CN104569589B - A kind of Ku wave bands multiple branch circuit power amplifier phase contrast automatic test device and method - Google Patents
A kind of Ku wave bands multiple branch circuit power amplifier phase contrast automatic test device and method Download PDFInfo
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- CN104569589B CN104569589B CN201410818506.3A CN201410818506A CN104569589B CN 104569589 B CN104569589 B CN 104569589B CN 201410818506 A CN201410818506 A CN 201410818506A CN 104569589 B CN104569589 B CN 104569589B
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Abstract
The present invention relates to a kind of Ku wave bands multiple branch circuit power amplifier phase contrast automatic test device and method, including SP3T switch, signal condition unit, data acquisition unit, control unit, frequency synthesizer；The SP3T switch, for switching the power amplifier in tested multiple branch circuit power amplifier；The signal condition unit, for being changed the power data that tested multiple branch circuit power amplifier is exported, obtains meeting the power level that data acquisition unit gathers standard；The power data for collecting for gathering power data, and is sent to control unit by the data acquisition unit；Described control unit, for sending control signal to frequency synthesizer；The frequency synthesizer, carries out the microwave signal that raising frequency obtains Ku wave bands according to control signal respectively for the microwave signal that synthesizes two-way.Measurement efficiency of the present invention is high, and the data precision is high.
Description
Technical field
The present invention relates to a kind of phase contrast automatic test component, more particularly to a kind of Ku wave bands multiple branch circuit power amplifier
Phase contrast automatic test device and method.
Background technology
Phase equalization has extremely important effect to multiple branch circuit power synthesis amplifier, in the power amplifier of multiple branch circuit
Determined by the circuit characteristic of microwave power amplifier, particularly electrovacuum power amplifier, phase offset in its working band
Larger；According to the principle of power vector superposition, as the deviation of phase place can cause combined coefficient to drop significantly in power combiner
Low, cause output to reduce, power consumption increases.At this stage, it is to solve this problem, adopts vector network analyzer, to every more
Tested and recorded one by one by frequency for the power amplifier of one branch road, then is compensated by frequency source so that each branch road work(
Rate amplifier meets phase requirements in power combiner input；Do so, workload are big, and operation inconvenience, measurement efficiency are low, number
Low according to accuracy.
Content of the invention
The technical problem to be solved is to provide that a kind of measure workload for solving traditional method is big, operation not
Just the problem that, measurement efficiency is low, the data precision is low.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of Ku wave bands multiple branch circuit power amplifier phase contrast
Automatic test device, including SP3T switch, signal condition unit, data acquisition unit, control unit and frequency synthesis
Device；
The SP3T switch, its three not moved end three inputs respectively with tested multiple branch circuit power amplifier
Connection, for switching the power amplifier of different branch in tested multiple branch circuit power amplifier；
The signal condition unit, its input are connected with the outfan of the tested multiple branch circuit power amplifier, are used
In the power data that tested multiple branch circuit power amplifier is exported is changed, obtain meeting data acquisition unit collection standard
Power level；
The data acquisition unit, its input are connected with the outfan of signal condition unit, and its outfan is single with control
The signals collecting input of unit is connected, and for gathering power level, and the power level for collecting is sent to control unit；
Described control unit, three in its four outfans, three input phases respectively with the frequency synthesizer
Even, for frequency synthesizer transmission control signal；Another outfan is connected with the input of the SP3T switch, is used
In to SP3T switch transmission changeover control signal；
The frequency synthesizer, two outfan the 4th input respectively with tested multiple branch circuit power amplifier
Connect with the moved end of SP3T switch, for respectively according to control signal by the biography all the way in the microwave signal of two-way Ku wave bands
Pass the moved end of SP3T switch, by another road microwave signal pass to the 4th of tested multiple branch circuit power amplifier defeated
Enter end.
The invention has the beneficial effects as follows：Measure workload is little, easy to operate, measurement efficiency is high, the data precision is high.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, the frequency synthesizer includes constant-temperature crystal oscillator, phase-locked loop circuit, first frequency comprehensive tunnel and the second frequency
Rate comprehensive tunnel；
The constant-temperature crystal oscillator, its outfan respectively with the first frequency comprehensive tunnel, second frequency comprehensive tunnel and lock
The input end of clock of phase loop circuit is connected, for for first frequency comprehensive tunnel, second frequency comprehensive tunnel and phase-locked loop circuit
Reference frequency is provided；
The phase-locked loop circuit, its outfan respectively with the first frequency comprehensive tunnel and second frequency comprehensive tunnel
The local oscillation signal of generation for producing local oscillation signal, and is passed to first frequency comprehensive tunnel and the by mixing input connection
Two frequency synthesis passages；
Reference frequency and local oscillator are believed by the first frequency comprehensive tunnel, the control signal for being sent according to control unit
Number synthesize the microwave signal of first via Ku wave band by direct digital synthesis technique and mixing, frequency multiplication mode；
Reference frequency and local oscillator are believed by the second frequency comprehensive tunnel, the control signal for being sent according to control unit
Number synthesize the microwave signal of another road Ku wave bands by direct digital synthesis technique and mixing, frequency multiplication mode.
