EP0082769A1 - Frequenzvervielfacher - Google Patents

Frequenzvervielfacher Download PDF

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Publication number
EP0082769A1
EP0082769A1 EP82402296A EP82402296A EP0082769A1 EP 0082769 A1 EP0082769 A1 EP 0082769A1 EP 82402296 A EP82402296 A EP 82402296A EP 82402296 A EP82402296 A EP 82402296A EP 0082769 A1 EP0082769 A1 EP 0082769A1
Authority
EP
European Patent Office
Prior art keywords
frequency
cavity
frequency multiplier
axis
magnetic field
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.)
Withdrawn
Application number
EP82402296A
Other languages
English (en)
French (fr)
Inventor
Bernard Epsztein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales SA
Original Assignee
Thomson CSF SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0082769A1 publication Critical patent/EP0082769A1/de
Withdrawn legal-status Critical Current

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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
    • H01J25/025—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 with an electron stream following a helical path

Definitions

  • the invention relates to a frequency multiplier for the production of millimeter and sub-millimeter radio waves, operating by interaction of an electron beam and an electromagnetic wave.
  • This type of tube is used for the production of high powers in the range of millimeter and sub-millimeter waves mentioned.
  • the subject of the invention is a frequency multiplication arrangement making it possible to avoid these difficulties.
  • the seat circuit of the electromagnetic wave in interaction with the beam is provided in two parts, the first of which resonates on a frequency close to the cyclotronic frequency f, and the second on a frequency multiple whole of this frequency, in the conditions which will be described.
  • This figure shows in schematic section a frequency multiplier of the invention.
  • an electron beam 6 passes through a first cavity 1, resonating with a pulsation ⁇ ) J close to ⁇ c .
  • This cavity extends over such a length and has an impedance whose value is such that an oscillation at this frequency occurs there.
  • This oscillation is in low amplitude operating conditions, so that in this section of the multiplier tube only a small fraction of the beam energy is expended in the interaction of the latter with the electromagnetic field of the cavity. Given the high overvoltages that we know to achieve for such cavities, it is perfectly possible nevertheless to obtain at the output 8 of the cavity 1 a beam having a large modulation depth, in the sense that it is understood in the interaction tubes in general, and speed modulation in particular.
  • a part bearing the mark 5, located in front of the cavity 1 comprises, according to the art known in the art, one or more traps intended to avoid any influence of the high frequency wave on the gun whose optics is particularly delicate in this kind of tube.
  • This part can also include, always according to the art, attenuating zones for the high frequency wave, for the same purpose. It consists of a slip space, equipotential for the accelerated beam; it is practically at the same continuous potential as anode 4.
  • the beam then enters the cavity 2 resonating at a frequency multiple whole of the self-oscillation frequency corresponding to the previous pulsation W.
  • the beam gives up a significant fraction of its energy in the form of electromagetic energy at the harmonic frequency nf (n integer); this energy is evacuated by the output guide 7, while the electrons are captured by a collector not shown in the drawing.
  • the distance between the ends 8 and 9 of the two cavities can be increased compared to that of the example, so as to constitute an equipotential tunnel 10 for sliding, as in a klystron, allowing an improvement in the grouping of the electrons within the beam.
  • the tunnel is advantageously at the potential of the anode, as are the cavities 1 and 2.
  • the cavity l instead of being self-oscillating, can be modified (length and reduced overvoltage) so as to no longer self-oscillate; in this case it is excited by an external microwave source, not shown, operating in the vicinity of the cyclotonic frequency.
  • This requires the addition to the cavity 1 of a source coupling member (loop in the case of a coaxial, iris in that of a guide, etc.).
  • the frequency multiplier of the present intention preferably operates in TE mode, preferably in TE mode o, n, l
  • n 2 ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ respectively the pulsation and the wavelength considered corresponding to the frequency f for the first cavity and nf for the second.
  • the opening in the center of the first cavity can, without drawback, as in the drawing, have the same dimension as in the second cavity, or a dimension substantially greater; finally, in the example, the sliding tube, chosen very short, was a small fraction of the previous smallest radius r ..
  • the multiplier tube of the invention allows the generation of high-end microwave energy, with high levels. It has the same applications as the prior art generators in millimeter and sub-millimeter waves, namely, in particular, measurement in plasmas, radar transmission and telecommunications.

Landscapes

  • Particle Accelerators (AREA)
  • Microwave Tubes (AREA)
EP82402296A 1981-12-23 1982-12-14 Frequenzvervielfacher Withdrawn EP0082769A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8124167A FR2518803A1 (fr) 1981-12-23 1981-12-23 Multiplicateur de frequence
FR8124167 1981-12-23

Publications (1)

Publication Number Publication Date
EP0082769A1 true EP0082769A1 (de) 1983-06-29

Family

ID=9265365

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82402296A Withdrawn EP0082769A1 (de) 1981-12-23 1982-12-14 Frequenzvervielfacher

Country Status (3)

Country Link
EP (1) EP0082769A1 (de)
JP (1) JPS58116807A (de)
FR (1) FR2518803A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141525A2 (de) * 1983-09-30 1985-05-15 Kabushiki Kaisha Toshiba Gyrotron
US4554484A (en) * 1983-08-29 1985-11-19 The United States Of America As Represented By The Secretary Of The Navy Complex cavity gyrotron
US5038077A (en) * 1989-01-31 1991-08-06 The United States Of American As Represented By The Secretary Of The Navy Gyroklystron device having multi-slot bunching cavities
US5281894A (en) * 1990-09-28 1994-01-25 The United States Of America As Represented By The Secretary Of The Navy Dual cavity for a dual frequency gyrotron
WO1999028943A1 (en) * 1997-11-27 1999-06-10 Eev Limited Electron beam tubes
KR101122098B1 (ko) * 2003-06-24 2012-03-15 알베마를 코포레이션 가금 가공처리시의 살균 제어

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492996A (en) * 1945-08-25 1950-01-03 Sperry Corp Tunable high-frequency cavity resonator
US3155868A (en) * 1959-10-14 1964-11-03 Nippon Electric Co Plural resonator cavities tuned to integrally related frequencies
US3363138A (en) * 1964-11-04 1968-01-09 Sperry Rand Corp Electron beam-plasma device operating at multiple harmonics of beam cyclotron frequency
US3373309A (en) * 1962-10-03 1968-03-12 Siemens Ag Electron beam tube for frequency multiplication
US3389347A (en) * 1966-09-08 1968-06-18 Army Usa Microwave noise generator
US3457450A (en) * 1966-08-31 1969-07-22 Varian Associates High frequency electron discharge device
US3474283A (en) * 1967-03-22 1969-10-21 Us Navy Cyclotron wave upconverter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492996A (en) * 1945-08-25 1950-01-03 Sperry Corp Tunable high-frequency cavity resonator
US3155868A (en) * 1959-10-14 1964-11-03 Nippon Electric Co Plural resonator cavities tuned to integrally related frequencies
US3373309A (en) * 1962-10-03 1968-03-12 Siemens Ag Electron beam tube for frequency multiplication
US3363138A (en) * 1964-11-04 1968-01-09 Sperry Rand Corp Electron beam-plasma device operating at multiple harmonics of beam cyclotron frequency
US3457450A (en) * 1966-08-31 1969-07-22 Varian Associates High frequency electron discharge device
US3389347A (en) * 1966-09-08 1968-06-18 Army Usa Microwave noise generator
US3474283A (en) * 1967-03-22 1969-10-21 Us Navy Cyclotron wave upconverter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. MTT-25, no. 6, juin 1977, pages 514-521, New York (USA); *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4554484A (en) * 1983-08-29 1985-11-19 The United States Of America As Represented By The Secretary Of The Navy Complex cavity gyrotron
EP0141525A2 (de) * 1983-09-30 1985-05-15 Kabushiki Kaisha Toshiba Gyrotron
EP0141525A3 (en) * 1983-09-30 1987-10-28 Kabushiki Kaisha Toshiba Gyrotron device
US5038077A (en) * 1989-01-31 1991-08-06 The United States Of American As Represented By The Secretary Of The Navy Gyroklystron device having multi-slot bunching cavities
US5281894A (en) * 1990-09-28 1994-01-25 The United States Of America As Represented By The Secretary Of The Navy Dual cavity for a dual frequency gyrotron
WO1999028943A1 (en) * 1997-11-27 1999-06-10 Eev Limited Electron beam tubes
US6465958B1 (en) 1997-11-27 2002-10-15 Eev Limited Electron beam tubes
KR101122098B1 (ko) * 2003-06-24 2012-03-15 알베마를 코포레이션 가금 가공처리시의 살균 제어

Also Published As

Publication number Publication date
FR2518803B1 (de) 1984-10-26
JPS58116807A (ja) 1983-07-12
FR2518803A1 (fr) 1983-06-24

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Effective date: 19840302

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Inventor name: EPSZTEIN, BERNARD