| 摘要 |
A device for determining the position of a vehicle on a roadway by using radio waves which are emitted from the device and reflected by the vehicle and received by at least two array antennas ( 1, 2 ) arranged across the roadway, wherein the array antennas ( 1, 2 ) comprise a number of antenna elements ( 5-14 ), one of the antenna elements in the respective array antenna constituting the phase center ( 5, 10 ) of the array antennas, and wherein the antenna elements ( 5-14 ) of the array antennas are connected to one another such that the distance (d) between the phase centers ( 5, 10 ) of the array antennas ( 1, 2 ) included is smaller than half the width of an individual array antenna ( 1, 2 ). |
