CN1152789A - Linear electron-beam tube structure - Google Patents
Linear electron-beam tube structure Download PDFInfo
- Publication number
- CN1152789A CN1152789A CN 96110821 CN96110821A CN1152789A CN 1152789 A CN1152789 A CN 1152789A CN 96110821 CN96110821 CN 96110821 CN 96110821 A CN96110821 A CN 96110821A CN 1152789 A CN1152789 A CN 1152789A
- Authority
- CN
- China
- Prior art keywords
- choke
- frequency
- negative electrode
- electron
- proposition
- 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.)
- Pending
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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
- H01J23/14—Leading-in arrangements; Seals therefor
- H01J23/15—Means for preventing wave energy leakage structurally associated with tube leading-in arrangements, e.g. filters, chokes, attenuating devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
- H01J25/04—Tubes having one or more resonators, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly density modulation, e.g. Heaff tube
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2223/00—Details of transit-time tubes of the types covered by group H01J2225/00
- H01J2223/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
- H01J2223/54—Filtering devices preventing unwanted frequencies or modes to be coupled to, or out of, the interaction circuit; Prevention of high frequency leakage in the environment
Landscapes
- Microwave Tubes (AREA)
Abstract
An inductive output tube (IOT) includes an electron gun comprising a cathode 2, grid 3 and anode 4 surrounded by an annular resonant input cavity 7. RF chokes 5 and 6 prevent leakage of high frequency energy therethrough, the choke 6 nearer the grid/cathode region being shorter than the other to prevent or reduce high frequency parasitic oscillation.
Description
The present invention relates to linear electron-beam tube structure, more particularly, relate to inductive output tube (IOT ' S).
Inductive output tube is a kind of like this device, wherein, by input resonator high-frequency signal is added to the negative electrode of electron gun and the zone between the grid.This causes the modulation by the electron beam of this electron gun generation.Make the electron beam and the output cavity mutual effect of consequent density modulation.High frequency output signal after amplifying from the output of this output cavity.
The purpose of this invention is to provide a kind of improved linear electron-beam tube.
The invention provides a kind of linear electron-beam tube structure, it comprises: comprise negative electrode, the electron gun structure of grid and anode, and the high frequency input resonator that is provided with around described assembly, this resonant cavity has importation and the output that connects by means of radio-frequency choke, and, wherein said choke is to constitute like this, the high-frequency energy that makes near negative electrode/gate regions a choke avoid basically having first frequency leaks thus, leaks thus and leave the high-frequency energy that described negative electrode/gate regions another choke far away avoids having the second frequency that is lower than described first frequency basically.
The application of the invention, can reduce the vibration that causes by the feedback between anode/grid gap and the grid/negative electrode gap, in other words, can reduce described vibration by means of the choke of upper frequency, and the choke of lower frequency provides the performance of whole working band.Therefore, the combination of described two kinds of chokes provides the good performance of described electron-beam tube under operating frequency, simultaneously, parasitic oscillation is reduced to insignificant degree, otherwise the work of described electron tube is disturbed in this parasitic oscillation meeting.
In a specific embodiment of the present invention, arrange the choke of upper frequency to reduce, and can arrange the choke of described lower frequency to reduce to have for example leakage of 400MHz to 500MHz frequency via about the 800MHz of this choke and the leakage of higher frequency.
Preferably each choke is configured to two or more common metal parts of extending, the length of this choke is determined its operating frequency.In one embodiment, described each metal part can be eccentric each other, and, can extend being arranged essentially parallel on the y direction of beam direction, perhaps, use another kind of method, can on the direction of cross-section electron beam, extend.In the axle upwardly extending most preferred embodiment of a wherein said choke of the present invention at electron tube, this choke comprises ceramic material, and this ceramic material can constitute the part of the vacuum envelope of described electron tube.This provides a kind of small-sized structure, makes general structure have little diameter.
Use two chokes to realize the present invention satisfactorily, still, in other more complicated structures, can use plural choke.In addition, obviously preferably each metal part of described common extension is continuous basically, and still, in some structure, described metal part can comprise eyelet or fracture, and still, this may cause performance decrease, and, also can make structure more complicated.
Can also comprise the high-frequency energy absorbing material in described structure, this is useful, and what be used near the described choke of topped at least in part negative electrode/area of grid is those parts that expose originally, thereby reduces feedback.
The described metal part that comprises described choke can be a metallic plate, and this metallic plate can also play the support or the fixture of other parts of electron gun, perhaps, is used for installing and supporting described input resonator.Use another kind of method, the one or more parts in described each metal part can comprise the metal layer that is deposited on the shell.This metal layer only needs to have the thickness times over the skin depth under the operating frequency, and, can be in the manufacture process of described electron tube this metal layer of deposit accurately.
Describe below with reference to accompanying drawing, by embodiment and to be used to realize some method of the present invention, in the accompanying drawing:
Fig. 1 schematically illustrates the part of electron-beam tube structure of the present invention with the form of sectional arrangement drawing; And
Fig. 2 schematically illustrates the part of another kind of structure of the present invention.
