  We propose a universal strategy to realize a broadband control on arbitrary
scatterers, through multiple coherent beams. By engineering the phases and
amplitudes of incident beams, one can suppress the dominant scattering partial
waves, making the obstacle lose its intrinsic responses in a broadband
spectrum. The associated coherent beams generate a finite and static region,
inside which the corresponding electric field intensity and Poynting vector
vanish. As a solution to go beyond the sum-rule limit, our methodology is also
irrespective of inherent system properties, as well as extrinsic operating
wavelength, providing a non-invasive control on the wave-obstacles interaction
for any kinds of shape.
