Abstract: Described is an antenna assembly for a radar system for a vehicle having four type-1 antenna elements of a first antenna element type (transmission elements), and at least two type-2 antenna elements of a second antenna element type (receiving elements). The type-1 antenna elements are arranged on a plane on the corners of an imaginary flat rectangle, where two of the sides of the rectangle extend parallel to an imaginary first assembly axis and form type-1 antenna element main axes. The two other sides of the rectangle extend parallel to an imaginary second assembly axis, perpendicular to the first assembly axis, and form type-1 antenna element transverse axes. Two of the type-2 antenna elements are arranged on different imaginary type-2 antenna element main axes which extend parallel to each other in a mutually spaced manner and parallel to one of the assembly axes.

Abstract: Described is an antenna assembly for a radar system and a method for operating a radar system. The antenna assembly has four type-1 antenna elements of a first antenna element type and at least three type-2 antenna elements of a second antenna element type. The type-1 antenna elements are arranged on a plane on the corners of an imaginary flat rectangle, where two of the sides of the rectangle extend parallel to an imaginary first assembly axis along type-1 antenna element main axes. The two other sides of the rectangle extend parallel to an imaginary second assembly axis, which runs perpendicularly to the first assembly axis, along type-1 antenna element transverse axes. At least three of the type-2 antenna elements are arranged on different imaginary type-2 antenna element main axes which extend parallel to each other in a mutually spaced manner and parallel to one of the assembly axes.

Abstract: Described is an antenna device for a radar device and a method for operating a radar device. The antenna device has a type-1 antenna element of a first antenna element type and a type-2 antenna element of a second antenna element type. One of the antenna element types is a transmit antenna element type and the other of the antenna element types is a receive antenna element type. The antenna device has two antenna arrangements that are of identical design. The positions of the antenna elements of an antenna arrangement within the antenna device result from a geometric transformation of the positions of the corresponding antenna elements of the other antenna arrangement. The geometric transformation includes a rotation of the positions of the antenna elements of the other antenna arrangement about an imaginary directional axis thereof. The imaginary directional axis indicates the direction in which the antenna arrangement is directed.