CN202940212U - Slow wave structure used for traveling wave tube - Google Patents
Slow wave structure used for traveling wave tube Download PDFInfo
- Publication number
- CN202940212U CN202940212U CN201220529665.8U CN201220529665U CN202940212U CN 202940212 U CN202940212 U CN 202940212U CN 201220529665 U CN201220529665 U CN 201220529665U CN 202940212 U CN202940212 U CN 202940212U
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- outer conductor
- slow wave
- wave structure
- inner wire
- conductor
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Abstract
The utility model discloses a slow wave structure used for a traveling wave tube. The slow wave structure comprises an outer conductor (1) and an inner conductor (2) which are in coaxial arrangement. The outer conductor (1) is at the periphery of the inner conductor (2), and the outer conductor (1) and the inner conductor (2) are not in contact. Two ends of each of the outer conductor (1) and the inner conductor (2) are supported through ceramics (3). An insulation state is formed between the outer conductor (1) and the inner conductor (2). Edges of the outer conductor (1) and the inner conductor (2) are provided with channels through which a plurality of electron beams pass. The outer conductor (1) and the inner conductor (2) are connected with different potentials respectively, an electrostatic field is formed, and the electron beams are focused. Both the outer conductor (1) and the inner conductor (2) are made of full metal with good heat radiation condition, and the slow wave structure with the above structure used for the traveling wave tube has a wide bandwidth and a large power capacity.
Description
Technical field
The utility model relates to the microwave vacuum devices field, especially relates to a kind of slow wave structure for travelling wave tube.
Background technology
In the microwave vacuum devices field, travelling wave tube is most widely used device.Travelling wave tube has extensively adopted two kinds of slow wave systems, i.e. helical line slow-wave structure and Hughes's type coupling cavity structure slow wave structure since being born.Helical line slow-wave structure has with wide characteristics, but power capacity is little, is applicable to the broadband medium power and low power tranvelling wave tube; Hughes's type Coupled-Cavity Slow Wave has advantages of high power capacity, but bandwidth is narrower, and generally below 10%, this also just causes two kinds of slow wave structures all to have in use limitation.Therefore, not only had wide bandwidth but also the slow wave structure of high power capacity is arranged is the target sought of travelling wave tube researcher and the content of research always.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of slow wave structure for travelling wave tube for problems of the prior art, its objective is that this kind slow wave structure not only has wide bandwidth but also have high power capacity.
The technical solution of the utility model is that this kind comprises outer conductor and the inner wire of coaxial arrangement for the slow wave structure of travelling wave tube, outer conductor is positioned at the periphery of inner wire, and do not contact between outer conductor and inner wire, two ends by ceramic support, are only state of insulation between outer conductor and inner wire; The edge of described outer conductor and inner wire is equipped with the passage that passes through for many notes electron beams.
Described outer conductor and inner wire respectively connect different current potentials, form electrostatic field, to Electron Beam Focusing.
The all-metal that it is good that described outer conductor and inner wire are radiating condition is made.
The slow wave structure that this kind with said structure is used for travelling wave tube has the following advantages:
1. this kind has solved the arrangement problems of coaxial radial transmission line slow wave structure electron channel for the slow wave structure of travelling wave tube, use the passages of annotating at the edge more, coaxial radial transmission line slow wave structure engineering is used become possibility, adopt perveance and the gain parameters that electron beam can increase travelling wave tube of annotating more, improve the efficient of travelling wave tube, reduce the volume of travelling wave tube, reduce the operating voltage of travelling wave tube.
2. this kind is used for the slow wave structure employing electrostatic focusing mode of travelling wave tube to Electron Beam Focusing, between the inner wire of slow wave structure and outer conductor owing to not contacting, be in electric insulating state, can adopt the electrostatic focusing mode to Electron Beam Focusing, inner wire, outer conductor connect different current potentials, form electrostatic field, to Electron Beam Focusing; Slow wave structure self forms electrostatic focusing, does not need to increase in addition electrostatic focusing field.Owing to adopting electrostatic field to focus on, be compared to magnetic field and assemble, save permanent magnet, magnetic conductor, magnet shielding structure, reduced size and the weight of slow wave structure, provide cost savings.
3. this kind is used for the coaxial radial transmission line of slow wave structure use of travelling wave tube as slow wave structure, be characterized in bandwidth, can be all in transmission range from the direct current to the high frequency, slow wave structure is all-metal construction, radiating condition is good, both can be used as the medium power and low power tranvelling wave tube slow wave structure, also can be used as the high power travelling wave tube slow wave structure.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the left view of structure shown in Figure 1.
In Fig. 1-2,1: outer conductor; 2: inner wire; 3: pottery; 4: passage.
