Method and apparatus to mitigate multipath in RFID

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United States of America Patent

PATENT NO 9864881
SERIAL NO

14961066

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Abstract

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A distance between at least one antenna of an interrogation system and a transponder, such as an RFID tag, is determined based on derivatives with respect to frequency of the phase and the signal strength of responses transmitted by the transponder and received at the at least one antenna. The derivatives of the phase and the signal strength facilitate compensating for sources of multipath interference. Determining changes in distance may further facilitate determining location, speed, or bearing of the transponder by the interrogation system.

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Patent Owner(s)

  • INTERMEC IP CORP.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nikitin, Pavel Seattle, US 73 1170

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