A hybrid dielectric resonator antenna based upon novel complex perovskite microwave ceramic

The microwave dielectric properties of Nd(Mg0.5−xCaxSn0.5)O3 ceramics were examined to evaluate their exploitation in mobile communication. The X-ray diffraction patterns of Nd(Mg0.43Ca0.07Sn0.5)O3 ceramics revealed no significant variation of phase with sintering temperatures. Nd(Mg0.43Ca0.07Sn0.5)O3 ceramics that were sintered at 1550 °C for 4 h had the following properties: a density of 6.88 g/cm3, a dielectric constant (εr) of 19.51, a quality factor (Qf) of 100,400 GHz, and a temperature coefficient of resonant frequency (τf) of −57.8 ppm/°C. The proposed hybrid dielectric resonator covered the industrial, scientific, medical (ISM), high-performance radio local area network (HIPERLAN), and unlicensed national information infrastructure (UNII) bands. A 12.5% bandwidth (return loss <10 dB) of 2.43 GHz, and a 14.2% bandwidth (return loss <10 dB) of 5.62 GHz were successfully achieved.