Newton A.S. Gomes
Instituto Tecnológico de Aeronáutica
Bistatic radarRadar cross-sectionEnergy harvestingComposite numberMatrix (chemical analysis)Terahertz radiationAnalytical chemistryMass fractionPermeability (electromagnetism)PhysicsDielectricL bandFabricationAerospace engineeringBuckypaperComposite materialCalibrationEpoxyPermittivityGlass fiberPlastic-clad silica fiberAttenuationElectromagnetic interferenceCompression moldingScatteringMaterials scienceOptical fiberNitrideCurvatureAspect ratio (image)Electrical conductorCylinderPlastic optical fiberRange (aeronautics)DiffractionInsulator (electricity)Electromagnetic shieldingScanning electron microscopeMetal-insulator-metalCarbonyl ironLaminationPolyanilineNanotubeNano-Characterization (materials science)Absorption capacityAll-silica fiberFerrite (magnet)Microelectromechanical systemsComputer scienceChemical engineeringCarbon blackMicrowaveMolding (process)OptoelectronicsHard-clad silica optical fiberAluminiumCarbon nanotubePolymerMetalSiliconRadarCrackingAbsorption (electromagnetic radiation)DiodeNanofiberDetectorDissipation factor
17Publications
3H-index
27Citations
Publications 16
Newest
#1Péricles Lopes SantAna (ITA: Instituto Tecnológico de Aeronáutica)
#2Argemiro Soares da Silva Sobrinho (ITA: Instituto Tecnológico de Aeronáutica)H-Index: 6
Last. Newton A.S. Gomes (ITA: Instituto Tecnológico de Aeronáutica)H-Index: 3
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#1Bruno Ribeiro (UNIFESP: Federal University of São Paulo)H-Index: 7
#2Jefersson Alexander Rojas Corredor (UNIFESP: Federal University of São Paulo)H-Index: 2
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 34
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Glass fiber/epoxy-reinforced multi-walled carbon nanotube buckypaper composites (GF/EP/BP) were fabricated by hot compression molding process to evaluate its electromagnetic interference (EMI) shielding efficiency (SE) in the X-band (8.2–12.4 GHz) frequency range. Scanning electron microscopy (SEM) revealed a porous structure for the CNT film and good overall quality of the GF/EP/BP composite with no apparent voids or defects associated to the lamination process. The electrical conductivity of t...
1 CitationsSource
#2Newton A.S. Gomes (ITA: Instituto Tecnológico de Aeronáutica)H-Index: 3
The purpose of the paper is to analyze the A-4 Skyhawk aircraft stealth capacity as a function of its radar cross section (RCS) against an L-band monostatic radar (1 to 2 GHz). The article proposes a trajectory to a certain probability of detection, a statistical variable, by reaching a 81.3% reduction of the theoretical radar range. This methodology evaluates the effect of dynamic target detection when the aircraft performs several flight paths towards a radar site region, looking for an altitu...
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#1Daniel Consoli Silveira (UNESP: Sao Paulo State University)H-Index: 1
#2Newton A.S. GomesH-Index: 3
Last. Edson Cocchieri Botelho (UNESP: Sao Paulo State University)H-Index: 26
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Radar absorbing structures (RAS) based on frequency selective surface (FSS) can be prepared to meet tailored properties in reducing electromagnetic interference in the microwave range, in addition to presenting mechanical properties suitable for structural applications. This article presents a study involving RAS processed by appropriate lamination and molding of glass fiber/epoxy resin prepreg and nonwoven of carbon fiber recovered with nickel and containing patterned unit cells to evaluate the...
1 CitationsSource
#1Simone de Souza Pinto (Metropolitan University)H-Index: 5
#1Simone de Souza Pinto (Metropolitan University)H-Index: 1
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
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Abstract This study deals with different magnetic additives based on ferrites (MnZn, LaCa (Co and Ti)), carbonyl iron (CI), and iron filaments (IF) formulated in epoxy resin. Morphological and structural characteristics of the additives were evaluated. Based on these additives samples with both different thickness and weight fractions (1-70 wt%) were prepared. The formulated composites were analyzed considering different electromagnetic characteristics: reflectivity, shielding effectiveness, the...
8 CitationsSource
1 CitationsSource
#1Simone de Souza Pinto (UNIFESP: Federal University of São Paulo)H-Index: 5
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
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This work deals with the study of radar absorbing materials (RAM) based on conductive samples obtained with polyaniline (PAni) (5-20 wt%) inserted in epoxy resin matrix. SEM analyses show that the PAni presents granular morphology, with an average diameter of 5 µm, with structures evenly distributed. DRX and FT-IR analyses show that the PAni polymer was successfully obtained in its conductive form. Electrical permittivity and magnetic permeability measurements of PAni/epoxy samples were performe...
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#1Simone de Souza Pinto (UNIFESP: Federal University of São Paulo)H-Index: 5
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
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Abstract This study aims to combine dielectric and magnetic properties of different materials in an unique composite. For this, poly(o-methoxyaniline), POMA, was chemically synthesized in situ on magnetic metallic filaments (MF). The obtained composite was inserted into an epoxy resin matrix in the proportions of 40, 50 and 70%, in weight (wt%). The samples were characterized by scanning electron microscopy (SEM), X ray diffraction (XRD) and electromagnetic measurements. On the last case, the me...
3 CitationsSource
#2Newton A.S. GomesH-Index: 3
Last. Vilson R. AlmeidaH-Index: 17
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O presente trabalho e um estudo prospectivo relacionado ao entendimento dos efeitos de variacoes de geometria em antenas tipo dipolo, projetadas para operar na faixa de frequencia Terahertz (THz), nos valores de amplitude de campo eletrico na regiao central das antenas (GAP). A identificacao e a correta otimizacao da geometria das antenas devem ser cuidadosamente consideradas de modo a maximizar o campo eletrico na regiao de interface entre a antena e o diodo retificador MIM, o que pode vir a pr...
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