CN204029759U - The TWT slow wave structure of the two gradual changes of a kind of shell and helix - Google Patents
The TWT slow wave structure of the two gradual changes of a kind of shell and helix Download PDFInfo
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- CN204029759U CN204029759U CN201420361746.0U CN201420361746U CN204029759U CN 204029759 U CN204029759 U CN 204029759U CN 201420361746 U CN201420361746 U CN 201420361746U CN 204029759 U CN204029759 U CN 204029759U
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Abstract
The utility model discloses the TWT slow wave structure of the two gradual changes of a kind of shell and helix, it comprises: taper composite pipe shell (1), be arranged on the straight isosceles triangle supporting rod (2) in taper composite pipe shell (1), be arranged on the coniform spiral line (3) on straight isosceles triangle supporting rod (2), taper composite pipe shell offers cone tank in (1), and the straight isosceles triangle supporting rod (2) being clamped on coniform spiral line (3) is arranged in the cone tank in taper composite pipe shell (1); Coniform spiral line (3) is the structure of pitch positive transition ~ negative saltus step ~ positive transition.The TWT slow wave structure of the two gradual changes of the shell that the utility model provides and helix, reasonable in design, there is high power, high electronic efficiency, reliable and stable, can effectively suppress backward wave oscillation, overcome the backward wave oscillation problem that in prior art, helix TWT runs into when realizing high power, can greatly improve the performance of helix TWT.
Description
Technical field
The utility model relates to a kind of travelling wave tube, is specifically related to the TWT slow wave structure of the two gradual changes of a kind of shell and helix.
Background technology
Helical slow-wave structure is the core component of travelling wave tube.Helix TWT has wide band characteristic, makes helix TWT in very wide frequency band, to amplify microwave, is widely used in modern military field, and its performance level directly determines the level that dressing is standby.Along with the fast development of modern microwave electronic technology and space technology, in a lot of microwave systems and military field, active demand has the travelling wave tube that high power, high efficiency, broadband and volume are little.Yet traditional straight helix structure is easy to backward wave oscillation under high-voltage large current, be difficult to meet the high-power demand of change system.Helix TWT is due to its intrinsic dispersion characteristics, when ka value reaches certain value (ka >=0.33, slow wave line voltage ≈ 11kV), the coupling impedance of-1 backward wave increases, first-harmonic coupling impedance declines, when at π point (ka=0.5), first-harmonic equates with the coupling impedance of backward wave, and under these conditions, backward wave oscillation appears in pipe.
Therefore, necessary on the basis of prior art, a kind of novel TWT slow wave structure that can effectively suppress backward wave oscillation of design research and development.
Summary of the invention
Goal of the invention: the purpose of this utility model is in order to solve the deficiencies in the prior art, provides a kind of reasonable in design, has high power, high electronic efficiency, highly reliable shell and the TWT slow wave structure of the two gradual changes of helix.The TWT slow wave structure that the utility model provides can effectively solve the backward wave oscillation problem that conventional helical line travelling wave tube runs into when realizing high power, can greatly improve the performance level of helix TWT.
Technical scheme: in order to realize above object, technical solution adopted in the utility model is:
The TWT slow wave structure of the two gradual changes of a kind of shell and helix, it comprises: taper composite pipe shell, be arranged on the straight isosceles triangle supporting rod in taper composite pipe shell, be arranged on the coniform spiral line on straight isosceles triangle supporting rod, in described taper composite pipe shell, offer cone tank, the straight isosceles triangle supporting rod being clamped on coniform spiral line is arranged in the cone tank in taper composite pipe shell;
Described coniform spiral line is the structure of pitch positive transition ~ negative saltus step ~ positive transition.
The utility model screens by great many of experiments, adopt the combination of preferred pitch, can realize synchronizeing of microwave and electron beam in slow wave structure, and adopt preferred pitch hopping structures, can improve electronic efficiency, and be conducive to suppress backward wave oscillation and improve dynamic electron beam passband.
The TWT slow wave structure of the two gradual changes of the shell that the utility model provides and helix, is provided with connecting plate between described taper composite pipe shell and straight isosceles triangle supporting rod.Connecting plate can guarantee the contact of coniform spiral line and straight isosceles triangle supporting rod, is conducive to radio frequency system heat radiation.
