A dihedral corner reflector array (DCRA) is an optical system that displays images in the air. It faces a drawback of reduced visibility of the aerial image due to stray light, which is referred to as ...

In this paper, one curved active phase gradient metasurface (PGM) is proposed for enhancement of RCS of a special obtuse dihedral corner, while the other is planar PGM. the active metasurface ...