Abstract
A hybrid mode matching-integral equation method is presented for the analysis and design of corrugated horns. By applying a particular formulation of the equivalence principle, which implies covering the horn aperture with a metallic plate, the original issue is divided into an exterior and an interior problem. The former is formulated by using a combined field integral equation, the latter by employing a modal expansion. The separation of the two problems allows running an optimization procedure to meet all the requirements needed in high performance radiating systems. The technique has been used for the design of a small flare angle and a discrete-section profiled horn. The theoretical predictions remarkably agree with experimental data.
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