GHz is presented. The link is based on fully integrated millimeter wave circuits (MMICs) and
promises data rates up to 40Gbit/s over a distance of one kilometer. A demonstrator working
at a carrier frequency of 220 GHz serves as a proof-of-concept. Measurements with this
demonstrator show data rates up to 25 Gbit/s for a coherent receiving scheme over a
distance of 60 cm as well as a bit error rate of 5× 10-4 at 25Gbit/s.