The invention is directed to an improved RFID system. The system provides a tag having a power management unit that selectively powers a transmission unit to transmit at least a first signal having a first frequency. The tag can be configured to transmit a second signal having a second frequency as well. The power management unit selectively powers the transmission unit based on the level of power stored in the tag, a duty cycle associated with the tag, or a combination of the two.
申请公布号
WO2008055212(A2)
申请公布日期
2008.05.08
申请号
WO2007US83184
申请日期
2007.10.31
申请人
GT ACQUISITION SUB, INC.;GEISSLER, RANDOLPH, K.;LEWIS, STEVEN, ARTHUR;NELSON, SCOTT, ALAN
发明人
GEISSLER, RANDOLPH, K.;LEWIS, STEVEN, ARTHUR;NELSON, SCOTT, ALAN