  We study various mechanisms of electron transmission across the corrugations
in the graphene sheet. The spin dependence of the electron transmission
probability in the rippled graphene is found. The electrons mean free path and
transmission probabilities are analysed for different distributions of ripples
in the graphene sheet as well. We demonstrate that the periodically repeated
rippled graphene structure (the superlattice) leads to the suppression of the
transmission of the ballistic electrons with one spin orientation in contrast
to the other, depending on the direction of the incoming electron flow.
