(19)
(11) EP 2 148 358 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.07.2010 Bulletin 2010/30

(43) Date of publication A2:
27.01.2010 Bulletin 2010/04

(21) Application number: 09166085.2

(22) Date of filing: 22.07.2009
(51) International Patent Classification (IPC): 
H01J 23/15(2006.01)
 H01J 25/587(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated Extension States:
AL BA RS

(30) Priority: 23.07.2008 JP 2008189971

(71) Applicant: Toshiba Hokuto Electronics Corporation
Hokkaido (JP)

(72) Inventor:
  • Doi, Sayuri
    Hokkaido (JP)

(74) Representative: Uchida, Kenji et al
SA Fedit-Loriot 38, avenue Hoche
75008 Paris
75008 Paris (FR)

   


(54) Magnetron device


(57) A magnetron device in which the wire's diameter of coils for the core type inductor and the air-core type inductor is 1.0 to 1.4 mm, and the cross sectional area of the magnetic core is 5 to 16 mm2, the number of turns of the coil for the air-core type inductor being


for the choke coil (35) accommodated in the filter box (31) disposed so as to cover the cathode terminal (33) of the magnetron tube body (10), which is comprised of the core type inductor (36) having the magnetic core (36a) and the air-core type inductor (37), and both thereof being serially connected together, where A (mm) is the wire's diameter of the coil, and D (mm) is the diameter of the magnetic core.







Search report