Recent Progress on the Dielectric Properties of Dielectric Resonator Materials with their Applications to Electronic Components for Mobile Communication

Abstract

Since the 1970's, dielectric resonator materials have been developed and put into practical use for filters and oscillators in microwave frequency, miniaturizing these components and saving costs. The concentrated effort has been undertaken to decrease the dielectric loss of these materials. In this paper, the recent progress on the dielectric properties of dielectric resonator materials is reported with their practical applications. The dielectric materials suitable for each application such as the antenna duplexer for.handymobile phone, the filter for cellular base station, millimeter-wave application and high temperature superconductor are introduced with their dielectric properties.