CN102207545B - Automatic testing method and system for transmission characteristic of microwave/millimeter wave vector modulator - Google Patents
Automatic testing method and system for transmission characteristic of microwave/millimeter wave vector modulator Download PDFInfo
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Abstract
The invention discloses an automatic testing method and system for a transmission characteristic of a microwave/millimeter wave vector modulator. The system comprises a small signal transmission characteristic testing system and a large signal transmission characteristic testing system; and the large signal transmission characteristic testing system includes a large signal power compression characteristic testing system and a large signal phase compression characteristic testing system. The automatic testing system is allocated flexibly, is suitable for automatically testing the transmission characteristic of various millimeter wave frequency sections, and can universally realize the automatic testing of the transmission characteristic of the microwave/millimeter wave vector modulator under the large signal condition and under the small signal condition; moreover, the invention also overcomes the trouble of lacking pf the large signal phase compression characteristic and the large signal power compression characteristic testing method and the automatic testing system in the domestic microwave/millimeter wave vector modulator at present, and avoids the defects, such as low efficiency, low precision, a plurality of uncertain factors and the like in the manual testing.
Description
Technical field
The invention belongs to the T ﹠ M technical field of solid state electronics, relate to a kind of automatic test approach and system of transmission characteristic of microwave/millimeter wave vector modulator.
Background technology
can realize the combination in any of signal amplitude and phase place due to the microwave/millimeter wave vector modulator, therefore utilize the microwave/millimeter wave vector modulator can realize simultaneously combined modulation to microwave/millimeter wave wave beam amplitude and phase place, can form a kind of novel microwave/millimeter wave active phased array system, it is the function that it can realize long number attenuator chip and long number phase shifter chip in existing microwave/millimeter wave active phased array system simultaneously, the advantage of doing like this is: 1) the microwave/millimeter wave vector modulator can obtain amplitude-phase equalization preferably in broadband, 2) the direct carrier modulation characteristic of microwave/millimeter wave vector modulator can replace frequency converter and the wave filter in traditional receiving branch and transmitting branch.
For long number attenuator chip and long number phase shifter chip, the microwave/millimeter wave vector modulator is conducive to reduce number of chips, reduce chip volume, reduce the quantity of direct current pad in chip, reduce the difficulty that realizes of peripheral drive circuit, avoid simultaneously long number attenuator and the cascade of long number phase shifter to use the mis-behave that causes.
When the microwave/millimeter wave vector modulator is applied to the transmitting branch of T/R assembly in the Active Phased Array Radar system, consider that the microwave/millimeter wave vector modulator is in the input end of final power amplifier, complete the weighting of the phase and magnitude that transmits by the microwave/millimeter wave vector modulator, need to provide enough power inputs at input port when working due to final power amplifier, so to the transport property of microwave/millimeter wave vector modulator under the large-signal condition, i.e. the test of power compression characteristic and phase place compression property just seems particularly important.
When the microwave/millimeter wave vector modulator is applied to the receiving branch of T/R assembly in the Active Phased Array Radar system, consider that the microwave/millimeter wave vector modulator is in the output terminal of low noise amplifier, complete the weighting of the phase and magnitude that receives signal by the microwave/millimeter wave vector modulator, because receiving branch need to provide enough noise figure and receiving gains for subsequent conditioning circuit, so the test of the performance index of the insertion loss under the small-signal condition of microwave/millimeter wave vector modulator is just seemed particularly important.
The automatic means of testing of present domestic millimeter wave relatively lacks, and on the one hand, millimeter wave T ﹠ M instrument is expensive, some also relates to the technology barriers of external setting, acquisition cost is very high concerning the user, purchases the cycle long, and some millimeter wave frequency band lacks ready-made T ﹠ M instrument; On the other hand, millimeter wave is tested normally manual test at present, tests the manual record test result by the guidance panel button.Connect respectively corresponding instrument and equipment under test for each test event, it is inapplicable when this manual test is larger for microwave/millimeter wave vector modulator quantity to be measured, for example for Active Phased Array Radar T/R assembly, if 8 * 8 gusts just mean that 64 cover microwave/millimeter wave vector modulators are arranged, if 64 * 64 gusts just mean that 4096 cover microwave/millimeter wave vector modulators are arranged, if do not realize test automation, the test meeting is quite loaded down with trivial details, waste time and energy and affect measuring accuracy, also can't automatically carry out test data analysis.
Patent CN101394688 (2009 open) technology discloses a kind of temperature variation of moving-coil speaker being measured impedance curve and voice coil loudspeaker voice coil, calculate the power compression characteristic value of characteristic frequency point by the power compression characteristic without the thermal resistance calculation formula, then calculate the correction formula correction factor, obtain at last the power compression family curve under the different input power condition.Patent CN1758064 (2006 open) technology discloses a kind of interchange (AC) of a plurality of semiconductor devices and method and apparatus (CN1758064) of direct current (DC) characteristic measured.Existing Measurement of Semiconductors device also has a kind of measurement mechanism based on optic test means semiconductor material characteristic and method (CN101527273), a kind of method and system (CN1556390) thereof that is used for the semiconductor material characteristic sign based on the optic test means, a kind of equipment (CN101640830) of identifying based on the material behavior of spectroscopy, method of testing of a kind of lightwave transmission characteristics in atmospheric channel (CN101814952A) etc.Although the technology of relevant measurement of transmission characterist aspect has a lot, also do not have towards the automatic measurement technology of the transport property of microwave/millimeter wave vector modulator so far.
Summary of the invention
Technical matters to be solved by this invention is: the Auto-Test System that a kind of transmission characteristic of microwave/millimeter wave vector modulator is provided, this system not only can effectively overcome when measuring towards mass microwave/millimeter wave vector modulator, test by the instrumentation panel button, the manual record test result, efficient is low, test result is uncertain high, and can overcome the difficulty that present domestic microwave/millimeter wave vector modulator lacks in large-signal phase place compression property and large-signal power compression characteristic test means and Auto-Test System.
In addition, the present invention also provides a kind of automatic test approach of transmission characteristic of microwave/millimeter wave vector modulator.
For solving the problems of the technologies described above, the present invention adopts following technical scheme.
A kind of Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator comprises 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.
As a preferred embodiment of the present invention, described small-signal measuring transmission loss system comprises vector network analyzer, program-controlled d. c voltage-stabilized, main control computer, gpib bus, GPIB-USB control card; The GPIB-USB control card is connected with main control computer, vector network analyzer is connected with the GPIB-USB control card by gpib bus, vector network analyzer also is connected with the microwave/millimeter wave vector modulator, program-controlled d. c voltage-stabilized is connected with the GPIB-USB control card by gpib bus, and program-controlled d. c voltage-stabilized also is connected with the microwave/millimeter wave vector modulator.
As another kind of preferred version of the present invention, described large-signal power compression characteristic test system comprises signal source, spectrum analyzer, program-controlled d. c voltage-stabilized, main control computer, GPIB-USB control card, gpib bus; Described GPIB-USB control card is connected with main control computer, described signal source is connected with the GPIB-USB control card by gpib bus, signal source also is connected with the microwave/millimeter wave vector modulator, described spectrum analyzer is connected with the GPIB-USB control card by gpib bus, spectrum analyzer also is connected with the microwave/millimeter wave vector modulator, described program-controlled d. c voltage-stabilized is connected with the GPIB-USB control card by gpib bus, and program-controlled d. c voltage-stabilized also is connected with the microwave/millimeter wave vector modulator.
as another preferred version of the present invention, 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, gpib bus, GPIB-USB control card, vector network analyzer, the first program-controlled d. c voltage-stabilized, the second program-controlled d. c voltage-stabilized, power amplifier, described GPIB-USB control card is connected with main control computer, vector network analyzer is connected with the GPIB-USB control card by gpib bus, vector network analyzer also is connected with the microwave/millimeter wave vector modulator, the second program-controlled d. c voltage-stabilized is connected with the GPIB-USB control card by gpib bus, the second program-controlled d. c voltage-stabilized also is connected with the microwave/millimeter wave vector modulator, the first program-controlled d. c voltage-stabilized is connected with the GPIB-USB control card by gpib bus, the first program-controlled d. c voltage-stabilized also is connected with power amplifier, power amplifier is connected with the microwave/millimeter wave vector modulator with vector network analyzer respectively.
As another preferred version of the present invention, the output power test macro of described power amplifier comprises vector network analyzer, program-controlled d. c voltage-stabilized, power meter, power amplifier, power sensor, gpib bus, main control computer and GPIB-USB control card; Wherein the GPIB-USB control card is connected with main control computer, and vector network analyzer, program-controlled d. c voltage-stabilized and power meter are connected with the GPIB-USB control card by gpib bus respectively; Power amplifier is connected with vector network analyzer, program-controlled d. c voltage-stabilized and power sensor respectively, and power sensor is connected with power meter.
As another preferred version of the present invention, the output power calibration system of power amplifier comprises vector network analyzer, power meter, power sensor, gpib bus, main control computer and GPIB-USB control card; Wherein the GPIB-USB control card is connected with main control computer, and vector network analyzer is connected with the GPIB-USB control card by gpib bus respectively with power meter, and power sensor is connected with power meter with vector network analyzer respectively.
As another preferred version of the present invention, the correcting device of large-signal phase place compression property test macro comprises vector network analyzer, program-controlled d. c voltage-stabilized, power amplifier, gpib bus, main control computer and GPIB-USB control card; Described GPIB-USB control card is connected with main control computer, program-controlled d. c voltage-stabilized is connected with the GPIB-USB control card by gpib bus respectively with vector network analyzer, and power amplifier is connected with program-controlled d. c voltage-stabilized with vector network analyzer respectively.
A kind of method of testing of Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator comprises:
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.
As a preferred embodiment of the present invention, before the test of small-signal transport property begins, at first carry out the calibration of small-signal transport property, complete the calibration of vector network analyzer dual-port transport property, guarantee to calibrate rear vector network analyzer align mode and do not change, otherwise need to again complete, vector network analyzer dual-port transport property is calibrated;
Described small-signal transport property calibration steps comprises the following 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 completes the calibration of vector network analyzer dual-port transport property, preserves calibration data;
The method of testing of described small-signal transport property comprises the following 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-controlled d. c voltage-stabilized, empties respectively the SCPI register of vector network analyzer and program-controlled d. c voltage-stabilized;
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 simultaneously program-controlled d. c voltage-stabilized 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;
A4, initial frequency is inserted vector network analyzer as current frequency, simultaneously I road and Q road starting potential VI and VQ are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized is set to [Output Power ON];
A5 tests and reads 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 range value and the phase value of the transport property of vector network analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 the current voltage value, test and read range value and the phase value of the transport property of vector network analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 vector network analyzer as next Frequency point, and I road and Q road starting potential VI and VQ are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, repeat the testing procedure of steps A 6 to A7, so circulation, until frequency reaches the termination frequency, preserve whole test datas this moment, it is frequency, VI, VQ, insertion loss, the transmission phase place, withdraw from the frequency circulation, simultaneously [Output Power ON] in program-controlled d. c voltage-stabilized is set to [Output Power OFF],
A9 calls Mat1ab software, imports whole test datas, and namely frequency, VI, VQ, insertion loss, transmission phase place, be plotted in respectively VI, VQ, insertion loss curve map and VI, VQ, transmission phase curve figure under fixed frequency.
As another kind of preferred version of the present invention, 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 comprises the following 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 respectively the SCPI register of signal source and spectrum analyzer;
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 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 successively and read the range value of the transport property of spectrum analyzer under current Frequency point, until performance number reaches termination power, withdraw from power cycle this moment;
B07, current frequency is added that step frequency inserts in 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 successively and read the range value of the transport property of spectrum analyzer under current Frequency point, until frequency reaches the termination frequency, preserve whole test datas, i.e. frequency, power this moment, withdraw from the frequency circulation, simultaneously [RF OFF] in signal source is set to [RF ON]; Complete the 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 comprises the following steps:
B1, according to large-signal power compression characteristic calibration steps B01 to B07, the calibration of settling signal source output power guarantees that the align mode of calibrating rear signal source does not change, otherwise need to again complete, signal source dual-port transport property is calibrated;
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, respectively initializing signal source, spectrum analyzer and program-controlled d. c voltage-stabilized empty respectively the SCPI register of signal source, spectrum analyzer and program-controlled d. c voltage-stabilized;
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 simultaneously program-controlled d. c voltage-stabilized 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 respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized is set to [Output Power ON], and [the RF OFF] in 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 subsequently and read the range value of the transport property of spectrum analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 the current voltage value, test and read the range value of the transport property of spectrum analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 successively and read the range value of the transport property of spectrum analyzer under current Frequency point, until performance number reaches termination power, withdraw from power cycle this moment;
B10, current frequency is added that step frequency inserts in signal source as next Frequency point, simultaneously I road and Q road starting potential VI and VQ are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, and initial power is inserted signal source as the current power value, repeating step B7 to B8, so circulation, test successively and read the range value of the transport property of spectrum analyzer under current Frequency point, so circulation, until frequency reaches the termination 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 program-controlled d. c voltage-stabilized is set to [Output Power OFF], and [the RF OFF] in signal source is set to [RFON],
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 respectively fixed frequency, the power compression curve map of the output power of the power input of the microwave/millimeter wave vector modulator under I road magnitude of voltage VI and Q road magnitude of voltage VQ-microwave/millimeter wave vector modulator, be the power compression curve map of microwave/millimeter wave vector modulator under the different input power condition, and at fixed frequency and fixing insertion loss curve map under the VI-VQ-large-signal condition under power input, respectively with the small-signal condition under insertion loss make comparisons, the final power compression characteristic of determining the microwave/millimeter wave vector modulator, be the power compression curve map of microwave/millimeter wave vector modulator under the different input power condition.
As another preferred version of the present invention, before large-signal phase place compression property test beginning, at first carry 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 comprises the following 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 respectively vector network analyzer and power meter;
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 completes 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 completes 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, until power reaches termination power, preserve calibration data successively, be frequency (GHz), power input (dBm), withdraw from power cycle this moment;
The output power test of described power amplifier comprises the following 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 simultaneously each T ﹠ M equipment 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-controlled d. c voltage-stabilized, and the SCPI register that empties respectively vector network analyzer, power meter, program-controlled d. c voltage-stabilized;
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-controlled d. c voltage-stabilized is respectively as the VD and VG direct current biasing source of power amplifier, VD and VG service voltage when input power amplifier works respectively;
C24, initial frequency and initial power are inserted vector network analyzer as current frequency and power respectively, and VD and VG are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized 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, until performance number reaches termination power, withdraw from power cycle this moment successively;
C27, current frequency is added that step frequency inserts in 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, until frequency reaches the termination frequency, preserve whole test datas this moment, be frequency, output power, withdraw from the frequency circulation, simultaneously [Output Power ON] in program-controlled d. c voltage-stabilized is set to [Output Power OFF];
The transmission phase alignment of described power amplifier comprises the following 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-controlled d. c voltage-stabilized, and the SCPI register that empties respectively vector network analyzer and program-controlled d. c voltage-stabilized;
C33, input initial frequency, termination frequency, step frequency, intermediate-frequency bandwidth, initial power, termination power, stepping power, average time, the output channel of selecting simultaneously program-controlled d. c voltage-stabilized is respectively as the VD of power amplifier and VG direct current biasing source, respectively VD and the VG service voltage during the input power amplifier normal operation;
C34, initial power is inserted vector network analyzer as current power, simultaneously VD and VG are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized is set to [Output Power ON];
C35 completes 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 successively calibration data, i.e. the transmission phase place of power amplifier is until the port power input reaches the termination power of port power input, withdraw from the circulation of port power input this moment, simultaneously [Output Power ON] in program-controlled d. c voltage-stabilized is set to [Output Power OFF].
Described large-signal phase place compression property method of testing comprises the following steps:
C1, step according to the calibration of large-signal phase place compression property, complete the calibration of vector network analyzer dual-port transport property, guarantee that the align mode of calibrating rear vector network analyzer does not change, otherwise need to again complete, vector network analyzer dual-port transport property is calibrated;
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-controlled d. c voltage-stabilized and the second program-controlled d. c voltage-stabilized, and the SCPI register that empties respectively vector network analyzer, the first program-controlled d. c voltage-stabilized and the second program-controlled d. c voltage-stabilized;
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-controlled d. c voltage-stabilized 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 simultaneously the second program-controlled d. c voltage-stabilized is respectively as the VD of power amplifier and VG direct current biasing source, VD and VG service voltage when input power amplifier works respectively,
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 respectively the corresponding output channel of the second program-controlled d. c voltage-stabilized as the current voltage value, simultaneously VD and VG are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized 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 reach the final voltage value on 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 the current voltage value, test and read the transmission phase place of spectrum analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 and read the transmission phase place of vector network analyzer under current Frequency point and performance number, repeat step C6 to C8, so circulation, test and read the transmission phase place of vector network analyzer under current Frequency point successively, until performance number reaches termination power, withdraw from the circulation of port power input this moment;
C10, current frequency is added that step frequency inserts in vector network analyzer as next Frequency point, simultaneously I road and Q road starting potential VI and VQ are inserted respectively the corresponding output channel of the second program-controlled d. c voltage-stabilized as the current voltage value, and initial power is inserted vector network analyzer as the current power value, repeating step C6 to C8, so circulation, test successively and read the transmission phase place of vector network analyzer under current Frequency point, until frequency reaches the termination 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-controlled d. c voltage-stabilized and the first program-controlled d. c voltage-stabilized 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 respectively fixed frequency and the fixing transmission phase curve figure of the VI-VQ-microwave/millimeter wave vector modulator under power input, 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.
