Antenna device (1) and method for operating same, comprising an antenna (2), wherein the antenna (2) is connected to an electronic device (4) via an antenna cable (3) and high-frequency signals are transmitted via the antenna cable (3) between the electronic device (4) and the antenna (2) and vice versa, characterized in that the antenna device (1) has a control unit (5) and switch units (6, 7) which are controlled by the control unit (5), wherein the switch units (6, 7) are switched between a receiving path (8) and a transmission path (9) between the electronic device (4) and the antenna (2).