CN107800443A - RF passive resonance sensor characteristic solution adjusts translation circuit - Google Patents
RF passive resonance sensor characteristic solution adjusts translation circuit Download PDFInfo
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- CN107800443A CN107800443A CN201711075613.1A CN201711075613A CN107800443A CN 107800443 A CN107800443 A CN 107800443A CN 201711075613 A CN201711075613 A CN 201711075613A CN 107800443 A CN107800443 A CN 107800443A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
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Abstract
The invention discloses a kind of RF passive resonance sensor characteristic solution to adjust translation circuit, is related to wireless senser conversion demodulation technical field of measurement and test.The translation circuit includes：Driving source, power divider and width Phase Receiver unit, the driving source is divided into multichannel after power divider and inputs to corresponding module in width Phase Receiver unit, the width Phase Receiver unit is used for the signal condition and quantization acquisition module that rear end is sent into measured signal is downconverted to after intermediate-freuqncy signal exports, and translates the signals into discrete time-domain signal and supplies back-end processing.The translation circuit has the advantages that reference frequency output is wide, frequency hopping speed is fast, phase noise is low, frequency resolution is high, frequency sweep cycle is high and the response time is short.
Description
Technical field
The present invention relates to wireless senser to convert demodulation technical field of measurement and test, more particularly to a kind of RF passive resonance sensor
Characteristic solution adjusts translation circuit.
Background technology
In network analysis test process is studied, most of research institutes are all using the companies such as Agilent, NI, English
WayneKerr companies of state, the impedance analysis instrument or vector network analyzer device of the production of Japanese HIOKI companies.
AgilentE4991A RF impedances/material analysis provides margin impedance measurement performance and powerful built-in point
Analyse function.It will provide innovative function for the component within component and circuit designer measurement 3GHz, help them to enter
Row R＆D work.Different from reflectometry technique, E4991A uses radio-frequency current-voltage (RF-IV) technology, can widely hinder
More accurate impedance measurements are provided in anti-scope.Base impedance precision is +/- 0.8%.High Q precision is advantageous to carry out low work(
Consume component analysis.Built-in synthesizer has 1MHz to 3GHz scanning range and 1mHz resolution ratio.
Speed, precision and the versatility of AgilentE5071C Network Analyzers are that new standard is set up in radio frequency network analysis.
Analyzer has extensive measurement function, can meet that multiple network analyzes demand, can be multiple industry fields (such as channel radio
Letter, automobile, semiconductor and medical treatment) manufacture and research and development application high efficiency and flexibility are provided.Wide dynamic range:>123dB, survey
Measure speed:It is 41ms when scanning and complete 2 port at 1601 points and calibrating, low trace noise:During 70kHzIFBW,<0.004dBrms,
2 built-in ports or optional 4 port for balancing a survey, it is configured with self calibration and data analysis tool, various frequency choosings
Select.
Although above-mentioned instrument has many advantages in function and accessory configuration, the basic technology in laboratory was studied
Corresponding basic function checking is functioned only as in journey, this quasi-instrument is all very huge generally on volume and weight, can not really fit
Practical application area for project.Because it is mainly using radio-frequency current-voltage (RF-IV) technology, so being vulnerable to
The influence of electromagnetic interference, while foregoing large-scale instrument less stable, this result in signal transmission in bring it is essential
Loss and noise, have influence on measuring accuracy.Not only driving power is inadequate for above-mentioned instrument, and demodulation broadband is relatively low, substantially reduces test
Efficiency, while driving force is poor, frequency sweep cycle is longer, it is difficult to meet the testing requirement of current device response speed.
The content of the invention
The technical problems to be solved by the invention are how to provide that a kind of reference frequency output is wide, frequency hopping speed is fast, phase
The RF passive resonance sensor characteristic solution that noise is low, frequency resolution is high, frequency sweep cycle is high and the response time is short adjusts translation circuit.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of RF passive resonance sensor feature
Demodulate translation circuit, it is characterised in that including：Driving source, power divider and width Phase Receiver unit, the driving source is through power
It is divided into multichannel after distributor and inputs to corresponding module in width Phase Receiver unit, the width Phase Receiver unit is used for by tested letter
Number downconvert to after intermediate-freuqncy signal is exported the signal condition for being sent into rear end and quantify acquisition module, translate the signals into discrete
Time-domain signal supply back-end processing.
