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Synthesis and realization of ultra‐wideband bandpass filters using the Z ‐transform technique
Author(s) -
Cai Peng,
Ma Zhewang,
Guan Xuehui,
Anada Tetsuo,
Hagiwara Gen
Publication year - 2006
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21677
Subject(s) - band pass filter , electronic engineering , microstrip , microwave , transfer function , engineering , filter (signal processing) , realization (probability) , wideband , prototype filter , topology (electrical circuits) , electrical engineering , computer science , filter design , telecommunications , mathematics , statistics
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