RFID apparatus includes transmission means for transmitting an RF signal; reception means for receiving a modulated RF signal; and demodulation means for demodulating a received modulated signal. The apparatus comprises generating means for generating a RF signal dependent on an incoming RF signal, the...http://www.google.fr/patents/US20080018433?utm_source=gb-gplus-shareBrevet US20080018433 - Rfid Apparatus
