CN104950312A - Zero-IF multi-channel microwave Doppler measurement system - Google Patents
Zero-IF multi-channel microwave Doppler measurement system Download PDFInfo
- Publication number
- CN104950312A CN104950312A CN201410126275.XA CN201410126275A CN104950312A CN 104950312 A CN104950312 A CN 104950312A CN 201410126275 A CN201410126275 A CN 201410126275A CN 104950312 A CN104950312 A CN 104950312A
- Authority
- CN
- China
- Prior art keywords
- microwave
- frequency
- output terminal
- input end
- microwave power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The present invention belongs to a magnetic confinement controlled nuclear fusion plasma microwave diagnostic system and particularly relates to a multi-frequency-point microwave Doppler diagnostic system based on microwave Zero-IF demodulation technology. The system comprises a microwave frequency source, a directional coupler, an adjustable attenuator, a multiplexer, a transmitter and antenna, an amplifier, a filter, a demodulator, a video amplifier and so on. The system has the advantages that a microwave source direction demodulation method is used, the down conversion of microwave to an intermediate frequency signal and then demodulation like a heterodyne system is not needed, thus the structure of a multi-channel microwave Doppler measurement system is simplified, and the system has the advantages of low cost, high time resolution, simple maintenance and short development cycle. The system can measure the plasma rotation velocity and turbulence spectrum of multiple spatial points at the same time, and at the same time the spatial correlation of the spatial points can be obtained. The measurement area of the system is determined by the working frequency of a microwave source, and in a suitable range, through adjusting the output frequency of the microwave source, a measurement area can be changed.
Description
Technical field
The invention belongs to a kind of magnetic confinement fusion plasma microwave diagnostic system, be specifically related to a kind of multi-frequency point microwave Doppler diagnostic system based on microwave Zero-IF demodulator technology.
Background technology
In magnetic confinement fusion experimental study, plasma turbulence and rotation are plasma confinement and the key physical parameter transported in subject study, the radial particle of these parameters and plasma abnormality and thermotransport, momentum-transport, and realize the fusionplasma that high restriction mode runs and have close contacting.According to the feature of magnetic trapped fusion apparatus, Plasma Rotation and turbulent flow have different distribution characteristicss in the different radial positions of plasma confinement region, and the evolution time scale of these features is very little, reach a millisecond magnitude, therefore high time-space resolution ground is measured is important research focus and the target of international fusion all the time.
In this research field, three kinds of methods such as microwave Doppler reflection, electrostatic probe and charge exchange recombination spectrum are mainly contained to the measurement of these two parameters at present.Wherein probe must be extend into plasma by the measurement of electrostatic probe, could realize measuring, but stretch into probe and can change local plasmon body characteristics, high-temperature plasma is easy to burn probe in addition, probe and Plasma Interaction produce the impurity effect plasma done and run, threaten equipment safety time serious, this makes this diagnosis can only at the edge plasma area measure of lower temperature, and space covers very limited.The diagnosis of charge exchange recombination spectral measurement is a kind of active diagnosing depending on high energy eutral particle beam, high energy eutral particle beam involves great expense, this diagnosis has higher requirements to diagnosis beam quality, high energy electron in measurement environment also will affect the spectral measurement of this diagnosis, and diagnosis is arranged and the geometry of neutral beam is provided with substantial connection, could realize the measurement of pole to rotational speed; Secondly, the method time resolution is poor, is difficult to quantitative description local density fluctuation level, and make this diagnostic system complicated, involve great expense, system stability is limited.Microwave Doppler reflection utilizes microwave turbulent scattering in the plasma to measure rotational speed and the turbulence intensity of specific wave vector, and it can not affect plasma Local Characteristic.By changing microwave frequency and measured angular, the measurement of zones of different and different wave vector can be realized, be a kind of Active measuring means not relying on auxiliary heating condition, be applicable to the measurement of edge plasma to all regions of core.In order to measure rotational speed direction, microwave system needs to carry out quadrature demodulation to the signal of returning from plasma diffusion.And distribution measuring will be realized, need the different radial position scattering in the plasma of multifrequency microwave signal, to measure the Doppler signal of zones of different.Can by the restriction of auto levelizer diagnostic window if adopt many cover microwave systems to measure simultaneously, the repeatedly frequency conversion of heterodyne system makes system become complicated, and difficult in maintenance, the development cost of system significantly raises.Usually a wide-band microwave source is adopted to come frequency sweep and heterodyne measurement Doppler signal at present in the world, but this stepping frequency sweeping method makes the distribution of measurement not be synchronization, a frequency sweep cycle time has reached a few tens of milliseconds, makes time resolution become very poor, causes difficulty to physical analysis.