The TWT slow wave structure of the two gradual changes of the shell that the utility model provides and helix, straight isosceles triangle supporting rod has the insulating properties between assurance coniform spiral line and taper composite pipe shell assembly and plays a supporting role.
The TWT slow wave structure of the two gradual changes of the shell that the utility model provides and helix, taper composite pipe shell inside offers cone tank, can be coniform spiral line and straight isosceles triangle supporting rod provides stable rigging position, adopt taper composite pipe shell, output becomes large shell and is conducive to improve output coupling impedance, guarantees homogeneous tube bandwidth, gain and electronic efficiency.
Beneficial effect: the TWT slow wave structure of the two gradual changes of the shell that the utility model provides and helix compared with prior art has the following advantages:
The TWT slow wave structure of the two gradual changes of the shell that the utility model provides and helix, reasonable in design, there is high power, high electronic efficiency, reliable and stable, can effectively suppress backward wave oscillation, overcome the backward wave oscillation problem that in prior art, helix TWT runs into when realizing high power, can greatly improve the performance of helix TWT.
Accompanying drawing explanation
The schematic diagram of the TWT slow wave structure of the two gradual changes of the shell that Fig. 1 provides for the utility model and helix.
embodiment:
Below in conjunction with the drawings and specific embodiments, further illustrate the utility model, should understand these embodiment and only for the utility model is described, be not used in restriction scope of the present utility model, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present utility model.
As shown in Figure 1, the TWT slow wave structure of the two gradual changes of a kind of shell and helix, it comprises: taper composite pipe shell (1), be arranged on the straight isosceles triangle supporting rod (2) in taper composite pipe shell (1), be arranged on the coniform spiral line (3) on straight isosceles triangle supporting rod (2), in described taper composite pipe shell (1), offer cone tank, the straight isosceles triangle supporting rod (2) being clamped on coniform spiral line (3) is arranged in the cone tank in taper composite pipe shell (1);
Described coniform spiral line (3) is the structure of pitch positive transition ~ negative saltus step ~ positive transition.
The TWT slow wave structure of the two gradual changes of above-described shell and helix, is provided with connecting plate (4) between described taper composite pipe shell (1) and straight isosceles triangle supporting rod (2).
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (2)
1. the TWT slow wave structure of the two gradual changes of a shell and helix, it is characterized in that, it comprises: taper composite pipe shell (1), be arranged on the straight isosceles triangle supporting rod (2) in taper composite pipe shell (1), be arranged on the coniform spiral line (3) on straight isosceles triangle supporting rod (2), in described taper composite pipe shell (1), offer cone tank, the straight isosceles triangle supporting rod (2) being clamped on coniform spiral line (3) is arranged in the cone tank in taper composite pipe shell (1);
Described coniform spiral line (3) is the structure of pitch positive transition ~ negative saltus step ~ positive transition.
2. the TWT slow wave structure of the two gradual changes of shell according to claim 1 and helix, is characterized in that, between described taper composite pipe shell (1) and straight isosceles triangle supporting rod (2), is provided with connecting plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420361746.0U CN204029759U (en) | 2014-07-02 | 2014-07-02 | The TWT slow wave structure of the two gradual changes of a kind of shell and helix |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420361746.0U CN204029759U (en) | 2014-07-02 | 2014-07-02 | The TWT slow wave structure of the two gradual changes of a kind of shell and helix |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204029759U true CN204029759U (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420361746.0U Active CN204029759U (en) | 2014-07-02 | 2014-07-02 | The TWT slow wave structure of the two gradual changes of a kind of shell and helix |
Country Status (1)
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| CN (1) | CN204029759U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109192639A (en) * | 2018-08-10 | 2019-01-11 | 安徽华东光电技术研究所有限公司 | For travelling tube helical line slow-wave structure |
-
2014
- 2014-07-02 CN CN201420361746.0U patent/CN204029759U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109192639A (en) * | 2018-08-10 | 2019-01-11 | 安徽华东光电技术研究所有限公司 | For travelling tube helical line slow-wave structure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |