CN106653523B - A kind of TE1,1The output device of mould gyrotron traveling wave tube - Google Patents
A kind of TE1,1The output device of mould gyrotron traveling wave tube Download PDFInfo
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- CN106653523B CN106653523B CN201611168082.6A CN201611168082A CN106653523B CN 106653523 B CN106653523 B CN 106653523B CN 201611168082 A CN201611168082 A CN 201611168082A CN 106653523 B CN106653523 B CN 106653523B
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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
- H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
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Abstract
The invention discloses a kind of TE1, the output device of 1 mould gyrotron traveling wave tube belongs to the power source technical field in high-power millimeter-wave technology.The structure includes sequentially connected round elliptical waveguide changeover portion, elliptical waveguide section, oval circular waveguide changeover portion and circular waveguide radiator, four inner wall smooth transition and waveguide core line is coaxial.The output device of the present invention can directly export Gaussian beam, external overmoded waveguide mode converter need not be used, broadband, high efficiency and the high-power operation for not only contributing to realize high-power millimeter wave gyral travelling-wave tubes also help densification and the miniaturization of high-power Millimeter Wave Applications system；Linear polarization Gaussian beam can effectively be exported, it is no longer necessary to the devices such as external mode converter, circular polarizer.
Description
Technical field
The invention belongs to the power source technical fields in high-power millimeter-wave technology, and in particular to a kind of direct output line of energy
The gyrotron traveling wave tube transversal exiting device of polarization Gaussian beam.
Background technology
Gyrotron traveling wave tube is a kind of powerful broadband millimeter-wave amplifier, has broadband, high power, high-gain and height
The features such as efficiency, has a wide range of applications market in communication, radar, precise guidance and material processing etc..In convolution traveling wave
During the realization of pipe, spurious resonance (including reflection, operating mode caused by input and output and partial structurtes are by frequency domain
Unstable, backward wave resonance etc.) inhibition be link the most key in design process.TE1,1Basic mode of the mould as circular waveguide, no
The competition of device internal schema is only advantageously reduced, device gain is also advantageously improved, is the common operating mode of gyrotron traveling wave tube.
Output device is the key components of gyrotron traveling wave tube, is had to output power, mode purity and homogeneous tube efficiency
Important influence.In order to realize that efficient, the steady output of electromagnetic energy, output device will inhibit operating mode as much as possible
End reflection.Therefore, the Circular waveguides that output device generally use radius is gradually opened directly connect with collector input terminal,
Energy output is realized in axial direction.It is TE for operating mode1,1It is this traditional axially to export for the gyrotron traveling wave tube of mould
Mode can have following two deficiencies in the application：First, interaction region output is circular polarisation TE1,1Mould is exported through export structure
Afterwards, circularly polarised wave is remained as.Unshapeliness present in transmission link (use of elbow, the inhomogeneities of transmission waveguide) can be led
Phase is caused to change, to deteriorate the axis ratio of wave beam；Second is that TE1,1Mode loss is larger, is unfavorable for transmitting at a distance and directly answer
With.It is thus typically necessary to connection mode converter, circular polarizer after gyrotron, by the working mode change Cheng Shi of gyrotron
The linear polarization Gaussian beam preferably transmitted at a distance.Under high-power output condition, to ensure power capacity, mode converter, circle
The function elements such as polarizer are both needed to use overmoded waveguide structure.This mode converter for crossing mode structure, exists and is also easy to produce parasitism
Pattern, transform length are long, Insertion Loss is big, need cooling disadvantage, are on the one hand unfavorable for giving full play to for gyrotron traveling wave tube performance, separately
On the one hand the complexity of entire transmitter system is also considerably increased.
Invention content
In order to solve TE1,1Output mode existing for mould gyrotron traveling wave tube is unfavorable for directly application and is asked with what is transmitted at a distance
The demand that topic and corresponding high-power millimeter wave Transmission system are difficult to realize high efficiency, densification, miniaturization etc. is asked
Topic, the present invention propose a kind of output device of gyrotron traveling wave tube, can effectively export linear polarization Gaussian beam, it is no longer necessary to external
The devices such as mode converter, circular polarizer.
A kind of output device of gyrotron traveling wave tube proposed by the present invention, including sequentially connected circle-elliptical waveguide changeover portion,
Elliptical waveguide section, ellipse-circular waveguide changeover portion and circular waveguide radiator, four inner wall smooth transition and waveguide core line is coaxial.
The output end of the circle-elliptical waveguide changeover portion connection gyrotron traveling wave tube collector, by the circular polarisation TE of output1,1
Mould resolves into that amplitude is equal, phase differs 90 degree of a pair of of degenerate mode.
The elliptical waveguide section converts the pattern of a polarization direction in degenerate mode to vertical another of direction of an electric field therewith
On one direction, realize that circular polarisation to the conversion of linear polarization, obtains linear polarization TE1,1Mould.
Elliptical waveguide is transitioned into circular waveguide by the ellipse-circular waveguide changeover portion, is realized good with circular waveguide radiator
Matching.
The circular waveguide radiator is by linear polarization TE1,1Mould is converted into Gaussian beam, and the realization pair of the output window by being followed by
Outer output.
Further, the circle-elliptical waveguide changeover portion is the grading structure of inner wall smooth, the size of input terminal and collection
Pole output bore is consistent, and output end bore is consistent with elliptical waveguide section.
Further, the elliptical waveguide section, section radius meet
R (φ)=a0+a1 cos(2φ)。
Wherein, a0For elliptical waveguide mean radius, a1For angular Discontinuous Factors, and (a0-a1)f≥0.8785*108, during f is
Frequency of heart, φ are cross section azimuthal variation amount.
Further, the circle-elliptical waveguide changeover portion is the grading structure of inner wall smooth, the size and receipts of input terminal
Collector output bore is consistent, and output end bore is consistent with elliptical waveguide section.
Further, connect with ellipse-circular waveguide changeover portion one section of the circular waveguide radiator is set as circular waveguide, separately
One section of waveguide trumpet for inner wall smooth, and loudspeaker internal diameter variation pattern can continuously gradually be opened type, first open rear miniature, open-contracting-
Open type etc..
Further, circle-elliptical waveguide changeover portion, elliptical waveguide section, it is ellipse-circular waveguide changeover portion can be combined individually makes
With realization linear polarization TE1,1The output of mould.
Further, circular waveguide radiator can also be used alone, i.e., circular waveguide radiator is directly connected to collector output
The output of circular polarisation Gaussian beam is realized at end.
Further, the material of the output device is copper.
Working principle of the present invention is as follows：The circular polarisation TE exported from gyrotron traveling wave tube collector1,1Mould is successively by circle-
After elliptical waveguide changeover portion, elliptical waveguide section, ellipse-circular waveguide changeover portion, linear polarization TE can be converted to1,1Mould.Into waveguide
After radiator, linear polarization TE1,1Mould is further transformed into the Gaussian beam or HE of linear polarization1,1Mould.Finally through subsequent
Medium window realizes externally output.
The present invention can reach following advantageous effect：
(1) output device designed can directly export Gaussian beam, rather than TE1,1Mould advantageously reduces setting for output window
Difficulty is counted, the delivery efficiency of gyrotron is improved.
(2) by being designed to output device, the size and location with a tight waist of output Gaussian beam are can control, conveniently with after
The connection of continuous high power millimeter wave link.
(3) output device designed can export line polarization wave rather than circularly polarised wave, it is not necessary to worry that transmission link is uneven
Phase change caused by property, advantageously reduces processing and installation requirement.
(4) output device designed can directly export Gaussian beam, need not use external overmoded waveguide mode converter,
Broadband, high efficiency and the high-power operation for not only contributing to realize high-power millimeter wave gyral travelling-wave tubes, also help big work(
The densification of rate Millimeter Wave Applications system and miniaturization.
Description of the drawings
Fig. 1 is the overall structure figure of the present invention；
Fig. 2 is the stationary wave characteristic of output device；
Fig. 3 is output field distribution of the output device when frequency is f=31GHz；
Fig. 4 is output field distribution of the output device when frequency is f=35GHz；
Fig. 5 is output field distribution of the output device when frequency is f=37GHz.
In figure：1 it is circle-elliptical waveguide changeover portion, 2 be elliptical waveguide section, 3 is ellipse-circular waveguide changeover portion, 4 waveguide spokes
Emitter.
Specific implementation mode
The present invention is described in further detail with reference to example.
