D'assunção, Adaildo GomesAlmeida Filho, Valdez Aragão de2014-12-172010-09-242014-12-172010-06-14ALMEIDA FILHO, Valdez Aragão de. Arranjos Log-Periódicos Compactos em Microfita com Elementos Fractais de Koch. 2010. 100 f. Dissertação (Mestrado em Automação e Sistemas; Engenharia de Computação; Telecomunicações) - Universidade Federal do Rio Grande do Norte, Natal, 2010.https://repositorio.ufrn.br/jspui/handle/123456789/15315This work aims to present how the application of fractal geometry to the elements of a log-periodic array can become a good alternative when one wants to reduce the size of the array. Two types of log-periodic arrays were proposed: one with fed by microstrip line and other fed by electromagnetic coupling. To the elements of these arrays were applied fractal Koch contours, at two levels. In order to validate the results obtained some prototypes were built, which were measured on a vector network analyzer and simulated in a software, for comparison. The results presented reductions of 60% in the total area of the arrays, for both types. By analyzing the graphs of return loss, it was observed that the application of fractal contours made different resonant frequencies appear in the arrays. Furthermore, a good agreement was observed between simulated and measured results. The array with feeding by electromagnetic coupling presented, after application of fractal contours, radiation pattern with more smooth forms than the array with feeding by microstrip lineapplication/pdfAcesso AbertoAntenas de MicrofitaGeometria FractalArranjos de AntenasRedução de DimensõesMicrostrip AntennasFractal GeometryAntennas ArrayDimensions ReductionmasterThesisCNPQ::ENGENHARIAS::ENGENHARIA ELETRICA