PORTABLE ELECTRONIC DEVICE - MURATA MANUFACTURING CO

Title:

PORTABLE ELECTRONIC DEVICE

Document Type and Number:

WIPO Patent Application WO/2007/105348

Kind Code:

A1

Abstract:

A portable electronic device is provided with a circuit board (100), and an antenna coil (200) mounted on the circuit board (100). The antenna coil (200) is provided with a magnetic core (201), and a coil (202) wound on the both sides by having in between a section (203) where no coil is wound. The coil (202) has different winding directions with the section (203) in between. The antenna coil is configured to satisfy inequalities of Y≥X≥0.8Y, where X is the length of the magnetic core (201), and Y is a distance between the two intersecting points of a virtual line, which is obtained by projecting the center line on the circuit board (100), and the outer circumference of the circuit board (100).

Inventors:

KUBO HIROYUKI (JP)
ITO HIROMITSU (JP)
YOSUI KUNIAKI (JP)
KOBAYASHI EIICHI (JP)

Application Number:

PCT/JP2006/325154

Publication Date:

September 20, 2007

Filing Date:

December 18, 2006

Export Citation:

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Assignee:

MURATA MANUFACTURING CO (JP)
KUBO HIROYUKI (JP)
ITO HIROMITSU (JP)
YOSUI KUNIAKI (JP)
KOBAYASHI EIICHI (JP)

International Classes:

H01Q7/08; G06K19/07; G06K19/077

Foreign References:

JPH11122146A	1999-04-30
JP2003318634A	2003-11-07
JP2005277524A	2005-10-06
JP2004166175A	2004-06-10
JPH03121577U	1991-12-12
JP2005192124A	2005-07-14
JP2004187159A	2004-07-02
JP2005333244A	2005-12-02
JP2003298348A	2003-10-17

Other References: