The application of the resonant cavity method to the analysis of the efficiency of the electromagnetic absorption of space and aviation electronic equipment shielding based on Mn-Zn ferrite additives
DOI:
https://doi.org/10.22480/revunifa.2013.26.595Keywords:
Absorbers of microwaves, Mn-Zn ferrites, Electromagnetic shields, Aeronautical applicationsAbstract
This paper presents an analysis of the electronic equipment electromagnetic shielding relative to the radiated emission using absorbing materials with the formulation of additives ferrite powders of Mn-Zn in the frequency band around Ghz. This material was designed and developed by the Institute for Advanced Studies (IEAv) in the Department of Aerospace Science and Technology (DCTA) . It is made of resins and used in applications as electromagnetic waves shielding in equipment for aviation and space with the main purpose to be applied on launcher vehicles of the Brazilian space program. It was obtained the patent letters on formulation and innovation; thus concluding a new innovative way of shielding in electronics in relation to radiated emission that operate in this sector. It also demonstrates a new technology for testing using the methodology of reflectivity measurement, which uses resonant cavities methods. This new methodology replaces the methodology Arch NRL (Naval Research Laboratory) and proves to be more efficient with a lower cost.
References
CARVALHO, M. I. B. Guias de Onda. Portugal: Universidade do Porto, 2005.
BRASIL. Comando da Aeronáutica. Departamento de Ciência e Tecnologia Aeroespacial. Composição e Fabricação da Ferrita MnO-MgO-Fe2O3. São José dos Campos-SP, 2012. (BR-PI020683-3,09 maio 2002, RPI 2160 Agosto 2012.)
BRASIL. Comando da Aeronáutica. Departamento de Ciência e Tecnologia Aeroespacial. Processo de Fabricação da Manta Absorvedora de Microondas com Resina Epóxi, 2013. (BR -PI-0203563-4 B1, 09 maio 2004,RPI 2192 Janeiro, 2013.)
CHIKAZUMI, S. Physics of magnetism. New York: John Wiley & Sons, 1964.
CLAYTON, R. P. Introduction to Electromagnetic Compatibility. New York: John Wiley & Sons, 1992. 763p.
FREITAS, C. A. R.; DE MIGLIANO, A. C. C., MELO, F.C.L. Características de Absorção da Radiação Eletromagnética em Revestimentos Planos à Base de Ferritas de Mg-Mn. INATEL-Telecomunicões, v. 1, dez, 2002.
KIM, J. M. et al. Complex permeability and permittivity and microwave absorption of ferriterubber composite in X-band frequencies. IEEE
Transactions on Magnetic, v. 27, issue 6, part. 2, p. 5462-5464, 1991.
MIGLIANO, A. C. C. et al. Caracterização experimental de tintas absorvedoras de radiação eletromagnética, In: CONGRESSO
INTERNACIONAL DE TINTAS, 6., 1999, São Paulo. Anais... São Paulo: Abrafati, 1999. p. 453-460. v. 2.
NAITO, Y.; SUETAKE, K. Application of ferrite to electromagnetic wave absorbers its characteristics. IEEE Transactions on Microwave Theory and Techniques, v. 19, issue 1, p. 65-72, 1971.
SAKIOTIS, N.G.; CHAIT, H.N. Ferrites at microwaves. Proceedings of the Institute of Radio Enginneers, v. 41, issue 1, p. 87-93, 1953.
SOBRINHO, J. P. F. Interferência eletromagnética nos centros urbanos. São Paulo: Erica, 2007.
ULABY, F. T. Eletromagnetismo para engenheiros. Tradução: José Lucimar do Nascimento. Porto Alegre: Bookman, 2007.
Downloads
Published
Issue
Section
License
Copyright (c) 2013 Carlos Alberto Reis de Freitas, Alberto José de Faro Orlando
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Revista da UNIFA permite que o (s) autor (es) mantenha(m) seus direitos autorais sem restrições. Atribuição-NãoComercial 4.0 Internacional (CC BY-NC 4.0) - Revista da UNIFA é regida pela licença CC-BY-NC
