and cycle like this, test and read in turn Take the amplitude value of the transmission characteristic of the spectrum analyzer at the current frequency point until the power value reaches the termination power, and exit the power cycle at this time;

B07, put the current frequency plus the step frequency into the signal source as the next frequency point, and put the initial power into the signal source as the current power value, repeat steps B05 to B06, and cycle like this, test and read the spectrum in turn The amplitude value of the transmission characteristic of the analyzer at the current frequency point, until the frequency reaches the stop frequency, at this time save all the test data, namely frequency, power, exit the frequency loop, and set [RF OFF] in the signal source to [RF OFF] at the same time ON]; complete the test of the output power of the signal source, that is, the step of calibrating the large signal power compression characteristics, and save all the test data at this time as the output power of the signal source, that is, the input power of the microwave/millimeter wave vector modulator;

The large signal power compression characteristic test comprises the following steps:

B1, complete the calibration of the output power of the signal source according to the large signal power compression characteristic calibration steps B01 to B07, and ensure that the calibration status of the signal source does not change after calibration, otherwise the calibration of the two-port transmission characteristics of the signal source needs to be completed again;

B2, set up a large signal power compression characteristic test system, and at the same time ensure that the RF port, DC port, USB port of the main control computer, GPIB-USB control card, GPIB bus, power port, and grounding port of each test and measurement equipment are connected normally;

B3, initialize the signal source, spectrum analyzer and program-controlled DC regulated power supply respectively, and clear the SCPI registers of the signal source, spectrum analyzer and program-controlled DC regulated power supply respectively;

B4, input the start frequency, stop frequency, step frequency, start power, stop power and step power of the signal source from the main control computer, and select the output channels of the program-controlled DC stabilized power supply as microwave/millimeter wave vector modulation respectively VI and VQ DC bias source, input VI and VQ start voltage, end voltage, step voltage, and input spectrum analyzer RBW, VBW, SPAN;

B5, put the initial frequency and initial power into the signal source as the current frequency and power respectively, and at the same time put the initial voltage VI and VQ of the I-channel and Q-channel as the current voltage values into the corresponding output channels of the program-controlled DC stabilized power supply , then set [Output Power OFF] in the program-controlled DC stabilized power supply to [Output Power ON], and set [RF OFF] in the signal source to [RF ON];

B6, test and read the amplitude value of the transmission characteristic of the spectrum analyzer at the current frequency point;

B7, add the voltage value VQ of the current Q circuit plus the step voltage value as the test voltage value for the next Q circuit test, then test and read the amplitude value of the transmission characteristic of the spectrum analyzer at the current frequency point, and so on. , until it reaches the end voltage value of the Q circuit, at this time, exit the cycle of the ground voltage value VQ of the Q circuit;

B8, add the step voltage to the voltage value VI of the current I road as the test voltage value during the next I road test, and put the initial voltage of the Q road voltage value into the corresponding output channel of the programmable power supply as the current voltage value, Test and read the amplitude value of the transmission characteristic of the spectrum analyzer at the current frequency point, and cycle like this until the termination voltage value of the I channel is reached, and then exit the cycle of the I channel voltage value VI.

B9, put the current power plus the step power as the next power value, put it into the signal source, test and read the amplitude value of the transmission characteristics of the spectrum analyzer at the current frequency point and power value, repeat steps B7 to B8, In such a cycle, test and read the amplitude value of the transmission characteristic of the spectrum analyzer at the current frequency point in turn, until the power value reaches the end power, and exit the power cycle at this time;

B10, put the current frequency plus the step frequency as the next frequency point into the signal source, and at the same time put the initial voltage VI and VQ of the I channel and the Q channel as the current voltage values into the corresponding output channels of the program-controlled DC stabilized power supply , and set the initial power as the current power value into the signal source, repeat steps B7 to B8, and so on, and then test and read the amplitude value of the transmission characteristics of the spectrum analyzer at the current frequency point, and so on, until the frequency reaches Stop the frequency, save all test data at this time, namely frequency, input power, VI, VQ, output power, exit the frequency loop, and set [Output Power ON] in the program-controlled DC stabilized voltage power supply to [Output Power OFF] at the same time, and Set [RF OFF] in the signal source to [RFON];

B11, call Matlab software, import all test data, that is, the input power of frequency, microwave/millimeter wave vector modulator, VI, VQ, output power of microwave/millimeter wave vector modulator, respectively draw in fixed frequency, I circuit voltage value The power compression curve of the input power of the microwave/millimeter wave vector modulator-the output power of the microwave/millimeter wave vector modulator under the voltage value VQ of the VI and Q circuit, that is, the microwave/millimeter wave vector modulator under different input power conditions The power compression curve, and the insertion loss curve under the VI-VQ-large signal condition at a fixed frequency and fixed input power, are compared with the insertion loss under the small signal condition, and finally determine the microwave/millimeter wave vector modulator The power compression characteristics of the microwave/millimeter wave vector modulator under different input power conditions.

As another preferred solution of the present invention, before the large-signal phase compression characteristic test begins, at first carry out the large-signal phase compression characteristic calibration; The described large-signal phase compression characteristic calibration method comprises: 31) output power calibration of the power amplifier; 32 ) output power test of the power amplifier; 33) transmission phase calibration of the power amplifier;

The output power calibration of described power amplifier comprises the following steps:

C11, set up the output power calibration system of the power amplifier, and at the same time ensure that the RF port, DC port, USB port of the main control computer, GPIB-USB control card, GPIB bus, power port, and grounding port of each test and measurement equipment are connected normally;

C12, initialize the vector network analyzer and the power meter respectively, and clear the SCPI registers of the vector network analyzer and the power meter respectively;

C13, input the start frequency, stop frequency, step frequency, intermediate frequency bandwidth, start power, port stop power, step power, average times from the main control computer, and input the output channel of the power meter, the input power sensor in the power meter Corresponding calibration table, average times of input power meter;

C14, complete the calibration of the power sensor and power meter, namely [Zero] and [Cal];

C15, put the initial power into the vector network analyzer as the current power;

C16, complete the calibration of the single-port output power of the vector network analyzer under the current power condition, and save the test data, that is, the input power (dBm) of the power amplifier;

C17, put the current power plus the step power into the vector network analyzer as the next power value, repeat step C16, and so on, until the power reaches the end power, and save the calibration data in turn, that is, frequency (GHz), input power ( dBm), exit the power cycle at this time;

The output power test of described power amplifier comprises the following steps:

C21, set up a test system for the output power of the power amplifier, and at the same time ensure that the RF ports, DC ports, USB ports of the main control computer, GPIB-USB control card, GPIB bus, power port, and grounding port of each test and measurement equipment are connected normally. And ensure that after the steps of calibrating the output power of the power amplifier are completed, the states of the power meter and the power sensor have not changed;

C22, respectively initialize the vector network analyzer, power meter, program-controlled DC regulated power supply, and clear the SCPI registers of the vector network analyzer, power meter, and program-controlled DC regulated power supply;

C23, input start frequency, stop frequency, step frequency, IF bandwidth, start power of port input power, stop power of port input power, step power of port input power, average times, and select programmable DC stabilized power supply The output channels of the power amplifier are respectively used as the VD and VG DC bias sources of the power amplifier, and respectively input the VD and VG supply voltages of the power amplifier during normal operation;

C24, put the initial frequency and initial power into the vector network analyzer as the current frequency and power respectively, and put VD and VG as the current voltage values into the corresponding output channels of the program-controlled DC stabilized power supply, and then set the program-controlled DC stabilized [Output Power OFF] in piezoelectric power supply is set to [Output Power ON];

C25, test and read the display power of the power meter at the current frequency point, that is, the output power of the power amplifier;

C26, put the current power plus the step power as the next power value, put it into the vector network analyzer, test and read the display power of the power meter at the current frequency point and power value, and cycle like this, test and read the power in turn Calculate the displayed power at the current frequency point until the power value reaches the cut-off power, then exit the power cycle;

C27, put the current frequency plus the step frequency into the vector network analyzer as the next frequency point, and put the initial power into the vector network analyzer as the current power value, repeat step C26, and cycle like this, test and Read the displayed power of the power meter at the current frequency point until the frequency reaches the stop frequency. At this time, save all the test data, that is, the frequency and output power, exit the frequency cycle, and at the same time set [Output Power ON] in the program-controlled DC regulated power supply. Set to [Output Power OFF];

The transmission phase calibration of the power amplifier includes the following steps:

C31, set up the transmission phase calibration system of the power amplifier, and at the same time ensure that the RF port, DC port, USB port of the main control computer, GPIB-USB control card, GPIB bus, power port, and grounding port of each test and measurement equipment are connected normally;

C32, respectively initialize the vector network analyzer and the program-controlled DC regulated power supply, and clear the SCPI registers of the vector network analyzer and the program-controlled DC regulated power supply respectively;

C33, input the start frequency, stop frequency, step frequency, IF bandwidth, start power, stop power, step power, average times, and select the output channels of the program-controlled DC stabilized power supply as the VD and VG DC of the power amplifier respectively Bias sources, respectively input the VD and VG supply voltages of the power amplifier during normal operation;

C34, put the initial power into the vector network analyzer as the current power, and put VD and VG as the current voltage values into the corresponding output channels of the program-controlled DC regulated power supply, and then set the [Output Power OFF] is set to [Output Power ON];

C35, complete the calibration of the two-port transmission characteristics of the vector network analyzer under the current power condition, and save the calibration data, that is, the transmission phase of the power amplifier;

C36, put the current power plus the stepping power into the vector network analyzer as the next power value, repeat step C35, and cycle like this, save the calibration data in turn, that is, the transmission phase of the power amplifier, until the input power of the port reaches the input power of the port At this time, exit the port input power cycle, and set [Output Power ON] in the program-controlled DC regulated power supply to [Output Power OFF].

The large signal phase compression characteristic testing method comprises the following steps:

C1, complete the calibration of the two-port transmission characteristics of the vector network analyzer according to the calibration steps of the large-signal phase compression characteristics, and ensure that the calibration status of the vector network analyzer does not change after calibration, otherwise it is necessary to re-complete the two-port transmission characteristics of the vector network analyzer calibration;

C2, set up a large signal phase compression characteristic test system, and at the same time ensure that the RF port, DC port, main control computer USB port, GPIB-USB control card, GPIB bus, power port, and grounding port of each test and measurement equipment are connected normally;

C3, initialize the vector network analyzer, the first program-controlled DC regulated power supply and the second program-controlled DC regulated power supply respectively, and clear the SCPI of the vector network analyzer, the first program-controlled DC regulated power supply and the second program-controlled DC regulated power supply respectively register;

C4, input the start frequency, stop frequency, step frequency, intermediate frequency bandwidth, start power, port stop power, step power, average times from the main control computer, and select the output channels of the first program-controlled DC stabilized power supply as Microwave/millimeter-wave vector modulator VI and VQ DC bias source, input the initial voltage, termination voltage, and step voltage of VI and VQ, and select the output channel of the second program-controlled DC regulated power supply as VD and VQ of the power amplifier respectively VG DC bias source, respectively input the VD and VG supply voltages of the power amplifier during normal operation;

C5, put the initial frequency and initial power into the vector network analyzer as the current frequency and power respectively, and put the initial voltage VI and VQ of the I and Q circuits into the second program-controlled DC stabilized power supply as the current voltage values At the same time, put VD and VG as the current voltage values into the corresponding output channels of the program-controlled DC regulated power supply, and then set [Output Power OFF] in the program-controlled DC regulated power supply to [Output Power ON];

C6, test and read the transmission phase of the vector network analyzer at the current frequency point;

C7, the voltage value VQ of the current Q circuit plus the step voltage value is used as the test voltage value for the next Q circuit test, then test and read the transmission phase of the spectrum analyzer at the current frequency point, and so on, until it reaches The end voltage value of the Q road, exit the cycle of the ground voltage value VQ of the Q road at this time;

C8, add the step voltage to the voltage value VI of the current I road as the test voltage value during the next I road test, and put the initial voltage of the Q road voltage value into the corresponding output channel of the programmable power supply as the current voltage value, Test and read the transmission phase of the spectrum analyzer at the current frequency point, and cycle like this until the end voltage value of the I road is reached, and then exit the cycle of the voltage value VI of the I road;

C9, add the current power value plus the step power as the next power value, put it into the vector network analyzer, test and read the transmission phase of the vector network analyzer at the current frequency point and power value, and repeat steps C6 to C8 , in this way, test and read the transmission phase of the vector network analyzer at the current frequency point in turn, until the power value reaches the end power, and exit the port input power cycle at this time;

C10, put the current frequency plus the step frequency into the vector network analyzer as the next frequency point, and put the initial voltage VI and VQ of the I and Q circuits into the second program-controlled DC regulated power supply respectively as the current voltage value The corresponding output channel of the vector network analyzer, and put the initial power into the vector network analyzer as the current power value, repeat steps C6 to C8, and so on, and test and read the transmission phase of the vector network analyzer at the current frequency point in turn, until the frequency When the stop frequency is reached, all the test data are saved at this time, namely the frequency, the input power of the power amplifier, VI, VQ, and the transmission phase of the microwave/millimeter wave vector modulator. [Output Power ON] in the program-controlled DC regulated power supply is set to [Output Power OFF];

C11, call Matlab software, import all test data, namely frequency, input power of microwave/millimeter wave vector modulator, VI, VQ, transmission phase of microwave/millimeter wave vector modulator, respectively plotted at fixed frequency and fixed input power The transmission phase curves of the VI-VQ-microwave/millimeter wave vector modulator are compared with the transmission phase under small signal conditions, and finally determine the phase compression characteristics of the microwave/millimeter wave vector modulator, that is, the microwave/millimeter wave vector Phase compression plot of the modulator under different input power conditions.

The beneficial effect of the present invention is that: the present invention is flexible in configuration, not only suitable for automatic testing of transmission characteristics of various millimeter-wave frequency bands, but also capable of fully realizing the automatic testing of transmission characteristics of microwave/millimeter-wave vector modulators under large-signal and small-signal conditions. In addition, the present invention also overcomes the difficulty that current domestic microwave/millimeter-wave vector modulators lack in large-signal phase compression characteristics and large-signal power compression characteristics testing means and automatic test systems, while avoiding the low efficiency and low efficiency of manual testing. The disadvantages are low accuracy and many uncertain factors.

Description of drawings

Fig. 1 is the structural representation of the calibration equipment of the small signal transmission characteristic testing system of the present invention;

Fig. 2 is the structural representation of the small signal transmission characteristic testing system of the present invention;

Fig. 3 is the structural representation of the calibration equipment of the large signal power compression characteristic test system of the present invention;

Fig. 4 is the structural representation of the large signal power compression characteristic testing system of the present invention;

FIG. 5 is a schematic structural diagram of an output power calibration system of a power amplifier according to the present invention;

Fig. 6 is the structural representation of the output power test system of the power amplifier of the present invention;

FIG. 7 is a schematic structural view of the calibration equipment of the large signal phase compression characteristic testing system of the present invention;

Fig. 8 is the structural representation of the test equipment of the large-signal phase compression characteristic test system of the present invention;

Fig. 9 is a flow chart of the method for testing small signal transmission characteristics of the present invention;

Fig. 10 is a flow chart of the calibration method of the small signal transmission characteristic testing system of the present invention;

Fig. 11 is a schematic flow chart of the large signal power compression characteristic testing method of the present invention;

Fig. 12 is a flow chart of the calibration method of the large signal power compression characteristic testing system of the present invention;

Fig. 13 is a schematic flow chart of the large signal phase compression characteristic testing method of the present invention;

14 is a schematic flowchart of a calibration method of a large signal phase compression characteristic testing system according to the present invention;

Fig. 15 is a schematic flow chart of the output power testing method of the power amplifier according to the present invention;

FIG. 16 is a schematic flowchart of a method for calibrating output power of a power amplifier according to the present invention.

Description of main component symbols:

1a, main control computer; 1b, GPIB-USB control card;

1c. Vector network analyzer; G. GPIB bus;

2a. Main control computer; 2b. GPIB-USB control card;

2c. Vector network analyzer; 2d. Program-controlled DC regulated power supply;

3a, main control computer; 3b, GPIB-USB control card;

3c, signal source; 3d, spectrum analyzer;

4a, main control computer; 4b, GPIB-USB control card;

4c. Signal source; 4d. Spectrum analyzer;

4e. Program-controlled DC regulated power supply; 5a. Main control computer;

5b, GPIB-USB control card; 5c, power meter;

5d, power sensor; 5e, vector network analyzer;

6a, main control computer; 6b, GPIB-USB control card;

6c. Power meter; 6d. Program-controlled DC regulated power supply;

6e, power amplifier; 6f, vector network analyzer;

6g, power sensor; 7a, main control computer;

7b. GPIB-USB control card; 7c. Program-controlled DC regulated power supply;

7d, power amplifier; 7e, vector network analyzer;

8a, main control computer; 8b, GPIB-USB control card;

8c, power amplifier; 8d, vector network analyzer;

8e, the first program-controlled DC regulated power supply; 8f, the second program-controlled DC regulated power supply.

Detailed ways

The purpose of the present invention is: 1) to overcome the defects of increasing test uncertainty factors and relatively low efficiency through the instrument operation panel keys for testing and manual recording of test results when measuring for batch microwave/millimeter wave vector modulators; 2) To solve the current domestic microwave/millimeter wave vector modulator in the large signal phase compression characteristics and large signal power compression characteristics of the test means and the lack of automatic test system difficulties.

The present invention proposes an automatic test system for the transmission characteristics of microwave/millimeter wave vector modulators, including: a small signal transmission characteristic test system, and a large signal transmission characteristic test system; the large signal transmission characteristic test system includes a large signal power compression characteristic test system and large signal phase compression characteristic test system.

The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings.

Embodiment one

This embodiment provides an automatic test system for the transmission characteristics of a microwave/millimeter wave vector modulator, including a small signal transmission characteristic test system and a large signal transmission characteristic test system; wherein the large signal transmission characteristic test system includes a large signal power compression characteristic test Equipment, large signal phase compression characteristic test equipment.

【Small signal transmission characteristics test system】

As shown in Figure 1, the calibration equipment of described small signal transmission characteristic test system comprises vector network analyzer 1c, GPIB bus G, GPIB-USB control card 1b, main control computer 1a; GPIB-USB control card 1b and main control computer 1a is connected, and the vector network analyzer 1c is connected with the GPIB-USB control card 1b through the GPIB bus G.

As shown in Figure 2, the small signal transmission characteristic test system includes a vector network analyzer 2c, a program-controlled DC power supply 2d, a main control computer 2a, a GPIB bus G, a GPIB-USB control card 2b; a GPIB-USB control card 2b It is connected with the main control computer 2a, the vector network analyzer 2c is connected with the GPIB-USB control card 2b through the GPIB bus G, the vector network analyzer 2c is also connected with the microwave/millimeter wave vector modulator, and the program-controlled DC stabilized power supply 2d is connected through the GPIB bus G is connected to the GPIB-USB control card 2b, and the program-controlled DC stabilized voltage power supply 2d is also connected to the microwave/millimeter wave vector modulator.

The main control computer is mainly used as a human-computer interaction terminal, which completes automatic testing, fault diagnosis, data processing, storage, analysis, and transmission of the DUT by executing the test program set, and displays or outputs the test results in an appropriate manner. The main control computer is used to store the test data of small signal transmission characteristics (amplitude parameters and phase parameters), large signal transmission characteristics (power compression parameters and phase compression parameters); it is used to set the test information of small signal transmission characteristics and large signal transmission characteristics (frequency information, power information, test equipment related parameter settings, etc.); it is also used to automatically complete the test process of corresponding parameters according to the test methods described in the small signal transmission characteristics and large signal transmission characteristics; and through the GPIB-USB control card , sending control commands for small signal transmission characteristics and large signal transmission characteristics, so that the bus corresponding to the GPIB-USB control card controls the test equipment for small signal transmission characteristics and large signal transmission characteristics to test and read test data.

The GPIB-USB control card is connected with the host computer, and is mainly used to use any host computer with a USB port as a full-featured, plug-and-play GPIB bus controller, and can control up to 14 programmable GPIB instruments.

The vector network analyzer is connected with the GPIB-USB control card through the GPIB bus to receive the frequency information, power information, intermediate frequency bandwidth information, and average number information set by the main control computer; the vector network analyzer is also connected with the microwave/millimeter wave vector modulator Connected to complete the test of the transmission characteristics of the microwave/millimeter wave vector modulator under small signal conditions, that is, to complete the test of the amplitude value (dB) and phase value (DEG) of the transmission characteristics.

The program-controlled DC stabilized power supply is connected to the GPIB-USB control card through the GPIB bus, and is used to receive the output channel information, Output OFF/ON information, and supply voltage information set by the main control computer; the program-controlled DC stabilized power supply is also connected with the microwave/millimeter wave vector The modulators are connected to complete the supply of the voltage value VI of the I channel and the voltage value VQ of the Q channel of the microwave/millimeter wave vector modulator.

The GPIB bus is mainly used to connect and control a plurality of programmable instruments, that is, vector network analyzers and program-controlled DC stabilized power supplies, to form traditional independent or local control instrument systems into an automatic test system.

【Large signal power compression characteristic test system】

As shown in Figure 3, the calibration equipment of described large-signal power compression characteristic testing system comprises signal source 3c, spectrum analyzer 3d, main control computer 3a, GPIB-USB control card 3b, GPIB bus G; Described GPIB-USB control The card 3b is connected with the main control computer 3a, the signal source 3c is connected with the GPIB-USB control card 3b through the GPIB bus G, the spectrum analyzer 3d is connected with the GPIB-USB control card 3b through the GPIB bus G, and the spectrum analyzer 3d Connect with signal source 3c.

