System for locating an object using an antenna array with partially overlapping coils
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United States of America Patent
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Jun 9, 2020
Grant Date -
Sep 29, 2016
app pub date -
Nov 13, 2014
filing date -
Nov 14, 2013
priority date (Note) -
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Abstract
A system is provided for wirelessly locating objects. The system has a transceiver unit with an antenna array of two partially overlapping coils, which is used in combination with a passive electromagnetic reflector to track or locate the objects. The system is tuned to reflect and receive higher order harmonics of a transmitted signal frequency. The system is reliable in a highly reflective environment with no placement error detection due to reflections. A relatively large distance can be bridged with a minimum power and a small sensitive area to detect the coils, which increase the accuracy to determine the location of the electromagnetic reflector.
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