CN103913633B - Based on high frequency spectrum resolving power phase spectrum measuring apparatus and the method for multifrequency sine signal - Google Patents
Based on high frequency spectrum resolving power phase spectrum measuring apparatus and the method for multifrequency sine signal Download PDFInfo
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Abstract
The present invention relates to frequency microwave signal measurement technique field, the open high frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal, comprising: multifrequency sine signal generating module, for generation of multifrequency sine signal; Phase differential measures module, for being set up multiple tested frequency, and receives measured signal, calculates the phase difference measurements of measured signal and described multifrequency sine signal; System calibration module, carries out system calibration for described phase differential is measured module, obtains the phase measurement error on described each tested frequency; Calculate module, measure the measuring result of module for the measuring result according to error correcting method, described system calibration module and described phase differential, calculate the phase spectrum of measured signal. The also measuring method of the open high frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal. The present invention breaks through technical bottleneck and the index limit of existing harmonic wave scheme, realizes the phase measurement of kHz level high frequency spectrum resolving power in GHz frequency range.
Description
Technical field
The present invention relates to frequency microwave signal measurement technique field, in particular to based on the high frequency spectrum resolving power phase spectrum measuring apparatus of multifrequency sine signal and method.
Background technology
Non-linear vector network analyzer NVNA is the upgrading on vector network analyzer VNA basis and transformation, by introducing extra phase reference signal (at present by surge generator impulsegenerator, there is provided also known as comb generator combgenerator), the measurement of the latter's phase spectrum is realized, as shown in Figure 1 according to the phase differential of reference signal and measured signal. This kind of measurement means requires that the spectrum component of reference signal covers whole frequencies of measured signal, and the power of every root spectrum line meets measurement requirement (being generally not less than-100dBm), and the frequency that can not cover for reference signal then cannot effectively be measured. Existing commercial NVNA product adopts " time domain narrow pulse signal " for providing phase place reference, and its spectral resolution is that (being rated for 10MHz, namely Frequency point is 10MHz for the inverse of pulse repetition time, 20MHz, 30MHz ...), it is a kind of harmonic signal, as shown in Figures 2 and 3. Along with the raising of spectral resolution, the repeat cycle of pulse needs to increase, and causes mean power significantly to reduce, and the energy of each spectrum line can not meet measurement requirement (generally need to be greater than-100dBm). Therefore, there is the bottleneck of spectral resolution in this technical scheme: spectral resolution at present that be difficult to provide kHz rank in GHz frequency range, namely when the frequency spectrum of measured signal is spaced apart kHz rank, this kind of reference signal scheme cannot cover all tested frequencies with enough energy, thus can not effectively measure.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of high frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal and method.
For solving the problems of the technologies described above, the present invention provides a kind of high frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal, comprising: multifrequency sine signal generating module, for generation of multifrequency sine signal; Phase differential measures module, for being set up multiple tested frequency, and receives measured signal, calculates the phase differential of measured signal and described multifrequency sine signal; System calibration module, carries out system calibration for described phase differential is measured module, obtains the phase measurement error on described each tested frequency; Calculate module, measure the measuring result of module for the measuring result according to error correcting method, described system calibration module and described phase differential, calculate the phase spectrum of measured signal.
Further, described multifrequency sine signal generating module comprises vector signal generator or the programmable signal generating unit of any waveform generator or other independent developments.
Further, it is characterised in that, described phase differential is measured module and is comprised vector network analyzer or the device that can be used for the measurement of multichannel signal phase difference of hyperchannel oscilloscope or other independent developments.
Further, it is set up multiple tested frequency described in be less than or equal the parameter producing multifrequency sine signal setting.
Further, based on the high frequency spectrum resolving power phase spectrum measuring apparatus of multifrequency sine signal, also comprise read module, for measuring at described phase differential, module reads measured signal and the phase difference measurements of described multifrequency sine signal.
The present invention also provides the measuring method based on the described high frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal, comprising:
Step 10, measure the multiple tested frequency of module installation at described phase differential, receive the multifrequency sine signal that measured signal and multifrequency sine signal generating module export simultaneously;
Step 20, multifrequency sine signal is set in described multifrequency sine signal generating module, calculates described measured signal and the phase differential of described multifrequency sine signal;
Step 30, carry out system calibration by described system calibration module, obtain the phase measurement error on described each tested frequency;
Step 40, according to error correcting method, described step 20 and 30 measuring result, calculate measured signal phase spectrum.
