Analysis of scattering from tapered and non-circular cross section struts for reflector antennas

A numerical technique used to calculate scattered fields from feed/subreflector support struts for reflector antenna system has been described in this presentation. Comparison between calculated and measured patterns, with and without the struts, indicates that the technique implemented is valid in predicting scattered fields from struts with arbitrary cross section. The numerical results presented also show that non-circular cross section struts, such as ogival ones, can provide lower scattered field levels that can be very important for reflectors with low sidelobe requirements.