  Reconfigurable intelligent surfaces can be successfully used to control the
radio environment. Simple control of the reflection angle of the signal from
the surface allows maximization or minimization of the received power in
specific places. The paper presents simulations where it is possible to receive
a signal in a place where it was not possible, to detect the occupancy of the
spectrum in a place where the sensor was unable to make correct detection or to
minimize interference in a specific receiver.
