Patent ID: 6496112
Filing Date: 2002-12-17
Classification: G06K

Abstract:
A radio frequency identification tag comprising:a tag circuit and at least a first tag antenna element, wherein at least the first tag antenna element is coupled to the tag circuit, at least the first tag antenna element is arranged for capacitively receiving an â€œon/offâ€  command signal from an electrostatic exciter and coupling the â€œon/offâ€  command signal to the tag circuit, the tag circuit, comprising a programmable tag circuit state,is arranged for setting the programmable tag circuit state based on the â€œon/offâ€  command signal, the programmable tag circuit state is set to exactly one state of an â€œonâ€  state and an â€œoffâ€  state, at least the first tag antenna element is arranged for capacitively receiving an exciter signal from the electrostatic exciter and coupling the exciter signal to the tag circuit, the tag circuit is arranged for becoming energized based on the exciter signal and, when the programmable tag circuit state is set to â€œonâ€ , the tag circuit and at least the first tag antenna element modulates a first signal, and when the programmable tag circuit state is set to â€œoff,â€  the tag circuit and at least the first tag antenna element ceases to modulate the first signal.