CN112863976A - Electrical performance design method for helical line slow-wave circuit of L-band 500W space traveling wave tube - Google Patents
Electrical performance design method for helical line slow-wave circuit of L-band 500W space traveling wave tube Download PDFInfo
- Publication number
- CN112863976A CN112863976A CN202110038231.1A CN202110038231A CN112863976A CN 112863976 A CN112863976 A CN 112863976A CN 202110038231 A CN202110038231 A CN 202110038231A CN 112863976 A CN112863976 A CN 112863976A
- Authority
- CN
- China
- Prior art keywords
- pitch
- section
- wave
- band
- electron beam
- 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.)
- Granted
Links
- 238000013461 design Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000010894 electron beam technology Methods 0.000 claims abstract description 24
- 230000001360 synchronised effect Effects 0.000 claims abstract description 18
- 230000010349 pulsation Effects 0.000 claims abstract description 7
- 239000011295 pitch Substances 0.000 claims description 69
- 238000004364 calculation method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 4
- 230000010363 phase shift Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012938 design process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
- H01J23/24—Slow-wave structures, e.g. delay systems
- H01J23/26—Helical slow-wave structures; Adjustment therefor
- H01J23/27—Helix-derived slow-wave structures
-
- 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
- H01J23/34—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
Landscapes
- Microwave Amplifiers (AREA)
Abstract
The invention discloses an electrical performance design method of a helix slow wave circuit of an L-band 500W space traveling wave tube, which relates to the technical field of slow wave circuits and specifically comprises the following steps: in the input modulation section, the electron beam is well modulated by adopting a gradual change pitch, and an alternating current component is formed to reduce group delay fluctuation; in the output spiral line bunching section, a pulse type pitch combination structure is adopted, alternating current with higher amplitude is formed along with the gradual enhancement of electron beam bunching, and harmonic waves are inhibited to increase the amplitude of fundamental waves; in the synchronous section of the output spiral line, a double negative hopping structure is adopted, the phase speed of the line wave is reduced to maintain the synchronous relation between the injected waves, so that the line wave is amplified, and the continuous increase of the fundamental wave current is further ensured; and in the energy exchange section of the output spiral line, the screw pitch is increased at the tail end, so that the intermodulation component can be effectively reduced, the defocusing of the electron beam is reduced, and the pulsation of the electron beam is further ensured. The traveling wave tube has the high efficiency characteristic of the currently used navigation product, and further innovates the slow wave structural design, thereby solving the problems of large group delay distortion, large second harmonic and large third-order intermodulation component which influence the navigation precision.
Description
Technical Field
The invention relates to the technical field of slow wave circuits, in particular to a spiral line slow wave circuit of an L-waveband 500W space traveling wave tube for a navigation satellite.
Background
The L-band space traveling wave tube is a core device of a Beidou navigation satellite system in China and is used for a transponder subsystem as a microwave power final-stage amplifier. The L-band 135W space traveling wave tube is used on the current satellite.
With the development of foreign GPS-III navigation systems, Galileo satellite navigation systems and new generation Beidou navigation systems in China, the influence of signal power enhancement on the quality of other navigation signals is analyzed from two aspects of frequency spectrum overlapping and equivalent carrier-to-noise ratio of received signals, and the analysis result shows that the anti-interference performance of the enhanced signals can be obviously improved when the signal enhancement amplitude is within 20 dB. And the increase in signal amplitude depends largely on the increase in output power of the traveling wave tube.
Therefore, a new generation of Beidou navigation satellite system provides clear requirements for higher power output performance of the L-waveband space traveling wave tube, and the electrical performance design structure of the spiral line slow wave circuit is particularly important.
