  Mechanically reconfigurable reflectors can modify their geometries to realize
large angle beam scanning. This paper studies a method for reconfiguring a
reflector geometry from a standard parabolic shape to offset parabolic shapes
with varies offset angles. To fulfil the geometry control, the coordinate
change of the nodes on the reflector surface are studied with the coordinate
transformation method. To accommodate the large deformation of the reflector
surface, a negative Poisson's ratio (NPR) material is applied to the
reconfigurable reflector.
