Experimental and numerical investigation of dielectric resonator antenna based on doped Ba(Zn1/3Ta2/3)O3 ceramic

R. V. Leite, F. O. S. Costa, Mailadil T. Sebastian, A. J. M. Sales and A. S. B. Sombra

Journal of Electromagnetic Waves and Applications, 2019, vol. 33, issue 1, 84-95

Abstract: This paper reports a numerical and experimental investigation of the microwave dielectric properties of ZrO2 and Cr2O3 doped Ba(Zn1/3Ta2/3)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(Zn1/3Ta2/3)O3 matrix is investigated. The pure sample showed a dielectric permittivity around 28.98, with loss of around 10−5 and $ {\boldsymbol{\tau }_{\boldsymbol{f}}} $ τf 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.

Date: 2019
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DOI: 10.1080/09205071.2018.1526131

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