CN108055091A - A kind of millimeter wave self calibration virtual instrument and its implementation - Google Patents
A kind of millimeter wave self calibration virtual instrument and its implementation Download PDFInfo
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- CN108055091A CN108055091A CN201711193383.9A CN201711193383A CN108055091A CN 108055091 A CN108055091 A CN 108055091A CN 201711193383 A CN201711193383 A CN 201711193383A CN 108055091 A CN108055091 A CN 108055091A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
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Abstract
The invention discloses a kind of millimeter wave self calibration virtual instrument, including microwave signal source, multiplier unit, detecting signal unit and main control computer；Multiplier unit is equipped with input terminal and output terminal, input terminal connection microwave signal source, output terminal connection detecting signal unit；Main control computer connects microwave signal source and detecting signal unit.The present invention has been built with reference to main control computer suitable for the self-alignment virtual instrument of millimeter wave, can be automatically performed calibration, be improved the efficiency of calibration；And other programmable instruments can be coordinated to be used together when in use, substantially increase versatility and the flexibility of the millimeter wave self calibration virtual instrument of the present invention.It is more accurate on calibrating mode in addition, the method for self-calibrating of millimeter wave self calibration virtual instrument provided by the invention covers the calibration of power and frequency simultaneously, and obtained with this possessing the virtual instrument accurately exported.
Description
Technical field
The invention belongs to instruments and field of instrumentation technology, and in particular to a kind of millimeter wave self calibration virtual instrument and its implementation
Method.
Background technology
At present, have many researchs for microwave signal self-calibration technique.Such as VI Service Network Co., Ltd. land a surname
The patent of invention " radio-frequency front-end receiving-transmitting chain on-line calibration method " (application number CN201210103703.8) at peak et al. describes
A kind of calibration of rf signal reception and emission of radio frequency signals calibration, calibrating mode is related, all employs need not be other
External equipment or the self calibration mode of connection carry out the power of electromagnetic wave signal and frequency calibration.But the patent is not directed to virtually
Instrument is built, barely satisfactory in flexibility and versatility also without the related self calibration software of establishment.
In addition, patent of invention " the automobile electricity based on virtual instrument that Kunshan Qiye Inspection ＆ Calibration Technology Co., Ltd. is superb
Sub- radio frequency identification parameter detecting system " (application number CN201110106606.X) describes a kind of based on virtual instrument detection system
The algorithm of communication is implanted into computer by system, so as to solve the demodulation of the multi-standard of virtual instrument, the research and development verification such as analysis and statistics
With the production line test demand of the manufacturing.The patent occurs by the signal of virtual instrument and analysis multimode simultaneously operating, solution
It has determined and has usually required the path alignment problem that expensive Network Analyzer could be completed, but be mainly used for automotive electronics and penetrate
Frequency identification parameter detects, and is not suitable for the measurement frequency of millimeter wave frequency band or broader bandwidth (35GHz~50GHz).
The quick patent application just waited is heard by Taicang T＆W Electronic Co., Ltd., and " a kind of radio frequency calibrates attenuation calibration system automatically
And calibration method " (application number CN201510209050.5) describe a kind of radio frequency and calibrate attenuation calibration system and calibration side automatically
Method, which realizes the calibration of channel power by PC automation controls, and has carried out data processing method, is calibrated
Value.The technology is not suitable for the measurement frequency of millimeter wave frequency band or broader bandwidth (35GHz~50GHz) equally.Although now
Someone is studying millimere-wave band T ＆ M instrument, but mostly expensive, and it is long to purchase the cycle；It is not suitable for higher frequency
Section.
The content of the invention
The object of the present invention is to provide a kind of millimeter wave self calibration virtual instrument, to build the virtual instrument of millimere-wave band,
It completes the self calibration of virtual instrument and exports high-precision millimeter-wave signal by using by self-alignment virtual instrument.
The present invention provides a kind of millimeter wave self calibration virtual instrument, including microwave signal source, multiplier unit, signal detection
Unit and main control computer；Multiplier unit is equipped with input terminal and output terminal, input terminal connection microwave signal source, output terminal connection
Detecting signal unit；Main control computer connects microwave signal source and detecting signal unit.
Multiplier unit is active frequency multiplier chain, including frequency multiplication link and D.C. regulated power supply；Frequency multiplier chain route multiple frequency multipliers
It is composed.