As shown in Figure 4, described large-signal power compression characteristic test system comprises signal source 4c, spectrum analyzer 4d, program-controlled direct-current stabilized voltage power supply 4e, main control computer 4a, GPIB-USB control card 4b, GPIB bus G; The GPIB-USB control card 4b is connected with the main control computer 4a, and the signal source 4c is connected with the GPIB-USB control card 4b through the GPIB bus G, and the signal source 4c is also connected with the microwave/millimeter wave vector modulator, and the spectrum analyzer 4d is connected to the GPIB-USB control card 4b through the GPIB bus G, the spectrum analyzer 4d is also connected to the microwave/millimeter wave vector modulator, and the program-controlled DC stabilized power supply 4e is connected to the GPIB-USB control card 4b through the GPIB bus G, The program-controlled DC stabilized power supply 4e is also connected with the microwave/millimeter wave vector modulator.

The main control computer is mainly used as a human-computer interaction terminal, and completes automatic testing, fault diagnosis, data processing, storage, analysis, and transmission of the DUT by executing the test program set, and displays or outputs the test results in an appropriate manner.

The GPIB-USB control card is connected with the main control computer, which is mainly used to use any main control computer with a USB port as a full-featured, plug-and-play GPIB bus controller, and can control up to 14 programmable GPIB instrument.

The signal source is connected with the GPIB-USB control card through the GPIB bus, and is used to receive frequency information, power information, and RF OFF/ON information set by the main control computer; the signal source is also connected with the microwave/millimeter wave vector modulator for Complete the test of the transmission characteristics of the microwave/millimeter wave vector modulator under large signal conditions, that is, complete the power compression (dBm) test under large signal conditions.

The spectrum analyzer is connected with the GPIB-USB control card through the GPIB bus, and is used to receive frequency information, SPAN information, RBW information, and VBW information set by the main control computer; the spectrum analyzer is also connected with the microwave/millimeter wave vector modulator, It is used to complete the test of the amplitude value at the current output frequency point of the signal source.

The program-controlled DC stabilized power supply is connected to the GPIB-USB control card through the GPIB bus, and is used to receive output channel information, Output OFF/ON information, and supply voltage information set by the main control computer; the program-controlled DC stabilized power supply is also connected to the microwave/mm The wave vector modulator is connected to complete the supply of the voltage value VI of the I channel and the voltage value VQ of the Q channel of the microwave/millimeter wave vector modulator.

The GPIB bus is mainly used to connect and control multiple programmable instruments, namely signal sources, spectrum analyzers, and program-controlled DC regulated power supplies, to form traditional independent or local control instrument systems into an automatic test system.

【Large signal phase compression characteristic test system】

The large signal phase compression characteristic test system also includes a power amplifier output power test system, a power amplifier output power calibration system, a calibration device for the large signal phase compression characteristic test system, and a test device for the large signal phase compression characteristic test system.

As shown in Figure 5, the output power calibration system of described power amplifier comprises vector network analyzer 5e, power meter 5c, power sensor 5d, GPIB bus G, main control computer 5a and GPIB-USB control card 5b; Wherein GPIB-USB The control card 5b is connected to the main control computer 5a, the vector network analyzer 5e and the power meter 5c are respectively connected to the GPIB-USB control card 5b through the GPIB bus G, and the power sensor 5d is connected to the vector network analyzer 5e and the power meter 5c respectively.

As shown in Figure 6, the output power test system of the power amplifier includes a vector network analyzer 6f, a program-controlled DC stabilized power supply 6d, a power meter 6c, a power amplifier 6e, a power sensor 6g, a GPIB bus G, a main control computer 6a and GPIB-USB control card 6b; wherein the GPIB-USB control card 6b is connected to the main control computer 6a, the vector network analyzer 6f, the program-controlled DC stabilized voltage power supply 6d and the power meter 6c are respectively connected to the GPIB-USB control card 6b through the GPIB bus G connected; the power amplifier 6e is respectively connected to the vector network analyzer 6f, the program-controlled DC stabilized power supply 6d and the power sensor 6g, and the power sensor 6g is connected to the power meter 6c.

As shown in Figure 7, the calibration equipment of the large signal phase compression characteristic test system includes a vector network analyzer 7e, a program-controlled DC stabilized voltage supply 7c, a power amplifier 7d, a GPIB bus G, a main control computer 7a and a GPIB-USB control card 7b; the GPIB-USB control card 7b is connected to the main control computer 7a, and the program-controlled DC stabilized power supply 7c and the vector network analyzer 7e are respectively connected to the GPIB-USB control card 7b through the GPIB bus G, and the power amplifier 7d is connected to the vector network analyzer respectively. The network analyzer 7e is connected to the program-controlled DC stabilized power supply 7c.

As shown in Figure 8, the test equipment of described large-signal phase compression characteristic test system comprises main control computer 8a, GPIB bus G, GPIB-USB control card 8b, vector network analyzer 8d, the first program-controlled DC stabilized voltage power supply 8e, The second program-controlled DC stabilized power supply 8f, power amplifier 8c; the GPIB-USB control card 8b is connected with the main control computer 8a, the vector network analyzer 8d is connected with the GPIB-USB control card 8b through the GPIB bus G, and the vector network analyzer 8d is also connected with the microwave/millimeter wave vector modulator, the second program-controlled DC stabilized power supply 8f is connected with the GPIB-USB control card 8b through the GPIB bus G, and the second program-controlled DC stabilized power supply 8f is also connected with the microwave/millimeter wave vector modulator The first program-controlled DC stabilized power supply 8e is connected to the GPIB-USB control card 8b through the GPIB bus G, and the first program-controlled DC stabilized power supply 8e is also connected to the power amplifier 8c, and the power amplifier 8c is respectively connected to the vector network analyzer 8d and the microwave / mmWave vector modulator is connected.

As shown in Figure 8, the large signal phase compression characteristic testing system includes a main control computer, a GPIB bus, a GPIB-USB control card, a vector network analyzer, a first program-controlled DC stabilized power supply, a second program-controlled DC stabilized power supply, Power meter, power sensor, power amplifier;

The main control computer is mainly used as a human-computer interaction terminal, and completes automatic testing, fault diagnosis, data processing, storage, analysis, and transmission of the DUT by executing the test program set, and displays or outputs the test results in an appropriate manner.

The GPIB-USB control card is connected with the main control computer, so that any main control computer with a USB port can be used as a full-featured, plug-and-play GPIB bus controller, and can control up to 14 programmable GPIB instruments .

The vector network analyzer is connected with the GPIB-USB control card through the GPIB bus to receive the frequency information, power information, intermediate frequency bandwidth information, and average number information set by the main control computer; the vector network analyzer is also connected with the microwave/millimeter wave vector modulator Connected to complete the test of the transmission characteristics of the microwave/millimeter wave vector modulator under large signal conditions, that is, to complete the transmission phase (DEG) test under large signal conditions.

The second program-controlled DC regulated power supply is connected to the GPIB-USB control card through the GPIB bus, and is used to receive the output channel information, Output OFF/ON information, and supply voltage information set by the main control computer; the second program-controlled DC regulated power supply is also connected to the microwave connected to the microwave/millimeter wave vector modulator to complete the supply of the voltage value VI of the I channel and the voltage value VQ of the Q channel of the microwave/millimeter wave vector modulator.

The first program-controlled DC regulated power supply is connected to the GPIB-USB control card through the GPIB bus, and is used to receive the output channel information, Output OFF/ON information, and supply voltage information set by the main control computer; the first program-controlled DC regulated power supply is also connected with the power The amplifier is connected to supply the DC bias voltage (VD and VG) required for the normal operation of the power amplifier.

The power amplifier is connected with the vector network analyzer and the microwave/millimeter wave vector modulator respectively, and is used to generate sufficient output power in the microwave/millimeter wave vector modulator test frequency band, and completes the microwave/millimeter wave vector modulator under large signal conditions The test of the transmission characteristics is to complete the phase compression test of the transmission characteristics.

The power meter is connected to the GPIB-USB control card through the GPIB bus to receive the output channel information, average times information, and calibration table information set by the main control computer; the power meter is also connected to the power amplifier through the power sensor to complete the power amplifier. The test of output power during normal operation is the test of vector modulation input power.

The GPIB bus is mainly used to connect and control a plurality of programmable instruments, namely vector network analyzers, program-controlled DC stabilized voltage supplies, and to form traditional independent or local control instrument systems into an automatic test system.

The automatic test system for the transmission characteristics of the microwave/millimeter wave vector modulator described in the present invention is flexible in configuration, not only suitable for automatic testing of the transmission characteristics of various millimeter wave frequency bands, but also uses the GPIB bus technology to fully realize the microwave/millimeter wave vector modulator Automatic test of the transmission characteristics of the modulator under large-signal and small-signal conditions. The present invention not only overcomes the difficulties of current domestic microwave/millimeter-wave vector modulators in large-signal phase compression characteristics and large-signal power compression characteristics testing means and the lack of automatic test systems, but also avoids low efficiency, low accuracy, and low efficiency during manual testing. There are many shortcomings such as uncertain factors.

Embodiment two

This embodiment provides a test method for an automatic test system for the transmission characteristics of a microwave/millimeter wave vector modulator, the method comprising: 1) a small signal transmission characteristic test method; 2) a large signal power compression characteristic test method; 3) a large signal Phase compression characteristic test method.

1) Small signal transmission characteristic test method

Before the small-signal transmission characteristic test starts, the small-signal transmission characteristic calibration is performed first, and the vector network analyzer dual-port transmission characteristic calibration is completed to ensure that the calibration status of the vector network analyzer does not change after calibration, otherwise the vector network analysis needs to be completed again Calibration of the two-port transfer characteristics of the instrument.

The small signal transmission characteristic calibration method comprises the following steps:

A01, set up the small signal transmission characteristic test system calibration system as shown in Figure 1, and at the same time ensure that the RF port, DC port, USB port of the main control computer, GPIB-USB control card, GPIB bus, power port, grounding of each test and measurement equipment All ports are connected normally;

A02, initialize the vector network analyzer, clear the SCPI register of the vector network analyzer;

A03, input start frequency, stop frequency, step frequency, intermediate frequency bandwidth, port input power, and average times from the main control computer;

A04, complete the calibration of the two-port transmission characteristics of the vector network analyzer, and save the calibration data.

