CN101930886B - Dual-mode gyrotron traveling wave tube amplifier - Google Patents
Dual-mode gyrotron traveling wave tube amplifier Download PDFInfo
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- CN101930886B CN101930886B CN2009100878848A CN200910087884A CN101930886B CN 101930886 B CN101930886 B CN 101930886B CN 2009100878848 A CN2009100878848 A CN 2009100878848A CN 200910087884 A CN200910087884 A CN 200910087884A CN 101930886 B CN101930886 B CN 101930886B
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Abstract
The invention discloses a dual-mode gyrotron traveling wave tube amplifier, and relates to the technology of a microwave source device. The dual-mode gyrotron traveling wave tube amplifier has two-section structure, wherein the first section is a linear amplification section which adopts loss-loading metal waveguide and works at the low step mode; and the second section is a nonlinear amplification section which adopts smooth metal waveguide works at the high step mode; the linear amplification section provides high gain for the amplifier; and the nonlinear amplification section provides high power. The nonlinear amplification section works at the high step mode, thus having higher waveguide transverse size and stability threshold current. The dual-mode gyrotron traveling wave tube amplifier solves the problems of low working current and poor stability of a single-mode amplifier, and has higher output power and more superior stability, thus being a high-power millimeter wave source with good development potential and having development prospect in the important national defense fields such as high resolution long-range radar and the like in China.
Description
Technical field
The present invention relates to microwave source device technology field, is a kind of gyrotron traveling wave tube amplifier that adopts the work of multiple mutual effect pattern.
Background technology
Later stage nineteen fifties; The electronic cyclotron maser interaction principle comes to light; Based on the High-Power Microwave source of this principle theoretical with experimentally all obtain deep research, these High-Power Microwave sources are used at aspects such as current radar communication, directed energy weapon, high gradient accelerators widely.Gyrotron traveling wave tube amplifier is a kind of amplifier based on the electronic cyclotron maser principle.This device has unique broadband and high power characteristics, and this makes it become the first-selected microwave source of development high-resolution imaging radar of future generation.Through the development of nearly half a century, such device still receives having a strong impact on of stability, is difficult to realize through engineering approaches.Therefore, solving the gyrotron traveling wave tube amplifier stability problem, is to improve such device power level, accelerates the key of its engineering practicability.
Conventional gyrotron traveling wave tube amplifier is usually operated on certain low step mode of mutual effect waveguide.When the operating frequency of device was very high, the mutual effect waveguide of device was very little, has limited the power level of device.In the mutual effect waveguide based on the gyrotron traveling wave tube amplifier of distribution losses scheme, High-Power Microwave mainly concentrates on non-linear amplifying sections.Therefore, non-linear amplifying sections can be stablized the power magnitude of the microwave power decision device that amplifies.
Summary of the invention
The objective of the invention is to disclose a kind of dual-mode gyrotron traveling wave tube amplifier, low to solve the single mode amplifier operating current, the problem of poor stability, and have higher power output and more superior stability.
To achieve these goals, technical solution of the present invention is:
A kind of dual-mode gyrotron traveling wave tube amplifier, it has two-stage structure, and first section is the linear amplification section, adopts the waveguide of loss metal-loaded, is operated in low-order mode, and second section is non-linear amplifying sections, adopts the smooth metal waveguide, is operated in higher order mode.
Described dual-mode gyrotron traveling wave tube amplifier, its said linear amplification section, non-linear amplifying sections are the circle metal waveguide, the linear amplification section adopts loss waveguide inwall to be coated with the distribution losses layer; Linear amplification Duan Yiduan peripheral hardware input coupler axially is provided with electron gun in the linear amplification Duan Yiduan, the electron gun transmitting terminal is inside; The linear amplification section other end and non-linear amplifying sections one end are coaxial affixed; The diameter of non-linear amplifying sections is greater than the diameter of linear amplification section; There is a ring-shaped step joint, is covered with concentrated attenuator on the step surface, and the non-linear amplifying sections other end is connected with tubaeform output coupler; Linear amplification section, non-linear amplifying sections are positioned in the magnetic field that object-line bag or superconduction provide.
Described dual-mode gyrotron traveling wave tube amplifier, its said distribution losses layer are that loss pottery or graphite material are made.
Described dual-mode gyrotron traveling wave tube amplifier, its said concentrated attenuator are the coating that attenuating material is made, or the ceramic ring of loss ceramic, or on the wave guide wall of concentrated attenuator, radially slot or the mode of cracking is introduced radiation loss.
Described dual-mode gyrotron traveling wave tube amplifier, its said concentrated attenuator is used for erase amplifier interacting system Waveguide Discontinuities to annotating the harmful effect that the ripple mutual effect causes; For the amplifier of high-average power work, the waveguide outer wall of concentrated attenuator is provided with cooling water channel, to guarantee that the heat that ohmic loss was produced can be conducted fast.
Described dual-mode gyrotron traveling wave tube amplifier, its amplifier adopt the pattern of specific corresponding relation to working: the TE01-TE02 pattern is right, and this pattern is to being operated in the TE01 mould of circular waveguide in linear amplifying sections, and non-linear amplifying sections is operated in the TE02 mould.
Described dual-mode gyrotron traveling wave tube amplifier, its said specific corresponding relation is meant in the working frequency range scope of device, two right patterns of radial position pattern at electron beam place all have akin field distribution; Adopt the right 94GHz amplifier of TE01-TE02 pattern, at the TE01 of linearity range mould, or at the TE02 of non-linear section mould, they all are that circle is symmetrical at the center radius 0.105cm place at electron beam place, and have maximum field intensity
Good effect of the present invention is: adopted the gyrotron traveling wave tube amplifier of dual-mode of operation, had higher stability threshold electric current and the power capacity of Geng Gao, device has better stability and higher power output.Be a kind of high power millimeter wave source that has development potentiality, have development prospect in important national defence fields such as China's high-resolution long-range radars.
Description of drawings
Fig. 1 is a kind of dual-mode gyrotron traveling wave tube amplifier interacting system structural representation of the present invention;
Fig. 2 is that linear amplification section 1 of the present invention is annotated the diffusing graph of a relation of ripple cool colour;
Fig. 3 is that linear amplification section 1 of the present invention is annotated ripple stiffness of coupling figure;
Fig. 4 is that non-linear amplifying sections 2 of the present invention is annotated the diffusing graph of a relation of ripple cool colour;
Fig. 5 is that non-linear amplifying sections 2 of the present invention is annotated ripple stiffness of coupling figure;
Fig. 6 is the cold attenuation rate and the unsteadiness growth rate figure of the microwave field of linear amplification section 1 of the present invention;
Fig. 7 is the starting of oscillation depth map of non-linear amplifying sections 2 of the present invention;
Fig. 8 is the growth rate figure of non-linear amplifying sections 2 of the present invention;
Fig. 9 is the interacting system efficiency chart of 92.3GHz among the present invention;
Figure 10 is the power output figure of the present invention system under the driving of 0.1W.
Embodiment
To combine accompanying drawing that the present invention is specified below, and be to be noted that described embodiment only is being convenient to understanding of the present invention, and it is not played any qualification effect.
A kind of dual-mode gyrotron traveling wave tube amplifier of the present invention, this amplifier has two-stage structure, linear amplification section and non-linear amplifying sections.The linear amplification section provides high-gain for amplifier, and non-linear amplifying sections provides high power.
First section is the linear amplification section, adopts the waveguide of loss metal-loaded, is operated in low-order mode.Metal waveguide is generally circular waveguide, and the waveguide inwall perhaps loads one deck loss pottery through applying consumable material, constitutes distribution losses.Under appropriate loss condition, the mutual effect electronics of amplifier is annotated the pattern mutual effect of certain lower-order in linear amplifying sections and waveguide, with the stable amplification of driving power.In this process, electronics is annotated and is constantly obtained good clustering characteristic.
Second section is non-linear amplifying sections, adopts the smooth metal waveguide, be operated in corresponding certain higher order mode of linear amplification section on.Because non-linear amplifying sections is operated on the higher order mode, has bigger waveguide lateral dimension, this has improved the power capacity of device.Simultaneously the electronics of amplifier annotate with the stiffness of coupling of higher order mode relatively a little less than, so the threshold current of the autoexcitation of device vibration is higher, this makes device can be operated under the higher current condition, so device has stability relatively preferably.
A kind of dual-mode gyrotron traveling wave tube amplifier of the present invention is exactly the waveguide that the non-linear amplifying sections replacement of the gyrotron traveling wave tube amplifier of routine is become appropriate higher order mode; Let the clustering good electron annotate in non-linear amplifying sections and the mutual effect of corresponding high-order pattern; Give microwave field effectively with horizontal kinetic energy; Because the higher order mode waveguide has bigger lateral dimension relatively, so such device has better stability and higher power output.
In order more clearly to set forth the present invention; A kind of dual-mode gyrotron traveling wave tube amplifier that hereinafter is set forth is operated in the first-harmonic of circulating beam; Adopt circular waveguide TE01-TE02 pattern to work, promptly the linear amplification section of device is operated in the TE01 of circular waveguide, and non-linear amplifying sections is operated in the TE02 mould.The design center frequency of amplifying is 94GHz.
Fig. 1 has provided the sketch map of device architecture of the present invention.Wherein, linear amplification section 1, non-linear amplifying sections 2, electron gun 3, electronics annotates 4, magnetic field line bag 5, input coupler 6, output coupler 7, distribution losses layer 8, concentrated attenuator 9, round metal waveguide 10.Wherein, linear amplification section 1, non-linear amplifying sections 2 are circle metal waveguide 10, and linear amplification section 1 inwall is coated with the distribution losses layer 8 that consumable material constitutes; Linear amplification section 1 one end peripheral hardware input couplers 6, the interior electron gun 3 that axially is provided with, electron gun 3 transmitting terminals are inside; Linear amplification section 1 other end and non-linear amplifying sections 2 one ends are coaxial affixed; The diameter of non-linear amplifying sections 2 is greater than the diameter of linear amplification section 1; There is a ring-shaped step joint, is covered with concentrated attenuator 9 on the step surface, and non-linear amplifying sections 2 other ends are connected with tubaeform output coupler 7.
In linear amplifying sections 1, non-linear amplifying sections 2 outsides, be relatively set with pair of magnetic field line bag 5.
Electron gun 3 is launched electronics and is annotated 4.Electronics annotates 4 under the effect of the high-intensity magnetic field that relative two magnetic field line bags 5 are produced, and circles round gradually, reaches appropriate motion state and injects linear amplification section 1 afterwards.Linear amplification section 1 loads one deck distribution losses layer 8 by round metal waveguide 10 inwalls and constitutes.The microwave of lower-wattage magnitude has encouraged the TE01 pattern through input coupler 6 feed-in linear amplification sections 1 in linear amplifying sections 1.Electronics annotate 4 in linear amplifying sections 1 with the mutual effect of TE01 mould, constantly microwave energy is wherein amplified, meanwhile, electronics is annotated 4 continuous clusterings and is got up.Microwave energy after being exaggerated injects non-linear amplifying sections 2, in non-linear section 2, has encouraged the TE02 mould.The clustering good electron is annotated the TE02 mould mutual effect of non-linear amplifying sections 2 of 4 injections and non-linear amplifying sections 2, in non-linear non-amplifying sections 2, has encouraged the High-Power Microwave field rapidly.The High-Power Microwave that is produced is coupled away through output coupler 7, uses in order to other system.Need to prove that round metal waveguide 10 comprises linear amplification section 1 and non-linear amplifying sections 2, just the waveguide radius is different.Normally attenuating material on the non-linear amplifying sections 2 left sections constitutes concentrated attenuator 9 by being coated in, and reduces the influence that the wave guide wall discontinuity causes with this.Concentrated attenuator 9 also has other implementation, the ceramic ring that constitutes like the loss pottery, or on the wave guide wall of concentrated attenuator, radially slot or the mode of cracking is introduced radiation loss.This concentrated attenuator is mainly used in the Waveguide Discontinuities harmful effect that mutual effect causes to the notes ripple in the erase amplifier interacting system.For the amplifier of high-average power work, this concentrated attenuator need add cooling water channel or other cooling provision.
In the present embodiment, the relevant parameter of interacting system is as shown in table 1.
The system parameters of table 194GHz dual-mode gyrotron traveling wave tube amplifier
Diffusing relation of the notes ripple cool colour of linear amplification section 1 and notes ripple stiffness of coupling are respectively as shown in Figures 2 and 3.Diffusing relation of the notes ripple cool colour of non-linear amplifying sections 2 and notes ripple stiffness of coupling are respectively like Fig. 4 and shown in Figure 5.Through above-mentioned dispersion relation figure, can roughly confirm the competitive mode that system faced, through annotating ripple stiffness of coupling figure, can confirm the position of electronics notes direction center.The selection electronics is annotated direction center 0.105cm, can guarantee that the electronics notes have stronger coupling at linear amplifying sections 1 and the main mould TE01 mould of work, can guarantee that again the electronics notes have stronger coupling at the non-linear amplifying sections 2 and the main mould TE02 mould of working.Under current running parameter condition, linear amplification section 1 suppresses the autoexcitation vibration through distribution losses layer 8, but not linear amplification Duan Ze is through shortening the mutual effect loop to suppress the autoexcitation vibration.
The inwall of linear amplification section 1 applies distribution losses layer 8 and is made with graphite material usually.In the linear amplification section 1 of strong loss, the cold attenuation rate of the main mould TE01 mould of working is about 7dB/cm (94GHz), can effectively suppress mode of operation and the caused self-oscillation of other competitive modes.Under current running parameter condition, the TE01 mould mutual effect in electronics notes 4 and the linear amplification section 1 can produce the growth rate of about 4.5dB/cm.Therefore, linear amplification section 1 can produce the gain of about 60dB.
