CN209690496U - Millimeter wave imaging system based on vector network analyzer - Google Patents
Millimeter wave imaging system based on vector network analyzer Download PDFInfo
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- CN209690496U CN209690496U CN201920291358.2U CN201920291358U CN209690496U CN 209690496 U CN209690496 U CN 209690496U CN 201920291358 U CN201920291358 U CN 201920291358U CN 209690496 U CN209690496 U CN 209690496U
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- network analyzer
- millimeter wave
- vector network
- source vector
- imaging system
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Abstract
Millimeter wave imaging system of the utility model based on vector network analyzer, including double source vector network analyzer and the millimeter wave transceiving front end being used cooperatively with double source vector network analyzer；Millimeter wave front end of emission emits millimeter-wave signal, is received after target reflects by millimeter wave receiving front-end, and received intermediate-freuqncy signal enters double source vector network analyzer and carries out IQ demodulation to realize to target imaging.
Description
Technical field
The utility model relates to millimeter wave equipment and its using technical field, specifically, it shows one kind based on vector network
The millimeter wave imaging system of analyzer.
Background technique
Short distance millimeter wave imaging system has good penetration capacity and suitable to many optical band barriers because of it
Resolution ratio, be more and more widely used in fields such as personnel's safety check, navigation for aircraft landing.
Compared with infrared ray, millimetre wavelength is longer, has stronger diffracting power；With centimeter wave or more low-frequency band phase
Than mm-wave imaging can provide suitable resolution ratio, suitable for concealed weapons under detection human body clothing.
By coherent and frequency-swept, the Doppler frequency shift of available movement physics, so as to realize that object tests the speed.
By the IQ demodulation to coherent signal, available orientation and amplitude information can obtain the 3-D image of object with inverting.
Therefore it to realize mm-wave imaging, at least need a coherent and the two-way frequency source of frequency sweep can be synchronized, one
For carrying out the phase reference signal of IQ demodulation, the signal processing module of a data acquisition and IQ demodulation, milli with echo-signal
Decimetric emission receiving front-end.Traditional millimeter wave imaging system component is various, and connection is complicated, increases operation error bring wind
Danger.
It a kind of is solved the above problems based on the millimeter wave imaging system of vector network analyzer therefore, it is necessary to provide.
Utility model content
The purpose of the utility model is to provide a kind of millimeter wave imaging systems based on vector network analyzer.
Technical solution is as follows:
A kind of millimeter wave imaging system based on vector network analyzer, including double source vector network analyzer, Yi Jiyu
The millimeter wave transceiving front end that double source vector network analyzer is used cooperatively；
Millimeter wave front end of emission emits millimeter-wave signal, is received after target reflects by millimeter wave receiving front-end, received
Intermediate-freuqncy signal enters double source vector network analyzer and carries out IQ demodulation to realize to target imaging.
Further, before a source of double source vector network analyzer is input to millimeter wave transmitting as rf excitation signal
End, millimeter wave front end of emission by three and varactor doubler forms, octonary may be implemented in total.
Further, the frequency of double source vector network analyzer can frequency multiplication to 300GHz.
Further, another source of double source vector network analyzer is believed as the local oscillator excitation of millimeter wave receiving front-end
Number, signal enters sub-harmonic mixer after two varactor doublers, to realize millimeter wave superheterodyne reception.
Further, the receiver port of received intermediate-freuqncy signal access double source vector network analyzer, passes through network point
Data acquisition function inside analyzer acquires intermediate-freuqncy signal；Two frequency sources of double source vector network analyzer are coherents, interior
Portion directly can carry out IQ demodulation with received intermediate-freuqncy signal with phase reference.
Compared with prior art, the utility model uses double source vector network analyzer as millimeter wave transceiving front end
Driving source, the characteristic being concerned with using two sources of double source vector network analyzer are straight receiving intermediate frequency signal access Network Analyzer
Tap into row IQ demodulation；A double source vector network analyzer is only needed, a millimeter wave transceiving front end simplifies system structure, takes
It builds rapidly；Double source vector network analyzer is capable of providing higher driving frequency, reduces millimeter wave transceiving front end frequency multiplier
Quantity；The receiving and transmitting front end that frequency is up to 300GHz provides broader swept bandwidth, improves image-forming range resolution ratio.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
Embodiment:
Referring to Fig. 1, the present embodiment shows a kind of millimeter wave imaging system based on vector network analyzer, including double source
Vector network analyzer and the millimeter wave transceiving front end being used cooperatively with double source vector network analyzer；
Millimeter wave front end of emission emits millimeter-wave signal, is received after target reflects by millimeter wave receiving front-end, received
Intermediate-freuqncy signal enters double source vector network analyzer and carries out IQ demodulation to realize to target imaging.
One source of double source vector network analyzer is input to millimeter wave front end of emission, millimeter wave as rf excitation signal
Front end of emission is by three and varactor doubler forms, and octonary may be implemented in total.
The frequency of double source vector network analyzer can frequency multiplication to 300GHz.
Local oscillator excitation signal of another source of double source vector network analyzer as millimeter wave receiving front-end, signal pass through
Enter sub-harmonic mixer after two varactor doublers, to realize millimeter wave superheterodyne reception.
The receiver port of received intermediate-freuqncy signal access double source vector network analyzer, inside Network Analyzer
Data acquisition function acquires intermediate-freuqncy signal；Two frequency sources of double source vector network analyzer are coherents, and inside has phase
With reference to can directly with received intermediate-freuqncy signal carry out IQ demodulation.
Compared with prior art, the utility model uses double source vector network analyzer as millimeter wave transceiving front end
Driving source, the characteristic being concerned with using two sources of double source vector network analyzer are straight receiving intermediate frequency signal access Network Analyzer
Tap into row IQ demodulation；A double source vector network analyzer is only needed, a millimeter wave transceiving front end simplifies system structure, takes
It builds rapidly；Double source vector network analyzer is capable of providing higher driving frequency, reduces millimeter wave transceiving front end frequency multiplier
Quantity；The receiving and transmitting front end that frequency is up to 300GHz provides broader swept bandwidth, improves image-forming range resolution ratio.
Above-described is only some embodiments of the utility model.For those of ordinary skill in the art,
Without departing from the concept of the present invention, various modifications and improvements can be made, these belong to practical
Novel protection scope.
Claims (5)
1. a kind of millimeter wave imaging system based on vector network analyzer, it is characterised in that: including double source vector network analysis
Instrument and the millimeter wave transceiving front end being used cooperatively with double source vector network analyzer；
Millimeter wave front end of emission emits millimeter-wave signal, is received after target reflects by millimeter wave receiving front-end, received intermediate frequency
Signal enters double source vector network analyzer and carries out IQ demodulation to realize to target imaging.
2. a kind of millimeter wave imaging system based on vector network analyzer according to claim 1, it is characterised in that: double
One source of source vector network analyzer is input to millimeter wave front end of emission as rf excitation signal, millimeter wave front end of emission by
Three and varactor doubler form, and octonary may be implemented in total.
3. a kind of millimeter wave imaging system based on vector network analyzer according to claim 2, it is characterised in that: double
The frequency of source vector network analyzer can frequency multiplication to 300GHz.
4. a kind of millimeter wave imaging system based on vector network analyzer according to claim 3, it is characterised in that: double
Local oscillator excitation signal of another source of source vector network analyzer as millimeter wave receiving front-end, signal pass through two two frequencys multiplication
Enter sub-harmonic mixer after device, to realize millimeter wave superheterodyne reception.
5. a kind of millimeter wave imaging system based on vector network analyzer according to claim 4, it is characterised in that: connect
The receiver port of the intermediate-freuqncy signal access double source vector network analyzer of receipts, acquires function by the data inside Network Analyzer
Intermediate-freuqncy signal can be acquired；Two frequency sources of double source vector network analyzer are coherents, and inside can be straight with phase reference
It connects and carries out IQ demodulation with received intermediate-freuqncy signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920291358.2U CN209690496U (en) | 2019-03-07 | 2019-03-07 | Millimeter wave imaging system based on vector network analyzer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920291358.2U CN209690496U (en) | 2019-03-07 | 2019-03-07 | Millimeter wave imaging system based on vector network analyzer |
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| CN209690496U true CN209690496U (en) | 2019-11-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935756A (en) * | 2022-04-06 | 2022-08-23 | 电子科技大学 | Near-field millimeter wave synthetic aperture scanning imaging system and imaging method based on vector network analyzer |
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2019
- 2019-03-07 CN CN201920291358.2U patent/CN209690496U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935756A (en) * | 2022-04-06 | 2022-08-23 | 电子科技大学 | Near-field millimeter wave synthetic aperture scanning imaging system and imaging method based on vector network analyzer |
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