CN106128914B - 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
- CN106128914B CN106128914B CN201610397238.1A CN201610397238A CN106128914B CN 106128914 B CN106128914 B CN 106128914B CN 201610397238 A CN201610397238 A CN 201610397238A CN 106128914 B CN106128914 B CN 106128914B
- Authority
- CN
- China
- Prior art keywords
- waveguide
- coaxial configuration
- traveling wave
- short circuit
- wave tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
Landscapes
- Microwave Amplifiers (AREA)
- Gyroscopes (AREA)
Abstract
A kind of novel gyrotron traveling wave tube input coupler of the disclosure of the invention, belongs to microwave, millimetric wave device technical field.Including coaxial configuration, it is respectively arranged at the cut-off circular waveguide at coaxial configuration both ends and the rectangular input waveguides for exporting circular waveguide and being set to coaxial configuration side, several coupling gaps are wherein provided on coaxial configuration inner wire, the faces rectangular input waveguides E are provided with short circuit branch rectangular waveguide.A short circuit branch waveguide is arranged on the basis of traditional gyrotron traveling wave tube, in the faces rectangular input waveguides E in the present invention.By rationally designing the position and structure parameter of short circuit branch waveguide, the reflection of input coupler can be effectively offset, the efficiency of transmission of front end is increased, to which effectively extension inputs bandwidth.
Description
Technical field
The invention belongs to microwave, millimetric wave device technical fields, and in particular to a kind of novel gyrotron traveling wave tube input coupling
Device and its design method.
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
Influence to opinion negative mass effect, electronics note are 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, which is converted, gives high frequency field, realizes the amplification of high frequency field,
To obtain High-Power Microwave, millimeter wave in output end.
Gyrotron traveling wave tube input coupler is a kind of coupling input device, its effect be pre-amplifier is exported it is micro-
Wave signal is the operating mode in gyrotron traveling wave tube by mode conversion thaumatropy, to which microwave signal is inputted convolution row
Wave duct.When the performance of input coupler is poor, due to gyrotron traveling wave tube high gain characteristics, not only echo can be to pre-amplifier
Certain damage is caused, and the purity of input pattern is low more notable to the output power of gyrotron, efficiency and gain generation
Influence, serious conditions can make gyrotron traveling wave tube that can not work.Therefore very necessary to the optimization of input coupler.Traditional returns
Rotating wave duct input coupler is as shown in figure 5, by cut-off circular waveguide, output circular waveguide, coaxial configuration and rectangular input waveguides group
At, be wherein provided on coaxial configuration inner wire several coupling gap.Input signal TE10 moulds are inputted from rectangular input waveguides
To coaxial configuration, TE10 patterns are converted into TEmn1 patterns, the coupling that TEmn1 patterns pass through coaxial cavity inner conductor in coaxial cavity
Gap be input to output circular waveguide in, while pattern by TEmn1 patterns be converted into output circular waveguide in TE01 patterns, to for
Gyrotron traveling wave tube provides the circular waveguide TE01 patterns needed for work.But this structure is usually big in the high-end reflection of frequency band, passes
Defeated rate is low, and then leads to narrower bandwidth.Wide band requirement cannot be met.
Invention content
In order to eliminate the reflection between traditional gyrotron traveling wave tube input coupler input rectangular waveguide and coaxial cavity, extension is defeated
Enter the bandwidth of coupler, increases 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 the faces rectangular input waveguides E.By rationally designing short circuit
The position and structure parameter of branch-waveguide can effectively offset the reflection of input coupler, increase the efficiency of transmission of front end,
To which effectively extension inputs bandwidth.
Specific technical solution of the present invention is as follows：
A kind of novel gyrotron traveling wave tube input coupler, structure such as Fig. 1, shown in 2.Including coaxial configuration, it is respectively set
In coaxial configuration both ends cut-off circular waveguide and output circular waveguide and be set to the rectangular input waveguides of coaxial configuration side,
Several coupling gaps are wherein provided on coaxial configuration inner wire, it is characterised in that：The faces rectangular input waveguides E are provided with short circuit
Branch's rectangular waveguide.
Between rectangular waveguide TE10 moulds enter the internal and external conductor of coaxial configuration as input signal by rectangular input waveguides,
Signal mode is transformed into the TE411 moulds in coaxial cavity by rectangular waveguide TE10 moulds.Coaxial TE411 moulds pass through coaxial configuration inner wire
Coupling gap be input to output circular waveguide in, while by mode conversion be circular waveguide TE01 moulds, output circular waveguide be convolution go
Wave duct provides required TE01 moulds input signal.
Rectangular waveguide input signal in background technology is when being input to coaxial cavity, since the variation of structure type can not be kept away
Generate reflection with exempting from so that input coupling efficiency reduces, this generates the output power of gyrotron, efficiency and gain more notable
Influence.It is also possible to reduced bandwidth simultaneously, reduces with interior gain flatness, serious conditions can make gyrotron traveling wave tube that can not work.
Short circuit branch waveguide is arranged by the broadside in rectangular waveguide in the present invention, is inversely added principle using constant amplitude, makes coaxial reflection
Wave and the back wave of rectangle short circuit branch are cancelled out each other, and to reduce the back wave from coaxial configuration, it is pure to reach Lifting scheme
Degree, extends the advantageous effect of bandwidth of operation.
Compared with traditional gyrotron traveling wave tube input coupler, present invention introduces short circuit branch waveguides to absorb input signal
Back wave；By adjusting the narrow side length of short circuit branch waveguide, longitudinal length and the distance apart from coaxial cavity, to meet reflection
Wave with the phase of the wave of short circuit branch waveguide reversely and the condition of equal magnitude, to which back wave be absorbed, and then realization work
Make the broadening of frequency band.
Description of the drawings
Fig. 1 is the front view of the sectional view of gyrotron traveling wave tube input coupler provided by the invention.
Fig. 2 is the vertical view of the sectional view of gyrotron traveling wave tube input coupler provided by the invention.
Fig. 3 is the principle schematic of gyrotron traveling wave tube input coupler provided by the invention.
Fig. 4 is that novel gyrotron traveling wave tube input coupler provided in an embodiment of the present invention inputs coupling with traditional gyrotron traveling wave tube
The S11 parameter compares figures that the test of clutch obtains.
Fig. 5 is gyrotron traveling wave tube tradition input coupler structure three-dimensional model schematic.
Specific implementation mode
With reference to design example and attached drawing, the present invention is further elaborated.
A gyrotron traveling wave tube input coupler for being operated in Ku wave bands, TE01 moulds is present embodiments provided, technology refers to
Mark requires as follows：
Main waveguide work pattern：Circular waveguide TE01 moulds.
Input signal pattern：Rectangular waveguide TE10 moulds.
Working frequency range：Ku wave bands, i.e. 12.4GHz-18GHz.
Standard rectangular waveguide model：BJ180,12.954 millimeters of broadside size, narrow side size：6.477 millimeter.
Gyrotron traveling wave tube input coupler structure provided in this embodiment is as shown in Figure 1 and Figure 2, primary structure and specific ruler
It is very little as follows：1 is coaxial cavity configuration, and inner wire inside radius is 12.3mm, and thickness 0.5mm, outer conductor inside radius is 16mm,
The length in gap is 14mm between internal and external conductor；2 be cut-off circular waveguide, radius 10mm, length 10mm；3 be output circle wave
It leads, inside radius 12.3mm, length 21.88mm；4 be input rectangular waveguide, wide using standard rectangular waveguide model BJ180
Side 12.954mm, narrow side 6.477mm, length 20.33mm；5 be short circuit branch waveguide, broadside 12.954mm, narrow side 4mm, length
16mm；6 couple gap for inner wire, and width 0.8mm, length 8mm are 3mm apart from the upper and lower edge length of coaxial inner conductor,
Total 4 couplings gap, first coupling slot and rectangular input waveguides center angle are 45 degree, and it is 90 that adjacent coupled, which stitches angle,
Degree.
If the phase for returning to A point waves after coaxial inner conductor reflects from the outgoing of A points isThen
The mirror field E1 generated at coaxial configuration is represented by
The phase that wave enters when short circuit branch waveguide returns to A points is set as
Mirror field E2 in short circuit branch waveguide is represented by
Transmission is set to enhance, reflection reduces, and needs
E1+E2=0 is (5)
It is offseted with branch-waveguide outgoing wave to back wave, then phase condition is
Amplitude perturbations are
Er1=Er2 is (7)
Wherein,The phase of A point electromagnetic waves, k are returned to after coaxial inner conductor reflects for the outgoing of A pointsz1It is inputted for rectangle
The propagation constant of waveguide, L1For the distance from A points to coaxial configuration Electromagnetic Wave Propagation, θ is that wave is generated when coaxial configuration reflects
Phase shift angle, 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 generated at coaxial configuration, and Er2 is the amplitude of the mirror field in short circuit branch waveguide.
Enter phase when short circuit branch waveguide returns to A points for electromagnetic wave.
Er1 is decided by fixed coaxial configuration, can not change.And Er2 is decided by taking for the narrow side width b of short circuited waveguide
Value.Design can meet the requirement of constant amplitude reverse phase by optimizing the value of narrow side width b.
