Patent ID: 6040773
Filing Date: 2000-03-21
Classification: G06K

Abstract:
A radio frequency identification tag including a tag circuit, a tag common electrode and a tag antenna element, the tag common electrode and the tag antenna element coupled to the tag circuit,the tag common electrode arranged for coupling to ground,the tag antenna element arranged for electrostatically receiving an exciter signal from a proximately-located electrostatic exciter and coupling the exciter signal to the tag circuit,the tag circuit arranged for becoming energized based on the exciter signal, generating a read signal and coupling the read signal to the tag antenna element,the tag antenna element arranged for electrostatically sending the read signal to a proximately-located electrostatic reader,exactly one of the tag common electrode and the tag antenna element arranged for magnetically storing tag state information such that the tag state information can be magnetically read by a proximately-located magnetic reader, the tag state information comprising exactly one state of two possible states, andthe read signal being a reflected signal.