(19)
(11) EP 1 814 191 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.08.2007 Bulletin 2007/35

(43) Date of publication A2:
01.08.2007 Bulletin 2007/31

(21) Application number: 07101353.6

(22) Date of filing: 29.01.2007
(51) International Patent Classification (IPC): 
H01Q 1/22(2006.01)
G06K 19/077(2006.01)
 H01Q 7/00(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 30.01.2006 JP 2006020283
08.02.2006 JP 2006030810
02.06.2006 JP 2006154279

(71) Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
Osaka 571-8501 (JP)

(72) Inventors:
  • Nakamura, Kouichi c/o Matsushita Electric Industrial Co., Ltd.
    Osaka 540-6319 (JP)
  • Nishino, Tokuji c/o Matsushita Electric Industrial Co., Ltd.
    Osaka 540-6319 (JP)
  • Fukada, Kikuo c/o Matsushita Electric Industrial Co., Ltd.
    Osaka 540-6319 (JP)
  • Kiyosue, Kuniaki c/o Matsushita Electric Industrial Co., Ltd.
    Osaka 540-6319 (JP)
  • Yano, Hatsuhiro c/o Matsushita Electric Industrial Co., Ltd.
    Osaka 540-6319 (JP)
  • Fujimura, Munenori c/o Matsushita Electric Industrial Co., Ltd.
    Osaka 540-6319 (JP)
  • Fukushima Fumio c/o Matsushita Electric Industrial Co., Ltd.
    Osaka 540-6319 (JP)
  • Onaka, Yoshio c/o Matsushita Electric Industrial Co., Ltd.
    Osaka 540-6319 (JP)

(74) Representative: Eisenführ, Speiser & Partner 
Patentanwälte Rechtsanwälte Postfach 10 60 78
28060 Bremen
28060 Bremen (DE)

   


(54) Antenna apparatus


(57) An antenna apparatus includes a magnetic sheet and an antenna that is provided in the magnetic sheet and has a looped conductor and terminal electrode parts arranged at both ends of the conductor, and a matching circuit that is provided in the magnetic sheet, includes a first capacitor and a second capacitor each of which has a pair of electrodes, and sets a resonant frequency by the antenna and the first and second capacitors. One electrode of the pair of electrodes of the first capacitor is connected to one of the terminal electrode parts, and the other electrode of the pair of electrodes of the first capacitor is connected to the looped conductor. One electrode of the pair of electrodes of the second capacitor is connected to the other one of the terminal electrode parts, and the other electrode of the pair of electrodes of the second capacitor is connected to the looped conductor.







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