A metal wire waveguide for terabit DSL

We investigate the propagation of terahertz radiation on a complex multi-element metal wire waveguide ensheathed in a metal jacket. Mode mixing due to bends and nonuniformities along the waveguide axis result in a nearly random mode pattern at the output. This stochastic mixing is ideal for a vectored transmission, analogous to the multiple-input, multiple-output (MIMO) concept commonly used in wireless networking, and could enable terabit-per-second data rates on the existing cables already in use by DSL systems.