CN102339708A - Gradient ridge loading tortuous waveguide slow wave line - Google Patents
Gradient ridge loading tortuous waveguide slow wave line Download PDFInfo
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- CN102339708A CN102339708A CN2011103063988A CN201110306398A CN102339708A CN 102339708 A CN102339708 A CN 102339708A CN 2011103063988 A CN2011103063988 A CN 2011103063988A CN 201110306398 A CN201110306398 A CN 201110306398A CN 102339708 A CN102339708 A CN 102339708A
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Abstract
The invention discloses a gradient ridge loading tortuous waveguide slow wave line, and belongs to the technical field of microwave vacuum electronics. The slow wave line is formed by alternately connecting a series of arc bent waveguides (or right-angled bent waveguides) and straight waveguides end to end, equivalently a rectangular waveguide (1) is periodically bent into a tortuous waveguide structure along an electric field surface. A gradient metal ridge sheet (4) is loaded on the inner wall of the straight waveguide of each tortuous unit; and a circular through hole is formed in a middle axis symmetric line (2) on the waveguide wall and the metal ridge sheet along the slow wave structure, and the circular through holes of the straight waveguides of the two adjacent tortuous units are connected by adopting a metal pipe (3) with the same size as the apertures of the circular through holes to form an electron injection channel. When relatively high coupling impedance of the ridge loading tortuous waveguide slow wave line is kept, the standing wave coefficient of the ridge loading tortuous waveguide slow wave line can be reduced, and the transmission property of the slow wave line is improved; and the reflecting oscillation of a ridge loading tortuous waveguide traveling wave tube is inhibited, so that the ridge loading tortuous 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 advantages of other electron tubes such as broadband, high-gain and low noise, has powerful vitality, has obtained using widely at microwave frequency band.Slow wave line directly influences the efficient of notes-Bo mutual effect and the technical merit of whole travelling wave tube as the core component of travelling wave tube.Helix and coupling cavity are to use two kinds of the most general slow wave lines in the travelling wave tube.Helix TWT has very wide frequency band range, along with technology and Development of Materials, and manufacturing technology perfect, its power level further is improved.But because thermal capacity is little, dissipation capabilities is low, has limited the raising of helix TWT power output.Particularly work as helix TWT and be operated in millimeter wave and submillimeter region, further dwindling of transversary size causes its heat radiation difficulty more, and power capacity is littler.Coupled-cavity TWT is owing to adopt all-metal slow wave system, and its heat dispersion obviously is superior to helix, and its power output has exceeded a magnitude than helix TWT, but work zone width, generally about 10%.In addition, in millimere-wave band, spirality and coupled-cavity TWT are small-sized, and processing, assembly precision require high, and rate of finished products is low, and cost is high, has strengthened the difficulty that further develops.Therefore, explore the important directions that novel all-metal slow wave line is present travelling wave tube development.
Winding waveguide slow wave line; As shown in Figure 1; Be one type of novel all-metal slow wave line, it is periodically bent to perpendicular type meander line or U type meander line and forms along electric field face (the wide face of waveguide) by rectangular waveguide 1: at the 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.The winding waveguide slow wave line longitudinally profile of the plane of symmetry is as shown in Figure 2.Characteristics such as this structure has that power capacity is big, bandwidth performance is good, handling ease, energy coupled structure are simple.In addition, owing to can adopt Micrometer-Nanometer Processing Technology manufacturing, miniature winding waveguide travelling wave tube has good application prospects at all very potential radiation source that becomes a kind of high-power, broadband, miniaturization of millimeter and terahertz wave band at the broadband millimeter-wave communication field.The winding waveguide travelling wave tube has at home and abroad received widely and having paid close attention to, and this has been launched a large amount of theories and experimental study.
