CN101651074B - Ridge loading zigzag waveguide slow wave line - Google Patents
Ridge loading zigzag waveguide slow wave line Download PDFInfo
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- CN101651074B CN101651074B CN2009100600673A CN200910060067A CN101651074B CN 101651074 B CN101651074 B CN 101651074B CN 2009100600673 A CN2009100600673 A CN 2009100600673A CN 200910060067 A CN200910060067 A CN 200910060067A CN 101651074 B CN101651074 B CN 101651074B
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Abstract
The invention relates to a ridge loading zigzag waveguide slow wave line which belongs to the technical field of microwave vacuum electrons and relates to a traveling wave tube amplification device. The device is formed by connecting a series of arc bending waveguides (or right-angle bending waveguides) and straight waveguides end to end, i.e. bending rectangular waveguides into a U-shaped zigzag line (or a right-angle zigzag line) periodically along the electric field surface, so as to form a zigzag waveguide structure. A metal ridge sheet with a certain thickness is loaded on the inner walls of the straight waveguides of each zigzag unit, and the waveguide walls and the metal ridge sheets are provided with round through holes along the position of a middle axle symmetric line of a slow wave structure, wherein the round through holes of the straight waveguides of two adjacent zigzag units are connected through a metal pipe with an aperture size the same as the aperture size of the round through hole so as to form an electron bunch passage. The invention can improve the coupling impedance of a zigzag waveguide slow wave system, thereby ensuring that a zigzag waveguide traveling wave tube has higher gain and efficiency.
Description
Technical field
The invention belongs to the microwave vacuum electronic technology field, relate to travelling-wave tube amplifier spare.
Background technology
Travelling wave tube has the incomparable superiority of other devices as the electron tube that microwave frequency band is most widely used.Slow wave line is as the core component of travelling wave tube notes-Bo mutual effect, and its performance quality has directly determined the technical merit of travelling wave tube.Helix and coupling cavity are most popular slow wave systems in the travelling wave tube always.Though helix TWT has the above bandwidth of octave, power output is subjected to the restriction of heat dissipation ability; Particularly when travelling wave tube works in short centimetre and millimere-wave band, because the helix lateral dimension is minimum, the heat radiation difficulty, its power capacity is littler.Though coupled-cavity TWT has the power level than the high order of magnitude of helix, pulse power can be up to hundreds of kW, because the influence of band edge vibration, its bandwidth is very narrow.In addition, the millimeter wave coupled-cavity TWT is small-sized, and processing, assembly precision require high, and rate of finished products is low, the cost height.Therefore, searching can be operated in millimere-wave band, and the novel TWT slow wave structure of function admirable just seems very necessary.
Winding waveguide slow wave line as shown in Figure 1, is the novel all-metal slow wave line of a class, and it is periodically bent to perpendicular type meander line or U type meander line and form along electric field face (the wide face of waveguide) by rectangular waveguide 1; At position opened round through hole on wave guide wall along the axis line of symmetry 2 of slow wave structure; Periodically between two manholes of trough with straight angle or U type groove, use the metal tube identical 3 to connect in each of slow wave structure then, form electronics and annotate passage with the manhole aperture size.Winding waveguide slow wave line longitudinally the plane of symmetry profile as shown in Figure 2.This slow wave structure has good broadband performance when realizing high power capacity.This structure mainly contains that mechanical strength height, good heat dissipation, power capacity are big, processing is than being easier to and the relatively simple advantage of input and output coupled structure.Simultaneously, owing to can adopt Micrometer-Nanometer Processing Technology manufacturing, the miniature winding waveguide travelling wave tube that with the winding waveguide slow wave structure is core becomes a kind of high-power, miniaturized radiation source in that millimere-wave band is very potential, has good application prospects in fields such as military electronic system and broadband millimeter-wave communications.
But,, be operated on the negative primary space harmonic wave, so the coupling impedance of this slow wave structure is lower because the winding waveguide slow wave system belongs to the system that first-harmonic is the back ripple.According to Pierre's Si theory, the gain of travelling wave tube is directly proportional with the gain parameter; The gain parameter of travelling wave tube is:
Wherein Kc is a coupling impedance, I
0, V
0Be respectively beam current and voltage.Large signal theory the analysis showed that electronic efficiency has following relation: η
Emax=KC, wherein k=0.5～7.Therefore, coupling impedance is as the parameter that characterizes slow wave system and beam coupling power, and is directly related with efficient with the gain of travelling wave tube.According to existing domestic and international related experiment report,, make the gain of travelling wave tube integral body and efficient be limited because the coupling impedance of winding waveguide slow wave structure is low.
Summary of the invention
In order to improve the coupling impedance of winding waveguide slow wave system, thereby make the winding waveguide travelling wave tube have higher gain and efficient, the present invention proposes a kind of tortuous double ridged waveguide slow wave line.
The technical solution adopted in the present invention is:
A kind of ridge loading winding waveguide slow wave line, as shown in Figure 3, be formed by connecting from beginning to end by a series of circular arc curved waveguide (or right-angle bending waveguide) and straight wave guide, be equal to by rectangular waveguide 1 and periodically bend to U type meander line (or perpendicular type meander line), form the winding waveguide structure along the electric field face.Straight wave guide inwall in each tortuous unit is loaded with certain thickness metal ridge sheet 4; Position at the axis line of symmetry 2 of wave guide wall and metal ridge sheet upper edge slow wave structure has manhole, between the manhole of the straight wave guide of adjacent two tortuous unit, adopts the metal tube identical with the manhole aperture size 3 to connect, and forms electronics and annotates passage.
Dimensional parameters such as Fig. 4 of ridge loading winding waveguide slow wave structure, shown in Figure 5: a is the waveguide width edge length, and b is the Narrow Wall of Waveguide edge lengths, and L is the meander length of single tortuous periodic structure, and H is the height of straight wave guide, r
0Be the radius of electronics notes passage, w is the width of metal ridge sheet, and d is the thickness of metal ridge sheet, and h is the height of metal ridge sheet.The relative dimensions of metal ridge sheet satisfies: 2r
0＜w≤a, 0＜d＜0.5b, 2r
0＜h≤H.
Setting structure size (unit: mm): a=5, b=0.8, L=4.56, H=2.2, r
0=0.5, w=5, d=0.25, h=2.2.Utilize the 3 D electromagnetic simulation software that ridge loading winding waveguide slow wave structure provided by the invention is carried out emulation, obtain its dispersion characteristics and coupling impedance, and (see Chinese patent application: a kind of tortuous double ridged waveguide slow wave line with tortuous two ridge slow wave structures, application number: 200910059552.9, date of application: 2009.6.10), common winding waveguide slow wave structure relatively, simulation result is as shown in Figure 6 and Figure 7.Wherein, curve 5 and curve 8 are respectively the dispersion characteristic curve and the coupling impedance curves of common winding waveguide slow wave structure, curve 6 and curve 9 are respectively the dispersion characteristic curve and the coupling impedance curves of tortuous double ridged waveguide slow wave structure, and curve 7 and curve 10 are dispersion characteristic curve and coupling impedance curves of ridge loading winding waveguide slow wave structure provided by the invention.
From Fig. 6 curve 5, curve 6 and curve 7 more as can be known: than common winding waveguide slow wave structure, the dispersion curve of tortuous two ridge slow wave structures is more smooth, in the wideer frequency band range of working; And the chromatic dispersion of ridge loading winding waveguide slow wave structure provided by the invention is stronger, and working band has narrowed down.
The comparison of curve 8, curve 9 and curve 10 can obviously be found out from Fig. 7: than common winding waveguide slow wave structure, the coupling impedance of tortuous two ridge slow wave structures is lower, and ridge loading winding waveguide structure provided by the invention has higher coupling impedance value, particularly near front end.Illustrate by metal-loaded ridge sheet on the straight wave guide of winding waveguide slow wave structure, can improve the coupling impedance of slow wave structure, thereby make the gain of leading wave duct and efficient be improved.
