CN110335797A - A kind of helical line for travelling wave tube slow-wave structure - Google Patents
A kind of helical line for travelling wave tube slow-wave structure Download PDFInfo
- Publication number
- CN110335797A CN110335797A CN201910610635.6A CN201910610635A CN110335797A CN 110335797 A CN110335797 A CN 110335797A CN 201910610635 A CN201910610635 A CN 201910610635A CN 110335797 A CN110335797 A CN 110335797A
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- Prior art keywords
- wave
- metal loading
- helical line
- slow
- helix
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- 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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Abstract
The invention discloses a kind of helical line for travelling wave tube slow-wave structures, Metal loading structure one end is connect by welding with ceramic supporting rod, the other end is connect with Can, thus heat conductivity is greatly improved, and the influence due to Metal loading structure to dispersion, dispersion are weaker, dispersion curve is more flat, compared to only significantly increasing bandwidth of operation with the helical line slow-wave structure of ceramic supporting rod, meanwhile, coupled impedance is not substantially reduced.Since Metal loading structure is combined together with ceramic supporting rod radially, angular structure is simple, and assembly space relative loose is easily assembled, is also easily guaranteed that assembly precision.The slow-wave structure is especially suitable for millimeter wave frequency band.
Description
Technical field
The invention belongs to vacuum electron device technical fields, more specifically, are related to a kind of note-wave interaction of travelling-wave tubes
With structure: helical line slow-wave structure.
Background technique
Slow-wave structure directly determines travelling-wave tubes as travelling-wave tubes note-wave interaction core component, performance superiority and inferiority
Technical level.
Helical line slow-wave structure travelling-wave tubes is widely used in needing the radar of broadband operation, electronic countermeasure, satellite communication
Equal fields.For coupled-cavity TWT, helical line slow-wave structure dispersion is weak, and electronics note can be in very wide frequency range
Interior and electromagnetic wave positive energy exchange, thus helical line slow-wave structure is broad-band TWT especially octave traveling wave tube slow-wave system
Only selection.
Fig. 1 is the schematic diagram of existing helical line slow-wave structure, and Fig. 2 is the sectional view of helical line slow-wave structure shown in Fig. 1.Such as
Fig. 1, shown in 2, existing helical line slow-wave structure include shell 1, the helix 3 coaxial with shell and helix 3 and shell 1 it
Between symmetrically placed three ceramic supporting rods 2, the shape of ceramic supporting rod 2 can be rectangle, is also possible to round, fan-shaped, T shape
Equal various shapes.
Existing broadband helical line slow-wave structure travelling-wave tubes in order to make the dispersion curve of high-frequency structure become more flat, thus
Bandwidth is further expanded, is usually all by introducing longitudinal load, the metal tab of angular distribution or Metal loading structure 4 come real
Existing.Metal loading structure 4 generally with ceramic supporting rod 2 in travelling-wave tubes cross section alternate intervals and in angular symmetrical,
I.e. Metal loading structure 4 is located at the region between two ceramic supporting rods 2, as shown in Figure 3.Metal loading structure 4 in Fig. 3
Section is sector structure.
Other than ceramic supporting rod 2 can be various shapes, Metal loading structure 4 is also possible to various shapes, and two
Metal loading structure 4 between ceramic supporting rod 2 even can be with more than one, as shown in Figure 4.Metal loading structure 4 is in Fig. 4
Section is the fin of rectangular strip structure.
As travelling-wave tubes involves the development of higher frequency section to millimeter, the sectional dimension of device will become very small, traditional spiral shell
Spin line slow-wave structure will face great difficulty and the challenge of Precision Machining and assembly.Metal loading structure as shown in figure 3 or 4
Helical line slow-wave structure, with Metal loading structure 4 in angular gap very little, assembly precision requires high ceramic supporting rod 2.
Therefore, it is necessary to a kind of suitable work in millimeter wave frequency band, and both meeting bandwidth requirement, structure is simpler simultaneously, the spiral being easily assembled
Line slow-wave structure.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, propose a kind of helical line for travelling wave tube slow-wave structure,
Metal loading structure can make the dispersion curve of helical line slow-wave structure more flat, to be able to expand on the basis of bandwidth, make
Structure is simply easily assembled.
For achieving the above object, helical line for travelling wave tube slow-wave structure of the present invention, including Can and metal tube
Shell is coaxial and is located at the helix at Can center, which is characterized in that further include:
The clamp structure being welded as a whole, entire end face and single pottery of the every Metal loading structure towards one side of helix
It is coated with the corresponding surface welding of active metallization coating on porcelain supporting rod, forms the clamp structure of an entirety, it is opposite with welding surface
The ceramics clamping rod end surface contact helix not metallized, and Metal loading structure one end and Can far from helix
It is connected.
Goal of the invention of the invention is achieved in that
Helical line for travelling wave tube slow-wave structure of the present invention connects Metal loading structure one end by welding and ceramic supporting rod
It connecing, the other end is connect with Can, thus heat conductivity is greatly improved, and the influence due to Metal loading structure to dispersion,
Dispersion curve is more flat, compared to only significantly increasing bandwidth of operation with the helical line slow-wave structure of ceramic supporting rod, meanwhile, coupling
Impedance is closed not to be substantially reduced.Since Metal loading structure is combined together with ceramic supporting rod radially, angular structure letter
Single, assembly space relative loose is easily assembled, and is also easily guaranteed that assembly precision, thus the slow-wave structure is especially suitable for millimeter wave
Frequency range.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing helical line for travelling wave tube slow-wave structure；
Fig. 2 is the sectional view of helical line for travelling wave tube slow-wave structure shown in Fig. 1；
Fig. 3 is a kind of structural schematic diagram of existing Metal loading helical line slow-wave structure；
Fig. 4 is another structural schematic diagram of existing Metal loading helical line slow-wave structure；
Fig. 5 is a kind of structural schematic diagram of specific embodiment of helical line for travelling wave tube slow-wave structure of the present invention；
Fig. 6 is the sectional view of helical line for travelling wave tube slow-wave structure shown in Fig. 5；
Fig. 7 is the structural schematic diagram for the clamp structure being welded as a whole shown in Fig. 5；
Fig. 8 is ceramics supporting rod shown in Fig. 5 and Metal loading structure welding schematic diagram；
Fig. 9 is the dispersion characteristic curve figure of helical line for travelling wave tube slow-wave structure shown in Fig. 5；
Figure 10 is the coupled impedance curve graph of helical line for travelling wave tube slow-wave structure shown in Fig. 5；
Figure 11 is the phase velocity curve graph of helical line for travelling wave tube slow-wave structure shown in Fig. 5.
Specific embodiment
A specific embodiment of the invention is described with reference to the accompanying drawing, 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 main contents of the invention, these descriptions will be ignored herein.
Fig. 5 is a kind of structural schematic diagram of specific embodiment of helical line for travelling wave tube slow-wave structure of the present invention.
In the present embodiment, as shown in figure 5, helical line for travelling wave tube slow-wave structure of the present invention includes Can 1 and gold
Belong to shell 1 coaxially and is located at the helix 3 and three clamp structures being welded as a whole at 1 center of Can；
Every Metal loading structure 4 is active towards applying on the entire end face of one side of helix and single ceramic supporting rod 2
Metalized coated corresponding surface welding, forms the clamp structure of an entirety, the ceramics folder that does not metallize opposite with welding surface
2 end face of bar contact helix 3 is held, the one end of Metal loading structure 4 far from helix 3 is connected with Can 1.
In the present embodiment, as shown in figure 5, Metal loading structure 4 is rectangular metal loading structure, ceramic supporting rod 2 is
The rectangular ceramic supporting rod of width same as rectangular metal loading structure, rectangular metal loading structure and rectangular ceramic supporting rod exist
Angular distribution position is identical on helix cross section.
In the present embodiment, as shown in figure 5, three clamp structures being welded as a whole on helix cross section about spiral shell
Spin line is angularly in 120 degree symmetrical.
In the present embodiment, as shown in figure 5, on Can 1 there are three it is angular it is symmetrical for being fixedly welded be one
The groove of the clamp structure of body, can also be by welding so that the clamp structure being welded as a whole is integrally formed with Can 1.
The Metal loading structure 4 is not limited to rectangle, is also possible to other any common Metal loading structures, such as circle
Shape, T shape, sector etc.；Ceramics clamping rod structure is also not necessarily limited to rectangle, can be a variety of common clampings such as circle, sector, T shape
Rod-shape.
Fig. 6 is the sectional view of helical line for travelling wave tube slow-wave structure shown in Fig. 5.
In the present embodiment, as shown in fig. 6, helical line for travelling wave tube slow-wave structure by Can 1, ceramic supporting rod 2,
Helix 3 and the Metal loading structure 4 between Can 1 and ceramic supporting rod 2 are constituted.
In the helical line for travelling wave tube slow-wave structure, r1 is helix internal diameter, and r2 is helix outer diameter, and r3 is Can
Inside radius, the Metal loading structure 4 of rectangle are first welded as a whole with the ceramic supporting rod 2 of rectangle, wherein ceramic supporting rod 2 exists
Radial height is h2, and the height on ceramic 2 another side of rectangular section of supporting rod is W2, and the Metal loading structure 4 of rectangle exists
Radial height is h1, and the height of another rectangular edges is W1.In the present embodiment, W1=W2, and be straight line, but in other feelings
Under condition, the two may be camber line or unequal.
Helical line for travelling wave tube slow-wave structure of the present invention first carries out 201 sides of ceramic supporting rod 2 unilateral in processing
Metallization, then welded with 401 sides of Metal loading structure 4, finally by Metal loading structure 4 far from helix 3 one
In the groove 101 held successfully in advance on 402 a part push-in Cans 1 at end, Fig. 7 and Fig. 8 give ceramic supporting rod 2 and gold
Belong to the schematic diagram and welding position that loading structure 4 is welded as a whole.
In the present embodiment, the specific structure of helical line for travelling wave tube slow-wave structure of the present invention is having a size of (unit: mm): W1
=0.38mm, h1=0.93mm, material are copper.W2=0.38mm, h2=0.4mm, material are boron nitride.
The dispersion characteristics of the helical line slow-wave structure are calculated, as a result as shown in figure 9, and by itself and common spiral
The comparison of line slow-wave structure dispersion curve.Curve 1 is that the dispersion characteristics of helical line for travelling wave tube slow-wave structure of the present invention are bent in Fig. 9
Line, curve 2 are helix size r1 and shell inside radius size r3 and the consistent common existing helix slow-wave knot of the present embodiment
The dispersion characteristic curve of structure (shown in Fig. 1).From the comparison of curve 1 and curve 2, it is apparent that the effective spiral of traveling wave of the present invention
Line slow-wave structure has more flat dispersion curve than existing helical line slow-wave structure, it is meant that when carrying out note wave interaction,
Electronics can give energy to electromagnetic field of high frequency in broader frequency range, to expand the bandwidth of travelling-wave tubes.
Curve 3 is the coupled impedance of helical line for travelling wave tube slow-wave structure of the present invention in Figure 10, and curve 4 is same frequency range
The coupled impedance curve of angular Metal loading helical line slow-wave structure.Its Metal loading shape is also rectangle, and height and width
It is consistent with the embodiment of the present invention.From curve 3 and curve 4 comparison as can be seen that helical line for travelling wave tube slow-wave structure of the present invention and
Fig. 3 structure is compared, and only in low frequency end coupled impedance difference, and in higher frequency band, the coupled impedance of the two is very close.
Curve 5 is the phase velocity curve of helical line for travelling wave tube slow-wave structure of the present invention in Figure 11, and curve 6 is same frequency range
Angular Metal loading helical line slow-wave structure phase velocity curve.Find out from the comparison of curve 5 and curve 6, travelling-wave tubes of the present invention
Phase velocity with helical line slow-wave structure ratio Fig. 3 structure is lower, this illustrates that structure of the invention can work at lower voltages, and
Bandwidth almost quite even can be wider.
