A communication cable includes one or more conductive elements surrounded by a dielectric sheath. The sheath member has a first dielectric constant value. A dielectric core member is placed longitudinally adjacent to and in contact with an outer surface of the sheath member. The core member has a second dielectric constant value that is higher than the first dielectric constant value. A cladding surrounds the sheath member and the dielectric core member. The cladding has a third dielectric constant value that is lower than the second dielectric constant value. A dielectric wave guide is formed by the dielectric core member surrounded by the sheath and the cladding.