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US2584323A - Multicellular velocity-modulated tube - Google Patents

Multicellular velocity-modulated tube Download PDF

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Publication number
US2584323A
US2584323A US92374A US9237449A US2584323A US 2584323 A US2584323 A US 2584323A US 92374 A US92374 A US 92374A US 9237449 A US9237449 A US 9237449A US 2584323 A US2584323 A US 2584323A
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United States
Prior art keywords
velocity
resonators
multicellular
cells
tube
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Expired - Lifetime
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US92374A
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English (en)
Inventor
Berterottiere Rene
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Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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Application filed by CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
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Expired - Lifetime legal-status Critical Current

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    • 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
    • H01J25/18—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 radial or disc-like electron stream perpendicular to the axis of the resonators

Definitions

  • the present invention relates to velocity-modulated tubes of the type of those described in J. Berniers co-pending United States application Ser. No. 664,156 filed on April 23, 1946, now Patent No. 2,539,985.
  • Such tubes are essentially formed by the association in parallel of a plurality of cells, each of which comprises an electron beam adapted to pass across a system of cavity resonators of prismatic shape with a rectangular or trapezoidal base, or of sectorial cylindrical shape bounded by two concentric surfaces.
  • Said resonators are provided over the whole or a part of their height with a re-entrant portion across which the-beam is adapted to pass, and the successive resonators are arranged either in a straight line or in a circle, the system providing in the latter case a radially symmetrical tube.
  • the object of the invention is to enable simple tuning over a wide band to be obtained in tubes of this type.
  • the improvement according to the invention comprises eliminating one of the operative cells in the row or in the belt of such cells, and mounting the deformin means in the portion of the enclosure that corresponds to the eliminated cell.
  • FIG. 1 shows by way of example a sectional plan view of a multi-cellular klystron to which the improvement according to the invention is applied.
  • the figure shows a sectional plan view of a radially symmetrical klystron comprising a plurality of cathodes ll, an inner belt of cavities l8, an outer .belt of cavities l9, and-Ea plurality of similar anodes 20 only one of which is illustrated.
  • the cross-sectional shape of the resonators shown herein corresponds to the shape of Fig. 8 J. Berm'ers aforesaid co-pending application, but it is to be understood that the shape specified in my co-pending application, for Multi-cellular Velocity Modulated Tubes Serial No. 92,373, filed May 10, 1949, could just "as well be used without afiecting the possibility of applying the improvements hereinafter described.
  • the resonators of each belt are coupled to one another by eliminating the common walls,
  • a portion 33 of the outer belt is eliminated and the corresponding cavity resonator 34 of the inner belt is replaced by a special cell in which the front surfaces of the re-entrant portion 35 are solid while the outer cylindrical wall 36 is replaced by a fiat'or slightly concave wall.
  • a resonator of the outer .belt is replaced by a cell 31 with a solid re-entrant portion and a fiat or slightly concave outer wall, while the corresponding inner resonator 38 is rendered inoperative by interposing the walls 39.
  • the wall of the outer .belt is also rendered readily deformable.
  • the elimination of a cell in each of the belts has the advantage of introducing a gap between the input and the output of the chain of oscillating circuits formed by the cells and of thereby preventing reaction which may be objectionable in the case in which it is desired to use the tube as an amplifier.
  • the decrease in inductance produced by the shape given to the wall is compensated by the increase in capacitance" that corresponds to the front surfaces of the re-entrant portion which are no longer hollow tofiallow the beam to pass. but solid.
  • the tuningzljfrequency of the special cell can therefore be lge'p't at the same value as that of the operative cells.
  • said means comprising for example a core 40 which is secured to the stationary portion of the cavity resonator and is provided at its pe riphery with a toothed portion ll driven by a 1.
  • a velocity -modulation tuhe having a phi-j rality of cells each comprising a cathode, an
  • the cells and the adjustment cavity resonators are circular, the first cavity resonators and the second adjustment cavity resonator being arranged along an inner circle and the second cavity resonators and the second adjustment cavity resonator being: arranged along an omen-concentric ,circle. 1

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  • Microwave Tubes (AREA)
US92374A 1948-05-20 1949-05-10 Multicellular velocity-modulated tube Expired - Lifetime US2584323A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR966750T 1948-05-20

Publications (1)

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US2584323A true US2584323A (en) 1952-02-05

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US92374A Expired - Lifetime US2584323A (en) 1948-05-20 1949-05-10 Multicellular velocity-modulated tube

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US (1) US2584323A (fr)
FR (1) FR966750A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2630545A (en) * 1950-08-14 1953-03-03 Rothstein Jerome Electron discharge device
US2892963A (en) * 1953-12-30 1959-06-30 Edward C Dench Traveling wave oscillator
US3107313A (en) * 1959-10-30 1963-10-15 Johann R Hechtel Velocity modulated electron tube with cathode means providing plural electron streams
DE1293912B (de) * 1959-07-28 1969-04-30 Varian Associates Elektronenstrahlroehre mit Geschwindigkeitsmodulation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2207846A (en) * 1938-06-30 1940-07-16 Rca Corp Electronic discharge device
US2320860A (en) * 1939-12-22 1943-06-01 Int Standard Electric Corp Electron discharge apparatus
US2466067A (en) * 1942-12-07 1949-04-05 Sperry Corp High-frequency apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2207846A (en) * 1938-06-30 1940-07-16 Rca Corp Electronic discharge device
US2320860A (en) * 1939-12-22 1943-06-01 Int Standard Electric Corp Electron discharge apparatus
US2466067A (en) * 1942-12-07 1949-04-05 Sperry Corp High-frequency apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2630545A (en) * 1950-08-14 1953-03-03 Rothstein Jerome Electron discharge device
US2892963A (en) * 1953-12-30 1959-06-30 Edward C Dench Traveling wave oscillator
DE1293912B (de) * 1959-07-28 1969-04-30 Varian Associates Elektronenstrahlroehre mit Geschwindigkeitsmodulation
US3107313A (en) * 1959-10-30 1963-10-15 Johann R Hechtel Velocity modulated electron tube with cathode means providing plural electron streams

Also Published As

Publication number Publication date
FR966750A (fr) 1950-10-17

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