But because the winding waveguide slow wave system belongs to the system that first-harmonic is the back ripple, the coupling impedance of this slow wave structure is lower, thereby has limited the gain and the electronic efficiency of winding waveguide travelling wave tube.In order to satisfy the requirement of high-gain, a kind of novel ridge loading winding waveguide slow wave structure be suggested (see Chinese invention patent: a kind of ridge loading winding waveguide slow wave line, application number: 200910060067.3, publication number: CN 101651074A), as shown in Figure 3.The ridge loading winding waveguide slow wave line is the straight wave guide section adding rectangular metal ridge sheet 4 in the winding waveguide slow wave structure, thereby plays the effect that increases notes-Bo interaction region axial electric field, improves coupling impedance with this.But because rectangular metal ridge sheet 4 has been introduced the inhomogeneities on the propagation path; And there is not effective impedance matching; Therefore the bigger standing-wave ratio and the high-frequency loss of slow wave line ubiquity of this structure; Cause ridge loading winding waveguide travelling wave tube to have very big reflection vibration, limited the raising of power output and gain to a certain extent.
Summary of the invention
For standing-wave ratio and the high-frequency loss that reduces the ridge loading winding waveguide slow wave line, suppress the reflection vibration of ridge loading winding waveguide travelling wave tube, keep higher coupling impedance simultaneously, the present invention proposes a kind of gradual change ridge loading winding waveguide slow wave line.
The technical scheme that the present invention adopts is:
A kind of gradual change ridge loading winding waveguide slow wave line; As shown in Figure 5; The circular arc curved waveguide (or right-angle bending waveguide) in series of rectangular cross section and alternate being formed by connecting of straight wave guide head and the tail of same cross-sectional, form the tortuous slow wave structure of U type (or the tortuous slow wave structure of perpendicular type).Be equal to by rectangular waveguide (1) and periodically bend to the tortuous slow wave structure of U type (or the tortuous slow wave structure of perpendicular type) along the electric field face.Straight wave guide inwall in each tortuous unit is loaded with gradation type metal ridge sheet (4), and said gradation type metal ridge sheet thickness is extremely zero to gradual change all around by the fixed thickness of zone line.The gradual change form of gradation type metal ridge sheet (4) can be for linear pattern, circular arc type, notch cuttype and other continuous change type curves, shown in Fig. 6 (a) and (b), (c).Position at the axis line of symmetry (2) of straight wave guide wall and gradation type 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.
With linear pattern gradual change ridge loading winding waveguide slow wave structure is example, and its dimensional parameters such as Fig. 7, shown in Figure 8: 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 winding waveguide periodic structure, and H is the height of straight wave guide, r
0Be the radius of electronics notes passage, w is the width of gradation type metal ridge sheet, and d is the thickness of gradation type metal ridge sheet zone line, h
1Be the straightway height of gradation type metal ridge sheet, h
2Transition height for gradation type metal ridge sheet; H is the overall height of gradation type metal ridge sheet; The relative dimensions of gradation type metal ridge sheet satisfies: 2r
0＜w≤a, 0＜d≤0.5b, 2r
0＜h＜H, h
1+ h
2=h.
Setting structure size (unit: mm): a=2, b=0.3, H=0.6, L=1.542, r
0=0.2, w=2, d=0.07, h
1=0.42, h
2=0.09, h=H=0.6.Utilize the 3 D electromagnetic simulation software that gradual change ridge loading winding waveguide slow wave structure provided by the invention is carried out emulation; Obtain its dispersion characteristics, coupling impedance; And with have identical ridge sheet width w; The ridge loading winding waveguide slow wave structure of identical ridge sheet overall height h and identical ridge sheet thickness d (see Chinese invention patent: a kind of ridge loading winding waveguide slow wave line, application number: 200910060067.3, publication number: CN 101651074A) relatively.Be beneficial to the 3 D electromagnetic simulation software and respectively each 40 cycle of two kinds of slow wave structures simulated, obtain the standing-wave ratio and the S parameter of two kinds of structures.Simulation result such as Fig. 9, Figure 10, Figure 11, shown in Figure 12.Wherein, curve 5, curve 7, curve 9 and curve 11 are respectively dispersion characteristic curve, coupling impedance curve, standing-wave ratio curve and the S parameter curves of common ridge loading winding waveguide slow wave structure; Curve 6, curve 8, curve 10 and curve 12 are respectively dispersion characteristic curve, coupling impedance curve, standing-wave ratio curve and the S parameter curves of gradual change ridge loading winding waveguide slow wave structure provided by the invention.
The comparison of curve 5 and curve 6 can be known from Fig. 9: than common ridge loading winding waveguide slow wave structure, (80～105GHz), the phase velocity of gradual change ridge loading winding waveguide slow wave structure provided by the present invention all outline is high in quite wide frequency band.And being lower than the low-frequency range of 80GHz, the phase velocity of the two is basic identical.
The comparison of curve 7 and curve 8 can be known from Figure 10: than common ridge loading winding waveguide slow wave structure, gradual change ridge loading winding waveguide slow wave structure provided by the present invention all has slightly high coupling impedance value in whole frequency band.Explain that gradual change ridge loading winding waveguide slow wave structure can keep the advantage of the higher coupling impedance of original common ridge loading winding waveguide slow wave structure.
The comparison of curve 9 and curve 10 can significantly be found out from Figure 11: than common ridge loading winding waveguide slow wave structure; Gradual change ridge loading winding waveguide slow wave structure provided by the present invention has littler standing-wave ratio; Explain that the adding of gradual change ridge has reached the purpose of impedance matching; Thereby effectively reduced the reflection of slow wave line, helped the generation of inhibitory reflex vibration.
The comparison of curve 11 and curve 12 can significantly be found out from Figure 12: than common ridge loading winding waveguide slow wave structure, gradual change ridge loading winding waveguide slow wave structure provided by the present invention has better transmission characteristic.
Description of drawings
Fig. 1 is the schematic perspective view of winding waveguide slow wave structure.
Fig. 2 is the profile of winding waveguide slow wave structure along y direction.
Fig. 3 is common ridge loading winding waveguide slow wave structure sketch map.
Fig. 4 is the sketch map of common ridge loading winding waveguide slow wave structure longitudinal section.
Fig. 5 is the sketch map of gradual change ridge loading winding waveguide slow wave structure provided by the invention.
Fig. 6 is the sketch map of linear pattern gradual change ridge loading winding waveguide slow wave structure provided by the invention longitudinal section.
Fig. 7 is linear pattern provided by the invention (a), circular arc type (b) and notch cuttype metal ridge sheet gradual change form sketch mapes such as (c).
Fig. 8 is the sketch map of gradual change ridge loading winding waveguide slow wave structure cross section provided by the invention.
Fig. 9 is the dispersion characteristics comparison diagram of common ridge loading winding waveguide slow wave structure and gradual change ridge loading winding waveguide slow wave structure.
Figure 10 is the coupling impedance comparison diagram of common ridge loading winding waveguide slow wave structure and gradual change ridge loading winding waveguide slow wave structure.
Figure 11 is the standing-wave ratio comparison diagram of common ridge loading winding waveguide slow wave structure and gradual change ridge loading winding waveguide slow wave structure.
Figure 12 is the S parameter comparison diagram of common ridge loading winding waveguide slow wave structure and gradual change ridge loading 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, metal ridge sheet, curve 5, curve 7, curve 9 and curve 11 are dispersion characteristic curve, coupling impedance curve, standing-wave ratio curve and S parameter curves of common ridge loading winding waveguide slow wave structure; Curve 6, curve 8, curve 10 and curve 12 are dispersion characteristic curve, coupling impedance curve, standing-wave ratio curve and S parameter curves of gradual change ridge loading winding waveguide slow wave structure provided by the invention.
Embodiment
Like Fig. 7 and Fig. 8, at the 3mm wave band, the physical dimension of the concrete scheme of linear pattern gradual change ridge loading winding waveguide slow wave line is following: (unit: mm) a=2, b=0.3, H=0.6, L=1.542, r
0=0.2, w=2, d=0.07, h
1=0.42, h
2=0.09, h=H=0.6.Utilize the 3 D electromagnetic simulation software that gradual change ridge loading winding waveguide slow wave structure provided by the invention is carried out emulation; Obtain its dispersion characteristics, coupling impedance, standing-wave ratio and high-frequency loss; And with have identical ridge sheet width w, the ridge loading winding waveguide slow wave structure of identical ridge sheet overall height h and identical ridge sheet thickness d is relatively.Be beneficial to the 3 D electromagnetic simulation software and respectively each 40 cycle of two kinds of slow wave structures simulated, obtain the standing-wave ratio and the S parameter of two kinds of structures.Simulation result such as Fig. 9, Figure 10, Figure 11, shown in Figure 12.Wherein, curve 5, curve 7, curve 9 and curve 11 are respectively dispersion characteristic curve, coupling impedance curve, standing-wave ratio curve and the S parameter curves of common ridge loading winding waveguide slow wave structure; Curve 6, curve 8, curve 10 and curve 12 are respectively dispersion characteristic curve, coupling impedance curve, standing-wave ratio curve and the S parameter curves of gradual change ridge loading winding waveguide slow wave structure provided by the invention.
The comparison of curve 5 and curve 6 can be known from Fig. 9: than common ridge loading winding waveguide slow wave structure, (80～105GHz), the phase velocity of gradual change ridge loading winding waveguide slow wave structure provided by the present invention all outline is high in quite wide frequency band.And being lower than the low-frequency range of 80GHz, the phase velocity of the two is basic identical.
The comparison of curve 7 and curve 8 can be known from Figure 10: than common ridge loading winding waveguide slow wave structure, gradual change ridge loading winding waveguide slow wave structure provided by the present invention all has slightly high coupling impedance value in whole frequency band.Explain that gradual change ridge loading winding waveguide slow wave structure can keep the advantage of the higher coupling impedance of original common ridge loading winding waveguide slow wave structure.
The comparison of curve 9 and curve 10 can significantly be found out from Figure 11: than common ridge loading winding waveguide slow wave structure; Gradual change ridge loading winding waveguide slow wave structure provided by the present invention has littler standing-wave ratio; Explain that the adding of gradual change ridge has reached the purpose of impedance matching; Thereby effectively reduced the reflection of slow wave line, helped the generation of inhibitory reflex vibration.
The comparison of curve 11 and curve 12 can significantly be found out from Figure 12: than common ridge loading winding waveguide slow wave structure, gradual change ridge loading winding waveguide slow wave structure provided by the present invention has better transmission characteristic.
Claims (4)
1. gradual change ridge loading winding waveguide slow wave line; The circular arc curved waveguide in series of rectangular cross section and alternate being formed by connecting of straight wave guide head and the tail of same cross-sectional; Form the tortuous slow wave structure of U type, be equal to by rectangular waveguide (1) and periodically bend to the tortuous slow wave structure of U type along the electric field face; It is characterized in that the straight wave guide inwall in each tortuous unit is loaded with gradation type metal ridge sheet (4), said gradation type metal ridge sheet thickness is extremely zero to gradual change all around by the fixed thickness of zone line; Position at the axis line of symmetry (2) of straight wave guide wall and gradation type 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.
2. gradual change ridge loading winding waveguide slow wave line; Alternate being formed by connecting of the straight wave guide head and the tail series of rectangular cross section or right-angle bending waveguide and same cross-sectional; Form the tortuous slow wave structure of perpendicular type, be equal to by rectangular waveguide (1) and periodically bend to the tortuous slow wave structure of perpendicular type along the electric field face; It is characterized in that the straight wave guide inwall in each tortuous unit is loaded with gradation type metal ridge sheet (4), said gradation type metal ridge sheet thickness is extremely zero to gradual change all around by the fixed thickness of zone line; Position at the axis line of symmetry (2) of straight wave guide wall and gradation type 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.
3. gradual change ridge loading winding waveguide slow wave line according to claim 1 and 2 is characterized in that, the gradual change form of said gradation type metal ridge sheet (4) is linear pattern, circular arc type, notch cuttype and other continuous change type curves.
4. gradual change ridge loading winding waveguide slow wave line according to claim 1 and 2 is characterized in that 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 winding waveguide periodic structure, and H is the height of straight wave guide, r
0Be the radius of electronics notes passage, w is the width of gradation type metal ridge sheet, and d is the thickness of gradation type metal ridge sheet zone line, h
1Be the straightway height of gradation type metal ridge sheet, h
2Transition height for gradation type metal ridge sheet; H is the overall height of gradation type metal ridge sheet; The relative dimensions of gradation type metal ridge sheet satisfies: 2r
0＜w≤a, 0＜d≤0.5b, 2r
0＜h＜H, h
1+ h
2=h.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110306398.8A CN102339708B (en) | 2011-10-11 | 2011-10-11 | Gradient ridge loading tortuous waveguide slow wave line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110306398.8A CN102339708B (en) | 2011-10-11 | 2011-10-11 | Gradient ridge loading tortuous waveguide slow wave line |
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| CN102339708B CN102339708B (en) | 2014-10-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102915898A (en) * | 2012-10-25 | 2013-02-06 | 电子科技大学 | Zigzag waveguide slow-wave line |
| CN103854939A (en) * | 2014-01-10 | 2014-06-11 | 中国电子科技集团公司第十二研究所 | Arc-shaped curve boundary folding waveguide slow wave structure |
| CN107833815A (en) * | 2017-10-30 | 2018-03-23 | 电子科技大学 | A kind of tortuous banding slow wave system of Plane Angle logarithm |
| CN109494142A (en) * | 2018-11-21 | 2019-03-19 | 中国人民解放军国防科技大学 | Magnetic insulated wire oscillator with ridge loading blade structure |
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|---|---|---|---|---|
| US4333038A (en) * | 1980-04-07 | 1982-06-01 | Nippon Electric Co., Ltd. | Traveling wave tube devices |
| US4414486A (en) * | 1980-07-09 | 1983-11-08 | Nippon Electric Co., Ltd. | Coupled cavity type traveling wave tube |
| US7023302B2 (en) * | 2004-01-14 | 2006-04-04 | Northrop Grumman Corporation | Slow-wave structure for ridge waveguide |
| CN101572205A (en) * | 2009-06-10 | 2009-11-04 | 电子科技大学 | Zigzag slow-wave line of double ridged waveguide |
| CN202352608U (en) * | 2011-10-11 | 2012-07-25 | 电子科技大学 | Tapered ridge loading serpentine waveguide slow-wave line |
-
2011
- 2011-10-11 CN CN201110306398.8A patent/CN102339708B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4333038A (en) * | 1980-04-07 | 1982-06-01 | Nippon Electric Co., Ltd. | Traveling wave tube devices |
| US4414486A (en) * | 1980-07-09 | 1983-11-08 | Nippon Electric Co., Ltd. | Coupled cavity type traveling wave tube |
| US7023302B2 (en) * | 2004-01-14 | 2006-04-04 | Northrop Grumman Corporation | Slow-wave structure for ridge waveguide |
| CN101572205A (en) * | 2009-06-10 | 2009-11-04 | 电子科技大学 | Zigzag slow-wave line of double ridged waveguide |
| CN202352608U (en) * | 2011-10-11 | 2012-07-25 | 电子科技大学 | Tapered ridge loading serpentine waveguide slow-wave line |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102915898A (en) * | 2012-10-25 | 2013-02-06 | 电子科技大学 | Zigzag waveguide slow-wave line |
| CN102915898B (en) * | 2012-10-25 | 2014-12-24 | 电子科技大学 | Zigzag waveguide slow-wave line |
| CN103854939A (en) * | 2014-01-10 | 2014-06-11 | 中国电子科技集团公司第十二研究所 | Arc-shaped curve boundary folding waveguide slow wave structure |
| 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 |
| CN107833815A (en) * | 2017-10-30 | 2018-03-23 | 电子科技大学 | A kind of tortuous banding slow wave system of Plane Angle logarithm |
| CN109494142A (en) * | 2018-11-21 | 2019-03-19 | 中国人民解放军国防科技大学 | Magnetic insulated wire oscillator with ridge loading blade structure |
| 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 |
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| CN102339708B (en) | 2014-10-15 |
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