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

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

doi:10.4028/www.scientific.net/MSF.869.79

Paper Titles

Effect of Boron and Carbon Addition on the Phase Transformations during High-Energy Ball Milling and Subsequent Sintering of Si₃N₄+B and Si₃N₄+C Powder Mixtures
p.58

Fracture Stress Analysis in Ceramic Composites of Alumina Matrix with Zirconia 3Y-TZP Nanograins for Mechanical Shielding of Satellites
p.64

Synthesis and Sintering of LaCo_1-XFe_xO₃ Ceramics: Microstructure Analysis
p.69

Thermal Characterization of Neodymium-Barium-Copper Ceramic (NBCo Ceramic) Synthesized from Barium Carbonate
p.74

Ga₂O₃-Doped ZnO-Nb₂O₅-TiO₂ Dielectric Resonators for Terrestrial and Space Telecommunications Applications
p.79

Rheological Behavior of Paraffin-Alumina Emulsions and their Microstructural Effects
p.85

Evaluation of Sample Preparation Parameters in the Compressive Strength of Cementitious Composites
p.93

A Study of the Mechanical Behavior of Concrete Using Additive and Waste Tires Rubber through a Diametral Compression Test Using Digital Image Correlation
p.98

Determining the Content of Toxic Substances in Panels from Pruning Acacia mangium Willd
p.102

HomeMaterials Science ForumMaterials Science Forum Vol. 869Ga2O3-Doped ZnO-Nb2O5-TiO2 Dielectric Resonators...

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

Abstract:

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 Ga₂O₃-doped ZnO-Nb₂O₅-TiO₂ 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 TiO₂ 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.

You might also be interested in these eBooks

21st Brazilian Conference on Materials Science and Engineering

View Preview

Info:

Periodical:

Materials Science Forum (Volume 869)

Pages:

79-84

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.869.79

Citation:

Cite this paper

Online since:

August 2016

Authors:

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

Keywords:

Ceramic Microstructures, Dielectric Constant, Dielectric Resonators, Microwave Dielectric Properties

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

* - Corresponding Author

References

[1] P.J. Castro: Dielectric resonators and their applications in microwave oscillators. Doctoral (Thesis). São Paulo, 1989. Universidade de São Paulo (USP/Poli/Elétrica). (SP). (In Portuguese).

DOI: 10.29381/0103-8559/20213103334-44

Google Scholar

[2] E.G.L. Rangel: A study of microwave dielectric properties of ZnO-Nb2O5-TiO2 ceramic system for applications in space communications. Doctoral (Thesis). São José dos Campos, 2011. Instituto Nacional de Pesquisas Espaciais (INPE). (SP) (In Portuguese).

Google Scholar

[3] D.W. Kim, D.Y. Kim. K. S, Hong: J. Mat. Res. Vol. 15 (2000), p.1331.

Google Scholar

[4] D. W Kim, K.H. Ko, D.K. Kwon, K.S. Hong: J. Amer. Ceram. Soc. Vol. 85 (2002), p.1169.

Google Scholar

[5] E.A. Nenasheva, S. S. Redozubov, N. F. Kartenko, I. M. Gaidamaka: J. Eur. Ceram. Soc. Vol. 31 (2011), p.1097.

Google Scholar

[6] B.W. Hakki, P.D. Coleman: Int. Radio Eng. Trans. MTT-8 (1960), p.402.

Google Scholar

[7] M.T. Sebastian: Dielectric Materials for Wireless Communication. (Elsevier Publications, Amsterdam 2008).

Google Scholar

[8] J. Kuman, N. Gupta: Wireless Pers. Commun. Vol. 75 (2014), p.1029.

Google Scholar

[9] M. Abedian, S.K.A. Rahim, S.H. Danesh: IEEE Antennas Wirelles Propag. Lett. Vol. 12 (2013), p.1523.

Google Scholar