  We propose and investigate a new type of metamaterial structure composing of
several interpenetrating wire meshes. Calculated band structures show that they
exhibit index ellipsoids locating at nonzero k-point in long wavelength limit.
We can comprehend these quasistatic modes by Poison's equation and find these
modes do not rely on the detailed geometry of the wires but the connectivities
of the wires. We can engineer the locations of index ellipsoid by designing the
connectivities of the wire meshes.
