CN1149194A - Inductive output tube arrangements - Google Patents
Inductive output tube arrangements Download PDFInfo
- Publication number
- CN1149194A CN1149194A CN 96110946 CN96110946A CN1149194A CN 1149194 A CN1149194 A CN 1149194A CN 96110946 CN96110946 CN 96110946 CN 96110946 A CN96110946 A CN 96110946A CN 1149194 A CN1149194 A CN 1149194A
- Authority
- CN
- China
- Prior art keywords
- passage
- electron gun
- wall
- electron beam
- channel
- 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
- 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
- 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
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
- H01J23/54—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
Abstract
An inductive output tube, such as an IOT has a generally cylindrical input cavity within which an annular channel 32 is defined by part of the cavity wall 30 and other walls 33 and 34 to give a U-shaped cross-section. The channel 32 is substantially wholly filled with high frequency energy absorbing material such as ferrite loaded silicone rubber 35. This prevents unwanted oscillations and because of the large surface area of the channel in contact with the material 35 it is particularly efficient. Other configurations and locations of the channel are also possible and the absorbing material may occupy only part of the channel providing that it is in contact with the surfaces of the channel walls.
Description
The present invention relates to inductive output tube arrangements, more particularly, relate to and be used for the input resonator that such electron tube injects high-frequency energy.
The present invention is particularly suitable for inductive output tube arrangements (hereinafter referred to as " IOT ").The IOT device comprises and disposes electron gun and resonance input cavity that is used to produce the linear electron bundle, and injecting in this chamber needs the radiofrequency signal of amplifying, so that at the grid of electron gun electron beam is modulated.Amplifying high frequency signal under the interaction of radio-frequency (RF) energy and electron beam is taken out amplifying signal by output cavity then.
Fig. 1 schematically illustrates a kind of known IOT device with vertical form of fracture.IOT comprises electron gun 1, has negative electrode 2, anode 3 and therebetween grid 4.Configuration electronics wheel 1 is that the longitudinal axis X-X along this device produces directed electron beam.TOT also comprises skew pipe 5 and 6, and before being collected by a collector electrode (not shown), electron beam is through this skew pipe 5 and 6.Center on electron gun 1 coaxial installation one cylinder annular input cavity 7 and comprise an input male part 8, apply rf (radio frequency) signal that needs amplification at male part 8.Output cavity 9 is around the slit between the skew pipe 5 and 6 and comprise that a coupling loop 10, rf signal, this coupling loop 10 of taking out through amplifying through coupling loop 10 insert a secondary output cavity 11, take out output signal by output cavity 11 through output male part 12.
TOI comprises the annular slab 13 and 14 of two landscape configuration, and they constitute the parts of relevant rf choke.First plate 13 is connected to tubular element 15 through electrically conductive elastic fingertip (not shown), and this tubular element 15 supports negative electrode 2 and maintains cathode potential.Another transverse plate 14 through elasticity fingertips be connected to grid 4 supporting member 16 on and be in grid potential.One comprises the exterior section and the interior section electrical isolation of transverse annular plate 17 and 18, and plate 17 is connected and extends jointly with plate 13 parts to wall extension 19 by cylindrical shaft with 18.External shell part also comprises 21 of the transverse plate 20 that connected by cylindrical wall 22, plate 20 and 21 and plate 14 parts that are electrically connected on the grid 4 extend jointly.The leakage of the high-frequency energy that is provided by chamber 7 has been provided by two rf chokes that formed by this cross structure.
Insulating material 27 is between the staggered transverse plate of rf choke, and structure support and electric insulation are provided.
Ceramic cylinder 28 and 29 is around electron gun structure and constitute a vacuum seal piece installing part.
In use, the voltage that is generally 30-40 kilovolt magnitude is formed between negative electrode 2 and the anode 3 and the rf input signal is added between negative electrode 2 and the grid 4.The rf choke that is formed by plate 14,20 and 21 is reduced in the coupling between negative electrode/gate regions and the anode 3.Yet in some cases, this may be not enough to prevent fully the leakage of rf energy and the undesirable vibration that the coupling between two districts causes producing electron beam.This vibration not only may reduce operating efficiency, but also may cause this pipe inner be enough to make its damage or invalid electric arc.
