Title:
RESONANT CIRCUIT AND ANTENNA DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/014975
Kind Code:
A1
Abstract:
Provided are a resonant circuit and an antenna device capable of obtaining a low resonant frequency without increasing the size of the coil, and capable of improving communication performance. In a resonant circuit, two coil-shaped conductors (11, 15) are arranged so that the coils are opposed with a dielectric sheet (10) therebetween. The two coil-shaped conductors (11, 15) are connected through a capacitor at an opposing portion, and are wound so that the directions in which currents flow in the respective coils (arrow A) are the same direction in the planar view. A opposing area of the coil-shaped conductors (11, 15) in at least a part of the outermost winding and/or the innermost winding is larger than other opposing areas, and respective ends of the conductors are power feeding units(11a, 15b).
Inventors:
ITO Hiromitsu (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2011/067254
Publication Date:
February 02, 2012
Filing Date:
July 28, 2011
Export Citation:
Assignee:
MURATA MANUFACTURING CO., LTD. (10-1, Higashikotari 1-chome Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
株式会社村田製作所 (〒55 京都府長岡京市東神足１丁目１０番１号 Kyoto, 〒6178555, JP)
株式会社村田製作所 (〒55 京都府長岡京市東神足１丁目１０番１号 Kyoto, 〒6178555, JP)
International Classes:
H01Q7/00; G06K19/07; G06K19/077
Attorney, Agent or Firm:
MORISHITA Takekazu et al. (Hommachi Eiwa Building, 2-10 Minamihommachi 4-chome, Chuo-ku, Osaka-sh, Osaka 54, 〒5410054, JP)
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Claims:
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