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 ( epsilon r) of about 20 or less and a Q value of about 20,000 or more at 1 GHz, in which the temperature coefficient ( tau f) can be optionally controlled at about 0 (ppm/ DEG C). When the compact of the dielectric ceramic compact is represented by the formula aBaO.bMeO.cSbO3/2, 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.fSbO3/2.gTiO2, 0.476 ≤ d ≤ 0.513, 0.100 ≤ e ≤ 0.175, 0.200 ≤ f ≤ 0.349, and 0 g ≤ 0.200.