High frequency dielectric ceramic compact, dielectric resonator, dielectric filter, dielectric duplexer, and communication apparatus

摘要

A high-frequency dielectric ceramic compact is provided which has a relative dielectric constant (ε_r) of about 20 or less and a Q value of about 20,000 or more at 1 GHz, in which the temperature coefficient (τ_f) can be optionally controlled at about 0 (ppm/°C). When the compact of the dielectric ceramic compact is represented by the formula aBaO·bMeO·cSbO_3/2, 0.476 ≤ a ≤ 0.513, 0.160 ≤ b ≤ 0.175, and 0.324 ≤ c ≤ 0.350. In addition, when the compact of the dielectric ceramic compact is represented by the formula dBaO·eMeO·fSbO_3/2·gTiO₂, 0.476 ≤ d ≤ 0.513, 0.100 ≤ e ≤ 0.175, 0.200 ≤ f ≤ 0.349, and 0 g ≤ 0.200.