GB2386749B - Magnetron - Google Patents

Magnetron

Info

Publication number
GB2386749B
GB2386749B GB0206242A GB0206242A GB2386749B GB 2386749 B GB2386749 B GB 2386749B GB 0206242 A GB0206242 A GB 0206242A GB 0206242 A GB0206242 A GB 0206242A GB 2386749 B GB2386749 B GB 2386749B
Authority
GB
United Kingdom
Prior art keywords
vane
resonator
magnetron
dielectric
ceramic
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 - Fee Related
Application number
GB0206242A
Other versions
GB2386749A (en
GB0206242D0 (en
Inventor
Michael Barry Clive Brady
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.)
Teledyne UK Ltd
e2v Technologies Ltd
Original Assignee
Marconi Applied Technologies Ltd
e2v Technologies Ltd
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 Marconi Applied Technologies Ltd, e2v Technologies Ltd filed Critical Marconi Applied Technologies Ltd
Priority to GB0206242A priority Critical patent/GB2386749B/en
Publication of GB0206242D0 publication Critical patent/GB0206242D0/en
Priority to KR10-2004-7014541A priority patent/KR20040102044A/en
Priority to DE60328975T priority patent/DE60328975D1/en
Priority to CNB038061708A priority patent/CN100342478C/en
Priority to JP2003577294A priority patent/JP4301958B2/en
Priority to EP03708352A priority patent/EP1485933B1/en
Priority to AU2003212532A priority patent/AU2003212532A1/en
Priority to PCT/GB2003/001108 priority patent/WO2003079394A1/en
Priority to AT03708352T priority patent/ATE441201T1/en
Publication of GB2386749A publication Critical patent/GB2386749A/en
Priority to US10/941,072 priority patent/US7199525B2/en
Application granted granted Critical
Publication of GB2386749B publication Critical patent/GB2386749B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H01J23/54—Filtering devices preventing unwanted frequencies or modes to be coupled to, or out of, the interaction circuit; Prevention of high frequency leakage in the environment
    • 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

Landscapes

  • Microwave Tubes (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Magnetic Heads (AREA)

Abstract

A magnetron comprises a cathode 5, an anode 2 having at least one vane 3, which defines a plurality of cavities. A dielectric resonator 7 is located between the vane(s) 3 and magnetic pole-piece 6a, such that it is in communication with said vane(s). The di-electric resonator 7 comprises a portion 8 of dielectric material, preferably a ceramic such as alumina, and a portion 9 of lossy material such as a carbon-loaded ceramic. A further conductive portion (15, figure 3) may be interposed between the two sections 8 and 9 of the resonator 7. In use the dielectric resonator 7 at least partially absorbs spurious radiation generated in a predetermined mode of operation of the magnetron, preferably the pi-1 mode, which if transmitted may interfere with other electronic devices.
GB0206242A 2001-02-13 2002-03-16 Magnetron Expired - Fee Related GB2386749B (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
GB0206242A GB2386749B (en) 2002-03-16 2002-03-16 Magnetron
AT03708352T ATE441201T1 (en) 2002-03-16 2003-03-17 MAGNETRON
KR10-2004-7014541A KR20040102044A (en) 2002-03-16 2003-03-17 Magnetron
CNB038061708A CN100342478C (en) 2002-03-16 2003-03-17 Magnetron
JP2003577294A JP4301958B2 (en) 2002-03-16 2003-03-17 Magnetron
EP03708352A EP1485933B1 (en) 2002-03-16 2003-03-17 Magnetron
AU2003212532A AU2003212532A1 (en) 2002-03-16 2003-03-17 Magnetron
PCT/GB2003/001108 WO2003079394A1 (en) 2002-03-16 2003-03-17 Magnetron
DE60328975T DE60328975D1 (en) 2002-03-16 2003-03-17 MAGNETRON
US10/941,072 US7199525B2 (en) 2001-02-13 2004-09-15 Strapped magnetron with a dielectric resonator for absorbing radiation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0206242A GB2386749B (en) 2002-03-16 2002-03-16 Magnetron

Publications (3)

Publication Number Publication Date
GB0206242D0 GB0206242D0 (en) 2002-05-01
GB2386749A GB2386749A (en) 2003-09-24
GB2386749B true GB2386749B (en) 2005-11-23

Family

ID=9933109

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0206242A Expired - Fee Related GB2386749B (en) 2001-02-13 2002-03-16 Magnetron

Country Status (9)

Country Link
EP (1) EP1485933B1 (en)
JP (1) JP4301958B2 (en)
KR (1) KR20040102044A (en)
CN (1) CN100342478C (en)
AT (1) ATE441201T1 (en)
AU (1) AU2003212532A1 (en)
DE (1) DE60328975D1 (en)
GB (1) GB2386749B (en)
WO (1) WO2003079394A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3379926A (en) * 1964-11-18 1968-04-23 Westinghouse Electric Corp Coaxial magnetron having slot mode suppressing lossy material in anode resonators
US3706910A (en) * 1971-05-28 1972-12-19 Raytheon Co Coaxial magnetron slot mode suppressor
GB1570417A (en) * 1976-09-23 1980-07-02 Varian Associates Electronic oscillator slot mode absorber
US4588965A (en) * 1984-06-25 1986-05-13 Varian Associates, Inc. Coaxial magnetron using the TE111 mode
JPH08162030A (en) * 1994-12-05 1996-06-21 Sharp Corp Magnetron
GB2372147A (en) * 2001-02-13 2002-08-14 Marconi Applied Techn Ltd Magnetron with radiation absorbing dielectric resonator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014152A (en) * 1957-12-05 1961-12-19 Jr Earl J Shelton Magnetron mode loading
GB1134734A (en) * 1966-08-10 1968-11-27 Westinghouse Electric Corp Coaxial magnetron
US3471744A (en) * 1967-09-01 1969-10-07 Varian Associates Coaxial magnetron having a segmented ring slot mode absorber
JPS62119836A (en) * 1985-11-20 1987-06-01 Sanyo Electric Co Ltd Magnetron
GB2360872B (en) * 2000-03-30 2004-05-05 Marconi Applied Techn Ltd Magnetrons

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3379926A (en) * 1964-11-18 1968-04-23 Westinghouse Electric Corp Coaxial magnetron having slot mode suppressing lossy material in anode resonators
US3706910A (en) * 1971-05-28 1972-12-19 Raytheon Co Coaxial magnetron slot mode suppressor
GB1570417A (en) * 1976-09-23 1980-07-02 Varian Associates Electronic oscillator slot mode absorber
US4588965A (en) * 1984-06-25 1986-05-13 Varian Associates, Inc. Coaxial magnetron using the TE111 mode
JPH08162030A (en) * 1994-12-05 1996-06-21 Sharp Corp Magnetron
GB2372147A (en) * 2001-02-13 2002-08-14 Marconi Applied Techn Ltd Magnetron with radiation absorbing dielectric resonator

Also Published As

Publication number Publication date
CN100342478C (en) 2007-10-10
WO2003079394A1 (en) 2003-09-25
GB2386749A (en) 2003-09-24
KR20040102044A (en) 2004-12-03
CN1643637A (en) 2005-07-20
EP1485933A1 (en) 2004-12-15
ATE441201T1 (en) 2009-09-15
EP1485933B1 (en) 2009-08-26
GB0206242D0 (en) 2002-05-01
DE60328975D1 (en) 2009-10-08
JP4301958B2 (en) 2009-07-22
AU2003212532A1 (en) 2003-09-29
JP2005521201A (en) 2005-07-14

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20100316