Communications: radio wave antennas – Antennas – Loop type
Reexamination Certificate
2004-04-01
2008-03-04
Nguyen, Hoang V. (Department: 2821)
Communications: radio wave antennas
Antennas
Loop type
C343S741000, C343S742000, C343S866000, C340S572100, C340S572200
Reexamination Certificate
active
07339546
ABSTRACT:
A contactless reading system, wherein a chip card is fixed on a planar support of an object such as a book (11) for identification by means of the data contained in the chip card, and a mobile reader (16) provided with an antenna in order to read the data of the card. The antenna of the reader (16) consists of a small-sized convolution disposed in a series with a large-sized convolution, which are concentric and which have the same winding direction. A maximum value is obtained for the component (H) of the electromagnetic field produced by the antenna parallel to the antenna at a given distance from the antenna. Maximum reception by the chip card of electromagnetic signals emitted by the antenna is obtained when the antenna is disposed in a perpendicular position in relation to the support of the card and at the given distance from the card.
REFERENCES:
patent: 6486780 (2002-11-01), Garber et al.
patent: 6642896 (2003-11-01), Kim
patent: 2004/0100413 (2004-05-01), Waldner
patent: 0 766 200 (1997-04-01), None
patent: 11-313017 (1999-11-01), None
patent: 2003-69336 (2003-07-01), None
Pangaud Nicolas
Sabbah Elias
ASK S.A.
Karacsony Robert
Lydon James C.
Nguyen Hoang V.
LandOfFree
Contactless reading system for chip cards placed on objects does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Contactless reading system for chip cards placed on objects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Contactless reading system for chip cards placed on objects will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3960092