H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/59 (2006.01) G06K 19/07 (2006.01)
Patent
CA 2245005
A transponder adapted to be used in a checkout or inventory control system is disclosed which transmits by modulating and re-radiating a transponder signal frequency derived from a carrier frequency received on a transmitting antenna. The transponder includes a dual mode antenna and circuitry which selectively operates the antenna to suppress undesired emission of the transponder signal frequency when the transponder is not transmitting. A terminating circuit is further disclosed which suppresses undesired emission of the transponder signal frequency by a demodulator portion of the transponder.
Transpondeur adapté pour un système de commande de vérification ou de contrôle des stocks, transmettant par modulation et rerayonnement une fréquence de signal de transpondeur obtenue à partir d'une porteuse reçue sur une antenne émettrice. Le transpondeur comprend une antenne bimode et un circuit qui commande sélectivement l'antenne de façon à supprimer l'émission non désirée de la fréquence du signal de transpondeur lorsque le transpondeur n'émet pas. Un circuit de terminaison permet de supprimer l'émission non désirée de la fréquence de signal de transpondeur au moyen d'une partie démodulatrice du transpondeur.
Asgari Mohammad A.
Palmer John P.
Kipp Ludwig
Osler Hoskin & Harcourt Llp
LandOfFree
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