REFLECTOR ANTENNA FOR A SYNTHETIC APERTURE RADAR

摘要

The invention relates to a reflector antenna for a synthetic aperture radar, having a reflector (20) which comprises a reflector surface (22), a vertex (26), and an optical axis (24) extending outwards therefrom. The reflector antenna also has a plurality of antenna elements (18) arranged side by side and in a row, for transmitting radar transmission signals and receiving radar reception signals produced from a reflection on a surface (14). The reflector (20) is designed as a one-dimensional defocused reflector (20) having two focal planes (40, 42). The optical axis (24) coincides with the line of inter-section (28) of two imaginary planes extending at right angles to one another, specifically a first (X-) plane (30) and a second (Y-) plane (32). The reflector (20) has, in the first (X-) plane (30), a first (X-) focal plane that extends at right angles thereto and to the optical axis (24), and, in the second (Y-) plane (32), a second (Y-) focal plane (42) which extends at right angles thereto and to the optical axis. The second (Y-) focal plane (42) is at a greater distance from the vertex than the first (X-) focal plane (40). When viewing the first (X-) plane (30) of the reflector (20), the antenna elements (18) are arranged side by side along an (X-) line (34) which extends in the first (X-) plane (30) at the height of the second (Y-) focal plane (42).

主权项

1. A reflector antenna for a synthetic aperture radar, said reflector antenna comprising
a reflector having a reflector surface, a vertex, and an optical axis extending outwards therefrom, and a plurality of antenna elements arranged side by side and in a row, for transmitting radar transmission signals and for receiving radar reception signals generated by reflection on a surface,wherein
the reflector is designed as a one-dimensionally defocused reflector having two focal planes, the optical axis coincides with the intersection line of two imaginary planes extending at right angles to one another, specifically a first (X-) plane and a second (Y-) plane, the reflector has, in the first (X-) plane, a first (X-) focal plane that extends at right angles thereto and to the optical axis, the reflector has, in the second (Y-) plane, a second (Y-) focal plane which extends at right angles thereto and to the optical axis, the second (Y-) focal plane is at a greater distance from the vertex than the first (X-) focal plane, and when viewing the first (X-) plane of the reflector, the antenna elements are arranged side by side along an (X-) line extending in the first (X-) plane, said (X-) line extending at the height of the second (Y-) focal plane.