Tag

G - Physics – 06 – K

Patent

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Details

G06K 19/077 (2006.01) G06K 19/07 (2006.01)

Patent

CA 2233971

Known tags which are capable of receiving and demodulating signals by way of one and the same antenna and by way of one and the same diode, as well as being capable of modulating and transmitting signals, often have a poor efficiency, particularly if the antenna is implemented in the form of a fiat plate. By coupling a high-ohm first terminal of the antenna to the diode, and coupling a low-ohm second terminal to earth by way of an inductive element, there is obtained a tag which has a good efficiency, both regarding the reception and demodulation of signals and regarding the modulation and transmission of signals.

Les étiquettes connues jusqu'à maintenant, qui peuvent d'une part, recevoir et démoduler des signaux au moyen d'une seule et même antenne et au moyen d'une seule et même diode et, d'autre part, moduler et émettre des signaux, sont souvent peu efficaces, notamment si l'antenne se présente sous la forme d'une plaque plate. En couplant une première borne, à forte résistance ohmique, de l'antenne avec la diode, et en couplant une seconde borne, à faible résistance ohmique, avec la terre au moyen d'un élément inductif, on obtient une étiquette présentant une bonne efficacité, à la fois quant à la réception et à la démodulation de signaux, et quant à la modulation et émission de signaux.

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