GB1065945A - Improvements in or relating to magnetrons - Google Patents

Improvements in or relating to magnetrons

Info

Publication number
GB1065945A
GB1065945A GB10393/65A GB1039365A GB1065945A GB 1065945 A GB1065945 A GB 1065945A GB 10393/65 A GB10393/65 A GB 10393/65A GB 1039365 A GB1039365 A GB 1039365A GB 1065945 A GB1065945 A GB 1065945A
Authority
GB
United Kingdom
Prior art keywords
cathode
magnet
wave
wave circuit
tube
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
Application number
GB10393/65A
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.)
SFD LAB Inc
Original Assignee
SFD LAB Inc
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 SFD LAB Inc filed Critical SFD LAB Inc
Publication of GB1065945A publication Critical patent/GB1065945A/en
Expired legal-status Critical Current

Links

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
    • H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/42—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and with a magnet system producing an H-field crossing the E-field
    • H01J25/44—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and with a magnet system producing an H-field crossing the E-field the forward travelling wave being utilised
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/10—Magnet systems for directing or deflecting the discharge along a desired path, e.g. a spiral path

Landscapes

  • Microwave Tubes (AREA)

Abstract

1,065,945. Magnetrons; travelling-wave tubes. SFD LABORATORIES Inc. March 15, 1965 [March 13, 1964], No. 10893/65. Heading H1D. A magnetron or a crossed-field travelling- wave tube with a cylindrical cold cathode or cathode sole and a surrounding circular or part-circular anode wave circuit has a permanent magnet within the cathode or cathode sole and inside the envelops for generating the magnetic field. The cathode end hats form polepieces for the magnet. The invention is described as applied to a noise generator with a non-re-entrant interdigital wave circuit in which the fingers are bifurcated to introduce inductive loading. A built-in, short-circuited coaxial output line, extending parallel to the axis of the tube, is connected to the wave circuit by a radially extending finger between the inner conductor of the line and the end segment of the wave circuit. The cathode may operate with high field emission in which case H 2 , A or Xe gas is introduced at a pressure of 10<SP>-1</SP> mm. Hg., or the cathode may be secondary emissive. Heat is conducted from the magnet via the cathode structure support stem to an external heat sink, but the magnet is radially spaced from the inside wall of the cathode emitter to reduce thermal conduction from the cathode to the magnet. The invention may be applied to a forward or backward wave amplifier tube or to a strapped magnetron oscillator with a reentrant wave circuit.
GB10393/65A 1964-03-13 1965-03-15 Improvements in or relating to magnetrons Expired GB1065945A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US351749A US3346766A (en) 1964-03-13 1964-03-13 Microwave cold cathode magnetron with internal magnet

Publications (1)

Publication Number Publication Date
GB1065945A true GB1065945A (en) 1967-04-19

Family

ID=23382209

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10393/65A Expired GB1065945A (en) 1964-03-13 1965-03-15 Improvements in or relating to magnetrons

Country Status (3)

Country Link
US (1) US3346766A (en)
DE (1) DE1491446A1 (en)
GB (1) GB1065945A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3679993A (en) * 1967-09-27 1972-07-25 Varian Associates Crossed-field noise generator tube employing a high magnetic field intensity
US3562579A (en) * 1968-06-11 1971-02-09 Nippon Electric Co Electron discharge device employing inexpensive permanent magnets if significantly reduced size
FR1603150A (en) * 1968-07-16 1971-03-22
US3843904A (en) * 1973-08-01 1974-10-22 Us Navy Magnetic field geometry for crossed-field devices
US3855498A (en) * 1973-11-01 1974-12-17 Us Navy Center-pole magnetic circuit
US3881127A (en) * 1973-11-01 1975-04-29 Us Navy Bucking samarium cobalt magnets for crossed field devices
JPS5124170A (en) * 1974-08-03 1976-02-26 Matsushita Electric Ind Co Ltd MAGUNETORON
JPS5149670A (en) * 1974-10-25 1976-04-30 Sanyo Electric Co Magunetoron
US3984725A (en) * 1975-05-19 1976-10-05 Varian Associates Permanent magnet structure for crossed-field tubes
JPS5830692B2 (en) * 1975-07-30 1983-06-30 三洋電機株式会社 magnetron
US9000670B2 (en) * 2012-03-09 2015-04-07 L-3 Communications Corporation Harmonic mode magnetron
CN103151230B (en) * 2012-12-11 2015-05-13 中国人民解放军国防科学技术大学 Long-pulse high conversion efficiency negative pole used for magnetron

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2235517A (en) * 1937-11-25 1941-03-18 Fides Gmbh Magnetron
US2658149A (en) * 1946-03-04 1953-11-03 Charles J Gallagher Gas tube noise generator
FR1068448A (en) * 1952-12-19 1954-06-24 Csf Improvements to delay lines of the so-called interdigital type
US3096457A (en) * 1959-03-31 1963-07-02 Raytheon Co Traveling wave tube utilizing a secondary emissive cathode

Also Published As

Publication number Publication date
US3346766A (en) 1967-10-10
DE1491446A1 (en) 1969-06-12

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