Abstract: An autonomous electronic system includes two input terminals that are connected to an external electrical energy source, a converter circuit comprising at least one inductive element and connected to the terminals in order to receive energy from the source, a means for storing the energy delivered by the converter circuit, an electronic processing circuit performing a predefined function and delivering a data signal after performing the function, an emission circuit connected to an antenna in order to transmit the data signal to a remote receiver, and a control circuit able to control the circuits supplied with power by virtue of the energy source, the system being wherein the converter circuit and the antenna comprise at least one common inductive element and in that it comprises a link device situated between the emission circuit and the at least one common inductive element so as to transmit the signal emitted by the antenna formed at least partly by the at least one common inductive element.