Disclosure of Invention
The invention aims to solve the technical problem of designing an L-wave-band 500W space traveling wave tube helix slow-wave circuit for a navigation satellite aiming at the electrical performance of the helix slow-wave circuit with high power and low nonlinear distortion of the L-wave-band 500W space traveling wave tube in the background technology, the traveling wave tube not only has the high efficiency characteristic of the currently used navigation product, but also further innovates the slow-wave structural design, and solves the problems of large group delay distortion, large second harmonic and large third-order intermodulation component which influence the navigation precision.
The invention adopts the following technical scheme for solving the technical problems:
the utility model provides a L wave band 500W space travelling wave tube helix slow wave circuit electrical property design method, specifically contains input modulation section, output helix cluster section, output helix synchronous section, output helix energy exchange section, specifically contains the following step:
step 1, in an input modulation section, adopting a gradient pitch to well modulate an electron beam to form an alternating current component to reduce group delay fluctuation;
step 2, in the output spiral line bunching section, a pulse type pitch combination structure is adopted, alternating current with higher amplitude is formed along with the gradual enhancement of electron beam bunching, and harmonic waves are inhibited to increase the amplitude of fundamental waves;
step 3, in the synchronous section of the output spiral line, a double negative hopping structure is adopted, the phase velocity of the line wave is reduced to maintain the synchronous relation between the injected waves, the line wave is amplified, and the continuous increase of the fundamental current is further ensured;
and 4, increasing the pitch at the tail of the output spiral line energy exchange section, so that the intermodulation component can be effectively reduced, the defocusing of the electron beam can be reduced, and the pulsation of the electron beam can be further ensured.
As a further preferable scheme of the electrical performance design method of the L-band 500W space traveling wave tube helix slow-wave circuit, the synchronous voltage of the slow-wave circuit is selected to be 4700V, and the total current is 255 mA;
as a further preferable scheme of the electrical property design method of the helical line slow-wave circuit of the L-band 500W space traveling wave tube, in an input modulation section, the electrical property is gradually changed from a pitch p1 to a pitch p2, wherein p1=1.71mm, p2=1.85mm, the total length of the input modulation section is 182.5mm, the corresponding length of the pitch p1 is 68mm, the corresponding length of the pitch p2 is 73.5mm, and the length of the gradual change section is 41 mm.
As a further preferable scheme of the electrical performance design method of the helical line slow-wave circuit of the L-band 500W space traveling wave tube, the output clustering section comprises a pitch p3, a pitch p4 and a pitch p5, wherein p3=1.99mm, p4=1.88mm, p5=2.06mm, wherein the pitch of the first section of p3 is 104.5mm, the pitch of the second section is 5mm, the pitch of the first section of p4 is 20mm, the pitch of the second section is 13mm, and the pitch of the p5 section is 63 mm.
As a further preferable scheme of the electrical performance design method of the helical line slow-wave circuit of the L-band 500W space traveling wave tube, the output synchronous segment comprises a pitch p5, a pitch p6 and a pitch p7, wherein p6=1.85mm, p7=1.68mm, and the lengths of the two gradient segments are 12.9mm and 18mm respectively.
As a further preferable scheme of the electrical performance design method of the helical line slow-wave circuit of the L-band 500W space traveling wave tube, the output energy exchange section comprises a pitch p7 and a pitch p8, wherein p7=1.68mm, p8=2.1mm, and the corresponding lengths of the two pitches are 20mm and 2.1mm respectively.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
1. compared with the maximum power level of a navigation product currently used, the L-waveband 500W space traveling wave tube has obvious advantages, is the highest level of the space traveling wave tube for the navigation satellite developed at present, and has great research significance;
2. the traveling wave tube has the high efficiency characteristic of the currently used navigation product, and also further innovates the slow wave structural design, thereby solving the problems of large group delay distortion, large second harmonic and large third-order intermodulation component which influence the navigation precision;
3. particularly, a pulse type pitch combined structure is innovatively adopted to convert harmonic waves into fundamental waves, so that the harmonic waves are suppressed, the electronic efficiency is improved, meanwhile, the large pitch adopted at the tail end of an output spiral line can effectively reduce intermodulation components and defocus of an electron beam, and the small pulsation of the electron beam is ensured;
4. according to the design method of the slow wave circuit, the output power is larger than 600W, the electronic efficiency is larger than 50%, the second harmonic is lower than-30 dB, the group delay fluctuation is within 0.8ns, the phase shift of a saturation point is smaller than 40 degrees, and the third-order intermodulation is larger than 10.5dB when the input backspacing is 3 dB.
