High-frequency dielectric ceramic member, dielectric resonator, dielectric filter, dielectric duplexer, and communication device

摘要

A high-frequency dielectric ceramic member is composed of an oxide ceramic containing Mg, Ba, Re, Ti, and O, wherein Re is at least one element selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Dy, and Er. The oxide ceramic is represented by the formula aMgO-bBaO-cRe₂O_n-(100-a-b-c)TiO₂, wherein n=3 when Re is La, Nd, Sm, Eu, Dy, or Er, n=11/3 when Re is Pr, and n=4 when Re is Ce, wherein a, b, and c, in mole percent, satisfy the relationships 10.0≦a≦62.0, 0b≦14.0, and 0c≦16.5. A dielectric resonator, a dielectric filter, a dielectric duplexer, and a communication device, each including the high-frequency dielectric ceramic member, are also disclosed.