H
H. D. de Andrade
Researcher at Federal University of Rio Grande do Norte
Publications - 12
Citations - 58
H. D. de Andrade is an academic researcher from Federal University of Rio Grande do Norte. The author has contributed to research in topics: Dielectric & Dielectric spectroscopy. The author has an hindex of 3, co-authored 12 publications receiving 31 citations.
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Journal ArticleDOI
Effects of CaTiO3 addition on the microwave dielectric properties and antenna properties of BiVO4 ceramics
R. G. M. Oliveira,R.A. Silva,J. E. V. de Morais,G. S. Batista,Marcelo Antônio Santos Da Silva,J.C. Góes,H. D. de Andrade,I. S. Queiroz Júnior,Charanjeet Singh,Antonio Sergio Bezerra Sombra +9 more
TL;DR: In this article, the authors investigated the microwave dielectric properties through the Hakki-Coleman method of BiVO4 ceramic matrix, obtained by the solid-state reaction method, using 8, 16, 24 and 32% of CaTiO3.
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Comparison of spatial interpolation methods to determine exposure ratio to electric fields in urban environments
TL;DR: In this article, the authors evaluate which method of interpolation, among the studied techniques, has the best performance to estimate accurately the intensity values of electric fields by analysing the parameters mean absolute error and RMS error.
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High thermal stability and colossal permittivity of novel solid solution LaFeO3/CaTiO3
S. J. T. Vasconcelos,Marcelo Antônio Santos Da Silva,R.G.M. de Oliveira,M. H. Bezerra Junior,H. D. de Andrade,I. S. Queiroz Júnior,Charanjeet Singh,Antonio Sergio Bezerra Sombra +7 more
TL;DR: In this article, the authors presented the novel (LaFeO3)(1-m)(CaTiO3)m (m = 0, 0.1 and 0.5 in weight fraction) solid solutions.
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Analysis and development of an electromagnetic exposure map based in spatial interpolation
H. D. de Andrade,A.L. de Figuêiredo,B. R. Fialho,J.L. da S. Paiva,I. de S. Queiroz Júnior,Matheus Emanuel Tavares Sousa +5 more
TL;DR: In this paper, the authors proposed an analysis of EMF exposure levels and spatial distribution over the region of the input and power circuits of a 230 kV/60 Hz air-insulated substation.
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Dielectric characterisation and numerical investigation of SrBi2Nb2O9–Bi2O3 composites for applications in microwave range
R. F. Abreu,S. O. Saturno,J. P. C. do Nascimento,E. O. Sancho,J. E. V. de Morais,J. C. Sales,D. X. Gouveia,H. D. de Andrade,I. S. Queiroz Júnior,Antonio Sergio Bezerra Sombra +9 more
TL;DR: In this article, the dielectric properties and behavior of DAs based on SrBi2Nb2O9 (SBN)-Bi2O3 composites were studied.