Antenna, and radio-controlled timepiece, keyless entry...

Details Antenna, and radio-controlled timepiece, keyless entry... Antenna, and radio-controlled timepiece, keyless entry...

2006-07-03

2008-12-09

Dinh, Trinh V (Department: 2821)

Communications: radio wave antennas

Antennas

Including magnetic material

C343S788000, C343S718000

Reexamination Certificate

active

07463208

ABSTRACT:
An antenna comprising a magnetic main-path member comprising a coil wound around a magnetic core, and a magnetic sub-path member magnetically connected to the magnetic core for constituting a substantially closed magnetic path with the magnetic main-path member, the antenna meeting the relation of (S/N)1>(S/N)0, wherein (S/N)1is a ratio of a signal voltage S obtained from the coil to a noise voltage N in this antenna, and (S/N)0is a ratio of a signal voltage S to a noise voltage N in an antenna having the same structure except for having no magnetic sub-path member.

REFERENCES:
patent: 7088304 (2006-08-01), Endo et al.
patent: 2005/0078045 (2005-04-01), Sano
patent: 2006/0152427 (2006-07-01), Ueda et al.
patent: 2007/0120758 (2007-05-01), Takahashi
patent: 08-271659 (1996-10-01), None
patent: 2002-168978 (2002-06-01), None
patent: 2003-110341 (2003-04-01), None
patent: 2004-104551 (2004-04-01), None

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