CN106128914A - A kind of novel gyrotron traveling wave tube input coupler - Google Patents
A kind of novel gyrotron traveling wave tube input coupler Download PDFInfo
- Publication number
- CN106128914A CN106128914A CN201610397238.1A CN201610397238A CN106128914A CN 106128914 A CN106128914 A CN 106128914A CN 201610397238 A CN201610397238 A CN 201610397238A CN 106128914 A CN106128914 A CN 106128914A
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- waveguide
- traveling wave
- wave tube
- coaxial configuration
- rectangular
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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
A kind of novel gyrotron traveling wave tube input coupler of this disclosure of the invention, belongs to microwave, millimetric wave device technical field.Including coaxial configuration, it is respectively arranged at ending circular waveguide and exporting circular waveguide and be arranged at the rectangular input waveguides of coaxial configuration side of coaxial configuration two ends, wherein being provided with several coupling gaps on coaxial configuration inner wire, rectangular input waveguides E face is provided with short circuit branch rectangular waveguide.The present invention, on the basis of tradition gyrotron traveling wave tube, arranges a short circuit branch waveguide in rectangular input waveguides E face.By position and the structural parameters of appropriate design short circuit branch waveguide, it is possible to the effective reflection offsetting input coupler, increase the efficiency of transmission of front end, thus effectively extension inputs bandwidth.
Description
Technical field
The invention belongs to microwave, millimetric wave device technical field, be specifically related to the input coupling of a kind of novel gyrotron traveling wave tube
Device and method for designing thereof.
Background technology
In gyrotron traveling wave tube, the electromagnetic wave of input interacts with electronics for the helical movement, at this moment due to phase
Impact on opinion negative mass effect, electronics note is being transversely formed azimuthal banching, and it is mutual to continue the arrival high frequency of screw forward
Active region falls into decelerating field.In high frequency deceleration field, electronics note portion of energy is changed to radio-frequency field, it is achieved the amplification of radio-frequency field,
Thus obtain High-Power Microwave, millimeter wave at outfan.
Gyrotron traveling wave tube input coupler is a kind of coupling input equipment, and its effect is exported by pre-amplifier micro-
Ripple signal, is the mode of operation in gyrotron traveling wave tube by mode conversion thaumatropy, thus microwave signal input convolution row
Wave duct.When the poor-performing of input coupler, due to gyrotron traveling wave tube high gain characteristics, not only echo can be to pre-amplifier
Cause certain damage, and the low output to gyrotron of the purity of input pattern, efficiency and gain produce the most notable
Impact, serious conditions can make gyrotron traveling wave tube to work.Therefore the optimization to input coupler is the most necessary.Traditional returns
Rotating wave duct input coupler is as it is shown in figure 5, by cut-off circular waveguide, export circular waveguide, coaxial configuration and rectangular input waveguides group
Become, wherein on coaxial configuration inner wire, be provided with several coupling gaps.Input signal TE10 mould inputs from rectangular input waveguides
To coaxial configuration, TE10 pattern is converted into TEmn1 pattern in coaxial cavity, the coupling by coaxial cavity inner wire of the TEmn1 pattern
Gap is input to export in circular waveguide, and pattern is become the TE01 pattern in output circular waveguide by TEmn1 patten transformation simultaneously, thus is
Circular waveguide TE01 pattern needed for gyrotron traveling wave tube offer work.But this structure is generally big in the high-end reflection of frequency band, passes
Defeated rate is low, and then causes narrower bandwidth.Wide band requirement can not be met.
Summary of the invention
In order to eliminate the reflection between tradition gyrotron traveling wave tube input coupler input rectangular waveguide and coaxial cavity, extend defeated
Enter the bandwidth of bonder, increase microwave transmission efficiency.The present invention proposes a kind of novel gyrotron traveling wave tube input coupler, is passing
On the basis of the gyrotron traveling wave tube of system, one short circuit branch waveguide is set in rectangular input waveguides E face.By appropriate design short circuit
The position of branch-waveguide and structural parameters, can effectively offset the reflection of input coupler, increases the efficiency of transmission of front end,
Thus effectively extension inputs bandwidth.
The concrete technical scheme of the present invention is as follows:
A kind of novel gyrotron traveling wave tube input coupler, its structure such as Fig. 1, shown in 2.Including coaxial configuration, it is respectively provided with
Ending circular waveguide and exporting circular waveguide and be arranged at the rectangular input waveguides of coaxial configuration side in coaxial configuration two ends,
Wherein it is provided with several coupling gaps on coaxial configuration inner wire, it is characterised in that: rectangular input waveguides E face is provided with short circuit
Branch's rectangular waveguide.