As it can be seen that helical line for travelling wave tube slow-wave structure of the present invention is not obviously dropped in guarantee bandwidth broadning (raising), power
More more compact in angular structure than existing Metal loading helical line slow-wave structure under the premise of low, Metal loading structure is not required to
It to be assembled in angular gap again, thus structure is simply easily assembled, and is suitably applied in millimere-wave band broad-band TWT
In.
Although the illustrative specific embodiment 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 embodiment, 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 column of protection.
Claims (3)
1. a kind of helical line for travelling wave tube slow-wave structure, including it is Can, coaxial with Can and be located in Can
The helix of the heart, which is characterized in that further include:
The clamp structure being welded as a whole, every Metal loading structure are pressed from both sides towards the entire end face of one side of helix and single ceramics
Hold be coated on bar active metallization coating corresponding surface welding, form the clamp structure of an entirety, it is opposite with welding surface not
The ceramics clamping rod end surface of metallization contacts helix, and Metal loading structure is connected far from one end of helix with Can.
2. helical line for travelling wave tube slow-wave structure according to claim 1, which is characterized in that the Metal loading structure is
Rectangular metal loading structure, the rectangular ceramic supporting rod that ceramic supporting rod is width same as rectangular metal loading structure, rectangle
The angular distribution position on helix cross section is identical with rectangular ceramic supporting rod for Metal loading structure；
Three clamp structures being welded as a whole on helix cross section about helix angle in 120 degree it is symmetrical；
It is angular symmetrical there are three on Can, for being fixedly welded the groove for the clamp structure being integrated, weldering can be passed through
It connects so that the clamp structure being welded as a whole is integrally formed with Can.
3. helical line for travelling wave tube slow-wave structure according to claim 1, which is characterized in that the Metal loading structure is not
It is limited to rectangle, is also possible to other any common Metal loading structures, such as round, T shape, sector, ceramic supporting rod knot
Structure is also not necessarily limited to rectangle, can be a variety of common clamping rod-shapes such as circle, sector, T shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910610635.6A CN110335797A (en) | 2019-07-08 | 2019-07-08 | A kind of helical line for travelling wave tube slow-wave structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910610635.6A CN110335797A (en) | 2019-07-08 | 2019-07-08 | A kind of helical line for travelling wave tube slow-wave structure |
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| CN110335797A true CN110335797A (en) | 2019-10-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690088A (en) * | 2019-10-16 | 2020-01-14 | 南京三乐集团有限公司 | Assembly method of helix traveling wave tube high-frequency circuit |
| CN111243921A (en) * | 2020-02-12 | 2020-06-05 | 电子科技大学 | Metal loading helix slow wave structure |
| CN111584324A (en) * | 2019-12-07 | 2020-08-25 | 安盛德智能装备(深圳)有限公司 | Traction device for assembling spiral line and clamping rod |
| CN114864360A (en) * | 2022-05-17 | 2022-08-05 | 电子科技大学 | Ultra-wideband helix traveling wave tube and helix slow wave structure thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690088A (en) * | 2019-10-16 | 2020-01-14 | 南京三乐集团有限公司 | Assembly method of helix traveling wave tube high-frequency circuit |
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| CN111584324A (en) * | 2019-12-07 | 2020-08-25 | 安盛德智能装备(深圳)有限公司 | Traction device for assembling spiral line and clamping rod |
| CN111243921A (en) * | 2020-02-12 | 2020-06-05 | 电子科技大学 | Metal loading helix slow wave structure |
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| CN114864360A (en) * | 2022-05-17 | 2022-08-05 | 电子科技大学 | Ultra-wideband helix traveling wave tube and helix slow wave structure thereof |
| CN114864360B (en) * | 2022-05-17 | 2023-06-09 | 电子科技大学 | Ultra-wideband helix traveling wave tube and helix slow wave structure thereof |
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