CN101281851A - Complete waveguide bandwidth standard waveguide output high power helix TWT - Google Patents
Complete waveguide bandwidth standard waveguide output high power helix TWT Download PDFInfo
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- CN101281851A CN101281851A CNA2008100443112A CN200810044311A CN101281851A CN 101281851 A CN101281851 A CN 101281851A CN A2008100443112 A CNA2008100443112 A CN A2008100443112A CN 200810044311 A CN200810044311 A CN 200810044311A CN 101281851 A CN101281851 A CN 101281851A
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Abstract
The invention relates to a full wave guide bandwidth standard wave output high power helical line traveling wave tube, which belongs to a field of microwave electric vacuum device. The high power helical line traveling wave tube includes a tube body, helical line arranged in the tube body, a holding bar, a flat wave guide and a microwave window, the flat wave guide and the helical line are connected by a helical line-ridge wave guide transition structure; the flat wave guide is connected with the microwave window by a flat wave guide-microwave window end joint wave guide transition section; and the microwave window is connected to a output end joint wave guide by a transition wave guide. The advantages of the invention are that output power level of the traveling wave tube is greatly increased in a standard wave guide bandwidth, and matching capability is good.
Description
Technical field
The present invention relates to the wide high-power spiral line row wave tube of a kind of all-wave conduction band, belong to microwave electron tube technical field with standard waveguide output.
Background technology
The HIGH-POWERED MICROWAVES electron tube is the most important devices of modern national defense military equipment such as radar, electronic countermeasures, communication, guidance.Wherein helix TWT enjoys attention with advantages such as its broadband, high dynamic range, the high and low noises of efficient again, is widely used in the various last stage of transmitter power amplifiers.
In some important application, need S-band broadband continuous wave high-power microwave source.For reaching this specification requirement, not only need to improve as far as possible helix TWT single tube power output, and must be synthetic to several single travelling wave tube output carrying out power.At this moment it is wide and the most favourable with the high-power spiral line row wave tube of standard waveguide output that employing possesses the all-wave conduction band.With S-band BJ32 standard waveguide is example, requires to cover the 2.6-3.95GHz frequency range.
The direct waveguide output of prior art data travelling wave tube as shown in Figure 1.The helix slow wave line end is straightened to become and gos deep into the waveguide internal antenna, and it is terminal welded together with a metallic cylinder end points.Metallic cylinder is called the chokes tube, and its outer wall and metallic shield tube inwall form the λ g/4 chokes coaxial line of a terminal open circuit, and it is rendered as a short circuit face on waveguide surface.The waveguide end is provided with short-circuit plunger in order to regulate the output coupling.
But this power output coupler has following shortcoming: 1. the helix end does not directly realize that by metal and shell heat conduction is connected, thereby it is bad to dispel the heat, and power output is limited; 2. the bandwidth adjustment difficulty is difficult to accomplish Broadband Matching.Simultaneously common waveguide symmetry box type window designs and unavoidably occurs the ghosts mode oscillatory occurences in its frequency band, is difficult to obtain broadband output in the high-power applications occasion, and its relative bandwidth generally is no more than 20%.In fact it is investigated the S-band helix TWT that new this standard waveguide also of no use is exported both at home and abroad.
Summary of the invention
Technical problem to be solved by this invention is a kind of S-band helix TWT of development, its output can directly be connected with the BJ32 standard waveguide, bandwidth covers 2.6-3.95GHz (standard waveguide full bandwidth), continuous wave output power is greater than more than the 2kW, in high-power transmitter and power synthetic system.Specifically need a series of technological difficulties of solution such as heat dissipation problem, Broadband Matching, high-power output and homogeneous tube manufacturing process structure integrated.
The technical scheme that the present invention solve the technical problem employing is, complete waveguide bandwidth standard waveguide output high power helix TWT, comprise body with and interior helix, supporting rod, flat waveguide, microwave window, have one helix-ridge waveguide transition structure to connect flat waveguide and helix; Flat waveguide is connected with microwave window by flat waveguide-microwave window termination waveguide transition section; Microwave window is connected to the waveguide of output termination by transition waceguide.
Described helix-ridge waveguide transition structure comprises helix-coaxial line changeover portion, coaxial line-strip line changeover portion and strip line-ridge waveguide changeover portion, from helix-coaxial line changeover portion to strip line-the ridge waveguide transition width increases step by step, simultaneously, the width of the residing waveguide segment of transition structure is also for increasing step by step.Described flat waveguide-microwave window termination waveguide transition section is the step-shaped transition structure.
Described microwave window comprises the waveguide of microwave window termination, circular waveguide section, potsherd, metal to ceramic sealing section and cooling jacket, and the center of output termination waveguide and the center of ceramic window be not on sustained height.The narrow limit height of transition steps waveguide is with stepped increase, the broadside size constancy.Described cooling jacket is the tank that is arranged in the circular waveguide section shell.
The invention has the beneficial effects as follows,
1. directly standard waveguide output provides a kind of high power travelling wave tube technological approaches, comprise the wide no ghosts mode oscillator tank type window setting technique of helix-standard waveguide special matched transition and high-power all-wave conduction band, in the standard waveguide bandwidth, can significantly improve travelling wave tube power output level.
2. adopt S-band standard BJ32 waveguide throwout spiral travelling wave tube sample pipe (2.6GHz-3.95GHz) matching performance in the all-wave conduction band is wide of the technology of the present invention good, the output standing-wave ratio is less than 1.8, (2.5-3.8GHz) power output is greater than 2.5kW in 40% relative bandwidth, and (2.7-3.7GHz) power output is greater than 3.5kW in 31% relative bandwidth scope.
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is a prior art waveguide throwout spiral travelling wave tube export structure longitudinal profile schematic diagram.
Fig. 2 is waveguide throwout spiral travelling wave tube export structure side direction generalized section of the present invention (left figure) and forward generalized section (right figure).
Fig. 3 is a prior art wave guide box type window construction schematic diagram.
Fig. 4 is the wide wave guide box type of an all-wave conduction band of the present invention window construction schematic diagram.
Embodiment
The technology of the present invention main points:
1. the terminal local welding technology of helix has adopted four trapezoidal beryllium oxide ceramics supporting rods (generally adopting three) clamping helix.Inboard and the helix copper strips welding at one section the most serious supporting rod of heating, the oxygen-free copper outer conductor shell welding of the outside and water flowing cooling has realized good thermo-contact, has improved heat dispersion.
2. designed a kind of transition structure of forming by profiled metal bar and distortion wave guide wall, this structure has guaranteed in the all-wave conduction band is wide by helix to standard waveguide mode conversion and impedance matching, its standing-wave ratio 1.26, and the direct metal that has guaranteed helix output and tube wall is welded to connect, thereby guaranteed excellent heat dispersion performance, made microwave property and heat dispersion reach best simultaneously.
3. designed the box type window that the wide no ghosts mode vibration of a kind of high-power all-wave conduction band can be docked with standard waveguide, the design of employing unsymmetric structure, pottery window diameter is less than the standard waveguide broadside, realized no ghosts mode vibration coupling output in nearly 40% relative bandwidth scope, common wave guide box type window relative bandwidth then is no more than 20%.
Fig. 1 is a prior art waveguide throwout spiral travelling wave tube export structure longitudinal profile schematic diagram, comprises helix 1, supporting rod 2, short-circuit plunger 3, thin antenna 4, chokes tube 5, common wave guide box type window, output waveguide 7.This kind export structure frequency band is narrower, and heat-sinking capability is poor.
Fig. 2 is waveguide throwout spiral travelling wave tube export structure longitudinal profile schematic diagram of the present invention (left figure) and horizontal section schematic diagram (right figure), comprise helix 11, pottery supporting rod 12, helix to waveguide is mated direct particulate metal linkage section by helix-coaxial line transition 13, coaxial line-strip line transition 14, strip line-ridge waveguide transition 15, ridge waveguide-flat waveguide transition 16, flat waveguide 17, flat waveguide-microwave window termination waveguide transition 18, the wide microwave window 19 of high-power all-wave conduction band, microwave window termination waveguide-standard waveguide transition 20 and outputting standard waveguide 21 constitute.This part is finished the microwave propagation pattern and is changed to standard waveguide fast wave mode transfer by helix slow-wave, is the left-right symmetric structural design.Right figure as Fig. 2.
As an embodiment, after carrying out parameter optimization, helix-coaxial line-strip line transition is not more than 50mm thickness by a segment length and constitutes for the 3mm oxygen-free copper stripe, wherein the oxygen-free copper stripe thickness of helix-coaxial line changeover portion 13 is not less than 2mm, and helix-coaxial line changeover portion 13 corresponding row wave duct outer conductor shell otch angular ranges are 40-50 °.Strip line width j is 6mm, and the vallum width n in the flat waveguide 17 is 21mm, and vallum height e is 6mm, and ridge waveguide height d is 8mm.Helix-coaxial line changeover portion 13 corresponding duct width k are 10mm among Fig. 2 (right figure), coaxial line-strip line transition 14 corresponding duct width l are 26mm, strip line-ridge waveguide transition 15 corresponding duct width m are 45mm, duct width p is consistent with outputting standard waveguide 21 width later on, is 72.14mm.Its overall length is not more than 250mm (h mark among the figure).
Concrete being of a size of among the figure: (except that angle, its counit is mm)
A=34.04 b=12 c=6.5 d=8 e=6 f=3 g=2 h＜250 i＜φ=60 θ are 45～50 ° to 40j=6 k=10 l=25 m=46 n=21 p=72.14
Fig. 3 is the schematic diagram of existing wave guide box type window setting technique.31 is the standard rectangular waveguide segment among the figure, and 32 is dieelctric sheet, and 33 is the circular waveguide section, and 34 is metal clad sealing-in section, for symmetrical structure designs.Generally speaking, the dieelctric sheet diameter is greater than rectangular waveguide cross section catercorner length.
Fig. 4 is the schematic diagram of the wide box type of the high-power all-wave conduction band of the present invention window.Comprise microwave window termination waveguide 41, circular waveguide section 42, potsherd 43, metal to ceramic sealing section 44, cooling jacket 45, transition waceguide 20 and standard output termination waveguide 21.The present invention selects to reduce termination Narrow Wall of Waveguide limit height, and keeps waveguide broadside size constancy, and the termination waveguide is about 0.8 with outputting standard duct height ratio.Optimize other structural parameters of box type window simultaneously, suppress ghosts mode oscillation mode in the bandwidth.The transition steps waveguide is finished the termination waveguide to the standard waveguide impedance matching function.Export termination waveguide 21 centers and ceramic window 43 centers this moment not on sustained height, be the dissymmetrical structure design.
After the optimal design, this box type window has good standing wave spy in the standard waveguide bandwidth The property, have following characteristics: ceramic window diameter is littler, less than the waveguide broadside size; Window is thick Degree can keep higher with diameter than still, and is about 0.03, guaranteed simultaneously vacuum seal technology and machinery Requirement of strength, and littler ceramic window sheet volume has also reduced the microwave window dielectric loss; Metal is made pottery The hard solder sealing-in is adopted in porcelain sealing-in place, such as silver-copper brazing alloy; Metal to ceramic sealing place outside is connected to be followed Encircle cooling jacket, finish the cooling heat dissipation of ceramic window.
Claims (6)
1, complete waveguide bandwidth standard waveguide output high power helix TWT, comprise body (30) with and interior helix (11), supporting rod (12), flat waveguide (17), microwave window (19), it is characterized in that having one helix-ridge waveguide transition structure to connect flat waveguide (17) and helix (11); Flat waveguide (17) is connected with microwave window (19) by flat waveguide-microwave window termination waveguide transition section (18); Microwave window (19) is connected to output termination waveguide (21) by transition waceguide (20).
2, complete waveguide bandwidth standard waveguide output high power helix TWT as claimed in claim 1, it is characterized in that, described helix-ridge waveguide transition structure comprises helix-coaxial line changeover portion (13), coaxial line-strip line changeover portion (14) and strip line-ridge waveguide changeover portion (15), from helix-coaxial line changeover portion (13) to strip line-ridge waveguide changeover portion (15) width increases step by step, simultaneously, the width of helix-residing waveguide segment of ridge waveguide transition structure is also for increasing step by step.
3, complete waveguide bandwidth standard waveguide output high power helix TWT as claimed in claim 1 is characterized in that, described flat waveguide-microwave window termination waveguide transition section (18) is the step-shaped transition structure.
4, complete waveguide bandwidth standard waveguide output high power helix TWT as claimed in claim 1, it is characterized in that, described microwave window (19) comprises microwave window termination waveguide (41), circular waveguide section (42), potsherd (43), metal to ceramic sealing section (44) and cooling jacket (45), and the center of output termination waveguide (21) and the center of ceramic window (43) be not on sustained height.
5, complete waveguide bandwidth standard waveguide output high power helix TWT as claimed in claim 4 is characterized in that, described cooling jacket (45) is for being arranged at the tank in circular waveguide section (42) shell.
6, complete waveguide bandwidth standard waveguide output high power helix TWT as claimed in claim 1 is characterized in that, transition waceguide (20) is a step structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810044311A CN100583368C (en) | 2008-04-29 | 2008-04-29 | Complete waveguide bandwidth standard waveguide output high power helix TWT |
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| CN200810044311A CN100583368C (en) | 2008-04-29 | 2008-04-29 | Complete waveguide bandwidth standard waveguide output high power helix TWT |
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| CN101281851A true CN101281851A (en) | 2008-10-08 |
| CN100583368C CN100583368C (en) | 2010-01-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101673649B (en) * | 2009-10-14 | 2011-08-24 | 安徽华东光电技术研究所 | Assembling jig of millimeter wave traveling wave tube helix slow wave system and assembling method |
| CN102394575A (en) * | 2011-09-19 | 2012-03-28 | 杭州电子科技大学 | Expanded coaxial line multi-way synthesis amplification device |
| CN109213259A (en) * | 2017-07-03 | 2019-01-15 | 中国人民解放军信息工程大学 | Travelling tube helical line voltage control method and control device |
| CN112349566A (en) * | 2020-09-23 | 2021-02-09 | 电子科技大学 | Device for improving standing wave coefficient of millimeter wave helix traveling wave tube |
| CN112688061A (en) * | 2020-12-16 | 2021-04-20 | 航天科工微电子系统研究院有限公司 | Microwave radiation unit structure based on electric vacuum device and waveguide slot array antenna |
| CN115395190A (en) * | 2022-09-23 | 2022-11-25 | 上海嘉煜康科技发展有限公司 | C-waveband low-loss high-power sealing window |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760928A (en) * | 2012-07-10 | 2012-10-31 | 中国船舶重工集团公司第七二四研究所 | Design method of output conversion interface of high-power synthesizer |
-
2008
- 2008-04-29 CN CN200810044311A patent/CN100583368C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101673649B (en) * | 2009-10-14 | 2011-08-24 | 安徽华东光电技术研究所 | Assembling jig of millimeter wave traveling wave tube helix slow wave system and assembling method |
| CN102394575A (en) * | 2011-09-19 | 2012-03-28 | 杭州电子科技大学 | Expanded coaxial line multi-way synthesis amplification device |
| CN109213259A (en) * | 2017-07-03 | 2019-01-15 | 中国人民解放军信息工程大学 | Travelling tube helical line voltage control method and control device |
| CN112349566A (en) * | 2020-09-23 | 2021-02-09 | 电子科技大学 | Device for improving standing wave coefficient of millimeter wave helix traveling wave tube |
| CN112688061A (en) * | 2020-12-16 | 2021-04-20 | 航天科工微电子系统研究院有限公司 | Microwave radiation unit structure based on electric vacuum device and waveguide slot array antenna |
| CN115395190A (en) * | 2022-09-23 | 2022-11-25 | 上海嘉煜康科技发展有限公司 | C-waveband low-loss high-power sealing window |
| CN115395190B (en) * | 2022-09-23 | 2024-03-19 | 上海嘉煜康科技发展有限公司 | C-band low-loss high-power sealing window |
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| CN100583368C (en) | 2010-01-20 |
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Granted publication date: 20100120 Termination date: 20130429 |