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Fabrication of monoblock ceramic bandpass filters with attenuation poles

✍ Scribed by Min-Hung Weng; Tsorng-Juu Liang

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
176 KB
Volume
32
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

Small size and rapid attenuation rate are two important factors in the selection of bandpass filters for practical applications. This paper describes a monoblock and modified Chebyshev‐type bandpass filter with an attenuation pole in the lower stopband. The equivalent circuit consists of resonators, and series capacitance is presented to predict the filter performance. The series capacitance is made directly by an appropriate choice of the electrode pattern. Since no additional lumped element is needed, the designed filter shows a simple structure. Also, a compact monoblock bandpass filter using high‐permittivity ceramics of (Ba,Sr)O–Sm~2~O~3~–4.7TiO~2~ is fabricated. Experimental results of the fabricated filter measured by an HP8510B network analyzer verify the expected effect. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 32: 400–402, 2002.

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