| 摘要 |
The invention provides an antenna arrangement for a radar system arranged for coverage of a surveillance area and comprising antenna elements. The antenna elements are arranged to receive a signal transmitted from a transmit antenna of a transmit antenna arrangement and reflected by a target towards the antenna arrangement wherein: • the antenna arrangement comprises at least two non-parallel line arrays, • each antenna element being connected to a receiver where each line array is arranged to create, by using digital beam forming, beams for instantaneous coverage of at least said surveillance area and • within the surveillance area said line arrays are arranged to allow the target position to be limited to one or two crossing areas between at least two beams from different line arrays from which target reflections have been received. The invention also provides a corresponding method and a radar system comprising the antenna arrangement. |