By sequence number is that our the previous application of announcing for GB-A-2279496 number discloses some method that can reduce vibration.The invention reside in more effectively and to reduce or eliminate basically and do not wish the vibration that produces.The present invention is particularly suitable for IOT, but also can be applied to the electron beam tube arrangements of other type easily.
According to the present invention, an inductive output tube arrangements is provided, it comprises: one has and is used to produce the negative electrode of electron beam and the electron gun structure of grid; Around the basic of this assembly arranged coaxial is the high-frequency resonant cavity of annular; Be used for providing the device of high-frequency energy with modulated electron beam to resonant cavity; And the wall in this chamber forms a passage therein, channel interior be equipped with can the absorbing high-frequency energy material.
By utilizing the present invention, owing to produce the material of loss in this pars intramuralis configuration, this material certainly will absorb energy (otherwise this energy may particularly produce coupling between negative electrode/grid level district and anode between the different piece of this pipe) like this, just can reduce or eliminate and not wish the vibration that produces.This passage provides the big surface area that contacts with absorbing material, and this structure is obviously fooled more effective when the conduit wall carry high frequency energy than material being contained in simply the surface.Therefore, the invention provides a kind of device of small compact, it is more effective to reach energy absorption than the device that does not utilize this passage.Because suitable absorbing material expense is expensive, adopt the present invention also may bring benefit on the expense, because of when with absorbing material only attached to wall on the time, can use less quantity to reach identical effect.A kind of suitable absorbing material used in this invention is the magnetic ferrites that is filled with insulating material, and preferably insulating material is a silicon rubber.A kind of appropriate materials that is filled with the insulation particulate is the Eccosorb CF-S-4180 that can be obtained by Emerson and Cuming company.This magnetic ferrites material that is filled with silicon rubber is a kind of high consumable material at UHF and microwave range, and can separate the high direct voltage of tens kilovolts of magnitudes.Also can adopt other material.
Silicon rubber as absorbing material can replace with the rubber or the resin of other type, and can add following material: a kind of or its composition in the graphite of iron powder, nickel by powder, carborundum, segmentation or the magnetic ferrites.Other material with similar characteristic also may be fit to, and the material of segmentation for example can exist with powder or coating of particles.
Passage can have a kind of in the shape of a lot of different cross sections.In a preferred embodiment, this passage is essentially annular and three sides is arranged in the cross section.Basically therefore the passage that takes the shape of the letter U provides the big surface area that contacts with absorbing material, and the electric current in the wall of chamber can be absorbed like this, to reduce undesirable vibration.It is inner that absorbing material can be full of this pipe.In an alternative embodiment, the surface of this passage contacts with absorbing material, but does not contain this material at the internal volume of channel interior.This volume space can by non-loss material for example silicon rubber to take maybe can be air space.
Having been found that only needs a passage just good performance can be arranged, but may need two or more passages in some electron-beam tube.
Have at passage under the situation of three sides, mutually towards each side can be extended along the direction of the longitudinal axis of electron beam orientation, perhaps extends along the radial direction that enters this chamber inwardly or leave this chamber outwardly.In a kind of allocation plan, the channel part leading thread is to orientation and axial orientation partly.
Passage can have other cross sectional shape, for example can have circular wall and maybe can have side more than three to form C shape section.
In an effective especially embodiment of the present invention, a wall of passage can also form the parts of rf choke device.This just provides a kind of device of compactness, and because the inner surface of passage contacts with absorbing material, the inclusion of the conduit wall in the choke device can not exert an influence to the effect of choke basically.
Best, passage is located substantially in the zone between the supporting member of the grid of electron gun structure and anode.In this district, reducing undesirable vibration or this is effective especially aspect the oscillation-damped basically.
Best, electron gun structure is positioned at vacuum seal piece installing inside, and this material is positioned at the packaging part outside.