Summary of the invention
The object of this invention is to provide a kind of zero intermediate frequency multiple tracks microwave Doppler measuring system, this system can measure Plasma Rotation speed and the spectrum of turbulence of multiple spatial point simultaneously, their spatial coherence can be obtained, simultaneity factor also has that cost is low, time resolution is high, maintenance is simple, the advantages such as the lead time is short.
The present invention is achieved in that the multiple tracks Doppler measurement system based on Zero-IF demodulator, and it comprises Microwave Frequency Source, directional coupler, adjustable attenuator, multiplexer, transmitting terminal rejection filter, emitting antenna, receiving antenna, plasma cutoff layer, receiving end rejection filter, wide-band microwave power amplifier, microwave power divider, bandpass filter, adjustable gain microwave power amplifier, microwave quadrature demodulator, low-pass filter, the video amplifier, wherein, Microwave Frequency Source, directional coupler, adjustable attenuator, multiplexer, transmitting terminal rejection filter, emitting antenna forms microwave multi-path frequency emission coefficient, the output terminal of Microwave Frequency Source is connected with the input end of directional coupler, the output terminal of directional coupler is connected with the input end of adjustable attenuator, the output terminal of adjustable attenuator is connected with the input end of multiplexer, the output terminal of multiplexer is connected with the input end of transmitting terminal rejection filter, the output terminal of transmitting terminal rejection filter is connected with the input end of emitting antenna, and microwave is launched to plasma cutoff layer by emitting antenna, receiving antenna, receiving end rejection filter, wide-band microwave power amplifier, microwave power divider, bandpass filter, adjustable gain microwave power amplifier, microwave quadrature demodulator, low-pass filter, the video amplifier forms multichannel microwave receiving system, the microwave signal reflected from plasma cutoff layer is received antenna reception, the output terminal of receiving antenna is connected with the input end of receiving end rejection filter, the output terminal of receiving end rejection filter is connected with the input end of wide-band microwave power amplifier, the output terminal of wide-band microwave power amplifier is connected with the input end of microwave power divider, the output terminal of microwave power divider is connected with the input end of bandpass filter, the output terminal of bandpass filter is connected with the rf inputs of microwave quadrature demodulator, the coupled output of directional coupler is connected with the input end of adjustable gain microwave power amplifier, the output terminal of adjustable gain microwave power amplifier is connected with the local oscillator input end of microwave quadrature demodulator, directional coupler and adjustable gain microwave power amplifier constitute the local oscillator loop of microwave, their frequency of operation is consistent with the frequency of microwave source, number of channels is identical with the quantity of microwave source, the output power of adjustable gain microwave power amplifier is consistent with the best local oscillation power of microwave quadrature demodulator, the in-phase output end of microwave quadrature demodulator is connected from the input end of different low-pass filters respectively with orthogonal output terminal, the output terminal of low-pass filter is connected with the input end of the video amplifier, the output terminal restituted signal of the video amplifier gives Data collecting and analysis system.
Described Microwave Frequency Source is multiple independently microwave sources, and its frequency of operation is different, and it is determined by the measurement space position required, the power requirement of Microwave Frequency Source is greater than 20dBm.
Described microwave power divider is a wide band microwave power divider, and its frequency of operation is determined by the frequency of Microwave Frequency Source, requires that the operating frequency range of microwave power divider covers the frequency of operation of all Microwave Frequency Sources.
The frequency of operation of described bandpass filter and the frequency of operation one_to_one corresponding of Microwave Frequency Source, be respectively used to required frequency be extracted separately from receiving system, carry out orthogonal phase demodulation to microwave quadrature demodulator.
The frequency deviation size that described low-pass filter and the frequency of operation of the video amplifier are produced by survey frequency resolution and the Doppler shift of system requirements determines, is usually less than 5MHz.
