CN108807113A - A kind of quasi-coaxial complications ribbon beam slow-wave structure - Google Patents
A kind of quasi-coaxial complications ribbon beam slow-wave structure Download PDFInfo
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- CN108807113A CN108807113A CN201810414280.9A CN201810414280A CN108807113A CN 108807113 A CN108807113 A CN 108807113A CN 201810414280 A CN201810414280 A CN 201810414280A CN 108807113 A CN108807113 A CN 108807113A
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- internal layer
- waveguide structure
- winding waveguide
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- 239000002184 metal Substances 0.000 claims abstract description 83
- 229910052751 metal Inorganic materials 0.000 claims abstract description 83
- 238000004804 winding Methods 0.000 claims abstract description 37
- 238000010894 electron beam technology Methods 0.000 claims abstract description 28
- 238000005452 bending Methods 0.000 claims abstract description 9
- 238000004080 punching Methods 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 abstract description 8
- 230000005684 electric field Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010606 normalization Methods 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 230000002146 bilateral effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241001212149 Cathetus Species 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/16—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
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- Waveguides (AREA)
- Microwave Tubes (AREA)
Abstract
The invention discloses a kind of quasi-coaxial complications ribbon beam slow-wave structures, including metal shell, metal slow wave line and two dielectric support bars, metal shell is divided into internal layer and outer layer, internal layer uses winding waveguide structure, electron beam channel is band-like, and the bending part between the two neighboring ridge piece of winding waveguide structure is provided with opening；Metal slow wave line folds to obtain using metal wire, and folding path is identical as the folding path of winding waveguide structure of metal shell internal layer, and identical electron beam channel is arranged；Two dielectric support bars are individually fixed between the internal layer and outer layer of metal shell both sides, the opening that the surface of dielectric support bar is arranged from winding waveguide structure is exposed, face is carried out with metal slow wave line to contact, metal slow wave line is realized and is clamped, metal slow wave line is made to be suspended in intracavitary in metal shell.The present invention can reduce dispersion characteristics, and coupled impedance is improved under the premise of ensureing big bandwidth.
Description
Technical field
The invention belongs to ribbon beam traveling wave tube slow-wave system technical fields, more specifically, it is bent to be related to a kind of quasi-coaxial
Roll over ribbon beam slow-wave structure.
Background technology
Travelling-wave tubes has very extensive application field as a kind of microwave power device, for different application modes,
Travelling-wave tubes has the characteristics that different, and usually, the advantages of travelling-wave tubes has, bandwidth, power is big, high gain, efficient, gain
Big and long lifespan etc., but in most cases, a travelling-wave tubes cannot have the advantages that all simultaneously, but respectively have
The chief has the advantages that different travelling-wave tubes is applied to different fields.
Slow-wave structure is to realize the interaction for reinforcing moving electron and electromagnetic field in travelling-wave type electronic device, make
The energy of electron stream is more effectively converted into the device of the high-frequency energy of electromagnetic wave.Core of the slow-wave structure as travelling-wave tubes
Point, quality directly decides the quality of travelling-wave tubes technical merit.
Conventional planar slow-wave structure includes microstrip type slow-wave structure and band-like slow-wave structure, the wherein electricity of micro-strip slow-wave structure
Field energy focuses primarily upon in its medium substrate, and with the thickness of medium substrate reduce and its dielectric constant increase and further
Obviously, the shortcomings of that there are transmission characteristics is poor, narrow bandwidth；And the dispersion of band-like slow-wave structure has larger phase with more structural parameters
Guan Xing, usually dispersion is stronger under the limitation of existing processing conditions.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of quasi-coaxial complications ribbon beam slow-wave structure,
Metal shell internal layer and metal slow wave line use the structure for being similar to the coaxial line Jing Guo zigzag folded, using two dielectric supports
Bar supports metal slow wave line, can reduce dispersion characteristics, coupled impedance is improved under the premise of ensureing big bandwidth.
For achieving the above object, quasi-coaxial complications ribbon beam slow-wave structure of the present invention includes that metal shell, metal are slow
Swash and two dielectric support bars, wherein：
Metal shell is divided into internal layer and outer layer, and internal layer uses winding waveguide structure, in the symmetrical above and below of winding waveguide structure
Band-like electron beam channel is set in plane, and the section of electron beam channel completely includes electronics note section, and in winding waveguide knot
Bending part between the two neighboring ridge piece of structure is provided with opening；
Metal slow wave line folds to obtain using metal wire, the folding of folding path and the winding waveguide structure of metal shell internal layer
Folded path is identical, and punching forms electron beam channel on the face symmetrical above and below of metal wire after folding, the electron beam channel and metal
The electron beam channel of the winding waveguide structure of shell internal layer overlaps；
Two dielectric support bars are individually fixed between the internal layer and outer layer of metal shell both sides, the part of dielectric support bar
The opening that side is arranged from winding waveguide structure is exposed, and carrying out face with metal slow wave line contacts, and realizes and presss from both sides to metal slow wave line
It holds, metal slow wave line is made to be suspended in intracavitary in metal shell.
