US Patent 10230426 Antenna structure with circularly polarized antenna beam

In accordance with one or more embodiments, a communication device includes a dielectric antenna having a feed point and an aperture. A cable comprising a conductorless core is coupled to the feed point of the dielectric antenna. A transmitter is coupled to the cable and facilitates a transmission of first electromagnetic waves to the feed point of the dielectric antenna. The first electromagnetic waves are guided by the conductorless core and propagate along the conductorless core without requiring an electrical return path, and the first electromagnetic waves generate free-space wireless signals from the aperture of the antenna in accordance with a circularly polarized antenna beam pattern.