  The propagation of microwaves across a turbulent plasma density layer is
investigated with full-wave simulations. To properly represent a fusion
edge-plasma, drift-wave turbulence is considered based on the Hasegawa-Wakatani
model. Scattering and broadening of a microwave beam whose amplitude
distribution is of Gaussian shape is studied in detail as a function of certain
turbulence properties. Parameters leading to the strongest deterioration of the
microwave beam are identified and implications for existing experiments are
given.
