Abstract
This manuscript discusses the potential of yttrium iron garnet (YIG) with various amounts of Fe2O3 excess, as a tunable dielectric resonator antenna. The exploration of YIG’s antenna microwave properties is a key to determine stability of the antenna radiation pattern and frequency shifting. YIG with various amounts of excess Fe2O3 is prepared through a mixed oxide powder technique. Through X-ray diffraction analysis, it was found that addition of 5 wt% excess Fe2O3 to YIG stoichiometric formulation has depleted YIP phases in YIG ceramics. However, increasing amount of excess Fe2O3 in excess of 15 wt% led to increase in the Fe2O3 residue in YIG ceramics. The grains observed using high resolution electron microscopy displayed a well-packed structure. The size of the grains became bigger when the percentage of Fe2O3 increased to 20 % but accompanied with significant changes in electrical properties. This change has led to a frequency shift from 14.14 to 17.32 GHz, which cover applications within the Ku-band (12.00–18.00 GHz) together with radiation stability. These results imply that inclusion of excess Fe2O3 can be used for tunable DRA.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have