Antenna feed with two orthogonal circular polarizations

 

D. A. Demin, N. P. Chubinsky

Moscow Institute of Physics and Technology (State University)

 

The paper is received on June 3, 2014

 

Abstract.  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.