US2779892A - Self-contained velocity modulator oscillator - Google Patents

Self-contained velocity modulator oscillator Download PDF

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Publication number
US2779892A
US2779892A US232747A US23274751A US2779892A US 2779892 A US2779892 A US 2779892A US 232747 A US232747 A US 232747A US 23274751 A US23274751 A US 23274751A US 2779892 A US2779892 A US 2779892A
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US
United States
Prior art keywords
self
velocity modulator
lecher
contained
modulator oscillator
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 - Lifetime
Application number
US232747A
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English (en)
Inventor
Coeterier Frederik
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.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust Co
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 Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/02—Lecher resonators
    • 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
    • H01J25/32—Tubes with plural reflection, e.g. Coeterier tube

Definitions

  • This invention relates to electron discharge tubes including an oscillatory system comprising one or more Lecher systems and excited by one or more electron beams.
  • the object of the invention is to minimize this disadvantage.
  • the Lecher systems are interrupted at or in the vicinity of a voltage anti-node, the two parts of the Lecher systems being secured, adjacent their ends, in a body of insulating material not heated directly by the discharge and preferably constituted by the wall of the tube. Since the coeflicient of expansion of an insulator is, as a rule, smaller than that of the metals from which the Lecher systems are manufactured and, furthermore, since its temperature difierences in the various operating positions are also smaller, the length of the Lecher systems varies to a smaller extent than if the interruption were not provided. Since the interruption lies at or in the vicinity of a voltage antinode, variation in the size of the interruption with thermal expansion substantially does not afiect frequency. The interruption preferably lies no more than one tenth of wavelength remote from a voltage anti-node.
  • Fig. 1 ' is a vertical sectional view
  • Fig. 2 is a horizontal sectional view of an electron discharge tube according to the invention.
  • 1 indicates the glass wall of the discharge tube in which a circular disc 2 is sealed at right angles to the axis of the cylindrical tube.
  • a rectangular body 3 Secured to the disc 2 is a rectangular body 3 which forms a cavity resonator the bottom of which is constituted by a plate ICE 4.
  • the body and the strips are interrupted over a small distance at 6 and 7 respectively.
  • the lower part of the body 3 is: supported by two lead-through pins 8.
  • the tube furthermore contains a cathode 9, a screen electrode 10, a collecting electrode 12, and in front thereof, a perforated brake-field electrode 11.
  • the electrons emitted by cathode 9 are formed into an electron beam by the field existing between cathode 9 and the screen electrode 10.
  • the body 3 In operation as a klystron field oscillator tube, the body 3 has applied to it a voltage of several thousand volts with respect to the cathode, Whereas the electrode 11 acquires about cathode potential and collecting electrode 12 acquires a potential negative with respect to the cathode.
  • a velocity-modulated electron discharge tube comprising an insulating envelope, means disposed in said envelope for producing at least one electron beam, and an oscillatory system disposed in said envelope and adapted to be excited into oscillation by said electron beam, said oscillatory system comprising a rectangular metal body and a metal Lecher wire system sealed into a portion of the envelope remote from the electron beam and defining the frequency of the excited oscillations to produce voltage Wave patterns within said oscillatory system, said rectangular body and said Lecher system each comprising two separate portions separated by an air gap located in the vicinity of a voltage anti-node point of the wave patterns of the oscillations.
  • a velocity-modulated electron discharge tube as claimed in claim 1 in which the gap is spaced by a distance of less than a tenth of a wavelength from the voltage anti-node point.

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  • Lasers (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Microwave Tubes (AREA)
US232747A 1950-07-06 1951-06-21 Self-contained velocity modulator oscillator Expired - Lifetime US2779892A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL299856X 1950-07-06

Publications (1)

Publication Number Publication Date
US2779892A true US2779892A (en) 1957-01-29

Family

ID=19783204

Family Applications (1)

Application Number Title Priority Date Filing Date
US232747A Expired - Lifetime US2779892A (en) 1950-07-06 1951-06-21 Self-contained velocity modulator oscillator

Country Status (7)

Country Link
US (1) US2779892A (d)
BE (1) BE504456A (d)
CH (1) CH299856A (d)
DE (1) DE868945C (d)
FR (1) FR1039367A (d)
GB (1) GB701308A (d)
NL (2) NL83981C (d)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2128235A (en) * 1934-10-11 1938-08-30 Meaf Mach En Apparaten Fab Nv Vacuum discharge tube
US2128232A (en) * 1934-02-23 1938-08-30 Meaf Mach En Apparaten Fab Nv Electron tube
US2190511A (en) * 1938-03-01 1940-02-13 Gen Electric Ultra short wave system
US2383343A (en) * 1940-08-13 1945-08-21 Westinghouse Electric Corp Two-cylinder short-wave resonator apparatus
US2402601A (en) * 1942-02-16 1946-06-25 Standard Telephones Cables Ltd Electron discharge device
CH250276A (de) * 1940-12-02 1947-08-15 Philips Nv Vorrichtung für Ultrahochfrequenzschwingungen mit einer Entladungsröhre, in der ein durch Laufzeiteffekt dichtemodulierter Elektronenstrahl erzeugt wird.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2128232A (en) * 1934-02-23 1938-08-30 Meaf Mach En Apparaten Fab Nv Electron tube
US2128235A (en) * 1934-10-11 1938-08-30 Meaf Mach En Apparaten Fab Nv Vacuum discharge tube
US2190511A (en) * 1938-03-01 1940-02-13 Gen Electric Ultra short wave system
US2383343A (en) * 1940-08-13 1945-08-21 Westinghouse Electric Corp Two-cylinder short-wave resonator apparatus
CH250276A (de) * 1940-12-02 1947-08-15 Philips Nv Vorrichtung für Ultrahochfrequenzschwingungen mit einer Entladungsröhre, in der ein durch Laufzeiteffekt dichtemodulierter Elektronenstrahl erzeugt wird.
US2402601A (en) * 1942-02-16 1946-06-25 Standard Telephones Cables Ltd Electron discharge device

Also Published As

Publication number Publication date
CH299856A (de) 1954-06-30
DE868945C (de) 1953-03-02
FR1039367A (fr) 1953-10-06
GB701308A (en) 1953-12-23
BE504456A (d)
NL83981C (d)
NL154667B (nl)

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