Técnicas de algoritmos genéticos aplicadas à otimização do diagrama de radiação de arranjo de antenas

Abstract

Nowadays the search for optimization becomes stronger day by day. Furthermore, genetic algorithms have been widely studied by researchers, since they act as stochastic optimization process which can be applied in many areas, for instance in electromagnetism. A great number of researches have been done to evaluate genetic algorithms in electromagnetic problems, since that kind of problems are very complex and do not present practical analytical solutions. In this work is reviewed the literature about genetic algorithms and the electromagnetic properties of antennas, mainly antenna arrays. It is presented the optimization of the excitation phase angle of each antenna array element and also the amplitude resolution among main and secondary lobes of the antenna array by using genetic algorithms. The study presented in this work describes the implementation of an genetic algorithms and its operators, making possible to implement the antenna array optimization and compare to classical antenna arrays from literature.