GB1061711A - - Google Patents

Info

Publication number
GB1061711A
GB1061711A GB31643/63A GB3164363A GB1061711A GB 1061711 A GB1061711 A GB 1061711A GB 31643/63 A GB31643/63 A GB 31643/63A GB 3164363 A GB3164363 A GB 3164363A GB 1061711 A GB1061711 A GB 1061711A
Authority
GB
United Kingdom
Prior art keywords
cathode
plate
anode
supported
anode wall
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
GB31643/63A
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.)
S-F-D LABORATORIES Inc
Original Assignee
S-F-D LABORATORIES 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
Priority claimed from US221796A external-priority patent/US3223876A/en
Application filed by S-F-D LABORATORIES Inc filed Critical S-F-D LABORATORIES Inc
Publication of GB1061711A publication Critical patent/GB1061711A/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
    • H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
    • H01J25/54—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having only one cavity or other resonator, e.g. neutrode tubes
    • H01J25/55—Coaxial cavity magnetrons
    • 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
    • H01J23/04—Cathodes
    • H01J23/05—Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
    • 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
    • H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy

Landscapes

  • Microwave Tubes (AREA)
  • Lasers (AREA)

Abstract

1,061,711. Magnetrons. S-F-D LABORATORIES Inc. Aug. 9, 1963 [Aug. 10, 1962 (2); Aug. 27, 1962; Sept. 6, 1962; Sept. 13, 1962], No. 31643/63. HeadingHlD. In an inverted magnetron with the cathode 9 surrounding an array of cavity resonators formed by anodes vanes 6 and with alternate resonators communicating through slots 7 with a central cavity resonator, waveguide or coaxial line supporting a circular electric mode, coupling to the output waveguide 2 is via an annular slot formed between the circular plate 13 and the surrounding anode wall in order to suppress more heavily loaded non- circular modes..The plate 13 may be replaced by a star- or snowflakeshaped plate, Fig. 6 (not shown), which is secured to the anode wall at its tips. Desirable coupling is enhanced by notches in the sides of the plate. The plate 13 is supported ,by a rod 14 which is axially slidable within a sleeve ,22 and sapphire ring bearings 23 so that the plate 13 serves also as a tuner. An annular slot mode absorber 24 consisting of a carbon-impregnated alumina ceramic is carried by the free end of the anode wall and, in order to eliminate unwanted radiation from the anode slots, annular conductive bands are provided to cover the ends of the slots, preferably on the vane side of the anode wall. These bands are secured to the anode wall through highly resistive electrical contacts. The anode wall is fixed to the tube envelope 1 only at the end remote from the slot mode absorber 24 so as to permit unrestrained axial movement at the free end. In another embodiment, Fig. 10 (not shown), the anode structure is carried from an insulator (52) by a shaft (55) supported by a transverse header (54). The cathode 9 is supported by spring fingers from three equally spaced stand-off insulators 72. The cathode heater (63), Fig. 14 (not shown), is in the form of a helix and supported within an enlarged cathode body portion (61) by a plurality of longitudinal insulator blocks (64) or insulated wires, Figs. 16, 17 (not shown). The cathode 9 is surrounded by a combined cathode end hat and heat shield assembly (67), Fig. 14 (not shown), composed of annular overlapping plates. Cathode end hats may be omitted and their function replaced by the magnetic polepieces 12.
GB31643/63A 1962-08-10 1963-08-09 Expired GB1061711A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR1372678T
US216228A US3289035A (en) 1962-08-10 1962-08-10 Reverse magnetron having means to suppress undersired modes
US219702A US3255377A (en) 1962-08-10 1962-08-27 Reverse magnetron with cathode support structure
US221796A US3223876A (en) 1962-09-06 1962-09-06 Cathode heater assembly for use in strong d.c. magnetic fields

Publications (1)

Publication Number Publication Date
GB1061711A true GB1061711A (en) 1967-03-15

Family

ID=27447047

Family Applications (3)

Application Number Title Priority Date Filing Date
GB25074/66A Expired GB1061715A (en) 1962-08-10 1963-08-09 Electron-emitting cathode assemblies
GB25073/66A Expired GB1061714A (en) 1962-08-10 1963-08-09 Magnetrons
GB31643/63A Expired GB1061711A (en) 1962-08-10 1963-08-09

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB25074/66A Expired GB1061715A (en) 1962-08-10 1963-08-09 Electron-emitting cathode assemblies
GB25073/66A Expired GB1061714A (en) 1962-08-10 1963-08-09 Magnetrons

Country Status (2)

Country Link
US (2) US3289035A (en)
GB (3) GB1061715A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3414761A (en) * 1965-09-16 1968-12-03 S F D Lab Dither tuner for a coaxial magnetron
US3458754A (en) * 1966-05-03 1969-07-29 Gen Electric Inverted cross field device having an arcuately segmented cathode
US3441792A (en) * 1966-07-08 1969-04-29 Sfd Lab Inc Reverse magnetron having a tie ring stiffening structure for its cathode support fingers
US3473072A (en) * 1967-03-01 1969-10-14 Nikolai Dmitrievich Ivano Mount for electric vacuum devices
US3805318A (en) * 1969-08-08 1974-04-23 R Marquette Brush cleaning device
US4620170A (en) * 1984-12-19 1986-10-28 Varian Associates, Inc. Means for liquid cooling a microwave window
US8446096B1 (en) 2009-10-02 2013-05-21 The United States Of America As Represented By The Secretary Of The Navy Terahertz (THz) reverse micromagnetron

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2335818A (en) * 1942-09-29 1943-11-30 Rca Corp Cathode assembly
US2482495A (en) * 1943-11-27 1949-09-20 Westinghouse Electric Corp Magnetron
NL141660B (en) * 1947-07-31 Ventron Corp PROCESS FOR PREPARING A SENSITIVE REDOX SYSTEM.
GB691139A (en) * 1951-01-08 1953-05-06 English Electric Valve Co Ltd Improvements in or relating to magnetron oscillators
GB727742A (en) * 1951-06-07 1955-04-06 Csf Improvements in or relating to resonant cavity magnetrons
CH309019A (en) * 1952-12-30 1955-08-15 Patelhold Patentverwertung Tuning device for single-circuit magnetron.
US2951182A (en) * 1957-11-25 1960-08-30 Bell Telephone Labor Inc Magnetron
US3062982A (en) * 1959-12-31 1962-11-06 Gen Electric Electrode assembly support

Also Published As

Publication number Publication date
GB1061714A (en) 1967-03-15
US3289035A (en) 1966-11-29
US3255377A (en) 1966-06-07
GB1061715A (en) 1967-03-15

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