D'assunção, Adaildo GomesManiçoba, Robson Hebraico Cipriano2014-12-172009-12-032014-12-172009-08-12MANIÇOBA, Robson Hebraico Cipriano. Estudo comparativo de técnicas de cascateamento de superfícies seletivas em frequência. 2009. 73 f. Dissertação (Mestrado em Automação e Sistemas; Engenharia de Computação; Telecomunicações) - Universidade Federal do Rio Grande do Norte, Natal, 2009.https://repositorio.ufrn.br/jspui/handle/123456789/15293This work presents a theoretical and numerical analysis for the cascading of frequency selective surfaces, which uses rectangular patches and triangular Koch fractals as elements. Two cascading techniques are used to determine the transmission and reflection characteristics. Frequency selective surfaces includes a large area of Telecommunications and have been widely used due to its low cost, low weight and ability to integrate with others microwaves circuits. They re especially important in several applications, such as airplane, antennas systems, radomes, rockets, missiles, etc.. FSS applications in high frequency ranges have been investigated, as well as applications of cascading structures or multi-layer, and active FSS. Furthermore, the analyses uses the microwave circuit theory, with the Floquet harmonics, it allows to obtain the expressions of the scattering parameters of each structure and also of the composed structure of two or more FSS. In this work, numeric results are presented for the transmission characteristics. Comparisons are made with experimental results and simulated results using the commercial software Ansoft Designer® v3. Finally, some suggestions are presented for future works on this subjectapplication/pdfAcesso AbertoFSSTécnicas de cascateamentoPatches retangularesFractais de KochHarmônicos de FloquetFSSCascading techniquesRectangular patchesKoch fractalsFloquet harmonicsmasterThesisCNPQ::ENGENHARIAS::ENGENHARIA ELETRICA