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 response 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 the 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 the area.
