An electronic entity includes an electronic circuit (21) having at least one first terminal (22) and a second terminal (24) to which an antenna is connected. The antenna includes a conducting element (26) electrically connected to the first terminal (22) of the electronic circuit (21) and includes a resonator (28) insulated from the conducting element (26) at the antenna, electrically connected to the second terminal (24) of the electronic circuit (21) and coupled to the conducting element (26).