Referring to Fig. 1, by taking the transversal exiting device of Ku wave band gyrotron traveling wave tubes as an example.The output device material is copper, is belonged to
Internally-arranged type component, in vacuum environment of the integral installation in gyrotron, by circle-elliptical waveguide changeover portion, elliptical waveguide section, ellipse
Circle-circular waveguide changeover portion and circular waveguide radiator segments composition.This four parts are sequentially connected and inner cavity seamlessly transits.
Circle-elliptical waveguide changeover portion is the waveguide of inner wall smooth, and circular waveguide inner wall radius is 7.7mm, ellipse garden waveguide radius
For 7.7mm, angular Discontinuous Factors are 0.27mm, transition segment length 13.5mm.Circle-elliptical waveguide changeover portion is as feed input knot
Structure connects with the collector of gyrotron, by the circular polarisation TE of output1,1Mould resolves into that amplitude is equal, phase differs 90 degree a pair
Degenerate mode.
Elliptical waveguide section is regular elliptical waveguide, long axis 7.97mm, short axle 7.43mm, length 50.5mm.It is oval
The vertical degenerate mode of the direction of an electric field of generation is single linear polarization pattern by waveguide segment, realizes conversion of the circular polarisation to linear polarization.
The entrance opening dimension of ellipse-circular waveguide changeover portion is regular elliptical waveguide size, and output end is that radius 7.7mm justifies wave
It leads, a length of 13.5mm of the changeover portion.
Connect with ellipse-circular waveguide changeover portion one section of circular waveguide radiator is set as circular waveguide, and circular waveguide length is
10mm；Another section is opened type waveguide trumpet for-contracting-of inner wall smooth, and input terminal radius is 7.7mm, and output end radius is 16mm,
Length is 49.44mm；The ingredient and coupling amount of waveguide mode can be controlled by optimization design horn diaphragm inner wall curve, to
Adjust beam angle, the minor level gain of radiator.
Entire output device total length is 135.94mm, only 6.3 times of the corresponding operation wavelength of center frequency point, and structure is tight
It gathers.
Referring to Fig. 2, in the frequency range of 13GHz-17GHz, the transversal exiting device of ku wave band gyrotron traveling wave tubes it is anti-
It penetrates and is below 20dB.Referring to Fig. 3-5, in the range of frequency is 13-17GHz, the lateral output dress of Ka wave band gyrotron traveling wave tubes
The radiation field set has good symmetry, shows that output field is distributed as Gaussian beam.
It is exported high-power millimeter wave linear polarization Gaussian beam on this structure application gyrotron traveling wave tube, is realized.
As the important component of high-power gyrotron traveling wave tube, efficiency for homogeneous tube of the performance of output device, gain
And subsequent transmission application has a major impact.The gyrotron traveling wave tube output device that the present invention designs can be in broadband directly
Linear polarization Gaussian beam is exported, no longer needs the function elements such as use pattern converter, circular polarizer in practical applications, not only
The efficiency for being conducive to improve high-power millimeter-wave systems, also helps the compact designed of high-power millimeter-wave systems.
Claims (8)
1. a kind of output device of gyrotron traveling wave tube, including it is sequentially connected circle-elliptical waveguide changeover portion, elliptical waveguide section, ellipse
Circle-circular waveguide changeover portion and circular waveguide radiator, four inner wall smooth transition and waveguide core line is coaxial；
The output end of the circle-elliptical waveguide changeover portion connection gyrotron traveling wave tube collector, by the circular polarisation TE of output1,1Mould point
Solution is equal at amplitude, phase differs 90 degree of a pair of of degenerate mode；
The elliptical waveguide section converts the pattern of a polarization direction in degenerate mode to the vertical another party of direction of an electric field therewith
Upwards, realize that circular polarisation to the conversion of linear polarization, obtains linear polarization TE1,1Mould；
Elliptical waveguide is transitioned into circular waveguide by the ellipse-circular waveguide changeover portion, realizes the matched well with circular waveguide radiator；
The circular waveguide radiator is by linear polarization TE1,1Mould is converted into Gaussian beam, and the realization of the output window by being followed by is externally defeated
Go out.
2. a kind of output device of gyrotron traveling wave tube as described in claim 1, it is characterised in that：The circle-elliptical waveguide mistake
The grading structure that section is inner wall smooth is crossed, the size of input terminal is consistent with collector output bore, output end bore and elliptical wave
It is consistent to lead section.