Beneficial effect of the present invention is: flexible configuration of the present invention, be not only applicable to the automatic test of various millimeter wave frequency band transport propertys, and under can round Realization microwave/millimeter wave vector modulator large-signal condition with the small-signal condition under transport property automatically test; In addition, the shortcomings such as the present invention has also overcome the difficulty that present domestic microwave/millimeter wave vector modulator lacks in large-signal phase place compression property and large-signal power compression characteristic test means and Auto-Test System, and poor efficiency, the degree of accuracy when having avoided simultaneously manual test is low, uncertain factor is many.
Description of drawings
Fig. 1 is the structural representation of the correcting device of small-signal measuring transmission loss of the present invention system;
Fig. 2 is the structural representation of small-signal measuring transmission loss of the present invention system;
Fig. 3 is the structural representation of the correcting device of large-signal power compression characteristic test system of the present invention;
Fig. 4 is the structural representation of large-signal power compression characteristic test system of the present invention;
Fig. 5 is the structural representation of the output power calibration system of power amplifier of the present invention;
Fig. 6 is the structural representation of the output power test macro of power amplifier of the present invention;
Fig. 7 is the structural representation of the correcting device of large-signal phase place compression property test macro of the present invention;
Fig. 8 is the structural representation of the testing apparatus of large-signal phase place compression property test macro of the present invention;
Fig. 9 is the process flow diagram of small-signal measuring transmission loss method of the present invention;
Figure 10 is the process flow diagram of the calibration steps of small-signal measuring transmission loss of the present invention system;
Figure 11 is the schematic flow sheet of large-signal power compression characteristic test method of the present invention;
Figure 12 is the process flow diagram of the calibration steps of large-signal power compression characteristic test system of the present invention;
Figure 13 is the schematic flow sheet of large-signal phase place compression property method of testing of the present invention;
Figure 14 is the schematic flow sheet of the calibration steps of large-signal phase place compression property test macro of the present invention;
Figure 15 is the schematic flow sheet of the output power method of testing of power amplifier of the present invention;
Figure 16 is the schematic flow sheet of the output power calibration steps of power amplifier of the present invention.
The primary clustering symbol description:
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 d. c voltage-stabilized;
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 d. c voltage-stabilized; 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 d. c voltage-stabilized;
6e, power amplifier; 6f, vector network analyzer;
6g, power sensor; 7a, main control computer;
7b, GPIB-USB control card; 7c, program-controlled d. c voltage-stabilized;
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 d. c voltage-stabilized; 8f, the second program-controlled d. c voltage-stabilized.
Embodiment
The object of the invention is to: 1) overcome when measuring towards mass microwave/millimeter wave vector modulator, test by the instrumentation panel button, manual record test result, the defective such as causing testing uncertain factor increases, and efficient is quite low simultaneously; 2) solve the difficulty that present domestic microwave/millimeter wave vector modulator lacks in large-signal phase place compression property and large-signal power compression characteristic test means and Auto-Test System.
The Auto-Test System of a kind of transmission characteristic of microwave/millimeter wave vector modulator proposed by the invention comprises: small-signal measuring transmission loss system, and large-signal measuring transmission loss system; Large-signal measuring transmission loss system comprises large-signal power compression characteristic test system and large-signal phase place compression property test macro.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Embodiment one
The present embodiment provides a kind of Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator, comprises small-signal measuring transmission loss system, and large-signal measuring transmission loss system; Wherein large-signal measuring transmission loss system comprises large-signal power compression characteristic testing equipment, large-signal phase place compression property testing apparatus.
[small-signal measuring transmission loss system]
As shown in Figure 1, 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 is connected with main control computer 1a, and vector network analyzer 1c is connected with GPIB-USB control card 1b by gpib bus G.
As shown in Figure 2, described small-signal measuring transmission loss system comprises vector network analyzer 2c, program-controlled d. c voltage-stabilized 2d, main control computer 2a, gpib bus G, GPIB-USB control card 2b; GPIB-USB control card 2b is connected with main control computer 2a, vector network analyzer 2c is connected with GPIB-USB control card 2b by gpib bus G, vector network analyzer 2c also is connected with the microwave/millimeter wave vector modulator, program-controlled d. c voltage-stabilized 2d is connected with GPIB-USB control card 2b by gpib bus G, and program-controlled d. c voltage-stabilized 2d also is connected with the microwave/millimeter wave vector modulator.
Main control computer is processed, stores, analyzes, is transmitted by automatic test, fault diagnosis, data that the execution test program set is completed to be measured, and show in a suitable manner or output test result mainly as human-computer interaction terminal.Main control computer is used for the test data of storage small-signal transport property (range parameter and phase parameter), large-signal transport property (power compression parameter and phase place compression parameters); Be used for arranging the detecting information (frequency information, power information, the setting of testing apparatus correlation parameter etc.) of small-signal transport property and large-signal transport property; Also be used for according to small-signal transport property and large-signal transport property separately described method of testing automatically complete the testing process of relevant parameter; And by the GPIB-USB control card, send the steering order of small-signal transport property and large-signal transport property, make testing tool test and the read test data of total line traffic control small-signal transport property corresponding to GPIB-USB control card and large-signal transport property.
The GPIB-USB control card is connected with main control computer, is mainly used in the gpib bus controller of any main control computer with USB port as global function, plug and play used, and can controls at most 14 GPIB instruments able to programme.
Vector network analyzer is connected with the GPIB-USB control card by gpib bus, is used for receiving frequency information, power information, intermediate-frequency bandwidth information, the average time information that main control computer arranges; Vector network analyzer also is connected with the microwave/millimeter wave vector modulator, in order to complete the test of the transport property of microwave/millimeter wave vector modulator under the small-signal condition, namely complete the test of range value (dB) Yu the phase value (DEG) of transport property.
Program-controlled d. c voltage-stabilized is connected with the GPIB-USB control card by gpib bus, is used for receiving output channel information, Output OFF/ON information, the service voltage information that main control computer arranges; Program-controlled d. c voltage-stabilized also is connected with the microwave/millimeter wave vector modulator, in order to complete the supply of microwave/millimeter wave vector modulator I road magnitude of voltage VI and Q road magnitude of voltage VQ.
Described gpib bus is mainly used in connecting and controlling a plurality of programmable instruments, and namely vector network analyzer and program-controlled d. c voltage-stabilized, set up into Auto-Test System with traditional independence or Partial controll instrument system.
[large-signal power compression characteristic test system]
As shown in Figure 3, 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 is connected with main control computer 3a, described signal source 3c is connected with GPIB-USB control card 3b by gpib bus G, described spectrum analyzer 3d is connected with GPIB-USB control card 3b by gpib bus G, and spectrum analyzer 3d is connected 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 d. c voltage-stabilized 4e, main control computer 4a, GPIB-USB control card 4b, gpib bus G; Described GPIB-USB control card 4b is connected with main control computer 4a, described signal source 4c is connected with GPIB-USB control card 4b by gpib bus G, signal source 4c also is connected with the microwave/millimeter wave vector modulator, described spectrum analyzer 4d is connected with GPIB-USB control card 4b by gpib bus G, spectrum analyzer 4d also is connected with the microwave/millimeter wave vector modulator, described program-controlled d. c voltage-stabilized 4e is connected with GPIB-USB control card 4b by gpib bus G, and program-controlled d. c voltage-stabilized 4e also is connected with the microwave/millimeter wave vector modulator.
Described main control computer is completed to be measured automatic test, fault diagnosis, data processing, storage, is analyzed, transmits by carrying out test program set, and show in a suitable manner or output test result mainly as human-computer interaction terminal.
Described GPIB-USB control card is connected with main control computer, is mainly used in the gpib bus controller of any main control computer with USB port as global function, plug and play to be used, and can controls at most 14 GPIB instruments able to programme.
Described signal source is connected with the GPIB-USB control card by gpib bus, is used for receiving frequency information, power information, the RF OFF/ON information that main control computer arranges; Signal source also is connected with the microwave/millimeter wave vector modulator, in order to complete the test of the transport property of microwave/millimeter wave vector modulator under the large-signal condition, namely completes power compression (dBm) test under the large-signal condition.
Described spectrum analyzer is connected with the GPIB-USB control card by gpib bus, is used for receiving frequency information, SPAN information, RBW information, the VBW information that main control computer arranges; Spectrum analyzer also is connected with the microwave/millimeter wave vector modulator, in order to complete the test to the lower range value of the current output frequency point of signal source.
Described program-controlled d. c voltage-stabilized is connected with the GPIB-USB control card by gpib bus, is used for receiving output channel information, Output OFF/ON information, the service voltage information that main control computer arranges; Program-controlled d. c voltage-stabilized also is connected with the microwave/millimeter wave vector modulator, in order to complete the supply of microwave/millimeter wave vector modulator I road magnitude of voltage VI and Q road magnitude of voltage VQ.
Described gpib bus is mainly used in connecting and controlling a plurality of programmable instruments, and namely signal source, spectrum analyzer, program-controlled d. c voltage-stabilized, set up into Auto-Test System with traditional independence or Partial controll instrument system.
[large-signal phase place compression property test macro]
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.
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 control card 5b is connected with main control computer 5a, and vector network analyzer 5e is connected with GPIB-USB control card 5b by gpib bus G respectively with power meter 5c, and power sensor 5d is connected with power meter 5c with vector network analyzer 5e respectively.
As shown in Figure 6, the output power test macro of described power amplifier comprises vector network analyzer 6f, program-controlled d. c voltage-stabilized 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 is connected with main control computer 6a, and vector network analyzer 6f, program-controlled d. c voltage-stabilized 6d are connected with GPIB-USB control card 6b by gpib bus G respectively with power meter 6c; Power amplifier 6e is connected with power sensor 6g with vector network analyzer 6f, program-controlled d. c voltage-stabilized 6d respectively, and power sensor 6g is connected with power meter 6c.
As shown in Figure 7, the correcting device of described large-signal phase place compression property test macro comprises vector network analyzer 7e, program-controlled d. c voltage-stabilized 7c, power amplifier 7d, gpib bus G, main control computer 7a and GPIB-USB control card 7b; Described GPIB-USB control card 7b is connected with main control computer 7a, program-controlled d. c voltage-stabilized 7c is connected with GPIB-USB control card 7b by gpib bus G respectively with vector network analyzer 7e, and power amplifier 7d is connected with program-controlled d. c voltage-stabilized 7c with vector network analyzer 7e respectively.
as shown in Figure 8, 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-controlled d. c voltage-stabilized 8e, the second program-controlled d. c voltage-stabilized 8f, power amplifier 8c, described GPIB-USB control card 8b is connected with main control computer 8a, vector network analyzer 8d is connected with GPIB-USB control card 8b by gpib bus G, vector network analyzer 8d also is connected with the microwave/millimeter wave vector modulator, the second program-controlled d. c voltage-stabilized 8f is connected with GPIB-USB control card 8b by gpib bus G, the second program-controlled d. c voltage-stabilized 8f also is connected with the microwave/millimeter wave vector modulator, the first program-controlled d. c voltage-stabilized 8e is connected with GPIB-USB control card 8b by gpib bus G, the first program-controlled d. c voltage-stabilized 8e also is connected with power amplifier 8c, power amplifier 8c is connected with the microwave/millimeter wave vector modulator with vector network analyzer 8d respectively.
As shown in Figure 8, described large-signal phase place compression property test macro comprises main control computer, gpib bus, GPIB-USB control card, vector network analyzer, the first program-controlled d. c voltage-stabilized, the second program-controlled d. c voltage-stabilized, power meter, power sensor, power amplifier;
Described main control computer is completed to be measured automatic test, fault diagnosis, data processing, storage, is analyzed, transmits by carrying out test program set, and show in a suitable manner or output test result mainly as human-computer interaction terminal.
Described GPIB-USB control card is connected with main control computer, is used for the gpib bus controller of any main control computer with USB port as global function, plug and play to be used, and can controls at most 14 GPIB instruments able to programme.
Vector network analyzer is connected with the GPIB-USB control card by gpib bus, is used for receiving frequency information, power information, intermediate-frequency bandwidth information, the average time information that main control computer arranges; Vector network analyzer also is connected with the microwave/millimeter wave vector modulator, in order to complete the test of the transport property of microwave/millimeter wave vector modulator under the large-signal condition, namely completes transmission phase place (DEG) test under the large-signal condition.
The second program-controlled d. c voltage-stabilized is connected with the GPIB-USB control card by gpib bus, is used for receiving output channel information, Output OFF/ON information, the service voltage information that main control computer arranges; The second program-controlled d. c voltage-stabilized also is connected with the microwave/millimeter wave vector modulator, in order to complete the supply of microwave/millimeter wave vector modulator I road magnitude of voltage VI and Q road magnitude of voltage VQ.
The first program-controlled d. c voltage-stabilized is connected with the GPIB-USB control card by gpib bus, is used for receiving output channel information, Output OFF/ON information, the service voltage information that main control computer arranges; The first program-controlled d. c voltage-stabilized also is connected with power amplifier, the supply of required dc offset voltage (VD and VG) when in order to complete, power amplifier being worked.
Power amplifier is connected with the microwave/millimeter wave vector modulator with vector network analyzer respectively, be used for producing enough output powers in microwave/millimeter wave vector modulator test frequency range, complete the test of the transport property of microwave/millimeter wave vector modulator under the large-signal condition, namely complete transport property phase place compression verification.
Power meter is connected with the GPIB-USB control card by gpib bus, is used for receiving output channel information, average time information, the correction card information that main control computer arranges; Power meter also is connected with power amplifier by power sensor, the test of output power when in order to complete, power amplifier being worked, the i.e. test of Vector Modulation power input.
Described gpib bus is mainly used in connecting and controlling a plurality of programmable instruments, and namely vector network analyzer, program-controlled d. c voltage-stabilized, set up into Auto-Test System with traditional independence or Partial controll instrument system.
The Auto-Test System flexible configuration of transmission characteristic of microwave/millimeter wave vector modulator of the present invention, be not only applicable to the automatic test of various millimeter wave frequency band transport propertys, and used the gpib bus technology, can round Realization microwave/millimeter wave vector modulator large-signal condition under with the small-signal condition under transport property automatically test.The shortcomings such as the present invention has not only overcome the difficulty that present domestic microwave/millimeter wave vector modulator lacks in large-signal phase place compression property and large-signal power compression characteristic test means and Auto-Test System, and poor efficiency, the degree of accuracy when having avoided simultaneously manual test is low, uncertain factor is many.
Embodiment two
The present embodiment provides a kind of method of testing of Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator, and the method comprises: 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.
1) small-signal measuring transmission loss method
Before the test of small-signal transport property begins, at first carry out the calibration of small-signal transport property, complete the calibration of vector network analyzer dual-port transport property, guarantee to calibrate rear vector network analyzer align mode and do not change, otherwise need to again complete, vector network analyzer dual-port transport property is calibrated.
Described small-signal transport property calibration steps comprises the following steps:
A01, according to establishment small-signal measuring transmission loss system calibration shown in Figure 1 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 completes the calibration of vector network analyzer dual-port transport property, preserves calibration data.
The method of testing of described small-signal transport property comprises the following steps:
A1, according to establishment small-signal measuring transmission loss shown in Figure 2 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;
A2 distinguishes initialization vector network analyzer and program-controlled d. c voltage-stabilized, empties respectively the SCPI register of vector network analyzer and program-controlled d. c voltage-stabilized;
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 simultaneously program-controlled d. c voltage-stabilized 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;
A4, initial frequency is inserted vector network analyzer as current frequency, simultaneously I road and Q road starting potential VI and VQ are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized is set to [Output Power ON];
A5, the range value (dB) of testing and read the transport property of vector network analyzer under current Frequency point and phase value (DEG);
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 (dB) and phase value (DEG) of the transport property of vector network analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 the current voltage value, test and read the range value (dB) and phase value (DEG) of the transport property of vector network analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 vector network analyzer as next Frequency point, and I road and Q road starting potential VI and VQ are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, repeat the testing procedure of steps A 6 to A7, so circulation, until frequency reaches the termination frequency, preserve whole test datas this moment, be frequency (GHz), VI (V), VQ (V), insertion loss (dB), transmission phase place (DEG), withdraw from the frequency circulation, simultaneously [Output Power ON] in program-controlled d. c voltage-stabilized is set to [Output Power OFF],
A9, call Matlab software, import whole test datas, be frequency (GHz), VI (V), VQ (V), insertion loss (dB), transmission phase place (DEG), be plotted in respectively VI (V), VQ (V), insertion loss (dB) curve map and VI (V), VQ (V), transmission phase place (DEG) under fixed frequency) curve map.