Description of drawings
Fig. 1 is the schematic perspective view of common winding waveguide slow wave structure.
Fig. 2 is the profile of common winding waveguide slow wave structure along y direction.
Fig. 3 is a ridge loading winding waveguide slow wave structure schematic diagram provided by the invention.
Fig. 4 is the schematic diagram of ridge loading winding waveguide slow wave structure cross section provided by the invention.
Fig. 5 is the schematic diagram of ridge loading winding waveguide slow wave structure provided by the invention longitudinal section.
Fig. 6 is the dispersion characteristics comparison diagram of ridge loading winding waveguide slow wave structure, tortuous two ridge slow wave structures and common winding waveguide slow wave structure.
Fig. 7 is the coupling impedance comparison diagram of ridge loading winding waveguide slow wave structure, tortuous two ridge slow wave structures and common winding waveguide slow wave structure.
In above each figure: the 1st, rectangular waveguide, the 2nd, the axis line of symmetry of slow wave structure, the 3rd, form the metal tube that electronics is annotated passage, the 4th, the metal ridge sheet, curve 5 and curve 8 are respectively the dispersion characteristic curve and the coupling impedance curves of common winding waveguide slow wave structure, curve 6 and curve 9 are respectively the dispersion characteristic curve and the coupling impedance curves of tortuous double ridged waveguide slow wave structure, and curve 7 and curve 10 are dispersion characteristic curve and coupling impedance curves of ridge loading winding waveguide slow wave structure.
Specific embodiments
As Fig. 4 and Fig. 5, in the 8mm millimere-wave band, physical dimension following (unit: mm): a=5, b=0.8, L=4.56, H=2.2, the r of the concrete scheme of tortuous double ridged waveguide slow wave line
0=0.5, w=5, d=0.25, h=2.2.Utilize the 3 D electromagnetic simulation software that ridge loading winding waveguide slow wave line provided by the invention is carried out emulation, obtain its dispersion characteristics and coupling impedance, and compare with tortuous two ridge slow wave structures, common winding waveguide slow wave line, simulation result as shown in Figure 6 and Figure 7.Curve 5 and curve 8 are respectively the dispersion characteristic curve and the coupling impedance curves of common winding waveguide slow wave structure, curve 6 and curve 9 are respectively the dispersion characteristic curve and the coupling impedance curves of tortuous double ridged waveguide slow wave structure, and curve 7 and curve 10 are dispersion characteristic curve and coupling impedance curves of ridge loading winding waveguide slow wave structure provided by the invention.
From Fig. 6 curve 5, curve 6 and curve 7 more as can be known: than common winding waveguide slow wave structure, the dispersion curve of tortuous two ridge slow wave structures is more smooth, in the wideer frequency band range of working; And the chromatic dispersion of ridge loading winding waveguide slow wave structure provided by the invention is stronger, and working band has narrowed down.
The comparison of curve 8, curve 9 and curve 10 can obviously be found out from Fig. 7: than common winding waveguide slow wave structure, the coupling impedance of tortuous two ridge slow wave structures is lower, and ridge loading winding waveguide structure has higher coupling impedance value, particularly near front end.Illustrate by metal-loaded ridge sheet on the straight wave guide of winding waveguide slow wave structure, can improve the coupling impedance of slow wave structure, thereby make the gain of leading wave duct and efficient be improved.
Claims (2)
1. a ridge loading winding waveguide slow wave line is formed by connecting from beginning to end by a series of circular arc curved waveguide and straight wave guide, is equal to by rectangular waveguide (1) periodically to bend to U type meander line along the electric field face, forms the winding waveguide structure; Straight wave guide inwall in each tortuous unit is loaded with certain thickness metal ridge sheet (4); Position at the axis line of symmetry (2) of wave guide wall and metal ridge sheet upper edge slow wave structure has manhole, between the manhole of the straight wave guide of adjacent two tortuous unit, adopt the metal tube (3) identical to connect, form electronics and annotate passage with the manhole aperture size;
The dimensional parameters of described ridge loading winding waveguide slow wave structure is: a is the waveguide width edge length, and b is the Narrow Wall of Waveguide edge lengths, and L is the meander length of single tortuous periodic structure, and H is the height of straight wave guide, r
0Be the radius of electronics notes passage, w is the width of metal ridge sheet, and d is the thickness of metal ridge sheet, and h is the height of metal ridge sheet; The relative dimensions of metal ridge sheet satisfies: 2r0＜w≤a, 0＜d＜0.5b, 2r0＜h≤H.
2. a ridge loading winding waveguide slow wave line is formed by connecting from beginning to end by a series of right-angle bending waveguide and straight wave guide, is equal to by rectangular waveguide (1) periodically to bend to the perpendicular type meander line along the electric field face, forms the winding waveguide structure; Straight wave guide inwall in each tortuous unit is loaded with certain thickness metal ridge sheet (4); Position at the axis line of symmetry (2) of wave guide wall and metal ridge sheet upper edge slow wave structure has manhole, between the manhole of the straight wave guide of adjacent two tortuous unit, adopt the metal tube (3) identical to connect, form electronics and annotate passage with the manhole aperture size;
The dimensional parameters of ridge loading winding waveguide slow wave structure is: a is the waveguide width edge length, and b is the Narrow Wall of Waveguide edge lengths, and L is the meander length of single tortuous periodic structure, and H is the height of straight wave guide, r
0Be the radius of electronics notes passage, w is the width of metal ridge sheet, and d is the thickness of metal ridge sheet, and h is the height of metal ridge sheet; The relative dimensions of metal ridge sheet satisfies: 2r0＜w≤a, 0＜d＜0.5b, 2r0＜h≤H.
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| CN2009100600673A CN101651074B (en) | 2009-07-22 | 2009-07-22 | Ridge loading zigzag waveguide slow wave line |
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| CN101651074B true CN101651074B (en) | 2011-02-09 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324363A (en) * | 2011-08-11 | 2012-01-18 | 电子科技大学 | Ridge-loaded zigzag rectangular groove waveguide slow wave line |
| CN102915898B (en) * | 2012-10-25 | 2014-12-24 | 电子科技大学 | Zigzag waveguide slow-wave line |
| CN103296979B (en) * | 2013-05-24 | 2016-04-27 | 中国电子科技集团公司第四十一研究所 | A kind of without medium high frequency easily extensible high-performance broadband orthoron |
| CN103854939B (en) * | 2014-01-10 | 2016-05-25 | 中国电子科技集团公司第十二研究所 | A kind of arc-shaped bend floding at boundary waveguide slow-wave structure |
| CN107564786B (en) * | 2016-06-30 | 2019-09-06 | 中国科学院电子学研究所 | A kind of folded waveguide slow wave system |
| CN108335958B (en) * | 2018-02-07 | 2019-10-29 | 电子科技大学 | A kind of double note slow-wave structures of winding waveguide of photonic crystal load |
| CN109494142B (en) * | 2018-11-21 | 2021-04-30 | 中国人民解放军国防科技大学 | Magnetic insulated wire oscillator with ridge loading blade structure |
| CN115083866A (en) * | 2022-07-19 | 2022-09-20 | 电子科技大学 | Sinusoidal zigzag waveguide slow wave component and traveling wave tube |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201160113Y (en) * | 2008-03-11 | 2008-12-03 | 东南大学 | Slow-wave module based on plane electric tape gap waveguide |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201160113Y (en) * | 2008-03-11 | 2008-12-03 | 东南大学 | Slow-wave module based on plane electric tape gap waveguide |
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