CN2158575Y - Cathode of carcinotron of millimeter wave - Google Patents
Cathode of carcinotron of millimeter wave Download PDFInfo
- Publication number
- CN2158575Y CN2158575Y CN 93236520 CN93236520U CN2158575Y CN 2158575 Y CN2158575 Y CN 2158575Y CN 93236520 CN93236520 CN 93236520 CN 93236520 U CN93236520 U CN 93236520U CN 2158575 Y CN2158575 Y CN 2158575Y
- Authority
- CN
- China
- Prior art keywords
- cathode
- millimeter wave
- carcinotron
- tungsten powder
- small hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to the cathode of the carcinotron of the millimeter wave, which adopts the solution of the hollow electronic beam. The cathode of the carcinotron of the millimeter wave is composed of a cathode cylinder, tungsten powder, and a molybdenum pin. The cathode cylinder adopts the column-shaped structure; one end of the cathode cylinder is a large hole along the shaft line, and the other end of the cathode cylinder is a small hole. The central shaft position of the small hole is provided with the molybdenum pin, and the internal part of the small hole and the internal part of the large hole close to the small hole are pressed with the tungsten powder. The end surface of the cathode is a smooth circular emitting surface, and the appearance of the cathode head is in step-shaped. The cathode of the carcinotron of the millimeter wave has the advantages of simple manufacture technology, small size, large emitting current density, and high production yield. The cathode of the carcinotron of the millimeter wave can obtain major output power in the carcinotron of the millimeter wave.
Description
The utility model is a kind of negative electrode that is applicable to Millimeter Wave Tube, belongs to the vacuum electron device technical field.
Backward wave tube is a kind of wide band oscillate, and it has broad electronic tuning frequency band, is the ideal signal source of swept signal generator, local oscillator.The superhigh frequency band backward wave tube is owing to frequency lower (comparing with millimeter wave), and pipe inner cathode size is bigger, makes no much difficulties.But when backward wave tube works in millimere-wave band, require cathode size very little (external diameter is less than 1mm), and the very big (2～3A/cm of current density
2), existing backward wave tube negative electrode is difficult to realize the requirement of small size, high current density.
The purpose of this utility model is at the deficiencies in the prior art, and a kind of millimeter wave backward wave tube negative electrode is provided, and it can realize the function of small size and high current density.
Electronics in the backward wave tube is annotated normally parallel streamer, be that cathode emission face is identical with electronics notes cross section, in millimere-wave band, because frequency is very high, in order to improve the interaction impedance of electronics and ripple, reduce starting oscillation current, increase power output, the utility model adopts the hollow beam scheme, and promptly electronics notes cross section is an annular.Sign in cathode size very little, the not enough 1mm of its diameter, if the scheme of following conventional lines is directly suppressed so circlet shape surface of emission impregnated cathode, difficulty on the technology, difficult quality guarantee, rate of finished products are extremely low.The utility model has designed a kind of special structure, it is made of cathode tube, tungsten powder and molybdenum pin, be characterized in that cathode tube adopts cylindrical structural, along axis one end is macropore, the other end is an aperture, a molybdenum pin is equipped with in aperture central shaft position, is pressed into tungsten powder in aperture and near in the macropore of aperture.
The utility model compared with prior art, characteristics such as it is simple to have manufacture craft, and even, the closely knit and emission of the cathode plane of making is big can be made the hollow notes negative electrode of diameter less than 1mm, electronics is annotated the quality height, it is higher to make rate of finished products.
Fig. 1 is a structural representation of the present utility model; Fig. 2 is the AA generalized section of Fig. 1.
The utility model can take scheme shown in the drawings to realize.Require to determine the size of cathode tube (1) and molybdenum pin (3) according to hollow dimensioning, can adopt Vehicle Processing to make a cylindrical cathode tube (1), on axis, make a call to a hole, its aperture equals the external diameter of desired hollow notes, add the concentricity that should guarantee hole and cathode cylinder man-hour, by the internal diameter Vehicle Processing molybdenum pin of hollow notes, the processing back is cleaned and is deoiled, and adorns mould then again.Earlier the molybdenum pin is put into the bed die centre bore of (being made up of two semicircles), cover guided mode, push cathode tube, tungsten powder (2) (containing paraffin wax and the tungsten powder that mixes that does not contain paraffin wax) the about 2-3mm of tungsten powder thickness in macropore that pours the drying processing into gets final product, pressurization retreats mould, eject cathode tube, constitute cathode tube---molybdenum needle assemblies this moment, again this assembly put into the hydrogen-burning stove sintering.In order to improve emission, can adopt scandate target head to carry out impregnation process.Molybdenum pin and the superincumbent unnecessary salt car of accumulation that to give prominence to cathode surface at last go, and make the negative electrode end face become the smooth smooth annular surface of emission.For the surface of emission can be stretched in the focusing electrode hole, cathode taps profile car can be become step.Prepared negative electrode is used in eight millimeters backward wave tubes, enough big electric current can be provided, annular hollow notes shape is good, and pipe has obtained bigger power output.
Claims (3)
1, a kind of millimeter wave backward wave tube negative electrode is made of cathode tube, tungsten powder and molybdenum pin, it is characterized in that cathode tube adopts cylindrical structural, along axis one end is macropore, the other end is an aperture, and a molybdenum pin is equipped with in aperture central shaft position, is pressed into tungsten powder in aperture and near in the macropore of aperture.
2, Millimeter Wave Tube negative electrode according to claim 1 is characterized in that the negative electrode end face is the smooth smooth annular surface of emission.
3, millimeter wave backward wave tube negative electrode according to claim 1 and 2 is characterized in that the cathode taps profile is a step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93236520 CN2158575Y (en) | 1993-03-27 | 1993-03-27 | Cathode of carcinotron of millimeter wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93236520 CN2158575Y (en) | 1993-03-27 | 1993-03-27 | Cathode of carcinotron of millimeter wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2158575Y true CN2158575Y (en) | 1994-03-09 |
Family
ID=33811681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93236520 Expired - Fee Related CN2158575Y (en) | 1993-03-27 | 1993-03-27 | Cathode of carcinotron of millimeter wave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2158575Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101075515B (en) * | 2007-06-28 | 2011-09-07 | 北京工业大学 | High-curren density heterogeneous beam electron source |
-
1993
- 1993-03-27 CN CN 93236520 patent/CN2158575Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101075515B (en) * | 2007-06-28 | 2011-09-07 | 北京工业大学 | High-curren density heterogeneous beam electron source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |