System and method for communicating with multiple transponders
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United States of America Patent
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Mar 18, 2003
Grant Date -
N/A
app pub date -
Dec 1, 1998
filing date -
Dec 1, 1998
priority date (Note) -
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Abstract
The object of the invention is a system and method for identifying and communicating with a plurality of transponders which are at the same time in the same interrogation field. The system is based on an interrogator which sends interrogation bursts in a periodical manner, and transponders which send the response back with a random delay related to the end-of-burst event. The system is primarily suitable for passive (no additional power supply) transponders, but can also be used for active transponders.
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