Transformación de campo cercano a campo lejano utilizando corrientes equivalentes y algoritmos genéticos

Abstract

A method for computing far-field antenna patterns from planar near-field samples is presented. The method, based on the equivalence principle, replaces the antenna under test by a set of equivalent magnetic currents (EMC), and a binary micro genetic algorithm is used to optimise the amplitudes of the EMC from the near-field data. A second approach, using an equivalent model for the source made up of electric short dipoles, is also analysed. From the optimised equivalent model, the antenna far-field pattern can be easily computed. Numerical results using synthetic near-field data are reported and discussed.