High-frequency dielectric ceramic composition, dielectric resonator, dielectric filter, dielectri

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The present invention provides a high-frequency dielectric ceramic composition having both high dielectric constant ( epsilon r) and high Q value, and excellent temperature stability of the resonance frequency. The high-frequency dielectric ceramic composition contains a rare earth element (Ln), Mg, Ta, Ti. and M (M is at least one of Ca and Sr), has a composition represented by the composition formula by molar ratio, aLnOx/2-bMgO-cTaO5/2-dMO-eTiO2, wherein a, b, c, d, e and x are respectively in the ranges of 0.100 ≤ a ≤ 0.350, 0.067 ≤ b ≤ 0.233, 0.033 ≤ c ≤ 0.117, 0.150 ≤ d ≤ 0.400, 0.150 ≤ e ≤ 0.400, a + b + c + d + e =1, and 3 ≤ x ≤ 4, respectively.