  We investigate the radiation properties of two types of elementary sources
embedded in a uniaxial wire medium: a short dipole parallel to the wires and a
lumped voltage source connected across a gap in a generic metallic wire. It is
demonstrated that the radiation pattern of these elementary sources have quite
anomalous and unusual properties. Specifically, the radiation pattern of a
short vertical dipole resembles that of an isotropic radiator close to the
effective plasma frequency of the wire medium, whereas the radiation from the
lumped voltage generator is characterized by an infinite directivity and a
non-diffractive far-field distribution.