Quasi-coaxial complications ribbon beam slow-wave structure of the present invention, including metal shell, metal slow wave line and two dielectric supports
Bar, metal shell are divided into internal layer and outer layer, and it is band-like, winding waveguide structure that internal layer, which uses winding waveguide structure, electron beam channel,
Two neighboring ridge piece between bending part be provided with opening；Metal slow wave line folds to obtain using metal wire, folding path with
The folding road path of the winding waveguide structure of metal shell internal layer is identical, and identical electron beam channel is arranged；Two dielectric supports
Bar is individually fixed between the internal layer and outer layer of metal shell both sides, and the surface of dielectric support bar is from winding waveguide structure
The opening of setting is exposed, and carrying out face with metal slow wave line contacts, and realizes and is clamped to metal slow wave line, metal slow wave line is made to be suspended in
Intracavitary in metal shell.The present invention can reduce dispersion characteristics, and coupled impedance is improved under the premise of ensureing big bandwidth.
Description of the drawings
Fig. 1 is the specific implementation mode structure chart of quasi-coaxial complications ribbon beam slow-wave structure of the present invention；
Fig. 2 is the enlarged drawing of the lower half portion structure of the ribbon beam slow-wave structure of quasi-coaxial complications shown in Fig. 1；
Fig. 3 is the monocycle structure chart of the ribbon beam slow-wave structure of quasi-coaxial complications shown in Fig. 1；
Fig. 4 is winding waveguide structural schematic diagram；
Fig. 5 is the transverse cross-sectional view of the ribbon beam slow-wave structure of quasi-coaxial complications shown in Fig. 1；
Fig. 6 is the longitudinal sectional drawing of the ribbon beam slow-wave structure of quasi-coaxial complications shown in Fig. 1；
Fig. 7 is the transmission characteristic simulation result of the present embodiment；
Fig. 8 is the normalization phase velocity simulation result of the present embodiment.
Specific implementation mode
The specific implementation mode of the present invention is described below in conjunction with the accompanying drawings, preferably so as to those skilled in the art
Understand the present invention.Requiring particular attention is that in the following description, when known function and the detailed description of design perhaps
When can desalinate the main contents of the present invention, these descriptions will be ignored herein.
Embodiment
Fig. 1 is the specific implementation mode structure chart of quasi-coaxial complications ribbon beam slow-wave structure of the present invention.In order to more clearly
It shows the internal structure of the double note slow-wave structures of super wide band plane, notes quasi-coaxial complications ribbon beam slow-wave structure with electronics in Fig. 1
Place plane is that section progress subdivision obtains upper and lower two half part.Fig. 2 is the ribbon beam slow-wave structure of quasi-coaxial complications shown in Fig. 1
Lower half portion structure enlarged drawing.As depicted in figs. 1 and 2, quasi-coaxial complications ribbon beam slow-wave structure of the present invention includes metal
Shell 1, metal slow wave line 2 and two dielectric support bars 3.It is identical as conventional slow-wave structure, it can add as needed in suitable position
In addition the electron impact mouth 4 of electron gun, signal input 5 and signal output 6.
Fig. 3 is the monocycle structure chart of the ribbon beam slow-wave structure of quasi-coaxial complications shown in Fig. 1.As shown in figure 3, in the present invention
Metal shell 1 divides for internal layer 11 and outer layer 12, the use winding waveguide structure of internal layer 11.Fig. 4 is winding waveguide structural schematic diagram.Such as
Shown in Fig. 4, winding waveguide equally carries out Cyclic flexion along electric field image surface meander line, further along the axis of symmetry of slow-wave structure,
It is from first to last punched in metallic walls, forms electron beam channel.Winding waveguide is a kind of common structure in travelling-wave tubes field, in detail
Details are not described herein for thin principle and structure.In order to realize the goal of the invention of the present invention, need to change conventional winding waveguide
Into：Band-like electron beam channel is set in the plane symmetrical above and below of winding waveguide structure, and the section of electron beam channel is wrapped completely
Section is noted containing electronics, and the bending part between the two neighboring ridge piece of winding waveguide structure is provided with opening.In the present embodiment,
The curve of each bending is two quarter circular arcs and connects the straight line of the two quarter circular arcs in winding waveguide structure
Duan Zucheng.When winding waveguide structure occur details at improvement when, folding path naturally also can accordingly change.Electron beam channel
The concrete shape in section can adjust according to actual needs, and rectangle is used in the present embodiment.
Fig. 5 is the transverse cross-sectional view of the ribbon beam slow-wave structure of quasi-coaxial complications shown in Fig. 1.As shown in figs. 3 and 5, metal is slow
Swash 2 folds to obtain using metal wire, the folding path phase of folding path and the winding waveguide structure of 1 internal layer 11 of metal shell
Together, punching forms electron beam channel on the face symmetrical above and below of metal wire after folding, the electron beam channel and metal shell internal layer
Winding waveguide structure electron beam channel overlap, that is, formed an electron beam channel 7.W indicates 2 gold medal of metal slow wave line in Fig. 5
Belong to the thickness of line, w2Indicate that the length of bending part straightway in winding waveguide structure in the present embodiment, p are metal wire periodic structure
Monocycle length, weIndicate the width of electron beam channel, wcIndicate the width of electronics note, it is clear that we> wc, wdIndicate medium branch
The width of strut, L indicate the length of winding waveguide structure median ridge piece cathetus section.
As shown in Figure 3 and Figure 5, two dielectric support bars 3 are individually fixed in the internal layer 11 and outer layer 12 of 1 both sides of metal shell
Between, the opening that the surface of dielectric support bar is arranged from 11 winding waveguide structure of internal layer is exposed, with metal slow wave line 2 into
Row face contacts, and realizes and is clamped to metal slow wave line 2, metal slow wave line 2 is made to be suspended in intracavitary in metal shell 1.It can be seen that the present invention
In, metal slow wave line 2 is equivalent in the inner cavity of embedded metal shell 1.The concrete shape of dielectric support bar 3 can be according to practical need
It is configured, the straight quadrangular of rectangular cross-section is used in the present embodiment.
Fig. 6 is the longitudinal sectional drawing of the ribbon beam slow-wave structure of quasi-coaxial complications shown in Fig. 1.W indicates metal slow wave line in Fig. 6
The thickness of 2 metal wires, a indicate that the height of the internal layer 11 of metal shell 1, t are the thickness of metal wire, teIndicate electron beam channel
Thickness, tcIndicate the thickness of electronics note, it is clear that te> tc, tdIndicate the thickness of dielectric support bar.As shown in fig. 6, electric in the present invention
Winding waveguide structure and metal slow wave line are run through in son note channel.
According to the aforementioned description of this invention it is found that quasi-coaxial complications ribbon beam slow-wave structure of the present invention is considered as to one
After coaxial line is folded, in coaxial line shell (i.e. the internal layer 11 of metal shell 1), there are in the both sides metal shell of bending
Two dielectric support bars are inlayed, are insulated with metal shell with supporting coaxial inner core (i.e. metal slow wave line 2) hanging.Obviously, exist
In above structure, the shell and inner core of the coaxial line after folding are possible to that there are overlapping regions with electron beam channel.Thus, this
Invention is substantially removal in the coaxial line (include dielectric support bar) after above-mentioned folding, and it is Chong Die with electron beam channel antivacuum
Remaining structure behind region, therefore the present invention is known as quasi-coaxial complications ribbon beam slow-wave structure.
The present invention carries out metal slow wave line by using the foldable structure similar to coaxial line, and by dielectric support bar
Bilateral is clamped so that metal slow wave line insulate with metal shell, to constitute two-wire line.Basic mode is TEM in coaxial line
Pattern, due to the similitude of structure of the invention and coaxial line, basic mode equally has similitude with TEM mode, can be qualitative point
Analysis is QTEM patterns.The phase velocity of basic mode can be according to the phase velocity of the QTEM pattern electromagnetic waves transmitted along metal wire in the present invention
It is determined with the cycle parameter of periodic structure, in the case where the cycle parameter of periodic structure determines, the dispersion characteristics of slow-wave structure
It is uniquely determined by the dispersion characteristics for the QTEM pattern electromagnetic waves propagated along metal wire, and QTEM patterns have weak dispersion characteristic, institute
Wider bandwidth of operation may be implemented with the present invention.
