Analysis of an array of waveguides with semitransparent walls for shaping flat-topped element patterns

A 2D problem of radiation from an infinite array of waveguides with semitransparent wall sections excited in the TE10 modes is considered. The semitransparent walls are taken in the form of grids consisting of cylindrical conductors. The analysis of the structure is based on the mode-matching method combined with the method of auxiliary sources. Some numerical results characterised both the algorithm proposed and the possibilities of the structure in shaping the flat-topped element patterns are presented, compared to available data, and discussed.