The above; Be merely the embodiment among the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with this technological people in the technical scope that the present invention disclosed; Can understand conversion or the replacement expected; All should be encompassed in of the present invention comprising within the scope, therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (5)
1. a dual-mode gyrotron traveling wave tube amplifier is characterized in that having two-stage structure, and first section is the linear amplification section, adopts the waveguide of loss metal-loaded, is operated in low-order mode, and second section is non-linear amplifying sections, adopts the smooth metal waveguide, is operated in higher order mode;
Said linear amplification section, non-linear amplifying sections are the circle metal waveguide, and the linear amplification section adopts loss waveguide inwall to be coated with the distribution losses layer; Linear amplification Duan Yiduan peripheral hardware input coupler axially is provided with electron gun in the linear amplification Duan Yiduan, the electron gun transmitting terminal is inside; The linear amplification section other end and non-linear amplifying sections one end are coaxial affixed; The diameter of non-linear amplifying sections is greater than the diameter of linear amplification section; There is a ring-shaped step joint, is covered with concentrated attenuator on the step surface, and the non-linear amplifying sections other end is connected with tubaeform output coupler; Linear amplification section, non-linear amplifying sections are positioned in the magnetic field that object-line bag or superconduction provide;
Said distribution losses layer is that loss pottery or graphite material are made.
2. dual-mode gyrotron traveling wave tube amplifier as claimed in claim 1; It is characterized in that; Said concentrated attenuator is the coating that attenuating material is made, or the ceramic ring of loss ceramic, or on the wave guide wall of concentrated attenuator, radially slots or the mode of cracking is introduced radiation loss.
3. dual-mode gyrotron traveling wave tube amplifier as claimed in claim 2 is characterized in that, said concentrated attenuator is used for erase amplifier interacting system Waveguide Discontinuities to annotating the harmful effect that the ripple mutual effect causes; For the amplifier of high-average power work, the waveguide outer wall of concentrated attenuator is provided with cooling water channel, to guarantee that the heat that ohmic loss was produced can be conducted fast.
4. dual-mode gyrotron traveling wave tube amplifier as claimed in claim 1; It is characterized in that; Amplifier adopts the pattern of specific corresponding relation to working: the TE01-TE02 pattern is right, and this pattern is to being operated in the TE01 mould of circular waveguide in linear amplifying sections, and non-linear amplifying sections is operated in the TE02 mould.
5. dual-mode gyrotron traveling wave tube amplifier as claimed in claim 4 is characterized in that, said specific corresponding relation is meant in the working frequency range scope of device, and two right patterns of radial position pattern at electron beam place all have akin field distribution; Adopt the right 94GHz amplifier of TE01-TE02 pattern, at the TE01 of linearity range mould, or at the TE02 of non-linear section mould, they all are that circle is symmetrical at the center radius 0.105cm place at electron beam place, and have maximum field intensity.
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| CN2009100878848A CN101930886B (en) | 2009-06-24 | 2009-06-24 | Dual-mode gyrotron traveling wave tube amplifier |
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| CN2009100878848A CN101930886B (en) | 2009-06-24 | 2009-06-24 | Dual-mode gyrotron traveling wave tube amplifier |
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| CN103632904A (en) * | 2013-04-28 | 2014-03-12 | 中国科学院电子学研究所 | Gyrotron collector |
| CN103489745B (en) * | 2013-09-27 | 2016-02-10 | 西南交通大学 | The event-free survival of Radial Electron Beam is produced based on cold cathode |
| CN104091987B (en) * | 2014-07-01 | 2016-07-06 | 中国科学院等离子体物理研究所 | A kind of MW class corrugated waveguide attenuator |
| CN104134834A (en) * | 2014-07-31 | 2014-11-05 | 中国科学院电子学研究所 | Waveguide mode exciting device |
| CN105845532B (en) * | 2016-03-31 | 2017-11-14 | 电子科技大学 | A kind of transversal exiting device of gyrotron traveling wave tube |
| CN113097668B (en) * | 2021-04-08 | 2022-03-25 | 中国科学院合肥物质科学研究院 | C-waveband hundred-kilowatt-level stable high-power water-cooling microwave switcher |
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| CN101308752A (en) * | 2008-06-11 | 2008-11-19 | 电子科技大学 | Common frequency multi-mode multi-stage whirling traveling-wave tube amplifier |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101308752A (en) * | 2008-06-11 | 2008-11-19 | 电子科技大学 | Common frequency multi-mode multi-stage whirling traveling-wave tube amplifier |
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