With reference to figure 1, the part of inductive output tube shown in the figure, this part is divided into cylindrosymmetric basically two halves along longitudinal axis X-X.This part comprises ceramic cylinder 1, and the electron gun that is included in the negative electrode 2, grid 3 and the focusing anode 4 that separate on the longitudinal direction is housed in the ceramic cylinder, and this electron gun estimates to be created in the electron beam that longitudinal direction uses.Cylinder 1 is sealed to end plate, and electrical lead extends to each element of electron gun via this end plate, and the volume that is limited by cylinder 1 and described end plate is in vacuum state.
Huan Xing input resonator 7 places the outside of cylinder 1 coaxially substantially, and on the position, do such arrangement with respect to electron gun, when by means of coupling device high-frequency energy being added to this resonant cavity, cause in negative electrode-gate regions, producing modulated electric fields with box lunch.This causes the density modulation of the electron beam that is produced by electron gun.Resonant cavity 7 is included in the mechanical tuning device 8 of the resonance frequency that movably is used to regulate resonant cavity 7 on the longitudinal direction.
The wall 9 that limits resonant cavity 7 is annular wall, and it extends along the direction vertical with the longitudinal axis.Wall 9 constitutes whole with the metallic cylinder 10 of the outer surface that is fixed on cylinder 1.Strutting piece 11 keeps negative electrode 2 in position, the former comprise on the inner surface that is fixed on cylinder 1 and with cylinder 10 common cylindrical portions may 12 of extending on longitudinal direction.Cylinder 10, the insertion dielectric material of support section 12 and cylinder 1 limits first radio-frequency choke 5 for high-frequency energy together, and, in this structure, it is the operating frequency of IOT or the quarter-wave under near its frequency that the Design of length of this choke becomes, so that provide the performance of whole frequency band.
Another wall 13 further limits resonant cavity 7, and the former also is an annular slab, and it extends along the direction vertical with the longitudinal axis, and is positioned at the position than first wall 9 more close anodes 4.Wall 13 combines with the cylinder 14 of the outer surface that is fixed on cylinder 1.Grid 3 is installed in the described cylinder and is connected to metallic cylinder 15, the abutment of the latter and cylinder 1 and with cylinder 14 extension jointly on longitudinal direction.Dielectric material constitutes second radio-frequency choke 6 for the frequency that is higher than first choke 5 significantly together between metal part 14,15 and it.In one embodiment, choke 6 is 1/4 wavelength of about 800Mhz frequency substantially, and, under the situation of the performance that is provided with the described inductive output tube of remarkable infringement, reduced parasitic oscillation.Choke 6 partly applies the high-frequency energy absorbing material 19 of the silicone rubber that loads such as ferrite, and this high-frequency energy absorbing material 19 also extends to the end of ceramic cylinder 1.
Therefore, second radio-frequency choke 6 is coaxial with respect to negative electrode/grid structure basically, and, leave negative electrode/gate regions first radio-frequency choke 5 far away and be positioned at after the front of negative electrode 2 and and be provided with coaxially with respect to longitudinal axis X-X.
During work, the electron beam that electron gun produces is modulated by the high-frequency signal that is coupled in the input resonator at 18 places.After the modulation, electron beam passes output cavity, the output signal after amplifying from described output cavity output by means of double cavity structure usually.
Then, electron beam projects on the collector.A kind of suitable export structure of illustration among the British patent 2243943B.
Be shown in the structure of Fig. 2 at another kind, also use two chokes 16 and 17, but, they extend being substantially perpendicular on the direction of beam direction, near negative electrode/gate regions choke reduces or eliminates the upper frequency radiation to leak thus, the operating frequency of this choke is higher than the choke 17 towards the electron gun rear portion, and, be considerably shorter than choke 17.
Claims (11)
1. linear electron-beam tube structure, it comprises electron gun structure and high frequency input resonator, described electron gun structure is used to produce the electron beam along the electron beam channel of the longitudinal axis that is parallel to this structure, and comprise negative electrode, grid and anode, described high frequency input resonator is provided with around described assembly and comprises interior part and the outer part that connects by means of radio-frequency choke, it is characterized in that:
Described choke is to constitute like this, the high-frequency energy that makes near the negative electrode first choke avoid basically having first frequency leaks thus, and from negative electrode far away and be positioned at the negative electrode front after second choke high-frequency energy avoiding basically having the second frequency that is lower than first frequency leak thus.
2. as the structure of proposition in the claim 1, it is characterized in that: described first and second chokes comprise the electric conducting material section of common extension, and first choke is shorter than second choke.
3. the structure as proposing in the claim 1 is characterized in that: in the described choke one or both comprise metal part aspectant, that extend on y direction.
4. the structure as proposing in the claim 1 is characterized in that; In a kind of ceramic cylinder and the wherein said choke one or both are contained the part of described ceramic cylinder.
5. the structure as proposing in the claim 1 is characterized in that: in the described choke one or both comprise aspectant, in the side that is substantially perpendicular to the longitudinal axis upwardly extending metal part.
6. the structure as proposing in the claim 1 is characterized in that: at least one has aspectant, eccentric metal part each other in described first and second chokes.
7. as the structure of proposition in the claim 1, it is characterized in that: described first choke applies the high-frequency energy absorbing material at least in part.
8. as the structure of proposition in the claim 7, it is characterized in that: described first choke comprises ceramic material and the high-frequency energy absorbing material that is arranged on this ceramic material surfaces.
9. as the structure of proposition in the claim 1, it is characterized in that: described first frequency approximately is the twice of described second frequency.
10. inductive output tube according to above-mentioned each claim.
11. one kind as the cavity resonator structure according to the output cavity of the linear electron-beam tube of claim 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9514193A GB2303243A (en) | 1995-07-12 | 1995-07-12 | Linear electron beam tube arrangements |
| GB9514193.3 | 1995-07-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1152789A true CN1152789A (en) | 1997-06-25 |
Family
ID=10777508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96110821 Pending CN1152789A (en) | 1995-07-12 | 1996-07-12 | Linear electron-beam tube structure |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0753878A1 (en) |
| CN (1) | CN1152789A (en) |
| CA (1) | CA2181101A1 (en) |
| GB (1) | GB2303243A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814410A (en) * | 2010-04-20 | 2010-08-25 | 安徽华东光电技术研究所 | Orthopedic clamp for microwave tube grid and orthopedic method thereof |
| CN102636764A (en) * | 2011-02-10 | 2012-08-15 | 西门子公司 | Lead wire device, gradient coil unit with the same, and magnetic resonance equipment |
| CN110379690A (en) * | 2019-06-27 | 2019-10-25 | 电子科技大学 | Using the cold-cathode gun of RF excited field emission electron beam |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69832691D1 (en) * | 1997-02-17 | 2006-01-12 | Comm & Control Electronics Ltd | LOCAL COMMUNICATION SYSTEM |
| GB9806129D0 (en) * | 1998-03-24 | 1998-05-20 | Eev Ltd | Electron beam tubes |
| GB2346257A (en) * | 1999-01-26 | 2000-08-02 | Eev Ltd | Electron beam tubes |
| US7029296B1 (en) | 2000-02-07 | 2006-04-18 | Communication And Power Industires | Cover assembly for vacuum electron device |
| WO2001057903A2 (en) * | 2000-02-07 | 2001-08-09 | Communication & Power Industries | Input circuit for rf amplifier |
| KR101502305B1 (en) | 2007-07-20 | 2015-03-13 | 어플라이드 머티어리얼스, 인코포레이티드 | Rf choke for gas delivery to an rf driven electrode in a plasma processing apparatus |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950000718Y1 (en) * | 1989-05-30 | 1995-02-07 | 주식회사 금성사 | Magnetron choke |
| GB2278012B (en) * | 1993-05-11 | 1997-01-08 | Eev Ltd | Electron beam tubes |
| GB9313265D0 (en) * | 1993-06-28 | 1993-08-11 | Eev Ltd | Electron beam tubes |
| GB9322934D0 (en) * | 1993-11-08 | 1994-01-26 | Eev Ltd | Linear electron beam tube arrangements |
| DE69506073T2 (en) * | 1994-10-12 | 1999-04-15 | Eev Ltd | Electron tube |
-
1995
- 1995-07-12 GB GB9514193A patent/GB2303243A/en not_active Withdrawn
-
1996
- 1996-07-03 EP EP96304892A patent/EP0753878A1/en not_active Withdrawn
- 1996-07-12 CN CN 96110821 patent/CN1152789A/en active Pending
- 1996-07-12 CA CA 2181101 patent/CA2181101A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814410A (en) * | 2010-04-20 | 2010-08-25 | 安徽华东光电技术研究所 | Orthopedic clamp for microwave tube grid and orthopedic method thereof |
| CN101814410B (en) * | 2010-04-20 | 2013-05-15 | 安徽华东光电技术研究所 | Orthopedic clamp for microwave tube grid and orthopedic method thereof |
| CN102636764A (en) * | 2011-02-10 | 2012-08-15 | 西门子公司 | Lead wire device, gradient coil unit with the same, and magnetic resonance equipment |
| CN102636764B (en) * | 2011-02-10 | 2017-12-26 | 西门子公司 | Thread guide devices and gradient coil unit and magnetic resonance equipment with thread guide devices |
| CN110379690A (en) * | 2019-06-27 | 2019-10-25 | 电子科技大学 | Using the cold-cathode gun of RF excited field emission electron beam |
| CN110379690B (en) * | 2019-06-27 | 2020-09-25 | 电子科技大学 | Cold cathode electron gun using radio frequency excitation field to emit electron beam |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0753878A1 (en) | 1997-01-15 |
| GB2303243A (en) | 1997-02-12 |
| CA2181101A1 (en) | 1997-01-13 |
| GB9514193D0 (en) | 1995-09-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |