Methods and apparatus for locating RFID tags

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11215691
APP PUB NO 20200096599A1
SERIAL NO

16579949

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Abstract

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A radio frequency identification (RFID) system includes an array of antennas to distinguish line-of-sight (LOS) paths from non-line-of-sight (NLOS) paths. The distance between adjacent antennas in the array of antennas is less than half the wavelength of the radio frequency (RF) signal of the system. Each antenna in the antenna array is also digitally controlled to change relative phase difference among the antennas, thereby allowing digital steering of the array of antennas across angles of arrival (AOAs) between 0 and π. The digital steering generates a plot of signal amplitudes as a function of AOAs. LOS paths are distinguished from NLOS paths based on the shapes (e.g., depth, gradient, etc.) of local extremes (e.g., maxima or minima) in the plot.

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Patent Owner(s)

Patent OwnerAddress
AUTOMATON INC15150 AVENUE OF SCIENCE SUITE 200 SAN DIEGO CA 92128

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Adlin, Tamara Seattle, US 6 73
Blair, Adam New York, US 11 79
Hewett, Spencer New York, US 19 174
Murphy, Michael Brooklyn, US 217 3591
Seiff, Ken Hartsdale, US 6 73
Wieman, Mark Seattle, US 8 90

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