Abstract
Yttrium iron garnet and calcium titanate (Y3Fe5O12-CaTiO3, YIG-CTO)
ceramic composite were obtained according to the well-established
solid-state route. This system was studied by complex impedance
spectroscopy as a function of temperature. All samples showed a
thermo-activated relaxation with energy activation between 1.10 and 1.70
eV. The CaTi0.6Fe0.4O2.8 phase is formed during sintering process, which
influences in the electrical behavior of the samples. Nyquist diagrams
were adjusted by two equivalent circuits in series to represent electric
response. The YIG-CTO system was also used to design a dielectric
resonator antenna (DRA) for microwave applications. The results indicate
that DRA YIG-CTObased presented an operation frequency range around 1-7
GHz, and reflection coefficient below -38 dB. From obtained results, the
YIG-CTO composite is a great candidate for usage in electronic devices,
operating in the C-band, such as WiFi and ISM band applications. (C)
2019 Elsevier B.V. All rights reserved.
Users
Please
log in to take part in the discussion (add own reviews or comments).