D'assunção, Adaildo GomesCruz, Rossana Moreno Santa2014-12-172007-02-122014-12-172005-08-15CRUZ, Rossana Moreno Santa. Análise do espalhamento espectral em superfícies de estruturas complexas para comunicações móveis. 2005. 157 f. Dissertação (Mestrado em Automação e Sistemas; Engenharia de Computação; Telecomunicações) - Universidade Federal do Rio Grande do Norte, Natal, 2005.https://repositorio.ufrn.br/jspui/handle/123456789/15406In this work, the transmission line method is explored on the study of the propagation phenomenon in nonhomogeneous walls with finite thickness. It is evaluated the efficiency and applicability of the method, considering materials like gypsum, wood and brick, found in the composition of the structures of walls in question. The results obtained in this work are compared to those available in the literature, for several particular cases. A good agreement is observed, showing that the performed analysis is accurate and efficient in modeling, for instance, the wave propagation through building walls and integrated circuit layers in mobile communication and radar system applications. Later, simulations of resistive sheets devices such as Salisbury screens and Jaumann absorbers and of transmission lines made of metal-insulator-semiconductor (MIS) are made. Thereafter, it is described a study on frequency surface selective structures (FSS). It is proposed the development of devices and microwave integrated circuits (MIC) of such structures, for the accomplishment of experiments. Finally, future works are suggested, for instance, on the development of reflectarrays, frequency selective surfaces with dissimilar elements, and coupled frequency selective surfaces with elements located on different layersapplication/pdfAcesso AbertoPropagaçãoEstruturas de MulticamadasMétodo da Linha de TransmissãoCoeficientes de ReflexãoPropagationMultilayer StructuresTransmission Line MethodReflection CoefficientsmasterThesisCNPQ::ENGENHARIAS::ENGENHARIA ELETRICA