Antenna and communication system using the same

Details Antenna and communication system using the same Antenna and communication system using the same

2006-04-04

2006-04-04

Phan, Tho (Department: 2821)

Communications: radio wave antennas

Antennas

Including magnetic material

C343S787000

Reexamination Certificate

active

07023395

ABSTRACT:
An antenna includes a first core made of magnetic material, a coil including a conductive wire wound around a predetermined region of the first core, and a second core made of magnetic material. The second core is operable to move an inside of the coil. The antenna has a resonant frequency adjustable over a wide rage.

REFERENCES:
patent: 4978966 (1990-12-01), Takizawa et al.
patent: 5408243 (1995-04-01), D'Hont
patent: 6249259 (2001-06-01), Goodman et al.
patent: 6400330 (2002-06-01), Maruyama et al.
patent: 2003/0107523 (2003-06-01), Yahata et al.
patent: 2004/0061660 (2004-04-01), Yoshida et al.
patent: 10-341105 (1998-12-01), None

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