A communicating device comprising an antenna (A), a coupler (C) a first housing for housing the antenna and a second housing for housing the coupler (C), the antenna (A) comprising: a substrate , a feed point (E) of the antenna and a first grounding point (GND#1) intended to be connected to a ground plane; a metallic antenna element pattern printed on one side of the substrate, the antenna element pattern forming an open loop from the feed point (E) to the first grounding point (GND#1), the loop defining in its center a non-metallic area ; the antenna (A) being suitable for operating alone, in a first mode, to radiate a radio signal and a second mode in association with the coupler (C) disposed facing and at a distance from the antenna (A), the coupler (C) comprising a rectangular substrate comprising a coupling pattern printed on one side, the coupling pattern comprising a metallic area complementary to the non-metallic area of the antenna (A) intended to be facing and distant from the coupler (C) in such a way that the coupler (C) picks up the signal radiated by the antenna (A), the first housing and the second housing being configured with respect to one another in such a way that the antenna and the coupler can face one another, the metallic area of the coupler then facing the non-metallic area of the antenna (A), the device comprising two operating modes: a first operating mode comprising the antenna alone for radiating a radio signal, a second operating mode comprising the antenna (A) and the coupler (C) in such a way as to pick up the signal radiated by the antenna (A) for transferring a radio signal radiated by the antenna (A) to an external antenna suitable for being connected to the coupler (C). the antenna (A) comprising: a substrate , a feed point (E) of the antenna and a first grounding point (GND#1) intended to be connected to a ground plane; a metallic antenna element pattern printed on one side of the substrate, the antenna element pattern forming an open loop from the feed point (E) to the first grounding point (GND#1), the loop defining in its center a non-metallic area ; a substrate , a feed point (E) of the antenna and a first grounding point (GND#1) intended to be connected to a ground plane; a metallic antenna element pattern printed on one side of the substrate, the antenna element pattern forming an open loop from the feed point (E) to the first grounding point (GND#1), the loop defining in its center a non-metallic area ; the antenna (A) being suitable for operating alone, in a first mode, to radiate a radio signal and a second mode in association with the coupler (C) disposed facing and at a distance from the antenna (A), the coupler (C) comprising a rectangular substrate comprising a coupling pattern printed on one side, the coupling pattern comprising a metallic area complementary to the non-metallic area of the antenna (A) intended to be facing and distant from the coupler (C) in such a way that the coupler (C) picks up the signal radiated by the antenna (A), a first operating mode comprising the antenna alone for radiating a radio signal, a second operating mode comprising the antenna (A) and the coupler (C) in such a way as to pick up the signal radiated by the antenna (A) for transferring a radio signal radiated by the antenna (A) to an external antenna suitable for being connected to the coupler (C). <EOS>