Institut Polytechnique De Grenoble

Centre National De La Recherche Scientifique

Universite Claude Bernard – Lyon1

Université Grenoble Alpes

Institut National Des Sciences Appliquees De Lyon

Ecole Centrale De Lyon

Tagsys

Yvan Duroc

Smail Tedjini

Christophe Loussert

Marc Recouly

Gianfranco Andia Vera

Dahmane Allane

A novel RFID communication device is proposed which allows the detection and electronic processing not only of the response signal backscattered at the fundamental frequency fof the reader, but also at least one response signal backscattered at a harmonic frequency, before feeding them to the conventional receive chain of an RFID reader. The joint use of the signal at the fundamental frequency of the reader and at least one signal at a harmonic frequency allows the reader's performance to be improved. The RFID reader can additionally be provided with novel functionalities by virtue of suitable software processing. It is applicable to the field of communications between a reader and passive transponders in UHF RFID and to the field of the Internet of Things.

RFID reader and associated complementary device

An RFID communication system comprises an interrogator including a signal generator for generating an interrogation signal at a predetermined frequency fand a first interrogator antenna for transmitting said interrogation signal and receiving a first reply signal at a frequency f, and processing means, and a passive transponder including a first transponder antenna for transmitting said first rely signal and receiving said interrogation signal and a chip comprising nonlinear components for generating said first reply signal in response to the interrogation signal. The interrogator is arranged to receive a second reply signal whose frequency is a multiple of the predetermined frequency f, said multiple being either odd or even, said second reply frequency being generated by the nonlinear components of the transponder chip, said first and second reply signals being processed by the processing means of the interrogator in order to complete or improve the functionality of the system.

RFID communication system

Growing community of inventors

Valence, France

Yvan Duroc