Patent ID: 8395507

Claim:
A radio frequency identification (RFID) system, comprising: a plurality of RFID readers, including: a plurality of antennas that each generates an electromagnetic field that includes a magnetic field component, and a plurality of shorting loops that each at least partially surrounds the antenna, wherein each shorting loop distorts the magnetic field component to improve a definition of a border of a read region related to each antenna, wherein each read region together form a plurality of adjacent read regions; and a plurality of RFID tokens, including a first RFID token that is within a first read region, a second RFID token that is within a second read region, and a third RFID token that is outside of and adjacent to the first read region, and outside of the second read region, wherein the plurality of RFID readers operates to detect that the first RFID token is within the first read region, to detect that the second RFID token is within the second read region, not to detect that the third RFID token is within the first read region, and not to detect that the third RFID token is within the second read region, in accordance with each shorting loop improving the definition of the border of the read region related to each antenna.