Phase acquisition techniques for RFID multistatic setups

[Display omitted] •Two wireless phase acquisition techniques for signals backscattered by RFID tags are presented.•Both techniques simplify the deployment of RFID multistatic systems.•A localization system with centimetric accuracy was developed using the proposed phase retrieval techniques. The aim...

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Bibliographic Details
Published in:Sensors and actuators. A. Physical. 2018-02, Vol.270, p.97-107
Main Authors: Alvarez-Narciandi, Guillermo, Laviada, Jaime, Pino, Marcos R., Las-Heras, Fernando
Format: Article
Language:English
Subjects:
Localization system
Microstructure
Multistatic
Phase retrieval
Radio frequency identification
RFID
Scattering
Sensors
Transmitters
Very high frequencies
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Summary:[Display omitted] •Two wireless phase acquisition techniques for signals backscattered by RFID tags are presented.•Both techniques simplify the deployment of RFID multistatic systems.•A localization system with centimetric accuracy was developed using the proposed phase retrieval techniques. The aim of this paper is to present two different schemes to retrieve the phase of the field scattered by a UHF RFID tag without requiring a physical connection between the transmitter and the receiver systems. Thus, the phase angle can be comfortably measured in a multistatic, easy to deploy RFID sensor network for different purposes such as location and imaging. The accuracy of both schemes is validated against the one achieved by resorting to a physical connection between the transmitter and the receiver, demonstrating an excellent accuracy. Finally, a localization scheme based on this acquired information is presented to illustrate the use of the proposed phase retrieval approaches.
ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2017.12.012