CONTACTLESS IDENTIFICATION DEVICE
First Claim
1. A contactless identification device comprising:
- a capacitive element;
an inductive element connected in parallel with and on a common layer of the contactless identification device with the capacitive element;
wherein the inductive element comprises a conducting wire or strip defining a single-turn flat loop and two connection terminals;
wherein the capacitive element comprises a first conducting portion and a second conducting portion, the first and second conducting portions being coplanar, the first conducting portion being connected to a first connection terminal of the inductive element and the second conducting portion being connected to a second connection terminal of the inductive element;
an integrated circuit interoperably connected between the first and second connection terminals of the inductive element;
wherein at least part of the first conducting portion is shaped as a first curve comprising a plurality of connected segments; and
wherein the plurality of connected segments are spatially arranged so that no adjacent connected segments form a longer straight segment.
5 Assignments
0 Petitions
Accused Products
Abstract
A contactless identification device includes a flat conducting structure as an electromagnetic sensor or transducer. An electromagnetic sensor architecture is suitable for all applications where contactless or hybrid cards are of advantage: high volume paying and toll applications (public transportation, public sport events, person and good identification, access to controlled areas, control of shipment of goods, handling of luggage, product control in chain production environments), etc. The contact-less identification device has had its performance enhanced by the use of space-filling techniques in the design of its electromagnetic sensor and by the use of a planar capacitor in conjunction with said flat conducting structure.
20 Citations
20 Claims
-
1. A contactless identification device comprising:
-
a capacitive element; an inductive element connected in parallel with and on a common layer of the contactless identification device with the capacitive element; wherein the inductive element comprises a conducting wire or strip defining a single-turn flat loop and two connection terminals; wherein the capacitive element comprises a first conducting portion and a second conducting portion, the first and second conducting portions being coplanar, the first conducting portion being connected to a first connection terminal of the inductive element and the second conducting portion being connected to a second connection terminal of the inductive element; an integrated circuit interoperably connected between the first and second connection terminals of the inductive element; wherein at least part of the first conducting portion is shaped as a first curve comprising a plurality of connected segments; and wherein the plurality of connected segments are spatially arranged so that no adjacent connected segments form a longer straight segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A contactless identification device comprising:
-
an integrated circuit; an electromagnetic sensor configured as a dipole, the dipole comprising first and second conducting arms; a capacitive element comprising first and second conducting surfaces; wherein the electromagnetic sensor and the capacitive element are on a common layer of the contactless identification device; wherein the first conducting surface is connected to an end of the first conducting arm and the second conducting surface is connected to an end of the second conducting arm; wherein at least a portion of at least one of the first and second conducting arms is shaped as a curve comprising a plurality of connected segments; and wherein the plurality of connected segments are spatially arranged so that no adjacent connected segments form a longer straight segment. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification