According to some embodiments, a waveguide cable includes a dielectric core and a conducting layer surrounding the dielectric core. A first antenna may be provided at a first end of the waveguide cable to receive a digital signal and to propagate an electromagnetic wave through the dielectric core. A...http://www.google.de/patents/US20070001789?utm_source=gb-gplus-sharePatent US20070001789 - Waveguide cable