Rectangular waveguide TE10 mould is entered between the internal and external conductor of coaxial configuration as input signal by rectangular input waveguides,
The TE411 mould that signal mode is transformed in coaxial cavity by rectangular waveguide TE10 mould.Coaxial TE411 mould is through coaxial configuration inner wire
Coupling gap be input to export in circular waveguide, be circular waveguide TE01 mould by mode conversion simultaneously, output circular waveguide is convolution row
TE01 mould input signal required for wave duct offer.
Rectangular waveguide input signal in background technology is when being input to coaxial cavity, owing to the change of version can not keep away
Producing reflection with exempting from so that input coupling efficiency reduces, output, efficiency and the gain of gyrotron are produced the most notable by this
Impact.Being also possible to reduced bandwidth simultaneously, reduce gain flatness in band, serious conditions can make gyrotron traveling wave tube to work.
The present invention, by arranging short circuit branch waveguide at the broadside of rectangular waveguide, utilizes constant amplitude to inversely add principle, makes coaxial reflection
The echo of ripple and rectangle short circuit branch is cancelled out each other, thus reduces the echo from coaxial configuration, reaches Lifting scheme pure
Degree, the beneficial effect of extension bandwidth of operation.
Compared with traditional gyrotron traveling wave tube input coupler, present invention introduces short circuit branch waveguide to absorb input signal
Echo；By adjusting the narrow edge lengths of short circuit branch waveguide, longitudinal length and the distance of distance coaxial cavity, meet reflection
The phase place of the ripple with short circuit branch waveguide of ripple reversely and the condition of equal magnitude, thus by echo absorption, and then realizes work
Make the broadening of frequency band.
Accompanying drawing explanation
Fig. 1 is the front view of the profile of the gyrotron traveling wave tube input coupler that the present invention provides.
Fig. 2 is the top view of the profile of the gyrotron traveling wave tube input coupler that the present invention provides.
Fig. 3 is the principle schematic of the gyrotron traveling wave tube input coupler that the present invention provides.
Fig. 4 is that the novel gyrotron traveling wave tube input coupler that the embodiment of the present invention provides inputs coupling with tradition gyrotron traveling wave tube
The S11 parameter comparison figure that the test of clutch draws.
Fig. 5 is gyrotron traveling wave tube tradition input coupler structure three-dimensional model schematic.
Detailed description of the invention
Below in conjunction with design example and accompanying drawing the present invention is further elaborated.
Present embodiments providing a gyrotron traveling wave tube input coupler being operated in Ku wave band, TE01 mould, its technology refers to
Mark requires as follows:
Main waveguide mode of operation: circular waveguide TE01 mould.
Input signal pattern: rectangular waveguide TE10 mould.
Working frequency range: Ku wave band, i.e. 12.4GHz-18GHz.
Standard rectangular waveguide model: BJ180, broadside size 12.954 millimeters, narrow limit size: 6.477 millimeters.
The gyrotron traveling wave tube input coupler structure that the present embodiment provides as shown in Figure 1 and Figure 2, primary structure and concrete chi
It is very little as follows: 1 is coaxial cavity structure, and its inner wire inside radius is 12.3mm, thickness 0.5mm, and outer conductor inside radius is 16mm,
The a length of 14mm in space between internal and external conductor；2 is cut-off circular waveguide, and radius is 10mm, a length of 10mm；3 is output circle ripple
Leading, inside radius is 12.3mm, a length of 21.88mm；4 is input rectangular waveguide, uses standard rectangular waveguide model BJ180, wide
Limit 12.954mm, narrow limit 6.477mm, length 20.33mm；5 is short circuit branch waveguide, broadside 12.954mm, narrow limit 4mm, length
16mm；6 couple gap, width 0.8mm, length 8mm for inner wire, and the distance upper and lower edge length of coaxial inner conductor is 3mm,
Amounting to 4 coupling gaps, first coupling slot is 45 degree with rectangular input waveguides center angle, and adjacent coupled seam angle is 90
Degree.
If the phase place returning to A point ripple from A point outgoing after coaxial inner conductor reflects isThen
The mirror field E1 produced at coaxial configuration is represented by
The phase place that ripple enters when short circuit branch waveguide returns to A point is set to
Mirror field E2 in short circuit branch waveguide is represented by
Transmission to be made strengthens, and reflection reduces, and needs
E1+E2=0 is (5)
Offset with branch-waveguide outgoing wave to echo, then phase condition is
Amplitude perturbations is
Er1=Er2 is (7)
Wherein,After coaxial inner conductor reflects, the phase place of A point electromagnetic wave, k is returned to for A point outgoingz1Input for rectangle
The propagation constant of waveguide, L1For the distance from A point to coaxial configuration electromagnetic wave propagation, θ is that ripple produces when coaxial configuration reflects
The angle of phase shift, kz2For the propagation constant of short circuit branch waveguide, L2For the length of short circuit branch waveguide, ω is the angle of electromagnetic wave
Frequency.Er1 is the amplitude of the mirror field produced at coaxial configuration, and Er2 is the amplitude of the mirror field in short circuit branch waveguide.
