RADIO FREQUENCY ID DOPPLER MOTION DETECTOR

摘要

A system and method for a radio frequency identification (RFID) reader fo r use in an RFID detection system. The reader has an RF source for generatin g RF signals. An antenna is coupled to the RF source. The antenna transmits interrogation RF signals to one or more RFID markers within an interrogation zone and receives communication signals from one or more items within the i nterrogation zone. The communication signals include Doppler signals indicat ing movement of an item within the interrogation zone. A receiver receives t he communication signals and motion detection circuitry detects the Doppler signals.