Pattern in the present invention along the electromagnetic wave of metal slow wave line propagation is the TEM in QTEM patterns, with uniform coaxial line
Pattern has higher similitude, analyzes for convenience, and the TEM mode electric field in coaxial line can be used to substitute above-mentioned QTEM moulds
Formula electric field carries out approximate analysis.In Homogeneous Circular coaxial line, direction of an electric field is directed toward same shaft housing, electric field level by coaxial inner core
Reduce with field position to the increase of the distance of coaxial inner core, and electron beam channel passes through " inner core " in the present invention, thus electronics
It is most strong to note channel position field strength, and electric field longitudinal component is maximum.
In addition, the problem that Conventional wide band microstrip type slow-wave structure generally existing coupled impedance is relatively low, main reason is that
Wherein dielectric substance proportion in cavity is excessive, causes electric field energy to the region Li Ji that can not carry out note wave interaction
In, the electric field that passage zone is noted so as to cause electronics is smaller, according to the definition of coupled impedance it is known that the coupling in the region hinders
It is anti-relatively low.The present invention is clamped relative to conventional microstrip type slow-wave structure, using bilateral dielectric support bar into row metal slow wave line, is subtracted
Lack dielectric shared space proportion in slow-wave structure wire chamber, reduce the trend that electric field energy is concentrated into dielectric,
To realize higher coupled impedance.
Technique effect in order to better illustrate the present invention carries out simulating, verifying to the present invention.Fig. 7 is the biography of the present embodiment
Defeated characteristic Simulation result.S11 is input reflection coefficient, that is, input return loss in Fig. 7, and S21 is positive transmission coefficient,
It is exactly gain.As shown in fig. 7, in 60GHz larger frequency ranges below, the emission ratio of the present embodiment is less than -17dB, passes
Defeated characteristic is better.
Fig. 8 is the normalization phase velocity simulation result of the present embodiment.Normalization phase velocity is used to embody the color of slow-wave structure
Dissipate characteristic.As shown in figure 8, in 60GHz frequency ranges below, the electromagnetic wave of the different frequency transmitted in the present embodiment is returned
One change phase velocity variation is smaller, and being combined with Fig. 7 results can illustrate that the present invention has larger bandwidth.
Although the illustrative specific implementation mode of the present invention is described above, in order to the technology of the art
Personnel understand the present invention, it should be apparent that the present invention is not limited to the range of specific implementation mode, to the common skill of the art
For art personnel, if various change the attached claims limit and determine the spirit and scope of the present invention in, these
Variation is it will be apparent that all utilize the innovation and creation of present inventive concept in the row of protection.
Claims (4)
1. a kind of quasi-coaxial complications ribbon beam slow-wave structure, which is characterized in that including metal shell, metal slow wave line and two Jie
Matter supporting rod, wherein：
The metal shell is divided into internal layer and outer layer, and internal layer uses winding waveguide structure, in the symmetrical above and below of winding waveguide structure
Band-like electron beam channel is set in plane, and the section of electron beam channel completely includes electronics note section, and in winding waveguide knot
Bending part between the two neighboring ridge piece of structure is provided with opening；
The metal slow wave line folds to obtain using metal wire, the folding of folding path and the winding waveguide structure of metal shell internal layer
Folded road path is identical, and punching forms electron beam channel on the face symmetrical above and below of metal wire after folding, the electron beam channel and gold
The electron beam channel for belonging to the winding waveguide structure of shell internal layer overlaps；
Two dielectric support bars are individually fixed between the internal layer and outer layer of metal shell both sides, the part of dielectric support bar
The opening that side is arranged from winding waveguide structure is exposed, and carrying out face with metal slow wave line contacts, and realizes and presss from both sides to metal slow wave line
It holds, metal slow wave line is made to be suspended in intracavitary in metal shell.
2. the double note slow-wave structures of super wide band plane according to claim 1, which is characterized in that in the winding waveguide structure
The curve of each bending is two quarter circular arcs and connects the straightway composition of the two quarter circular arcs.
3. the double note slow-wave structures of super wide band plane according to claim 1, which is characterized in that the electron beam channel is cut
Face is rectangle.
