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The design of a temperature-stable stepped-impedance resonator using composite ceramic materials

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4 Author(s)
Sang-Kyu Lim ; Dept. of Electron. Eng., Sogang Univ., Seoul, South Korea ; Han-Young Lee ; Jun-Chul Kim ; Chul An

The authors present a method to design a coaxial ceramic resonator, whose resonance frequency is unchanged with temperature, using a material with a positive temperature coefficient of resonant frequency (τf) and a negative τf material. From the resonance conditions according to temperature variation, the length to be filled with each material is calculated to minimize the resonance frequency shift with temperature change. As an example, Ba(Zn 1/3Nb2/3)O3 and CaZrO3 are selected in this work, and their lengths are obtained at various resonant frequencies. The temperature dependence of the resonant frequency of this resonator is simulated

Published in:

IEEE Microwave and Guided Wave Letters  (Volume:9 ,  Issue: 4 )