This example provide novel gyrotron traveling wave tube input coupler and GENERAL TYPE gyrotron traveling wave tube input coupler it is anti-
Penetrating coefficient, test results are shown in figure 4；By figure it is known that the novel gyrotron traveling wave tube input coupler is operated in 15GHz-
Reflectance factor in 17.4GHz is more than -8dB, and wherein 2dB bandwidth is 1.96GHz, and traditional structure 2dB bandwidth is 1.3GHz, relatively
In traditional structure bandwidth increments be about 50%；Three dB bandwidth is 2.12GHz, and traditional structure three dB bandwidth is 1.66GHz, relative to biography
Fabric bandwidths increment of uniting is about 27.7%.
Claims (1)
1. a kind of gyrotron traveling wave tube input coupler, including coaxial configuration, the cut-off circle wave for being respectively arranged at coaxial configuration both ends
The rectangular input waveguides for leading with output circular waveguide and being set to coaxial configuration side, are wherein arranged on coaxial configuration inner wire
There are several to couple gap, it is characterised in that：The faces rectangular input waveguides E are provided with short circuit branch rectangular waveguide, by adjusting short
Narrow side length, longitudinal length and the distance apart from coaxial cavity of road branch-waveguide make back wave and the wave of short circuit branch waveguide
Phase is reversed and equal magnitude, to absorb back wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610397238.1A CN106128914B (en) | 2016-06-07 | 2016-06-07 | A kind of novel gyrotron traveling wave tube input coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610397238.1A CN106128914B (en) | 2016-06-07 | 2016-06-07 | A kind of novel gyrotron traveling wave tube input coupler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106128914A CN106128914A (en) | 2016-11-16 |
| CN106128914B true CN106128914B (en) | 2018-08-21 |
Family
ID=57270163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610397238.1A Active CN106128914B (en) | 2016-06-07 | 2016-06-07 | A kind of novel gyrotron traveling wave tube input coupler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106128914B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111293015B (en) * | 2020-02-20 | 2021-04-30 | 电子科技大学 | Compact type gyrotron traveling wave tube input system |
| 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 |
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 |
|---|
| 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;刘国;《中国博士学位论文全文数据库 信息科技辑》;20160315;正文第103-105页 * |
| Ka波段TE01模回旋行波管宽带输入耦合器的设计;徐勇等;《真空科学与技术学报》;20120331;第32卷(第3期);正文第209页左栏第2段第210页右栏最后一段，图1-3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106128914A (en) | 2016-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7002429B2 (en) | Nonreflective waveguide terminator and waveguide circuit | |
| CN103414001B (en) | A kind of plane merit such as not divides waveguide H-T power division network | |
| CN107946765A (en) | A kind of high-gain Vivaldi array antennas for loading director | |
| JP5566169B2 (en) | Antenna device | |
| CN101237082B (en) | Multi-resistance band and ultra-broadband antenna based on split ring resonancer and mount erosion aperture | |
| CN111969288A (en) | Oblique multipath synthesis gyrotron traveling wave tube TE02Mode input coupler | |
| CN113113279B (en) | Cosine grid loading sine-like waveguide slow wave structure | |
| CN108172962A (en) | A kind of broadband circular waveguide directional coupler for microwave power measurement | |
| CN103904391A (en) | Multi-layer hybrid-mode hexagonal substrate integrated waveguide filter | |
| CN106128914B (en) | A kind of novel gyrotron traveling wave tube input coupler | |
| CN107342446A (en) | Terahertz substrate integration wave-guide microstrip transition structure | |
| CN108550511B (en) | Double-frequency and double-mode gyrotron traveling wave tube input coupler | |
| CN104051205B (en) | Gyrotron traveling wave tube coupling input structure | |
| CN107275738B (en) | Waveguide-microstrip power combiner based on magnetic coupling principle | |
| US9083069B2 (en) | Power combiner/distributor, power amplifying circuit, and wireless apparatus | |
| CN108550510A (en) | A kind of gyrotron traveling wave tube input coupler with high electronic beam current passband | |
| CN103367081A (en) | Wideband output window of convolution devices | |
| CN109994350B (en) | Energy coupling device from H-surface insertion type rectangular waveguide to staggered double gates | |
| CN115458890B (en) | Ridge loading oblique-in type multipath synthesized TE03 mode input coupler | |
| CN112054305A (en) | Periodic leaky-wave antenna based on composite left-right-hand structure and highly stable gain | |
| CN116613545A (en) | Medium type artificial surface plasmon band-pass filtering array antenna | |
| CN113161216B (en) | Compact double-confocal waveguide cyclotron traveling wave tube input coupler | |
| CN110311202A (en) | Broadband ridge waveguide power combiner and power combiner device based on gradual change ridge | |
| CN211556091U (en) | Full-wave-band magic T based on double-sided stepped rectangular waveguide | |
| JP2008079085A (en) | Transmission line waveguide converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |