CN104914393B - A kind of device and method calibrated for comb spectrum generator phase spectrum - Google Patents
A kind of device and method calibrated for comb spectrum generator phase spectrum Download PDFInfo
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Abstract
The present invention discloses a kind of device calibrated for comb spectrum generator phase spectrum, including the first and second microwave signal inputs；Orthocoupler, the sinusoidal signal that two-way phase difference is 90 ° is produced based on the first microwave signal；Power splitter, is divided into first via signal and second road signal by the second microwave signal；Driving signal input, drive signal is provided to be calibrated comb spectrum generator；Time domain waveform output end, output is calibrated the time domain waveform of comb spectrum generator generation；Sampling oscilloscope, under the triggering of second road signal, gathers based on the two-way phase difference data during for the calculating that 90 ° of sinusoidal signal is produced needed for base distortion and is calibrated the time domain waveform of comb spectrum generator generation；Phase calibration unit, based on calculate when base distortion needed for data and be calibrated comb spectrum generator time domain waveform, to be calibrated comb spectrum generator carry out phase spectrum calibration.The problem of base distortion influences on calibration result when solving in comb spectrum generator phase calibration process.
Description
Technical field
The present invention relates to phase spectrum collimation technique.The dress calibrated more particularly, to a kind of comb spectrum generator phase spectrum
Put and method.
Background technology
Comb spectrum generator has been widely used in non-linear vector network analyzer phase school as harmonic phase standard
Among the fields such as standard, nonlinear device characteristic present.At present, the calibration of comb spectrum generator phase spectrum is at home still in spy
Rope stage, conventional calibrator (-ter) unit is sampling oscilloscope.Comb spectrum generator calibration Major Difficulties have two：One is sampling
Oscilloscope data acquisition window chooses different time delayses, and corresponding comb spectrum generator phase spectrum is simultaneously differed, this be because
Translated for signal in time domain, be equivalent to phase spectrum on frequency domain and add a linear increment so that same comb spectrum is sent out
Raw device is measured, and obtained phase spectrum is simultaneously differed；When two distortions of base when being sampling oscilloscope can be to comb spectrum generator
The accurate measurement of domain waveform produces influence, and then influences the accurate alignment of phase spectrum.The present invention have studied to solve problem above
A kind of apparatus and method for comb spectrum generator phase spectrum accurate alignment.
The content of the invention
It is an object of the present invention to provide a kind of device of comb spectrum generator phase spectrum calibration, the device solves comb
Shape composes the calibration problem of generator phase spectrum, while solving when in comb spectrum generator phase calibration process base distortion to calibration
As a result the problem of influenceing, and different time delay is chosen to sampling oscilloscope data acquisition window and different measuring systems are used
When, gained comb spectrum generator phase spectrum is handled, and obtains the consistent calibration result contrasted.
To reach above-mentioned purpose, the present invention uses following technical proposals：
A kind of device calibrated for comb spectrum generator phase spectrum, the device includes,
First microwave signal input；
Second microwave signal input；
Orthocoupler, the sinusoidal signal that two-way phase difference is 90 ° is produced based on the first microwave signal；
Power splitter, is divided into first via signal and second road signal by the second microwave signal；
Drive signal output end, drive signal is provided to be calibrated comb spectrum generator；
Time domain waveform input, input is calibrated the time domain waveform that comb spectrum generator is produced based on the drive signal；
Sampling oscilloscope, under the triggering of the second road signal, is gathered based on the sine that the two-way phase difference is 90 °
Data and the time domain waveform that is produced by comb spectrum generator during the calculating that signal is produced needed for base distortion, this when base distortion needed for
Data include the related data such as phase, frequency, signal bandwidth；
Phase calibration unit, data during based on the calculating needed for base distortion and is calibrated comb spectrum generator time domain ripple
Shape, phase spectrum calibration is carried out to being calibrated comb spectrum generator.
It is preferred that, the first microwave signal input and the second microwave signal input input the first microwave signal and
Second microwave signal is total to time-base signal to be synchronous.
It is preferred that, the sampling oscilloscope includes multiple data channel and trigger port；
The two paths of signals that the orthocoupler is sent inputs the first passage of the sampling oscilloscope and second and led to respectively
Road；
Time domain waveform output end is connected with other data channel in addition to first passage and second channel；
The second road signal of the power splitter output inputs the trigger port.
