The paper is received on June 3, 2014
In this article, a circular polarized feed antenna for a prime focus parabolic
reflector is numerically modeled and experimentally investigated. A remarkable
feed antenna feature is a stepped septum inside single-mode waveguide used as combined
orthomode transducer and polarizer. The septum polarizer enabled us to make a
simple yet compact feed antenna. High isolation between input and output ports is
achieved (less than ).
Keywords: feed antenna, orthomode transducer, septum polarizer.