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A bandpass filter using dielectric coaxial resonators with a temperature-stable stepped-impedance structure

✍ Scribed by Sang-Kyu Lim; Duck-Whan Kim; Han-Young Lee; Chul An

Book ID
102518148
Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
97 KB
Volume
35
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

In this paper, a bandpass filter using stepped‐impedance coaxial resonators is presented. Each stepped‐impedance resonator (SIR) is composed of ceramic/material to ensure temperature stability of the resonant frequency; one has a positive temperature coefficient of resonant frequency (τ~f~), and the other has a negative τ~f~. A capacitively coupled three‐pole bandpass filter is designed and fabricated to have a center frequency of 915 MHz and a passband bandwidth of 20 MHz. The improved temperature stability of this filter is demonstrated by experimental results. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 508–510, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10651

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