Further, the first frequency comprehensive tunnel is identical with the structure of second frequency comprehensive tunnel, and first frequency
The microwave signal phase difference of the Ku wave bands of comprehensive tunnel and the output of second frequency comprehensive tunnel is controllable.
Further, the first frequency comprehensive tunnel includes direct numerical frequency synthesizer, the first doubler, the first filtering
Device, the first amplifier, the second doubler, the second wave filter, the second amplifier, frequency mixer, the 3rd wave filter, the 3rd amplifier,
Frequency tripler, the 4th wave filter and the 4th amplifier；
Two inputs of the direct numerical frequency synthesizer are connected with described control unit and the constant-temperature crystal oscillator respectively
Connect, the direct numerical frequency synthesizer, the first doubler, the first wave filter, the first amplifier, the second doubler, the second filter
Ripple device, the second amplifier are sequentially connected, and second amplifier is connected with the IF input terminal of the frequency mixer, the frequency mixer
Local oscillator input be connected with phase-locked loop circuit, the RF output end of the frequency mixer is connected with the 3rd wave filter, the described 3rd
Amplifier is sequentially connected with frequency tripler, the 4th wave filter and the 4th amplifier.
Further, the tested multiple branch circuit power amplifier include the first power amplifier, the second power amplifier,
Three power amplifiers, the 4th power amplifier and power combiner；
The input of first power amplifier, the second power amplifier and the 3rd power amplifier respectively with hilted broadsword three
Not moved end connection, the input of the 4th power amplifier and the output of the first frequency comprehensive tunnel of three of throw switch
End connection, the output of first power amplifier, the second power amplifier, the 3rd power amplifier and the 4th power amplifier
End is connected with the power combiner respectively.
Further, a kind of Ku wave bands multiple branch circuit power amplifier phase contrast automated testing method, comprises the following steps：
Step 1：Control unit respectively to frequency synthesizer in two direct numerical frequency synthesizers and phase-locked loop circuit
Control instruction is assigned, sets the reference frequency of two direct numerical frequency synthesizer output settings, phase-locked loop circuit output
Local oscillation signal；
Step 2：The output signal of two direct numerical frequency synthesizers is respectively through first frequency comprehensive tunnel and second
Frequency synthesis passage exports the microwave signal of Ku wave bands；
Step 3：Control unit assigns control instruction to SP3T switch makes its moved end be connected to and tested multiple branch circuit
The not moved end that arbitrary measured power amplifier in power amplifier is connected；
Step 4：Control unit controls a direct numerical frequency synthesizer output and fixes initial phase signal, and according to quilt
The power data of measurement of power rate amplifier output controls the phase place that another direct numerical frequency synthesizer adjusts output signal, until
When data acquisition unit collects the power level of maximum, the first direct digital synthesis technique corresponding to the power level is preserved
Phase difference value corresponding to device and the second Direct Digital Frequency Synthesizers output signal；
Step 5：Control unit controls SP3T switch, makes SP3T switch moved end be coupled with two other with list
The power amplifier of the not moved end connection of three throw switch of knife, repeats step 4, gathers and preserves each successively and connect with not moved end
The synthesis power of the power amplifier of the outfan connection of the input of the power amplifier for connecing and first frequency comprehensive tunnel, when
When synthesis power reaches peak power output, the first Direct Digital Frequency Synthesizers and the second Direct Digital Frequency Synthesizers are preserved
Phase difference value corresponding to output signal.
Step 6：Control unit respectively to frequency synthesizer in two direct numerical frequency synthesizers and phase-locked loop circuit
Control signal is sent, sets the frequency of oscillation of two direct numerical frequency synthesizer output settings, phase-locked loop circuit output
Local oscillation signal, and then the target frequency in first frequency comprehensive tunnel and second frequency comprehensive tunnel output Ku wave bands is made, lay equal stress on
Multiple step 1 obtains the phase difference value corresponding when the output of target frequency meets pre-conditioned to 5；
Step 7：Closed with the second Direct Digital frequency according to the first Direct Digital Frequency Synthesizers preserved in each frequency
The phase difference value that grows up to be a useful person corresponding to output signal, calculates measured power amplifier when output meets pre-conditioned, institute
The phase contrast of corresponding each branch power amplifier in.
Further, the step 2 is specially：The output signal of two direct numerical frequency synthesizers is respectively through the first frequency
The first doubler, the first wave filter, the first amplifier, the second doubler in rate comprehensive tunnel and second frequency comprehensive tunnel,
The microwave signal of high band, the local oscillator that then this signal is produced with phase-locked loop circuit is exported after second wave filter and the second amplifier
Signal exports the microwave signal of higher frequency section after frequency mixer carries out up-conversion, eventually passes the 3rd wave filter, the 3rd amplification
Device, frequency tripler, the 4th wave filter and the 4th amplifier produce the microwave signal of the controllable Ku wave bands of phase place.
Further, the step 4 is specially：Described control unit controls the output of the first direct numerical frequency synthesizer and fixes
Initial phase signal, while assign the instruction that the phase of output signal to the second direct numerical frequency synthesizer is changed；
The power data of measured power amplifier output obtains meeting data acquisition list through the conversion of signal condition unit
The power level of first collection standard, power level is converted to by the power level transmission for collecting to control unit, control unit
Save after power data, while sending to the second direct numerical frequency synthesizer to the modification of next phase of output signal
Control instruction, while feedback data is preserved power with last by the feedback data that collection is fed back through data acquisition unit
The size of data is compared, and according to comparative result, adjusts the phase of the second direct numerical frequency synthesizer output next time
Place value.
Further, described according to comparative result, adjust the phase place of the second direct numerical frequency synthesizer output next time
Value is specially：If the last power data for preserving controls the second Direct Digital frequency comprehensive less than the numerical value of feedback data
The phase value of clutch output next time increases in the same direction, and preserves the power data for feeding back；If the last work(for preserving
Rate data are more than the numerical value of feedback data, then reversely increase the second direct numerical frequency synthesizer output phase value next time,
And reduce phase change stepping；When the power data maximum of feedback is finally collected, the first Direct Digital frequency is preserved
Phase difference value corresponding to synthesizer and the second Direct Digital Frequency Synthesizers output signal.
Further, the step 7 is specially：By the first Direct Digital Frequency Synthesizers for preserving and the second Direct Digital frequency
The phase difference value of rate synthesizer output signal is plus first frequency comprehensive tunnel and second frequency comprehensive tunnel institute on corresponding frequency
Intrinsic phase difference value, that is, obtain on corresponding frequency corresponding to the first power amplifier and the 4th power amplifier input
Phase difference value, and preserved with the phase difference value calculating corresponding to the 4th power amplifier input using the first power amplifier
Data, obtain the input of the second power amplifier, the 3rd power amplifier in tested frequency and the 4th power amplifier
The phase difference value of input.
Description of the drawings
Fig. 1 is present configuration figure.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, SP3T switch, 2, signal condition unit, 3, data acquisition unit, 4, control unit, 5, tested branched
Road power amplifier, 5-1, the first power amplifier, 5-2, the second power amplifier, 5-3, the 3rd power amplifier, 5-4,
Four power amplifiers, 5-5, power combiner, 6, constant-temperature crystal oscillator, 7, phase-locked loop circuit, 8, first frequency comprehensive tunnel, 8-1, straight
Connect digital frequency synthesizer, 8-2, the first doubler, 8-3, the first wave filter, 8-4, the first amplifier, 8-5, the second doubler,
8-6, the second wave filter, 8-7, the second amplifier, 8-8, frequency mixer, 8-9, the 3rd wave filter, 8-10, the 3rd amplifier, 8-11,
Frequency tripler, 8-12, the 4th wave filter, 8-13, the 4th amplifier, 9, second frequency comprehensive tunnel.
Specific embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
Non- for limiting the scope of the present invention.
Embodiment 1
As shown in figure 1, a kind of Ku wave bands multiple branch circuit power amplifier phase contrast automatic test device, including SP3T
Switch 1, signal condition unit 2, data acquisition unit 3, control unit 4 and frequency synthesizer；
The SP3T switch 1, its three not moved end three inputs respectively with tested multiple branch circuit power amplifier 5
End connection, for switching the power amplifier of different branch in tested multiple branch circuit power amplifier 5；
The signal condition unit 2, its input are connected with the outfan of the tested multiple branch circuit power amplifier, are used
In the power data that tested multiple branch circuit power amplifier 5 is exported is changed, obtain meeting the collection mark of data acquisition unit 3
Accurate power level；
The data acquisition unit 3, its input are connected with the outfan of signal condition unit 2, its outfan and control
The signals collecting input of unit 4 is connected, and for gathering power level, and the power level for collecting is sent to control unit
4；
Described control unit 4, three in its four outfans, three input phases respectively with the frequency synthesizer
Even, for frequency synthesizer transmission control signal；Another outfan is connected with the input of the SP3T switch 1,
For sending changeover control signal to SP3T switch 1；
The frequency synthesizer, two outfan are input into the 4th of tested multiple branch circuit power amplifier 5 respectively
The moved end of end and SP3T switch 1 connects, for respectively according to control signal by the microwave signal of two-way Ku wave bands
Road passes to the moved end of SP3T switch 1, another road microwave signal is passed to tested multiple branch circuit power amplifier
Four inputs.
The frequency synthesizer includes that constant-temperature crystal oscillator 6, phase-locked loop circuit 7, first frequency comprehensive tunnel 8 and second frequency are comprehensive
Close passage 9；
The constant-temperature crystal oscillator 6, its outfan respectively with the first frequency comprehensive tunnel 8, second frequency comprehensive tunnel 9 and
The input end of clock of phase-locked loop circuit 7 is connected, for for first frequency comprehensive tunnel 8, second frequency comprehensive tunnel 9 and phaselocked loop
Circuit 7 provides reference frequency；
The phase-locked loop circuit 7, its outfan respectively with the first frequency comprehensive tunnel 8 and second frequency comprehensive tunnel
9 mixing input connection, for producing local oscillation signal, and by the local oscillation signal of generation pass to first frequency comprehensive tunnel and
Second frequency comprehensive tunnel；
The first frequency comprehensive tunnel 8, for the control signal that sent according to control unit 4 by reference frequency and local oscillator
Signal synthesizes the microwave signal of first via Ku wave band by direct digital synthesis technique and mixing, frequency multiplication mode；
The second frequency comprehensive tunnel 9, for the control signal that sent according to control unit 4 by reference frequency and local oscillator
Signal synthesizes the microwave signal of another road Ku wave bands by direct digital synthesis technique and mixing, frequency multiplication mode.
The first frequency comprehensive tunnel 8 is identical with the structure of second frequency comprehensive tunnel 9, and first frequency is comprehensively logical
The microwave signal phase difference of the Ku wave bands of road 8 and the output of second frequency comprehensive tunnel 9 is controllable.
The first frequency comprehensive tunnel 8 includes direct numerical frequency synthesizer 8-1, the first doubler 8-2, the first filtering
Device 8-3, the first amplifier 8-4, the second doubler 8-5, the second wave filter 8-6, the second amplifier 8-7, frequency mixer 8-8, the 3rd
Wave filter 8-9, the 3rd amplifier 8-10, frequency tripler 8-11, the 4th wave filter 8-12 and the 4th amplifier 8-13；
Two inputs of the direct numerical frequency synthesizer 8-1 are brilliant with described control unit 4 and the constant temperature respectively
Shake 6 connections, the direct numerical frequency synthesizer 8-1, the first doubler 8-2, the first wave filter 8-3, the first amplifier 8-4,
Second doubler 8-5, the second wave filter 8-6, the second amplifier 8-7 are sequentially connected, the second amplifier 8-7 and the mixing
The IF input terminal connection of device 8-8, the local oscillator input of the frequency mixer 8-8 are connected with phase-locked loop circuit 7, the frequency mixer 8-
8 RF output end is connected with the 3rd wave filter 8-9, the 3rd the amplifier 8-10 and frequency tripler 8-11, the 4th filtering
Device 8-12 and the 4th amplifier 8-13 are sequentially connected.
The tested multiple branch circuit power amplifier 5 include the first power amplifier 5-1, the second power amplifier 5-2,
Three power amplifier 5-3, the 4th power amplifier 5-4 and power combiner 5-5；
The first power amplifier 5-1, the input point of the second power amplifier 5-2 and the 3rd power amplifier 5-3
Not with three of SP3T switch 1 not moved end be connected, the input and the first frequency of the 4th power amplifier 5-4
The outfan connection of comprehensive tunnel 8, the first power amplifier 5-1, the second power amplifier 5-2, the 3rd power amplifier
The outfan of 5-3 and the 4th power amplifier 5-4 is connected with the power combiner 5-5 respectively.
A kind of Ku wave bands multiple branch circuit power amplifier phase contrast automated testing method, comprises the following steps：
Step 1：Control unit 4 respectively to frequency synthesizer in two direct numerical frequency synthesizers and phase-locked loop circuit
7 assign control instruction, set the reference frequency of two direct numerical frequency synthesizer output settings, the output of phase-locked loop circuit 7
Local oscillation signal；
Step 2：The output signal of two direct numerical frequency synthesizers is respectively through first frequency comprehensive tunnel 8 and second
Frequency synthesis passage 9 exports the microwave signal of Ku wave bands；
Step 3：Control unit 4 assigns control instruction to SP3T switch 1, and to be connected to its moved end branched with tested
The not moved end that arbitrary measured power amplifier in road power amplifier 5 is connected；
Step 4：The fixed initial phase signal of one direct numerical frequency synthesizer output of the control of control unit 4, and according to
The power data of measured power amplifier output controls the phase place that another direct numerical frequency synthesizer adjusts output signal, directly
When maximum power level is collected to data acquisition unit 3, preserve the first Direct Digital frequency corresponding to the power level
Phase difference value corresponding to synthesizer and the second Direct Digital Frequency Synthesizers output signal；
Step 5：Control unit 4 control SP3T switch 1, make SP3T switch moved end be coupled with two other with
The power amplifier of the not moved end connection of SP3T switch, repeats step 4, gathers and preserve each successively with not moved end
The synthesis work(of the power amplifier of the outfan connection of the input of the power amplifier of connection and first frequency comprehensive tunnel 8
Rate, when synthesis power reaches peak power output, preserves the first Direct Digital Frequency Synthesizers and the second Direct Digital frequency
Phase difference value corresponding to synthesizer output signal.
Step 6：Control unit 4 is respectively to two direct numerical frequency synthesizers in frequency synthesizer 5 and phaselocked loop electricity
Road 7 sends control signal, sets the frequency of oscillation of two direct numerical frequency synthesizer output settings, the output of phase-locked loop circuit 7
Fixed local oscillation signal, and then make the target frequency in first frequency comprehensive tunnel 8 and the output Ku wave bands of second frequency comprehensive tunnel 9
Point, and repeat step 1 to 5, obtain the phase difference value corresponding when the output of target frequency meets pre-conditioned；
Step 7：Closed with the second Direct Digital frequency according to the first Direct Digital Frequency Synthesizers preserved in each frequency
The phase difference value that grows up to be a useful person corresponding to output signal, calculates measured power amplifier when output meets pre-conditioned, institute
The phase contrast of corresponding each branch power amplifier in.
The step 2 is specially：The output signal of two direct numerical frequency synthesizers is respectively through first frequency synthesis
The first doubler 8-2, the first wave filter 8-3, the first amplifier 8-4 in passage 8 and second frequency comprehensive tunnel 9, second times
The microwave signal of high band is exported after frequency device 8-5, the second wave filter 8-6 and the second amplifier 8-7, then this signal and phaselocked loop
The local oscillation signal that circuit 7 is produced exports the microwave signal of higher frequency section after frequency mixer 8-8 carries out up-conversion, eventually passes the
Three wave filter 8-9, the 3rd amplifier 8-10, frequency tripler 8-11, the 4th wave filter 8-12 and the 4th amplifier 8-13 are produced
The microwave signal of the controllable Ku wave bands of phase place.
The step 4 is specially：Described control unit 4 controls the fixed initial phase of the first direct numerical frequency synthesizer output
Position signal, while assign the instruction that the phase of output signal to the second direct numerical frequency synthesizer is changed；
The power data of measured power amplifier output obtains meeting data acquisition through the conversion of signal condition unit 2
Unit 3 gathers the power level of standard, and power level is turned by the power level transmission for collecting to control unit 4, control unit 4
Save after being changed to power data, while the second direct numerical frequency synthesizer is sent repairing to next phase of output signal
The control instruction for changing, while the feedback data that collection is fed back through data acquisition unit 3, by feedback data and last preservation
The size of power data is compared, and according to comparative result, adjusts the output next time of the second direct numerical frequency synthesizer
Phase value.
Described according to comparative result, the phase value for adjusting the output next time of the second direct numerical frequency synthesizer is concrete
For：If the last power data for preserving is controlled under the second direct numerical frequency synthesizer less than the numerical value of feedback data
The phase value of output once increases in the same direction, and preserves the power data for feeding back；If the last power data for preserving
It is more than the numerical value of feedback data, then reversely increases the second direct numerical frequency synthesizer output phase value next time, and subtracts
Little phase change stepping；When the power data maximum of feedback is finally collected, the first Direct Digital Frequency Synthesizers are preserved
With the phase difference value corresponding to the second Direct Digital Frequency Synthesizers output signal.
The step 7 is specially：By the first Direct Digital Frequency Synthesizers for preserving and the second direct digital synthesis technique
The phase difference value of device output signal is intrinsic plus first frequency comprehensive tunnel 8 on corresponding frequency and 9 institute of second frequency comprehensive tunnel
Phase difference value, that is, obtain on corresponding frequency corresponding to the first power amplifier 5-1 and the 4th power amplifier 5-4 inputs
Phase difference value, and using the phase difference value meter corresponding to the first power amplifier 5-1 and the 4th power amplifier 5-4 inputs
Calculate preserved data, obtain the input of the second power amplifier 5-2, the 3rd power amplifier 5-3 in test frequency and
The phase difference value of the 4th power amplifier 5-4 inputs.
During Ku wave band multiple branch circuit power amplifier phase contrast automatic test component operations, control unit is respectively to DDS A
(the first direct numerical frequency synthesizer), DDS B (the second direct numerical frequency synthesizer), phaselocked loop assign control instruction, make
The frequency that DDS A, DDS B, phaselocked loop output set；The output signal of DDS A and DDS B is through doubler, wave filter, amplification
The microwave signal of high band is exported after device, and the local oscillation signal that then this signal is produced with phaselocked loop carries out up-conversion by frequency mixer
Export the microwave signal of higher frequency section afterwards, eventually pass wave filter, amplifier, doubler, wave filter, amplifier in Ku wave bands
Output microwave signal.Control unit is assigned control instruction and is connected to its moved end and put with tested first power to SP3T switch
The not moved end that big device 5-1 is connected；Hereafter, the fixed initial phase signal of control unit control DDS A outputs, at the same assign right
The instruction of the phase of output signal modification of DDS B, the performance number of measured power amplifier output is through the place of signal condition unit
Reason becomes the signal that can be gathered by data acquisition unit, and data are protected by the data transfer for collecting to control unit, control unit
Store away, while the instruction of next phase of output signal modification is assigned to DDS B, while collection is fed back through data acquisition unit
The signal that returns, and the size of the signal collected with the last time is compared, if the numerical value of last time is gathered more than this
Numerical value then, the phase value of output next time increases in the same direction, if the last time value less than this collection numerical value if next
Secondary output phase value reversely increases, and phase stepping less and less, during final determination power output maximum, tested first work(
The phase difference value of the input of rate amplifier 5-1 inputs and the 4th power amplifier 5-4, and this numerical value is preserved, with identical
Method tests the phase difference value of each frequency in output bandwidth with 10MHz as stepping, and preserves；
In the same manner, control unit control SP3T switch, make SP3T switch moved end be coupled with the second power amplification
Device 5-2, the 3rd power amplifier 5-3 are put by the power that the phase of output signal change of DDS B collects each branch road successively
Big device and the 4th power amplifier 5-4 synthesis power phase difference value corresponding when peak power output is reached.The number of measure
According to the phase compensation value for being used as each branch power amplifier drive source.
Operating frequency of the present invention be 15.6～17.7GHz, frequency step 10MHz, 10 ° of Phase Difference Measuring Precision, four branch roads
Measurement time of measuring is less than 10mins, input supply voltage DC 15V；Initial phase difference test suite compact conformation, overall dimensions
For 300 × 150 × 40 (length × width × height, units：mm).
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvements that is made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of Ku wave bands multiple branch circuit power amplifier phase contrast automatic test device, it is characterised in that including SP3T
Switch (1), signal condition unit (2), data acquisition unit (3), control unit (4) and frequency synthesizer；
SP3T switch (1), its three not moved end three inputs respectively with tested multiple branch circuit power amplifier (5)
End connection, for switching the power amplifier of different branch in tested multiple branch circuit power amplifier (5)；
Signal condition unit (2), its input are connected with the outfan of the tested multiple branch circuit power amplifier, are used for
The power data that tested multiple branch circuit power amplifier (5) is exported is changed, obtains meeting data acquisition unit (3) collection
The power level of standard；
Data acquisition unit (3), its input are connected with the outfan of signal condition unit (2), its outfan and control
The signals collecting input of unit (4) is connected, and for gathering power level, and it is single that the power level for collecting is sent to control
First (4)；
Described control unit (4), three in its four ports are connected with three inputs of the frequency synthesizer respectively, are used
In to frequency synthesizer transmission control signal；Another outfan is connected with the input of the SP3T switch (1), is used for
Changeover control signal is sent to SP3T switch (1)；
The frequency synthesizer, two outfan the 4th input respectively with tested multiple branch circuit power amplifier (5)
Connect with the moved end of SP3T switch (1), for respectively according to control signal by the microwave signal of two-way Ku wave bands
Road passes to the moved end of SP3T switch (1), and another road microwave signal is passed to tested multiple branch circuit power amplifier
4th input.
2. Ku wave bands multiple branch circuit power amplifier phase contrast automatic test device according to claim 1, its feature exist
In：The frequency synthesizer includes constant-temperature crystal oscillator (6), phase-locked loop circuit (7), first frequency comprehensive tunnel (8) and second frequency
Comprehensive tunnel (9)；
Constant-temperature crystal oscillator (6), its outfan respectively with first frequency comprehensive tunnel (8), second frequency comprehensive tunnel
(9) it is connected with the input end of clock of phase-locked loop circuit (7), for for first frequency comprehensive tunnel (8), second frequency comprehensive tunnel
(9) and phase-locked loop circuit (7) provide reference frequency；
Phase-locked loop circuit (7), its outfan respectively with first frequency comprehensive tunnel (8) and second frequency comprehensive tunnel
(9) local oscillation signal of generation for producing local oscillation signal, and is passed to first frequency comprehensive tunnel by mixing input connection
With second frequency comprehensive tunnel；
First frequency comprehensive tunnel (8), for the control signal that sent according to control unit (4) by reference frequency and local oscillator
Signal synthesizes the microwave signal of first via Ku wave band by direct digital synthesis technique and mixing, frequency multiplication mode；
Second frequency comprehensive tunnel (9), for the control signal that sent according to control unit (4) by reference frequency and local oscillator
Signal synthesizes the microwave signal of another road Ku wave bands by direct digital synthesis technique and mixing, frequency multiplication mode.
3. Ku wave bands multiple branch circuit power amplifier phase contrast automatic test device according to claim 2, its feature exist
In：First frequency comprehensive tunnel (8) are identical with the structure of second frequency comprehensive tunnel (9), and first frequency is comprehensively logical
The microwave signal phase difference of the Ku wave bands that road (8) and second frequency comprehensive tunnel (9) are exported is controllable.
4. Ku wave bands multiple branch circuit power amplifier phase contrast automatic test device according to claim 3, its feature exist
In：Described first frequency comprehensive tunnel (8) include direct numerical frequency synthesizer (8-1), the first doubler (8-2), the first filter
Ripple device (8-3), the first amplifier (8-4), the second doubler (8-5), the second wave filter (8-6), the second amplifier (8-7), mixed
Frequency device (8-8), the 3rd wave filter (8-9), the 3rd amplifier (8-10), frequency tripler (8-11), the 4th wave filter (8-12)
With the 4th amplifier (8-13)；
Two inputs of direct numerical frequency synthesizer (8-1) are brilliant with described control unit (4) and the constant temperature respectively
Shake (6) connection, direct numerical frequency synthesizer (8-1), the first doubler (8-2), the first wave filter (8-3), first are put
Big device (8-4), the second doubler (8-5), the second wave filter (8-6), the second amplifier (8-7) are sequentially connected, and described second puts
Big device (8-7) be connected with the IF input terminal of the frequency mixer (8-8), the local oscillator input of frequency mixer (8-8) and locks phase
Loop circuit (7) connects, and the RF output end of frequency mixer (8-8) is connected with the 3rd wave filter (8-9), the 3rd amplifier
(8-10) it is sequentially connected with frequency tripler (8-11), the 4th wave filter (8-12) and the 4th amplifier (8-13).
5. according to the arbitrary described Ku wave band multiple branch circuit power amplifier phase contrast automatic test devices of claim 2 to 4, its
It is characterised by：The tested multiple branch circuit power amplifier (5) includes the first power amplifier (5-1), the second power amplifier
(5-2), the 3rd power amplifier (5-3), the 4th power amplifier (5-4) and power combiner (5-5)；
The input of the first power amplifier (5-1), the second power amplifier (5-2) and the 3rd power amplifier (5-3)
Respectively with three of SP3T switch (1) not moved end be connected, the input of the 4th power amplifier (5-4) and described
The outfan connection of one frequency synthesis passage (8), the first power amplifier (5-1), the second power amplifier (5-2), the
The outfan of three power amplifiers (5-3) and the 4th power amplifier (5-4) is connected with the power combiner (5-5) respectively.
6. a kind of Ku wave bands multiple branch circuit power amplifier phase contrast automated testing method, it is characterised in that comprise the following steps：
Step 1：Control unit (4) respectively to frequency synthesizer in two direct numerical frequency synthesizers and phase-locked loop circuit
(7) control instruction is assigned, makes reference frequency, phase-locked loop circuit (7) output of two direct numerical frequency synthesizer output settings
The local oscillation signal of setting；
Step 2：The output signal of two direct numerical frequency synthesizers is respectively through first frequency comprehensive tunnel (8) and the second frequency
Rate comprehensive tunnel (9) exports the microwave signal of Ku wave bands；
Step 3：Control unit (4) assigns control instruction to SP3T switch (1), and to be connected to its moved end branched with tested
The not moved end that arbitrary measured power amplifier in road power amplifier (5) is connected；
Step 4：Control unit (4) controls a direct numerical frequency synthesizer output and fixes initial phase signal, and according to quilt
The power data of measurement of power rate amplifier output controls the phase place that another direct numerical frequency synthesizer adjusts output signal, until
When data acquisition unit (3) collects the power level of maximum, the first Direct Digital frequency corresponding to the power level is preserved
Phase difference value corresponding to synthesizer and the second Direct Digital Frequency Synthesizers output signal；
Step 5：Control unit (4) control SP3T switch (1), make SP3T switch moved end be coupled with two other with
The power amplifier of the not moved end connection of SP3T switch, repeats step 4, gathers and preserve each successively with not moved end
The synthesis work(of the power amplifier of the outfan connection of the input of the power amplifier of connection and first frequency comprehensive tunnel (8)
Rate, when synthesis power reaches peak power output, preserves the first Direct Digital Frequency Synthesizers and the second Direct Digital frequency
Phase difference value corresponding to synthesizer output signal；
Step 6：Control unit (4) is respectively to two direct numerical frequency synthesizers in frequency synthesizer (5) and phaselocked loop electricity
Road (7) sends control signal, makes the frequency of oscillation of two direct numerical frequency synthesizer output settings, phase-locked loop circuit (7) defeated
Go out the local oscillation signal of setting, and then make in first frequency comprehensive tunnel (8) and second frequency comprehensive tunnel (9) output Ku wave bands
Target frequency, and repeat step 1 to 5, obtain the phase contrast corresponding when the output of target frequency meets pre-conditioned
Value；
Step 7：According to the first Direct Digital Frequency Synthesizers preserved in each frequency and the second Direct Digital Frequency Synthesizers
Phase difference value corresponding to output signal, calculates measured power amplifier when output meets pre-conditioned, corresponding
Each branch power amplifier in phase contrast.
7. Ku wave bands multiple branch circuit power amplifier phase contrast automated testing method according to claim 6, its feature exist
In the step 2 is specially：The output signal of two direct numerical frequency synthesizers is respectively through first frequency comprehensive tunnel
The first doubler (8-2), the first wave filter (8-3), the first amplifier (8-4) (8) and in second frequency comprehensive tunnel (9),
Second doubler (8-5), the second wave filter (8-6) and the second amplifier (8-7) export the microwave signal of high band afterwards, then this
The local oscillation signal that signal is produced with phase-locked loop circuit (7) carries out exporting the micro- of higher frequency section after up-conversion by frequency mixer (8-8)
Ripple signal, eventually passes the 3rd wave filter (8-9), the 3rd amplifier (8-10), frequency tripler (8-11), the 4th wave filter
(8-12) microwave signal of the controllable Ku wave bands of phase place is produced with the 4th amplifier (8-13).
8. Ku wave bands multiple branch circuit power amplifier phase contrast automated testing method according to claim 6, its feature exist
In the step 4 is specially：Described control unit (4) controls the fixed initial phase of the first direct numerical frequency synthesizer output
Signal, while assign the instruction that the phase of output signal to the second direct numerical frequency synthesizer is changed；
The power data of measured power amplifier output obtains meeting data acquisition list through the conversion of signal condition unit (2)
First (3) gather the power level of standard, and the power level transmission for collecting to control unit (4), control unit (4) are electric by power
Flat turn is saved after being changed to power data, while sending the second direct numerical frequency synthesizer to next output signal phase
The control instruction of position modification, while the feedback data that collection is fed back through data acquisition unit (3), by feedback data and upper
The secondary size for preserving power data is compared, and according to comparative result, the second direct numerical frequency synthesizer of adjustment is next time
Output phase value.
9. Ku wave bands multiple branch circuit power amplifier phase contrast automated testing method according to claim 8, its feature exist
In described according to comparative result, the phase value for adjusting the output next time of the second direct numerical frequency synthesizer is specially：If
Numerical value of the last power data for preserving less than feedback data, then control the second direct numerical frequency synthesizer next time defeated
The phase value for going out increases in the same direction, and preserves the power data for feeding back；If the last power data for preserving is more than feedback
The numerical value of data, then reversely increase the second direct numerical frequency synthesizer output phase value next time, and reduce phase place and change
Become stepping；When the power data maximum of feedback is finally collected, the first Direct Digital Frequency Synthesizers are preserved straight with second
Connect the phase difference value corresponding to digital frequency synthesizer output signal.
10. Ku wave bands multiple branch circuit power amplifier phase contrast automated testing method according to claim 6, its feature exist
In the step 7 is specially：The first Direct Digital Frequency Synthesizers for preserving and the second Direct Digital Frequency Synthesizers are exported
The phase difference value of signal is intrinsic plus first frequency comprehensive tunnel (8) on corresponding frequency and second frequency comprehensive tunnel (9)
Phase difference value, that is, obtain the first power amplifier (5-1) on corresponding frequency right with the 4th power amplifier (5-4) input institute
The phase difference value that answers, and using the first power amplifier (5-1) and the phase place corresponding to the 4th power amplifier (5-4) input
The data preserved by mathematic interpolation, obtain the second power amplifier (5-2), the input of the 3rd power amplifier (5-3) in institute
Test frequency and the phase difference value of the 4th power amplifier (5-4) input.
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| CN109030991B (en) * | 2018-06-25 | 2020-09-15 | 胡南 | Method for judging working state of frequency multiplier |
| EP3915194B1 (en) * | 2019-01-22 | 2023-07-19 | Stmicroelectronics Sa | Method and device for phase detection of a signal via a hybrid coupler, using a test signal |
| CN112684322B (en) * | 2020-12-22 | 2022-11-08 | 北京北广科技股份有限公司 | Test platform of power module |
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