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 (JP)
Application Number:
PCT/JP2011/067254
Publication Date:
February 02, 2012
Filing Date:
July 28, 2011
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
ITO HIROMITSU (JP)
ITO HIROMITSU (JP)
International Classes:
H01Q7/00; G06K19/07; G06K19/077
Foreign References:
| JP2009105774A | 2009-05-14 | |||
| JP2004048233A | 2004-02-12 | |||
| JP2008278447A | 2008-11-13 |
Attorney, Agent or Firm:
MORISHITA Takekazu et al. (JP)
Takeichi Morishita (JP)
Takeichi Morishita (JP)
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Claims:
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