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This article describes a novel structure that is reconfigured via switches. The switch-reconfigurable antenna is first optimized by means of a genetic algorithm (GA), coupled to a MoM-based EM. After selection of the optimal shape (including switch positions), the optimal switch set states are obtained by exhaustive search. Optimization via GA have received widespread attention recently and have been...
In this paper, we showed a kind of multi-resolution (MR) basis for the analysis via the method of moments (MoM) of a generic conductor discretized with triangular cells. The proposed basis is derived from the classical Rao-Wilton-Glisson (RWG) basis (S.M. Rao et al., 1982): so we called the new basis functions "multi-resolution Rao-Wilton-Glisson" (MR-RWG) functions
For the MoM analysis of complex printed periodic structures, the use of sub-domain basis functions is essential. In this work, triangular mesh and Rao-Wilton-Glisson (RWG) functions are assumed. The aim of this work is to propose a hybridization of the standard spectral- and spatial-domain MoM approaches, through a convenient manipulation of the periodic Green's function (PGF)
This communication proposes the integration of the MAGMAS code with the multi-resolution (MR) approach described in F. Vipiana et al. (2005); the latter can be viewed, inter alia, as a powerful pre-conditioner. The MR scheme essentially consists in the generation and use of vector basis functions, applicable to the analysis of planar and/or 3D antennas, having properties similar to those of scalar...
In this paper, a conformal 4times8 array antenna for a mobile communication base station is analyzed using the synthetic function expansion technique, a numerical approach previously introduced by the authors. While the numerical aspects of the problem were discussed in a previous paper, here the practical aspects like construction and measurements for a first prototype with a single polarization...
This work is concerned with the design of "contoured-beam" antennas (also known as "shaped-beam" antennas) as used in satellite communication systems, i.e. antennas having the main beam shaped so that its footprint on ground closely follows the contour of specific geographical regions (e.g. Europe or the U.S.), with the objective of maximizing the radiation efficiency and reducing...
This paper presents a procedure to reduce the computational effort for the full-wave analysis of corrugated or stepped rectangular horns/cavities, open-ended on an infinite ground plane. This procedure, framed in the method of moments (MoM), is based on the construction of appropriate basis functions generated by solving the problem of one element in isolation. These functions are termed "synthetic...
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