  We demonstrate tunable perfect anomalous reflection with metasurfaces
incorporating lumped elements. The tunable capacitance of each element provides
continuous control over the local surface reactance, allowing for controlling
the evanescent field distribution and efficiently tilting the reflected
wavefront away from the specular direction. The performance of the metasurface
is evaluated for both TE and TM polarization and for reflection to the first
and second diffraction order.
