Method for Managing the Operation of an Object that is Able to Contactlessly Communicate with a Reader

摘要

A method for managing the operation of an object capable of contactless communication with a reader magnetically coupled to the object includes a phase for transmission of information from the object to the reader and includes a modulation of the impedance of a load connected across the terminals of the antenna of the object. Prior to the transmission phase, a monitoring phase includes a monitoring of the level of amplitude modulation of a modulated test signal present at the antenna of the object and resulting from a test modulation of the impedance of the load and a capacitive modification of the impedance of the load if this level is lower than a threshold.

主权项

1. A method for managing the operation of an object capable of contactless communication with a reader magnetically coupled to the object, the method comprising:
performing a monitoring phase that comprises monitoring a level of amplitude modulation of a modulated test signal present at an antenna of the object that results from a test modulation of an impedance of a load connected to terminals of the antenna and a capacitive modification of the impedance of the load when the level is lower than a threshold; and performing a transmission phase that comprises transmitting information from the object to the reader by modulating the impedance of the load connected to the terminals of the antenna of the object.