Advantage of the present invention is, it adopts microwave source Direct demodulation, does not need microwave to be downconverted to intermediate-freuqncy signal demodulation again as heterodyne system, multiple tracks microwave Doppler measuring system structure is simplified, have that cost is low, time resolution is high, maintenance is simple, the advantages such as the lead time is short.This system can measure Plasma Rotation speed and the spectrum of turbulence of multiple spatial point simultaneously, can also obtain their spatial coherence simultaneously.The measured zone of system determines by the frequency of operation of microwave source, in proper range, by regulating the output frequency of microwave source, can also change measured zone.There is rejection filter in system, high power electronic cyclotron wave signal can be absorbed, can each element of protection system and the interference prevented Doppler frequency spectrum to be measured well.Adjustable microwave attenuator in Microwave emission passage can enable the power of each transmission frequency need to regulate according to measurement, makes the applicability that the measured zone of system is higher.Select low-pass filter and the video amplifier of suitable frequency and bandwidth, higher time resolution can be obtained.This system, except can be used in turbulent flow and the rotational speed analysis of plasma, can also be used for measurement and the analysis of other field, as astrophysical plasma, and the microwave Doppler radar monitoring etc. of moving target.
Accompanying drawing explanation
Fig. 1 is zero intermediate frequency multiple tracks Doppler measurement system schematic diagram provided by the present invention.
In figure: 1 Microwave Frequency Source, 2 directional couplers, 3 adjustable attenuators, 4 multiplexers, 5 transmitting terminal rejection filters, 6 emitting antennas, 7 receiving antennas, 8 plasma cutoff layers, 9 receiving end rejection filters, 10 wide-band microwave power amplifiers, 11 microwave power dividers, 12 bandpass filter, 13 adjustable gain microwave power amplifiers, 14 microwave quadrature demodulators, 15 low-pass filters, 16 video amplifiers.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail:
The present invention is directed to plasma internal rotating and the restriction of the condition suffered by turbulent flow distribution measuring, and the problem such as the time resolution of traditional microwave heterodyne scanning system is poor, difficult in maintenance, a kind of multiple tracks microwave Doppler radiodiagnosis system based on Zero-IF demodulator technology is provided.
Based on a multiple tracks microwave Doppler measuring system for Zero-IF demodulator, this system comprises Microwave Frequency Source, directional coupler, adjustable attenuator, multiplexer, transmitting terminal rejection filter, emitting antenna, receiving antenna, plasma cutoff layer, receiving end rejection filter, wide-band microwave power amplifier, microwave power divider, bandpass filter, adjustable gain microwave power amplifier, microwave quadrature demodulator, low-pass filter, the video amplifier etc.The output terminal of Microwave Frequency Source is connected with directional coupler and adjustable attenuator successively, the output terminal of adjustable attenuator is connected with the input end of multiplexer, the output terminal of multiplexer is connected with rejection filter and emitting antenna successively, the output terminal of receiving antenna is connected with rejection filter and broadband power divider successively, the output terminal of broadband power divider is connected with bandpass filter and microwave orthogonal mixer successively, the coupled output of directional coupler is connected with the local oscillator end of adjustable gain microwave power amplifier and microwave orthogonal mixer successively, the output terminal of microwave orthogonal mixer successively with low-pass filter, the video amplifier is connected with data collection and transmission.
The microwave signal that described Microwave Frequency Source exports carries out power adjustments through directional coupler and adjustable attenuator, power combing is carried out in multiplexer, after multichannel microwave closes road, to plasma emission microwave power signal through transmitting terminal rejection filter and emitting antenna while.From the microwave signal that plasma cutoff layer reflects, carry plasma turbulence and rotation information, the i.e. strength of turbulence of plasma and the Doppler shift of rotation generation, received antenna receives, then through receiving end rejection filter, in wide-band microwave power amplifier, carry out power amplification, the microwave signal after amplification carries out power division in microwave power divider.Then carry out frequency-selecting to bandpass filter, be sent in the microwave quadrature demodulator of next stage and carry out demodulation.The oscillating driving signal of microwave quadrature demodulator is produced by the coupled output of directional coupler, the coupled output signal of directional coupler through adjustable gain microwave power amplifier, by each microwave signal power amplification to enough driving microwave quadrature demodulator.Microwave quadrature demodulator directly carries out demodulation in microwave frequency, export the quadrature measuring signal of generation 0 degree and 90 degree phase place, Data collecting and analysis system is exported to through low-pass filter and video amplifier, this signal contains the information from plasma turbulence, obtain the strength signal of Doppler shift and disturbance through data analysis, and then obtain rotational speed distribution and turbulent flow distribution.
