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US 8,540,162 B2Granted
Microcircuit device including a near-field communication antenna circuit
AssigneeOberthur Technologies
InventorsLoïc Le Garrec, Agnès Duval
Life of this patent
Estimating the term…
Abstract
This circuit (32) comprises a first antenna (34) connected to the microcircuit (14) and capable of supplying power to the microcircuit (14) by electromagnetic coupling with an external terminal and a second antenna (36) electromagnetically coupled to the first antenna (34) while remaining electrically isolated from the latter. In addition, the first (34) and second (36) antennas consist respectively of first and second windings having opposite winding directions as defined from the same observation point.
Claims17
A microcircuit device comprising a near-field communication antenna circuit comprising:
- an antenna connected to a microcircuit of the device and configured to supply to the microcircuit power provided to the antenna by an external terminal at a supply frequency of the microcircuit;
- and
- a coupled coil inductively coupled with a coil of the antenna while still remaining electrically isolated from the antenna, the coil of the antenna and the coupled coil having opposite winding directions as defined from the same observation point.
Dependencies are inferred from the claim text.