Electronic apparatus having antenna

Details Electronic apparatus having antenna Electronic apparatus having antenna

2007-12-11

2007-12-11

Phan, Tho (Department: 2821)

Communications: radio wave antennas

Antennas

Body-attached or connected

C343S787000

Reexamination Certificate

active

11267774

ABSTRACT:
To be able to downsize an electronic apparatus having an antenna having a plurality of antenna coils. A radio wave timepiece includes an antenna for receiving a radio wave signal including time information and the antenna is provided not to be projected from a contour of a timepiece movement. The antenna includes a plurality of antenna coils wound to laminate on a core, when the antenna101is used by being contained in a metal cabinet, the antenna coil wound around an upper layer and having a large inductance value is used, when the antenna is used by being contained in a plastic cabinet, the antenna coil wound around a lower layer and having a small inductance value is used, thereby, regardless of a kind of the cabinet, the radio wave timepiece can be downsized and a predetermined radio wave receiving sensitivity can be achieved.

REFERENCES:
patent: 4947179 (1990-08-01), Ganter et al.
patent: 2005/0078045 (2005-04-01), Sano
patent: 19607806 (1996-09-01), None
patent: 1420477 (2004-05-01), None
patent: 03060520 (2003-02-01), None
patent: 200343167 (2003-02-01), None
patent: 3526874 (2004-02-01), None
patent: 0703513 (1996-03-01), None
patent: 9763798 (1997-11-01), None

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