3. a kind of output device of gyrotron traveling wave tube as described in claim 1, it is characterised in that：The elliptical waveguide section,
Section radius meets
R (φ)=a0+a1cos(2φ)
Wherein, a0For elliptical waveguide mean radius, a1For angular Discontinuous Factors, and (a0-a1)f≥0.8785*108, frequency centered on f
Rate, φ are cross section azimuthal variation amount.
4. a kind of output device of gyrotron traveling wave tube as described in claim 1, it is characterised in that：The circular waveguide radiator with
One section of ellipse-circular waveguide changeover portion connection is set as circular waveguide, another section of waveguide trumpet for inner wall smooth.
5. a kind of output device of gyrotron traveling wave tube as claimed in claim 4, it is characterised in that：Waveguide trumpet internal diameter variation side
Formula is continuously gradually to open type or first open rear miniature.
6. a kind of output device of gyrotron traveling wave tube as described in claim 1, it is characterised in that：By the transition of circle-elliptical waveguide
Section, elliptical waveguide section, ellipse-circular waveguide changeover portion are individually applied in combination, and realize linear polarization TE1,1The output of mould.
7. a kind of output device of gyrotron traveling wave tube as claimed in claim 4, it is characterised in that：Circular waveguide radiator is independent
It uses, i.e., circular waveguide radiator is directly connected to collector output end, realizes the output of circular polarisation Gaussian beam.
8. a kind of output device of gyrotron traveling wave tube as described in claim 1, it is characterised in that：The material of the output device
For copper.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611168082.6A CN106653523B (en) | 2016-12-16 | 2016-12-16 | A kind of TE1,1The output device of mould gyrotron traveling wave tube |
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| CN201611168082.6A CN106653523B (en) | 2016-12-16 | 2016-12-16 | A kind of TE1,1The output device of mould gyrotron traveling wave tube |
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| CN106653523A CN106653523A (en) | 2017-05-10 |
| CN106653523B true CN106653523B (en) | 2018-08-21 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634296B (en) * | 2017-09-01 | 2019-12-06 | 西北核技术研究所 | High-power microwave TE11 modular polarization rotation synthesizer and polarization rotation synthesis method |
| CN108682930B (en) * | 2018-04-24 | 2024-03-26 | 中天射频电缆有限公司 | Terminating waveguide transition device |
| CN109241638B (en) * | 2018-09-14 | 2020-05-19 | 电子科技大学 | Method for designing collecting profile of gyrotron collector, gyrotron collector and gyrotron |
| CN111144050B (en) * | 2019-12-30 | 2022-03-15 | 电子科技大学 | Design method of strip traveling wave tube slow wave structure working in high-order mode |
| CN111755300B (en) * | 2020-07-02 | 2022-03-15 | 电子科技大学 | High-frequency structure of broadband gyrotron traveling wave tube |
| CN112864547B (en) * | 2021-01-14 | 2023-08-04 | 成都航天智向安防科技有限公司 | A accurate optical mode converter of miniaturized broadband for W wave band EIO |
| CN113839219B (en) * | 2021-08-31 | 2022-10-14 | 电子科技大学 | Design method of broadband high-power circular polarizer |
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|---|---|---|---|---|
| CN102377000A (en) * | 2010-08-11 | 2012-03-14 | 中国科学院电子学研究所 | High-frequency conversion structure with rectangular-circular mode |
| CN105280462A (en) * | 2015-11-06 | 2016-01-27 | 西北核技术研究所 | Relativistic backward wave oscillator for generating linearly polarized TE11 mode directly |
| CN105845532A (en) * | 2016-03-31 | 2016-08-10 | 电子科技大学 | Lateral output device for wave gyro traveling wave tube |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03236602A (en) * | 1990-02-14 | 1991-10-22 | Fujitsu General Ltd | Circularly polarized wave/linearly polarized wave converter |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377000A (en) * | 2010-08-11 | 2012-03-14 | 中国科学院电子学研究所 | High-frequency conversion structure with rectangular-circular mode |
| CN105280462A (en) * | 2015-11-06 | 2016-01-27 | 西北核技术研究所 | Relativistic backward wave oscillator for generating linearly polarized TE11 mode directly |
| CN105845532A (en) * | 2016-03-31 | 2016-08-10 | 电子科技大学 | Lateral output device for wave gyro traveling wave tube |
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