High-frequency dielectric ceramic composition, dielectric resonator, dielectric filter, dielectric duplexer, and communication apparatus

摘要

High specific dielectric constant _{r it} possesses high Q value, in addition 0ppm/C focusing on it can control the temperature coefficient of resonance frequency_f optionally, it tries to offer the dielectric porcelain composition for high frequency. Composition formula: x which xCaTi _aO1+2a-yCa (Al _{b/2Nb c/2}) the O_1+(3b+5c)/4 -zCa (Mg _{d/2W e/2}) the O_1+(d+3e)/possesses the constitution which is displayed with_2, in the above-mentioned composition formula, y, z, a and b, c, d, and e (however x, as for y and z mol ratio is), it is inside the range of 0.475x0.58, 0.21y0.505, 0.018z0.25, x+y+z=1.000, 0.9a1.05, 0.9b1.1, 0.9c1.1, 0.9d1.1 and 0.9e1.05.