US2147454A - Electronic oscillator - Google Patents

Electronic oscillator Download PDF

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Publication number
US2147454A
US2147454A US117669A US11766936A US2147454A US 2147454 A US2147454 A US 2147454A US 117669 A US117669 A US 117669A US 11766936 A US11766936 A US 11766936A US 2147454 A US2147454 A US 2147454A
Authority
US
United States
Prior art keywords
electrode
electrodes
electrons
resonant circuit
target
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
US117669A
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English (en)
Inventor
George A Morton
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.)
RCA Corp
Original Assignee
RCA Corp
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
Priority to NL58199D priority Critical patent/NL58199C/xx
Application filed by RCA Corp filed Critical RCA Corp
Priority to US117669A priority patent/US2147454A/en
Priority to GB29531/37A priority patent/GB488817A/en
Priority to FR830309D priority patent/FR830309A/fr
Priority to CH205374D priority patent/CH205374A/de
Application granted granted Critical
Publication of US2147454A publication Critical patent/US2147454A/en
Anticipated expiration legal-status Critical
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
    • 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
    • H01J25/04—Tubes having one or more resonators, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly density modulation, e.g. Heaff tube

Definitions

  • My invention relatesto electronic oscillators, and more particularly to a high frequency oscillator in which the transient time of electrons is a function of the frequency of the oscillator.
  • the principal object of my invention is to provide means for establishing electronic oscillations in a resonant circuit.
  • Another object of my invention is to provide means for successively subtracting energy from a-mass of moving electrons as their velocity is gradually reduced by an energy absorbing circuit.
  • a still furtherobject of my invention is to provide means for successively changing the phase of the potentials applied to a plurality of electrodes, arranged along the path of the moving electrons in a thermionic tube, as a function of the moving electrons.
  • a thermionic tube I is arranged as follows: Within an evacuated envelope 3, a cathode 5, a grid I, an accelerating anode 9, a plurality of electrodes II, I3, I5, I1, I9 and a target 2
  • the cathode, grid, accelerating anode and target are electrodes of the conventional shape, which are likewise concentrically arranged along the common axis.
  • a suitable magnetic field may be supplied by an electromagnet 23, a permanent magnet, solenoid, or the like.
  • the other circuit terminal 33 is connected to electrodes I 3 and II, which are respectively positioned intermediate electrodes II, I5 and intermediate electrodes I5, I9.
  • a biasing battery 35 is connected between the cathode 5 and the accelerating anode 9.
  • the cente'rtap of the resonant circuit 25 is also connected to the battery 35.
  • a second battery, or a suitable'tap on the first mentioned battery 35, is used to bias the target 2
  • the unipotential cathode 5 is energized by a heater 31, which is connected to a battery 39 or the like.
  • a 5 resonant circuit 4 I comprising an inductor 43 and a variable capacitor 45, may be connected. be: tween the cathode 5 and the grid 1, and mutually coupled to -the resonant circuit 25.
  • if properly phased with respect to the first resonant'circuit 25, greatly increases the efiiciency of the oscillator.
  • Electrons emitted from the cathode! leave the cathode at yery high velocities under the influence of the accelerating anode 9.
  • a transitory current is established in the resonant circuit 25. It is assumed that the terminal 3
  • the electrons thus entering the field of the electrode II are opposed in their motion by the potential of the electrode I I, and thus energy is subtracted from the moving electrons and delivered to the resonant circuit.
  • the current in the resonant circuit again reverses its phasein timeto oppose the electrons leaving the field of electrode I3 and entering the field of electrode I5.
  • the electrons are moving at still slower velocities, and have delivered more energy to the resonant circuit. Their motion is again opposed and, by this opposition, more energy is subtracted from the moving electrons. This energy is also delivered to the oscillating circuit. This process may be continued along the path which the electrons are following, until substantially all of their energy is subtracted, at which time the electrons reach the target 2
  • the ma netic field which tends to focus the electrons, is not essential, as the electrons themselves are able to form a beam which traverses the common axis of the various electrodes.
  • the several electrodes H, B, etc. are each successively shorter and may be biased by the same or difierent voltages.
  • the transient time that is, the time required for the electrons to pass through the several electrodes, is determined by the length of the successive electrodes, the velocity at which the electrons enter the respective electrodes, and their respective potentials. It will be apparent that the resonant period of the resonant circuit 25 should equal the period required for the electrons to travel the distances between the successive electrodes.
  • An electronic oscillator including, in combination, an emissive electrode, an accelerating electrode, a target electrode and a plurality of electrodes arranged along a common axis between said accelerating electrode and said target, a resonant circuit having its terminals connected to alternate ones of said plurality of electrodes, and means for biasing said accelerating electrode, said target electrode, and said plurality of electrodes positively with respect to said emissive electrode, whereby energy may be successively subtracted by said resonant circuit as electrons pass from said emissive electrode to said target electrode.
  • An electronic oscillator including, in combination, a cathode, control grid, accelerating electrode, target electrode, and a plurality of electrodes arranged along a common axis between said accelerating electrode and said target, a resonant circuit having its terminals connected to alternate ones 01 said plurality of electrodes, means for biasing said accelerating electrode, said target electrode, and said plurality of electrodes positively with respect to mid cathode, and means connected to said control grid for controlling the phases of electrons approaching said plurality of electrodes.
  • An electronic oscillator including, in combination, a thermionic tube including an emissive electrode, a control electrode, a target electrode, and a plurality of electrodes arranged between said emissive electrode and target, a resonant circuit having its terminals connected to alternate ones of said plurality of electrodes, means for biasing said accelerating electrode, said target electrode, and said plurality of electrodes positively with respect to said emissive electrode, a second resonant circuit coupled to said first-mentioned resonant circuit and effectively connected'between said control electrode and said emission electrode whereby electrons emitted from said emissive'electrode may be phased with respect to the instantaneous potential of the first of said plurality of electrodes.
  • An electronic oscillator including, in combination, a thermionic tube including an -emissive electrode, a control electrode, a target electrode, and a plurality of electrodes of successively shorter lengths arranged between said emissive electrode and target, a resonant circuit having its terminals connected to alternate ones of said plurality of electrodes, means for biasing said accelerating electrode, said target electrode, and said plurality of electrodes positively with respect to said emissive electrode, a second resonant circuit coupled to said first-mentioned resonant circuit and eflfectively connected between said control electrode and said emissive electrode whereby electrons emitted from said emissive electrode may be-phased with respect to the instantaneous potential of the first of said plurality of electrodes whereby energy may be successively subtracted from electrons moving past said plurality of electrodes by said plurality of electrodes and said first-mentioned resonant circuit.

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US117669A 1936-12-24 1936-12-24 Electronic oscillator Expired - Lifetime US2147454A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL58199D NL58199C (en(2012)) 1936-12-24
US117669A US2147454A (en) 1936-12-24 1936-12-24 Electronic oscillator
GB29531/37A GB488817A (en) 1936-12-24 1937-10-28 Improvements in or relating to electron discharge device oscillators
FR830309D FR830309A (fr) 1936-12-24 1937-12-03 Perfectionnement aux oscillateurs électroniques
CH205374D CH205374A (de) 1936-12-24 1937-12-22 Vorrichtung zum Verstärken bezw. Erzeugen elektrischer Schwingungen sehr hoher Frequenz.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US117669A US2147454A (en) 1936-12-24 1936-12-24 Electronic oscillator

Publications (1)

Publication Number Publication Date
US2147454A true US2147454A (en) 1939-02-14

Family

ID=22374176

Family Applications (1)

Application Number Title Priority Date Filing Date
US117669A Expired - Lifetime US2147454A (en) 1936-12-24 1936-12-24 Electronic oscillator

Country Status (5)

Country Link
US (1) US2147454A (en(2012))
CH (1) CH205374A (en(2012))
FR (1) FR830309A (en(2012))
GB (1) GB488817A (en(2012))
NL (1) NL58199C (en(2012))

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424965A (en) * 1942-03-20 1947-08-05 Standard Telephones Cables Ltd High-frequency amplifier and oscillator
US2498886A (en) * 1937-07-14 1950-02-28 Gen Electric Ultra short wave device
US2653271A (en) * 1949-02-05 1953-09-22 Sperry Corp High-frequency apparatus
US2698381A (en) * 1948-10-18 1954-12-28 Robertson-Shersby-Ha Rob Bruce Wave guide accelerator system
US2822473A (en) * 1953-07-27 1958-02-04 William R Aiken Pulse duration lengthener
US3215890A (en) * 1961-05-22 1965-11-02 Zenith Radio Corp Electron gun structure for producing an electron beam free of radial velocity components wherein the length of the first non-magnetic cylinder is approximately equal to an integral number of wave lengths of the scallop frequency

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2498886A (en) * 1937-07-14 1950-02-28 Gen Electric Ultra short wave device
US2424965A (en) * 1942-03-20 1947-08-05 Standard Telephones Cables Ltd High-frequency amplifier and oscillator
US2698381A (en) * 1948-10-18 1954-12-28 Robertson-Shersby-Ha Rob Bruce Wave guide accelerator system
US2653271A (en) * 1949-02-05 1953-09-22 Sperry Corp High-frequency apparatus
US2822473A (en) * 1953-07-27 1958-02-04 William R Aiken Pulse duration lengthener
US3215890A (en) * 1961-05-22 1965-11-02 Zenith Radio Corp Electron gun structure for producing an electron beam free of radial velocity components wherein the length of the first non-magnetic cylinder is approximately equal to an integral number of wave lengths of the scallop frequency

Also Published As

Publication number Publication date
NL58199C (en(2012))
FR830309A (fr) 1938-07-27
GB488817A (en) 1938-07-14
CH205374A (de) 1939-06-15

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