Phase place during A point is returned to for electromagnetic wave entrance short circuit branch waveguide.
Er1 is decided by the most fixed coaxial configuration, can not change.And Er2 is decided by the taking of narrow hem width degree b of short circuited waveguide
Value.Design and can meet the anti-phase requirement of constant amplitude by the value optimizing narrow hem width degree b.
Novel gyrotron traveling wave tube input coupler that this example provides and GENERAL TYPE gyrotron traveling wave tube input coupler anti-
Penetrate coefficient test result as shown in Figure 4；By figure it is known that this novel gyrotron traveling wave tube input coupler is operated in 15GHz
Reflection coefficient in 17.4GHz is more than-8dB, and wherein 2dB band a width of 1.96GHz, traditional structure 2dB carry a width of 1.3GHz, relatively
It is about 50% in traditional structure bandwidth increments；Three dB bandwidth is 2.12GHz, and traditional structure three dB bandwidth is 1.66GHz, relative to biography
System fabric bandwidths increment is about 27.7%.
Claims (1)
1. a novel gyrotron traveling wave tube input coupler, including coaxial configuration, the cut-off that is respectively arranged at coaxial configuration two ends
Circular waveguide and output circular waveguide and be arranged at the rectangular input waveguides of coaxial configuration side, wherein on coaxial configuration inner wire
It is provided with several coupling gaps, it is characterised in that: rectangular input waveguides E face is provided with short circuit branch rectangular waveguide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610397238.1A CN106128914B (en) | 2016-06-07 | 2016-06-07 | A kind of novel gyrotron traveling wave tube input coupler |
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|---|---|---|---|
| CN201610397238.1A CN106128914B (en) | 2016-06-07 | 2016-06-07 | A kind of novel gyrotron traveling wave tube input coupler |
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| Publication Number | Publication Date |
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| CN106128914A true CN106128914A (en) | 2016-11-16 |
| CN106128914B CN106128914B (en) | 2018-08-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111293015A (en) * | 2020-02-20 | 2020-06-16 | 电子科技大学 | Compact type gyrotron traveling wave tube input system |
| CN114360988A (en) * | 2022-01-07 | 2022-04-15 | 电子科技大学 | V-shaped rectangular groove staggered double-grid waveguide slow-wave structure traveling-wave tube |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4282458A (en) * | 1980-03-11 | 1981-08-04 | The United States Of America As Represented By The Secretary Of The Navy | Waveguide mode coupler for use with gyrotron traveling-wave amplifiers |
| CN104051205A (en) * | 2014-06-17 | 2014-09-17 | 电子科技大学 | Novel gyro traveling-wave tube coupling input structure |
| CN105552506A (en) * | 2014-10-30 | 2016-05-04 | 核工业西南物理研究院 | Hole-coupling directional coupler for millimeter-wave-band megawatt microwave parameter measurement |
-
2016
- 2016-06-07 CN CN201610397238.1A patent/CN106128914B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4282458A (en) * | 1980-03-11 | 1981-08-04 | The United States Of America As Represented By The Secretary Of The Navy | Waveguide mode coupler for use with gyrotron traveling-wave amplifiers |
| CN104051205A (en) * | 2014-06-17 | 2014-09-17 | 电子科技大学 | Novel gyro traveling-wave tube coupling input structure |
| CN105552506A (en) * | 2014-10-30 | 2016-05-04 | 核工业西南物理研究院 | Hole-coupling directional coupler for millimeter-wave-band megawatt microwave parameter measurement |
Non-Patent Citations (2)
| Title |
|---|
| 刘国: "G波段带状束返波管及Ku波段带状束行波管高频结构研究", 《中国博士学位论文全文数据库 信息科技辑》 * |
| 徐勇等: "Ka波段TE01模回旋行波管宽带输入耦合器的设计", 《真空科学与技术学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111293015A (en) * | 2020-02-20 | 2020-06-16 | 电子科技大学 | Compact type gyrotron traveling wave tube input system |
| CN111293015B (en) * | 2020-02-20 | 2021-04-30 | 电子科技大学 | Compact type gyrotron traveling wave tube input system |
| CN114360988A (en) * | 2022-01-07 | 2022-04-15 | 电子科技大学 | V-shaped rectangular groove staggered double-grid waveguide slow-wave structure traveling-wave tube |
| CN114360988B (en) * | 2022-01-07 | 2023-04-18 | 电子科技大学 | V-shaped rectangular groove staggered double-grid waveguide slow-wave structure traveling-wave tube |
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| CN106128914B (en) | 2018-08-21 |
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