Warning system to signal the presence of radiofrequency communication and manufacturing method

摘要

The system (5) has an indicator i.e. tubular electromagnetic vibrator (6), perceptible by a user, and activation units constituted by a supply coil (8) and an adaptation circuit (9). The activation units capture or detect energy provoking from a radio-frequency communication to activate the vibrator. The vibrator includes a mobile core in a tube and excitation coils connected to the adaptation circuit, where the circuit is connected to the supply coil. The vibrator includes plane excitation coils placed at ends of the tube. Independent claims are also included for the following: (1) a communication device comprising an aerial (2) a method for manufacturing a communication device comprising a warning system.