Sizing of an electromagnetic transponder system for a dedicated distant coupling operation
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United States of America Patent
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May 23, 2006
Grant Date -
N/A
app pub date -
Jul 13, 2000
filing date -
Jul 20, 1999
priority date (Note) -
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Abstract
A system of contactless electromagnetic transmission between a terminal including a series oscillating circuit for generating an electromagnetic field and a transponder including a parallel oscillating circuit, these oscillating circuits being sized so that the coupling coefficient between them rapidly decreases when the distance separating the transponder from the terminal becomes smaller than a predetermined value.
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