WO1996032735B1 - HOLLOW BEAM ELECTRON TUBE HAVING TM0x0 RESONATORS, WHERE x IS GREATER THAN 1 - Google Patents
HOLLOW BEAM ELECTRON TUBE HAVING TM0x0 RESONATORS, WHERE x IS GREATER THAN 1Info
- Publication number
- WO1996032735B1 WO1996032735B1 PCT/IB1996/000443 IB9600443W WO9632735B1 WO 1996032735 B1 WO1996032735 B1 WO 1996032735B1 IB 9600443 W IB9600443 W IB 9600443W WO 9632735 B1 WO9632735 B1 WO 9632735B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- output
- axis
- resonant cavity
- tunnel
- input
- Prior art date
Links
Abstract
An inductive output tube (40 as depicted in figure 3), e.g., a 'KLYSTRODE' (Registered Trademark), or a klystron (10 depicted in figure 1) has a substantially hollow electron beam traversing a resonant cavity (e.g., 14 in figure 1; 42 in figure 3) excited to the TM0x0 mode, where x is greater than 1.
Claims
1. A resonant cavity means comprising- a substantially annular hollow electron beam tunnel, a resonant cavity structure having an interaction region coupled with the tunnel, the structure having an outer portion surrounding the tunnel and an inner portion surrounded by the tunnel, the resonant cavity structure being configured in a T 0x0 mode for an electron beam traversing the tunnel, characterized by x being an integer greater than 1.
2. A resonant cavity means comprising a substantially annular hollow electron beam tunnel, a resonant cavity structure having an interaction region coupled with the tunnel, the structure having an outer portion surrounding the tunnel and an inner portion surrounded by the tunnel, the resonant cavity structure being configured so there is a location therein located away from metal walls of the cavity where there are electric fields having approximately a zero magnitude, the electric fields being associated with oscillations of an electron beam traversing the tunnel, the tunnel and resonant cavity structure being arranged so an oscillating electron beam in the tunnel traverses a portion of the tunnel radially displaced from a central axis about which the cavity structure is symmetric, characterized by electric fields of electromagnetic waves 43
in the resonant cavity structure associated with the oscillations of the electron beam being (a) a maximum amplitude at the central axis and (b) at a peak amplitude at the tunnel.
3. An electron tube including the resonant cavity means of claim 1 or 2, the electron tube being adapted to handle a signal having a frequency in a predetermined frequency band, the tube comprising: means for deriving and collecting a substantially hollow linear electron beam traversing a predetermined beam tunnel, the resonant cavity means having an interaction region coupled with the beam tunnel for varying the beam in the beam tunnel as a function of the signal, the resonant cavity means being disposed between the deriving and collecting means.
4. An electron tube for handling an RF signal having a predetermined frequency range, the tube having a longitudinal axis and comprising an input coaxial feed responsive to the signal and concentric with the axis; a coaxial output feed concentric with the axis; said feeds extending in the direction of the axis and being centrally located relative to the axis; a cathode structure concentric with the axis for emitting an electron beam; an electron beam tunnel concentric with the axis and arranged relative to the cathode structure 44
so the emitted beam traverses the electron beam tunnel, resonant cavity means including an input resonant cavity structure and an output resonant cavity structure, the input resonant cavity structure: (a) including a first portion of the beam tunnel arranged so the beam propagates through the input resonant cavity structure via the first portion of the beam tunnel therein, (b) concentric with the axis and (c) coupled with the input coaxial feed via a region that extends radially from the axis so the input resonant cavity structure is excited by the input signal to modulate the beam; the output resonant cavity structure: (a) including a second portion of the beam tunnel arranged so the beam propagates through the output resonant cavity structure via the second portion of the beam tunnel therein, (b) concentric with the axis and (c) coupled with the output coaxial feed via a region that extends radially toward the axis so the output resonant cavity structure is excited by the modulated beam to drive the output coaxial feed, the input and output resonant cavity structures being excited in a TM0x0 mode for frequencies of the range, characterized by x being an integer greater than 1.
5. The electron tube of claim 3 or 4 wherein the resonant cavity means includes an input resonator and the means for deriving includes a cathode and a grid disposed in the input resonator, the grid being adapted to be coupled to a source of the signal for controlling the density of current in the beam in response to the signal.
