CN109975856A - A kind of multi-beam microwave source based on multiplexer - Google Patents
A kind of multi-beam microwave source based on multiplexer Download PDFInfo
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- CN109975856A CN109975856A CN201711448562.2A CN201711448562A CN109975856A CN 109975856 A CN109975856 A CN 109975856A CN 201711448562 A CN201711448562 A CN 201711448562A CN 109975856 A CN109975856 A CN 109975856A
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- 238000012544 monitoring process Methods 0.000 claims description 16
- 238000002955 isolation Methods 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 6
- 230000009897 systematic effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
- G01T1/2914—Measurement of spatial distribution of radiation
Abstract
The present invention relates to microwave signal generation technology fields, specifically disclose a kind of multi-beam microwave source based on multiplexer.A kind of multi-beam microwave source based on multiplexer, the microwave source includes first the second multiplexer of multiplexer and qualitative coupler, wherein, several and output end of first multiplexer is connected by microwave amplifier group with the input terminal of the second multiplexer, the output end of second multiplexer is connected with the input terminal of directional coupler, meanwhile first the coupled end of multiplexer be connected with the input terminal of the first multiplexer.A kind of multi-beam microwave source based on multiplexer of the present invention, can export simultaneously the microwave signal source of multiple frequencies, and has many advantages, such as that at low cost, frequency stability is high, power flatness is high, is easy maintenance and mutually makes an uproar that low, frequency is adjustable.
Description
Technical field
The invention belongs to microwave signal generation technology fields, and in particular to a kind of multi-beam microwave source based on multiplexer.
Background technique
Comb frequencies signal generator has very important application in fields such as electronic circuit, less radio-frequency and microwaves.Its
It can be used as multiple frequency signal sources, the measurement for different frequency point.
In controlled nuclear fusion experimental study, inside plasma the turbulent perturbation of different scale and distribution decide etc. from
The constraint of daughter with transport, obtain the relationship between the disturbance of these different scales for research plasma physics and plasma
Cuing open security control has important help.Microwave reflection is that measurement plasma turbulence is distributed important one of diagnosis, base
Present principles are the upper reflections using microwave in plasma internal electron density cutoff layer.To realize plasma internal electron density
The parameter measurements such as disturbance and distribution, need to emit simultaneously inside the different microwave to plasma of multiple frequencies, these different frequencies
The microwave of rate is reflected in different electron density cutoff layers, can carry out the disturbance of plasma internal reflection cutoff layer simultaneously
And distributed intelligence, therefore the comb frequencies Array signal generator of multiple frequencies is the core for realizing more spatial point measurement measurements.
There are three types of main production methods at present for comb frequencies array: the first is using multiple independent microwave source synthesis.Due to using
Multiple independent microwave source higher costs, the range of measurement, which also compares, to be restricted, and not very practical, this method also only has at present
German ASDEX-U device uses two sets of independent microwave measurement systems, measurement while can only obtaining two spaces point.Second
Kind is, using frequency mixer frequency conversion, due to frequency mixer conversion efficiency problem, the signal frequency power of high order is poor, frequency array quantity
Also less.The third mainly uses nonlinear device, generates such as snap-off diode or with voltage controlled oscillator (VCO) modulation multiple
Frequency-doubled signal or modulated signal, but the intermediate-frequency bandwidth of usually snap-off diode is relatively narrow, in addition also compares and is difficult to reach Microwave Frequency
Section, after frequency multiplication, the power consistency of each Frequency point is not easy to control.
Summary of the invention
The purpose of the present invention is to provide a kind of multi-beam microwave source based on multiplexer solves to generate in the prior art more
When a frequency signal array, the limitation such as multiple signal source higher costs, the lower, narrower bandwidth of Millimeter-Wave Source modulating frequency.
Technical scheme is as follows: a kind of multi-beam microwave source based on multiplexer, which includes more than first
The second multiplexer of work device and qualitative coupler, wherein several and output end of the first multiplexer by microwave amplifier group with
The input terminal of second multiplexer is connected, and the output end of the second multiplexer is connected with the input terminal of directional coupler, meanwhile, the
The coupled end of one multiplexer is connected with the input terminal of the first multiplexer.
First multiplexer and second multiplexer are identical microwave section or radio band multiplexer, defeated
Enter end and output end can be with inequality.
The quantity of first multiplexer and the second multiplexer output end is by the comb frequencies number that needs to generate
Amount determines, and the frequency filtering bandwidth of each output end is not superimposed mutually, does not load mutually, makes to keep height between each output end
Isolation, isolation reach 40dB or more.
Each output end frequency filtering of first multiplexer and second multiplexer is the passband of a peaking
Distribution, and narrower bandwidth, millimeter wave frequency band are usually 50MHz；First multiplexer and the second multiplexer output
2~32 outputs can be achieved in end.
The microwave amplifier group and the output end quantity of first multiplexer match, and connect one to one；
The gain of the microwave amplifier group is greater than the multiplexer return loss that first multiplexer and the second multiplexer form；It is described
The gain of microwave amplifier group is greater than 20dB.
The signal that the second multiplexer synthesizes is couple the first multiplexer by the directional coupler；The directional coupler
The degree of coupling 10~20dB, isolation be greater than 25dB；The working band of the directional coupler is by multiplexer loop back path
Working frequency determines.
Wide-band microwave is equipped between the coupled end of the directional coupler and the first multiplexer input terminal to amplify
Device, the wideband microwave amplifier cover the working frequency points in all channels.
The directional coupler output end passes sequentially through microwave isolator, monitoring coupler and signal output monitoring quantity system
System is connected, and the output end for monitoring coupler is made to be connected with output antenna, is used for objective emission signal to be measured.
The isolator can prevent from having an impact multiplexer circuit by the systematic reflection microwave of periphery, it is required that every
It is greater than 20dB from degree.
The monitoring coupler exports survey for being coupled out signal to signal all the way from directional coupler output signal
Amount system, to obtain microwave signal output frequency and power in real time, the degree of coupling for monitoring coupler is 20dB, and isolation is greater than
25dB, working band are identical as directional coupler.
Remarkable result of the invention is: a kind of multi-beam microwave source based on multiplexer of the present invention, Neng Goutong
When export the microwave signal sources of multiple frequencies, and have at low cost, frequency stability is high, power flatness is high, be easy maintenance and
It mutually makes an uproar the advantages that low, frequency is adjustable.
Detailed description of the invention
Fig. 1 is a kind of multi-beam microwave source structural schematic diagram based on multiplexer of the present invention；
In figure: 1, the first multiplexer；2, microwave amplifier group；3, the second multiplexer；4, directional coupler；5, microwave is isolated
Device；6, coupler is monitored；7, signal exports monitoring quantity system；8, antenna is exported.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, a kind of multi-beam microwave source based on multiplexer, including the first multiplexer 1, microwave amplifier group 2,
Second multiplexer 3 and qualitative coupler 4, wherein several and output end of the first multiplexer 1 by microwave amplifier group 2 with
The input terminal of second multiplexer 3 is connected, and the output end of the second multiplexer 2 is connected with the input terminal of directional coupler 4, together
When, the coupled end of the first multiplexer 1 is connected with the input terminal of the first multiplexer 1；The output end of directional coupler 4 passes sequentially through micro-
Isolator 5, monitoring coupler 6 and signal output monitoring quantity system 7 are connected, and make the output end of monitoring coupler 6 with it is defeated
Antenna 8 is connected out, is used for objective emission signal to be measured；First multiplexer 1 and the second multiplexer 3 are identical microwave section
Or radio band multiplexer, input terminal and output end can be with inequalities；The quantity of 3 output end of first multiplexer 1 and the second multiplexer
