Tri-Mode Horn Antenna for Directive 3D-Imaging

Hanno Rabe, Aline Friedrich , Ilona Rolfes

9th European Conference on Synthetic Aperture Radar (EuSAR 2012), pp.348 - 351, Nuremberg, Germany, April 23-26, 2012


A horn antenna fed by three circular waveguide modes is presented enabling directive imaging. The feed excites the E01 and two orthogonal H11 modes with good mode purity within 2 GHz around the center frequency of fc = 25 GHz. The modes are radiated by a linear tapered horn antenna. The fundamental limits of modal beamsteering are analyzed with the focus on level gauging. Imaging enables the localization of parasitic reflectors even within the beamwidth of the fundamental H11 pattern making it a promising candidate for next generation level radars.


tags: antenna;, horn, radar