H - Electricity – 03 – H
Patent
H - Electricity
03
H
H03H 7/38 (2006.01)
Patent
CA 2372609
A radio frequency transponder assembly comprises a passive transponder and an antenna with a matching circuit comprising an inductor and a capacitor which are formed integrally with the antenna components. For example, the antenna can be a dipole with legs formed from wire or foil strips, in which case the inductor and capacitor are formed from the same material as the antenna legs. The values of the inductor and capacitor are calculated to match the antenna impedance to the equivalent load of the transponder circuit as seen via the power rectification circuits of the transponder.
L'invention concerne un ensemble transpondeur à radiofréquences, qui se compose d'un transpondeur passif et d'une antenne dotée d'un circuit d'adaptation comprenant une bobine d'inductance et un condensateur intégrés aux composants de l'antenne. L'antenne peut être par exemple un dipôle comprenant des éléments formés de câbles ou de rubans métalliques, la bobine d'induction et le condensateur étant alors formés des mêmes matériaux que les éléments d'antenne. Les valeurs de la bobine d'inductance et du condensateur sont calculées de manière que l'impédance de l'antenne corresponde à la charge équivalente du circuit transpondeur au niveau des circuits redresseurs de puissance du transpondeur.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Trolley Scan (pty) Limited
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