Abstract: The device has a transmitting and receiving device for electromagnetic radiation which is arranged in the region of a bumper and includes an RF circuit arranged on a support plate and at least two substantially planar antennas that interact with the RF circuit. The antennas are fixed on a plastic sheet. A printed circuit board has perforations for the passage of radiation from the RF circuit to the antennas. Spacers having a precise longitudinal extent are inserted into the perforations, and the plastic sheet is bonded onto the underside of the printed circuit board such that the antennas each bear on a spacer.