Hudlička M., Macháč J.: Triple Wire Medium for Use in Isotropic Metamaterials, 37th European Microwave Conference, October 2007, Munchen, Germany, CD-ROM, pp. 628-631.
In this paper a triple wire medium is described as an isotropic negative permittivity medium. A numerical experiment was performed to validate the propagation of electromagnetic waves inside the wire lattice below the plasma frequency, where the effective medium permittivity is negative. For a practical realization, a form of the triple wire medium using a planar technology is proposed.