The testing method of described small signal transmission characteristic comprises the following steps:

A1, set up a small signal transmission characteristic test system as shown in Figure 2, and at the same time ensure that the RF ports, DC ports, USB ports of the main control computer, GPIB-USB control card, GPIB bus, power ports, and grounding ports of each test and measurement equipment are uniform. The connection is normal;

A2, initialize the vector network analyzer and the program-controlled DC regulated power supply respectively, and clear the SCPI registers of the vector network analyzer and the program-controlled DC regulated power supply respectively;

A3, input the start frequency, stop frequency, step frequency, IF bandwidth, port input power, and average times in the main control computer, and at the same time select the output channels of the program-controlled DC regulated power supply as the microwave/millimeter wave vector modulator VI and VQ respectively DC bias source, input the starting voltage, ending voltage and step voltage of VI and VQ;

A4, put the initial frequency into the vector network analyzer as the current frequency, and at the same time put the initial voltage VI and VQ of the I and Q circuits into the corresponding output channels of the program-controlled DC regulated power supply as the current voltage values, and then the program-controlled DC [Output Power OFF] in the regulated power supply is set to [Output Power ON];

A5, test and read the amplitude value (dB) and phase value (DEG) of the transmission characteristic of the vector network analyzer at the current frequency point;

A6, the voltage value VQ of the current Q circuit plus the step voltage value is used as the test voltage value during the next Q circuit test, and the amplitude value (dB) of the transmission characteristic of the vector network analyzer at the current frequency point is tested and read and the phase value (DEG), and so on, until the end voltage value of the Q circuit is reached, and at this time, the cycle of the ground voltage value VQ of the Q circuit is exited;

A7, add the step voltage to the voltage value VI of the current I road as the test voltage value during the next I road test, and put the initial voltage of the Q road voltage value into the corresponding output channel of the programmable power supply as the current voltage value, Test and read the amplitude value (dB) and phase value (DEG) of the transmission characteristics of the vector network analyzer at the current frequency point, and so on, until the end voltage value of the I channel is reached, and then exit the I channel voltage value VI. cycle;

A8, put the current frequency plus the step frequency into the vector network analyzer as the next frequency point, and put the initial voltage VI and VQ of the I and Q circuits into the corresponding corresponding voltages of the program-controlled DC stabilized voltage supply as the current voltage values. For the output channel, repeat the test steps from steps A6 to A7, and so on, until the frequency reaches the stop frequency, then save all the test data, namely frequency (GHz), VI (V), VQ (V), insertion loss (dB) , Transmission phase (DEG), exit the frequency cycle, and set [Output Power ON] in the program-controlled DC regulated power supply to [Output Power OFF] at the same time;

A9, call Matlab software, import all test data, namely frequency (GHz), VI (V), VQ (V), insertion loss (dB), transmission phase (DEG), respectively draw VI (V) at a fixed frequency , VQ (V), insertion loss (dB) curves and VI (V), VQ (V), transmission phase (DEG)) curves.

2) Large signal power compression characteristic test method

Before the large-signal power compression characteristic test starts, the large-signal power compression characteristic calibration is performed first, and the calibration method includes the following steps:

B01, set up a large-signal power compression characteristic test and calibration system as shown in Figure 3, and at the same time ensure that the RF ports, DC ports, USB ports of the main control computer, GPIB-USB control card, GPIB bus, power ports, and grounding of each test and measurement equipment All ports are connected normally;

B02, initialize the signal source and the spectrum analyzer respectively, and clear the SCPI registers of the signal source and the spectrum analyzer respectively;

B03, input the start frequency, stop frequency, step frequency, start power, stop power and step power of the signal source from the main control computer, and input the RBW, VBW and SPAN of the spectrum analyzer at the same time;

B04, connect the output port of the signal source to the input port of the spectrum analyzer, set the starting frequency and starting power as the current frequency and power respectively into the signal source, and then set [RF OFF] in the signal source to [RF ON] 】;

B05, test and read the amplitude value (dBm) of the transmission characteristic of the spectrum analyzer at the current frequency point;

B06, add the current power plus the step power as the next power value, put it into the signal source, test and read the amplitude value (dBm) of the transmission characteristics of the spectrum analyzer at the current frequency point and power value, and so on, in turn Test and read the amplitude value (dBm) of the transmission characteristic of the spectrum analyzer at the current frequency point until the power value reaches the end power, and exit the power cycle at this time;

B07, put the current frequency plus the step frequency into the signal source as the next frequency point, and put the initial power into the signal source as the current power value, repeat steps B05 to B06, and cycle like this, test and read the spectrum in turn The amplitude value (dBm) of the transmission characteristic of the analyzer at the current frequency point, until the frequency reaches the stop frequency, at this time save all the test data, namely frequency (GHz), power (dBm), exit the frequency cycle, and at the same time save the test data in the signal source [RF OFF] of [RF OFF] is set to [RF ON]; complete the test of the output power of the signal source, that is, the step of calibrating the large signal power compression characteristics, and save all the test data at this time as the output power of the signal source, that is, microwave/millimeter wave Input power to the vector modulator.

The large signal power compression characteristic test comprises the following steps:

B1, complete the calibration of the output power of the signal source according to the large signal power compression characteristic calibration steps B01 to B07, and ensure that the calibration status of the signal source does not change after calibration, otherwise the calibration of the two-port transmission characteristics of the signal source needs to be completed again;

B2, set up a large signal power compression characteristic test system as shown in Figure 4, and at the same time ensure that the RF ports, DC ports, USB ports of the main control computer, GPIB-USB control card, GPIB bus, power ports, and grounding ports of each test and measurement equipment All connections are normal;

B3, initialize the signal source, spectrum analyzer and program-controlled DC regulated power supply respectively, and clear the SCPI registers of the signal source, spectrum analyzer and program-controlled DC regulated power supply respectively;

B4, input the start frequency, stop frequency, step frequency, start power, stop power and step power of the signal source from the main control computer, and select the output channels of the program-controlled DC stabilized power supply as microwave/millimeter wave vector modulation respectively VI and VQ DC bias source, input VI and VQ start voltage, end voltage, step voltage, and input spectrum analyzer RBW, VBW, SPAN;

B5, put the initial frequency and initial power into the signal source as the current frequency and power respectively, and at the same time put the initial voltage VI and VQ of the I-channel and Q-channel as the current voltage values into the corresponding output channels of the program-controlled DC stabilized power supply , then set [Output Power OFF] in the program-controlled DC stabilized power supply to [Output Power ON], and set [RF OFF] in the signal source to [RF ON];

B6, test and read the amplitude value (dBm) of the transmission characteristic of the spectrum analyzer at the current frequency point;

B7, the voltage value VQ of the current Q circuit plus the step voltage value is used as the test voltage value during the next Q circuit test, and then test and read the amplitude value (dBm) of the transmission characteristic of the spectrum analyzer at the current frequency point , and so on, until the end voltage value of the Q circuit is reached, and at this time, exit the cycle of the ground voltage value VQ of the Q circuit;

B8, add the step voltage to the voltage value VI of the current I road as the test voltage value during the next I road test, and put the initial voltage of the Q road voltage value into the corresponding output channel of the programmable power supply as the current voltage value, Test and read the amplitude value (dBm) of the transmission characteristics of the spectrum analyzer at the current frequency point, and so on, until the end voltage value of the I channel is reached, and then exit the cycle of the I channel voltage value VI.

B9, add the current power plus the step power as the next power value, put it into the signal source, test and read the amplitude value (dBm) of the transmission characteristics of the spectrum analyzer at the current frequency point and power value, and repeat step B7 To B8, loop like this, test and read the amplitude value (dBm) of the transmission characteristic of the spectrum analyzer at the current frequency point in turn, until the power value reaches the stop power, and exit the power cycle at this time;

B10, put the current frequency plus the step frequency as the next frequency point into the signal source, and at the same time put the initial voltage VI and VQ of the I channel and the Q channel as the current voltage values into the corresponding output channels of the program-controlled DC stabilized power supply , and put the initial power into the signal source as the current power value, repeat steps B7 to B8, and so on, and then test and read the amplitude value (dBm) of the transmission characteristics of the spectrum analyzer at the current frequency point, and so on. Until the frequency reaches the stop frequency, save all the test data at this time, namely the frequency (GHz), input power (dBm), VI (V), VQ (V), output power (dBm), exit the frequency cycle, and at the same time program-controlled DC stabilizer Set [Output Power ON] in the piezo source to [Output Power OFF], and set [RF OFF] in the signal source to [RF ON];

B11, call Matlab software, import all test data, namely frequency (GHz), microwave/millimeter wave vector modulator input power (dBm), VI(V), VQ(V), microwave/millimeter wave vector modulator output Power (dBm), the input power (dBm) of the microwave/millimeter wave vector modulator plotted at a fixed frequency, the voltage value VI (V) of the I channel and the voltage value VQ (V) of the Q channel (dBm)-microwave/millimeter wave vector modulation The power compression curve of the output power (dBm) of the microwave/millimeter wave vector modulator is the power compression curve of the microwave/millimeter wave vector modulator under different input power conditions, and the power compression curve of the microwave/millimeter wave vector modulator at a fixed frequency and fixed input power (microwave/millimeter wave vector modulator Input power) VI(V)-VQ(V)-insertion loss curve under large signal conditions (by formula 1), respectively compared with the insertion loss under small signal conditions, and finally determine the microwave/millimeter wave vector modulator The power compression characteristics of the microwave/millimeter wave vector modulator under different input power conditions.

Insertion loss under large signal conditions (dB)@xxGHz (xxGHz represents the current test frequency) =

Output Power of Microwave/Millimeter Wave Vector Modulator (dBm)-

Input Power of Microwave/Millimeter Wave Vector Modulator (dBm) (1)

3) Large signal phase compression characteristic test method

Before the large-signal phase compression characteristic test starts, first carry out large-signal phase compression characteristic calibration; Described large-signal phase compression characteristic calibration method comprises: 31) output power calibration of power amplifier; 32) output power test of power amplifier; 33) Transmission phase calibration of power amplifiers.

31) The output power calibration of the power amplifier includes the following steps:

C11, set up the output power calibration system of the power amplifier as shown in Figure 5, and at the same time ensure that the RF ports, DC ports, USB ports of the main control computer, GPIB-USB control card, GPIB bus, power ports, and grounding ports of each test and measurement equipment All connections are normal;

C12, initialize the vector network analyzer and the power meter respectively, and clear the SCPI registers of the vector network analyzer and the power meter respectively;

C13, input the start frequency, stop frequency, step frequency, intermediate frequency bandwidth, start power, port stop power, step power, average times from the main control computer, and input the output channel of the power meter, the input power sensor in the power meter Corresponding calibration table, average times of input power meter;

C14, complete the calibration of the power sensor and power meter, namely [Zero] and [Cal];

C15, put the initial power into the vector network analyzer as the current power;

C16, complete the calibration of the single-port output power of the vector network analyzer under the current power condition, and save the test data, that is, the input power (dBm) of the power amplifier;

C17, put the current power plus the step power into the vector network analyzer as the next power value, repeat step C16, and so on, until the power reaches the end power, and save the calibration data in turn, that is, frequency (GHz), input power ( dBm), then exit the power cycle.

