Smart Passive RFID Reader with Adaptive Beamforming Capability

摘要

A smart passive RFID reader includes an RFID reader module, a microcontroller providing a means for increasing the probability of detecting correct passive RFID tags and decreasing the probability of detecting incorrect passive RFID tags, and antennas connected to the RFID reader module, wherein adjacent antennas have orthogonal polarization and the antennas each have a pivoting axis, whereby rotating the antennas about their pivoting axes causes a change in the overlap of the antenna beam radiation patterns and thereby provides a means for adaptive beamforming in order to improve tag reading.

主权项

1. A smart passive RFID reader comprising:
a means for powering said smart passive RFID reader; an RFID reader module configured to send and receive signals from passive RFID tags; a plurality of antennas connected to said RFID reader module; said antennas each having a primary antenna plane; said antennas each having a pivoting axis proximate said antenna and substantially parallel to said antenna plane; at least two of said antennas being adjacent, with said pivoting axes being parallel; said adjacent antennas having orthogonal polarization; said adjacent antennas each having a beam radiation pattern; andwhereby rotating said antennas about said pivoting axes causes a change in the overlap of said beam radiation patterns and thereby provides a means for adaptive beamforming in order to improve tag reading.