Abstract: A new method for the analysis of horn antennas is presented. The method is based on determination of the approximate current distribution over the antenna walls. The electric field integral equation for current distribution is solved using the EDG method (Entire-Domain Galerkin method), which represents a very efficient variant of the MoM (Method of Moments). The proposed method enables that real structure, including the feed, can be analyzed. As a result the radiation pattern can be precisely calculated in all directions, which is not the case with other known methods. Presented numerical and measured results show very good agreement, thus illustrating the great possibilities of the proposed method in the analysis of such antennas.
Keywords: Horn antenna, entire domain Galerkin methods, metods of moments, radiatin pattrn.