Abstract text

The invention relates to a radio-frequency communication device comprising an inductive antenna in order to communicate with a transponder. According to the invention, the antenna is capable of establishing weak coupling with a transmitter which produces a magnetic field which is substantially homogeneous on the scale of the antenna and is also capable of establishing strong inductive coupling with a transponder located in the vicinity of the device, with the device comprising a transponder interrogation circuit comprising means of sampling and processing the signal on the antenna terminals which are capable of producing a reference signal as a function of said signal; modulation means capable of modulating the reference signal; and application means capable of applying the modulated signal to the antenna terminals.