In this work, the influence of the addition of Bi₂O₃ on the dielectric properties in the microwave range of BiCu₃Ti₃FeO₁₂ (BCTFO) ceramic matrix and its potential application as a dielectric resonator antenna are analysed. X-ray diffraction shows that a reaction between BCTFO and Bi₂O₃ occurs that results in the formation of new crystalline phases. The morphology of the samples is studied by field-emission scanning electron microscopy and demonstrates a dependence of the grain size on the Bi₂O₃ content. From the Mössbauer spectroscopic analysis, it is found that the Fe³⁺ ions replace the Ti⁴⁺ in the crystalline structure. The addition of Bi₂O₃ also reduces the dielectric permittivity (ϵ_r), dielectric loss (tan δ) and the coefficient of the resonance frequency (τ_f) values. Finally, numerical simulations are carried out in order to obtain the antenna parameters and they demonstrate that BCTFO could be a potential candidate for devices operating in the S-band.

在这项工作中，分析了添加Bi ₂ O ₃对BiCu ₃ Ti ₃ FeO ₁₂ (BCTFO)陶瓷基体微波范围介电性能的影响及其作为介电谐振器天线的潜在应用。X 射线衍射显示 BCTFO 和 Bi ₂ O _{3 之间}发生反应，导致形成新的晶相。通过场发射扫描电子显微镜研究样品的形态并证明晶粒尺寸对Bi ₂ O ₃含量的依赖性。由穆斯堡尔光谱分析发现，Fe ³⁺离子取代晶体结构中的Ti ⁴⁺。添加 Bi ₂ O ₃还降低了介电常数 ( ε _r )、介电损耗 (tan δ ) 和谐振频率系数 (τ _f ) 值。最后，进行数值模拟以获得天线参数，并证明 BCTFO 可能是在 S 波段运行的设备的潜在候选者。