Title :
The design of a temperature-stable stepped-impedance resonator using composite ceramic materials
Author :
Lim, Sang-kyu ; Lee, Han-Young ; Kim, Jun-chul ; An, Chul
Author_Institution :
Dept. of Electron. Eng., Sogang Univ., Seoul, South Korea
fDate :
4/1/1999 12:00:00 AM
Abstract :
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
Keywords :
UHF devices; ceramics; composite materials; electric impedance; resonators; thermal stability; BaZnNbO3; CaZrO3; composite ceramic materials; positive temperature coefficient material; stable resonance frequency; stepped-impedance resonator; temperature dependence simulation; temperature-stable resonator; Ceramics; Composite materials; Design methodology; Dielectric constant; Dielectric materials; Niobium; Resonance; Resonant frequency; Stability; Temperature;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
