Microwave dielectric properties of novel ceramic for application in wireless communications

Abstract

The microwave dielectric properties of La(Mg_0.5-xSr_xSn_0.5)O₃ ceramics were examined with a view to their exploitation for wireless communications. The La(Mg_0.5-xSr_xSn_0.5)O₃ ceramics were prepared by the conventional solid-state method with various sintering temperatures. The La(Mg_0.5-xSr_xSn_0.5)O₃ ceramics contained La₂O₃. An apparent density of 6.56 g/cm³, a dielectric constant (ϵ_r) of 20.5, a quality factor (Q × f) of 107,900 GHz, and a temperature coefficient of resonant frequency (τ_f) of -84 ppm/°C were obtained for La(Mg_0.4Sr_0.1Sn_0.5)O₃ ceramics that were sintered at 1500 °C for 4 h.