6. The electron tube of claim 3 or 5 wherein the cavity means includes an input cavity configured so electromagnetic fields therein are in the TM0x0 mode for frequencies in the band.
7. The electron tube of claim 3 or 5 wherein the cavity means includes an output cavity configured so electromagnetic fields therein are in the TM0x0 mode for frequencies in the band.
8. The electron tube of any of claims 3-7 wherein the cavity means includes at least one intermediate cavity configured so electromagnetic fields therein are in the TM0x0 mode for frequencies in the band.
9. The electron tube of any of claims 3 or 5-8 wherein the linear electron beam extends longitudinally in the direction of a longitudinal axis of the beam tunnel and the cavity means includes an output cavity extending radially inward from the interaction region and the beam tunnel, the radial direction being at right angles to the longitudinal axis, the output cavity being configured so electromagnetic fields therein are in the TM0x0 mode for frequencies in the band, an output 46
structure coupled with the output cavity, the output structure extending longitudinally in the same direction as the beam tunnel longitudinal axis and being located in the hollow portion of the beam, the output structure being configured so electromagnetic fields therein are in a mode different from the mode of the electromagnetic field in the output cavity for frequencies in the band, the output structure including means for suppressing the mode of the electromagnetic field in the output cavity for frequencies in the band.
10. The electron tube of claim 9 wherein the output structure includes another cavity inside of the output cavity, a wall between the another cavity and the output cavity, the another cavity being arranged so the mode therein is TE011 for frequencies in the band, and means for coupling the TM0x0 electromagnetic field mode in the output cavity to the another cavity.
11. The electron tube of claim 10 wherein the coupling means includes slots in the wall, the slots being at an angle between but not including 0° and 90° relative to a plane extending radially from the longitudinal axis .
12. The electron tube of any of claims 8-11 further including an RF dielectric vacuum window in the output 47
cavity approximately where the electromagnetic field in the output cavity has a minimum electric field, the RF window being at a position between a region having about the same vacuum pressure as the beam tunnel and a zone having a different pressure about equal to the pressure where the output structure is located.
13. The cavity means or electron tube of any of claims 1 or 3-12 where x = 2, 3 or 4.
14. The resonant cavity means or electron tube of any of the preceding claims further including an RF vacuum window located away from metal walls of the cavity at a location where electric fields in the cavity have a magnitude close to zero.
15. An electron tube for handling an RF signal having a predetermined frequency range, the tube having a longitudinal axis and comprising an input coaxial feed responsive to the signal and concentric with the axis; a coaxial output feed concentric with the axis; said feeds extending in the direction of the axis and being centrally located relative to the axis; a cathode structure concentric with the axis for emitting an electron beam; an electron beam tunnel concentric with the axis and arranged relative to the cathode structure so the emitted beam traverses the electron beam tunnel, 48
eth input resonant cavity structure; (a) including a first portion of the beam tunnel arranged o the beam propagates through the input resonant cavity structure via the fi st portion of the beam tunnel therein, (b) oncentric with the axis and (c) coupled with the input coaxial feed via a region that extends radially from the axis so the input resonant cavity structure is excited by the input signal to modulate the beam; ah output resonant cavity structure, (a) including a second portion of the beam tunnel arranged so the beam propagates through the output resonant cavity structure via the second portion of the beam tunnel therein, (b) concentric with the axis and (c) coupled ith the output coaxial feed via a region that extends radially toward the axis so the output resonant cavity structure is excited by the modulated beam to drive the output coaxial feed, another' resonant cavity structure extending in the direction of the axis and being centrally located relative to the axis for coupling energy from the output resonant cavity structure to the output feed, the output and another resonant cavity structures being configured so they operate in different modes for frequencies in the range, and means for coupling energy from the output to the another resonant cavity structures.
16. An electron tube for handling an RF signal having a predetermined frequency range, the tube having 49
a longitudinal axis and comprising an input coaxial feed responsive to the signal and concentric with the axis; a coaxial output feed concentric with the axis; said feeds extending in the direction of the axis and being centrally located relative to the axis; a cathode structure concentric with the axis for emitting an electron beam; an electron beam tunnel concentric with the axis and arranged relative to the cathode structure so the emitted beam traverses the electron beam tunnel, an input resonant cavity structure: (a) including a first portion of the beam tunnel arranges so the beam propagates through the input resonant cavity structure via the first portion of the beam tunnel therein, (b) concentric with the axis and (c) coupled with the input coaxial feed via a region that extends radially from the axis so the input resonant cavity structure is excited by the input signal to modulate the beam; an output resonant cavity structure: (a) including a second portion of the beam tunnel arranged so the beam propagates through the output resonant cavity structure via the second portion of the beam tunnel therein, (b) concentric with the axis and (c) coupled with the output coaxial feed via a region that extends radially toward the axis so the output resonant cavity structure is excited by the modulated beam to drive the output coaxial feed, the coupling means including slots in a metal wall between the output and another resonant cavity structures, the metal wall being 50
concentric with and extending in the direction of the axis, the slots being in a tilted orientation relative to the axis so the slots are at an angle between but not including 0° and 90° relative to a plane at right angles to the tube longitudinal axis.
17. The electron tube of claim 15 or 16 wherein the output and another resonant cavities are respectively configured to operate in the TM0x0 and TE011 modes, where x is an integer greater than 1.
18. The resonant cavity means or electron tube of any of the preceding claims wherein the resonant cavity means has a central axis and the electromagnetic fields include an electric field for the TM0x0 mode, said T Ox0 mode electric field having a maximum value substantially at the central axis and a peak value at a location substantially displaced from the central axis, the resonant cavity means being arranged so the electron beam interacts therein with the peak value of the TM0x0 mode electric field that is substantially displaced from the central axis .
19. The resonant cavity means or electron tube of any of the preceding claims wherein the beam includes plural beamlets.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP96911088A EP0764339A4 (en) | 1995-03-28 | 1996-03-28 | HOLLOW BEAM ELECTRON TUBE HAVING TM 0x0? RESONATORS, WHERE x IS GREATER THAN 1 |
| JP8530850A JPH10501921A (en) | 1995-03-28 | 1996-03-28 | Hollow beam electron tube having a TMoxo resonator where x is greater than 1 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/413,034 US5698949A (en) | 1995-03-28 | 1995-03-28 | Hollow beam electron tube having TM0x0 resonators, where X is greater than 1 |
| US08/413,034 | 1995-03-28 |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| WO1996032735A2 WO1996032735A2 (en) | 1996-10-17 |
| WO1996032735A3 WO1996032735A3 (en) | 1997-01-09 |
| WO1996032735B1 true WO1996032735B1 (en) | 1997-03-13 |
| WO1996032735A9 WO1996032735A9 (en) | 1997-04-10 |
Family
ID=23635532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB1996/000443 WO1996032735A2 (en) | 1995-03-28 | 1996-03-28 | HOLLOW BEAM ELECTRON TUBE HAVING TM0x0 RESONATORS, WHERE x IS GREATER THAN 1 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5698949A (en) |
| EP (1) | EP0764339A4 (en) |
| JP (1) | JPH10501921A (en) |
| WO (1) | WO1996032735A2 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6084353A (en) * | 1997-06-03 | 2000-07-04 | Communications And Power Industries, Inc. | Coaxial inductive output tube having an annular output cavity |
| DE19735768A1 (en) | 1997-08-19 | 1999-02-25 | Amazonen Werke Dreyer H | Hollow tining and/or mowing machine |
