Transponder system

Details Transponder system Transponder system

G - Physics

01

S

G01S 5/14 (2006.01) G01S 5/10 (2006.01) G01S 13/82 (2006.01) G06K 7/00 (2006.01)

Patent

CA 2085243

In a first aspect, a transponder system is disclosed which comprises an interrogating source of H.F electromagnetic radiation, and a plurality of transponders which each include a token reader unit to receive a removable token, e.g. a smart card, inducting on board data processing capability. The transponders, or a group of transponders, are each arranged when interrogated to transmit a unique H.F. response modulated by information carried upon the token. In a second aspect the invention relates to s tranaponder system which is operatively connected to a navigational, e.g. GPS (Global Positioning System) satellite receiving means and is arranged when interrogated to transmit information indicative of the position of the transponder.

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