US 12,488,215 B2
Chip card with radio-frequency antennas
Ahmed Ali, Courbevoie (FR)
Assigned to IDEMIA FRANCE, Courbevoie (FR)
Filed by IDEMIA FRANCE, Courbevoie (FR)
Filed on Dec. 19, 2023, as Appl. No. 18/545,287.
Claims priority of application No. 22 14390 (FR), filed on Dec. 23, 2022.
Prior Publication US 2024/0211716 A1, Jun. 27, 2024
Int. Cl. G06K 19/077 (2006.01)
CPC G06K 19/07722 (2013.01) [G06K 19/07773 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A chip card comprising:
a rectangular card body formed at least in part by a metal layer comprising a cut-out zone;
an RF chip;
a first RF antenna placed in or facing the cut-out zone and electrically connected to the RF chip,
said metal layer consisting of a first region and a second region that are delineated by a straight line parallel to a short side of the chip card, the first region containing the cut-out zone;
a first slit connecting the cut-out zone to a peripheral edge of the first region;
a second slit opening either onto a peripheral edge of the metal layer or into the cut-out zone, the second slit ending with a closed portion in the second region; and
a second RF antenna electrically insulated from the metal layer and from the first RF antenna and configured to allow coupling to the first RF antenna, the second RF antenna comprising at least one portion of turn located facing the first slit and at least one portion of turn located facing said second slit.