Further technical scheme is：The driving source includes scanning and excitation module, the first filtration module and power
Amplification module, the output end of the scanning and excitation module are connected with the input of first filtration module, first filtering
The output end of module is connected with the input of the power amplifier module, the output end of the power amplifier module and the power
The signal input part connection of distributor.
Further technical scheme is：The width Phase Receiver unit includes pre- frequency-selecting filter, the pre- frequency-selective filtering
The input of device is used to input measured signal, and the output end of the pre- frequency-selecting filter and the input of low noise amplifier connect,
The output end of the low noise amplifier and the input of image-reject filter connect, and the output end of image-reject filter is divided into
Two-way, it is connected all the way with being mixed an input of multiplier, the input connection of another way and frequency discriminator, is mixed multiplication
The output end of device and the input of wave detector connect, and the output end of the power divider is divided into two-way, the first via and the mirror
Phase device another input connection, the second tunnel with mixing multiplier local oscillation signal input be connected, the wave detector it is defeated
Go out end to be connected with the input of if bandpas filter, the output end of the if bandpas filter and controllable gain amplifier
One input connection, the output end of the phase discriminator are connected with the input of the second low pass filter, second low pass filtered
The output end of ripple device is connected with another input of the controllable gain amplifier, the output end of the controllable gain amplifier
For the signal output part of the width Phase Receiver unit.
It is using beneficial effect caused by above-mentioned technical proposal：The frequency range of the demodulation translation circuit can reach
3GHz, there is high sweep bandwidth (100MHz), output band is wide, frequency hopping speed is fast, phase noise is low, frequency resolution is high, sweeps
The frequency cycle is high, and the response time is short, can realize in real time, accurately conversion and test.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is the theory diagram that translation circuit is demodulated described in the embodiment of the present invention.
Embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still the present invention can be with
It is different from other manner described here using other to implement, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by following public specific embodiment.
As shown in figure 1, the embodiment of the invention discloses a kind of RF passive resonance sensor characteristic solution to adjust translation circuit, bag
Include：Driving source, power divider and width Phase Receiver unit.The driving source is divided into multichannel after power divider and inputs to width phase
Corresponding module in receiving unit, the width Phase Receiver unit are used to export to measured signal is downconverted into intermediate-freuqncy signal
The signal condition of rear end is sent into afterwards and quantifies acquisition module, is translated the signals into discrete time-domain signal and is supplied back-end processing.
Further, as shown in figure 1, the driving source is put including scanning and excitation module, the first filtration module and power
Big module, the output end of the scanning and excitation module are connected with the input of first filtration module, the first filtering mould
The output end of block is connected with the input of the power amplifier module, the output end of the power amplifier module and the power point
The signal input part connection of orchestration.
Driving source provides measured piece pumping signal, because instrument test measured piece is wirelessly transferred device characteristic and working frequency
Relation, so, signal source need to possess frequency scanning function in Network Analyzer.To ensure the frequency accuracy of test, the conversion
Realized using frequency combining method in circuit internal motivation source.When sweep it is wide be arranged to zero when, output signal is point-frequency signal.The change
Change in circuit, existing capability and configuration flow based on instrument, be designed with the linear frequency sweep driving source based on digit synthesis, test
Source driving signal used in system is generated by its work, the precision and driving force of the module, step value driving instrument
Signal conversion unit, have influence on effective transmission of electromagnetic coupled signal.
The translation circuit includes the wideband power distributor that reference frequency output is 1~3GHz, and swept bandwidth is
100MHz.The power divider scheme power output is more than+4dBm, and phase of output signal noise will be better than -94dBc/Hz
1kHz。
Further, as shown in figure 1, the width Phase Receiver unit includes pre- frequency-selecting filter, the pre- frequency-selecting filter
Input be used to input measured signal, the output end of the pre- frequency-selecting filter and the input of low noise amplifier connect, institute
State the output end of low noise amplifier and the input of image-reject filter connects, the output end of image-reject filter is divided into two
Road, it is connected all the way with being mixed an input of multiplier, the input connection of another way and frequency discriminator, is mixed multiplier
Output end and the input of wave detector connect, the output end of the power divider is divided into two-way, the first via and the phase demodulation
Another input connection of device, the second tunnel are connected with being mixed the local oscillation signal input of multiplier, the output of the wave detector
End is connected with the input of if bandpas filter, the output end of the if bandpas filter and the one of controllable gain amplifier
Individual input connection, the output end of the phase discriminator are connected with the input of the second low pass filter, second LPF
The output end of device is connected with another input of the controllable gain amplifier, and the output end of the controllable gain amplifier is
The signal output part of the width Phase Receiver unit.
In width Phase Receiver unit, measured signal first passes around pre- frequency-selecting filter (PreselectFilter), the filtering
Device is primarily used to suppress the interference of out of band signal and image frequency.Then a low-noise amplifier (LNA), low noise are passed through again
Acoustic amplifier is mainly used to amplify useful signal in the case where not increasing noise as far as possible, because it can provide certain increasing
Benefit, so whole signal conversion section noise coefficient is determined by the noise coefficient of LNA.In low noise
It is bandpass filter (IRFilter) after acoustic amplifier, the wave filter is mainly used to filter out the image frequency of useful signal.Again
Radiofrequency signal is converted to fixed intermediate frequency using an adjustable local oscillator (LO) and a lower mixing multiplier (MIXER).In
By if bandpas filter (IFBPF) and intermediate frequency variable gain amplifier (IFVGA), if bandpas filter is used for frequency signal
Useless middle frequency interference signal is filtered out, variable gain amplifier is used for adjusting the dynamic range of link.By what is measured needed for instrument
Intermediate-freuqncy signal is sent into the signal condition of rear end and quantifies acquisition module, translates the signals into discrete time-domain signal and supplies rear end
Reason.
Translation circuit of the present invention compared with prior art, input port quantity can be improved, changed original single
Frequency sweep mode, it is possible to achieve linear, logarithm, put frequency isotype, minimum frequency sweep cycle reaches a millisecond magnitude, and measuring speed can reach
To musec order, refreshing frequency reaches a millisecond magnitude.Improve frequency input range.Frequency stability is less than 5ppm.Quality because
Element is higher, has -90 °~90 ° of phase measurement section, improves power output, avoid frequency source compared with prior art all
It is to be generated by measuring instruments such as signal generators, they are high to operating environment requirements, bulky, do not apply to outside laboratory
Environment carries out testing research, and the shortcomings of power hungry, this patent reduces volume, reduces power consumption, can be applied to high-intensity magnetic field
Etc. in adverse circumstances, miniaturization, multi-functional feature are realized.
The higher signal of frequency is down-converted to the relatively low intermediate-freuqncy signal of frequency by the translation circuit by low-converter, is kept away
The problem of high frequency signals are likely encountered is exempted from, process signal is much easier on the relatively low intermediate frequency of frequency by contrast.
In radio frequency part, the Q values of pre- frequency-selecting filter and image-reject filter are all higher, after low-converter, due to intermediate frequency
Far below radio frequency, if bandpas filter is much easier in radio frequency part in the useful channel when ratio of selection, and the standard of Q values is more
Easily reach.Frequency band is selected using radio-frequency filter, channel is selected using if bandpas filter, is handling very weak letter
Number when need to provide very high gain, but gain is too high to cause the unstable of system.It is general when distributing so high-gain
Three radio frequency, intermediate frequency and base band parts are respectively configured in total gain.The gain of prime radio frequency part is typically put by low noise
Big device provides, while gain the is provided noise of suppression late-class circuit, it is contemplated that high frequency high-gain it is unstable, and be
The requirement for the linearity of uniting, the gain of LNA typically will not be very big.Intermediate-frequency section realizes that high-gain will relatively easily and stably be matched somebody with somebody
IF AGC control AGC use is closed, increases dynamic range.
Claims (3)
1. a kind of RF passive resonance sensor characteristic solution adjusts translation circuit, it is characterised in that including：Driving source, power divider and
Width Phase Receiver unit, the driving source are divided into multichannel after power divider and input to corresponding module in width Phase Receiver unit,
The width Phase Receiver unit is used for the signal condition that rear end is sent into measured signal is downconverted to after intermediate-freuqncy signal exports
And quantify acquisition module, translate the signals into discrete time-domain signal and supply back-end processing.
2. RF passive resonance sensor characteristic solution as claimed in claim 1 adjusts translation circuit, it is characterised in that：The driving source
Including scanning and excitation module, the first filtration module and power amplifier module, the output end of the scanning and excitation module with it is described
The input connection of first filtration module, the output end of first filtration module connect with the input of the power amplifier module
Connect, the output end of the power amplifier module is connected with the signal input part of the power divider.
3. RF passive resonance sensor characteristic solution as claimed in claim 2 adjusts translation circuit, it is characterised in that：The width connects
Receiving unit includes pre- frequency-selecting filter, and the input of the pre- frequency-selecting filter is used to input measured signal, the pre- frequency-selecting filter
The input of the output end of ripple device and low noise amplifier connects, the output end of the low noise amplifier and image-reject filter
Input connects, and the output end of image-reject filter is divided into two-way, is connected all the way with being mixed an input of multiplier, separately
It is connected all the way with an input of frequency discriminator, is mixed the output end of multiplier and the input of wave detector connects, the power
The output end of distributor is divided into two-way, and the first via is connected with another input of the phase discriminator, the second tunnel and mixing multiplication
The local oscillation signal input connection of device, the output end of the wave detector and the input of if bandpas filter connect, in described
The output end of band-pass filter and controllable gain amplifier input connect, the output end of the phase discriminator and second
The input connection of low pass filter, the output end of second low pass filter and the controllable gain amplifier another
Input connects, and the output end of the controllable gain amplifier is the signal output part of the width Phase Receiver unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711075613.1A CN107800443B (en) | 2017-11-06 | 2017-11-06 | Radio frequency passive resonance sensing characteristic demodulation and conversion circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711075613.1A CN107800443B (en) | 2017-11-06 | 2017-11-06 | Radio frequency passive resonance sensing characteristic demodulation and conversion circuit |
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| Publication Number | Publication Date |
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| CN107800443A true CN107800443A (en) | 2018-03-13 |
| CN107800443B CN107800443B (en) | 2020-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231614A (en) * | 2019-07-05 | 2019-09-13 | 电子科技大学 | Microwave ranging system based on passive frequency conversion |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358894A (en) * | 2008-08-26 | 2009-02-04 | 中北大学 | Traceable calibration method and calibration device for dynamic characteristic of big pressure sensor |
| CN104515907A (en) * | 2013-09-30 | 2015-04-15 | 上海霍莱沃电子系统技术有限公司 | Scattering parameter testing system and implementation method thereof |
-
2017
- 2017-11-06 CN CN201711075613.1A patent/CN107800443B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358894A (en) * | 2008-08-26 | 2009-02-04 | 中北大学 | Traceable calibration method and calibration device for dynamic characteristic of big pressure sensor |
| CN104515907A (en) * | 2013-09-30 | 2015-04-15 | 上海霍莱沃电子系统技术有限公司 | Scattering parameter testing system and implementation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231614A (en) * | 2019-07-05 | 2019-09-13 | 电子科技大学 | Microwave ranging system based on passive frequency conversion |
| CN110231614B (en) * | 2019-07-05 | 2024-01-26 | 电子科技大学 | Microwave ranging system based on passive frequency conversion |
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| CN107800443B (en) | 2020-02-18 |
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