2) large-signal power compression characteristic test method
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 comprises the following steps:
B01, according to establishment large-signal power compression characteristic test calibration system shown in Figure 3, 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 respectively the SCPI register of signal source and spectrum analyzer;
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 signal source is set to [RF ON];
B05 tests and reads the range value (dBm) 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 (dBm) of the transport property of spectrum analyzer under current Frequency point and performance number, so circulation, test successively and read the range value (dBm) of the transport property of spectrum analyzer under current Frequency point, until performance number reaches termination power, withdraw from power cycle this moment;
B07, current frequency is added that step frequency inserts in 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 successively and read the range value (dBm) of the transport property of spectrum analyzer under current Frequency point, until frequency reaches the termination frequency, preserve whole test datas this moment, be frequency (GHz), power (dBm), withdraw from the frequency circulation, simultaneously [RF OFF] in signal source is set to [RF ON]; Complete the 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 comprises the following steps:
B1, according to large-signal power compression characteristic calibration steps B01 to B07, the calibration of settling signal source output power guarantees that the align mode of calibrating rear signal source does not change, otherwise need to again complete, signal source dual-port transport property is calibrated;
B2, according to establishment large-signal power compression characteristic test system shown in Figure 4, 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;
B3, respectively initializing signal source, spectrum analyzer and program-controlled d. c voltage-stabilized empty respectively the SCPI register of signal source, spectrum analyzer and program-controlled d. c voltage-stabilized;
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 simultaneously program-controlled d. c voltage-stabilized 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 respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized is set to [Output Power ON], and [the RF OFF] in signal source is set to [RF ON];
B6 tests and reads the range value (dBm) 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 subsequently and read the range value (dBm) of the transport property of spectrum analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 the current voltage value, test and read the range value (dBm) of the transport property of spectrum analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 (dBm) of the transport property of spectrum analyzer under current Frequency point and performance number, repeat step B7 to B8, so circulate, test successively and read the range value (dBm) of the transport property of spectrum analyzer under current Frequency point, until performance number reaches termination power, withdraw from power cycle this moment;
B10, current frequency is added that step frequency inserts in signal source as next Frequency point, simultaneously I road and Q road starting potential VI and VQ are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, and initial power is inserted signal source as the current power value, repeating step B7 to B8, so circulation, test successively and read the range value (dBm) of the transport property of spectrum analyzer under current Frequency point, so circulation, until frequency reaches the termination frequency, preserve whole test datas this moment, be frequency (GHz), power input (dBm), VI (V), VQ (V), output power (dBm), withdraw from the frequency circulation, simultaneously [Output Power ON] in program-controlled d. c voltage-stabilized is set to [Output Power OFF], and [the RF OFF] in signal source is set to [RF ON],
B11, call Matlab software, import whole test datas, be frequency (GHz), the power input of microwave/millimeter wave vector modulator (dBm), VI (V), VQ (V), the output power of microwave/millimeter wave vector modulator (dBm), be plotted in respectively fixed frequency, the power compression curve map of the output power (dBm) of the power input (dBm) of the microwave/millimeter wave vector modulator under I road magnitude of voltage VI (V) and Q road magnitude of voltage VQ (V)-microwave/millimeter wave vector modulator, be the power compression curve map of microwave/millimeter wave vector modulator under the different input power condition, and at fixed frequency and fixing insertion loss curve map (by formula 1) under the VI (V) under power input (power input of microwave/millimeter wave vector modulator)-VQ (V)-large-signal condition, respectively with the small-signal condition under insertion loss make comparisons, the final power compression characteristic of determining the microwave/millimeter wave vector modulator, be the power compression curve map of microwave/millimeter wave vector modulator under the different input power condition.
Insertion loss under the large-signal condition (dB)@xxGHz (xxGHz represents under current test frequency)=
The output power of microwave/millimeter wave vector modulator (dBm)-
The power input of microwave/millimeter wave vector modulator (dBm) (1)
3) large-signal phase place compression property method of testing
Before large-signal phase place compression property test beginning, at first carry 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.
31) calibration of the output power of power amplifier comprises the following steps:
C11, according to the output power calibration system of establishment power amplifier shown in Figure 5, 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;
C12, difference initialization vector network analyzer and power meter, and the SCPI register that empties respectively vector network analyzer and power meter;
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 completes 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 completes 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, until power reaches termination power, preserve calibration data successively, be frequency (GHz), power input (dBm), withdraw from power cycle this moment.
32) test of the output power of power amplifier comprises the following steps:
C21, test macro according to the output power of establishment power amplifier shown in Figure 6, 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 simultaneously each T ﹠ M equipment 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-controlled d. c voltage-stabilized, and the SCPI register that empties respectively vector network analyzer, power meter, program-controlled d. c voltage-stabilized;
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-controlled d. c voltage-stabilized is respectively as the VD and VG direct current biasing source of power amplifier, VD and VG service voltage when input power amplifier works respectively;
C24, initial frequency and initial power are inserted vector network analyzer as current frequency and power respectively, and VD and VG are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized is set to [Output Power ON];
C25, test and the demonstration power (dBm) of readout power meter under current Frequency point, the i.e. output power of power amplifier (dBm);
C26, current power is added that stepping power is as next performance number, insert vector network analyzer, test and the demonstration power (dBm) of readout power meter under current Frequency point and performance number, so circulation, test and the demonstration power (dBm) of readout power meter under current Frequency point, until performance number reaches termination power, withdraw from power cycle this moment successively;
C27, current frequency is added that step frequency inserts in 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 (dBm) of readout power meter under current Frequency point, until frequency reaches the termination frequency, preserve whole test datas this moment, be frequency (GHz), output power (dBm), withdraw from the frequency circulation, simultaneously [Output Power ON] in program-controlled d. c voltage-stabilized is set to [Output Power OFF].
33) the transmission phase alignment of power amplifier comprises the following steps:
C31, according to the transmission phase alignment system of establishment power amplifier shown in Figure 7, 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;
C32, difference initialization vector network analyzer and program-controlled d. c voltage-stabilized, and the SCPI register that empties respectively vector network analyzer and program-controlled d. c voltage-stabilized;
C33, input initial frequency, termination frequency, step frequency, intermediate-frequency bandwidth, initial power, termination power, stepping power, average time, the output channel of selecting simultaneously program-controlled d. c voltage-stabilized is respectively as the VD of power amplifier and VG direct current biasing source, respectively VD and the VG service voltage during the input power amplifier normal operation;
C34, initial power is inserted vector network analyzer as current power, simultaneously VD and VG are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized is set to [Output Power ON];
C35 completes the dual-port transport property calibration of vector network analyzer under the current power condition, preserves calibration data, i.e. the transmission phase place (DEG) 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 successively calibration data, i.e. the transmission phase place (DEG) of power amplifier is until the port power input reaches the termination power of port power input, withdraw from the circulation of port power input this moment, simultaneously [Output Power ON] in program-controlled d. c voltage-stabilized is set to [Output Power OFF].
