CN110491752A - A kind of DIFFRACTION RADIATION OSCILLATOR of multi electron beam - Google Patents
A kind of DIFFRACTION RADIATION OSCILLATOR of multi electron beam Download PDFInfo
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- CN110491752A CN110491752A CN201910665293.8A CN201910665293A CN110491752A CN 110491752 A CN110491752 A CN 110491752A CN 201910665293 A CN201910665293 A CN 201910665293A CN 110491752 A CN110491752 A CN 110491752A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
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Abstract
A kind of DIFFRACTION RADIATION OSCILLATOR the invention discloses multi electron beam includes: upper and lower two mirror surfaces and the symmetrical double grating of multiple groups of Open architecture；When the electronics of emitter transmitting passes through double grating gap, the electromagnetic wave modulation that can be propagated along grating surface forms electron beam group, the electron beam that modulation is formed is rolled into a ball to space and excites space charge wave, space charge wave is under the reflex of upper and lower mirror surface, the stable higher-order of oscillation is formed in the cavity, and high-frequency electric field occurs note wave interaction with electron beam again in turn, energy exchange occurs, it is coupled out after its energy supposition by output port, so as to improve the output power of device.
Description
Technical field
The invention belongs to microwave electron tube technical fields, more specifically, are related to a kind of diffraction of multi electron beam
Radiation Oscillator.
Background technique
On the basis of Smith-Purcell effect and principle, developing can work in millimeter wave, submillimeter wave people
The Novel electronic devices of wave band, such device are known as DIFFRACTION RADIATION OSCILLATOR.Millimeter wave and submillimeter wave technology image objects,
Non-destructive testing, medical diagnosis, broadband connections, radar etc. have great scientific research value and application prospect, especially to small-sized
Change, the research of high power millimeter wave and submillimeter radiation source.
DIFFRACTION RADIATION OSCILLATOR is the radio frequency system formed using Quasi-optical Cavity and periodic grating.Root
According to Fu Luokui theorem it is found that in the necessarily period of the field in periodic structure, periodic optical grating construction realizes electron beam and field
Distribution interaction.Resonant cavity is closed relative to tradition, open structure can will be unsatisfactory for the mould of open boundary condition
Formula is overflowed, so that intracavity modal density is reduced, reduction mode competition.Meanwhile DIFFRACTION RADIATION OSCILLATOR also have operating voltage and
The feature that electric current is low, output power is high, electronic efficiency is high, device size is small, spectral characteristic is excellent, frequency stability is high, and
With certain mechanical tuning and electric tuning characteristic, thus device has certain bandwidth.
With the increase of frequency, the output power of device is substantially reduced, if can further increase device on this basis
The output power of part, then the application value of device can be further improved.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of DIFFRACTION RADIATION OSCILLATOR of multi electron beam,
Radio frequency system is formed by open quasi-optical resonant cavity and periodic, improves the output power of device.
For achieving the above object, a kind of DIFFRACTION RADIATION OSCILLATOR of multi electron beam of the present invention, which is characterized in that packet
It includes: upper and lower two mirror surfaces and the symmetrical double grating of multiple groups of Open architecture；
The upper mirror surface is the cylindrical mirror to concave, is provided with coupling aperture in the centre of cylindrical mirror, is put for coupling output
High frequency field energy after big；
The lower mirror surface is plane mirror, is reserved with certain distance between upper and lower two mirror surfaces, makes DIFFRACTION RADIATION OSCILLATOR
Open type structure；It is provided with rectangular channel on plane mirror, the symmetrical double grating of multiple groups is placed on the bottommost of rectangular channel, above grating
Hollow out rectangular channel is matching slot, by the distance between change matching groove width and two mirror surfaces, makes the symmetrical double grating of multiple groups
Match；
The symmetrical double grating of multiple groups is placed side by side, is separated between every group of symmetrical double grating with a metal baffle, every group
The left and right ends of symmetrical double grating are respectively the emitter and receiving pole of electron beam, the grating gap between emitter and receiving pole
For electron injection channel；
The emitter while launching electronics beam of the symmetrical double grating of multiple groups are input to corresponding electron injection channel, multiple groups electricity
Beamlet passes through in electron beam channel simultaneously, and due to the periodicity and slow wave characteristic of bigrating structures, every group of electron beam all can be by
The slow electromagnetic wave modulation propagated along symmetric double grating surface excites space charge wave to space again at electron beam group, electron beam group,
Space charge wave forms stable higher-order of oscillation electric field, higher-order of oscillation electric field under the reflex of upper and lower mirror surface in the cavity
Note wave interaction occurs with electron beam again in turn, electronics loses energy, and high frequency field obtains energy, realize energy exchange, due to
The structure of each symmetrical double grating is identical as dimensional parameters, and each electronics note can carry out note wave interaction with higher-order of oscillation electric field
With, the identical high frequency field of frequency is formed, finally, the electronics for carrying out note wave interaction with high frequency field is then collected by collector,
And the higher-order of oscillation electric field after multiple groups positive energy exchange is overlapped in output port, and is coupled and exported by output port, thus
Improve the output power of device.
Goal of the invention of the invention is achieved in that
A kind of DIFFRACTION RADIATION OSCILLATOR of multi electron beam of the present invention includes: upper and lower two mirror surfaces of Open architecture and more
The symmetrical double grating of group；When the electronics of emitter transmitting passes through double grating gap, the electromagnetic wave modulation that propagated along grating surface is understood
Electron beam group is formed, the electron beam group for modulating formation excites space charge wave to space, and space charge wave is anti-upper and lower mirror surface
It penetrates under effect, forms the stable higher-order of oscillation in the cavity, note wave interaction, hair occur with electron beam again in turn for high-frequency electric field
Raw energy exchange, energy supposition is coupled out by output port later, so as to improve the output power of device.
Meanwhile a kind of DIFFRACTION RADIATION OSCILLATOR of multi electron beam of the present invention also has the advantages that
(1), a kind of multi electron beam DIFFRACTION RADIATION OSCILLATOR proposed by the present invention, in working frequency range and single electronic beam diffraction spoke
It penetrates in the identical situation of oscillator, since multigroup electron beams can carry out note wave interaction with high-frequency electric field, when work electricity
In the case that pressure is slightly lower compared to single electronic beam DIFFRACTION RADIATION OSCILLATOR, power output is enhanced；
(2), a kind of multi electron beam DIFFRACTION RADIATION OSCILLATOR proposed by the present invention, the electron beam channel ruler of each slow wave circuit
It is very little identical as single electronic beam design, secondly, radio frequency system of the invention includes the slow of multiple single electronic beam DIFFRACTION RADIATION OSCILLATORs
Wave circuit, thus the present invention can in the case where not increasing current density, at double increase homogeneous tube using electric current；
(3), a kind of multi electron beam DIFFRACTION RADIATION OSCILLATOR proposed by the present invention, since multigroup electron beams are placed side by side in flat
The bottom of face mirror, therefore the focusing for electron beam, it is identical as single electronic beam DIFFRACTION RADIATION OSCILLATOR, only need a focusing system
System, does not need again additional increase focusing system.
Detailed description of the invention
Fig. 1 is a kind of a kind of specific embodiment three-dimensional structure signal of DIFFRACTION RADIATION OSCILLATOR of multi electron beam of the present invention
Figure；
Fig. 2 is a kind of vertical section three dimensional structure diagram of the DIFFRACTION RADIATION OSCILLATOR of multi electron beam of the present invention；
Fig. 3 is symmetrical double grating three dimensional structure diagram；
Fig. 4 is a kind of upper mirror surface three dimensional structure diagram of the DIFFRACTION RADIATION OSCILLATOR of multi electron beam of the present invention；
Fig. 5 is a kind of result figure that the output signal of the DIFFRACTION RADIATION OSCILLATOR of multi electron beam changes over time of the present invention；
Fig. 6 is a kind of output signal Fourier transformation result figure of the DIFFRACTION RADIATION OSCILLATOR of multi electron beam of the present invention；
Fig. 7 be one with the present embodiment identical structure, similar frequency bands single-electron beam DIFFRACTION RADIATION OSCILLATOR output
The result figure that signal changes over time.
Specific embodiment
A specific embodiment of the invention is described with reference to the accompanying drawing, preferably so as to those skilled in the art
Understand the present invention.Requiring particular attention is that in the following description, when known function and the detailed description of design perhaps
When can desalinate main contents of the invention, these descriptions will be ignored herein.
Embodiment
Fig. 1 is a kind of a kind of specific embodiment three-dimensional structure signal of DIFFRACTION RADIATION OSCILLATOR of multi electron beam of the present invention
Figure.
In the present embodiment, as shown in Figure 1, a kind of DIFFRACTION RADIATION OSCILLATOR of multi electron beam of the present invention, comprising: open
Upper and lower two mirror surfaces and the symmetrical double grating of multiple groups of structure；
As shown in figure 4, upper mirror surface is the cylindrical mirror to concave, it is provided with coupling aperture in the centre of cylindrical mirror, for coupling
Export amplified high frequency field energy；In the present embodiment, upper mirror surface can also be plane mirror or the spherical mirror that concaves, can be with
According to specific circumstances, suitable mirror surface structure is selected.
Lower mirror surface is plane mirror, is reserved with certain distance between upper and lower two mirror surfaces, keeps DIFFRACTION RADIATION OSCILLATOR open
Formula structure；As shown in Fig. 2, being provided with rectangular channel on plane mirror, the symmetrical double grating of multiple groups is placed on the bottommost of rectangular channel, grating
The hollow out rectangular channel of top is matching slot, by the distance between change matching groove width and two mirror surfaces, makes multiple groups symmetric double
Grating matching；
As shown in Fig. 2, in the present embodiment, it is placed side by side using three groups of symmetrical double gratings, between every group of symmetrical double grating
It is separated with a metal baffle, the effect of metal baffle is to constitute electric wall, is in the form of ensuring the field in every group of symmetrical grating
It is identical, while the interference of electromagnetic field between symmetrical double grating is reduced, in this way the interaction of three electron beams and field can just formed
The result of superposition；
The left and right ends of every group of symmetrical double grating are respectively the emitter and receiving pole of electron beam, and emitter is for generating electricity
Beamlet, for receiving pole for receiving electron beam, the grating gap between emitter and receiving pole is electron injection channel, emitter
The electron beam of generation is received behind electron injection channel by receiving pole；Multiple electron beams are so generated under multiple emitters,
And multiple electron beams just determine can have more electronics and high-frequency electric field to carry out note wave interaction；
In the present embodiment, the structure of the symmetrical double grating of single group is as shown in figure 3, symmetrical double grating has periodicity and slow wave
Characteristic；
The emitter while launching electronics beam of the symmetrical double grating of multiple groups are input to corresponding electron injection channel, multiple groups electricity
Beamlet passes through in electron beam channel simultaneously, and due to the periodicity and slow wave characteristic of bigrating structures, every group of electron beam all can be by
The slow electromagnetic wave modulation propagated along symmetric double grating surface excites space charge wave to space again at electron beam group, electron beam group,
Space charge wave forms stable higher-order of oscillation electric field, higher-order of oscillation electric field under the reflex of upper and lower mirror surface in the cavity
Note wave interaction occurs with electron beam again in turn, electronics loses energy, and high frequency field obtains energy, realize energy exchange, due to
The structure of each symmetrical double grating is identical as dimensional parameters, and each electronics note can carry out note wave interaction with higher-order of oscillation electric field
With, the identical high frequency field of frequency is formed, finally, the electronics for carrying out note wave interaction with high frequency field is then collected by collector,
And the higher-order of oscillation electric field after multiple groups positive energy exchange is overlapped in output port, and is coupled and exported by output port, thus
Improve the output power of device.
Fig. 5 is a kind of result figure that the output signal of the DIFFRACTION RADIATION OSCILLATOR of multi electron beam changes over time of the present invention；
In the present embodiment, as shown in figure 5, when DC input power be 45.05W when, about reach after 14ns stablize it is defeated
It does well, the amplitude of output signal is about 5V, and corresponding output power is 12.5W, and it is about 9.2% that electronics, which infuses efficiency,.
Fig. 6 is a kind of output signal Fourier transformation result figure of the DIFFRACTION RADIATION OSCILLATOR of multi electron beam of the present invention；
In the present embodiment, Fourier transformation is carried out to note wave interaction result shown in fig. 5, obtains frequency shown in fig. 6
Spectrogram, by can see on figure, when working frequency is about 336GHz, frequency spectrum is pure.
Fig. 7 be one with the present embodiment identical structure, similar frequency bands single-electron beam DIFFRACTION RADIATION OSCILLATOR output
The result figure that signal changes over time.
In the present embodiment, as shown in fig. 7, when DC input power is 45.9W, the oscillation of single electronic beam Diffracted radiation
Device, when working frequency is 340GHz, output reaches stable state about after 12ns, and output signal amplitude is 3.05V, and correspondence is defeated
Power is 4.65W out, and it is about 10.4% that electronics, which infuses efficiency,.
In conclusion the present invention forms radio frequency system by open quasi-optical resonant cavity and periodic, device can be improved
The output power of part.
Although the illustrative specific embodiment of the present invention is described above, in order to the technology of the art
Personnel understand the present invention, it should be apparent that the present invention is not limited to the range of specific embodiment, to the common skill of the art
For art personnel, if various change the attached claims limit and determine the spirit and scope of the present invention in, these
Variation is it will be apparent that all utilize the innovation and creation of present inventive concept in the column of protection.
Claims (2)
1. a kind of DIFFRACTION RADIATION OSCILLATOR of multi electron beam characterized by comprising upper and lower two mirror surfaces of Open architecture
And the symmetrical double grating of multiple groups；
The upper mirror surface is the cylindrical mirror to concave, is provided with coupling aperture in the centre of cylindrical mirror, after coupling output amplification
High frequency field energy；
The lower mirror surface is plane mirror, is reserved with certain distance between upper and lower two mirror surfaces, keeps DIFFRACTION RADIATION OSCILLATOR open
Formula structure；Rectangular channel is provided on plane mirror, the symmetrical double grating of multiple groups is placed on the bottommost of rectangular channel, the hollow out above grating
Rectangular channel is matching slot, by changing the distance between matching groove width and two mirror surfaces, makes the symmetrical double grating matching of multiple groups；
The symmetrical double grating of multiple groups is placed side by side, is separated out between every group of symmetrical double grating with a metal baffle, passes through gold
Belong to baffle and constitute electric wall, keeps the form of the field in every group of symmetrical grating identical；The left and right ends of every group of symmetrical double grating are respectively
The emitter and receiving pole of electron beam, the grating gap between emitter and receiving pole are electron injection channel；
The emitter while launching electronics beam of the symmetrical double grating of multiple groups, are input to corresponding electron injection channel, multigroup electron beams
Pass through in electron beam channel simultaneously, due to the periodicity and slow wave characteristic of bigrating structures, every group of electron beam all can be by along right
The slow electromagnetic wave modulation for claiming double grating surface to propagate excites space charge wave, space to space again at electron beam group, electron beam group
Charge wave forms stable higher-order of oscillation electric field, the anti-mistake of higher-order of oscillation electric field under the reflex of upper and lower mirror surface in the cavity
That note wave interaction occurs with electron beam again, electronics loses energy, and high frequency field obtains energy, energy exchange is realized, due to each
The structure of symmetrical double grating is identical as dimensional parameters, and each electronics note can carry out note wave interaction, shape with higher-order of oscillation electric field
At the identical high frequency field of frequency, finally, the electronics for carrying out note wave interaction with high frequency field is then collected by collector, and multiple groups
Higher-order of oscillation electric field after positive energy exchange is overlapped in output port, and is coupled and exported by output port, to improve device
The output power of part.
2. a kind of DIFFRACTION RADIATION OSCILLATOR of electron beam according to claim 1, which is characterized in that the upper mirror surface may be used also
The spherical mirror thinking plane mirror or concaving.
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| CN201910665293.8A CN110491752B (en) | 2019-07-23 | 2019-07-23 | Multi-electron-beam diffraction radiation oscillator |
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| CN201910665293.8A CN110491752B (en) | 2019-07-23 | 2019-07-23 | Multi-electron-beam diffraction radiation oscillator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111799640A (en) * | 2020-06-24 | 2020-10-20 | 清华大学 | Terahertz radiator based on stimulated amplification coherent SPR radiation |
| CN111916323A (en) * | 2020-08-21 | 2020-11-10 | 电子科技大学 | Over-mode dual-band extension interaction oscillator based on three-dimensional metal grid |
| CN114724906A (en) * | 2022-05-11 | 2022-07-08 | 电子科技大学 | Grating expansion interaction cavity structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111799640A (en) * | 2020-06-24 | 2020-10-20 | 清华大学 | Terahertz radiator based on stimulated amplification coherent SPR radiation |
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| CN111916323A (en) * | 2020-08-21 | 2020-11-10 | 电子科技大学 | Over-mode dual-band extension interaction oscillator based on three-dimensional metal grid |
| CN111916323B (en) * | 2020-08-21 | 2022-10-11 | 电子科技大学 | Over-mode dual-band expansion interaction oscillator based on three-dimensional metal grid |
| CN114724906A (en) * | 2022-05-11 | 2022-07-08 | 电子科技大学 | Grating expansion interaction cavity structure |
| CN114724906B (en) * | 2022-05-11 | 2023-04-18 | 电子科技大学 | Grating extension interaction cavity structure |
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