Antenna device adapted for portable radio apparatus

Details Antenna device adapted for portable radio apparatus Antenna device adapted for portable radio apparatus

2007-10-10

2010-12-07

Wimer, Michael C (Department: 2821)

Communications: radio wave antennas

Antennas

Including magnetic material

Reexamination Certificate

active

07847750

ABSTRACT:
An antenna device includes a printed circuit board and an antenna element. The printed circuit board has a face a portion of which is formed by a conductive layer overlaid with a magnetic material layer made of anisotropic magnetic material. The magnetic material layer is arranged in such a way that a hard magnetization axis of the anisotropic magnetic material is directed almost parallel to the face. The antenna element is arranged almost parallel to the printed circuit board on a side of the face. The antenna element is arranged in such a way that an antenna current distributed on the antenna element if the antenna element is excited is directed almost perpendicular to the hard magnetization axis.

REFERENCES:
patent: 7088304 (2006-08-01), Endo et al.
patent: 7515111 (2009-04-01), Tsujimura et al.
patent: 2004/0046699 (2004-03-01), Amano et al.
patent: 2005/0162331 (2005-07-01), Endo et al.
patent: 2007/0052600 (2007-03-01), Kamitani et al.
patent: 2001-156484 (2001-06-01), None
patent: 2006-222873 (2006-08-01), None

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