Identification apparatus and methods

Details Identification apparatus and methods Identification apparatus and methods

1992-11-18

1994-04-12

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Radar transponder system

Unique identity

342 51, G01S 1380

Patent

active

053029542

ABSTRACT:
An identification system comprising a transponder having receiver means adapted to extract powering energy from a surrounding electromagnet field, transponder transmitter means adapted to transmit at least one unique signal from the transponder, frequency generating means for generating a plurality of pre-determined frequencies, each frequency adapted to carry the signal from the transmitter means to an interrogator receiver means adapted to receive said signals to achieve identification of said transponder, said transponder transmitting signals successively or repetitively using at each successive or repetitive transmission a newly selected frequency or set of newly selected frequencies.

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