A type of antenna which typically employs a bent piece of sheet metal to serve as the reflector element.
A dihedral (two-sided) corner reflector is formed by two intersecting flat surfaces perpendicular to each other. Radar energy striking one of these surfaces is reflected back to the antenna via the other surface. Frequently used on control points in radar surveys.
A corner reflector is a retroreflector consisting of three mutually perpendicular, intersecting flat surfaces, which reflects electromagnetic waves back towards the source. The three intersecting surfaces often have square shapes. This is also known as a corner cube.