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Ga2O3-Doped ZnO-Nb2O5-TiO2 Dielectric Resonators for Terrestrial and Space Telecommunications Applications

Nono, Maria do Carmo de Andrade ; Castro, Pedro José ; Rangel, E.G.L. ; Mineiro, Sergio Luiz

Materials science forum, 2016-08, Vol.869, p.79-84 [Periódico revisado por pares]

Pfaffikon: Trans Tech Publications Ltd

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  • Título:
    Ga2O3-Doped ZnO-Nb2O5-TiO2 Dielectric Resonators for Terrestrial and Space Telecommunications Applications
  • Autor: Nono, Maria do Carmo de Andrade ; Castro, Pedro José ; Rangel, E.G.L. ; Mineiro, Sergio Luiz
  • Assuntos: Ceramics ; Dielectric properties ; Materials science ; Microstructure ; Satellite communications ; Testing laboratories
  • É parte de: Materials science forum, 2016-08, Vol.869, p.79-84
  • Descrição: Dielectric ceramics find application as dielectric resonators (DRs) in communications systems operating at microwave frequencies. RDs for this application require a unique set of properties: high value of the dielectric constant, low dielectric loss and high frequency stability. This paper presents an investigation of the correlation between the dielectric properties, the characteristics of microstructure and the crystalline phases of Ga 2 O 3 -doped ZnO-Nb 2 O 5 -TiO 2 ceramic system. The ceramics sintered at 1200 °C were characterized as for density, crystalline phases, microstructure and microwave dielectric properties. The results showed that these dielectric ceramics, obtained from the TiO 2 anatase crystalline structure, present dielectric constant and quality factor (Q) values appropriate for their use as dielectric resonators in microwave circuits. According to the experiments, as the gallium doping has raised, the dielectric constant increased, the Q factor decreased and the temperature coefficient had a tendency to decrease to a certain extent.
  • Editor: Pfaffikon: Trans Tech Publications Ltd
  • Idioma: Inglês
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