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Synthesis and realization of ultra-wideband bandpass filters using the Z-transform technique

✍ Scribed by Peng Cai; Zhewang Ma; Xuehui Guan; Tetsuo Anada; Gen Hagiwara

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
301 KB
Volume
48
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

A modified synthesis theory using the Z‐transform technique is presented to design and realize ultra‐wideband (UWB) bandpass filters. Instead of using a system function based on lumped‐element prototypes, a transfer function based on distributed transmission lines is employed to synthesize the filter. In order to get sharp attenuations of the filter, shunt two‐section open‐circuited stubs are employed to produce transmission zeros. A 3° UWB filter is designed and implemented in the form of microstrip lines, and the measured characteristics show good agreement with the theoretical results. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1398–1401, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21677

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