From optimization to dielectric resonator antenna (DRA) application of YIG: Synthesis approach

•99.2% of the YIG purity was optimized using ANOVA-statistical approach.•The optimized YIG has shown a strong frequency resonant at 12.501GHz.•Less than 1% error indicated the optimized YIG is suitable to be used as a DRA.•A stable radiation pattern of optimized YIG was also observed stable. The eff...

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Bibliographic Details
Published in:Journal of alloys and compounds 2015-10, Vol.645, p.541-552
Main Authors: Wan Ali, Wan Fahmin Faiz, Othman, Mohamadariff, Ain, Mohd Fadzil, Abdullah, Norazharuddin Shah, Ahmad, Zainal Arifin
Format: Article
Language:English
Subjects:
ANOVA-statistical
Antennas
Dielectrics
DRA
Formations
Magneto-dielectrics
Mathematical models
Optimization
Purity
Radio antennas
Resonators
YIG
Yttrium-iron garnet
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Summary:•99.2% of the YIG purity was optimized using ANOVA-statistical approach.•The optimized YIG has shown a strong frequency resonant at 12.501GHz.•Less than 1% error indicated the optimized YIG is suitable to be used as a DRA.•A stable radiation pattern of optimized YIG was also observed stable. The efficacy of yttrium iron garnet (YIG) as magneto-dielectric ceramic, depends heavily on its purity. The presence of undesirable phase(s) such as yttrium iron perovskite (YIP) has led to performance deterioration, which is critical especially in wireless communication devices. This work presents the use of an ANOVA-statistical approach to improve and optimize the YIG’s purity. Effects of particle sizes (5, 50 and 100μm), reactant concentration (excess Fe2O3 in standard YIG formulation – 0, 10, and 20wt%), and formation temperatures (1150, 1200, and 1250°C), on the purity of YIG were investigated. The results indicated that the obtained statistical model adequately represented the experimental data, as reflected in the 3D contour plot. It was also discovered that the concentration of Fe2O3 reactant (up to 8wt%) and formation temperature (1240°C), significantly affects the formation of high-purity YIG while variation of the reactant’s particle sizes is seen insignificant. Finally, a possible application of the optimized YIG (OPYIG) in dielectric resonator antenna (DRA) application is demonstrated. It was found that OPYIG was resonating at 12.50GHz with a stable and bi-directional radiation pattern. This optimization process is successfully produced 99.2% YIG and could be suitable for DRA application.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2015.05.092