Abstract: 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 f0 of 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.

Abstract: 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 f0 of 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.

Abstract: An RFID communication system comprises an interrogator including a signal generator for generating an interrogation signal at a predetermined frequency f0 and a first interrogator antenna for transmitting said interrogation signal and receiving a first reply signal at a frequency f0, 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 f0, 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.

Abstract: The present invention relates to a RFID communication system comprising an interrogator (10) including a signal generator (12) for generating an interrogation signal at a predetermined frequency f0 and a first interrogator antenna (11) for transmitting said interrogation signal and receiving a first reply signal at a frequency f0, and processing means (13), and a passive transponder (20) including a first transponder antenna (21) for receiving said interrogation signal and a chip (22) comprising nonlinear components for generating said first reply signal in response to the interrogation signal, said first reply signal being transmitted by said first transponder antenna.