Described large-signal phase place compression property method of testing comprises the following steps:
C1, step according to the calibration of large-signal phase place compression property, complete the calibration of vector network analyzer dual-port transport property, guarantee that the align mode of calibrating rear vector network analyzer does not change, otherwise need to again complete, vector network analyzer dual-port transport property is calibrated;
C2, according to establishment large-signal phase place compression property test macro shown in Figure 8, 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;
C3, difference initialization vector network analyzer, the first program-controlled d. c voltage-stabilized and the second program-controlled d. c voltage-stabilized, and the SCPI register that empties respectively vector network analyzer, the first program-controlled d. c voltage-stabilized and the second program-controlled d. c voltage-stabilized;
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-controlled d. c voltage-stabilized 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 simultaneously the second program-controlled d. c voltage-stabilized is respectively as the VD of power amplifier and VG direct current biasing source, VD and VG service voltage when input power amplifier works respectively,
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 respectively the corresponding output channel of the second program-controlled d. c voltage-stabilized as the current voltage value, simultaneously VD and VG are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized is set to [Output Power ON];
C6 tests and reads the transmission phase place (DEG) of vector network analyzer under current Frequency point;
C7, 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 subsequently and read the transmission phase place (DEG) of spectrum analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 the current voltage value, test and read the transmission phase place (DEG) of spectrum analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 and read the transmission phase place (DEG) of vector network analyzer under current Frequency point and performance number, repeat step C6 to C8, so circulation, test and read the transmission phase place (DEG) of vector network analyzer under current Frequency point successively, until performance number reaches termination power, withdraw from the circulation of port power input this moment;
C10, current frequency is added that step frequency inserts in vector network analyzer as next Frequency point, simultaneously I road and Q road starting potential VI and VQ are inserted respectively the corresponding output channel of the second program-controlled d. c voltage-stabilized as the current voltage value, and initial power is inserted vector network analyzer as the current power value, repeating step C6 to C8, so circulation, test successively and read the transmission phase place (DEG) of vector network analyzer under current Frequency point, until frequency reaches the termination frequency, preserve whole test datas this moment, be frequency (GHz), the power input of power amplifier (dBm), VI (V), VQ (V), the transmission phase place (DEG) of microwave/millimeter wave vector modulator, withdraw from the frequency circulation, simultaneously [Output Power ON] in the second program-controlled d. c voltage-stabilized and the first program-controlled d. c voltage-stabilized is set to [Output Power OFF],
C11, call Matlab software, import whole test datas, be frequency (GHz), the power input of microwave/millimeter wave vector modulator (dBm), VI (V), VQ (V), the transmission phase place (DEG) of microwave/millimeter wave vector modulator, be plotted in respectively fixed frequency and the fixing power input (power input of microwave/millimeter wave vector modulator, be the output power of power amplifier) under transmission phase place (DEG) curve map of VI (V)-VQ (V)-microwave/millimeter wave vector modulator, 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, be the phase place compression curve figure of microwave/millimeter wave vector modulator under the different input power condition.
Embodiment three
The present embodiment is elaborated to measuring transmission loss method and the Auto-Test System of microwave/millimeter wave vector modulator of the present invention by reference to the accompanying drawings.The Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator of the present invention is comprised of systems such as small-signal measuring transmission loss system, large-signal power compression characteristic test system, large-signal phase place compression property test macros.Each system by testing apparatus, testing tool, automatically test control section and testing software and form.Automatically the test control section is comprised of main control computer, gpib bus, GPIB-USB control card, and the user uses the testing software that moves on main control computer, by the GPIB-USB control card, uses gpib bus operational testing instrument, reads and preserve test data.
The composition frame chart of small-signal measuring transmission loss system comprises main control computer 2a, GPIB-USB control card 2b, gpib bus G, vector network analyzer 2c, program-controlled d. c voltage-stabilized 2d as shown in Figure 2.Test is divided into small-signal measuring transmission loss and two parts of small-signal transport property calibration; In order to test and the insertion loss of preservation microwave/millimeter wave vector modulator under the small-signal condition and transmission phase place index.
Large-signal power compression characteristic test system composition frame chart comprises main control computer 4a, GPIB-USB control card 4b, gpib bus G, signal source 4c, spectrum analyzer 4d, program-controlled d. c voltage-stabilized 4e as shown in Figure 4.Test is divided into the characteristic test of large-signal power compression and two parts of large-signal power compression characteristic calibration; In order to test and insertion loss and the power compression index of preservation microwave/millimeter wave vector modulator under the large-signal condition.
Large-signal phase place compression property test macro composition frame chart comprises main control computer 8a, GPIB-USB control card 8b, gpib bus G, power amplifier 8c, vector network analyzer 8d, the first program-controlled d. c voltage-stabilized 8e, the second program-controlled d. c voltage-stabilized 8f as shown in Figure 8.Test is divided into two parts of the test of large-signal phase place compression property and the calibration of large-signal phase place compression property; In order to test and transmission phase place and the phase place compression index of preservation microwave/millimeter wave vector modulator under the large-signal condition.
The method of testing flow process of the Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator of the present invention mainly is comprised of bottom layer driving software (GPIB-USB control card driving etc.), operating system (windows operating system), graphical programming software HP VEE, each application software (comprising large-signal phase place compression property testing software, large-signal power compression characteristic test software, small-signal measuring transmission loss software) and user interface as shown in Figure 9; Each testing software coordinates with each test macro, and the user can complete by the user interface of each testing software the test of each test macro.The soft ware autonomous programming of each application software for being correlated with for the present invention, remainder is the windows operating system of standard or the standard driver that related standards equipment carries.In the present invention, the test procedure that operates on main control computer passes through the GPIB-USB control card, uses gpib bus to control operation and the read test data of testing tool.Can directly control testing tool by instruction by the user interface of software that operates on main control computer, replace the panel button operation, replace manually reading by gpib bus read test result simultaneously; Each test event has satisfied the test request of transmission characteristic of microwave/millimeter wave vector modulator substantially.
The method of testing of the Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator of the present invention comprises: 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.
Small-signal measuring transmission loss system is in order to test and to record the transport property index of microwave/millimeter wave vector modulator.Fig. 1 is the calibration system block diagram of small-signal measuring transmission loss system, and Figure 10 is the small-signal measuring transmission loss calibration process flow diagram that consists of the Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator of the present invention.Fig. 2 is the block diagram of small-signal measuring transmission loss system, and Fig. 9 is the small-signal measuring transmission loss process flow diagram that consists of the transport property Auto-Test System for the microwave/millimeter wave vector modulator of the present invention.As shown in Figure 2, the calibration system of small-signal measuring transmission loss system comprises vector network analyzer, program-controlled d. c voltage-stabilized, gpib bus, main control computer and GPIB-USB control card.Wherein vector network analyzer, program-controlled d. c voltage-stabilized are testing tool, and gpib bus is the system bus of connecting test instrument, in order to control vector network analyzer and program-controlled d. c voltage-stabilized synchronous scanning, carry out the test of transport property in frequency band.Main control computer by the GBIP bus arrange instrument parameter and read, logging test results.The small-signal measuring transmission loss is divided into two steps: first carry out the calibration of small-signal measuring transmission loss system, then carry out the test of small-signal transport property.
Large-signal power compression characteristic test system is in order to test and record insertion loss and the power compression index of microwave/millimeter wave vector modulator under the large-signal condition.Fig. 3 is the calibration system block diagram of large-signal power compression characteristic test system, and Figure 12 is the large-signal power compression characteristic test system calibration process flow diagram that consists of the transport property Auto-Test System of microwave/millimeter wave vector modulator of the present invention.Fig. 4 is large-signal power compression characteristic test system, and Figure 11 is the large-signal power compression characteristic test system test flow chart that consists of the transport property Auto-Test System of microwave/millimeter wave vector modulator of the present invention.As shown in Figure 4, large-signal power compression characteristic test system comprises signal source, spectrum analyzer, program-controlled d. c voltage-stabilized, gpib bus, main control computer and GPIB-USB control card.Wherein signal source, spectrum analyzer, program-controlled d. c voltage-stabilized are testing tool, gpib bus is the system bus of connecting test instrument, in order to control signal source, spectrum analyzer, program-controlled d. c voltage-stabilized synchronous scanning, carry out the test of transport property in frequency band.Main control computer by the GBIP bus arrange instrument parameter and read, logging test results.The characteristic test of large-signal power compression is divided into two steps: first carry out the calibration of large-signal power compression characteristic test system, then carry out insertion loss under the large-signal condition and the test of power compression characteristic.
Large-signal phase place compression property test macro is in order to test and record insertion phase and the phase place compression index of microwave/millimeter wave vector modulator under the large-signal condition.Fig. 8 is the block diagram of large-signal phase place compression property test macro, and Figure 13 is the large-signal phase place compression property test system and test process flow diagram that consists of the transport property Auto-Test System of microwave/millimeter wave vector modulator of the present invention.Fig. 6 is large-signal phase place compression property test macro calibration system---the block diagram of the output power calibration system of power amplifier, Figure 14 are the output power calibration process flow diagrams that consists of power amplifier.Fig. 7 is large-signal phase place compression property test macro calibration system---the block diagram of the output power test macro of power amplifier, Figure 15 are the output power test flow charts that consists of power amplifier.Fig. 8 is large-signal phase place compression property test macro calibration system---the block diagram of the transmission phase alignment system of power amplifier, Figure 16 are the transmission phase alignment process flow diagrams that consists of power amplifier.The purpose of calibration is to determine respectively the output power of vector network analyzer port in test frequency range; Microwave/millimeter wave vector modulator power input, the i.e. output power of power amplifier; And power amplifier is brought in whole calibration system, complete the calibration of whole system phase transfer characteristic.
The output power calibration system part of large-signal phase place compression property test macro calibration system as shown in Figure 5,---power amplifier comprises vector network analyzer, power meter, power sensor, gpib bus, main control computer and GPIB-USB control card at least.Wherein vector network analyzer, power meter, power sensor are testing tool, and gpib bus is the system bus of connecting test instrument, in order to control vector network analyzer, power meter synchronous scanning, carry out the test of transport property in frequency band.Main control computer by the GBIP bus arrange instrument parameter and read, logging test results.
The output power test macro part of large-signal phase place compression property test macro calibration system as shown in Figure 6,---power amplifier comprises vector network analyzer, power amplifier program-controlled d. c voltage-stabilized, power meter, power amplifier, power sensor, gpib bus, main control computer and GPIB-USB control card at least.Wherein vector network analyzer, power amplifier, program-controlled d. c voltage-stabilized, power meter, power sensor are testing tool, gpib bus is the system bus of connecting test instrument, in order to control vector network analyzer, program-controlled d. c voltage-stabilized, power meter synchronous scanning, carry out the test of transport property in frequency band.Main control computer by the GBIP bus arrange instrument parameter and read, logging test results.
As shown in Figure 7, the correcting device of large-signal phase place compression property test macro comprises vector network analyzer, program-controlled d. c voltage-stabilized, power amplifier, gpib bus, main control computer and GPIB-USB control card.Wherein vector network analyzer, power amplifier, program-controlled d. c voltage-stabilized are testing tool, gpib bus is the system bus of connecting test instrument, in order to control vector network analyzer, program-controlled d. c voltage-stabilized synchronous scanning, carry out the test of transport property in frequency band.Main control computer by the GBIP bus arrange instrument parameter and read, logging test results.
As shown in Figure 8, large-signal phase place compression property test macro part comprises vector network analyzer, the first program-controlled d. c voltage-stabilized, power amplifier, the second program-controlled d. c voltage-stabilized, gpib bus, main control computer and GPIB-USB control card at least.Wherein vector network analyzer, the first program-controlled d. c voltage-stabilized, power amplifier, the second program-controlled d. c voltage-stabilized are testing tool, gpib bus is the system bus of connecting test instrument, in order to control vector network analyzer, the first program-controlled d. c voltage-stabilized, the second program-controlled d. c voltage-stabilized synchronous scanning, carry out the test of transport property in frequency band.Main control computer by the GBIP bus arrange instrument parameter and read, logging test results.
The test of large-signal phase place compression property is divided into two steps: first carry out the calibration of large-signal phase place compression property test macro, at least comprise the output power calibration of power amplifier, the output power test of power amplifier, the transmission phase alignment of power amplifier, carry out again subsequently insertion phase under the large-signal condition and the test of phase place compression property.
the present invention is a kind of Auto-Test System and method of transmission characteristic of microwave/millimeter wave vector modulator, this scheme flexible configuration, not only expand to be applicable to the Auto-Test System of various millimeter wave frequency band transport propertys in the enterprising line frequency of microwave test commonly used and measurement instrument basis, and utilization gpib bus technology, under can round Realization microwave/millimeter wave vector modulator large-signal condition with the small-signal condition under the field of automatic testing of transport property, not only overcome the difficulty that present domestic microwave/millimeter wave vector modulator lacks in large-signal phase place compression property and large-signal power compression characteristic test means and Auto-Test System, poor efficiency when having avoided simultaneously manual test, degree of accuracy is low, the shortcomings such as uncertain factor is many.Its transport property that mainly realizes various microwave/millimeter wave vector modulators is tested automatically, especially realized the high-level efficiency test of microwave/millimeter wave vector modulator transport property (power compression characteristic and phase place compression property) under the large-signal condition, and the high-level efficiency test of the transport property under the small-signal condition (transmission phase place and insertion loss).
Description of the invention and application are illustrative, are not to want with scope restriction of the present invention in the above-described embodiments.Here the distortion of disclosed embodiment and change is possible, and the various parts of the replacement of embodiment and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that in the situation that do not break away from spirit of the present invention or essential characteristic, and the present invention can be with other forms, structure, layout, ratio, and realizes with other elements, material and parts.
Claims (11)
1. the Auto-Test System of a transmission characteristic of microwave/millimeter wave vector modulator 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, 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-controlled d. c voltage-stabilized (8e), the second program-controlled d. c voltage-stabilized (8f), power amplifier (8c), described GPIB-USB control card (8b) is connected with main control computer (8a), vector network analyzer (8d) is connected with GPIB-USB control card (8b) by gpib bus (G), vector network analyzer (8d) also is connected with the microwave/millimeter wave vector modulator, the second program-controlled d. c voltage-stabilized (8f) is connected with GPIB-USB control card (8b) by gpib bus (G), the second program-controlled d. c voltage-stabilized (8f) also is connected with the microwave/millimeter wave vector modulator, the first program-controlled d. c voltage-stabilized (8e) is connected with GPIB-USB control card (8b) by gpib bus (G), the first program-controlled d. c voltage-stabilized (8e) also is connected with power amplifier (8c), power amplifier (8c) is connected with the microwave/millimeter wave vector modulator with vector network analyzer (8d) respectively.
2. the Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator according to claim 1 is characterized in that: described small-signal measuring transmission loss system comprises vector network analyzer (2c), program-controlled d. c voltage-stabilized (2d), main control computer (2a), gpib bus (G), GPIB-USB control card (2b); GPIB-USB control card (2b) is connected with main control computer (2a), vector network analyzer (2c) is connected with GPIB-USB control card (2b) by gpib bus (G), vector network analyzer (2c) also is connected with the microwave/millimeter wave vector modulator, program-controlled d. c voltage-stabilized (2d) is connected with GPIB-USB control card (2b) by gpib bus (G), and program-controlled d. c voltage-stabilized (2d) also is connected with the microwave/millimeter wave vector modulator.
3. the Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator 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) is connected with main control computer (1a), and vector network analyzer (1c) is connected with GPIB-USB control card (1b) by gpib bus (G).
4. the Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator according to claim 1, it is characterized in that: described large-signal power compression characteristic test system comprises signal source (4c), spectrum analyzer (4d), program-controlled d. c voltage-stabilized (4e), main control computer (4a), GPIB-USB control card (4b), gpib bus (G), described GPIB-USB control card (4b) is connected with main control computer (4a), described signal source (4c) is connected with GPIB-USB control card (4b) by gpib bus (G), signal source (4c) also is connected with the microwave/millimeter wave vector modulator, described spectrum analyzer (4d) is connected with GPIB-USB control card (4b) by gpib bus (G), spectrum analyzer (4d) also is connected with the microwave/millimeter wave vector modulator, described program-controlled d. c voltage-stabilized (4e) is connected with GPIB-USB control card (4b) by gpib bus (G), program-controlled d. c voltage-stabilized (4e) also is connected with the microwave/millimeter wave vector modulator.
5. the Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator according to claim 4, it 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) is connected with main control computer (3a), described signal source (3c) is connected with GPIB-USB control card (3b) by gpib bus (G), described spectrum analyzer (3d) is connected with GPIB-USB control card (3b) by gpib bus (G), and spectrum analyzer (3d) is connected with signal source (3c).
6. the Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator according to claim 1, it is characterized in that: the output power test macro of described power amplifier comprises vector network analyzer (6f), program-controlled d. c voltage-stabilized (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) is connected with main control computer (6a), and vector network analyzer (6f), program-controlled d. c voltage-stabilized (6d) and power meter (6c) are connected with GPIB-USB control card (6b) by gpib bus (G) respectively; Power amplifier (6e) is connected with vector network analyzer (6f), program-controlled d. c voltage-stabilized (6d) and power sensor (6g) respectively, and power sensor (6g) is connected with power meter (6c).
7. the Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator according to claim 1, it 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) is connected with main control computer (5a), vector network analyzer (5e) is connected with GPIB-USB control card (5b) by gpib bus (G) respectively with power meter (5c), and power sensor (5d) is connected with power meter (5c) with vector network analyzer (5e) respectively.
8. the Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator according to claim 1, it is characterized in that: the correcting device of described large-signal phase place compression property test macro comprises vector network analyzer (7e), program-controlled d. c voltage-stabilized (7c), power amplifier (7d), gpib bus (G), main control computer (7a) and GPIB-USB control card (7b); Described GPIB-USB control card (7b) is connected with main control computer (7a), program-controlled d. c voltage-stabilized (7c) is connected with GPIB-USB control card (7b) by gpib bus (G) respectively with vector network analyzer (7e), and power amplifier (7d) is connected with program-controlled d. c voltage-stabilized (7c) with vector network analyzer (7e) respectively.
