CN104569584B - Ultra wide band frequency sweep microwave radiometer based on frequency doubling technology - Google Patents
Ultra wide band frequency sweep microwave radiometer based on frequency doubling technology Download PDFInfo
- Publication number
- CN104569584B CN104569584B CN201310466995.6A CN201310466995A CN104569584B CN 104569584 B CN104569584 B CN 104569584B CN 201310466995 A CN201310466995 A CN 201310466995A CN 104569584 B CN104569584 B CN 104569584B
- Authority
- CN
- China
- Prior art keywords
- group
- frequency
- power
- output
- output end
- 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.)
- Active
Links
Landscapes
- Plasma Technology (AREA)
Abstract
The invention belongs to a kind of ultra wide band frequency sweep microwave radiometer based on frequency doubling technology.It includes AWG, broadband VCO sources, AWG successively with broadband VCO sources, isolator, the input connection of power divider, first three output end of power divider successively with frequency multiplier group, the LO inputs connection of frequency mixer group, 4th output end and wave detector of power divider, oscillograph is connected, reception antenna input receives the signal from plasma resonance, reception antenna output end successively with bandstop filter, waveguide power distributes array, the RF inputs connection of frequency mixer group, the IF output ends of frequency mixer group successively with bandpass filter, power amplifier, A/D converter is connected.Its advantage is can to realize the measurement of vertical field the entire profile Electron temperature profile under 1.0 2.5T plasma discharge conditions, and measurement frequency scope is up to 40 220GHz.
Description
Technical field
The invention belongs to a kind of nuclear fusion plasma microwave diagnostic device, and in particular to a kind of super based on frequency doubling technology
Broadband frequency sweep microwave radiometer.
Background technology
In fusion reactor, plasma will produce self-holding thermonuclear reaction, and the energy of release is by alpha particle
Carried with neutron.Alpha particle produces heat exchange with electronics first, imparts thermal energy to electronics, then passes through electronics and ion
Collision energy is transmitted to ion.So thermotransport is to determine the critical process that can self-holding thermonuclear reaction be carried out.Support card
High-temperature plasma in mark is by magnetically confined, due to the effect of Lorentz force, and electronics makees circumnutation, produces electron cyclotron
Radiation（ECE）.ECE intensity carries many important parameters of plasma, such as：Electron temperature, density, velocity of electrons distribution
Deng.Under conditions of optics thickness is met, plasma ECE second harmonic radiation intensity proportional is in electron temperature.Microwave diagnostics
It can go deep into inside plasma, measure electron density and Electron temperature profile and the disturbance of high time-space resolution, it is currently to exist
One of advanced diagnostic techniques that main several fusion facilities are first developed in the world.To realize that plasma internal electron temperature is disturbed
The measurements such as dynamic and distribution are, it is necessary to obtain high vertical field and the low ECE information for indulging plasma cross-section whole off field, therefore development is super
The radiometer in broadband is particularly important.
Initial electron gyroradiation measurement mainly uses Michelson's interferometer, although the frequency spectrum of relative broad range can be scanned,
But its usual time resolution and spatial discrimination are all excessively poor, and the measurement of electron temperature in tokamak has been rarely used at present.
Superhet ECE measuring systems are more complicated, it is necessary to which multiple two grades of local oscillators carry out down coversion.In addition, the spatial point of measurement is interruption, no
It is observed that the consecutive variations of ECE frequency spectrums.At present, the very many backward wave tube wide-band microwave sources of in the market, but they are costly, and
And short life.
The content of the invention
It is an object of the invention to provide a kind of ultra wide band frequency sweep microwave radiometer based on frequency doubling technology, it can be monitored simultaneously
The ECE continuous frequency spectrums of 40-220GHz scopes, the vertical field scope of measurement is 1.0-2.5T, and the time resolution of whole continuous spectrum is less than
1ms.At low vertical field, the harmonic wave of measurement can reach that the harmonic wave of measurement can reach 7 times.
The present invention is achieved in that the ultra wide band scanning microwave radiometer based on frequency doubling technology, and it includes random waveform
Generator, broadband VCO sources, input of the AWG successively with broadband VCO sources, isolator, power divider are connected,
LO input of first three output end of power divider successively with frequency multiplier group, frequency mixer group is connected, and the of power divider
Four output ends are connected with wave detector, oscillograph, and reception antenna input receives the signal from plasma resonance, reception antenna
RF input of the output end successively with bandstop filter, waveguide power distribution array, frequency mixer group is connected, and the IF of frequency mixer group is defeated
Go out end to be connected with bandpass filter, power amplifier, A/D converter successively.
