H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
H01Q 1/22 (2006.01) H01Q 1/38 (2006.01) H01Q 7/00 (2006.01) H01Q 9/27 (2006.01)
Patent
CA 2392769
The invention concerns an antenna for transmission and/or reception of electromagnetic waves (10) comprising a wire arranged in a coil in a plane, said coil comprising at least two turns; the antenna is characterised in that it comprises at least a cutoff (12) in order to reduce the capacitance between the turns. Such an antenna is used in a non-contact communication system wherein a reader transmits electromagnetic signals to a portable object (card or ticket) so as to be able to identify the owner of the portable object when the latter transmits back identification signals to said reader.
Antenne d'émission et/ou de réception d'ondes électromagnétiques (10) du type comprenant un fil disposé en spirale dans un plan, ladite spirale comportant au moins deux spires; l'antenne étant caractérisée en ce qu'elle comprend au moins une coupure (12) dans le but de diminuer la capacité inter-spires. Une telle antenne est utilisée dans un système de communication sans contact dans lequel un lecteur transmet des signaux électromagnétiques à un objet portable (carte ou ticket) de manière à pouvoir identifier le possesseur de l'objet portable lorsque ce dernier transmet en retour des signaux d'identification vers ledit lecteur.
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