A communicating device comprising an antenna, a coupler a first housing for housing the antenna and a second housing for housing the coupler, the antenna comprising: a substrate, a feed point 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 to the first grounding point (GND#1), the loop defining in its center a non-metallic area; the antenna being suitable for operating alone, in a first mode, to radiate a radio signal and a second mode in association with the coupler disposed facing and at a distance from the antenna, the coupler 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 intended to be facing and distant from the coupler in such a way that the coupler picks up the signal radiated by the antenna, 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, 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 and the coupler in such a way as to pick up the signal radiated by the antenna for transferring a radio signal radiated by the antenna to an external antenna suitable for being connected to the coupler. the antenna comprising: a substrate, a feed point 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 to the first grounding point (GND#1), the loop defining in its center a non-metallic area; a substrate, a feed point 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 to the first grounding point (GND#1), the loop defining in its center a non-metallic area; the antenna being suitable for operating alone, in a first mode, to radiate a radio signal and a second mode in association with the coupler disposed facing and at a distance from the antenna, the coupler 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 intended to be facing and distant from the coupler in such a way that the coupler picks up the signal radiated by the antenna, a first operating mode comprising the antenna alone for radiating a radio signal, a second operating mode comprising the antenna and the coupler in such a way as to pick up the signal radiated by the antenna for transferring a radio signal radiated by the antenna to an external antenna suitable for being connected to the coupler.