It is preferred that, the device is further disposed at the bandpass filtering between orthocoupler and the first microwave signal input
Device.
It is preferred that, the phase calibration unit includes
When base distortion correcting module, for as first passage and second channel generation the calculating when base distortion needed for
Data be modified, base distortion correction value during acquisition；
Compensating module, by when base distortion correction value be combined with the comb spectrum generator time domain waveform that is calibrated, obtain
The comb spectrum generator time domain waveform of base distortion during amendment；
Fourier transformation module, the comb spectrum generator time domain waveform of base distortion during to the amendment carries out Fourier's change
Change, acquisition is calibrated comb spectrum generator phase spectrum；
Phase spectrum calibration module, school is carried out based on least-squares estimation to the comb spectrum generator phase spectrum that is calibrated
It is accurate.
The step of a kind of method calibrated for comb spectrum generator phase spectrum, this method, includes：
Orthocoupler produces the sinusoidal signal that two-way phase difference is 90 ° based on the first microwave signal, and input takes respectively
The first passage and second channel of sample oscillograph；
Second microwave signal is divided into first via signal and second road signal by power splitter；
It is calibrated comb spectrum generator and is based on the first via signal output time-domain waveform, and inputs to sampling oscilloscope
Other data channel in addition to first passage and second channel；
Sampling oscilloscope is under the triggering of the second road signal, based on the sinusoidal signal that the two-way phase difference is 90 °
Data when producing calculating needed for base distortion, and gather the time domain waveform produced by comb spectrum generator；
Data during based on the calculating needed for base distortion and comb spectrum generator time domain waveform is calibrated, to being calibrated comb
Shape spectrum generator carries out phase spectrum calibration.
It is preferred that, described pair is calibrated the step of comb spectrum generator carries out phase alignment and includes
Data during to as the calculating of first passage and second channel generation needed for base distortion are modified, during acquisition
Base distortion correction value；
By when base distortion correction value be combined with the comb spectrum generator time domain waveform that is calibrated, obtain amendment when base lose
Genuine comb spectrum generator time domain waveform；
The comb spectrum generator time domain waveform of base distortion during to the amendment carries out Fourier transformation, and acquisition is calibrated pectination
Compose generator phase spectrum；
The comb spectrum generator phase spectrum that is calibrated is calibrated based on least-squares estimation.
It is preferred that, first microwave signal and the second microwave signal are total to time-base signal to be synchronous.
It is preferred that, further comprise the step of this method carrying out bandpass filtering treatment to first microwave signal, filter out
Interfering frequency.
Beneficial effects of the present invention are as follows：
Apparatus of the present invention can obtain accurate comb spectrum generator phase spectrum calibration result, make different measuring systems, no
With under measuring condition gained phase spectrum calibration result between can directly be compared.
Brief description of the drawings
The embodiment to the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 shows a kind of schematic device calibrated for comb spectrum generator phase spectrum.
In figure, 1. first microwave signal sources, 2. second microwave signal sources, 3. bandpass filters, 4. power splitters, 5. corss couplings
Clutch, 6. comb spectrum generators, 7. sampling oscilloscopes, 8. computers, A1. the first microwave signal inputs, the microwaves of A2. second letter
Number input, A3. drive signal output ends, A4. time-domain signal inputs.
Embodiment
In order to illustrate more clearly of the present invention, the present invention is done further with reference to preferred embodiments and drawings
It is bright.Similar part is indicated with identical reference in accompanying drawing.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
As shown in figure 1, a kind of device calibrated for comb spectrum generator phase spectrum, including the first microwave signal source 1, the
Two microwave signal sources 2, bandpass filter 3, power splitter 4, orthocoupler 5, comb spectrum generator 6, sampling oscilloscope 7 is calculated
Machine 8, the first microwave signal input A1, the second microwave signal input A2, drive signal output terminals A 3, time-domain signal input
A4；The first microwave signal that first microwave signal source 1 is sent is inputted to bandpass filter 3 through the first microwave signal input A1
Input, the signal output part of bandpass filter 3 is connected by coaxial cable with the signal input part of orthocoupler 5, orthogonal
The two-way output end of coupler 5 is connected by isometric coaxial cable with the first passage and second channel of sampling oscilloscope 7；The
The microwave signal synchronous output end of one microwave signal source 1 is connected to the synchronous of the second microwave signal source 2 by coaxial cable and inputted
End, the second microwave signal that the second microwave signal source 2 is sent is inputted to the input of power splitter 4 through the second microwave signal input A2
End, the drive signal of the first output end output of power splitter 4 is inputted to comb spectrum generator 6 by drive signal output terminals A 3,
Drive signal is provided for it, comb spectrum generator 6 is inputted based on the time domain waveform signal that drive signal is exported by time-domain signal
A4 is held to input other data channel in addition to first passage and second channel of sampling oscilloscope 7；Second output of power splitter 4
End is connected by coaxial cable with the triggering end of sampling oscilloscope 7；The signal output part of sampling oscilloscope 7 is connected with computer 8,
Phase calibration unit is provided with computer 8, base distortion correcting module when phase calibration unit includes, compensating module, Fourier becomes
Change the mold block and phase spectrum calibration module.
The course of work of device as shown in Figure 1：First microwave signal of the first microwave signal source 1 is defeated through the first microwave signal
Enter to hold A1 to input to the input of bandpass filter 3, filtering out the phase spectrum calibration of interference comb spectrum generator through bandpass filter 3 ties
After the frequency component of fruit, first microwave signal inputs orthocoupler 5 by the output end of bandpass filter 3 by coaxial cable
Input, it is 90 ° of sinusoidal signal, phase that output end of the microwave signal through orthocoupler 5, which is output as two-way phase difference,
Difference is that 90 ° of two-way sinusoidal signal inputs the first passage input and second of sampling oscilloscope 7 through isometric coaxial cable respectively
Path input, two-way input signal as amendment sampling oscilloscope 7 when base distortion data；While the first microwave signal source 1
Output end is by the synchronous input end of coaxial cable synchronism output microwave signal to the second microwave signal source 2, to realize two letters
The synchronism output in number source, second microwave signal synchronous with the first microwave signal source 1 of the second microwave signal source 2 is through the second microwave
Signal input part A2 is inputted to the input of power splitter 4, and second microwave signal is divided into two paths of signals, work(point by the work(of power splitter 4
The first via signal of the work(point of device 4 is inputted to comb spectrum generator 6 by drive signal output terminals A 3, is used as comb spectrum generator 6
Drive signal, comb spectrum generator be based on the drive signal output time-domain signal, by time domain waveform input A4 input take
Other data channel in addition to first passage and second channel of sample oscillograph 7；The second road signal of the work(point of power splitter 4 passes through
Coaxial cable inputs the triggering input of sampling oscilloscope 7, and starting measurement for sampling oscilloscope 7 provides trigger signal；Sampling is shown
Ripple device 7 proceeds by measurement after trigger signal is received, and on the one hand sampling oscilloscope 7 is measured for correcting sampling oscilloscope 7
When base distortion signal data, the on the other hand output of measurement comb spectrum generator 6 time domain waveform signal；Computer 8 and sampling
Oscillograph 7 is connected by GPIB-USB data wires, and the when base distortion correcting module in computer 8 is gathered by acquisition software to be calculated
When data needed for base distortion and comb spectrum generator original time domain waveform signal, then by when base distortion fixed software obtain
When base distortion correction value；Compensating module by when base distortion correction value be combined with the original time domain waveform of comb spectrum generator, obtain
To base distortion later comb spectrum generator time domain waveform during amendment；Fourier transformation module then pair when base distortion it is revised when
Domain waveform carries out Fourier transform, obtains comb spectrum generator phase spectrum；Phase spectrum calibration module is carried out based on most to phase spectrum
What a young waiter in a wineshop or an inn multiplied estimation removes slope algorithm, makes phase spectrum flat distribution, completes the calibration of comb spectrum generator phase spectrum.
