EP0069426B1 - Tube amplificateur à micro-ondes avec deux résonateurs à tore - Google Patents
Tube amplificateur à micro-ondes avec deux résonateurs à tore Download PDFInfo
- Publication number
- EP0069426B1 EP0069426B1 EP82200811A EP82200811A EP0069426B1 EP 0069426 B1 EP0069426 B1 EP 0069426B1 EP 82200811 A EP82200811 A EP 82200811A EP 82200811 A EP82200811 A EP 82200811A EP 0069426 B1 EP0069426 B1 EP 0069426B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ring
- resonator
- amplifier tube
- electron beam
- ring resonator
- 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
Links
Images
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
- H01J25/10—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator
- H01J25/20—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator having special arrangements in the space between resonators, e.g. resistive-wall amplifier tube, space-charge amplifier tube, velocity-jump tube
-
- 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
- H01J25/10—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator
- H01J25/14—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator with tube-like electron stream coaxial with the axis of the resonators
Definitions
- the invention relates to a microwave amplifier tube with two ring resonators, the first of which serves as a control resonator and with the aid of a cathode system connected to this resonator generates an electron beam rotating around the ring axis with the frequency of a control signal, in which the electron beam is accelerated by a direct voltage and enters the second ring resonator tuned to the same frequency, into which it influences a high-frequency electromagnetic field and to which it releases part of its energy.
- a microwave amplifier tube of this type is known from DE-OS 2 947 264.
- a cathode surface mounted in a ring resonator serves as a source for a radially emerging, rotating, spoke-shaped electron beam.
- a prestressed grid at the exit gap of the resonator ensures that electrons only leave the control resonator at the respective location of the rotating maximum of the electric field strength. These electrons are then accelerated by a high electrostatic field and enter the exit ring resonator radially.
- a microwave amplifier tube is already known from US Pat. No. 2,634,383, with two ring resonators, the first of which serves as a control resonator and with the aid of a cathode system connected to this resonator, which generates an annular electron beam which is generated by a DC voltage accelerates into the second ring resonator, which can be tuned to the same frequency, in which it influences a high-frequency electromagnetic field and to which a part of its energy is emitted, the ring resonators being arranged one above the other in the direction of the ring axis and the electron beam the first ring resonator and the second ring resonator passes parallel to the ring axis.
- a circulating electron beam is not generated in this tube, it does not function like a "trirotron".
- the invention has for its object to design a microwave amplifier tube of the type mentioned in such a way that the adjustment of the angular velocities of the RF phase of both resonators no longer causes difficulties due to the geometry of the tube and its maximum operating frequency is significantly increased.
- the object is achieved according to the invention in that the ring resonators are arranged one above the other in the direction of the ring axis and in that the electron beam passes through the first ring resonator and the second ring resonator parallel to the ring axis.
- the advantages achieved by the invention are, in particular, that the alignment of the angular velocities of the RF phases of both resonators no longer presents any geometrically-related difficulties and that, since the cathode is no longer concentric in the control resonator, the upper frequency limit of the tube is raised significantly.
- Another advantage is that conventional methods can be used to apply an axis-parallel magnetic field to focus the electron beam, so that electron beams with a high space charge (i.e. low voltage) can be used.
- an efficiency in the amplification of RF signals (> 80%) can be achieved, which is significantly above the value that can be achieved with klystrons.
- the tube consists of two ring resonators 1 and 2 lying one above the other at a distance from one another.
- the ring resonators are connected to one another by insulating rings 9, so that an acceleration path 7 is formed between the ring resonators.
- the first ring resonator 1 is provided with an annular cathode 3 or 3a, which is arranged in an envelope 31 or 32 provided with an exit gap.
- This cathode arrangement 3, 31 or 3a, 32 can either - as the left half of the figure shows - be arranged outside the first ring resonator 1, which is then provided with an inlet gap 11, or - as the right half of the figure shows - inside the first ring resonator 1.
- the active cathode surface of the cathode arrangement can either form a closed ring or be composed of segments.
- the electron beam 4 emerges from the cathode arrangement parallel to the common axis of the ring resonators 1 and 2.
- the electrons emerge from the first ring resonator or input resonator 1 with a sufficiently large HF amplitude - to which the control signal is supplied, as is not shown here.
- the electron beam 9 then leaves the first ring resonator 1, the input resonator, to which - as is not shown further here - the control signal is fed, modulated by the exit gap 12.
- the electron beam 4 is accelerated and then enters the second ring resonator 2, the output resonator, through the entry gap 21.
- the output energy is decoupled from this resonator, as is also not shown in detail.
- the electron beam 4 leaves this second ring resonator 2 through the exit gap 22 and is received by a likewise ring-shaped collector 8. If the residual energy of the electron beam 4 is only so great that it can be dissipated thermally by the second ring resonator 2, the exit gap 22 and the collector 8 can be dispensed with. The electron beam 4 then hits the bottom of the second ring resonator 2.
- a magnetic field 6 can be generated that is parallel to the ring axis and focuses the electron beam 4. This enables an electron beam with a high space charge, i.e. low acceleration voltage, to be used with high beam current.
- a continuous wave output of a few MW can be achieved at a frequency of 500 MHz.
Landscapes
- Microwave Tubes (AREA)
- Microwave Amplifiers (AREA)
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19813126119 DE3126119A1 (de) | 1981-07-02 | 1981-07-02 | Mikrowellen-verstaerkerroehre mit zwei ringresonatoren |
DE3126119 | 1981-07-02 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0069426A2 EP0069426A2 (fr) | 1983-01-12 |
EP0069426A3 EP0069426A3 (en) | 1983-05-25 |
EP0069426B1 true EP0069426B1 (fr) | 1986-01-08 |
Family
ID=6135953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82200811A Expired EP0069426B1 (fr) | 1981-07-02 | 1982-06-30 | Tube amplificateur à micro-ondes avec deux résonateurs à tore |
Country Status (3)
Country | Link |
---|---|
US (1) | US4508992A (fr) |
EP (1) | EP0069426B1 (fr) |
DE (2) | DE3126119A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3204833C1 (de) * | 1982-02-11 | 1987-11-12 | Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe | Hochfrequenzverstaerker |
US5698949A (en) * | 1995-03-28 | 1997-12-16 | Communications & Power Industries, Inc. | Hollow beam electron tube having TM0x0 resonators, where X is greater than 1 |
US6847168B1 (en) | 2000-08-01 | 2005-01-25 | Calabazas Creek Research, Inc. | Electron gun for a multiple beam klystron using magnetic focusing with a magnetic field corrector |
US8994297B2 (en) * | 2009-10-21 | 2015-03-31 | Omega P Inc. | Low-voltage, Multi-Beam Klystron |
US8547006B1 (en) | 2010-02-12 | 2013-10-01 | Calabazas Creek Research, Inc. | Electron gun for a multiple beam klystron with magnetic compression of the electron beams |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL77392C (fr) * | 1949-09-09 | |||
US2634383A (en) * | 1950-10-31 | 1953-04-07 | Gen Electric | Cavity resonator high-frequency electron discharge device |
DE1060923B (de) * | 1957-06-06 | 1959-07-09 | Siemens Ag | Anordnung zur unmittelbaren Kopplung zwischen einem dichtemodulierten Elektronenstrahl und einem Aussenkreis einer Hoechstfrequenzroehre |
FR1422298A (fr) * | 1964-11-12 | 1965-12-24 | Thomson Houston Comp Francaise | Perfectionnements apportés aux canons électroniques pour tubes à faisceaux creux |
US3921027A (en) * | 1974-09-13 | 1975-11-18 | Joe Shelton | Microwave beam tube |
US4210845A (en) * | 1978-11-24 | 1980-07-01 | The United States Of America As Represented By The United States Department Of Energy | Trirotron: triode rotating beam radio frequency amplifier |
-
1981
- 1981-07-02 DE DE19813126119 patent/DE3126119A1/de not_active Withdrawn
-
1982
- 1982-06-30 DE DE8282200811T patent/DE3268389D1/de not_active Expired
- 1982-06-30 EP EP82200811A patent/EP0069426B1/fr not_active Expired
- 1982-07-02 US US06/394,594 patent/US4508992A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE3268389D1 (en) | 1986-02-20 |
EP0069426A3 (en) | 1983-05-25 |
EP0069426A2 (fr) | 1983-01-12 |
US4508992A (en) | 1985-04-02 |
DE3126119A1 (de) | 1983-01-20 |
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