Improved High‐Q Dielectric Resonator with Complex Perovskite Structure

Microwave characteristics of the system Ba(Zn 1/3 Ta 2/3 )O 3 ‐BaZrO 3 were investigated. Ba(Zn,Ta)O 3 has a perovskite pseudocell and hexagonal superstructure; the superstructure was not formed after addition of BaZrO 3 . Both sintering and crystallization of Ba(Zn,Ta)O 3 ‐BaZrO 3 were accelerated compared to those of Ba(Zn,Ta)O 3 alone, and the microwave Q value was also improved. The material optimized for the dielectric resonator, Ba(Ni,Ta)O 3 ‐Ba(Zr,Zn,Ta)O 3 , has a dielectric constant of 30, Q value of 10000 at 10 GHz, and temperature coeficient of resonant frequency of 0 ppm/°C.