A transceiver for reading RFID tags has a ferrite core antenna substantially circular in cross-section having a transmitting and receiving face producing substantially no RF energy below a plane of the transmitting and receiving face outside a peripheral surface of the ferrite core. A portion of the...http://www.google.fr/patents/US7268688?utm_source=gb-gplus-shareBrevet US7268688 - Shielded RFID transceiver with illuminated sensing surface
Shielded RFID transceiver with illuminated sensing surface