Embodiment
By the combination of structure shown in Fig. 1-2 as can be known, this kind comprises outer conductor 1 and the inner wire 2 of coaxial arrangement for the slow wave structure of travelling wave tube, outer conductor 1 is positioned at the periphery of inner wire 2, and do not contact between outer conductor 1 and inner wire 2, two ends are only supported by pottery 3, are state of insulation between outer conductor 1 and inner wire 2; The edge of outer conductor 1 and inner wire 2 is equipped with many notes passage 4 of annotating electron beam and electromagnetic field mutual effect for more, solved the arrangement problems of coaxial radial transmission line slow wave structure electron channel, there is conductor at coaxial radial transmission line slow wave structure center, can not be as electron channel, use the passages of annotating at the edge, coaxial radial transmission line slow wave structure engineering is used becomes possibility more.Adopt perveance and the gain parameters that electron beam can increase travelling wave tube of annotating more, improve the efficient of travelling wave tube, reduce the volume of travelling wave tube, reduce the operating voltage of travelling wave tube.The quantity of electron channel, position etc. can specifically according to the frequency of working, slow wave structure size, operating voltage, electric current etc. be determined.
Owing to not contacting, be in electric insulating state between the inner wire 2 of slow wave structure and outer conductor 1, can adopt the electrostatic focusing mode to Electron Beam Focusing.Inner wire 2, outer conductor 1 connect different current potentials, form electrostatic field, utilize this electrostatic field to Electron Beam Focusing.Utilize the slow wave structure own characteristic to form electrostatic focusing, do not need to increase in addition electrostatic focusing field.Owing to adopting electrostatic field to focus on, be compared to magnetic field and assemble, save permanent magnet, magnetic conductor, magnet shielding structure, reduced size and the weight of slow wave structure, provide cost savings.Generally outer conductor is in high potential, and inner wire is in electronegative potential, and the homogeneous tube Insulation Problems easily solves, and is safe.Inner wire can keep idiostatic with negative electrode, and the homogeneous tube structure is relatively simple.
Use coaxial radial transmission line as slow wave structure, be characterized in bandwidth, can be all in transmission range from the direct current to the high frequency.Slow wave structure can adopt different radiating modes as required, as, can connect different radiating conditions in outer conductor 1 outside, as water-cooled, the different form such as air-cooled, conduction is cooling, satisfy different instructions for uses; Can be processed into hollow pipe in the middle of inner wire 2, lead to liquid cools, further improve the power output of travelling wave tube.
This slow wave structure can use the bandreject filtering mode to cut off slow wave line, uses the ways such as body absorber, distribution losses to regulate slow wave structure standing-wave ratio and loss; By increasing the length of slow wave structure, increase the gain of travelling wave tube.
Claims (3)
1. slow wave structure that is used for travelling wave tube, it is characterized in that: described slow wave structure comprises outer conductor (1) and the inner wire (2) of coaxial arrangement, outer conductor (1) is positioned at the periphery of inner wire (2), and do not contact between outer conductor (1) and inner wire (2), two ends are only supported by pottery (3), are state of insulation between outer conductor (1) and inner wire (2); The edge of described outer conductor (1) and inner wire (2) is equipped with the passage (4) that passes through for a plurality of electron beams.
2. a kind of slow wave structure for travelling wave tube according to claim 1, it is characterized in that: described outer conductor (1) is connected 2 with inner wire) connect respectively different current potentials, form electrostatic field, to Electron Beam Focusing.
3. a kind of slow wave structure for travelling wave tube according to claim 2 is characterized in that: described outer conductor (1) and inner wire (2) are radiating condition good all-metal are made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220529665.8U CN202940212U (en) | 2012-10-17 | 2012-10-17 | Slow wave structure used for traveling wave tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220529665.8U CN202940212U (en) | 2012-10-17 | 2012-10-17 | Slow wave structure used for traveling wave tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202940212U true CN202940212U (en) | 2013-05-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220529665.8U Expired - Fee Related CN202940212U (en) | 2012-10-17 | 2012-10-17 | Slow wave structure used for traveling wave tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202940212U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108780724A (en) * | 2016-03-10 | 2018-11-09 | Nec网络传感器系统株式会社 | Slow wave circuit |
| CN114005720A (en) * | 2021-11-09 | 2022-02-01 | 北京航空航天大学 | Terahertz traveling wave tube slow wave focusing integrated structure and manufacturing method thereof |
-
2012
- 2012-10-17 CN CN201220529665.8U patent/CN202940212U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108780724A (en) * | 2016-03-10 | 2018-11-09 | Nec网络传感器系统株式会社 | Slow wave circuit |
| US10490382B2 (en) | 2016-03-10 | 2019-11-26 | Nec Network And Sensor Systems, Ltd. | Slow-wave circuit |
| CN114005720A (en) * | 2021-11-09 | 2022-02-01 | 北京航空航天大学 | Terahertz traveling wave tube slow wave focusing integrated structure and manufacturing method thereof |
| CN114005720B (en) * | 2021-11-09 | 2022-10-14 | 北京航空航天大学 | Terahertz traveling wave tube slow wave focusing integrated structure and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20211017 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |