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Electromagnetic properties of artificial media formed by lattices of thin conducting straight wires (referred to as wire media, WM) are discussed. Wire media can be described in terms of effective permittivity, which is negative at low frequencies that gives background to call it as "artificial plasma". Strong spatial dispersion is inherent in WM and it determines their main properties....
A novel microstructure with two sets of Omega -shaped conductive elements is suggested. The material is modelled by uniaxial bianisotropic constitutive relations. With specific material parameter values, a lossy layer can serve as a nonreflecting shield. If losses are small, the material is suited for low-reflection antenna radomes.<<ETX>>
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