32) The output power test of the power amplifier includes the following steps:

C21, set up a test system for the output power of the power amplifier as shown in Figure 6, and at the same time ensure that the RF ports, DC ports, USB ports of the main control computer, GPIB-USB control card, GPIB bus, power ports, and grounding of each test and measurement equipment The ports are connected normally, and after the steps of output power calibration of the power amplifier are completed, the status of the power meter and power sensor has not changed;

C22, respectively initialize the vector network analyzer, power meter, program-controlled DC regulated power supply, and clear the SCPI registers of the vector network analyzer, power meter, and program-controlled DC regulated power supply;

C23, input start frequency, stop frequency, step frequency, IF bandwidth, start power of port input power, stop power of port input power, step power of port input power, average times, and select programmable DC stabilized power supply The output channels of the power amplifier are respectively used as the VD and VG DC bias sources of the power amplifier, and respectively input the VD and VG supply voltages of the power amplifier during normal operation;

C24, put the initial frequency and initial power into the vector network analyzer as the current frequency and power respectively, and put VD and VG as the current voltage values into the corresponding output channels of the program-controlled DC stabilized power supply, and then set the program-controlled DC stabilized [Output Power OFF] in piezoelectric power supply is set to [Output Power ON];

C25, test and read the display power (dBm) of the power meter at the current frequency point, that is, the output power (dBm) of the power amplifier;

C26, put the current power plus the step power as the next power value, put it into the vector network analyzer, test and read the display power (dBm) of the power meter at the current frequency point and power value, and cycle like this, test and Read the displayed power (dBm) of the power meter at the current frequency point until the power value reaches the end power, and exit the power cycle at this time;

C27, put the current frequency plus the step frequency into the vector network analyzer as the next frequency point, and put the initial power into the vector network analyzer as the current power value, repeat step C26, and cycle like this, test and Read the displayed power (dBm) of the power meter at the current frequency point until the frequency reaches the stop frequency. At this time, save all the test data, namely the frequency (GHz) and output power (dBm), exit the frequency cycle, and at the same time set the program-controlled DC stabilizer to [Output Power ON] in the piezo source is set to [Output Power OFF].

33) The transmission phase calibration of the power amplifier comprises the following steps:

C31, set up the transmission phase calibration system of the power amplifier as shown in Figure 7, and at the same time ensure that the RF ports, DC ports, USB ports of the main control computer, GPIB-USB control card, GPIB bus, power ports, and grounding ports of each test and measurement equipment All connections are normal;

C32, respectively initialize the vector network analyzer and the program-controlled DC regulated power supply, and clear the SCPI registers of the vector network analyzer and the program-controlled DC regulated power supply respectively;

C33, input the start frequency, stop frequency, step frequency, IF bandwidth, start power, stop power, step power, average times, and select the output channels of the program-controlled DC stabilized power supply as the VD and VG DC of the power amplifier respectively Bias sources, respectively input the VD and VG supply voltages of the power amplifier during normal operation;

C34, put the initial power into the vector network analyzer as the current power, and put VD and VG as the current voltage values into the corresponding output channels of the program-controlled DC regulated power supply, and then set the [Output Power OFF] is set to [Output Power ON];

C35, complete the calibration of the two-port transmission characteristics of the vector network analyzer under the current power condition, and save the calibration data, that is, the transmission phase (DEG) of the power amplifier;

C36, put the current power plus stepping power into the vector network analyzer as the next power value, repeat step C35, and so on, and save the calibration data in turn, that is, the transmission phase (DEG) of the power amplifier, until the port input power reaches The termination power of the port input power, exit the port input power cycle at this time, and set [Output Power ON] in the program-controlled DC regulated power supply to [Output Power OFF].

The large signal phase compression characteristic testing method comprises the following steps:

C1, complete the calibration of the two-port transmission characteristics of the vector network analyzer according to the calibration steps of the large-signal phase compression characteristics, and ensure that the calibration status of the vector network analyzer does not change after calibration, otherwise it is necessary to re-complete the two-port transmission characteristics of the vector network analyzer calibration;

C2, set up a large signal phase compression characteristic test system as shown in Figure 8, and at the same time ensure that the RF ports, DC ports, USB ports of the main control computer, GPIB-USB control card, GPIB bus, power ports, and ground ports of each test and measurement equipment All connections are normal;

C3, initialize the vector network analyzer, the first program-controlled DC regulated power supply and the second program-controlled DC regulated power supply respectively, and clear the SCPI of the vector network analyzer, the first program-controlled DC regulated power supply and the second program-controlled DC regulated power supply respectively register;

C4, input the start frequency, stop frequency, step frequency, intermediate frequency bandwidth, start power, port stop power, step power, average times from the main control computer, and select the output channels of the first program-controlled DC stabilized power supply as Microwave/millimeter-wave vector modulator VI and VQ DC bias source, input the initial voltage, termination voltage, and step voltage of VI and VQ, and select the output channel of the second program-controlled DC regulated power supply as VD and VQ of the power amplifier respectively VG DC bias source, respectively input the VD and VG supply voltages of the power amplifier during normal operation;

C5, put the initial frequency and initial power into the vector network analyzer as the current frequency and power respectively, and put the initial voltage VI and VQ of the I and Q circuits into the second program-controlled DC stabilized power supply as the current voltage values At the same time, put VD and VG as the current voltage values into the corresponding output channels of the program-controlled DC regulated power supply, and then set [Output Power OFF] in the program-controlled DC regulated power supply to [Output Power ON];

C6, test and read the transmission phase (DEG) of the vector network analyzer at the current frequency point;

C7, the voltage value VQ of the current Q circuit plus the step voltage value is used as the test voltage value for the next Q circuit test, then test and read the transmission phase (DEG) of the spectrum analyzer at the current frequency point, and so on , until it reaches the end voltage value of the Q circuit, at this time, exit the cycle of the ground voltage value VQ of the Q circuit;

C8, add the step voltage to the voltage value VI of the current I road as the test voltage value during the next I road test, and put the initial voltage of the Q road voltage value into the corresponding output channel of the programmable power supply as the current voltage value, Test and read the transmission phase (DEG) of the spectrum analyzer at the current frequency point, and so on, until the end voltage value of the I road is reached, at this time, exit the cycle of the voltage value VI of the I road;

C9, add the current power value plus the step power as the next power value, put it into the vector network analyzer, test and read the transmission phase (DEG) of the vector network analyzer at the current frequency point and power value, and repeat the steps From C6 to C8, loop like this, test and read the transmission phase (DEG) of the vector network analyzer at the current frequency point in turn, until the power value reaches the end power, and then exit the port input power cycle;

C10, put the current frequency plus the step frequency into the vector network analyzer as the next frequency point, and put the initial voltage VI and VQ of the I and Q circuits into the second program-controlled DC regulated power supply respectively as the current voltage value The corresponding output channel, and put the initial power into the vector network analyzer as the current power value, repeat steps C6 to C8, and so on, and test and read the transmission phase (DEG) of the vector network analyzer at the current frequency point in turn , until the frequency reaches the stop frequency, then save all the test data, namely the frequency (GHz), the input power of the power amplifier (dBm), VI (V), VQ (V), the transmission phase of the microwave/millimeter wave vector modulator ( DEG), exit the frequency cycle, and set [Output Power ON] in the second program-controlled DC regulated power supply and the first program-controlled DC regulated power supply to [Output Power OFF] at the same time;

C11, call Matlab software, import all test data, namely frequency (GHz), microwave/millimeter wave vector modulator input power (dBm), VI(V), VQ(V), microwave/millimeter wave vector modulator transmission Phase (DEG), respectively plotted at fixed frequency and fixed input power (the input power of the microwave/millimeter wave vector modulator, that is, the output power of the power amplifier), respectively, VI(V)-VQ(V)-microwave/millimeter wave vector The transmission phase (DEG) curve of the modulator is compared with the transmission phase under the small signal condition, and finally the phase compression characteristics of the microwave/millimeter wave vector modulator are determined, that is, the microwave/millimeter wave vector modulator under different input power conditions The phase compression curve below.

Embodiment Three

This embodiment describes in detail the transmission characteristic test method and automatic test system of the microwave/millimeter wave vector modulator of the present invention with reference to the accompanying drawings. The automatic test system for transmission characteristics of a microwave/millimeter wave vector modulator according to the present invention is composed of a small signal transmission characteristic test system, a large signal power compression characteristic test system, a large signal phase compression characteristic test system and other systems. Each system consists of test equipment, test instruments, automatic test control part and test software. The automatic test control part is composed of the main control computer, GPIB bus, and GPIB-USB control card. The user uses the test software running on the main control computer to operate the test instrument through the GPIB-USB control card and use the GPIB bus to read and save the test data. .

The block diagram of the small signal transmission characteristic test system is shown in Figure 2, including the main control computer 2a, GPIB-USB control card 2b, GPIB bus G, vector network analyzer 2c, and program-controlled DC regulated power supply 2d. The test is divided into two parts: small signal transmission characteristic test and small signal transmission characteristic calibration; it is used to test and save the insertion loss and transmission phase index of the microwave/millimeter wave vector modulator under small signal conditions.

The block diagram of the test system for large signal power compression characteristics is shown in Figure 4, including the main control computer 4a, GPIB-USB control card 4b, GPIB bus G, signal source 4c, spectrum analyzer 4d, and program-controlled DC stabilized power supply 4e. The test is divided into two parts: large signal power compression characteristic test and large signal power compression characteristic calibration; it is used to test and save the insertion loss and power compression index of microwave/millimeter wave vector modulator under large signal condition.

The composition block diagram of the large signal phase compression characteristic test system is shown in Figure 8, including the main control computer 8a, GPIB-USB control card 8b, GPIB bus G, power amplifier 8c, vector network analyzer 8d, and the first program-controlled DC regulated power supply 8e , The second program-controlled DC stabilized voltage power supply 8f. The test is divided into two parts: large signal phase compression characteristic test and large signal phase compression characteristic calibration; it is used to test and save the transmission phase and phase compression index of microwave/millimeter wave vector modulator under large signal condition.

The test method flow chart of the automatic test system of the microwave/millimeter wave vector modulator transmission characteristics of the present invention is as shown in Figure 9, mainly by bottom driver software (GPIB-USB control card driver etc.), operating system (windows operating system) , graphical programming software HP VEE, various application software (including large signal phase compression characteristic test software, large signal power compression characteristic test software, small signal transmission characteristic test software) and user interface; each test software cooperates with each test system, The user can complete the test of each test system through the user interface of each test software. Each application software is independently programmed for software related to the present invention, and the rest is a standard windows operating system or a standard driver program that comes with the relevant standard equipment. In the present invention, the test program running on the main control computer uses the GPIB bus to control the operation of the test instrument and read the test data through the GPIB-USB control card. Through the software user interface running on the main control computer, the test instrument can be directly controlled by instructions, instead of the panel button operation, and the test results can be read through the GPIB bus instead of manual reading; each test item basically meets the microwave/millimeter wave vector modulator Test requirements for transmission characteristics.

The test method of the automatic test system of the microwave/millimeter wave vector modulator transmission characteristic of the present invention comprises: 1) small signal transmission characteristic test method; 2) large signal power compression characteristic test method; 3) large signal phase compression characteristic test method.

The small signal transmission characteristic test system is used to test and record the transmission characteristic index of the microwave/millimeter wave vector modulator. Fig. 1 is a block diagram of a calibration system of a small signal transmission characteristic test system, and Fig. 10 is a flow chart of small signal transmission characteristic test calibration of the automatic test system for microwave/millimeter wave vector modulator transmission characteristics of the present invention. Fig. 2 is a block diagram of a small signal transmission characteristic testing system, and Fig. 9 is a flow chart of small signal transmission characteristic testing constituting the transmission characteristic automatic testing system for microwave/millimeter wave vector modulators of the present invention. As shown in Figure 2, the calibration system of the small signal transmission characteristic test system includes a vector network analyzer, a program-controlled DC regulated power supply, a GPIB bus, a main control computer and a GPIB-USB control card. Among them, the vector network analyzer and the program-controlled DC regulated power supply are the test instruments, and the GPIB bus is the system bus connected to the test instruments, which is used to control the synchronous scanning of the vector network analyzer and the program-controlled DC regulated power supply to test the transmission characteristics in the frequency band. The main control computer sets the instrument parameters and reads and records the test results through the GBIP bus. The small signal transmission characteristic test is divided into two steps: first, the calibration of the small signal transmission characteristic test system is carried out, and then the small signal transmission characteristic test is carried out.

