Chip card comprising an antenna
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United States of America Patent
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-
Nov 11, 2003
Grant Date -
N/A
app pub date -
Apr 12, 2002
filing date -
May 7, 1999
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention concerns an RF-type contactless chip card, comprising a sensor coil (1), an electronic circuit (2) connected to the coil and an antenna (3) made form a material with high magnetic permeability, including a first part located substantially in the plane of the coil upper surface (A), a second part located substantially in the plane of the coil lower surface (B) and a connecting part (C) located in the center of the coil. The latter part is dimensioned relative to the antenna (3) such that the voltages induced at its terminals are of the same order of magnitude, whether the antenna is parallel or perpendicular to the lines of flux generated by a reader.
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