Tuning the properties of microwave dielectric resonators in a stack configuration

摘要

The microwave properties of ceramic dielectric resonators in a stack configuration are investigated using two different dielectric materials with opposite temperature coefficients of resonant frequency in the temperature range 50-300 K. The two dielectrics, which have been studied, are Ba_5Nb_4O_(15) and 5ZnO-Nb_2O_5, synthesized by the conventional solid-state ceramic route. The temperature coefficient of resonant frequency of the stack resonator is tuned by varying the volume fraction of 5ZnO-Nb_2O_5. Temperature coefficient of resonant frequency slowly changed from a non-linear to almost a linear behavior with increase in the volume fraction of 5ZnO-Nb_2O_5