Title:
MAGNETIC CORE MEMBER, ANTENNA MODULE, AND MOBILE COMMUNICATION TERMINAL HAVING THE SAME
Document Type and Number:
WIPO Patent Application WO/2005/022687
Kind Code:
A1
Abstract:
A magnetic core member, an antenna module, and a mobile communication terminal having the same, wherein both an improvement of the communication characteristic of antenna coils and a sufficient electromagnetic shielding function from a shield plate can be achieved at the same time. A magnetic core member (4), in which soft magnetic powder (31) has been filled into an insulating material (30), is located between an antenna substrate on which antenna coils (11,12) have been provide and a conductive shield plate (3). The magnetic core member (4) has a two-layer structure comprising first (4A) and second (4B) layers, with the first layer (4A) having a smaller filling rate of soft magnetic powder (31) than the second layer (4B), whereby the magnetic core member (4) can exhibit different magnetic characteristics on a first surface (4a) opposed to the antenna substrate (2) and on a second surface (4b) opposed to the shield plate (3).
Inventors:
TAKAHASHI ISAO (JP)
NOZAWA KAZUO (JP)
AKIHO HIRAKU (JP)
NOZAWA KAZUO (JP)
AKIHO HIRAKU (JP)
Application Number:
PCT/JP2004/012783
Publication Date:
March 10, 2005
Filing Date:
August 27, 2004
Export Citation:
Assignee:
SONY CORP (JP)
TAKAHASHI ISAO (JP)
NOZAWA KAZUO (JP)
AKIHO HIRAKU (JP)
TAKAHASHI ISAO (JP)
NOZAWA KAZUO (JP)
AKIHO HIRAKU (JP)
International Classes:
G06K17/00; G06K19/077; H01Q1/24; H01Q1/38; G06K19/07; H01Q1/52; H01Q7/06; H01Q17/00; H01Q19/10; H04B1/59; (IPC1-7): H01Q7/06; H01Q1/52; G06K17/00
Foreign References:
JP2001331772A | 2001-11-30 | |||
JP2002094285A | 2002-03-29 | |||
JP2001156487A | 2001-06-08 | |||
JP2002344226A | 2002-11-29 |
Attorney, Agent or Firm:
Nakamura, Tomoyuki c/o Miyoshi International Patent Office (Toranomon Kotohira Tower 2-8, Toranomon 1-chom, Minato-ku Tokyo, JP)
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