| 20090152364 | RFID CARD WITH PIEZOELECTRIC ELEMENT - A radio-frequency identification (RFID) card includes an RFID element that is adapted to store RFID data information, an antenna, electrically connected at each of two ends to the RFID element, and a piezoelectric element, electrically connected to at least one of the two ends of the antenna, whereby mechanical actuation of the piezoelectric element enables the antenna to be energized by a transmission from an RFID reader terminal, thereby powering the transmission of RFID data information from the RFID element to the RFID reader terminal. An RFID system includes such a card, and an RFID reader terminal. A method of controlling the transmission of RFID data information from an RFID card includes positioning an RFID card, having a piezoelectric element electrically connected to an antenna that is electrically connected at each of two ends to an RFID element, in the vicinity of an RFID reader terminal; mechanically actuating the piezoelectric element; as a function of the mechanically actuating step, enabling the antenna to be energized by a transmission from an RFID reader terminal; and using the energy from the transmission from the RFID reader terminal, powering the transmission of RFID data information from the RFID element to the RFID reader terminal. | 06-18-2009 |
