Antenna apparatus, and communications apparatus using same

Details Antenna apparatus, and communications apparatus using same Antenna apparatus, and communications apparatus using same

2007-02-27

2007-02-27

Dinh, Trinh (Department: 2821)

Communications: radio wave antennas

Antennas

High frequency type loops

C343S867000

Reexamination Certificate

active

11244727

ABSTRACT:
An antenna apparatus (60) is provided which is used in a recorder and/or player to write and read data to and from a contactless IC card (1). The antenna apparatus (60) includes a loop coil (61) to radiate an electromagnetic field for magnetic coupling with a loop coil (4) at the IC card (1) to send and receive data to and from the IC card (1), and a magnetic sheet (62) disposed to face the main side of the loop coil (61), opposite to the main side facing the IC card (1). The magnetic sheet (62) has the specific permeability μ′ and product Ms·t of saturation magnetization Ms and thickness t thereof set in accordance with a necessary range of communications with the contactless IC card (1).

REFERENCES:
patent: 5424527 (1995-06-01), Takahira
patent: 5574273 (1996-11-01), Nakagawa et al.
patent: 5583474 (1996-12-01), Mizoguchi et al.
patent: 5710421 (1998-01-01), Kokubu
patent: 5764196 (1998-06-01), Fujimoto et al.
patent: 5821525 (1998-10-01), Takebayashi
patent: 6481623 (2002-11-01), Grant et al.
patent: 6591494 (2003-07-01), Okamura et al.
patent: 6593167 (2003-07-01), Dobashi et al.
patent: 6975834 (2005-12-01), Forster
patent: 6992630 (2006-01-01), Parsche
patent: 2001/0000659 (2001-05-01), Hayashi et al.
patent: 2003/0016506 (2003-01-01), Fujii
patent: 2003/0178495 (2003-09-01), Jones et al.
patent: 2004/0104268 (2004-06-01), Bailey
patent: 2004/0169087 (2004-09-01), Lasch et al.
patent: 2004/0256468 (2004-12-01), Akiho et al.
patent: 19542900 (1995-11-01), None
patent: 09139698 (1995-11-01), None
patent: 8-16745 (1996-01-01), None
patent: 9-284038 (1997-10-01), None
patent: 10-107531 (1998-04-01), None
patent: 10-157353 (1998-06-01), None
patent: 2000-68891 (2000-03-01), None
patent: 2000-162314 (2000-06-01), None
patent: 2002-298095 (2002-10-01), None
patent: 2002-324215 (2002-11-01), None
patent: 2003-99733 (2003-04-01), None

Affiliated with

Also associated with

Rating

Antenna apparatus, and communications apparatus using same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Antenna apparatus, and communications apparatus using same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antenna apparatus, and communications apparatus using same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3869914