| FR2803454B1 (en) * | 1999-12-30 | 2003-05-16 | Thomson Tubes Electroniques | MICROWAVE PULSE GENERATOR WITH INTEGRATED PULSE COMPRESSOR |
| FR2830371B1 (en) * | 2001-09-28 | 2005-08-26 | Thales Sa | MICROWAVE WAVE GENERATOR WITH VIRTUAL CATHODE |
| WO2005059946A1 (en) * | 2003-12-19 | 2005-06-30 | European Organization For Nuclear Research | Klystron amplifier |
| US7116064B1 (en) * | 2004-02-27 | 2006-10-03 | Advanced Energy Systems, Inc. | Axisymmetric emittance-compensated electron gun |
| WO2008070503A2 (en) * | 2006-11-29 | 2008-06-12 | L-3 Communications Corporation | Method and apparatus for rf input coupling for inductive output tubes and other emission gated devices |
| US8391937B1 (en) | 2008-03-05 | 2013-03-05 | The United States Of America As Represented By The Secretary Of The Navy | Radio frequency cavities lined with superconductor-coated tiles |
| US8258725B2 (en) * | 2008-04-03 | 2012-09-04 | Patrick Ferguson | Hollow beam electron gun for use in a klystron |
| WO2010065170A1 (en) * | 2008-08-20 | 2010-06-10 | Manhattan Technologies Ltd. | Multibeam doubly convergent electron gun |
| DE102009005200B4 (en) * | 2009-01-20 | 2016-02-25 | Siemens Aktiengesellschaft | Jet tube and particle accelerator with a jet pipe |
| US8975816B2 (en) * | 2009-05-05 | 2015-03-10 | Varian Medical Systems, Inc. | Multiple output cavities in sheet beam klystron |
| DE102009046463B4 (en) * | 2009-11-06 | 2014-06-05 | Helmholtz-Zentrum Dresden - Rossendorf E.V. | Coaxial slit-coupled resonator duplexer |
| JP5812969B2 (en) * | 2012-11-07 | 2015-11-17 | 三菱重工業株式会社 | Accelerating tube |
| US9791592B2 (en) * | 2014-11-12 | 2017-10-17 | Schlumberger Technology Corporation | Radiation generator with frustoconical electrode configuration |
| US9805904B2 (en) | 2014-11-12 | 2017-10-31 | Schlumberger Technology Corporation | Radiation generator with field shaping electrode |
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| US2407274A (en) * | 1941-04-16 | 1946-09-10 | Bell Telephone Labor Inc | Ultra high frequency electronic device |
| US2409224A (en) * | 1941-10-23 | 1946-10-15 | Bell Telephone Labor Inc | Oscillator |
| US2500944A (en) * | 1942-07-21 | 1950-03-21 | Sperry Corp | High-frequency tube structure |
| US2634383A (en) * | 1950-10-31 | 1953-04-07 | Gen Electric | Cavity resonator high-frequency electron discharge device |
| US3376524A (en) * | 1964-07-13 | 1968-04-02 | Sperry Rand Corp | Double-mode broadband resonant cavity |
| FR1422298A (en) * | 1964-11-12 | 1965-12-24 | Thomson Houston Comp Francaise | Improvements made to electron guns for hollow beam tubes |
| US3725751A (en) * | 1969-02-03 | 1973-04-03 | Sony Corp | Solid state target electrode for pickup tubes |
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| IT1202869B (en) * | 1979-01-24 | 1989-02-15 | Sits Soc It Telecom Siemens | KLYSTRON TWO CAVITY OSCILLATOR |
| US4286192A (en) * | 1979-10-12 | 1981-08-25 | Varian Associates, Inc. | Variable energy standing wave linear accelerator structure |
| DE3126119A1 (en) * | 1981-07-02 | 1983-01-20 | Philips Patentverwaltung Gmbh, 2000 Hamburg | MICROWAVE AMPLIFIER TUBES WITH TWO RING RESONATORS |
| US4480210A (en) * | 1982-05-12 | 1984-10-30 | Varian Associates, Inc. | Gridded electron power tube |
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| SU1333133A1 (en) * | 1985-04-04 | 1991-05-30 | Предприятие П/Я В-2058 | Klystron |
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| US5132638A (en) * | 1991-01-16 | 1992-07-21 | The United States Of America As Represented By The Secretary Of The Navy | High power klystron amplifier |
| US5315210A (en) * | 1992-05-12 | 1994-05-24 | Varian Associates, Inc. | Klystron resonant cavity operating in TM01X mode, where X is greater than zero |
-
1995
- 1995-03-28 US US08/413,034 patent/US5698949A/en not_active Expired - Fee Related
-
1996
- 1996-03-28 WO PCT/IB1996/000443 patent/WO1996032735A2/en not_active Application Discontinuation
- 1996-03-28 JP JP8530850A patent/JPH10501921A/en active Pending
- 1996-03-28 EP EP96911088A patent/EP0764339A4/en not_active Withdrawn
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