According to a feature of the present invention, the resonator device that uses in conjunction with the induction output tube comprises the wall that forms passage, channel interior be equipped with can the absorbing high-frequency energy material.
Because the channel interior that material places this chamber wall to form is if desired, replace or, can place or take out this material easily in order to improve existing pipe.The main body of this pipe (being included in the part of working under the vacuum) if desired, can keep on the spot according to the assembling service requirement, perhaps can remove the chamber wall for maintenance.In maintenance process, the chamber wall of changing can be fitted on this pipe, so that when carrying out maintenance activity separately, operation is interrupted basically continuously and not.Therefore, but material can under maintenance state, keep in the location on the wall of chamber and bring tangible benefit aspect this pipe operation, can also improve its performance simultaneously.
Introduce some mode that the present invention can implement with reference to the accompanying drawings by way of example, wherein
Fig. 2-9 schematically shows out each parts of IOT of the present invention, comprises the shape and the material of various different passages.Same parts have used identical label.The other parts of this IOT as shown in Figure 1.
With reference to Fig. 2, IOT comprises an electron gun structure 1 with negative electrode 2, grid 4 and anode 3.TOT comprises an annular input resonator 7, and its configuration is modulated electron beam in order to receive high-frequency energy.Chamber 7 comprise one from choke device 31 to anode-supported 26 cylindrical parietal 30 that extend of axis X-X longitudinally, in use produce electron beam along this axis direction.A part and other wall 33 and 34 by chamber wall 30 form a circular passage 32.This channel cross-section shape takes the shape of the letter U basically, and extend and the wall that therein each surface coupled together is positioned at them near the end of choke 31 on each surface wherein facing each other longitudinally X-X.Passage 32 fills up with the magnetic ferrites that is filled with silicon rubber 35 basically.The wall 33 that wall facing each other 30 and 34 couples together is gone back as the part by plate 14 and the 20 rf chokes 31 that make up.Zone between each alternating share of choke 31 with insulating material for example silicon rubber be full of.Though in this device, passage is full of fully by absorbing material, in other device, passage can extend in the part passage between the openend of end wall 33 and passage.Yet this device is not effective like that.Passage 32 is in the zone between grid supporting member 16 and anode-supported 26.
With reference to Fig. 3, in another kind of device of the present invention, passage 36 is still formed by the part of the chamber wall 30 between choke 31 and anode-supported element 26, but in this case, two sides of other of U-shaped passage are to constitute to the wall 38 that choke 31 extends by the part 37 of support plate 26 with by plate 26.Passage 36 still is full of fully with absorbing material.
Consult Fig. 4, described device is to shown in Figure 2 similar, but in this embodiment, absorbing material 39 is not full of the passage 40 that is formed by wall 30,41,42 fully.The interior section of passage is an air space 43, and absorbing material 39 covers the inwall of passage 40.
In another embodiment similar to device shown in Figure 2 shown in Figure 5, passage 44 is orientated in an identical manner, but in this device, choke 31 separates with passage 44, does not have a shared common element.
Consult Fig. 6, another kind of device according to the present invention comprise rf choke 31 with anode-supported 26 cylindrical parietal that is connected.Passage 45 cross section that still takes the shape of the letter U, but in this case, wall 46 facing each other and the 47 longitudinal axis X-X with respect to device radially extend.Wall 48 is connected wall 46,47 and forms passage 45.In this embodiment, the contiguous rf choke 31 of this passage but do not constitute its part.Absorbing material is full of this passage.Passage 45 is stretched out by the center of this pipe, has therefore increased the volume that IOT takies.(not shown) in some other embodiment, radially the passage of Yan Shening extends internally.
With reference to Fig. 7, in another embodiment, this passage has more complicated structure, is constituted with the axially extended part 51 similar to device shown in Figure 2 by the part 50 of the horizontal expansion similar to Fig. 6.Like this, just provide and absorbing material 52 contacted big surface areas, this material is full of passage.
