Institut Polytechnique De Grenoble

Tagsys

Gianfranco Andia Vera

Christophe Loussert

Smail Tedjini

Marc Recouly

Yvan Duroc

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.

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Valence, France

Gianfranco Andia Vera