As shown in Figure 1, a kind of multiple tracks Doppler measurement system based on Zero-IF demodulator provided by the present invention, this system comprises Microwave Frequency Source 1, directional coupler 2, adjustable attenuator 3, multiplexer 4, transmitting terminal rejection filter 5, emitting antenna 6, receiving antenna 7, plasma cutoff layer 8, receiving end rejection filter 9, wide-band microwave power amplifier 10, microwave power divider 11, bandpass filter 12, adjustable gain microwave power amplifier 13, microwave quadrature demodulator 14, low-pass filter 15, the video amplifier 16.
Microwave Frequency Source 1, directional coupler 2, adjustable attenuator 3, multiplexer 4, transmitting terminal rejection filter 5, emitting antenna 6 form microwave multi-path frequency emission coefficient, the number of channels measured is the quantity of Microwave Frequency Source, and the input end quantity of multiplexer is identical with the quantity of Microwave Frequency Source.
The output terminal of Microwave Frequency Source 1 is connected with the input end of directional coupler 2, the output terminal of directional coupler 2 is connected with the input end of adjustable attenuator 3, the output terminal of adjustable attenuator 3 is connected with the input end of multiplexer 4, the output terminal of multiplexer 4 is connected with the input end of transmitting terminal rejection filter 5, the output terminal of transmitting terminal rejection filter 5 is connected with the input end of emitting antenna 6, and microwave is launched to plasma cutoff layer 8 by emitting antenna 6.
Receiving antenna 7, receiving end rejection filter 9, wide-band microwave power amplifier 10, microwave power divider 11, bandpass filter 12, adjustable gain microwave power amplifier 13, microwave quadrature demodulator 14, low-pass filter 15, the video amplifier 16 form multichannel microwave receiving system.The passage amount received is identical with the quantity of Microwave Frequency Source.
The microwave signal reflected from plasma cutoff layer 8 is received antenna 7 and receives, the output terminal of receiving antenna is connected with the input end of receiving end rejection filter 9, the output terminal of receiving end rejection filter 9 is connected with the input end of wide-band microwave power amplifier 10, the output terminal of wide-band microwave power amplifier 10 is connected with the input end of microwave power divider 11, the output terminal of microwave power divider 11 is connected with the input end of bandpass filter 12, and the output terminal of bandpass filter 12 is connected with the rf inputs of microwave quadrature demodulator 14.
The coupled output of directional coupler 2 is connected with the input end of adjustable gain microwave power amplifier 13, and the output terminal of adjustable gain microwave power amplifier 13 is connected with the local oscillator input end of microwave quadrature demodulator 14.Directional coupler 2 and adjustable gain microwave power amplifier 13 constitute the local oscillator loop of microwave, their frequency of operation is consistent with the frequency of microwave source, number of channels is identical with the quantity of microwave source, and the output power of adjustable gain microwave power amplifier 13 is consistent with the specified local oscillation power of microwave quadrature demodulator 14.Here the specified local oscillation power of the quadrature demodulator of our employing is+17dBm.
The in-phase output end of microwave quadrature demodulator 14 is connected from the input end of different low-pass filters 15 respectively with orthogonal output terminal, the output terminal of low-pass filter 15 is connected with the input end of the video amplifier 16, the output terminal restituted signal of the video amplifier 16 gives Data collecting and analysis system, obtains the doppler shifted signal measured.
Described Microwave Frequency Source 1 is multiple independently microwave sources, its frequency of operation is different, and it is determined by measurement space position, and the power requirement of Microwave Frequency Source is being greater than 20dBm, otherwise need to increase power amplifier, to obtain sufficiently high Microwave emission power at transmitting terminal.The space number of channels of the system of the number decision of microwave source, consider the efficiency of power divider, the multiple with 2 is the best, and accompanying drawing 1 is for four tunnel measuring systems here.
Described multiplexer is the power combiner of a low insertion loss.Multiplexer can reduce insertion loss, improves emissive power.When for 4 tunnel system, its insertion loss can accomplish below 1.5dB.
Described microwave power divider 11 is a wide band microwave power divider, and its frequency of operation is determined by the frequency of Microwave Frequency Source 1, requires that the operating frequency range of microwave power divider 11 covers the frequency of operation of all Microwave Frequency Sources 1.
The frequency of operation of described bandpass filter 12 and the frequency of operation one_to_one corresponding of Microwave Frequency Source 1, be respectively used to required frequency be extracted separately from receiving system, carry out orthogonal phase demodulation to microwave quadrature demodulator 14.
The frequency deviation size that described low-pass filter 15 and the frequency of operation of the video amplifier 16 are produced by survey frequency resolution and the Doppler shift of system determines, is usually less than 5MHz.
The principle of work of a kind of multiple tracks Doppler measurement system based on Zero-IF demodulator tune provided by the present invention is described in detail below in conjunction with accompanying drawing 1:
The microwave signal that Microwave Frequency Source 1 exports carries out power adjustments through directional coupler 2 and adjustable attenuator 3, in multiplexer 4, carry out power combing, launches after microwave closes road through rejection filter 6 and emitting antenna 6 to plasma 8 simultaneously.From the microwave signal that plasma 8 cutoff layer reflects, carry plasma turbulence and rotation information, received antenna 7 receives, then through rejection filter 9, in wide-band microwave power amplifier 10, carry out power amplification, the microwave signal after amplification carries out power division in microwave power divider 11.Carry out frequency-selecting then to bandpass filter 12, be sent in the microwave quadrature demodulator 14 of next stage and carry out demodulation.Microwave power divider 11 has higher isolation, reaches more than 20dB, Binding protein bandpass filter 12 acting in conjunction, can prevent the measuring-signal between different passage from interfering with each other.
In addition, rejection filter 5 and 9 is respectively used to the high power cyclotron wave power absorption of transmitting terminal and receiving end, prevents from causing system failure in this power back off to microwave system.Multiplexer 4 has higher isolation, prevents incident wave and reflection wave from mutually disturbing.
The local oscillation signal of microwave quadrature demodulator 14 is from the coupled output of directional coupler 2, through adjustable gain microwave power amplifier 13, the power amplification coupling of each Microwave Frequency Source come, to+17dBm, makes microwave quadrature demodulator 14 reach optimum Working.
Microwave quadrature demodulator 14 directly carries out demodulation in microwave frequency, the principle of this detuner is wherein carried out 90 degree of phase shifts together after dividing reference signal merit, then down coversion mixing is carried out with the microwave signal measured respectively, the phase differential of such frequency conversion signal difference 90 degree out.Because this technology directly carries out demodulation phase demodulation on microwave frequency band, do not need by system downconversion to intermediate-freuqncy signal just demodulation, therefore system obtains very large simplification.
The output terminal of microwave quadrature demodulator 14 exports 0 degree and 90 degree of phase signals measuring disturbing signal, Data collecting and analysis system is given through low-pass filter 15 and the video amplifier 16 output terminal restituted signal, obtain the strength signal of doppler shifted signal and the disturbance measured, carry out analyzing plasma pole to rotational speed and turbulence intensity distribution.
With enforcement, the present invention is explained in detail by reference to the accompanying drawings above, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, can also make various change under the prerequisite not departing from present inventive concept.The content be not described in detail in the present invention all can adopt prior art.
Claims (5)
1. based on the multiple tracks Doppler measurement system of Zero-IF demodulator, it is characterized in that: it comprises Microwave Frequency Source (1), directional coupler (2), adjustable attenuator (3), multiplexer (4), transmitting terminal rejection filter (5), emitting antenna (6), receiving antenna (7), plasma cutoff layer (8), receiving end rejection filter (9), wide-band microwave power amplifier (10), microwave power divider (11), bandpass filter (12), adjustable gain microwave power amplifier (13), microwave quadrature demodulator (14), low-pass filter (15), the video amplifier (16), wherein, Microwave Frequency Source (1), directional coupler (2), adjustable attenuator (3), multiplexer (4), transmitting terminal rejection filter (5), emitting antenna (6) forms microwave multi-path frequency emission coefficient, the output terminal of Microwave Frequency Source (1) is connected with the input end of directional coupler (2), the output terminal of directional coupler (2) is connected with the input end of adjustable attenuator (3), the output terminal of adjustable attenuator (3) is connected with the input end of multiplexer (4), the output terminal of multiplexer (4) is connected with the input end of transmitting terminal rejection filter (5), the output terminal of transmitting terminal rejection filter (5) is connected with the input end of emitting antenna (6), microwave is launched to plasma cutoff layer (8) by emitting antenna (6), receiving antenna (7), receiving end rejection filter (9), wide-band microwave power amplifier (10), microwave power divider (11), bandpass filter (12), adjustable gain microwave power amplifier (13), microwave quadrature demodulator (14), low-pass filter (15), the video amplifier (16) forms multichannel microwave receiving system, the microwave signal reflected from plasma cutoff layer (8) is received antenna (7) reception, the output terminal of receiving antenna is connected with the input end of receiving end rejection filter (9), the output terminal of receiving end rejection filter (9) is connected with the input end of wide-band microwave power amplifier (10), the output terminal of wide-band microwave power amplifier (10) is connected with the input end of microwave power divider (11), the output terminal of microwave power divider (11) is connected with the input end of bandpass filter (12), the output terminal of bandpass filter (12) is connected with the rf inputs of microwave quadrature demodulator (14), the coupled output of directional coupler (2) is connected with the input end of adjustable gain microwave power amplifier (13), the output terminal of adjustable gain microwave power amplifier (13) is connected with the local oscillator input end of microwave quadrature demodulator (14), directional coupler (2) and adjustable gain microwave power amplifier (13) constitute the local oscillator loop of microwave, their frequency of operation is consistent with the frequency of microwave source, number of channels is identical with the quantity of microwave source, the output power of adjustable gain microwave power amplifier (13) is consistent with the specified local oscillation power of microwave quadrature demodulator (14), the input end of the low-pass filter (15) that the in-phase output end of microwave quadrature demodulator (14) is different from two respectively with orthogonal output terminal is connected, the output terminal of low-pass filter (15) is connected with the input end of the video amplifier (16), the output terminal restituted signal of the video amplifier (16) gives Data collecting and analysis system.
2. as claimed in claim 1 based on the multiple tracks Doppler measurement system of Zero-IF demodulator, it is characterized in that: described Microwave Frequency Source (1) is multiple independently microwave source, its frequency of operation is different, and it is determined by the measurement space position needed, and the power requirement of Microwave Frequency Source is greater than 20dBm.
3. as claimed in claim 1 based on the multiple tracks Doppler measurement system of Zero-IF demodulator, it is characterized in that: described microwave power divider (11) is a wide band microwave power divider, its frequency of operation is determined by the frequency of Microwave Frequency Source (1), requires that the operating frequency range of microwave power divider (11) covers the frequency of operation of all Microwave Frequency Sources (1).
4. as claimed in claim 1 based on the multiple tracks Doppler measurement system of Zero-IF demodulator, it is characterized in that: the frequency of operation of described bandpass filter (12) and the frequency of operation one_to_one corresponding of Microwave Frequency Source (1), be respectively used to from receiving system, required frequency be extracted separately carry out orthogonal phase demodulation.
5. as claimed in claim 1 based on the multiple tracks Doppler measurement system of Zero-IF demodulator, it is characterized in that: the frequency deviation size that described low-pass filter (15) and the frequency of operation of the video amplifier (16) are produced by survey frequency resolution and the Doppler shift of system requirements determines, is usually less than 5MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410126275.XA CN104950312B (en) | 2014-03-31 | 2014-03-31 | Zero intermediate frequency multiple tracks microwave Doppler measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410126275.XA CN104950312B (en) | 2014-03-31 | 2014-03-31 | Zero intermediate frequency multiple tracks microwave Doppler measuring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104950312A true CN104950312A (en) | 2015-09-30 |
| CN104950312B CN104950312B (en) | 2018-07-27 |
Family
ID=54165109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410126275.XA Active CN104950312B (en) | 2014-03-31 | 2014-03-31 | Zero intermediate frequency multiple tracks microwave Doppler measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104950312B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111273276A (en) * | 2018-12-05 | 2020-06-12 | 核工业西南物理研究院 | Multichannel microwave Doppler reflectometer based on self-excited oscillation microwave source |
| WO2021022644A1 (en) * | 2019-08-05 | 2021-02-11 | 深圳迈睿智能科技有限公司 | Anti-interference microwave detection module and anti-interference method |
| CN112566348A (en) * | 2020-12-01 | 2021-03-26 | 大连理工大学 | Dual-band multi-beam microwave diagnosis system for electron density disturbance localized measurement |
| CN114624256A (en) * | 2022-03-31 | 2022-06-14 | 核工业西南物理研究院 | Three-dimensional microwave reflection system and method for measuring instability modulus of magnetofluid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1536527A1 (en) * | 1988-01-18 | 1990-01-15 | Предприятие П/Я А-7797 | Microwave reflectometer for diagnosis of plasma |
| CN203799016U (en) * | 2014-03-31 | 2014-08-27 | 核工业西南物理研究院 | Zero-intermediate frequency multichannel microwave Doppler measurement system |
-
2014
- 2014-03-31 CN CN201410126275.XA patent/CN104950312B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1536527A1 (en) * | 1988-01-18 | 1990-01-15 | Предприятие П/Я А-7797 | Microwave reflectometer for diagnosis of plasma |
| CN203799016U (en) * | 2014-03-31 | 2014-08-27 | 核工业西南物理研究院 | Zero-intermediate frequency multichannel microwave Doppler measurement system |
Non-Patent Citations (4)
| Title |
|---|
| 严建成: "中国环流器二号A装置(HL-2A)工程研制", 《核聚变与等离子体物理》 * |
| 扬州军 等: "HL-2A装置微波反射仪的研制", 《核聚变与等离子体物理》 * |
| 扬州军: "《https://vpn.hw.sipo/proxy*32061851/Thesis_D044570.aspx》", 3 November 2008 * |
| 符宏军: "HL-2A扫频微波反射系统设计", 《科学技术与工程》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111273276A (en) * | 2018-12-05 | 2020-06-12 | 核工业西南物理研究院 | Multichannel microwave Doppler reflectometer based on self-excited oscillation microwave source |
| WO2021022644A1 (en) * | 2019-08-05 | 2021-02-11 | 深圳迈睿智能科技有限公司 | Anti-interference microwave detection module and anti-interference method |
| CN112566348A (en) * | 2020-12-01 | 2021-03-26 | 大连理工大学 | Dual-band multi-beam microwave diagnosis system for electron density disturbance localized measurement |
| CN114624256A (en) * | 2022-03-31 | 2022-06-14 | 核工业西南物理研究院 | Three-dimensional microwave reflection system and method for measuring instability modulus of magnetofluid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104950312B (en) | 2018-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102545935B (en) | Calibration receiving device and calibration receiving method of radio frequency simulation system | |
| CN105101599B (en) | A kind of polarization ECE diagnostic systems for measuring plasma current distribution | |
| CN203799016U (en) | Zero-intermediate frequency multichannel microwave Doppler measurement system | |
| CN102243304A (en) | Foundation-based atmosphere profile microwave detector | |
| CN104950312A (en) | Zero-IF multi-channel microwave Doppler measurement system | |
| CN109327190A (en) | Multi-quantum bit regulation and control reading device | |
| CN106291133A (en) | A kind of UHF waveband broadband DBF array antenna method of testing | |
| Aguiam et al. | Implementation of the new multichannel X-mode edge density profile reflectometer for the ICRF antenna on ASDEX Upgrade | |
| CN115032611B (en) | Distributed terahertz radar detection system and method based on photon technology | |
| CN111273276A (en) | Multichannel microwave Doppler reflectometer based on self-excited oscillation microwave source | |
| CN109257105A (en) | Broadband signal method of reseptance, device and EW receiver | |
| Bin et al. | Advances in the FTU collective Thomson scattering system | |
| CN103543349B (en) | Wideband multi-beam microwave source associated reflections based on VCO modulation measures system | |
| CN104950171B (en) | A kind of multiple tracks wide-band microwave radiometer with self calibrating function | |
| Xiang et al. | Development of an ordinary mode multi-channel correlation reflectometer on EAST tokamak | |
| CN106019641A (en) | Method for generating polarization orthogonal dual-wavelength optical signal with large tuning range for frequency interval, and device thereof | |
| CN102571218A (en) | Whole-satellite wireless testing method for a satellite-borne rotatable radio-frequency emission system | |
| CN205333746U (en) | Frequency sweep measurement system based on diversity notion | |
| CN203859921U (en) | Polarized electron cyclotron emission (ECE) diagnosis system for measuring plasma current distribution | |
| CN104266992A (en) | Device and method for distributing local oscillation reference signal power of terahertz heterodyne array receiver | |
| CN210155324U (en) | Multichannel microwave Doppler reflectometer based on self-excited oscillation microwave source | |
| CN109406888A (en) | A kind of active phase array antenna transmitting pattern test method and system | |
| CN207283538U (en) | A kind of millimeter wave multichannel transmitting-receiving system | |
| CN109270375A (en) | Frequency discrimination type KIDs detector phase noise measurement circuit system and measurement method | |
| CN104569584B (en) | Ultra wide band frequency sweep microwave radiometer based on frequency doubling technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |