Abstract
The paper describes the application of scattering pin in aperture of horn-parabolic antenna for beamwidth expansion up to 200 deg. An influence of the scatterer dimensions and its location on the antenna power pattern is studied for E- and H-plane horns. It is shown that the application of cylindrical scatterer provides essentially expansion of antenna beamwidth, which can be used in order to shape antenna patterns for broadband communication systems of "point-to-multipoint" type.