With reference to Fig. 8, passage 53 is to be formed by the part of cylindrical parietal 30, end plate 26 (parts 54 of supporting anode 3, choke 55) and the wall 56 that is extended towards rf choke 55 directions by supporting member 26.Therefore, in this device, passage has four sides basically, between the free end of parts 54 and wall 56 slit is arranged.Absorbing material 57 is enclosed in channel interior.
In the device shown in Fig. 2 to 8, shown in the rf choke be to constitute by the interlaced plate in the plane vertical with longitudinal axis X-X.Yet, in other embodiment, can substitute with axial rf choke, in other words, two cylinder modes in place are an inside that places another so that between them and with choke of the coaxial formation of axis X-X.
Consult Fig. 9, in another IOT of the present invention, electron gun 1 still by 7 of annular resonance input cavities around.In this embodiment, input cavity 7 comprises shell body part 58 and inner housing part 60, and inner housing partly maintains under the current potential different with last housing parts.Two rf chokes 61 and 62 are included between inner housing part 60 and the shell body part 58. Choke 61 and 62 each longitudinal axis X-X direction extension along the electron beam that produces in the use.One earthenware 63 centers on axis X-X arranged coaxial and constitutes the parts of choke 61 and 62.Choke 61 is included in the zone 64 and 65 of the outer and inner lip-deep metallisation copper of earthenware 63.Choke 62 is included in the metal level 66 that applies on the inner surface of earthenware 63 and the second plating layer 67 on its outer surface.Metal level 67 extends axially length and is longer than inner metal layer district 66.Has the part 69 that is connected on the annular slab 70 that constitutes resonant cavity 7 shell body parts 58 parts for anode-supported 68.
The inside part 70a of wall 69, plate 70 and outer plating layer 67 form a passage together, place magnetic ferrites or some other the suitable rf absorbing material that is filled with silicon rubber 71 in this channel interior.
In another embodiment of the present invention, with a kind of non-loss insulating material for example silicon rubber place on the part inner surface of earthenware 63 and sentence on the plating layer 66 that dotted line represents with 72.
To similar other device shown in Figure 9 in, can use the material that is different from pottery to form the parts of one or two choke.Insulating material needs not to be continuous between two chokes.In addition, plating layer as shown in Figure 9 can replace with each metalwork on the insulating material that is fixed on insertion.
Claims (17)
1. inductive output tube arrangements, comprise: one have negative electrode and grid be used to produce electron beam electron gun structure, around this assembly arranged coaxial basic for annular high-frequency resonant cavity and be used for injecting the device of high-frequency energy with modulated electron beam to resonant cavity, it is characterized in that, the wall in this chamber forms a passage, channel interior be equipped with can the absorbing high-frequency energy material.
2. device as claimed in claim 1 is characterized in that, this passage has three sides on the cross section.
3. device as claimed in claim 2 is characterized in that, extend along the direction of electron beam this passage two sides facing each other.
4. as claim 1,2 or 3 described devices, it is characterized in that the side facing each other of this passage is that the electron gun structure y direction radially extends with respect to the direction of electron beam.
5. device as claimed in claim 1 is characterized in that, this passage basically ringwise and coaxial with electron beam channel.
6. device as claimed in claim 1 is characterized in that, a wall of this passage also forms parts of radio-frequency choke device.
7. device as claimed in claim 6 is characterized in that, this radio-frequency choke device comprises the conducting element that extends along the direction vertical with the electron gun structure longitudinal axis.
8. device as claimed in claim 6 is characterized in that, this is penetrated the choke device frequently and comprises the conducting element that extends along the direction parallel with the electron gun structure longitudinal axis.
9. device as claimed in claim 8 is characterized in that, a kind of ceramic material places axially going up between the common conducting element that extends of radio-frequency choke device.
10. install as claimed in claim 8 or 9, it is characterized in that one of them conducting element comprises a plating layer.
11. device as claimed in claim 1 is characterized in that, this passage is located substantially in the zone between the grid supporting member of electron gun structure and anode-supported.
12. device as claimed in claim 1 is characterized in that, this passage is full of by the material of energy absorbing high-frequency energy basically.
13. device as claimed in claim 1 is characterized in that, the inner surface of this passage is not full of by this material fully.
14. device as claimed in claim 1 is characterized in that, this absorbing material is the magnetic ferrites that is filled with insulating material.
15. device as claimed in claim 14 is characterized in that, this absorbing material is the magnetic ferrites that is filled with silicon rubber.
16. device as claimed in claim 1 is characterized in that, this electron gun structure is located in the vacuum seal piece installing, and this material is positioned at the packaging part outside.
17. a resonator device is used in combination with the induction output tube, wherein the wall in this chamber forms a passage, is equipped with the material of energy absorbing high-frequency energy in channel interior.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9514005.9 | 1995-07-10 | ||
| GBGB9514005.9A GB9514005D0 (en) | 1995-07-10 | 1995-07-10 | Electron beam tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1149194A true CN1149194A (en) | 1997-05-07 |
Family
ID=10777385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96110946 Pending CN1149194A (en) | 1995-07-10 | 1996-07-10 | Inductive output tube arrangements |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0753879A2 (en) |
| CN (1) | CN1149194A (en) |
| CA (1) | CA2180491A1 (en) |
| GB (2) | GB9514005D0 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201080A (en) * | 2014-07-22 | 2014-12-10 | 中国科学院电子学研究所 | Double frequency induction output pipe |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5914067A (en) * | 1997-08-30 | 1999-06-22 | Daewoo Electronics Co., Ltd. | Microwave oven equipped with a structurally simple microwave generating apparatus |
| GB2346257A (en) * | 1999-01-26 | 2000-08-02 | Eev Ltd | Electron beam tubes |
| US20050230387A1 (en) * | 2004-04-14 | 2005-10-20 | Michael Regan | Insulated RF suppressor for industrial magnetrons |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3748513A (en) * | 1969-06-16 | 1973-07-24 | Varian Associates | High frequency beam tube having an r.f. shielded and insulated collector |
| US4163175A (en) * | 1977-01-21 | 1979-07-31 | Tokyo Shibaura Electric Co., Ltd. | Magnetron for which leakage of H.F. noise is minimized |
| DE3134034A1 (en) * | 1981-08-28 | 1983-03-10 | Gesellschaft für Schwerionenforschung mbH, 6100 Darmstadt | "ABSORBER" |
| US5130206A (en) * | 1991-07-29 | 1992-07-14 | Hughes Aircraft Company | Surface coated RF circuit element and method |
| GB2259708B (en) * | 1991-09-18 | 1995-05-10 | Eev Ltd | RF radiation absorbing material |
| US5572092A (en) * | 1993-06-01 | 1996-11-05 | Communications And Power Industries, Inc. | High frequency vacuum tube with closely spaced cathode and non-emissive grid |
| 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 |
| US5477107A (en) * | 1993-12-21 | 1995-12-19 | Hughes Aircraft Company | Linear-beam cavity circuits with non-resonant RF loss slabs |
-
1995
- 1995-07-10 GB GBGB9514005.9A patent/GB9514005D0/en active Pending
-
1996
- 1996-07-03 GB GB9613896A patent/GB2303244A/en not_active Withdrawn
- 1996-07-04 CA CA 2180491 patent/CA2180491A1/en not_active Abandoned
- 1996-07-04 EP EP96304941A patent/EP0753879A2/en not_active Withdrawn
- 1996-07-10 CN CN 96110946 patent/CN1149194A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201080A (en) * | 2014-07-22 | 2014-12-10 | 中国科学院电子学研究所 | Double frequency induction output pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0753879A3 (en) | 1997-01-29 |
| EP0753879A2 (en) | 1997-01-15 |
| GB9613896D0 (en) | 1996-09-04 |
| CA2180491A1 (en) | 1997-01-11 |
| GB9514005D0 (en) | 1995-09-06 |
| GB2303244A (en) | 1997-02-12 |
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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 |