DUAL ANTENNA COIL TRANSPONDER SYSTEM

摘要

The present invention relates to a dual antenna coil (112, 114) identification system, and more particularly, to an interrogator (100) or reader for inductively coupling to a transponder and thereby extract data from the transponder. The magnetic field required to energize a transponder is generated by currents flowing through two essentially identical but opposite phased antenna coils arranged near the area where tags are to be read.