Title:
ANTENNA MODULE MAGNETIC CORE MEMBER, ANTENNA MODULE, AND MOBILE INFORMATION TERMINAL USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2006/013718
Kind Code:
A1
Abstract:
There are provided an antenna module magnetic core member, an antenna module, and a mobile information terminal using the same capable of increasing a communication distance without increasing the module thickness. The magnetic core member (18) for the antenna module (10) forms an annular groove (18c) as an indentation in a surface of the side where an antenna coil (15) is formed and to which the loop portion of the antenna coil (15) opposes. Eddy current generated in the magnetic core member (18) in a high-frequency magnetic field is concentrated on a surface of the magnetic core member (18) of the side where the antenna coil (15) is formed and to which the loop portion of the antenna coil (15) opposes. Accordingly, the annular groove (18c) is formed in that area so as to reduce the eddy current generated, there by improving the communication distance characteristic of the antenna module.
Inventors:
AKIHO HIRAKU
RYOSON HIROYUKI
GOTO KAZUO
RYOSON HIROYUKI
GOTO KAZUO
Application Number:
PCT/JP2005/013231
Publication Date:
February 09, 2006
Filing Date:
July 19, 2005
Export Citation:
Assignee:
SONY CORP (JP)
AKIHO HIRAKU
RYOSON HIROYUKI
GOTO KAZUO
AKIHO HIRAKU
RYOSON HIROYUKI
GOTO KAZUO
International Classes:
H01Q7/06; H01F17/04; G06K19/077
Foreign References:
| JPH09139698A | 1997-05-27 | |||
| JP2002290131A | 2002-10-04 | |||
| JP2003037861A | 2003-02-07 |
Other References:
See also references of EP 1775794A4
Attorney, Agent or Firm:
Nakamura, Tomoyuki c/o Miyoshi International Patent Office (Toranomon Kotohira Tower 2-8, Toranomon
1-chome, Minato-k, Tokyo 01, JP)
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