  The restrictions on the resolution of transmission devices formed by wire
media (arrays of conductive cylinders) recently proposed in [Phys. Rev. B, 71,
193105 (2005)] and experimentally tested in [Phys. Rev. B, 73, 033108 (2006)]
are studied in this paper using both analytical and numerical modeling. It is
demonstrated that such transmission devices have sub-wavelength resolution that
can in principle be made as fine as required by a specific application by
controlling the lattice constant of the wire medium. This confirms that slabs
of the wire medium are unique imaging devices at the microwave frequency range,
and are capable of transmitting distributions of TM-polarized electric fields
with nearly unlimited sub-wavelength resolution to practically arbitrary
distances.

Optics