9. the method for testing of the Auto-Test System of the described transmission characteristic of microwave/millimeter wave vector modulator of claim 1 to 8 any one, 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;
Before the test of small-signal transport property begins, at first carry out the calibration of small-signal transport property, complete the calibration of vector network analyzer dual-port transport property, guarantee to calibrate rear vector network analyzer align mode and do not change, otherwise need to again complete, vector network analyzer dual-port transport property is calibrated;
Described small-signal transport property calibration steps comprises the following 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 completes the calibration of vector network analyzer dual-port transport property, preserves calibration data;
The method of testing of described small-signal transport property comprises the following 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-controlled d. c voltage-stabilized, empties respectively the SCPI register of vector network analyzer and program-controlled d. c voltage-stabilized;
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 simultaneously program-controlled d. c voltage-stabilized 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;
A4, initial frequency is inserted vector network analyzer as current frequency, simultaneously I road and Q road starting potential VI and VQ are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized is set to [Output Power ON];
A5 tests and reads 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 range value and the phase value of the transport property of vector network analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 the current voltage value, test and read range value and the phase value of the transport property of vector network analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 vector network analyzer as next Frequency point, and I road and Q road starting potential VI and VQ are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, repeat the testing procedure of steps A 6 to A7, so circulation, until frequency reaches the termination frequency, preserve whole test datas this moment, it is frequency, VI, VQ, insertion loss, the transmission phase place, withdraw from the frequency circulation, simultaneously [Output Power ON] in program-controlled d. c voltage-stabilized is set to [Output Power OFF],
A9 calls Matlab software, imports whole test datas, and namely frequency, VI, VQ, insertion loss, transmission phase place, be plotted in respectively VI, VQ, insertion loss curve map and VI, VQ, transmission phase curve figure under fixed frequency.
10. the method for testing of the Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator according to claim 9, 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 comprises the following 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 respectively the SCPI register of signal source and spectrum analyzer;
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 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 successively and read the range value of the transport property of spectrum analyzer under current Frequency point, until performance number reaches termination power, withdraw from power cycle this moment;
B07, current frequency is added that step frequency inserts in 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 successively and read the range value of the transport property of spectrum analyzer under current Frequency point, until frequency reaches the termination frequency, preserve whole test datas, i.e. frequency, power this moment, withdraw from the frequency circulation, simultaneously [RF OFF] in signal source is set to [RF ON]; Complete the 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 comprises the following steps:
B1, according to large-signal power compression characteristic calibration steps B01 to B07, the calibration of settling signal source output power guarantees that the align mode of calibrating rear signal source does not change, otherwise need to again complete, signal source dual-port transport property is calibrated;
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, respectively initializing signal source, spectrum analyzer and program-controlled d. c voltage-stabilized empty respectively the SCPI register of signal source, spectrum analyzer and program-controlled d. c voltage-stabilized;
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 simultaneously program-controlled d. c voltage-stabilized 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 respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized is set to [Output Power ON], and [the RF OFF] in 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 subsequently and read the range value of the transport property of spectrum analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 the current voltage value, test and read the range value of the transport property of spectrum analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 successively and read the range value of the transport property of spectrum analyzer under current Frequency point, until performance number reaches termination power, withdraw from power cycle this moment;
B10, current frequency is added that step frequency inserts in signal source as next Frequency point, simultaneously I road and Q road starting potential VI and VQ are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, and initial power is inserted signal source as the current power value, repeating step B7 to B8, so circulation, test successively and read the range value of the transport property of spectrum analyzer under current Frequency point, so circulation, until frequency reaches the termination 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 program-controlled d. c voltage-stabilized is set to [Output Power OFF], and [the RF OFF] in 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 respectively fixed frequency, the power compression curve map of the output power of the power input of the microwave/millimeter wave vector modulator under I road magnitude of voltage VI and Q road magnitude of voltage VQ-microwave/millimeter wave vector modulator, be the power compression curve map of microwave/millimeter wave vector modulator under the different input power condition, and at fixed frequency and fixing insertion loss curve map under the VI-VQ-large-signal condition under power input, respectively with the small-signal condition under insertion loss make comparisons, the final power compression characteristic of determining the microwave/millimeter wave vector modulator, be the power compression curve map of microwave/millimeter wave vector modulator under the different input power condition.
11. the method for testing of the Auto-Test System of transmission characteristic of microwave/millimeter wave vector modulator according to claim 9 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 comprises the following 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 respectively vector network analyzer and power meter;
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 completes 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 completes 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, until power reaches termination power, preserve calibration data successively, be frequency (GHz), power input (dBm), withdraw from power cycle this moment;
The output power test of described power amplifier comprises the following 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 simultaneously each T ﹠ M equipment 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-controlled d. c voltage-stabilized, and the SCPI register that empties respectively vector network analyzer, power meter, program-controlled d. c voltage-stabilized;
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-controlled d. c voltage-stabilized is respectively as the VD and VG direct current biasing source of power amplifier, VD and VG service voltage when input power amplifier works respectively;
C24, initial frequency and initial power are inserted vector network analyzer as current frequency and power respectively, and VD and VG are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized 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, until performance number reaches termination power, withdraw from power cycle this moment successively;
C27, current frequency is added that step frequency inserts in 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, until frequency reaches the termination frequency, preserve whole test datas this moment, be frequency, output power, withdraw from the frequency circulation, simultaneously [Output Power ON] in program-controlled d. c voltage-stabilized is set to [Output Power OFF];
The transmission phase alignment of described power amplifier comprises the following 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-controlled d. c voltage-stabilized, and the SCPI register that empties respectively vector network analyzer and program-controlled d. c voltage-stabilized;
C33, input initial frequency, termination frequency, step frequency, intermediate-frequency bandwidth, initial power, termination power, stepping power, average time, the output channel of selecting simultaneously program-controlled d. c voltage-stabilized is respectively as the VD of power amplifier and VG direct current biasing source, respectively VD and the VG service voltage during the input power amplifier normal operation;
C34, initial power is inserted vector network analyzer as current power, simultaneously VD and VG are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized is set to [Output Power ON];
C35 completes 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 successively calibration data, i.e. the transmission phase place of power amplifier is until the port power input reaches the termination power of port power input, withdraw from the circulation of port power input this moment, simultaneously [Output Power ON] in program-controlled d. c voltage-stabilized is set to [Output Power OFF];
Described large-signal phase place compression property method of testing comprises the following steps:
C1, step according to the calibration of large-signal phase place compression property, complete the calibration of vector network analyzer dual-port transport property, guarantee that the align mode of calibrating rear vector network analyzer does not change, otherwise need to again complete, vector network analyzer dual-port transport property is calibrated;
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-controlled d. c voltage-stabilized and the second program-controlled d. c voltage-stabilized, and the SCPI register that empties respectively vector network analyzer, the first program-controlled d. c voltage-stabilized and the second program-controlled d. c voltage-stabilized;
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-controlled d. c voltage-stabilized 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 simultaneously the second program-controlled d. c voltage-stabilized is respectively as the VD of power amplifier and VG direct current biasing source, VD and VG service voltage when input power amplifier works respectively,
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 respectively the corresponding output channel of the second program-controlled d. c voltage-stabilized as the current voltage value, simultaneously VD and VG are inserted respectively the corresponding output channel of program-controlled d. c voltage-stabilized as the current voltage value, subsequently [Output Power OFF] in program-controlled d. c voltage-stabilized 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 reach the final voltage value on 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 the current voltage value, test and read the transmission phase place of spectrum analyzer under current Frequency point, so circulation, until reach the final voltage value on 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 and read the transmission phase place of vector network analyzer under current Frequency point and performance number, repeat step C6 to C8, so circulation, test and read the transmission phase place of vector network analyzer under current Frequency point successively, until performance number reaches termination power, withdraw from the circulation of port power input this moment;
C10, current frequency is added that step frequency inserts in vector network analyzer as next Frequency point, simultaneously I road and Q road starting potential VI and VQ are inserted respectively the corresponding output channel of the second program-controlled d. c voltage-stabilized as the current voltage value, and initial power is inserted vector network analyzer as the current power value, repeating step C6 to C8, so circulation, test successively and read the transmission phase place of vector network analyzer under current Frequency point, until frequency reaches the termination 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-controlled d. c voltage-stabilized and the first program-controlled d. c voltage-stabilized 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 respectively fixed frequency and the fixing transmission phase curve figure of the VI-VQ-microwave/millimeter wave vector modulator under power input, 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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| CN104062620B (en) * | 2014-07-16 | 2017-02-22 | 中国科学院上海微系统与信息技术研究所 | Power calibration test system and power calibration measurement method |
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