CN101299477B - Grooved waveguide for electron cyclotron - Google Patents
Grooved waveguide for electron cyclotron Download PDFInfo
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- CN101299477B CN101299477B CN200810044677XA CN200810044677A CN101299477B CN 101299477 B CN101299477 B CN 101299477B CN 200810044677X A CN200810044677X A CN 200810044677XA CN 200810044677 A CN200810044677 A CN 200810044677A CN 101299477 B CN101299477 B CN 101299477B
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Abstract
The invention discloses a gyrotron leaky waveguide, characterized in that, an angular orientation current of one or a plurality of axial grooves (2) in the cutting interfering mode on the inwall of wave-guide (1); an angular orientation groove (4) is arranged on the inwall of the wave-guide (3) for cutting the longitudinal wall current of the interfering mode. When the working mode is the non-axisymmetry mode, an axial groove is arranged the part with zero working mode angular orientation wall current. The width of the axial grooves (2) is much smaller than lambda, and the depth of the axial grooves (2) is 0<D<lambda/2, wherein D is the depth of the groove; the width of the angular orientation groove (4) is much smaller than lambda. The depth of the angular orientation groove (4) is 0<D<lambda/2, wherein D is the depth of groove and lambda is the working wavelength.
Description
Technical field
The present invention relates to a kind of grooved waveguide for electron cyclotron, belong to high power millimeter wave source technology field.
Background technology
Under the promotion of tight demands such as the heated by plasma of microwave weapon, millimetre-wave radar, communication, precise guidance, ceramic post sintering, thermonuclear fusion and high-energy physics, the research of high-power coherent Millimeter-Wave Source is paid much attention in the world, and develops rapidly and become research forward position and focus.Under the development of plasma physics and relativistic electronics drives, people have developed can be at fast wave device---gyrotron (the 1.Twiss R.Q. of the effective work of this wave band, Roberts J.A.Electromagnetic radiation from electrons rotating in anionized medium under the action of a uniform magnetic field.Aust.J.Phys.1958,11:424～432. 2.Schneider J.Stimulated emission of radiation by relativistic electronsin a magnetic field.Phys.Rev.Lett, 1959,2:504-508.3.A.V.Gaponov, " Interaction between irrectilinear electron beams and electromagnetic waves intransmission lines; " Izv.VUZov.Radiofiz., vol.2, pp.836-837,1959.).The gyrotron structure is simple relatively, in very wide frequency range, particularly can produce pulse peak power and continuous wave power in many ways in millimeter wave and submillimeter and terahertz wave band, thereby be paid much attention in the world.In order to obtain high power, the gyrotron general work is in the high order waveguide mode of big lateral dimension, and at this moment waveguide mode is very close, and this just faces serious mode competition problem; Another serious problems that the high-frequency gyrotron faces are that in order to satisfy the cyclotron resonance condition, the first-harmonic gyrotron needs very strong work magnetic field.For example, frequency is at the gyrotron of 94GHz, annotate the efficient mutual effect of first-harmonic of circling round in order to guarantee mode of operation and electronics, the D.C. magnetic field that needs about 3.5 teslas, the desired magnetic field intensity of the gyrotron of harmonic operation is the 1/s (s is a harmonic number) of base time cyclotron harmonic work, but, being accompanied by the increase of harmonic number, the mode competition problem is more and more serious; To expect higher notes ripple interaction efficiency difficulty (the Victor L.Granatstein that also becomes more simultaneously, " A quartercentury of gyrotron research and development ", IEEE TRANS.ON PLASMA SCI., VOL.25, NO.6, pp.1322,1997.).In sum, how suppressing competitive mode is to improve gyrotron stability, thereby obtains the key of high-power high-efficiency, the focus and emphasis of studying at present just.
Summary of the invention
The objective of the invention is provides a kind of grooved waveguide for electron cyclotron at the deficiencies in the prior art.It has in millimeter wave, submillimeter involves the ability that the Terahertz frequency range produces the high-power coherent radiation, and military affairs widely and civil applications prospect are arranged.
Purpose of the present invention has following technical measures to realize
Grooved waveguide for electron cyclotron is to offer one or more axial grooves on the inwall of the smooth waveguide of the device that circles round, to cut off the angle wall electric current of competitive mode; Perhaps on the inwall of waveguide, offer the angle groove, to cut off the axial current of competitive mode.
When mode of operation is non-axial symmetry pattern, be that axial groove is opened in zero place at mode of operation angle wall electric current.
The width of axial groove is than little many of wavelength X.
The degree of depth of axial groove is 0＜D＜λ/2, and D is the degree of depth of groove, and λ is an operation wavelength.
The width of angle groove is than little many of wavelength X.
The angle groove depth is 0＜D＜λ/2, and D is the degree of depth of groove, and λ is an operation wavelength.
The present invention has following advantage:
1. cut off the angle wall electric current of competitive mode and the wall electric current of destruction work pattern not by opening axial groove, competitive mode is suppressed, and the stability of waveguide is enhanced.
2. cut off vertical wall electric current of competitive mode and the wall electric current of destruction work pattern not by angle of release to groove, competitive mode is suppressed, and the stability of waveguide is enhanced.
3. by axially grooved, fixed the polarised direction of mode of operation, can conveniently use.
Description of drawings
Fig. 1 is waveguide cross-section figure, and the waveguide inwall is by axially grooved.
1 waveguide, 2 axial grooves
Fig. 2 is the waveguide longitdinal cross-section diagram, and the waveguide inwall is slotted by angle.
3 waveguides, 4 angle grooves
Fig. 3 is waveguide cross-section figure, and being used for mode of operation is the axially grooved waveguide of the device that circles round of TE21, and groove is that axial symmetry distributes, and angle is 90 degree between groove, and the angle index is not that 2 and 4 pattern is suppressed.
5 waveguides, 6 axial grooves
Embodiment
Below by embodiment the present invention is carried out concrete description; be necessary to be pointed out that at this present embodiment only is used for the present invention is further specified; can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment according to the content of the invention described above.
It is simple in structure, easily manufactured that grooved waveguide for electron cyclotron has, and as Figure 1-3, chooses the fluting scheme according to the mode of operation of the capable wave band of device that circles round, and principle is under the prerequisite that does not influence mode of operation, suppresses competitive mode to greatest extent.
Embodiment 1:
As shown in Figure 1, in circular waveguide, when mode of operation is asymmetric mode TE
11The time, angle wall electric current has 2 zero points, can open 2 axial grooves, and it does not influence TE
11The angle wall electric current of pattern, angle index be not 1 pattern because angle wall electric current is cut off and is suppressed, as λ=8.5mm, groove width D selects 0.5mm, and it is more much smaller than wavelength X, the depth D of groove is selected 2mm, it 0 and λ/2=4.25mm between.
Embodiment 2:
As shown in Figure 3, in circular waveguide, when mode of operation is asymmetric mode TE
21The time, angle wall electric current has 4 zero points, can open 4 axial grooves, and it does not influence TE
21The angle wall electric current of pattern, angle index are not that 2 pattern is because angle wall electric current is cut off and is suppressed.As λ=3mm, groove width D selects 0.3mm, and than little many of wavelength X, the depth D of groove is selected 0.75mm, it 0 and λ/2=1.5mm between.
Embodiment 3:
As shown in Figure 2, in circular waveguide, when mode of operation is symmetric pattern TE
01The time, the scheme that adopts angle to slot, all asymmetric modes are suppressed.As λ=8.5mm, groove width D selects 0.5mm, than little many of wavelength X.The depth D of groove is selected 2mm, it 0 and λ/2=4.25mm between.Other shape waveguide by that analogy.
Claims (1)
1. grooved waveguide for electron cyclotron, it is characterized in that offering on the inwall of this waveguide (1) one or more axial grooves (2) to cut off the angle wall electric current of competitive mode, wherein, when mode of operation is non-axial symmetry pattern, be that axial groove is opened in zero place at mode of operation angle wall electric current; Or on the inwall of waveguide (3), offer one or more angle grooves (4), to cut off the axial walls electric current of competitive mode; Wherein, the width of the axial groove of opening (2) and angle groove (4) than little many of wavelength X, the degree of depth is 0＜D＜λ/2, D is the degree of depth of groove, λ is an operation wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810044677XA CN101299477B (en) | 2008-06-11 | 2008-06-11 | Grooved waveguide for electron cyclotron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810044677XA CN101299477B (en) | 2008-06-11 | 2008-06-11 | Grooved waveguide for electron cyclotron |
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| CN101299477A CN101299477A (en) | 2008-11-05 |
| CN101299477B true CN101299477B (en) | 2010-10-13 |
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| CN200810044677XA Expired - Fee Related CN101299477B (en) | 2008-06-11 | 2008-06-11 | Grooved waveguide for electron cyclotron |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908456B (en) * | 2009-06-03 | 2012-07-04 | 中国科学院电子学研究所 | High-frequency structure and centering method for gyrotron amplifier |
| CN101820089B (en) * | 2010-02-08 | 2012-11-28 | 北京理工大学 | Tera-hertz-based polarization converter in synchronous wireless transceiver system |
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2008
- 2008-06-11 CN CN200810044677XA patent/CN101299477B/en not_active Expired - Fee Related
Non-Patent Citations (5)
| Title |
|---|
| JP特开平8-190871A 1996.07.23 |
| 张宏斌 等.开槽波导3次谐波回旋行波放大管非线性理论与数值模拟.《电子学报》.1999,第27卷(第12期),135-138. |
| 张宏斌等.开槽波导3次谐波回旋行波放大管非线性理论与数值模拟.《电子学报》.1999,第27卷(第12期),135-138. * |
| 鄢扬 等.内外开槽高次谐波回旋管自洽非线性理论.《电子与信息学报》.1999,第21卷(第6期),848-850. |
| 鄢扬等.内外开槽高次谐波回旋管自洽非线性理论.《电子与信息学报》.1999,第21卷(第6期),848-850. * |
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