PULSED POWER METHOD FOR INCREASED READ RANGE FOR A RADIO FREQUENCY IDENTIFICATION READER

摘要

A method to power a radio frequency identification (RFID) reader to increase multi~tag reading capability and increase the reading range of a passive tag without maximizing the continuous transmitted power level is provided. The RFID reader transmits a pulsed interrogation signal until an RFID tag respon se is received, and then switches to a continuous and pulsed power scheme. The continuous power emitted maintains the power supplied to the RFID tags so th e tags will not reset due to loss of power. The pulsed signal permits reading the tags at longer ranges, especially when there is a plurality of tags in t he area.