The large signal power compression characteristic test system is used to test and record the insertion loss and power compression index of the microwave/millimeter wave vector modulator under the large signal condition. Fig. 3 is a block diagram of the calibration system of the large signal power compression characteristic test system, and Fig. 12 is a calibration flowchart of the large signal power compression characteristic test system constituting the transmission characteristic automatic test system of the microwave/millimeter wave vector modulator of the present invention. Fig. 4 is a large signal power compression characteristic test system, and Fig. 11 is a test flow chart of the large signal power compression characteristic test system constituting the transmission characteristic automatic test system of the microwave/millimeter wave vector modulator of the present invention. As shown in Figure 4, the large-signal power compression characteristic test system includes a signal source, a spectrum analyzer, a program-controlled DC regulated power supply, a GPIB bus, a main control computer and a GPIB-USB control card. Among them, the signal source, spectrum analyzer, and program-controlled DC regulated power supply are test instruments, and the GPIB bus is the system bus connected to the test instrument, which is used to control the signal source, spectrum analyzer, and program-controlled DC regulated power supply for synchronous scanning to perform in-band transmission characteristics test. The main control computer sets the instrument parameters and reads and records the test results through the GBIP bus. The test of the large signal power compression characteristic is divided into two steps: first, the calibration of the large signal power compression characteristic test system is carried out, and then the insertion loss and power compression characteristic test under the condition of large signal are carried out.

The large signal phase compression characteristic test system is used to test and record the insertion phase and phase compression index of the microwave/millimeter wave vector modulator under the large signal condition. Fig. 8 is a block diagram of a large signal phase compression characteristic testing system, and Fig. 13 is a test flow chart of the large signal phase compression characteristic testing system constituting the transmission characteristic automatic testing system of the microwave/millimeter wave vector modulator of the present invention. Fig. 6 is a block diagram of the calibration system of the large-signal phase compression characteristic test system—the output power calibration system of the power amplifier, and Fig. 14 is a flow chart of the output power calibration of the power amplifier. Fig. 7 is a block diagram of the calibration system of the large signal phase compression characteristic test system—the output power test system of the power amplifier, and Fig. 15 is a flow chart of the output power test of the power amplifier. FIG. 8 is a block diagram of the calibration system of the large signal phase compression characteristic test system—the transmission phase calibration system of the power amplifier, and FIG. 16 is a flow chart of the transmission phase calibration of the power amplifier. The purpose of calibration is to respectively determine the output power of the vector network analyzer port within the test frequency band; the input power of the microwave/millimeter wave vector modulator, that is, the output power of the power amplifier; and bring the power amplifier into the entire calibration system to complete the whole set Calibration of system phase transfer characteristics.

As shown in Figure 5, the calibration system of the large-signal phase compression characteristic test system—the output power calibration system of the power amplifier includes at least a vector network analyzer, a power meter, a power sensor, a GPIB bus, a main control computer and a GPIB-USB control card . Among them, the vector network analyzer, power meter and power sensor are test instruments, and the GPIB bus is the system bus connecting the test instruments to control the synchronous scanning of the vector network analyzer and power meter to test the transmission characteristics in the frequency band. The main control computer sets the instrument parameters and reads and records the test results through the GBIP bus.

As shown in Figure 6, the calibration system of the large-signal phase compression characteristic test system—the output power test system of the power amplifier includes at least a vector network analyzer, a power amplifier program-controlled DC regulated power supply, a power meter, a power amplifier, a power sensor, and a GPIB Bus, main control computer and GPIB-USB control card. Among them, the vector network analyzer, power amplifier, program-controlled DC regulated power supply, power meter, and power sensor are test instruments, and the GPIB bus is the system bus connected to the test instrument to control the vector network analyzer, program-controlled DC regulated power supply, and power meter. Synchronous scanning to test the transmission characteristics in the frequency band. The main control computer sets the instrument parameters and reads and records the test results through the GBIP bus.

As shown in Figure 7, the calibration equipment of the large-signal phase compression characteristic test system includes a vector network analyzer, a program-controlled DC regulated power supply, a power amplifier, a GPIB bus, a main control computer and a GPIB-USB control card. Among them, the vector network analyzer, power amplifier, and program-controlled DC regulated power supply are test instruments, and the GPIB bus is the system bus connected to the test instruments, which is used to control the synchronous scanning of the vector network analyzer and the program-controlled DC regulated power supply, and to test the transmission characteristics in the frequency band. test. The main control computer sets the instrument parameters and reads and records the test results through the GBIP bus.

As shown in Figure 8, the large-signal phase compression characteristic test system includes at least a vector network analyzer, a first program-controlled DC regulated power supply, a power amplifier, a second program-controlled DC regulated power supply, a GPIB bus, a main control computer and a GPIB-USB control card. Among them, the vector network analyzer, the first program-controlled DC regulated power supply, the power amplifier, and the second program-controlled DC regulated power supply are test instruments, and the GPIB bus is the system bus connecting the test instruments to control the vector network analyzer, the first program-controlled DC The regulated power supply and the second program-controlled DC regulated power supply are scanned synchronously to test the transmission characteristics within the frequency band. The main control computer sets the instrument parameters and reads and records the test results through the GBIP bus.

The large signal phase compression characteristic test is divided into two steps: first, the calibration of the large signal phase compression characteristic test system is carried out, including at least the output power calibration of the power amplifier, the output power test of the power amplifier, and the transmission phase calibration of the power amplifier, followed by Test of interpolation phase and phase compression characteristics under large signal conditions.

The present invention is an automatic test system and method for the transmission characteristics of microwave/millimeter wave vector modulators. The scheme is flexible in configuration, and not only performs frequency expansion on the basis of commonly used microwave testing and measuring instruments, but is suitable for testing the transmission characteristics of various millimeter wave frequency bands. The automatic test system, and the use of GPIB bus technology, can fully realize the automatic test field of the transmission characteristics of the microwave/millimeter wave vector modulator under the large signal condition and the small signal condition, which not only overcomes the current domestic microwave/millimeter wave vector modulator. Large-signal phase compression characteristics and large-signal power compression characteristics test methods and the lack of difficulties in automatic test systems, while avoiding the shortcomings of low efficiency, low accuracy, and many uncertain factors in manual testing. It mainly realizes the automatic test of the transmission characteristics of various microwave/millimeter wave vector modulators, especially the high-efficiency test of the transmission characteristics (power compression characteristics and phase compression characteristics) of microwave/millimeter wave vector modulators under large signal conditions, and High-efficiency test of transmission characteristics (transmission phase and insertion loss) under small signal conditions.

The description and application of the present invention are illustrative and are not intended to limit the scope of the present invention to the examples described above. Variations and changes to the embodiments disclosed herein are possible, and substitutions and equivalents for various components of the embodiments are known to those of ordinary skill in the art. It should be clear to those skilled in the art that the present invention can be realized in other forms, structures, arrangements, proportions, and with other elements, materials and components without departing from the spirit or essential characteristics of the present invention.

Claims (13)

1. the Auto-Test System of a microwave/millimeter wave vector modulator transport property is characterized in that: comprise small-signal measuring transmission loss system, and large-signal measuring transmission loss system; Described large-signal measuring transmission loss system comprises large-signal power compression characteristic test system and large-signal phase place compression property test macro.

2. the Auto-Test System of microwave/millimeter wave vector modulator transport property according to claim 1 is characterized in that: described small-signal measuring transmission loss system comprises vector network analyzer (2c), program control D.C. regulated power supply (2d), main control computer (2a), gpib bus (G), GPIB-USB control card (2b); GPIB-USB control card (2b) links to each other with main control computer (2a), vector network analyzer (2c) links to each other with GPIB-USB control card (2b) by gpib bus (G), vector network analyzer (2c) also links to each other with the microwave/millimeter wave vector modulator, program control D.C. regulated power supply (2d) links to each other with GPIB-USB control card (2b) by gpib bus (G), and program control D.C. regulated power supply (2d) also links to each other with the microwave/millimeter wave vector modulator.

3. the Auto-Test System of microwave/millimeter wave vector modulator transport property according to claim 2 is characterized in that: the correcting device of described small-signal measuring transmission loss system comprises vector network analyzer (1c), gpib bus (G), GPIB-USB control card (1b), main control computer (1a); GPIB-USB control card (1b) links to each other with main control computer (1a), and vector network analyzer (1c) links to each other with GPIB-USB control card (1b) by gpib bus (G).

4. the Auto-Test System of microwave/millimeter wave vector modulator transport property according to claim 1 is characterized in that: described large-signal power compression characteristic test system comprises signal source (4c), spectrum analyzer (4d), program control D.C. regulated power supply (4e), main control computer (4a), GPIB-USB control card (4b), gpib bus (G); Described GPIB-USB control card (4b) links to each other with main control computer (4a), described signal source (4c) links to each other with GPIB-USB control card (4b) by gpib bus (G), signal source (4c) also links to each other with the microwave/millimeter wave vector modulator, described spectrum analyzer (4d) links to each other with GPIB-USB control card (4b) by gpib bus (G), spectrum analyzer (4d) also links to each other with the microwave/millimeter wave vector modulator, described program control D.C. regulated power supply (4e) links to each other with GPIB-USB control card (4b) by gpib bus (G), and program control D.C. regulated power supply (4e) also links to each other with the microwave/millimeter wave vector modulator.

5. the Auto-Test System of microwave/millimeter wave vector modulator transport property according to claim 4 is characterized in that: the correcting device of described large-signal power compression characteristic test system comprises signal source (3c), spectrum analyzer (3d), main control computer (3a), GPIB-USB control card (3b), gpib bus (G); Described GPIB-USB control card (3b) links to each other with main control computer (3a), described signal source (3c) links to each other with GPIB-USB control card (3b) by gpib bus (G), described spectrum analyzer (3d) links to each other with GPIB-USB control card (3b) by gpib bus (G), and spectrum analyzer (3d) links to each other with signal source (3c).

6. the Auto-Test System of microwave/millimeter wave vector modulator transport property according to claim 1 is characterized in that: described large-signal phase place compression property test macro also comprises the output power test macro of power amplifier, the output power calibration system of power amplifier, the correcting device of large-signal phase place compression property test macro and the testing apparatus of large-signal phase place compression property test macro; The testing apparatus of described large-signal phase place compression property test macro comprises main control computer (8a), gpib bus (G), GPIB-USB control card (8b), vector network analyzer (8d), the first program control D.C. regulated power supply (8e), the second program control D.C. regulated power supply (8f), power amplifier (8c); Described GPIB-USB control card (8b) links to each other with main control computer (8a), vector network analyzer (8d) links to each other with GPIB-USB control card (8b) by gpib bus (G), vector network analyzer (8d) also links to each other with the microwave/millimeter wave vector modulator, the second program control D.C. regulated power supply (8f) links to each other with GPIB-USB control card (8b) by gpib bus (G), the second program control D.C. regulated power supply (8f) also links to each other with the microwave/millimeter wave vector modulator, the first program control D.C. regulated power supply (8e) links to each other with GPIB-USB control card (8b) by gpib bus (G), the first program control D.C. regulated power supply (8e) also links to each other with power amplifier (8c), and power amplifier (8c) links to each other with the microwave/millimeter wave vector modulator with vector network analyzer (8d) respectively.

7. the Auto-Test System of microwave/millimeter wave vector modulator transport property according to claim 6 is characterized in that: the output power test macro of described power amplifier comprises vector network analyzer (6f), program control D.C. regulated power supply (6d), power meter (6c), power amplifier (6e), power sensor (6g), gpib bus (G), main control computer (6a) and GPIB-USB control card (6b); Wherein GPIB-USB control card (6b) links to each other with main control computer (6a), and vector network analyzer (6f), program control D.C. regulated power supply (6d) and power meter (6c) link to each other with GPIB-USB control card (6b) by gpib bus (G) respectively; Power amplifier (6e) links to each other with vector network analyzer (6f), program control D.C. regulated power supply (6d) and power sensor (6g) respectively, and power sensor (6g) links to each other with power meter (6c).

8. the Auto-Test System of microwave/millimeter wave vector modulator transport property according to claim 6 is characterized in that: the output power calibration system of described power amplifier comprises vector network analyzer (5e), power meter (5c), power sensor (5d), gpib bus (G), main control computer (5a) and GPIB-USB control card (5b); Wherein GPIB-USB control card (5b) links to each other with main control computer (5a), vector network analyzer (5e) links to each other with GPIB-USB control card (5b) by gpib bus (G) respectively with power meter (5c), and power sensor (5d) links to each other with power meter (5c) with vector network analyzer (5e) respectively.

9. the Auto-Test System of microwave/millimeter wave vector modulator transport property according to claim 6 is characterized in that: the correcting device of described large-signal phase place compression property test macro comprises vector network analyzer (7e), program control D.C. regulated power supply (7c), power amplifier (7d), gpib bus (G), main control computer (7a) and GPIB-USB control card (7b); Described GPIB-USB control card (7b) links to each other with main control computer (7a), program control D.C. regulated power supply (7c) links to each other with GPIB-USB control card (7b) by gpib bus (G) respectively with vector network analyzer (7e), and power amplifier (7d) links to each other with program control D.C. regulated power supply (7c) with vector network analyzer (7e) respectively.

10. the method for testing of the Auto-Test System of any described microwave/millimeter wave vector modulator transport property of claim 1 to 9 is characterized in that, comprising:

1) small-signal measuring transmission loss method;

2) large-signal power compression characteristic test method;

3) large-signal phase place compression property method of testing.

11. the method for testing of the Auto-Test System of microwave/millimeter wave vector modulator transport property according to claim 10, it is characterized in that: before the test of small-signal transport property begins, at first carry out the calibration of small-signal transport property, finish the calibration of vector network analyzer dual-port transport property, guarantee to calibrate back vector network analyzer align mode and do not change, vector network analyzer dual-port transport property is calibrated otherwise need finish again;

Described small-signal transport property calibration steps may further comprise the steps:

A01, set up the calibration system of small-signal measuring transmission loss system, guarantee that simultaneously prevention at radio-frequency port, DC port, main control computer USB port, GPIB-USB control card, gpib bus, power port, the grounding ports of each T ﹠ M equipment all connects normally;

A02, the initialization vector network analyzer empties the SCPI register of vector network analyzer;

A03 is from main control computer input initial frequency, termination frequency, step frequency, intermediate-frequency bandwidth, port power input, average time;

A04 finishes the calibration of vector network analyzer dual-port transport property, preserves calibration data;

The method of testing of described small-signal transport property may further comprise the steps:

A1 is set up small-signal measuring transmission loss system, guarantees that simultaneously prevention at radio-frequency port, DC port, main control computer USB port, GPIB-USB control card, gpib bus, power port, the grounding ports of each T ﹠ M equipment all connects normally;

A2 distinguishes initialization vector network analyzer and program control D.C. regulated power supply, empties the SCPI register of vector network analyzer and program control D.C. regulated power supply respectively;

A3, at main control computer input initial frequency, termination frequency, step frequency, intermediate-frequency bandwidth, port power input, average time, the output channel of selecting program control D.C. regulated power supply is simultaneously imported starting potential, final voltage, the stepped voltage of VI and VQ respectively as microwave/millimeter wave vector modulator VI and VQ direct current biasing source;

A4, initial frequency is inserted vector network analyzer as current frequency, simultaneously I road and Q road starting potential VI and VQ are inserted the corresponding output channel of program control D.C. regulated power supply respectively as current magnitude of voltage, subsequently [Output Power OFF] in the program control D.C. regulated power supply is set to [Output Power ON];

A5 tests and reads the range value and the phase value of the transport property of vector network analyzer under current Frequency point;

A6, test voltage value when the magnitude of voltage VQ on current Q road is added the stepped voltage value as next Q drive test examination, test and read the range value and the phase value of the transport property of vector network analyzer under current Frequency point, so circulation, until the final voltage value that reaches the Q road, withdraw from the circulation of Q road ground voltage value VQ this moment;

A7, test voltage value when the magnitude of voltage VI on current I road is added stepped voltage as next I drive test examination, and the starting potential of Q road magnitude of voltage is inserted the corresponding output channel of programmable power supply as current magnitude of voltage, test and read the range value and the phase value of the transport property of vector network analyzer under current Frequency point, so circulation, until the final voltage value that reaches the I road, withdraw from the circulation of I road magnitude of voltage VI this moment;

A8, current frequency is added that step frequency inserts in the vector network analyzer as next Frequency point, and I road and Q road starting potential VI and VQ are inserted the corresponding output channel of program control D.C. regulated power supply respectively as current magnitude of voltage, repeat the testing procedure of steps A 6 to A7, so circulation, reach the termination frequency until frequency, preserve whole test datas this moment, be frequency, VI, VQ, insertion loss, transmission phase place, withdraw from the frequency circulation, simultaneously [Output Power ON] in the program control D.C. regulated power supply is set to [Output Power OFF];

A9 calls Matlab software, imports whole test datas, and promptly frequency, VI, VQ, insertion loss, transmission phase place are plotted in VI, VQ, insertion damage curve figure and VI, VQ, transmission phase curve figure under the fixed frequency respectively.

12. the method for testing of the Auto-Test System of microwave/millimeter wave vector modulator transport property according to claim 10, it is characterized in that, before the characteristic test of large-signal power compression begins, at first carry out the calibration of large-signal power compression characteristic, this calibration steps may further comprise the steps:

B01, set up large-signal power compression characteristic test calibration system, guarantee that simultaneously prevention at radio-frequency port, DC port, main control computer USB port, GPIB-USB control card, gpib bus, power port, the grounding ports of each T ﹠ M equipment all connects normally;

B02 distinguishes initializing signal source and spectrum analyzer, empties the SCPI register of signal source and spectrum analyzer respectively;

B03 is from initial frequency, termination frequency, step frequency, initial power, termination power, stepping power, RBW, VBW, the SPAN of input spectrum analyser simultaneously of main control computer input signal source;

B04 is connected the signal source output port with the spectrum analyzer input port, initial frequency and initial power are inserted signal source as current frequency and power respectively, subsequently [RF OFF] in the signal source is set to [RF ON];

B05 tests and reads the range value of the transport property of spectrum analyzer under current Frequency point;

B06, current power is added that stepping power is as next performance number, insert signal source, test and read the range value of the transport property of spectrum analyzer under current Frequency point and performance number, so circulation, test and read the range value of the transport property of spectrum analyzer under current Frequency point successively, reach termination power, withdraw from power cycle this moment until performance number;

B07, current frequency is added that step frequency inserts in the signal source as next Frequency point, simultaneously initial power is inserted signal source as the current power value, repeating step B05 to B06, so circulation, test and read the range value of the transport property of spectrum analyzer under current Frequency point successively, reach the termination frequency until frequency, preserve whole test datas, i.e. frequency, power this moment, withdraw from the frequency circulation, simultaneously [RF OFF] in the signal source is set to [RF ON]; Finish test to the signal source output power, i.e. the step of large-signal power compression characteristic calibration, preserve whole test datas this moment, as the output power of signal source, i.e. the power input of microwave/millimeter wave vector modulator;

The characteristic test of described large-signal power compression may further comprise the steps:

B1 according to large-signal power compression characteristic calibration steps B01 to B07, finishes the calibration of signal source output power, guarantees that the align mode of calibrating the back signal source does not change, and calibrates signal source dual-port transport property otherwise need finish again;

B2 is set up large-signal power compression characteristic test system, guarantees that simultaneously prevention at radio-frequency port, DC port, main control computer USB port, GPIB-USB control card, gpib bus, power port, the grounding ports of each T ﹠ M equipment all connects normally;

B3 distinguishes initializing signal source, spectrum analyzer and program control D.C. regulated power supply, empties the SCPI register of signal source, spectrum analyzer and program control D.C. regulated power supply respectively;

B4, initial frequency, termination frequency, step frequency, initial power, termination power, stepping power from the main control computer input signal source, the output channel of selecting program control D.C. regulated power supply simultaneously is respectively as microwave/millimeter wave vector modulator VI and VQ direct current biasing source, starting potential, final voltage, the stepped voltage of input VI and VQ, the RBW of input spectrum analyser, VBW, SPAN in addition;

B5, initial frequency and initial power are inserted signal source as current frequency and power respectively, simultaneously I road and Q road starting potential VI and VQ are inserted the corresponding output channel of program control D.C. regulated power supply respectively as current magnitude of voltage, subsequently [Output Power OFF] in the program control D.C. regulated power supply is set to [Output Power ON], and [the RF OFF] in the signal source is set to [RF ON];

B6 tests and reads the range value of the transport property of spectrum analyzer under current Frequency point;

B7, test voltage value when the magnitude of voltage VQ on current Q road is added the stepped voltage value as next Q drive test examination, test and read the range value of the transport property of spectrum analyzer under current Frequency point subsequently, so circulation, until the final voltage value that reaches the Q road, withdraw from the circulation of Q road ground voltage value VQ this moment;

B8, test voltage value when the magnitude of voltage VI on current I road is added stepped voltage as next I drive test examination, and the starting potential of Q road magnitude of voltage is inserted the corresponding output channel of programmable power supply as current magnitude of voltage, test and read the range value of the transport property of spectrum analyzer under current Frequency point, so circulation, until the final voltage value that reaches the I road, withdraw from the circulation of I road magnitude of voltage VI this moment.

B9, current power is added that stepping power is as next performance number, insert signal source, test and read the range value of the transport property of spectrum analyzer under current Frequency point and performance number, repeat step B7 to B8, so circulate, test and read the range value of the transport property of spectrum analyzer under current Frequency point successively, reach termination power until performance number, withdraw from power cycle this moment;

B10, current frequency is added that step frequency inserts in the signal source as next Frequency point, simultaneously I road and Q road starting potential VI and VQ are inserted the corresponding output channel of program control D.C. regulated power supply respectively as current magnitude of voltage, and initial power is inserted signal source as the current power value, repeating step B7 to B8, so circulation, test and read the range value of the transport property of spectrum analyzer under current Frequency point successively, so circulation, reach the termination frequency until frequency, preserve whole test datas this moment, it is frequency, power input, VI, VQ, output power, withdraw from the frequency circulation, simultaneously [Output Power ON] in the program control D.C. regulated power supply is set to [Output Power OFF], and [the RF OFF] in the signal source is set to [RF ON];

B11, call Matlab software, import whole test datas, it is frequency, the power input of microwave/millimeter wave vector modulator, VI, VQ, the output power of microwave/millimeter wave vector modulator, be plotted in fixed frequency respectively, the power compression curve map of the output power of the power input-microwave/millimeter wave vector modulator of the microwave/millimeter wave vector modulator under I road magnitude of voltage VI and the Q road magnitude of voltage VQ, be the power compression curve map of microwave/millimeter wave vector modulator under the different input power condition, and in fixed frequency and fixedly insert damage curve figure under the VI-VQ-large-signal condition under the power input, respectively with the small-signal condition under the insertion loss make comparisons, the final power compression characteristic of determining the microwave/millimeter wave vector modulator, i.e. the power compression curve map of microwave/millimeter wave vector modulator under the different input power condition.

13. the method for testing of the Auto-Test System of microwave/millimeter wave vector modulator transport property according to claim 10 is characterized in that, before large-signal phase place compression property test beginning, at first carries out the calibration of large-signal phase place compression property; Described large-signal phase place compression property calibration steps comprises: the 31) output power of power amplifier calibration; 32) output power of power amplifier test; 33) the transmission phase alignment of power amplifier;

The output power calibration of described power amplifier may further comprise the steps:

C11, the output power calibration system of establishment power amplifier guarantees that simultaneously prevention at radio-frequency port, DC port, main control computer USB port, GPIB-USB control card, gpib bus, power port, the grounding ports of each T ﹠ M equipment all connects normally;

C12, difference initialization vector network analyzer and power meter, and the SCPI register that empties vector network analyzer and power meter respectively;

C13, stop power, stepping power, average time from main control computer input initial frequency, termination frequency, step frequency, intermediate-frequency bandwidth, initial power, port, simultaneously the output channel of power input meter, the correction card of the correspondence of power input sensor in power meter, the average time of power input meter;

C14 finishes the calibration of power sensor and power meter, i.e. [Zero] and [Cal];

C15 inserts vector network analyzer with initial power as current power;

C16 finishes the calibration of the single port output power of vector network analyzer under the current power condition, preserves test data, the i.e. power input of power amplifier (dBm);

C17 adds that with current power stepping power inserts vector network analyzer as next performance number, repeats step C16, so circulation reaches termination power until power, preserves calibration data successively, be frequency (GHz), power input (dBm), withdraw from power cycle this moment;

The output power test of described power amplifier may further comprise the steps:

C21, set up the test macro of the output power of power amplifier, prevention at radio-frequency port, DC port, main control computer USB port, GPIB-USB control card, gpib bus, power port, the grounding ports of guaranteeing each T ﹠ M equipment simultaneously all connect normally, and after the step that the output power of guaranteeing power amplifier is calibrated was complete, the state of power meter and power sensor did not change;

C22, difference initialization vector network analyzer, power meter, program control D.C. regulated power supply, and the SCPI register that empties vector network analyzer, power meter, program control D.C. regulated power supply respectively;

C23, input initial frequency, termination frequency, step frequency, intermediate-frequency bandwidth, the initial power of port power input, the termination power of port power input, the stepping power of port power input, average time, and the output channel of selecting program control D.C. regulated power supply is respectively as the VD and the VG direct current biasing source of power amplifier, respectively VD and the VG service voltage during power input amplifier operate as normal;

C24, initial frequency and initial power are inserted vector network analyzer as current frequency and power respectively, and VD and VG are inserted the corresponding output channel of program control D.C. regulated power supply respectively as current magnitude of voltage, subsequently [Output Power OFF] in the program control D.C. regulated power supply is set to [Output Power ON];

C25, test and the demonstration power of readout power meter under current Frequency point, the i.e. output power of power amplifier;

C26, current power is added that stepping power is as next performance number, insert vector network analyzer, test and the demonstration power of readout power meter under current Frequency point and performance number, so circulation, test and the demonstration power of readout power meter under current Frequency point reach termination power until performance number successively, withdraw from power cycle this moment;

C27, current frequency is added that step frequency inserts in the vector network analyzer as next Frequency point, simultaneously initial power is inserted vector network analyzer as the current power value, repeat step C26, so circulation, test successively and the demonstration power of readout power meter under current Frequency point, reach the termination frequency until frequency, preserve whole test datas this moment, be frequency, output power, withdraw from the frequency circulation, simultaneously [Output Power ON] in the program control D.C. regulated power supply is set to [Output Power OFF];

The transmission phase alignment of described power amplifier may further comprise the steps:

C31, the transmission phase alignment system of establishment power amplifier guarantees that simultaneously prevention at radio-frequency port, DC port, main control computer USB port, GPIB-USB control card, gpib bus, power port, the grounding ports of each T ﹠ M equipment all connects normally;

C32, difference initialization vector network analyzer and program control D.C. regulated power supply, and the SCPI register that empties vector network analyzer and program control D.C. regulated power supply respectively;

C33, input initial frequency, termination frequency, step frequency, intermediate-frequency bandwidth, initial power, termination power, stepping power, average time, the output channel of selecting program control D.C. regulated power supply simultaneously is respectively as the VD and the VG direct current biasing source of power amplifier, respectively VD and the VG service voltage during power input amplifier operate as normal;

C34, initial power is inserted vector network analyzer as current power, simultaneously VD and VG are inserted the corresponding output channel of program control D.C. regulated power supply respectively as current magnitude of voltage, subsequently [Output Power OFF] in the program control D.C. regulated power supply is set to [Output Power ON];

C35 finishes the dual-port transport property calibration of vector network analyzer under the current power condition, preserves calibration data, i.e. the transmission phase place of power amplifier;

C36, current power is added that stepping power inserts vector network analyzer as next performance number, repeat step C35, so circulation, preserve calibration data successively, i.e. the transmission phase place of power amplifier reaches the termination power of port power input until the port power input, withdraw from the circulation of port power input this moment, simultaneously [Output Power ON] in the program control D.C. regulated power supply is set to [Output Power OFF].

Described large-signal phase place compression property method of testing may further comprise the steps:

C1, step according to the calibration of large-signal phase place compression property, finish the calibration of vector network analyzer dual-port transport property, guarantee that the align mode of calibrating the back vector network analyzer does not change, and calibrates vector network analyzer dual-port transport property otherwise need finish again;

C2 is set up large-signal phase place compression property test macro, guarantees that simultaneously prevention at radio-frequency port, DC port, main control computer USB port, GPIB-USB control card, gpib bus, power port, the grounding ports of each T ﹠ M equipment all connects normally;

C3, difference initialization vector network analyzer, the first program control D.C. regulated power supply and the second program control D.C. regulated power supply, and the SCPI register that empties vector network analyzer, the first program control D.C. regulated power supply and the second program control D.C. regulated power supply respectively;

C4, from main control computer input initial frequency, stop frequency, step frequency, intermediate-frequency bandwidth, initial power, port stops power, stepping power, average time, and the output channel of selecting the first program control D.C. regulated power supply is respectively as microwave/millimeter wave vector modulator VI and VQ direct current biasing source, the starting potential of input VI and VQ, final voltage, stepped voltage, the output channel of selecting the second program control D.C. regulated power supply simultaneously is respectively as the VD and the VG direct current biasing source of power amplifier, respectively VD and the VG service voltage during power input amplifier operate as normal;

C5, initial frequency and initial power are inserted vector network analyzer as current frequency and power respectively, and I road and Q road starting potential VI and VQ are inserted the corresponding output channel of the second program control D.C. regulated power supply respectively as current magnitude of voltage, simultaneously VD and VG are inserted the corresponding output channel of program control D.C. regulated power supply respectively as current magnitude of voltage, subsequently [Output Power OFF] in the program control D.C. regulated power supply is set to [Output Power ON];

C6 tests and reads the transmission phase place of vector network analyzer under current Frequency point;

C7, the transmission phase place of spectrum analyzer under current Frequency point tested and read to test voltage value when the magnitude of voltage VQ on current Q road is added the stepped voltage value as next Q drive test examination, so circulation subsequently, until the final voltage value that reaches the Q road, withdraw from the circulation of Q road ground voltage value VQ this moment;

C8, test voltage value when the magnitude of voltage VI on current I road is added stepped voltage as next I drive test examination, and the starting potential of Q road magnitude of voltage is inserted the corresponding output channel of programmable power supply as current magnitude of voltage, test is also read the transmission phase place of spectrum analyzer under current Frequency point, so circulation, until the final voltage value that reaches the I road, withdraw from the circulation of I road magnitude of voltage VI this moment;

C9, the current power value is added that stepping power is as next performance number, insert vector network analyzer, test is also read the transmission phase place of vector network analyzer under current Frequency point and performance number, repeat step C6 to C8, so the transmission phase place of vector network analyzer under current Frequency point tested and read in circulation successively, reach termination power until performance number, withdraw from the circulation of port power input this moment;

C10, current frequency is added that step frequency inserts in the vector network analyzer as next Frequency point, simultaneously I road and Q road starting potential VI and VQ are inserted the corresponding output channel of the second program control D.C. regulated power supply respectively as current magnitude of voltage, and initial power is inserted vector network analyzer as the current power value, repeating step C6 to C8, so circulation, test and read the transmission phase place of vector network analyzer under current Frequency point successively, reach the termination frequency until frequency, preserve whole test datas this moment, it is frequency, the power input of power amplifier, VI, VQ, the transmission phase place of microwave/millimeter wave vector modulator, withdraw from the frequency circulation, simultaneously [Output Power ON] in the second program control D.C. regulated power supply and the first program control D.C. regulated power supply is set to [Output Power OFF];

C11, call Matlab software, import whole test datas, be power input, VI, the VQ of frequency, microwave/millimeter wave vector modulator, the transmission phase place of microwave/millimeter wave vector modulator, be plotted in the fixed frequency and the fixing transmission phase curve figure of the VI-VQ-microwave/millimeter wave vector modulator under the power input respectively, respectively with the small-signal condition under the transmission phase place make comparisons, the final phase place compression property of determining the microwave/millimeter wave vector modulator, i.e. the phase place compression curve figure of microwave/millimeter wave vector modulator under the different input power condition.

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