Described isolator includes first group of isolator and second group of isolator, and described bandpass filter includes first group
Bandpass filter and second group of bandpass filter, described power amplifier include first group of power amplifier, second group of power
Amplifier and the 3rd group of power amplifier, described wave detector include first group of wave detector and second group of wave detector, broadband VCO sources
Output end be connected with the input of first group of isolator；The output end of first group of isolator and the input of power divider connect
Connect；The output end that the input of second group of isolator distributes array with waveguide power respectively is connected；The output of second group of isolator
End is connected with the RF inputs of frequency mixer group respectively；The input of the IF output ends of frequency mixer group respectively with first group of bandpass filter
End connection；Input of the output end of first group of bandpass filter respectively with first group of power amplifier is connected；First group of power
Input of the output end of amplifier respectively with second group of bandpass filter is connected, the output end difference of second group of bandpass filter
It is connected with the input of second group of power amplifier；4th output end of power divider and the input of first group of wave detector
Connection；The output end of first group of wave detector is connected with oscillograph；The output end of second group of power amplifier respectively with second group of inspection
The input connection of ripple device, the input of the output end of second group of wave detector respectively with the 3rd group of power amplifier is connected, and the 3rd
The output end of group power amplifier is connected with the input of A/D converter respectively.
The voltage signal of described AWG output is directly connected to broadband VCO sources as the control in VCO sources
Voltage, the power divider that the microwave signal that broadband VCO sources are exported is output to one point four after first group of isolator isolation enters
Row power distribution, the preceding three-way output signal of power divider is carried out respectively through the frequency multiplier group of 4 frequencys multiplication, 6 frequencys multiplication, 11 frequencys multiplication
The LO inputs of frequency mixer group are output to after frequency amplification, the 4th road output signal of power divider is by first group of detection
Oscillograph is output to after device detection to be monitored, the plasma resonance signal received by reception antenna hinders by 68GHz band
Wave filter is filtered out after electron cyclotron wave spurious signal, and power distribution, waveguide are carried out by one point three of waveguide power distribution array
The output signal of power distribution array is output to the RF inputs end of frequency mixer group after second group of isolator isolation, from mixed
The microwave signal of frequency device group LO inputs and carry out the plasma signals of self-mixing device group RF inputs after the mixing of frequency mixer group,
Intermediate-freuqncy signal is exported from frequency mixer group IF ends, first group of band-pass filter, first group of power amplifier is sequentially passed through
Amplification, second group of band-pass filter, second group of power amplifier amplification, second group of detector, the 3rd group of work(
A/D converter is output to after rate amplifier power amplification and carries out signal transacting.
It is an advantage of the invention that it realizes the frequency sweep output of high frequency using 10-20GHz broadband VCO source technologies, using many
Branch road frequency multiplier mixer technology, power distributing technique realize the ECE spectrum measurements of ultra wide band, and vertical field can be realized in 1.0-2.5T etc.
The measurement of the entire profile Electron temperature profile under the conditions of plasma discharge, measurement frequency scope is up to 40-220GHz.Frequency multiplier is
Power drive and output correcting flatness are designed with Active multiplier, frequency multiplier, its power output is 13dBm or so.Using
Bandstop filter filters out high-power 68GHz electron cyclotron wave signal, can be good at each element of protection system and prevents pair
The interference of ECE frequency spectrums to be measured.From the bandpass filter of suitable frequency and bandwidth, higher time resolution is resulted in.Pass through
Adjust the gain of power amplifier, the power for making output suit the requirements.The system of the present invention is except can be used in plasma
Frequency analysis of spectrum, moreover it can be used to the high-frequency wideband analysis of spectrum of other field, such as radar monitoring, high frequency communications, microwave radiation monitoring
Deng.
Brief description of the drawings
Fig. 1 is the schematic diagram of the ultra wide band frequency sweep microwave radiometer provided by the present invention based on frequency doubling technology.
In figure：1 AWG, 2 broadband VCO sources, 3 first groups of isolators, 4 power dividers, 5 frequency multiplier groups, 6
Frequency mixer group, 7 second groups of isolators, 8 waveguide powers distribution array, 9 bandstop filters, 10 reception antennas, 11 first groups of band logicals
Wave filter, 12 first groups of power amplifiers, 13 second groups of bandpass filters, 14 second groups of power amplifiers, 15 second groups of detections
Device, 16 the 3rd groups of power amplifiers, 17 A/D converters, 18 first groups of wave detectors, 19 oscillographs.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples：
As shown in figure 1, a kind of ultra wide band frequency sweep microwave radiometer based on frequency doubling technology provided by the present invention, including appoint
Meaning waveform generator（AWG）1st, broadband VCO sources 2, first group of isolator 3, power divider 4, frequency multiplier group 5, frequency mixer group 6,
Second group of isolator 7, waveguide power distribution array 8, bandstop filter 9, reception antenna 10, first group of bandpass filter 11, the
One group of power amplifier 12, second group of bandpass filter 13, second group of power amplifier 14, second group of wave detector 15, the 3rd group
Power amplifier 16, A/D converter（ADC）17th, first group of wave detector 18, oscillograph（Monitor）19.
The output end of AWG 1 is connected with the input in broadband VCO sources 2, the output end in broadband VCO sources 2 with
The input connection of first group of isolator 3, the output end of first group of isolator 3 is connected with the input of power divider 4, power
Distributor 4 is No. four power dividers, first three output end of power divider 4 successively with frequency multiplier group 5, frequency mixer group 6
Local oscillator input（LO）Connection, the 4th output end of power divider 4 connects with first group of wave detector 18, oscillograph 19 successively
Connect.Reception antenna 10 receives the radiation signal of plasma, the output end of reception antenna 10 successively with bandstop filter 9, waveguide
The input connection of power distribution array 8, waveguide power distribution array 8 is three tunnel waveguide power distribution arrays, waveguide power point
The output end of ligand array 8 successively with second group of isolator 7, the rf inputs of frequency mixer 6（RF）Connection.The intermediate frequency of frequency mixer 6
Output end（IF）Successively with first group of bandpass filter 11, first group of power amplifier 12, second group of bandpass filter 13, second
Group power amplifier 14, second group of wave detector 15, the 3rd group of power amplifier 16, A/D converter 17 are connected.Frequency multiplier group 5
In the quantity of middle frequency multiplier, frequency mixer group 6 in the quantity of frequency mixer, second group of isolator 7 isolator quantity, first group of band logical
The quantity of bandpass filter, quantity, the second group of band logical of first group of intermediate power amplifier of power amplifier 12 are filtered in wave filter 11
The quantity of bandpass filter in ripple device 13, the quantity of second group of intermediate power amplifier of power amplifier 14, second group of wave detector 15
The quantity of middle wave detector, the quantity of the 3rd group of intermediate power amplifier of power amplifier 16, distribute the defeated of array 8 with waveguide power
Go out to hold quantity identical.
Input of first three output end of power divider 4 respectively with each frequency multiplier in frequency multiplier group 5 is connected.
LO input of the output end of each frequency multiplier in frequency multiplier group 5 respectively with a frequency mixer in frequency mixer group 6 is connected.
Input of each output end of waveguide power distribution array 8 respectively with an isolator in second group of isolator 7 is connected.The
RF input of the output end of each isolator respectively with a frequency mixer in frequency mixer group 6 is connected in two groups of isolators 7.It is mixed
The IF output ends of each frequency mixer are defeated with a bandpass filter in first group of bandpass filter 11 respectively in frequency device group 6
Enter end connection.The output end of each bandpass filter in first group of bandpass filter 11 respectively with first group of power amplifier
The input connection of a power amplifier in 12.The output of each power amplifier in first group of power amplifier 12
The input respectively with a bandpass filter in second group of bandpass filter 13 is held to be connected.In second group of bandpass filter 13
Each bandpass filter output end input respectively with a power amplifier in second group of power amplifier 14
Connection.The output end of each power amplifier in second group of power amplifier 14 respectively with one in second group of wave detector 15
The input connection of individual wave detector.The output end of each wave detector in second group of wave detector 15 is put with the 3rd group of power respectively
The input connection of a power amplifier in big device group 16.Each power amplifier in 3rd group of power amplifier 16
Output end be all connected to A/D converter.
The output frequency in the broadband VCO sources 2 determines by the type in VCO sources 2, the output voltage of AWG 1,
Such as output frequency of broadband VCO sources 2 can be operated between 10-20GHz.
First group of bandpass filter 11 is high-pass filter, and medium-frequency IF is drawn for filtering out frequency mixer local oscillation signal LO
The interference risen, generally selects about 100M high-pass filter.
Second group of bandpass filter 13 is low pass filter, for removing high-frequency microwave interference signal, improves space
The measurement accuracy of resolution ratio and frequency spectrum, generally selects about 1GHz low pass filter.
The working frequency of the power divider 4 is 10-20GHz, and Efferent tube number is determined by required microbeam quantity,
4 output channels may be selected.First three passage is used for plasma spectrum measurement, and the 4th passage is library track, for system
Monitoring.
The output frequency of the frequency multiplier group 5 determines the final working frequency of system, and frequency multiplication number of times can select 4 times times
Frequently, 6 frequencys multiplication and 11 frequencys multiplication, can be composed using measurement frequency scope as 40-220GHz electron gyroradiation.
Described waveguide power distribution array 8 is the waveguide power distribution array of a ultrabroad band, its working frequency by
The overtone order of required measurement determines that the example working frequency that waveguide power distributes array 8 as mentioned can be 40-220GHz, letter
Number it is allocated by working frequency, is output as example here with three tunnels.
The working frequency of first group of described wave detector 18 determines by the output frequency in broadband VCO sources 2, described second group
The working frequency of wave detector 15 is determined by the frequency-selecting result of second group of bandpass filter.
1 a kind of ultra wide band frequency sweep microwave spoke based on frequency doubling technology provided by the present invention is described in detail below in conjunction with the accompanying drawings
Penetrate the operation principle of meter：
The output voltage of AWG 1 is used to be controlled the frequency that broadband VCO sources 2 are exported.First group every
It is used to isolate the microwave signal reflected from power divider 4 from device 3, prevents incidence wave and back wave from interfering, influences broadband
The output in VCO sources 2.Second group of isolator 7 is used to isolate the signal reflected from the RF inputs of frequency mixer group 6, makes from plasma
The signal one-way conduction of body transmitting is output to the RF inputs of frequency mixer group 6.
It is four tunnels that the microwave signal isolated by first group of isolator 3 carries out power distribution by power divider 4, first three
Road is entered line frequency by frequency multiplier group 5 respectively and amplified, and is output to the LO inputs of frequency mixer group 6, the 4th tunnel passes through first group of inspection
Ripple device 18 carries out detection and filtered out being output to oscillograph after high frequency carrier component and being monitored.The plasma received by reception antenna 10
Body signal distributes array 8 by being output to waveguide power after bandstop filter 9, and waveguide power distributes array 8 by plasma spoke
Penetrate signal and be divided into three tunnels, each RF input of frequency mixer group 6 is sent to respectively.The working frequency of bandstop filter 9 is 68GHz,
It is used to filter off high-power 68GHz electron cyclotron wave heating signal, with protection system and prevents electronics to be measured
Cyclotron radiation spectrum is by convolution Wave heating interference.The microwave signal inputted by the LO ends of frequency mixer group 6 and the RF by frequency mixer group 6
The plasma signal of end input is mixed in each frequency mixer of frequency mixer group 6, from the IF output ends output of frequency mixer group 6
Frequency signal, is then filtered by first group of wave filter 11, and first group of power amplification of power amplifier 12, second group of wave filter 13 are filtered
After ripple, second group of power amplification of power amplifier 14, second group of detection of wave detector 15, the 3rd group of power amplifier 16 amplify,
It is output in A/D converter 17 and carries out signal transacting.
First group of wave filter 11 is used to carry out frequency-selecting, first group of power amplification to the intermediate-frequency IF signal that frequency mixer group 6 is exported
The working frequency of device 12 is the frequency after first group of frequency-selecting of wave filter 11, and second group of wave filter 13 is used for first group of power amplification
Signal after the power amplification of device 12 carries out second of frequency-selecting, and the working frequency of second group of power amplifier 14 is second group of wave filter
Frequency after 13 frequency-selectings, after the working frequency of second group of wave detector 15 is first group of wave filter 11 and second group of frequency-selecting of wave filter 13
Frequency, the working frequency of the 3rd group of amplifier 16 is the frequency exported after second group of detection of wave detector 15, passes through control the 3rd
The gain of group amplifier 16, controls output signal level.
The present invention is explained in detail above in conjunction with accompanying drawing and implementation, but the present invention is not limited to above-described embodiment,
In the knowledge that those of ordinary skill in the art possess, it can also be made on the premise of present inventive concept is not departed from each
Plant change.The content not being described in detail in the present invention can use prior art.
