Radar Absorbing Materials Ram
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Frequency Selective Surface Properties of Microwave New Absorbing Porous Carbon Materials Embedded in Epoxy Resin
In this manuscript, the electromagnetic wave absorption properties of sustainable porous carbon composites were evaluated over the X-band frequency range (8.2 - 12.4 GHz). The porous carbon material was made from the byproduct of cellulose production and was used as additive on the development of radar absorbing material (RAM) composites. These porous carbon
Mat. Res.. Publicado em: 21/10/2019
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2. Effect of the Morphology and Structure on the Microwave Absorbing Properties of Multiwalled Carbon Nanotube Filled Epoxy Resin Nanocomposites
The current research shows the effect of structural and morphological differences of multilayer carbon nanotubes (CNT) on radar absorbing materials (RAM) performance. Two CNT samples, from different manufacturers, had their morphological and structural aspects investigated by XRD, SEM and SEM-FEG analyses. CNT/epoxy resin based nanostructured composites were
Mat. Res.. Publicado em: 16/07/2018
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3. Performance Prediction of Microwave Absorbers Based on POMA/Carbon Black Composites in the Frequency Range of 8.2 to 20 GHz
ABSTRACT: This paper presents a comparative study involving experimental and numerical behaviors of radar absorbing materials (RAM), based on conducting composites of poly(o-methoxyaniline) (POMA) and carbon black (CB). Samples of POMA/CB in epoxy resin matrix were prepared. First, these samples were experimentally characterized by electric permittivity and
J. Aerosp. Technol. Manag.. Publicado em: 29/03/2018
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4. Analysis of Radar Cross Section Reduction of Fighter Aircraft by Means of Computer Simulation
ABSTRACT: This paper presents a preliminary study of the Radar Cross Section (RCS) reduction on the fighter aircraft. First, it was studied the RCS of the aircraft from computational simulations based on prior knowledge of vulnerable areas of this aircraft to radar threats. Subsequently, the possible applications of Radar Absorbing Materials (RAM) on the sur
J. Aerosp. Technol. Manag.. Publicado em: 2014-06
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5. Complex permeability and permittivity variation of radar absorbing materials based on MnZn ferrite in microwave frequencies
The complex dielectric permittivity (ε) and magnetic permeability (µ) of Radar Absorbing Materials (RAM) based on magnetic particles (MnZn ferrite particles) embedded in a dielectric matrix (silicon rubber) have been studied in the frequency range of 2 to 18 GHz. The relative permeability and permittivity of MnZn ferrite-silicon composites for various mass
Mat. Res.. Publicado em: 21/05/2013
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6. Measurements in an Outdoor Facility and Numerical Simulation of the Radar Cross Section of Targets at 10 GHz
Abstract This paper presents preliminary data from an ongoing study on the radar cross section (RCS) of targets with simple and complex surface geometries (a flat square plate, a 90° dihedral corner reflector and a retired air-to-air missile). Measurements and computer simulations of these metallic targets were carried out at 10 GHz and also when the surfac
J. Aerosp. Technol. Manag.. Publicado em: 2011-04
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7. Estudo da viabilização do uso da mistura híbrida ferrocarbonila / ferrita de NI0,5Zn0,5Fe2o4 como material absorvedor de radiação eletromagnética
Foram sintetizadas ferritas de NiZn no sistema Ni0,5Zn0,5Fe2O4, pelo método dos citratos precursores. A decomposição dos precursores foi estudada por análise termogravimétrica e espectroscopia na região do infravermelho na temperatura de 350C/3h. A evolução das fases formadas após calcinações a 350C/3h, 600, 1000 e 1100C/2h foi acompanhada por dif
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2010
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8. Complex permeability and permittivity variation of carbonyl iron rubber in the frequency range of 2 to 18 GHz
Abstract: The complex dielectric permittivity (e) and magnetic permeability (m) of Radar Absorbing Materials (RAM) based on metallic magnetic particles (carbonyl iron particles) embedded in a dielectric matrix (silicon rubber) have been studied in the frequency range of 2 to 18 GHz. The relative permeability and permittivity of carbonyl iron-silicon composit
J. Aerosp. Technol. Manag.. Publicado em: 2010-04
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9. Estudo das características magnéticas e absorvedoras das ferritas de nizn, niznmn, mnzn, nimg, nicuzn e nicuznmg obtidas via método do citrato precursor
Foram sintetizados os sistemas Ni0,5Zn0,5Fe2O4, Ni0,2Zn0,5Mn0,3Fe2O4, Mn0,5Zn0,5Fe2O4, Ni0,5Mg0,5Fe2O4, Ni0,2Cu0,3Zn0,5Fe2O4 e Ni0,2Cu0,3Zn0,5Mg0,08Fe2O4, pelo método dos citratos precursores. A decomposição dos precursores foi estudada por análise termogravimétrica e espectroscopia na região do infravermelho, na temperatura de 350C/3h. A evolução da
Publicado em: 2009
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10. Blendas de polianilina e poliestireno obtidas por processamento reativo : preparação e caracterização
One of the major current objectives in the research of intrinsically conducting polymers (PIC) is the production of blends, which combine the processing properties of common thermoplastic polymers with the conductivity of conducting polymers. The main problem in applying PIC in large scale in the plastic industry has been the infusibility of these polymers,
Publicado em: 2002