4. the double note slow-wave structures of super wide band plane according to claim 1, which is characterized in that the dielectric support bar uses
The straight quadrangular of rectangular cross-section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810414280.9A CN108807113B (en) | 2018-05-03 | 2018-05-03 | Coaxial-like zigzag banded slow wave injection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810414280.9A CN108807113B (en) | 2018-05-03 | 2018-05-03 | Coaxial-like zigzag banded slow wave injection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108807113A true CN108807113A (en) | 2018-11-13 |
| CN108807113B CN108807113B (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810414280.9A Expired - Fee Related CN108807113B (en) | 2018-05-03 | 2018-05-03 | Coaxial-like zigzag banded slow wave injection structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904049A (en) * | 2019-03-22 | 2019-06-18 | 电子科技大学 | A kind of conformal micro-strip meander-line slow wave device of symmetrical ridges load |
| CN110473756A (en) * | 2019-09-12 | 2019-11-19 | 电子科技大学 | A kind of plane integrability slow-wave structure and preparation method thereof |
| CN111017865A (en) * | 2019-11-27 | 2020-04-17 | 上海交通大学 | Preparation method for terahertz folded waveguide microstructure |
| CN114203502A (en) * | 2021-12-03 | 2022-03-18 | 电子科技大学 | Ridge-loading rhombic meander line slow wave structure based on multiple medium rods |
| CN114360987A (en) * | 2022-01-06 | 2022-04-15 | 电子科技大学 | Coplanar double-V-shaped line slow wave structure suitable for backward wave tube |
| CN116031121A (en) * | 2022-12-23 | 2023-04-28 | 电子科技大学 | Plane metal sheet zigzag gap slow wave structure and processing method thereof |
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| US5332947A (en) * | 1992-05-13 | 1994-07-26 | Litton Systems, Inc. | Integral polepiece RF amplification tube for millimeter wave frequencies |
| JPH0927279A (en) * | 1995-07-12 | 1997-01-28 | Nec Corp | Traveling wave tube |
| CN101572205A (en) * | 2009-06-10 | 2009-11-04 | 电子科技大学 | Zigzag slow-wave line of double ridged waveguide |
| CN101615553A (en) * | 2009-07-22 | 2009-12-30 | 电子科技大学 | A kind of rectangular-grooved loading winding waveguide slow wave line |
| CN106340433A (en) * | 2016-10-18 | 2017-01-18 | 电子科技大学 | High-frequency structure for dielectric-embedded zigzag metal band |
| CN107180734A (en) * | 2017-06-13 | 2017-09-19 | 电子科技大学 | The angular tortuous slow wave line slow-wave structure of clamping biradial beam angle logarithm plane |
| 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 |
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2018
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Patent Citations (7)
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| US5332947A (en) * | 1992-05-13 | 1994-07-26 | Litton Systems, Inc. | Integral polepiece RF amplification tube for millimeter wave frequencies |
| JPH0927279A (en) * | 1995-07-12 | 1997-01-28 | Nec Corp | Traveling wave tube |
| CN101572205A (en) * | 2009-06-10 | 2009-11-04 | 电子科技大学 | Zigzag slow-wave line of double ridged waveguide |
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| CN107180734A (en) * | 2017-06-13 | 2017-09-19 | 电子科技大学 | The angular tortuous slow wave line slow-wave structure of clamping biradial beam angle logarithm plane |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904049A (en) * | 2019-03-22 | 2019-06-18 | 电子科技大学 | A kind of conformal micro-strip meander-line slow wave device of symmetrical ridges load |
| CN110473756A (en) * | 2019-09-12 | 2019-11-19 | 电子科技大学 | A kind of plane integrability slow-wave structure and preparation method thereof |
| CN110473756B (en) * | 2019-09-12 | 2021-03-30 | 电子科技大学 | Plane integratable slow wave structure and manufacturing method thereof |
| CN111017865A (en) * | 2019-11-27 | 2020-04-17 | 上海交通大学 | Preparation method for terahertz folded waveguide microstructure |
| CN111017865B (en) * | 2019-11-27 | 2022-09-09 | 上海交通大学 | Preparation method for terahertz folded waveguide microstructure |
| CN114203502A (en) * | 2021-12-03 | 2022-03-18 | 电子科技大学 | Ridge-loading rhombic meander line slow wave structure based on multiple medium rods |
| CN114360987A (en) * | 2022-01-06 | 2022-04-15 | 电子科技大学 | Coplanar double-V-shaped line slow wave structure suitable for backward wave tube |
| CN114360987B (en) * | 2022-01-06 | 2023-03-10 | 电子科技大学 | Coplanar double-V-shaped line slow wave structure suitable for backward wave tube |
| CN116031121A (en) * | 2022-12-23 | 2023-04-28 | 电子科技大学 | Plane metal sheet zigzag gap slow wave structure and processing method thereof |
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| CN108807113B (en) | 2020-05-26 |
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