  A layer of uniaxial medium with large axial permittivity and permeability can
be used as a quarter-wave transformer with interesting properties. By
increasing the transverse permittivity and permeability the transformer becomes
a thin sheet. It is shown that the recently introduced SHDB boundary
conditions, generalizing the soft-and-hard and DB conditions, realized by the
interface of a skewon-axion medium, can be transformed to form a novel class of
SHD'B' boundary conditions which generalizes the soft-and-hard and D'B'
boundary conditions. Reflection of a plane wave from a planar SHD'B' boundary
is considered by numerical examples revealing an interesting narrow beam with
radical change of reflection for certain values of parameters and incidence
angles.