Drawings
FIG. 1 is a schematic diagram of the design method of the novel slow wave circuit of the present invention.
FIG. 2 is a schematic diagram of the pitch profile of the novel slow wave circuit of the present invention;
FIG. 3 is a schematic diagram of the distribution of slow wave circuits in the MTSS software according to the present invention;
FIG. 4 is a graph illustrating the output power calculation of the present invention;
FIG. 5 is a graph showing the results of the electron efficiency calculations of the present invention;
FIG. 6 is a graph illustrating the results of gain calculations according to the present invention;
FIG. 7 is a diagram illustrating the phase shift calculation results of the present invention;
FIG. 8 is a schematic diagram of the second harmonic calculation of the present invention;
FIG. 9 is a diagram illustrating the group delay variation calculation results of the present invention;
FIG. 10 is a diagram illustrating the results of the novel third-order intermodulation calculation.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to research the electrical property design of a spiral line slow-wave circuit with high power and low nonlinear distortion of an L-wave-band 500W space traveling wave tube, obtain a design scheme through theoretical analysis and CAD simulation design, lay a foundation for the development of the L-wave-band 500W space traveling wave tube, and finally improve the index of a new generation of Beidou navigation satellite system.
Selecting proper voltage and current, and adopting a gradient pitch in an input modulation section to well modulate the electron beam to form alternating current components to reduce group delay fluctuation; the output spiral line bunching section innovatively adopts a pulse type pitch combined structure, forms alternating current with higher amplitude along with the gradual enhancement of electron beam bunching, and simultaneously performs differential modulation to inhibit harmonic waves and increase the amplitude of fundamental waves; the output helix line synchronous section adopts a double negative hopping structure, further reduces the phase velocity of line waves to maintain the synchronous relation between the injected waves, amplifies the line waves, and ensures that the fundamental current is continuously increased; the screw pitch is increased at the tail of the energy exchange section of the output spiral line, so that the intermodulation component can be effectively reduced, the defocusing of the electron beam is reduced, and the pulsation of the electron beam is ensured.
Compared with the maximum power level of a navigation product currently used, the L-waveband 500W space traveling wave tube has obvious advantages, is the highest level of the currently developed space traveling wave tube for the navigation satellite, and has great research significance. The traveling wave tube has the high efficiency characteristic of the currently used navigation product, and further innovates the slow wave structural design, thereby solving the problems of large group delay distortion, large second harmonic and large third-order intermodulation component which influence the navigation precision. Particularly, the pulse type pitch combined structure is innovatively adopted to convert harmonic waves into fundamental waves, harmonic waves are restrained, electronic efficiency is improved, and meanwhile, the large pitch adopted at the tail end of the output spiral line can effectively reduce intermodulation components and defocus of the electron beam, so that small pulsation of the electron beam is guaranteed.
In the design process of a slow wave circuit of an L-waveband 500W space traveling wave tube, the high-efficiency 500W output power of a fundamental wave signal is required to be realized, and meanwhile, nonlinear distortions such as second harmonic and intermodulation component are restrained, so that the requirement of high navigation precision of a satellite is met. Under the high-power requirement, the requirements of high efficiency and low linear distortion need to adopt a novel slow wave circuit gradual change, jump and difference modulation combined structure and a design method.
The slow wave circuit comprises a pipe shell, a clamping rod, a spiral line, an input energy transmission line and an output energy transmission line; the spiral line is assembled in the pipe shell through clamping rods with uniform intervals outside, the input energy transmission is connected with the left end of the pipe shell, and the output energy transmission is connected with the right end of the pipe shell;
the design method of the novel slow wave circuit is shown in the schematic diagram 1 as follows. The utility model provides a L wave band 500W space travelling wave tube helix slow wave circuit electrical property design method, specifically contains input modulation section, output helix cluster section, output helix synchronous section, output helix energy exchange section, specifically contains the following step:
different from the traditional spiral line space traveling wave tube gradual change structure, the slow wave circuit design method has the following characteristics:
step 1, in an input modulation section, adopting a gradient pitch to well modulate an electron beam to form an alternating current component to reduce group delay fluctuation;
step 2, in the output spiral line bunching section, a pulse type pitch combination structure is adopted, alternating current with higher amplitude is formed along with the gradual enhancement of electron beam bunching, and harmonic waves are inhibited to increase the amplitude of fundamental waves;
step 3, in the synchronous section of the output spiral line, a double negative hopping structure is adopted, the phase velocity of the line wave is reduced to maintain the synchronous relation between the injected waves, the line wave is amplified, and the continuous increase of the fundamental current is further ensured;
and 4, increasing the pitch at the tail of the output spiral line energy exchange section, so that the intermodulation component can be effectively reduced, the defocusing of the electron beam can be reduced, and the pulsation of the electron beam can be further ensured.
The synchronous voltage of the slow wave circuit is selected to be 4700V, and the total current is 255 mA;
in the input modulation section, the pitch p1 is gradually changed to the pitch p2, wherein p1=1.71mm, p2=1.85mm, the total length of the input modulation section is 182.5mm, the pitch of the p1 section corresponds to the length of 68mm, the pitch of the p2 section corresponds to the length of 73.5mm, and the length of the gradual change section is 41 mm.
And the output clustering section comprises a pitch p3, a pitch p4 and a pitch p5, wherein p3=1.99mm, p4=1.88mm and p5=2.06mm, the pitch of the p3 first section corresponds to a length of 104.5mm, the pitch of the p4 second section corresponds to a length of 20mm, the pitch of the p3 second section corresponds to a length of 13mm, and the pitch of the p5 section corresponds to a length of 63 mm.
In the output synchronous segment, a pitch p5, a pitch p6 and a pitch p7 are included, wherein p6=1.85mm, p7=1.68mm, and the lengths of the two gradual sections are respectively 12.9mm and 18 mm.
In the output energy exchange section, a pitch p7 and a pitch p8 are included, wherein p7=1.68mm, p8=2.1mm, and the corresponding lengths of the two pitches are 20mm and 2.1mm respectively.
The calculation results of various parameters obtained by the slow wave circuit design method of the present invention using MTSS software are shown in fig. 4 to 10.
In summary, by adopting the design method of the slow wave circuit, the output power is larger than 600W, the electronic efficiency is larger than 50%, the second harmonic is lower than-30 dB, the group delay fluctuation is within 0.8ns, the phase shift of the saturation point is smaller than 40 degrees, and the third-order intermodulation is larger than 10.5dB when the input backspacing is 3 dB.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention. While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (6)
1. An electrical property design method for a helix line slow-wave circuit of an L-band 500W space traveling wave tube is characterized by comprising the following steps: the method specifically comprises an input modulation section, an output spiral clustering section, an output spiral synchronization section and an output spiral energy exchange section, and specifically comprises the following steps:
step 1, in an input modulation section, adopting a gradient pitch to well modulate an electron beam to form an alternating current component to reduce group delay fluctuation;
step 2, in the output spiral line bunching section, a pulse type pitch combination structure is adopted, alternating current with higher amplitude is formed along with the gradual enhancement of electron beam bunching, and harmonic waves are inhibited to increase the amplitude of fundamental waves;
step 3, in the synchronous section of the output spiral line, a double negative hopping structure is adopted, the phase velocity of the line wave is reduced to maintain the synchronous relation between the injected waves, the line wave is amplified, and the continuous increase of the fundamental current is further ensured;
and 4, increasing the pitch at the tail of the output spiral line energy exchange section, so that the intermodulation component can be effectively reduced, the defocusing of the electron beam can be reduced, and the pulsation of the electron beam can be further ensured.