The quantity of the frequency multiplier is 2.
Microwave signal source and detecting signal unit are connected by coaxial cable with multiplier unit, and by GPIB lines with
Main control computer connects.
The present invention also provides a kind of method for self-calibrating of millimeter wave self calibration virtual instrument, comprise the following steps：Step
S1 builds millimeter wave self calibration virtual instrument described in claim 1, completes the initialization of microwave signal source and signal detection list
The initialization of member sets multiplier unit multiples of the frequency parameter N as multiplier unit on main control computer, and sets currently pre-
The initial value of phase frequency；The expected frequence of the reference signal exported by multiplier unit is set to current expected frequence by step S2,
And power attenuation and frequency calibration value of the measuring basis signal under current expected frequence and different capacity, the benchmark letter
Number expected frequence the 1/N of current expected frequence is set to set by the frequency for the drive signal for exporting microwave signal source
It is fixed；Step S3 is generated when reference signal is current expected frequence, the frequency values of drive signal, the frequency school of reference signal
Quasi- value and the corresponding power attenuation chart of different capacity value simultaneously preserve corresponding data；Step S4 adds current expected frequence
Upper step frequency is as newer expected frequence；Newer expected frequence is set to current expected frequence, in repetition by step S5
Step S2 to step S4 is stated, until newer expected frequence, which reaches, terminates frequency, performs step S6 at this time；Step S6, obtains simultaneously
The input-output parameter list of frequency and power is preserved, and closes microwave signal source.
The initialization of the microwave signal source includes：Microwave signal source is opened, the drive signal that microwave signal source is exported
Set of frequency for minimum frequency, the microwave signal source when power of drive signal is set to driving multiplier unit normal work is most
Small output power, the initial value of the current expected frequence is the minimum frequency × N.
The detecting signal unit is preferably Microwave Spectrum Analyser, and the initialization of detecting signal unit includes：Setting should
Microwave Spectrum Analyser【VBW】Parameter,【RBW】Parameter and【Span】Parameter；The harmonic mixer of Microwave Spectrum Analyser
's【Marker】It is arranged to expected frequence.
The following formula calculating may be employed in the power attenuation：PDamage=[Pout-Pin], PinTo input the driving of multiplier unit
The power of signal, PoutCalibration of power value for the reference signal exported by multiplier unit.
The initial frequency is 35~50GHz with the value range for terminating frequency.
The present invention also provides a kind of application methods of millimeter wave self calibration virtual instrument, comprise the following steps：Step S1,
The input-output parameter list of frequency and power is obtained using method for self-calibrating according to claim 4；Step S2 is disconnected
The connection of multiplier unit and main control computer and detecting signal unit simultaneously removes detecting signal unit, opens control program, completes
The initialization of the initialization and control program of microwave signal source；Step S3 inputs the reference signal of required output multiplier unit
Frequency power level；Step S4 calls the input-output parameter list of frequency and power, passes through the benchmark of required output multiplier unit
The frequency power of signal is worth to the frequency and performance number of drive signal；Step S5 sets the frequency power level of microwave signal source
It is set to the frequency and performance number of the drive signal；Step S7, microwave signal source is controlled to open, the output of multiplier unit output terminal is high
The millimeter-wave signal of precision.
The present invention has been built with reference to main control computer suitable for the self-alignment virtual instrument of millimeter wave, passes through main control computer
Use, calibration can be automatically performed, since the different capacity of each frequency point after frequency multiplication is not linear, so if necessary
The instrument built using this needs manually to carry out the test of multiple points, very big if you need to calibration test amount, therefore this method improves
The efficiency of calibration；And other programmable instruments can be coordinated to be used together when in use, substantially increase the millimeter wave of the present invention
The versatility of self calibration virtual instrument and flexibility, in addition, the self calibration of millimeter wave self calibration virtual instrument provided by the invention
Method covers the calibration of power and frequency simultaneously, lower to instrument requirements, suitable for the calibration to non-linear instrument, is calibrating
In mode more accurately, and with this obtained possessing the virtual instrument accurately exported.
Description of the drawings
Fig. 1 is the structure diagram according to a kind of millimeter wave self calibration virtual instrument of the present invention；
Fig. 2 is the self calibration flow chart of steps of self calibration virtual instrument as shown in Figure 1；
Fig. 3 is the process for using figure of self calibration virtual instrument shown in FIG. 1.
