RFID device with patterned antenna, and method of making
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United States of America Patent
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Jun 6, 2006
Grant Date -
Sep 15, 2005
app pub date -
Mar 11, 2004
filing date -
Mar 11, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A radio frequency identification device (RFID) antenna structure includes electrically-conductive material. The antenna structure includes low effective resistance-material areas and high effective resistance areas in regions where there would be little current flow if there were more low effective resistance material. The high effective resistance areas may be spaces within the antenna structure in which there is substantially no electrically conductive material. Alternatively, high effective resistance material in the high effective resistance areas may have a non-zero lower electrical conductivity than the low effective resistance material in the low effective resistance-material areas. Conductive material for the antenna structure may include conductive ink. By reducing or eliminating the amount of conductive material in the high effective resistance areas, it will be appreciated that reduced-cost devices may be obtained.
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