Performance Prediction of Microwave Absorbers Based on POMA/Carbon Black Composites in the Frequency Range of 8.2 to 20 GHz

Autor(es)

Pinto, Simone Souza ^{[1, 2]} ; Rezende, Mirabel Cerqueira ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Inst Ciencia & Tecnol, Rua Talim 330, BR-12231280 Sao Jose Dos Campos, SP - Brazil

^[2] Inst Tecnol Aeronaut, Dept Ciencia & Tecnol Aeroespacial, Programa Posgrad Engn Aeronaut & Mecan, Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF AEROSPACE TECHNOLOGY AND MANAGEMENT; v. 10, 2018.
• Citações Web of Science: 0

Resumo

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 magnetic permeability measurements in the frequency range of 8.2 to 12.4 GHz. Afterwards, a linear extrapolation of these electromagnetic parameters until 20 GHz was carried out. These amounts were used as parameters for a set of simulations, developed from numerical implementation of theoretical predictions. The main advantage of the performed simulations is to know the behavior of the POMA/CB/epoxy resin as RAM in a wide range of frequencies (8.2-20 GHz), previously to the experimental work. The validation of the simulations with experimental reflection loss measurements showed a good fit and allowed predicting the material behavior as RAM. The results show that the studied RAM presents good return loss values in different frequencies, for example, -32 dB (similar to 99.95% of absorption) at 14.6 GHz and -18 dB at 19.2 GHz, for samples with 7 and 9 mm-thickness values, respectively. The simulation tool used in this study was adequate to optimize the RAM production, contributing to the reduction of development costs and processing time of this kind of material. (AU)

• Processo FAPESP: 10/09527-3 - Obtenção de materiais absorvedores de micro-ondas à base de compósitos condutivos de negro de fumo e nanotubos de carbono impregnados com poma
• Beneficiário: Simone de Souza Pinto
• Modalidade de apoio: Bolsas no Brasil - Doutorado