Experimental and numerical investigation of dielectric resonator antenna based on doped Ba(Zn_1/3Ta_2/3)O₃ ceramic

ABSTRACT

This paper reports a numerical and experimental investigation of the microwave dielectric properties of ZrO₂ and Cr₂O₃ doped Ba(Zn_1/3Ta_2/3)O₃ ceramic prepared the conventional solid-state ceramic route. The influence of these doping on the dielectric properties in the microwave frequencies of the Ba(Zn_1/3Ta_2/3)O₃ matrix is investigated. The pure sample showed a dielectric permittivity around 28.98, with loss of around 10⁻⁵ and close to zero. ZrO₂ and Cr₂O₃ were added to the pure specimen with differents amounts 0.5 mol% and 1 mol%. The experimental and theoretical characteristics of the resonator like return loss, bandwidth, input impedance are in good agreement. The simulations of radiation patterns are presented. The samples showed a frequency response bandwidth (BW_{−10 dB}) of around 3% (simulated) for the frequency operation.

KEYWORDS:

• Ba(Zn_1/3Ta_2/3)O₃
• dielectric resonator antenna
• microwave
• dielectric ceramic

Acknowledgments

This work was partly sponsored by Telecommunication and Science and Engineering of Materials Laboratory (LOCEM) and Coordination for the Improvement of Higher Level Personnel (CAPES) - Brazilian agencies.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was partly sponsored by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and Coordination for the Improvement of Higher Level Personnel (CAPES) - Brazilian agencies.

Notes on contributors

R. V. Leite

R. V. Leite is head of the Condensed Matter Group research of the Universidade Estadual Vale do Acaraú (www.uvanet.br), and researcher collaborator in the Telecommunications and Materials Science and Engineering Laboratory (LOCEM) at the Physics Department at Federal University of Ceará. The main interest areas include research and development magnetism and magnetic material, specifically impurities in magnetic films. He is also involved in the study of electric, dielectric and piezoelectric properties of new ceramics, glasses, polymers and films for microwave and radio-frequency applications.

F. O. S. Costa

F. O. S. Costa recently received M.Sc. degree in electrical and computation engineering from the Federal University of Ceará, he writes on both Dielectric Resonator Antenna and Microstrip Antenna. He recently wrote an article titled “Proposal of dielectric resistive antenna based on ceramic matrix Ba(Mg_1/3Ta_2/3)O₃ in XXXV Brazilian symposium on telecommunications and processing of signals” (2017).

Mailadil T. Sebastian

Mailadil T. Sebastian has retired as Chief Scientist and Head from Materials Science & Technology Division, National Institute for Interdisciplinary Science & Technology (NIIST), Trivandrum, India. He works on materials for telecommunication. Among his recent books are Dielectric materials for wireless communication (Elsevier Science Publishers, 2008) and Microwave materials and applications in two volumes (editors Sebastian, Ubic and Jantunen, Wiley, 2017). He has published more than 350 papers in refereed journals.

A. J. M. Sales

A. J. M. Sales is an investigator of the Institute of Nanostructures, Nanomodeling and Nanofabrication (I3N) at the University of Aveiro-PT, and writes papers on impedance spectroscopy, antennas and luminescence optical. Among his recent works is the chapter “The use of cylindrical DRA for electrical analysis” (Nova Science Publishers, 2018) and the paper “Magneto tuning of a ferrite dielectric resonator antenna based on LiFe5O8 matrix” (J Electron Mater., 2018).

A. S. B. Sombra

A. S. B. Sombra is head of the Telecommunications and Materials Science and Engineering Laboratory (LOCEM) at the Physics Department at the Federal University of Ceara (www.locem.ufc.br). His main interest areas include research and development in optical fiber and planar devices for optical networks. He is also involved in the study of electric, dielectric and piezoelectric properties of new ceramics, glasses, polymers and films for antennas, microwave and radio-frequency applications.