Dielectric Ceramic Composition for High-Frequency Use and Method for Producing the Same, as Well as Dielectric Ceramic for High-Frequency Use and Method for Producing the Same and High-Frequency Circuit Element Using the Same

摘要

There is provided a dielectric ceramic composition for high-frequency use represented by a composition formula of a(Sn,Ti)O2-bMg2SiO4-cMgTi2O5-dMgSiO3. In the composition formula, a, b, c and d (provided that a, b, c and d are mol %) are within the following ranges: 4≦̸a≦̸37, 34≦̸b≦̸92, 2≦̸c≦̸15 and 2≦̸d≦̸15, respectively, and a+b+c+d=100. The dielectric ceramic composition for high-frequency use has a relative permittivity ∈r of 7.5-12.0, a Qm×fo value of not less than 50000 (GHz) and an absolute value of a temperature coefficient τf of resonance frequency fo of not more than 30 ppm/° C.