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Synthesis and characterization of organic substrate in the S band for application in microstrip antennas

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Abstract

In this work, an investigation about the use of carnauba wax as a substrate/superstrate for microstrip antennas is presented. The operating conditions of the material were established through chemical, physical, and electrical analyzes; the XDR and FT-IR allowed to validate and observe the chemical composition of the wax; the mechanical properties were obtained through the Vickers microhardness test and the digital image correlation method and the surface analysis was possible through SEM; the electrical characterization comprised the relative dielectric constant and the loss factor, and the electrical quantities were obtained for the microwave frequency (S band) using the coaxial probe method. These measures made it possible to design and manufacture microstrip antennas with a substrate of carnauba wax and with a substrate of FR4 covered with a superstrate of carnauba wax. The measured antennas obtained resonance frequency around 2.4 GHz, with a bandwidth of 80 MHz. Input impedance of Zi = 50 − j0.1 Ω in some samples and a reflection coefficient of − 46.23 dB in others were obtained.

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Acknowledgements

This study was financed in part by the Coordination for the Improvement of Higher Education Personnel—(CAPES) and by CNPq. We are grateful to the Federal University of Rio Grande do Norte (UFRN) and Federal Rural University of the Semi‐Arid (UFERSA).

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Authors and Affiliations

  1. Department of Electrical Engineering, Grande Do Norte (UFRN), Federal University of Rio, University Campus Lagoa Nova, P. O. Box 1524, Natal, RN, 59078-970, Brazil

    José de A. P. Magno & Valdemir P. Da S. Neto

  2. Department of Environmental Sciences and Technology, Federal Rural University of the Semi-Arid Region (UFERSA), District Pres. Costa e Silva, P. O. Box 137, Mossoró, RN, 59.625-900, Brazil

    Carlos E. C. Cavalcante, Stefany K. dos S. de S. Queiroz, Idalmir de S. Queiroz Jr., Francisco E. N. Fraga & Humberto D. de Andrade

  3. Department of Computer Engineering, Federal University of Ceara (UFC), District Coronel. Estanislau Frota, P. O. Box 563, Sobral, Ceará, 62.010-560, Brazil

    Reuber R. de Melo

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  1. José de A. P. Magno
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  2. Valdemir P. Da S. Neto
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  3. Carlos E. C. Cavalcante
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Correspondence to José de A. P. Magno.

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Magno, J.A.P., Neto, V.P.S., Cavalcante, C.E.C. et al. Synthesis and characterization of organic substrate in the S band for application in microstrip antennas. J Mater Sci: Mater Electron 32, 1829–1841 (2021). https://doi.org/10.1007/s10854-020-04951-x

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