2. The electrical performance design method of the helical line slow-wave circuit of the L-band 500W space traveling wave tube according to claim 1, characterized in that: the synchronous voltage of the slow wave circuit is selected to be 4700V, and the total current is 255 mA.
3. The electrical performance design method of the helical line slow-wave circuit of the L-band 500W space traveling wave tube according to claim 1, characterized in that: in the input modulation section, the pitch p1 is gradually changed to the pitch p2, wherein p1=1.71mm, p2=1.85mm, the total length of the input modulation section is 182.5mm, the pitch of the p1 section corresponds to the length of 68mm, the pitch of the p2 section corresponds to the length of 73.5mm, and the length of the gradual change section is 41 mm.
4. The electrical performance design method of the helical line slow-wave circuit of the L-band 500W space traveling wave tube according to claim 1, characterized in that: and the output clustering section comprises a pitch p3, a pitch p4 and a pitch p5, wherein p3=1.99mm, p4=1.88mm and p5=2.06mm, the pitch of the p3 first section corresponds to a length of 104.5mm, the pitch of the p4 second section corresponds to a length of 20mm, the pitch of the p3 second section corresponds to a length of 13mm, and the pitch of the p5 section corresponds to a length of 63 mm.
5. The electrical performance design method of the helical line slow-wave circuit of the L-band 500W space traveling wave tube according to claim 1, characterized in that: in the output synchronous segment, a pitch p5, a pitch p6 and a pitch p7 are included, wherein p6=1.85mm, p7=1.68mm, and the lengths of the two gradual sections are respectively 12.9mm and 18 mm.
6. The electrical performance design method of the helical line slow-wave circuit of the L-band 500W space traveling wave tube according to claim 1, characterized in that: in the output energy exchange section, a pitch p7 and a pitch p8 are included, wherein p7=1.68mm, p8=2.1mm, and the corresponding lengths of the two pitches are 20mm and 2.1mm respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110038231.1A CN112863976B (en) | 2021-01-12 | 2021-01-12 | Design method for electrical performance of spiral slow-wave circuit of L-band 500W space traveling wave tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110038231.1A CN112863976B (en) | 2021-01-12 | 2021-01-12 | Design method for electrical performance of spiral slow-wave circuit of L-band 500W space traveling wave tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112863976A true CN112863976A (en) | 2021-05-28 |
| CN112863976B CN112863976B (en) | 2024-02-06 |
Family
ID=76002964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110038231.1A Active CN112863976B (en) | 2021-01-12 | 2021-01-12 | Design method for electrical performance of spiral slow-wave circuit of L-band 500W space traveling wave tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112863976B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113690118A (en) * | 2021-07-29 | 2021-11-23 | 电子科技大学 | Novel helix slow wave structure with variable pitch and variable inner diameter |
| CN114520135A (en) * | 2021-12-31 | 2022-05-20 | 中国电子科技集团公司第十二研究所 | Design method for restraining harmonic waves of spiral line type traveling wave tube |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR969886A (en) * | 1948-07-23 | 1950-12-27 | Csf | Progressing wave tubes improvements |
| US4378512A (en) * | 1979-08-08 | 1983-03-29 | Nippon Electric Co., Ltd. | Helix type traveling wave tube |
| JPS5864737A (en) * | 1981-10-12 | 1983-04-18 | Nec Corp | Traveling-wave tube |
| JPH05225922A (en) * | 1992-02-12 | 1993-09-03 | Nec Corp | Helix type travelling-wave tube |
| CN102054645A (en) * | 2010-12-10 | 2011-05-11 | 安徽华东光电技术研究所 | Wideband traveling wave tube slow wave system and fabrication method thereof |
