Patent ID: 7236130

Claim:
An antenna array, for ascertaining vehicle spacing or vehicle speed in a surrounding of a motor vehicle, comprising: a layer construction including at least one dielectric layer at least partly including at least one of a transmitter device, a receiver device, and a transmitter-receiver device and a screening layer; a dipole for the at least one of the transmitter device, the receiver device, and the transmitter-receiver device, the dipole including two separate dipole halves; a patch arranged parallel to the dipole; and signal supply lines arranged parallel to each other to provide a differential input; wherein an orientation of the dipole, the patch and the signal supply lines is such that vectors of electrical fields of the patch and the dipole lie parallel and in a same direction, wherein the signal supply lines of the input are integrated into the layer construction, and wherein the signal supply lines are two signal supply lines made up of a parallel array of two printed or etched lines, and in the layer construction, two symmetrically situated dipole halves are provided in a subdivision, which are each conductingly connected to one of the signal supply lines, respectively, the subdivision spatially restricting the radiation.