Claims (1)
1. the ultra wide band frequency sweep microwave radiometer based on frequency doubling technology, it is characterised in that：It include AWG (1),
Broadband VCO sources (2), AWG (1) successively with broadband VCO sources (2), isolator, power divider (4) input
Connection, the LO inputs of first three output end of power divider (4) successively with frequency multiplier group (5), frequency mixer group (6) are connected,
4th output end of power divider (4) is connected with wave detector, oscillograph (19), reception antenna (10) input receive from etc.
The signal of gas ions radiation, reception antenna (10) output end is distributed array (8) with bandstop filter (9), waveguide power successively, mixed
The RF inputs connection of frequency device group (6), the IF output ends of frequency mixer group (6) successively with bandpass filter, power amplifier, mould/
Number converter (17) is connected；Described isolator includes first group of isolator (3) and second group of isolator (7), described band logical
Wave filter includes first group of bandpass filter (11) and second group of bandpass filter (13), and described power amplifier includes first
Group power amplifier (12), second group of power amplifier (14) and the 3rd group of power amplifier (16), described wave detector include
First group of wave detector (18) and second group of wave detector (15), the output end in broadband VCO sources (2) are defeated with first group of isolator (3)
Enter end connection；The output end of first group of isolator (3) is connected with the input of power divider (4)；Second group of isolator (7)
The output end that input distributes array (8) with waveguide power respectively is connected；The output end of second group of isolator (7) respectively with mixing
The RF inputs connection of device group (6)；The input of the IF output ends of frequency mixer group (6) respectively with first group of bandpass filter (11)
Connection；Input of the output end of first group of bandpass filter (11) respectively with first group of power amplifier (12) is connected；First
Input of the output end of group power amplifier (12) respectively with second group of bandpass filter (13) is connected, second group of bandpass filtering
Input of the output end of device (13) respectively with second group of power amplifier (14) is connected；The 4th of power divider (4) is defeated
Go out end to be connected with the input of first group of wave detector (18)；The output end of first group of wave detector (18) is connected with oscillograph (19)；
Input of the output end of second group of power amplifier (14) respectively with second group of wave detector (15) is connected, second group of wave detector
(15) input of the output end respectively with the 3rd group of power amplifier (16) is connected, the output of the 3rd group of power amplifier (16)
The input respectively with A/D converter (17) is held to be connected；The voltage signal of described AWG (1) output is direct
Broadband VCO sources (2) are connected to as the control voltage of VCO sources (2), the microwave signal of broadband VCO sources (2) output passes through first group
The power divider (4) that one point four is output to after isolator (3) isolation carries out power distribution, first three road of power divider (4)
Output signal is output to frequency mixer group after entering line frequency amplification respectively through 4 frequencys multiplication, 6 frequencys multiplication, the frequency multiplier group (5) of 11 frequencys multiplication
(6) LO inputs, the 4th road output signal of power divider (4) is output to after first group of wave detector (18) detection
Oscillograph (19) is monitored, and the plasma resonance signal received by reception antenna (10) passes through 68GHz bandstop filter
(9) filter out after electron cyclotron wave spurious signal, distributing array (8) by one point three of waveguide power carries out power distribution, waveguide
The output signal of power distribution array (8) is output to the RF inputs of frequency mixer group (6) after second group of isolator (7) isolation
End, carrys out the microwave signal of self-mixing device group (6) LO inputs and exists with carrying out the plasma signal of self-mixing device group (6) RF inputs
After frequency mixer group (6) mixing, intermediate-freuqncy signal is exported from frequency mixer group (6) IF ends, first group of bandpass filter (11) is sequentially passed through
Filtering, first group of power amplifier (12) power amplification, second group of bandpass filter (13) filtering, second group of power amplifier
(14) analog is output to after power amplification, second group of wave detector (15) detection, the 3rd group of power amplifier (16) power amplification to turn
Parallel operation (17) carries out signal transacting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310466995.6A CN104569584B (en) | 2013-10-09 | 2013-10-09 | Ultra wide band frequency sweep microwave radiometer based on frequency doubling technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310466995.6A CN104569584B (en) | 2013-10-09 | 2013-10-09 | Ultra wide band frequency sweep microwave radiometer based on frequency doubling technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104569584A CN104569584A (en) | 2015-04-29 |
| CN104569584B true CN104569584B (en) | 2017-08-18 |
Family
ID=53086121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310466995.6A Active CN104569584B (en) | 2013-10-09 | 2013-10-09 | Ultra wide band frequency sweep microwave radiometer based on frequency doubling technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104569584B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449965B (en) * | 2016-05-30 | 2019-12-24 | 中国科学院国家空间科学中心 | Satellite-borne microwave radiometer |
| CN110398781A (en) * | 2019-08-05 | 2019-11-01 | 深圳迈睿智能科技有限公司 | Anti-interference microwave sounding module and anti-interference method |
| CN112566348B (en) * | 2020-12-01 | 2022-02-15 | 大连理工大学 | Dual-band multi-beam microwave diagnosis system for electron density disturbance localized measurement |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101030668A (en) * | 2007-02-28 | 2007-09-05 | 上海杰盛无线通讯设备有限公司 | Wide-band microwave local oscillator generator combined direct multiply-frequency with lock phase |
| CN102829874A (en) * | 2012-08-21 | 2012-12-19 | 北京琨奇电子***有限公司 | Microwave high spectrum radiometer |
-
2013
- 2013-10-09 CN CN201310466995.6A patent/CN104569584B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101030668A (en) * | 2007-02-28 | 2007-09-05 | 上海杰盛无线通讯设备有限公司 | Wide-band microwave local oscillator generator combined direct multiply-frequency with lock phase |
| CN102829874A (en) * | 2012-08-21 | 2012-12-19 | 北京琨奇电子***有限公司 | Microwave high spectrum radiometer |
Non-Patent Citations (2)
| Title |
|---|
| Multifrequency microwave radiometer measurments of snow on lake ice;Martti Hallikainen etc;《2012 IEEE》;20121231;第142-145页 * |
| 多通道集成电路航天微波辐射计;林溪波;《上海航天》;19951231(第1期);文章第44页左栏第1段-第45页右栏第1段，图1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104569584A (en) | 2015-04-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Luhmann Jr et al. | Instrumentation for magnetically confined fusion plasma diagnostics | |
| CN105101599B (en) | A kind of polarization ECE diagnostic systems for measuring plasma current distribution | |
| Basse et al. | Diagnostic systems on alcator c-mod | |
| CN109613335B (en) | Microwave signal frequency measurement device and method based on cyclic frequency shift | |
| CN104569584B (en) | Ultra wide band frequency sweep microwave radiometer based on frequency doubling technology | |
| CN203798907U (en) | Multi-channel broadband microwave radiometer with self-calibration function | |
| CN104950171B (en) | A kind of multiple tracks wide-band microwave radiometer with self calibrating function | |
| Stejner et al. | Collective Thomson scattering measurements with high frequency resolution at TEXTOR | |
| Stejner et al. | Resolving the bulk ion region of millimeter-wave collective Thomson scattering spectra at ASDEX Upgrade | |
| CN103543349A (en) | Wideband multi-beam microwave source correlation reflection measuring system on basis of VCO (voltage controlled oscillator) modulation | |
| CN203799016U (en) | Zero-intermediate frequency multichannel microwave Doppler measurement system | |
| CN104950312B (en) | Zero intermediate frequency multiple tracks microwave Doppler measuring system | |
| CN203859921U (en) | Polarized electron cyclotron emission (ECE) diagnosis system for measuring plasma current distribution | |
| Zhao et al. | A multi-channel correlation ECE system for electron temperature fluctuation measurement on EAST tokamak | |
| Bin et al. | First operations with the new Collective Thomson Scattering diagnostic on the Frascati Tokamak Upgrade device | |
| Chatterjee et al. | High resolution ECE radiometer for electron temperature profile and fluctuation measurements on Alcator C-Mod | |
| Udintsev et al. | New ECE diagnostics for the TEXTOR-94 tokamak | |
| Pavlichenko et al. | First measurements of line electron density in Uragan-2M plasmas via 140 GHz heterodyne interferometer | |
| CN101620007B (en) | Full solar disk sun imager adopting two-channel atomic light filtering technology | |
| Kawahta et al. | HCN laser scattering on the JIPP T-IIU tokamak | |
| Meneses et al. | First density profile measurements using frequency modulation of the continuous wave reflectometry on JET | |
| Kubo et al. | Collective Thomson scattering study using gyrotron in LHD | |
| CN110806510B (en) | System for measuring wave number in direction of 4.6GHz low-clutter parallel magnetic field | |
| Jeong et al. | Design of a heterodyne electron cyclotron emission system on KSTAR | |
| Colafrancesco et al. | Cosmology with galaxy clusters: studying the Dark Ages and the Epoch of Reionization in the SKA era |
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 |