-
2021
- 2021-01-12 CN CN202110038231.1A patent/CN112863976B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR969886A (en) * | 1948-07-23 | 1950-12-27 | Csf | Progressing wave tubes improvements |
| US4378512A (en) * | 1979-08-08 | 1983-03-29 | Nippon Electric Co., Ltd. | Helix type traveling wave tube |
| JPS5864737A (en) * | 1981-10-12 | 1983-04-18 | Nec Corp | Traveling-wave tube |
| JPH05225922A (en) * | 1992-02-12 | 1993-09-03 | Nec Corp | Helix type travelling-wave tube |
| CN102054645A (en) * | 2010-12-10 | 2011-05-11 | 安徽华东光电技术研究所 | Wideband traveling wave tube slow wave system and fabrication method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113690118A (en) * | 2021-07-29 | 2021-11-23 | 电子科技大学 | Novel helix slow wave structure with variable pitch and variable inner diameter |
| CN114520135A (en) * | 2021-12-31 | 2022-05-20 | 中国电子科技集团公司第十二研究所 | Design method for restraining harmonic waves of spiral line type traveling wave tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112863976B (en) | 2024-02-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112863976B (en) | Design method for electrical performance of spiral slow-wave circuit of L-band 500W space traveling wave tube | |
| CN206697441U (en) | The slow-wave structure and its high-frequency structure of helix TWT comprising more transitions | |
| CN105304438A (en) | Secondary harmonic inhibition method for broadband helix travelling wave tube | |
| CN113113279B (en) | Cosine grid loading sine-like waveguide slow wave structure | |
| CN107452582B (en) | Broadband folding waveguide traveling wave tube capable of suppressing harmonic waves | |
| CN103489741B (en) | A kind of helix TWT dynamic phase velocity gradient pitch distributed architecture and method for designing | |
| CN108987221A (en) | A kind of staggeredly grid slow-wave structure of rectangular metal column load | |
| CN109119310B (en) | Slow wave structure suitable for double-band-shaped injection backward wave oscillator | |
| CN101728183B (en) | Slow wave structure used for X-waveband space travelling wave tube | |
| CN113690118B (en) | Novel helix slow wave structure with variable pitch and variable inner diameter | |
| CN204885078U (en) | Slow wave structure who restraines helix TWT harmonic | |
| CN111414704A (en) | Design method of focusing magnetic field for inhibiting dynamic defocusing of high-efficiency traveling wave tube | |
| CN102723250B (en) | Pitch hopping type spiral line for slow wave system of traveling wave tube | |
| CN113838727B (en) | Miniaturized high-power klystron based on single-ridge CeSRR unit | |
| Feng et al. | A novel design of G-band broadband low-gain fluctuation slow-wave structure with improved folded waveguides | |
| CN212907637U (en) | Slow wave circuit of helix traveling wave tube | |
| CN104183444A (en) | Folding waveguide slow-wave structure provided with electron beam channel with progressively decreasing internal diameter dimension | |
| CN115270682A (en) | Ka-band broadband space traveling wave tube low-gain fluctuation design method | |
| CN109712854A (en) | A kind of the inhibition group delay distortion helix and design method of space travelling wave tube | |
| CN110767518A (en) | Long-life, high-efficiency and low-distortion L-waveband space traveling wave tube for navigation satellite | |
| CN115565834A (en) | Multi-mode working traveling wave tube with adjustable power | |
| CN117832039A (en) | Slow wave structure capable of realizing electronic phase positive jump, traveling wave tube and method | |
| Wang et al. | A Multi-Tapered Pitch Distribution Structure of Helix TWT | |
| Li et al. | W-Band 30W Continuous Wave wide band Folded Waveguide TWT | |
| Wang et al. | Q-band Helix Traveling-Wave Tube for the Next Generation Wireless Communications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |