EFFECTS OF La2O3 AND Bi2O3 ADDITIONS ON THE MICROWAVE DIELECTRIC AND ANTENNA PROPERTIES OF SrBi2Nb2O9 CERAMIC MATRIX

Authors

  • Roterdan Fernandes Abreu Universidade Federal do Ceará/ Doutorando
  • F. R. Silva Federal Institute of Education, Science and Technology of Ceará
  • S. O. Saturno Telecommunication Engineering Department, Federal University of Ceará (UFC)
  • D. da M. Colares Telecommunication Engineering Department, Federal University of Ceará (UFC)
  • T. O. Abreu
  • J. P. C do Nascimento
  • E. O. Sancho
  • J. C. Sales
  • D. X. Gouveia
  • A. S. B. Sombra

DOI:

https://doi.org/10.21439/jme.v4i2.94

Keywords:

SrBi2Nb2O9, Microwave, Bi2O3, La2O3, DRA

Abstract

This work presents a comparison between the dielectric properties of the SrBi2Nb2O9 (SBN)ceramic matrix and the individual additions of Bi2O3and La2O3, suggesting the material that would be most suitable for microwave applications. The SBN sample was synthesized by solid-state reaction, and the X-ray diffraction method (XRD) was used for the structural characterization of the materials analyzed in this study. The thermal stability of the samples was measured experimentally by studying the temperature coefficient of resonant frequency (τf) the results confirm that the individual additions of 15wt% of Bi2O3or La2O3improved the thermostability of the composites. The Hakki-Coleman method was used to obtain the dielectric properties in the microwave range, and it is possible to observe that the dielectric permittivity of the composites increased, while their loss tangents decreased. The numerical simulation demonstrated the functioning of the materials as dielectric resonating antennas (DRA), with a reflection coefficient below -10 dB in all samples.

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References

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Published

2021-10-31

How to Cite

Abreu, R. F., Silva, F. R. ., SATURNO, S. O., COLARES, D. D. M. ., ABREU, T. O., do Nascimento, J. P. C., Sancho Oliveira, E. de O. ., Sales, J. C., Gouveia, D. X. ., & Sombra, A. S. B. (2021). EFFECTS OF La2O3 AND Bi2O3 ADDITIONS ON THE MICROWAVE DIELECTRIC AND ANTENNA PROPERTIES OF SrBi2Nb2O9 CERAMIC MATRIX. Journal of Mechatronics Engineering, 4(2), 2–11. https://doi.org/10.21439/jme.v4i2.94

Issue

Vol. 4 No. 2 (2021): Journal of Mechatronics Engineering, v. 4, n. 2, October, 2021

Section

Electronics and Photonics

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