Further, described multifrequency sine signal generating module comprises vector signal generator or any waveform generator, or the programmable signal generating unit of other independent developments.
Further, it is characterised in that, described phase differential is measured module and is comprised vector network analyzer, or hyperchannel oscilloscope, or the device that can be used for the measurement of multichannel signal phase difference of other independent developments.
Further, it is set up multiple tested frequency described in be less than or equal the parameter producing multifrequency sine signal setting.
Further, the method is also included in described phase differential measurement module and reads measured signal and the phase difference measurements of described multifrequency sine signal.
High frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal provided by the invention and method have avoided in existing harmonic wave scheme the contradiction between " spectral resolution and spectrum line power ", namely the problem that reference signal spectrum line power does not reduce with the raising of spectral resolution, use the multifrequency sine signal of arrowband to realize phase spectrum as phase place with reference to (instead of existing harmonic wave scheme) to measure, thus break through technical bottleneck and the index limit of existing harmonic wave scheme, GHz frequency range realizes the phase measurement of kHz level high frequency spectrum resolving power.
Accompanying drawing explanation
Fig. 1 is that existing commercial nonlinear networksanalysis instrument NVNA forms block diagram;
Fig. 2 is time domain narrow pulse signal schematic diagram, and wherein the repeat cycle of pulse sequence is T;
Fig. 3 is the broadband harmonic spectrum diagram that time domain narrow pulse signal is corresponding, and spectral resolution is the inverse of repetition cycle T, and the Frequency point of covering is �� f, 2 �� f, 3 �� f ...;
Fig. 4 is the frequency domain amplitude spectrum schematic diagram of multifrequency sine signal; Wherein, the multifrequency rate that multifrequency sine signal is a kind of arrowband becomes sub-signal, and its spectral resolution can reach 0.1kHz��1000kHz;
The structure block diagram of a kind of high frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Phase measurement for 0.1��1000kHz high frequency spectrum resolving power is applied, the technique means of the present invention adopts multifrequency sine multisine signal (such as Fig. 4) of arrowband to provide phase place reference, line is composed according to the reference that test demand provides 0.1��1000kHz high frequency spectrum resolving power, power to be not less than-60dBm, by measuring this multifrequency sine signal and the measured signal phase differential at each frequency, through the calibration of necessary system and error correction, obtain the phase spectrum of measured signal, as shown in Figure 5.
See Fig. 5, a kind of high frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal that the embodiment of the present invention provides, comprising: multifrequency sine signal generating module, phase differential are measured module, system calibration module and calculated module. Wherein, multifrequency sine signal generating module is for generation of multifrequency sine signal. In actual applications, multifrequency sine signal generating module is for providing the multifrequency sine signal needed for measurement, it is desired to cover the Frequency point that all measurements are concerned about simultaneously. Specifically can use vector signal generator VSG or any waveform generator AWG (also claiming arbitrary-function generator AFG), it is also possible to realized by the signal generation apparatus of other self-controls or assembling. Multifrequency sine signal is that a kind of broad sense " non-harmonic wave " multifrequency rate becomes sub-signal, the Special Circumstances of frequency interval such as is not only. Owing to VSG and AWG available multifrequency sine signal frequency interval can reach 100Hz��1MHz rank, and the energy respectively composing line does not change with the adjustment of resolving power (can remain at more than-60dBm, meet measurement requirement), therefore, it is possible to realize the phase measurement of kHz level high frequency spectrum resolving power in GHz frequency range. Phase differential is measured module and is used for being set up multiple tested frequency, and receives measured signal, calculates the phase difference measurements of measured signal and described multifrequency sine signal. Due to the phase differential being obtained multifrequency sine signal and measured signal is concerned about on frequency in all measurements, vector network analyzer VNA specifically can be used, or hyperchannel oscilloscope, it is also possible to realized by the measuring apparatus of other self-controls or assembling. System calibration module is used for that described phase differential is measured module and carries out system calibration, obtains the phase measurement error on described each tested frequency. Calculate module and it is used for the measuring result according to error correcting method, system calibration module and the measuring result of described phase differential measurement module, calculate the phase spectrum of measured signal. Wherein, system calibration and error correcting method are disclosed technology, comprising: by measuring the known standard signal of phase spectrum in advance, obtain phase difference measurement and measured signal phase spectrum be truly worth between intrinsic systematic error, and then compensate in follow-up measuring process and revise. Associated viscera can refer to reference:
[1]J.B.Scott,P.S.Blockley,A.E.Parker,��Anewinstrumentarchitectureformillimeter-wavetime-domainsignalanalysis,��63rdARFTGConference,pp.47�C51,2004.
[2]P.Blockley,J.Scott,��Mixer-Based,Vector-Corrected,VectorSignal/NetworkAnalyzerOffering300kHz-20GHzBandwidthandTraceablePhaseResponse,��2005IEEEMTT-SInternationalMicrowaveSymposiumDigest,pp.1497-1500,Jun2005.
[3]W.V.Moer,Y.Rolain,��ALarge-SignalNetworkAnalyzer:WhyIsItNeeded��,IEEEMicrowaveMagazine,pp.46-61Dec2006
[4]MaoliuLin,YichiZhang.��Covariance-matrix-baseduncertaintyanalysisforNVNAmeasurements,��IEEETrans.Instrum. Meas.,vol.61,no.1,pp.93-102,Jan.2012.
[5]MichaelHiebel.FundamentalsofVectorNetworkAnalyzer.
Said apparatus also comprises read module, reads measured signal and the phase difference measurements of described multifrequency sine signal for measuring at described phase differential in module.
The embodiment of the present invention also provides the measuring method of the high frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal, comprising:
Step 10, measure the multiple tested frequency of module installation at described phase differential, receive the multifrequency sine signal that measured signal and multifrequency sine signal generating module export simultaneously; Wherein, it is set up multiple tested frequency be less than or equal the parameter producing multifrequency sine signal setting.
Step 20, multifrequency sine signal is set in described multifrequency sine signal generating module, calculates described measured signal and the phase difference measurements of described multifrequency sine signal;
Step 30, carry out system calibration by described system calibration module, obtain the phase measurement error on described each tested frequency;
Step 40, according to error correcting method, described step 20 and 30 the measuring result of measuring result, calculate the phase spectrum of measured signal.
The measuring method based on the high frequency spectrum resolving power phase spectrum measuring apparatus of the multifrequency sine signal embodiment of the present invention provided below in conjunction with following examples is described further.
Embodiment one
Situation for measured signal as " carrier frequency 2.4GHz, spectral resolution 1kHz, modulation band-width 50kHz ", the phase place of " 1kHz spectral resolution, be not less than-100dBm power " can not realize the measurement of 51 tested frequency phase spectrums to existing NVNA commercial product with reference to spectrum line because cannot provide near 2.4GHz, and the technical scheme adopting the present invention needs to carry out following operation:
Adopt VSG and vector network analysis VNA, build measuring system as shown in Figure 5.
Step 10,51 tested frequencies are set on VNA: 2.4GHz, 2.4GHz �� 1kHz, 2.4GHz �� 2kHz ..., 2.4GHz �� 25kHz.
Step 20, identical parameter is set on VSG, namely provides mid-frequency to be that 2.4GHz, frequency spectrum are spaced apart 1kHz, number of frequencies be 51, the multifrequency sine signal of each spectrum line power-50dBm.
Step 30, system calibration module carry out system calibration according to document [1-5], obtain the phase measurement error on each tested frequency.
Step 40, access measured signal, read measured signal and the phase difference measurements of multifrequency sine signal on VNA.
Step 50, measuring result according to the error correcting method of document [1-5] and step 30 and 40, calculate the phase spectrum of measured signal.
Embodiment two
For the two tone test of power amplifier, if requirement of experiment measures " mid-frequency 5.8GHz, double-tone interval is followed successively by 100kHz, 200kHz, 400kHz " 3 rank intermodulation export phase spectrums, existing NVNA commercial product is because " 50kHz spectral resolution near 5.8GHz cannot be provided, be not less than-100dBm power " phase place with reference to spectrum line and 5.8GHz �� 50kHz can not be realized, 5.8GHz �� 100kHz, 5.8GHz �� 150kHz, 5.8GHz �� 200kHz, 5.8GHz �� 300kHz, 5.8GHz �� 600kHz amounts to the measurement of 12 tested frequency phase spectrums, and the technical scheme adopting the present invention needs to carry out following operation:
Adopt any waveform generator of AWG and VNA, build measuring system as shown in Figure 5.
Step 10, interval scanning frequency: 5.8GHz, 5.8GHz �� 50kHz, 5.8GHz �� 100kHz, the 5.8GHz such as arrange 25 on VNA �� 150kHz ..., 5.8GHz �� 600kHz, wherein 5.8GHz �� 50kHz, 5.8GHz �� 100kHz, 5.8GHz �� 150kHz, 5.8GHz �� 200kHz, 5.8GHz �� 300kHz, 5.8GHz �� 600kHz are 12 effective tested frequencies.
Step 20, utilize AWG to generate frequency is 5.8GHz �� 50kHz, 5.8GHz �� 100kHz, 5.8GHz �� 150kHz, 5.8GHz �� 200kHz, 5.8GHz �� 300kHz, 5.8GHz �� 600kHz, each spectrum line power-30dBm multifrequency sine signal.
Step 30, system calibration module carry out system calibration according to document [1-5], obtain the phase measurement error on each tested frequency.
Step 40, by power amplifier output terminal connect measuring system.
Step 50, for power amplifier provide 5.8GHz �� 50kHz (100kHz interval) double-tone excitation, VNA reads the phase difference measurement of 5.8GHz �� 50kHz, 5.8GHz �� 150kHz (3 rank intermodulation Frequency point) four effective frequencies; Error correcting method according to document [1-5] and the corresponding frequency observed value of the calibration result correction of step 30, the 3 rank intermodulation calculated in this situation export phase spectrums.
Step 60, for power amplifier provide 5.8GHz �� 100kHz (200kHz interval) double-tone excitation, VNA reads the phase difference measurement of 5.8GHz �� 100kHz, 5.8GHz �� 300kHz (3 rank intermodulation Frequency point) four effective frequencies; Error correcting method according to document [1-5] and the corresponding frequency observed value of the calibration result correction of step 30, the 3 rank intermodulation calculated in this situation export phase spectrums.
Step 70, for power amplifier provide 5.8GHz �� 200kHz (400kHz interval) double-tone excitation, VNA reads the phase difference measurement of 5.8GHz �� 200kHz, 5.8GHz �� 600kHz (3 rank intermodulation Frequency point) four effective frequencies; Error correcting method according to document [1-5] and the corresponding frequency observed value of the calibration result correction of step 30, the 3 rank intermodulation calculated in this situation export phase spectrums.
High frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal provided by the invention and method have avoided in existing harmonic wave scheme the contradiction between " spectral resolution and spectrum line power ", namely the problem that reference signal spectrum line power does not reduce with the raising of spectral resolution, use the multifrequency sine signal of arrowband to realize phase spectrum as phase place with reference to (instead of existing harmonic wave scheme) to measure, thus break through technical bottleneck and the index limit of existing harmonic wave scheme, GHz frequency range realizes the phase measurement of kHz level high frequency spectrum resolving power.
It should be noted last that, above embodiment is only in order to illustrate the technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed explanation, it will be understood by those within the art that, the technical scheme of the present invention can be modified or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the right of the present invention.
Claims (10)
1. the high frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal, it is characterised in that, comprising:
Multifrequency sine signal generating module, for generation of multifrequency sine signal;
Phase differential measures module, for being set up multiple tested frequency, and receives measured signal, calculates the phase differential of measured signal and described multifrequency sine signal;
System calibration module, carries out system calibration for described phase differential is measured module, obtains the phase measurement error on described each tested frequency;
Calculate module, measure the measuring result of module for the measuring result according to error correcting method, described system calibration module and described phase differential, calculate the phase spectrum of measured signal.
2. the high frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal according to claim 1, it is characterised in that, described multifrequency sine signal generating module comprises vector signal generator or any waveform generator.
3. the high frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal according to claim 1, it is characterised in that, described phase differential is measured module and is comprised vector network analyzer, or hyperchannel oscilloscope.
4. the high frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal according to claim 1, it is characterised in that, described in be set up multiple tested frequency be less than or equal produce multifrequency sine signal setting parameter.
5. the high frequency spectrum resolving power phase spectrum measuring apparatus based on multifrequency sine signal according to the arbitrary item of claim 1-4, it is characterised in that, also comprise:
Read module, reads measured signal and the phase difference measurements of described multifrequency sine signal for measuring at described phase differential in module.
6. one kind based on described in claim 1 based on the measuring method of the high frequency spectrum resolving power phase spectrum measuring apparatus of multifrequency sine signal, it is characterised in that, comprising:
Step 10, measure the multiple tested frequency of module installation at described phase differential, receive the multifrequency sine signal that measured signal and multifrequency sine signal generating module export simultaneously;
Step 20, multifrequency sine signal is set in described multifrequency sine signal generating module, calculates described measured signal and the phase differential of described multifrequency sine signal;
Step 30, carry out system calibration by described system calibration module, obtain the phase measurement error on described each tested frequency;
Step 40, according to error correcting method, described step 20 and 30 measuring result, calculate measured signal phase spectrum.
7. method according to claim 6, it is characterised in that, described multifrequency sine signal generating module comprises vector signal generator or any waveform generator.
8. method according to claim 6, it is characterised in that, described phase differential is measured module and is comprised vector network analyzer, or hyperchannel oscilloscope.
9. method according to claim 6, it is characterised in that, described in be set up multiple tested frequency be less than or equal produce multifrequency sine signal setting parameter.
10. method according to the arbitrary item of claim 6-9, it is characterised in that, also comprise:
Measure at described phase differential and module reads measured signal and the phase difference measurements of described multifrequency sine signal.
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| US9350470B1 (en) * | 2015-02-27 | 2016-05-24 | Keysight Technologies, Inc. | Phase slope reference adapted for use in wideband phase spectrum measurements |
| CN105115622A (en) * | 2015-08-12 | 2015-12-02 | 合肥工业大学 | Denoising algorithm of fiber Raman temperature sensing system based on independent component analysis |
| US10288660B2 (en) * | 2017-07-12 | 2019-05-14 | Rohde & Schwarz Gmbh & Co. Kg | Comb signal generator, measuring device and method |
| CN107884621B (en) * | 2017-10-11 | 2019-11-22 | 中国计量科学研究院 | The non-linear vector network analyzer measurement method and device of quarter-phase reference |
| CN109116111B (en) * | 2018-09-05 | 2020-09-15 | 山东交通学院 | High-precision phase difference measuring method and circuit |
| 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 |
| CN110568063A (en) * | 2019-09-16 | 2019-12-13 | 天津工业大学 | Multi-frequency excitation eddy current field phase gradient spectrum nondestructive testing method and system |
| CN112702127B (en) * | 2020-12-07 | 2022-10-25 | 北京无线电计量测试研究所 | T-type network measuring method and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685113A (en) * | 2008-09-24 | 2010-03-31 | 北京北广科技股份有限公司 | Method and device for measuring phase shift |
| CN102901876A (en) * | 2012-11-13 | 2013-01-30 | 哈尔滨工业大学 | Method for measuring inter-modulation spectral lines by using network analyzer based on multi-voice excited step recovery diode (SRD) pulse generator |
| CN103543333A (en) * | 2013-10-22 | 2014-01-29 | 哈尔滨理工大学 | High-frequency signal phase difference measurement method and device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2006038468A1 (en) * | 2004-10-01 | 2006-04-13 | Matsushita Electric Industrial Co., Ltd. | Phase difference measuring circuit |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685113A (en) * | 2008-09-24 | 2010-03-31 | 北京北广科技股份有限公司 | Method and device for measuring phase shift |
| CN102901876A (en) * | 2012-11-13 | 2013-01-30 | 哈尔滨工业大学 | Method for measuring inter-modulation spectral lines by using network analyzer based on multi-voice excited step recovery diode (SRD) pulse generator |
| CN103543333A (en) * | 2013-10-22 | 2014-01-29 | 哈尔滨理工大学 | High-frequency signal phase difference measurement method and device |
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