EVALUATION OF THE COUPLING FACTOR OF AN ELECTROMAGNETIC TRANSPONDER BY CAPACITIVE DETUNING
First Claim
1. A method for evaluating the current coupling factor between an electromagnetic transponder and a terminal, wherein a ratio between data representative of a voltage across an oscillating circuit of the transponder and obtained for two capacitance values of the oscillating circuit, is compared with one or several thresholds.
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Accused Products
Abstract
A method for evaluating the current coupling factor between an electromagnetic transponder and a terminal, and a transponder implementing this method, wherein a ratio between data representative of a voltage across an oscillating circuit of the transponder and obtained for two capacitance values of the oscillating circuit is compared with one or several thresholds.
8 Citations
7 Claims
- 1. A method for evaluating the current coupling factor between an electromagnetic transponder and a terminal, wherein a ratio between data representative of a voltage across an oscillating circuit of the transponder and obtained for two capacitance values of the oscillating circuit, is compared with one or several thresholds.
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