CT - DCO - Departamento de Engenharia de Comunicações
URI Permanente desta comunidadehttps://repositorio.ufrn.br/handle/123456789/29842
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Navegando CT - DCO - Departamento de Engenharia de Comunicações por Assunto "Angular stability"
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Artigo Double layer frequency selective surface for ultra wide band applications with angular stability and polarization independence(Sociedade Brasileira de Microondas e Optoeletrônica, 2019-09) Segundo, Francisco Carlos Gurgel da Silva; Campos, Antonio Luiz Pereira de Siqueira; Gomes Neto, Alfredo; Alencar, Marina de OliveiraIn this paper, a double layer stopband Frequency Selective Surface (FSS) for Ultra-Wide Band (UWB) applications is presented. The proposed FSS consists of two cascaded conventional FSS, one with double square loops and other with square loops. The − 10dB frequency band from 3.00 GHz to 11.64 GHz is achieved, with a fractional bandwidth of 149 %. Effects of angular stability and polarization independence over the frequency response are investigated and conclusions are presented. In order to show transmission performance, the FSS was simulated by ANSYS HFSS. The FSS shows angular stability and polarization independence in entire UWB band (3.10 – 10.60 GHz). A prototype was built and measurements were performed. A good agreement between simulated and measured results was observedArtigo A New multifractal geometry for design of frequency selective surfaces with dual band response(Applied Computational Electromagnetics Society Journal, 2015-07) Braz, Erico Cadineli; Campos, Antonio Luiz Pereira de SiqueiraIn this paper, we proposed a new multifractal geometry for design of frequency selective surfaces (FSS) with dual band response. The proposed new geometry is called Ericampos. The main advantage of the proposed geometry is to design dual band FSS and makes it flexible in terms of controlling resonance and bandwidth. In addition, the proposed structure is easy to implement. The validation of the proposed structure was initially verified through simulations in a commercial software and then the structure was built and experimental results were obtained. A good agreement between numerical and experimental results is observed. The structure shows angular stability and polarization independence