Reference numeral：1st, microwave signal source；2nd, multiplier unit；21st, frequency multiplication link；22nd, D.C. regulated power supply；3rd, master control meter
Calculation machine；5th, detecting signal unit
Specific embodiment
Standard commands for programmable instruments SCPI (Standard Commands for Programmable instrument)
It emerges in nineteen ninety, this set standard is defined available for the grammer for controlling all programmable instruments, imperative structures and data lattice
Formula.
Labview is a kind of development environment, and the significant difference of Labview and other computer languages are：Labview is used
Be that graphical author language G writes program, the program of generation is the form of block diagram.Labview can give full play to computer
Ability, have powerful data-handling capacity, can with the stronger instrument of function of creation, user can according to oneself need define
With manufacture various instruments, available for carrying out data acquisition and programme-control.
The present invention is by the use of the computer as virtual instrument, based on standard commands for programmable instruments SCPI (following article microwaves
Signal source, detecting signal unit etc.) and labview, using general computer hardware and operating system to rely on, realize various instrument
Device function.
It is according to the virtual instrument 10 of the millimere-wave band of one embodiment of the present of invention, including microwave signal as shown in Figure 1
Source 1, multiplier unit 2, main control computer 3 and detecting signal unit 5.The microwave signal source 1 is arranged to output for driving
The drive signal of multiplier unit 2.Multiplier unit 2 is equipped with input terminal and output terminal, which passes through coaxial cable and microwave
Signal source 1 is connected, which is connected by coaxial cable with detecting signal unit 5.Multiplier unit 2 is by drive signal as a result,
Millimere-wave band reference signal is obtained by frequency doubling technology, and is transferred on detecting signal unit 5.The frequency multiplication of the multiplier unit 2
Unit multiple is N, is preferably active frequency multiplier chain, including frequency multiplication link 21 and D.C. regulated power supply 22；Frequency multiplication link 21 is by multiple
Frequency multiplier is composed, and is preferably to be composed of 2 frequency multipliers in the present invention, with specific reference to microwave signal source and required
Frequency determine the quantity of frequency multiplier, can obtain different multiplier unit multiples by using different frequency multipliers.Signal
The preferably Microwave Spectrum Analyser of detection unit 5, model Agilent E4446B, for detecting the actual frequency of signal and reality
Power.Main control computer 3 is connected by GPIB lines with microwave signal source 1 and detecting signal unit 5, so as to by loading thereon
Self-calibration routines and control program control microwave signal source 1 and detecting signal unit 5.
As shown in Fig. 2, the present invention also provides a kind of method for self-calibrating of millimeter wave self calibration virtual instrument, this method profits
With the self-calibration routines loaded on main control computer 3, comprise the following steps：
Step S1, builds millimeter wave self calibration virtual instrument as shown in Figure 1, complete microwave signal source 1 initialization and
The initialization of detecting signal unit 5 sets the initial value of frequency parameter N and current expected frequence on main control computer 3.
The initialization of microwave signal source 1 includes：Main control computer 3 opens microwave signal source 1 by gpib bus, by microwave
The minimum frequency when set of frequency for the drive signal that signal source 1 exports works normally for microwave signal source 1, outputs it power
It is arranged to the minimum output power of the microwave signal source 1 when driving multiplier unit 2 works normally.
The initialization of detecting signal unit 5 includes：Its datum, bandwidth are configured.In the present embodiment, due to
Detecting signal unit 5 preferably Microwave Spectrum Analyser, model Agilent E4446B, main control computer are opened by gpib bus
Microwave Spectrum Analyser is opened, which is set【VBW】Parameter,【RBW】Parameter and【Span】Parameter, wherein
Span parameters are preferably arranged to 100KHz, and the harmonic wave of Microwave Spectrum Analyser are mixed no more than 500MHz and not less than 1KHz
Frequency device【Marker】It is arranged to expected frequence.
Frequency parameter N is set to the multiplier unit multiple of multiplier unit 2 in the self-calibration routines on main control computer 3,
The base that main control computer 3 is exported by frequency × N calculating of the drive signal of microwave signal source 1 by multiplier unit 2
The expected frequence of calibration signal.Also, the initial value of the current expected frequence of reference signal is set as the driving of microwave signal source 1
Minimum frequency × N of signal.
Step S2 controls the expected frequence of the reference signal exported by multiplier unit 2 as current expected frequence, and measures
Power attenuation and frequency calibration value of the reference signal under current expected frequence and under different capacity.Main control computer 3 from
Current expected frequence is read in virtual instrument self-calibration routines and passes through gpib bus and is written into Microwave Spectrum Analyser, and
The reference signal exported by multiplier unit 2 is controlled to switch to current expected frequence.The control of the expected frequence is by will be micro-
The frequency of the drive signal of ripple signal source 1 is set to the 1/N of current expected frequence to realize, N is frequency parameter.Change microwave letter
The power of number 1 drive signal of source, the scanning of detecting signal unit 5 obtain reference signal under current expected frequence and under different capacity
Actual frequency and actual signal amplitude peak value, i.e. frequency and work(of the reference signal under current expected frequence and under different capacity
The calibration value of rate.
Then, main control computer 3 obtains reference signal under current expected frequence and different capacity according to following equation
Under power attenuation PDamage：
PDamage=[Pout-Pin],
Wherein PinTo input the power of the drive signal of multiplier unit 2, PoutFor the reference signal exported by multiplier unit 2
Calibration of power value.
Step S3, main control computer 3 are generated when reference signal is current expected frequence, the frequency values of drive signal,
The corresponding power attenuation chart of frequency calibration value and different capacity value of reference signal simultaneously completes the preservation of corresponding data.
Step S4, main control computer 3 is using current expected frequence plus step frequency as newer expected frequence.
Newer expected frequence is set to current expected frequence by step S5, and repeat the above steps S2 to step S4, until
Newer expected frequence, which reaches, terminates frequency, performs step S6 at this time.Based on existing microwave signal source and frequency multiplier, described
Beginning frequency and the value range for terminating frequency are 35~50GHz.
Step S6 is obtained and is preserved frequency and the input-output parameter list of power, and closes microwave signal source 1.Wherein,
The input-output parameter list of frequency and power for input multiplier unit 2 drive signal frequency and power in comparison with output times
The frequency of the reference signal of frequency unit 2 and the parameter list of calibration of power value.
Virtual instrument 10 realizes virtual instrument self-calibration function as a result,.
As shown in figure 3, the present invention also provides a kind of application method of millimeter wave self calibration virtual instrument, this method utilizes
The control program loaded on main control computer 3, includes the following steps：
Step S1 obtains the input-output of frequency and power using method for self-calibrating as shown in Figure 2 and as described above
Parameter list；
Step S2 disconnects the connection of multiplier unit 2 and main control computer 3 and detecting signal unit 5 and removes signal detection
Unit 5 opens control program, completes the initialization of the initialization and control program of microwave signal source 1；
Step S3 inputs the frequency and performance number of the reference signal of required output multiplier unit 2；
Step S4 calls the input-output parameter list of frequency power, passes through the reference signal of required output multiplier unit 2
Frequency power be worth to the frequency and performance number of drive signal；
The frequency power level of microwave signal source 1 is arranged to the frequency and performance number of the drive signal by step S5.
Step S7, control microwave signal source 1 is opened, and 2 output terminal of multiplier unit exports high-precision millimeter wave.
Main control computer 3 realizes the control of the frequency power level of the reference signal of 2 output terminal of multiplier unit as a result,.It can
It can with verify the virtual instrument in the output terminal of the multiplier unit 2 instrument to be set to detect frequency and the performance number of reference signal
The property used.If the frequency and performance number that read are compared with the calibration value of frequency and power, deviation is less than 1%, then the instrument calibration is complete
Finish, can be used for general measure.
Claims (10)
1. a kind of millimeter wave self calibration virtual instrument, it is characterised in that：Including microwave signal source (1), multiplier unit (2), master control
Computer (3) and detecting signal unit (5)；Multiplier unit (2) is equipped with input terminal and output terminal, input terminal connection microwave signal
Source (1), output terminal connection detecting signal unit (5)；Main control computer (3) connection microwave signal source (1) and detecting signal unit
(5)。
2. millimeter wave self calibration virtual instrument according to claim 1, which is characterized in that multiplier unit (2) is active times
Frequency chain, including the frequency multiplication link (21) being serially connected and D.C. regulated power supply (22), wherein frequency multiplication link (21) is by multiple frequencys multiplication
Device is composed.
3. millimeter wave self calibration virtual instrument according to claim 2, which is characterized in that the quantity of the frequency multiplier is 2
It is a.
4. millimeter wave self calibration virtual instrument according to claim 1, which is characterized in that microwave signal source (1) and signal
Detection unit (5) is connected by coaxial cable with multiplier unit (2), and is connected by GPIB lines with main control computer (3).
5. a kind of method for self-calibrating of millimeter wave self calibration virtual instrument, which is characterized in that comprise the following steps：
Step S1 builds millimeter wave self calibration virtual instrument described in claim 1, completes the initialization of microwave signal source (1)
With the initialization of detecting signal unit (5), frequency multiplication lists of the frequency parameter N as multiplier unit (2) is set on main control computer (3)
First multiple, and set the initial value of current expected frequence；
The expected frequence of the reference signal exported by multiplier unit (2) is set to current expected frequence, and measurement base by step S2
Power attenuation and frequency calibration value of the calibration signal under current expected frequence and different capacity, the expection of the reference signal
Frequency is set to the 1/N of current expected frequence to set by the frequency for the drive signal for exporting microwave signal source；
Step S3 is generated when reference signal is current expected frequence, the frequency values of drive signal, the frequency school of reference signal
Quasi- value and the corresponding power attenuation chart of different capacity value simultaneously preserve corresponding data；
Step S4, using current expected frequence plus step frequency as newer expected frequence；
Newer expected frequence is set to current expected frequence by step S5, and repeat the above steps S2 to step S4, until update
Expected frequence reach and terminate frequency, perform step S6 at this time；
Step S6 is obtained and is preserved frequency and the input-output parameter list of power, and closes microwave signal source 1.
6. the method for self-calibrating of millimeter wave self calibration virtual instrument according to claim 5, which is characterized in that the microwave
The initialization of signal source (1) includes：Microwave signal source (1) is opened, the frequency of the drive signal of microwave signal source (1) output is set
Minimum frequency is set to, the power of drive signal is set to the minimum of the microwave signal source (1) when driving multiplier unit (2) works normally
Output power, the initial value of current expected frequence is the minimum frequency × N.
7. the method for self-calibrating of millimeter wave self calibration virtual instrument according to claim 5, which is characterized in that the signal
Detection unit (5) is preferably Microwave Spectrum Analyser, and the initialization of detecting signal unit (5) includes：The microwave spectrum point is set
Analyzer【VBW】Parameter,【RBW】Parameter and【Span】Parameter；The harmonic mixer of Microwave Spectrum Analyser【Marker】
Value is arranged to expected frequence.
8. the method for self-calibrating of millimeter wave self calibration virtual instrument according to claim 5, which is characterized in that the power
The following formula calculating may be employed in loss：PDamage=[Pout-Pin], wherein
PinTo input the power of the drive signal of multiplier unit 2, PoutPower for the reference signal exported by multiplier unit (2)
Calibration value.
9. the method for self-calibrating of millimeter wave self calibration virtual instrument according to claim 5, which is characterized in that the starting
Frequency is 35~50GHz with the value range for terminating frequency.
10. a kind of application method of millimeter wave self calibration virtual instrument, which is characterized in that comprise the following steps：
Step S1 obtains the input-output parameter list of frequency and power using method for self-calibrating according to claim 4；
Step S2 disconnects the connection of multiplier unit (2) and main control computer (3) and detecting signal unit (5) and removes signal inspection
Unit (5) is surveyed, control program is opened, completes the initialization of the initialization and control program of microwave signal source (1)；
Step S3 inputs the frequency power level of the reference signal of required output multiplier unit (2)；
Step S4 calls the input-output parameter list of frequency and power, passes through the reference signal of required output multiplier unit (2)
Frequency power be worth to the frequency and performance number of drive signal；
The frequency power level of microwave signal source (1) is arranged to the frequency and performance number of the drive signal by step S5；
Step S7, microwave signal source (1) is controlled to open, the output terminal of multiplier unit (2) exports high-precision millimeter-wave signal.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109495117A (en) * | 2018-12-18 | 2019-03-19 | 北京品驰医疗设备有限公司 | Wireless energy transfer transmitting frequency calibration method and device |
| CN111510228A (en) * | 2020-04-13 | 2020-08-07 | 河北东森电子科技有限公司 | Automatic calibration device and method for millimeter wave satellite communication detection assembly |
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