Abstract: A radar system which can be used in a vehicle is presented. The radar system has a radar sensor for transmitting and receiving first radar signals and an evaluation device for processing radar signals received by the radar sensor. The radar system also has at least one active radar tag which is configured to retransmit received radar signals, amplified and modulated, as second radar signals, and the evaluation device is configured to determine information about an object both on the basis of components, received by the radar sensor, of the first radar signals reflected at the object and on the basis of components, received by the radar sensor, of the second radar signals reflected at the object.

Abstract: A radar system which can be used in a vehicle is presented. The radar system has a radar sensor for transmitting and receiving first radar signals and an evaluation device for processing radar signals received by the radar sensor. The radar system also has at least one active radar tag which is configured to retransmit received radar signals, amplified and modulated, as second radar signals, and the evaluation device is configured to determine information about an object both on the basis of components, received by the radar sensor, of the first radar signals reflected at the object and on the basis of components, received by the radar sensor, of the second radar signals reflected at the object.

Abstract: A device for transmitting/receiving electromagnetic HF signals includes the following components: a first, essentially triangular, electrically conductive antenna section for transmitting and/or receiving HF signals; at least one second, third and fourth antenna section which correspond essentially to the first antenna section and form a polygon, in each case a triangular point being provided approximately in the region of the midpoint of the polygon, in whose center an antenna axis is situated; and a carrier device essentially perpendicular to the antenna axis; in each case, the triangular points of the triangular antenna sections, which, starting from the midpoint, form a funnel shape on the side facing away from the carrier device, are connected to HF signal connections of the carrier device in the region of the polygon midpoint; and in each case, two diametrically opposite antenna sections form an antenna element.

Abstract: The device has a printed-circuit board (5), on one side of which at least one antenna (1) is located and, on the other side of which electrical circuits (3) are located. An electromagnetic shield between the antenna (1) and the electrical circuits (3) is realized in a manner that is simple with regard for production engineering by locating a feeder network (13, 15)—developed using a coplanar circuit technique and with which the at least one antenna (1) is contacted—on the antenna-side surface of the printed-circuit board (5), and by covering the antenna-side surface of the printed-circuit board (5) with the connected-to-ground outer conductor (45) of the coplanar circuit to such an extent that the required shield between the antenna (1) and the electrical circuits (3) is produced as a result.

Abstract: A device is proposed for ascertaining distance and transmitting data in a motor vehicle. It has a transmitting arrangement for generating and emitting a radar signal. A receiving arrangement receives a radar signal. It is characterized in that switchover arrangements are provided which cause the transmitting and/or receiving arrangement to operate either in a radar operating mode for detecting the distance and/or speed of a further object, or in a data-exchange operating mode for the exchange of data with a transceiver. Specific functions are enabled in dependence on the data exchange.