The comb frequencies quantity generated by needs is determined, 2~32 outputs, and the frequency filtering band of each output end usually can be achieved
Width is not mutually superimposed, does not load mutually, makes to keep high degree of isolation between each output end, isolation reaches 40dB or more；First
Each output end frequency filtering of multiplexer 1 and the second multiplexer 3 is distributed for the passband of a peaking, and narrower bandwidth, millimeter wave
Frequency range is usually 50MHz or so；Microwave amplifier group 2 is determined according to the output end number of the first multiplexer 1, with the first multiplexing
The output end of device 1 connects one to one, and the gain of microwave amplifier group 2 is greater than the loss in entire multiplexer circuit, usual microwave
The gain of amplifier group 2 is greater than 20dB；If the multiplexer return loss of the first multiplexer 1 and the second multiplexer 3 composition is larger,
Wideband microwave amplifier can be increased between 1 input terminal of coupled end and the first multiplexer of directional coupler 4, covered all logical
The working frequency points in road；The signal that second multiplexer 3 synthesizes can be coupled to the first multiplexer 1 by directional coupler 4, and form multiplexing
The degree of coupling of device loop, directional coupler 4 is greater than 25dB in 10~20dB, isolation, and working band is by multiplexer loop back path
Working frequency determine；The gain of microwave amplifier 2 be slightly less than or close to multiplexer loop back path total insertion loss when, can
Increase the power of the coupled end of directional coupler 4, it is ensured that microwave amplifier group 2 can drive multiplexer circuit and to generate signal defeated
Out；Isolator 5 can prevent from having an impact multiplexer circuit by the systematic reflection microwave of periphery, being usually required that isolation is big
In 20dB；Monitoring coupler 6 exports measuring system for being coupled out signal to signal all the way from 4 output signal of directional coupler
7, to obtain microwave signal output frequency and power in real time, the degree of coupling of monitoring coupler 6 is 20dB, and isolation is greater than 25dB,
Its working band is identical as directional coupler 4.
Claims (10)
1. a kind of multi-beam microwave source based on multiplexer, it is characterised in that: the microwave source includes the first multiplexer more than (1) second
Work device (3) and qualitative coupler (4), wherein several and output end of the first multiplexer (1) passes through microwave amplifier group (2)
It is connected with the input terminal of the second multiplexer (3), the input terminal phase of the output end and directional coupler (4) of the second multiplexer (2)
Connection, meanwhile, the coupled end of the first multiplexer (1) is connected with the input terminal of the first multiplexer (1).
2. a kind of multi-beam microwave source based on multiplexer according to claim 1, it is characterised in that: more than described first
Work device (1) and second multiplexer (3) are identical microwave section or radio band multiplexer, and input terminal and output end can
With inequality.
3. a kind of multi-beam microwave source based on multiplexer according to claim 1, it is characterised in that: more than described first
The quantity of work device (1) and described the second multiplexer (3) output end determines by the comb frequencies quantity for needing to generate, and each defeated
The frequency filtering bandwidth of outlet is not superimposed mutually, does not load mutually, makes to keep high degree of isolation between each output end, isolation reaches
To 40dB or more.
4. a kind of multi-beam microwave source based on multiplexer according to claim 1, it is characterised in that: more than described first
Each output end frequency filtering of work device (1) and second multiplexer (3) be a peaking passband be distributed, and bandwidth compared with
Narrow, millimeter wave frequency band is usually 50MHz；First multiplexer (1) and described the second multiplexer (3) output end can be realized
2~32 outputs.
5. a kind of multi-beam microwave source based on multiplexer according to claim 1, it is characterised in that: the microwave is put
Big device group (2) and the output end quantity of first multiplexer (1) match, and connect one to one；The microwave amplifier
The multiplexer return loss that the gain of group (2) is greater than first multiplexer (1) and the second multiplexer (3) forms；The microwave
The gain of amplifier group (2) is greater than 20dB.
6. a kind of multi-beam microwave source based on multiplexer according to claim 1, it is characterised in that: the orientation coupling
The signal that the second multiplexer (3) synthesizes is couple the first multiplexer (1) by clutch (4)；The degree of coupling of the directional coupler (4)
It is greater than 25dB in 10~20dB, isolation；The working band of the directional coupler (4) by multiplexer loop back path work frequency
Rate determines.
7. a kind of multi-beam microwave source based on multiplexer according to claim 1, it is characterised in that: the orientation coupling
Wideband microwave amplifier, the wide-band microwave are equipped between the coupled end of clutch (4) and described the first multiplexer (1) input terminal
Amplifier covers the working frequency points in all channels.
8. a kind of multi-beam microwave source based on multiplexer according to claim 1, it is characterised in that: the orientation coupling
Clutch (4) output end passes sequentially through microwave isolator (5), monitoring coupler (6) is connected with signal output monitoring quantity system (7)
It connects, and the output end for monitoring coupler (6) is made to be connected with output antenna (8), be used for objective emission signal to be measured.
9. a kind of multi-beam microwave source based on multiplexer according to claim 8, it is characterised in that: the isolator
(5) it can prevent from having an impact multiplexer circuit by the systematic reflection microwave of periphery, it is required that isolation is greater than 20dB.
10. a kind of multi-beam microwave source based on multiplexer according to claim 8, it is characterised in that: the monitoring
Coupler (6) exports measuring system (7) for being coupled out signal to signal all the way from directional coupler (4) output signal, with
Microwave signal output frequency and power are obtained in real time, the degree of coupling of monitoring coupler (6) is 20dB, and isolation is greater than 25dB,
Working band is identical as directional coupler (4).
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| CN201711448562.2A CN109975856B (en) | 2017-12-27 | 2017-12-27 | Multi-beam microwave source based on multiplexer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN115276832A (en) * | 2021-04-29 | 2022-11-01 | 核工业西南物理研究院 | Multi-point bandwidth frequency band microwave diagnosis system based on double comb-shaped frequencies |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2001308A1 (en) * | 1989-10-24 | 1991-04-24 | Edward A. Richardson | Short range multi-channel microwave transmitter |
| JPH10335095A (en) * | 1997-05-30 | 1998-12-18 | Hitachi Ltd | Microwave applying device |
| US6154682A (en) * | 1997-07-23 | 2000-11-28 | Lg Information & Communications, Ltd. | Self-checking circuit in microwave equipment |
| US6268735B1 (en) * | 1999-06-04 | 2001-07-31 | Teradyne, Inc. | Noise source module for microwave test systems |
| JP2002025798A (en) * | 2000-07-07 | 2002-01-25 | Sumitomo Heavy Ind Ltd | Electron beam monitoring method for microtron |
| US6777684B1 (en) * | 1999-08-23 | 2004-08-17 | Rose Research L.L.C. | Systems and methods for millimeter and sub-millimeter wave imaging |
| TW200506388A (en) * | 2003-08-14 | 2005-02-16 | Advanced Energy Ind Inc | Sensor array for measuring plasma characteristics in plasma processing environments |
| US20120050107A1 (en) * | 2010-05-21 | 2012-03-01 | The Regents Of The University Of Michigan | Phased Antenna Arrays Using a Single Phase Shifter |
| CN202178358U (en) * | 2011-07-28 | 2012-03-28 | 西安空间无线电技术研究所 | Large-span output multiplexer adopting nonstandard ET junction |
| WO2013123522A1 (en) * | 2012-02-16 | 2013-08-22 | Aviat Networks, Inc. | Systems and methods for multi-channel transceiver communications |
| CN103532492A (en) * | 2012-07-02 | 2014-01-22 | 核工业西南物理研究院 | Broadband amplitude modulation millimeter wave reflection system based on waveguide modulation technology |
| CN103543349A (en) * | 2012-07-16 | 2014-01-29 | 核工业西南物理研究院 | Wideband multi-beam microwave source correlation reflection measuring system on basis of VCO (voltage controlled oscillator) modulation |
| US20140319382A1 (en) * | 2011-11-24 | 2014-10-30 | Creo Medical Limited | Gas plasma disinfection and sterilisation apparatus |
| CN106850066A (en) * | 2017-01-24 | 2017-06-13 | 西安电子科技大学 | The device and method of Doppler shift measurement is realized based on dual-polarization modulator |
| CN207992463U (en) * | 2017-12-27 | 2018-10-19 | 核工业西南物理研究院 | A kind of multi-beam microwave source based on multiplexer |
-
2017
- 2017-12-27 CN CN201711448562.2A patent/CN109975856B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2001308A1 (en) * | 1989-10-24 | 1991-04-24 | Edward A. Richardson | Short range multi-channel microwave transmitter |
| JPH10335095A (en) * | 1997-05-30 | 1998-12-18 | Hitachi Ltd | Microwave applying device |
| US6154682A (en) * | 1997-07-23 | 2000-11-28 | Lg Information & Communications, Ltd. | Self-checking circuit in microwave equipment |
| US6268735B1 (en) * | 1999-06-04 | 2001-07-31 | Teradyne, Inc. | Noise source module for microwave test systems |
| US6777684B1 (en) * | 1999-08-23 | 2004-08-17 | Rose Research L.L.C. | Systems and methods for millimeter and sub-millimeter wave imaging |
| JP2002025798A (en) * | 2000-07-07 | 2002-01-25 | Sumitomo Heavy Ind Ltd | Electron beam monitoring method for microtron |
| TW200506388A (en) * | 2003-08-14 | 2005-02-16 | Advanced Energy Ind Inc | Sensor array for measuring plasma characteristics in plasma processing environments |
| US20120050107A1 (en) * | 2010-05-21 | 2012-03-01 | The Regents Of The University Of Michigan | Phased Antenna Arrays Using a Single Phase Shifter |
| CN202178358U (en) * | 2011-07-28 | 2012-03-28 | 西安空间无线电技术研究所 | Large-span output multiplexer adopting nonstandard ET junction |
| US20140319382A1 (en) * | 2011-11-24 | 2014-10-30 | Creo Medical Limited | Gas plasma disinfection and sterilisation apparatus |
| WO2013123522A1 (en) * | 2012-02-16 | 2013-08-22 | Aviat Networks, Inc. | Systems and methods for multi-channel transceiver communications |
| CN103532492A (en) * | 2012-07-02 | 2014-01-22 | 核工业西南物理研究院 | Broadband amplitude modulation millimeter wave reflection system based on waveguide modulation technology |
| CN103543349A (en) * | 2012-07-16 | 2014-01-29 | 核工业西南物理研究院 | Wideband multi-beam microwave source correlation reflection measuring system on basis of VCO (voltage controlled oscillator) modulation |
| CN106850066A (en) * | 2017-01-24 | 2017-06-13 | 西安电子科技大学 | The device and method of Doppler shift measurement is realized based on dual-polarization modulator |
| CN207992463U (en) * | 2017-12-27 | 2018-10-19 | 核工业西南物理研究院 | A kind of multi-beam microwave source based on multiplexer |
Non-Patent Citations (3)
| Title |
|---|
| ZHONGBING SHI 等: "A multiplexer-based multi-channel microwave Doppler backward scattering reflectometer on the HL-2A tokamak", REVIEW OF SCIENTIFIC INSTRUMENTS, vol. 89 * |
| 李英量;丁玄同;刘泽田;石中兵;肖维文;: "HL-2A托克马克中微波诊断系统", 微波学报, no. 01 * |
| 黄建;: "毫米波宽带综合化信道技术研究进展与展望", 电讯技术, no. 09 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN115276832A (en) * | 2021-04-29 | 2022-11-01 | 核工业西南物理研究院 | Multi-point bandwidth frequency band microwave diagnosis system based on double comb-shaped frequencies |
| CN115276832B (en) * | 2021-04-29 | 2024-02-09 | 核工业西南物理研究院 | Multi-point frequency broadband microwave diagnosis system based on double comb frequencies |
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