Magnetic core member, antenna module, and mobile...

Details Magnetic core member, antenna module, and mobile... Magnetic core member, antenna module, and mobile...

2008-07-29

2008-07-29

Chen, Shih-Chao (Department: 2821)

Communications: radio wave antennas

Antennas

Including magnetic material

C343S895000

Reexamination Certificate

active

07405709

ABSTRACT:
A magnetic core member, an antenna module, and a portable communication terminal having this, which have a configuration capable of satisfying enhancement of communication characteristics of antenna coils as well as their sufficient electromagnetic shielding function from a shield plate. A magnetic core member (4) is disposed between an antenna substrate having antenna coils (11), (12) formed therein and a conductive shield plate (3), and is formed by filling an insulating material (30) with a magnetic powder (31). The magnetic core member (4) has a two-layered structure including a first layer (4A) and a second layer (4B), thereby making a filling rate of the magnetic powder (31) in the first layer (4A) be lower than that of the magnetic powder (31) in the second layer (4B) so that a first surface (4a) on a side opposed to the antenna substrate (2) and a second surface (4b) on a side opposed to the shield plate (3) have magnetic properties different from each other.

REFERENCES:
patent: 5625366 (1997-04-01), D'Hont
patent: 5638080 (1997-06-01), Orthmann et al.
patent: 7088304 (2006-08-01), Endo et al.
patent: 2005/0162331 (2005-07-01), Endo et al.
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patent: 2001-331772 (2001-11-01), None
patent: 2002-94285 (2002-03-01), None
patent: 2002-344226 (2002-11-01), None

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