Abstract: A wide-angle reflector antenna that substantially eliminates pattern blockage is provided. The reflector antenna includes a paraconic reflector and a feed supportably located in opposed relation to the reflector surface. A curved reflecting surface of the reflector is formed by symmetrically rotating a curve around a longitudinal center axis, wherein the curve also defines an apex on the longitudinal center axis. The curve's focal point may be located on the longitudinal center axis or laterally displaced therefrom.

Abstract: The present invention provides a matched mode antenna feedline desiged to achieve simultaneous modal impedance matching with a multiple mode N-fold symmetric or N-fold polygonal antenna such as, for example, spiral antennas, sinuous antennas, modulated arm width (MAW) spiral antennas, log periodic dipole (LPDA), monopole (LPMA) arrays, and an N-fold polygonal antenna. In one embodiment, the matched mode antenna feedline (10) includes a plurality of transmission lines (20) arranged in a circular cluster around a central axis (12). Each transmission line (20) extends from an input end (22) thereof connectable with a device such as a beamformer to an output end (24) thereof connectable with an antenna feedpoint. A transition section (30) is provided between the input and output ends (22, 24) of each transmission line (20) wherein the transmission lines (20) are smoothly transitioned from a decoupled state proximal to the input ends (22) thereof to a coupled state proximal to the output ends (24) thereof.