It is using the specific implementation step calibrated to comb spectrum generator phase spectrum of calibrating installation of the present invention：
A) output end of first microwave signal source 1 is connected to the input of bandpass filter 3 by coaxial cable；
B) output end of bandpass filter 3 is connected to the input of orthocoupler 5, orthogonal coupling by coaxial cable
The output two-way phase difference of device 5 is 90 ° of sinusoidal signal；
C) the two-way output end of orthocoupler 5 is connected to the first passage and of sampling oscilloscope 7 by coaxial cable
Two passages；
D) synchronous output end of the first microwave signal source 1 is connected to the same of the second microwave signal source 2 by coaxial cable
Walk input；
E) output end of the second microwave signal source 2 is connected to power splitter 4, the first work(of power splitter 4 by coaxial cable
Sub-signal output end is connected to the driving signal input of comb spectrum generator 6 by coaxial cable；
F) triggering for the second work(sub-signal output end of power splitter 4 being connected into sampling oscilloscope 7 by coaxial cable is defeated
Enter end；
G) the time domain waveform output end of comb spectrum generator 6 is connected to sampling oscilloscope 7 except first by coaxial cable
Other data channel outside passage and second channel；
H) computer 8 is connected with sampling oscilloscope 7 by GPIB-USB data wires, the when base distortion in computer 8 is repaiied
Positive module gathers data needed for base distortion and the original time domain waveform signal of comb spectrum generator when calculating by acquisition software, so
Afterwards by when base distortion fixed software obtain when base distortion correction value；
I) compensating module by when base distortion correction value be combined with the original time domain waveform of comb spectrum generator, corrected
When the later comb spectrum generator time domain waveform of base distortion；
J) fourier transformation module then pair when the revised time domain waveform of base distortion carry out Fourier transform, obtain comb spectrum
Generator phase spectrum；
K) phase spectrum calibration module carries out removing slope algorithm based on least-squares estimation to phase spectrum, makes phase spectrum flat
Distribution, completes the calibration of comb spectrum generator phase spectrum.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention, for those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms, all embodiments can not be exhaustive here, it is every to belong to this hair
Row of the obvious changes or variations that bright technical scheme is extended out still in protection scope of the present invention.
Claims (9)
1. a kind of device calibrated for comb spectrum generator phase spectrum, it is characterised in that the device includes,
First microwave signal input；
Second microwave signal input；
Orthocoupler, the sinusoidal signal that two-way phase difference is 90 ° is produced based on the first microwave signal；
Power splitter, is divided into first via signal and second road signal by the second microwave signal；
Drive signal output end, drive signal is provided to be calibrated comb spectrum generator；
Time domain waveform input, input is calibrated the time domain waveform that comb spectrum generator is produced based on the drive signal；
Sampling oscilloscope, under the triggering of the second road signal, is gathered based on the sinusoidal signal that the two-way phase difference is 90 °
Data and the time domain waveform for being calibrated the generation of comb spectrum generator during the calculating of generation needed for base distortion；
Phase calibration unit, data during based on the calculating needed for base distortion and is calibrated comb spectrum generator time domain waveform,
Phase spectrum calibration is carried out to being calibrated comb spectrum generator.
2. device according to claim 1, it is characterised in that the first microwave signal input and the second microwave signal
The first microwave signal and the second microwave signal of input input are total to time-base signal to be synchronous.
3. device according to claim 1, it is characterised in that the sampling oscilloscope includes multiple data channel and triggering
Passage；
The two paths of signals that the orthocoupler is sent inputs the first passage and second channel of the sampling oscilloscope respectively；
Time domain waveform output end is connected with other data channel in addition to first passage and second channel；
The second road signal of the power splitter output inputs the trigger port.
4. device according to claim 1, it is characterised in that the device further comprises being arranged on orthocoupler and
Bandpass filter between one microwave signal input.
5. device according to claim 1, it is characterised in that base distortion amendment mould when the phase calibration unit includes
Block, data during for as the calculating of first passage and second channel generation needed for base distortion are modified, during acquisition
Base distortion correction value；
Compensating module, by when base distortion correction value be combined with the comb spectrum generator time domain waveform that is calibrated, corrected
When base distortion comb spectrum generator time domain waveform；
Fourier transformation module, the comb spectrum generator time domain waveform of base distortion during to the amendment carries out Fourier transformation, obtains
Comb spectrum generator phase spectrum must be calibrated；
Phase spectrum calibration module, is calibrated based on least-squares estimation to the comb spectrum generator phase spectrum that is calibrated.
6. a kind of method calibrated for comb spectrum generator phase spectrum, it is characterised in that include the step of this method：
Orthocoupler produces the sinusoidal signal that two-way phase difference is 90 ° based on the first microwave signal, and input sampling is shown respectively
The first passage and second channel of ripple device；
Second microwave signal is divided into first via signal and second road signal by power splitter；
It is calibrated comb spectrum generator and is based on the first via signal output time-domain waveform, and inputs to sampling oscilloscope except the
Other data channel outside one passage and second channel；
Sampling oscilloscope is produced under the triggering of the second road signal based on the two-way phase difference for 90 ° of sinusoidal signal
Data during calculating needed for base distortion, and gather the time domain waveform for being calibrated the generation of comb spectrum generator；
Data during based on the calculating needed for base distortion and comb spectrum generator time domain waveform is calibrated, to being calibrated comb spectrum
Generator carries out phase spectrum calibration.
7. method according to claim 6, it is characterised in that described pair is calibrated comb spectrum generator and carries out phase spectrum school
Accurate step includes
Data during to as the calculating of first passage and second channel generation needed for base distortion are modified, and base loses during acquisition
True correction value；
By when base distortion correction value be combined with the comb spectrum generator time domain waveform that is calibrated, base distortion when obtaining amendment
Comb spectrum generator time domain waveform；
The comb spectrum generator time domain waveform of base distortion during to the amendment carries out Fourier transformation, and acquisition is calibrated comb spectrum hair
Raw device phase spectrum；
The comb spectrum generator phase spectrum that is calibrated is calibrated based on least-squares estimation.
8. method according to claim 6, it is characterised in that first microwave signal and the second microwave signal are synchronous
Common time-base signal.
9. method according to claim 6, it is characterised in that further comprise to first microwave the step of this method
Signal carries out bandpass filtering treatment, filters out interfering frequency.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106411413A (en) * | 2016-09-28 | 2017-02-15 | 北京无线电计量测试研究所 | Comb-shaped spectrum signal generation device based on light source array |
| CN106603166B (en) * | 2016-10-21 | 2021-04-02 | 北京无线电计量测试研究所 | Vector measurement device and method for broadband modulation signal |
| CN107462854B (en) * | 2017-06-29 | 2019-09-24 | 中国电子科技集团公司第四十一研究所 | A kind of method of automatic acquisition YIG tuned filter offset data |
| CN107219491B (en) * | 2017-07-20 | 2023-05-26 | 成都玖锦科技有限公司 | Eight-channel calibration module and calibration method |
| CN107703562B (en) * | 2017-09-26 | 2019-03-19 | 北京无线电计量测试研究所 | A kind of apparatus and method for the calibration of high band balanced bandwidth photodetector common-mode rejection ratio |
| CN108988851B (en) * | 2018-06-11 | 2023-02-03 | 西安空间无线电技术研究所 | Equal-interval multi-frequency-point cross-connection power division frequency synthesis device |
| CN109581018B (en) * | 2019-01-08 | 2022-02-01 | 北京工业大学 | Time base error synchronous compensation method and device of broadband sampling oscilloscope |
| CN110068728B (en) * | 2019-03-21 | 2021-10-01 | 中国计量科学研究院 | Method and device for determining pulse modulation signal phase spectrum and computer equipment |
| CN111580033B (en) * | 2020-06-24 | 2022-09-20 | 中国航空工业集团公司北京长城计量测试技术研究所 | Method for calibrating phase difference in dynamic calibration process |
| US11515863B2 (en) | 2021-03-08 | 2022-11-29 | Rohde & Schwarz Gmbh & Co. Kg | Comb signal generator and method of providing a phase and amplitude reference |
| CN113447873B (en) * | 2021-07-12 | 2022-07-19 | 北京无线电计量测试研究所 | Sampling oscilloscope complex frequency response calibration device and method |
| CN113777987B (en) * | 2021-09-13 | 2024-08-30 | 天津津航计算技术研究所 | Self-adaptive discrete signal acquisition device supporting waveform correction |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7078940B2 (en) * | 2004-06-02 | 2006-07-18 | Lucent Technologies Inc. | Current comb generator |
| DE102007028725A1 (en) * | 2007-06-21 | 2008-12-24 | Rohde & Schwarz Gmbh & Co. Kg | Method and apparatus for calibrating network analyzers with a comb generator |
| JP4949496B2 (en) * | 2010-02-26 | 2012-06-06 | 住友大阪セメント株式会社 | Optical frequency comb generator, optical pulse generator using the same, optical frequency comb generator, and optical pulse generator using the same |
| CN103529296B (en) * | 2013-10-29 | 2016-08-24 | 北京无线电计量测试研究所 | A kind of device and method for measuring comb spectrum generator phase spectrum |
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