Smart card with switchable matching antenna
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United States of America Patent
Stats
-
Dec 4, 2012
Grant Date -
Dec 18, 2008
app pub date -
Aug 25, 2008
filing date -
Apr 10, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A smart card having a multi-layer substrate; a transponder module disposed in a first layer of the multi-layer substrate; a first antenna disposed in the first layer of the multi-layer substrate; and a second antenna disposed in a second layer of the multi-layer substrate. A switch and a capacitor in series with the second antenna. The first antenna may be tuned to a different frequency than the second antenna. An RFID chip and antenna in a mold mass disposed in a recess in the first layer of a substrate, behind a hologram disposed on the first layer of the substrate. The switch for the second antenna disposed under the RFID chip. A layer of ferrite material disposed between the hologram and the RFID chip. LEDs disposed behind the hologram.
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