In this work, an efficient analysis of radiating structures based on bodies of revolution is dealt with. The procedure is a hybrid method based on a segmentation of the structure into two-dimensional regions, finite elements and a spherical computation domain surrounding the antenna, defining a boundary or port where a spherical mode expansion of the fields is used. A reduced order model is computed for a fast frequency sweep. To validate this method, some structures based on bodies of revolution as a rod dielectric antenna, conical dielectric-loaded horns, profiled horns and a monopole-dielectric resonator antenna are studied and results are compared with those demonstrated by other authors. The design of a smooth-walled horn by means of the optimization of the profile is also carried out.

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A global optimization method for the design of arbitrarily shaped H‐plane passive waveguide devices is presented. An adaptive simulated annealing algorithm (SA) is used to avoid local minima. No information on the initial shape is introduced. A hybrid method based on the segmentation technique, the finite‐element method, and a matrix Lanczos–Padé algorithm (SFELP) adapted to 2D space (2D SFELP) efficiently calculates the wideband response. Technological constraints and mechanical tolerances are taken into account in the design process. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 360–367, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20987

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