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A 2‐pole CPW resonator BPF with attenuation poles using point‐coupled λ/4 resonators
Author(s) -
Wada Kouji,
Tatsumi Makoto,
Kamiyama Tomohide,
Hashimoto Osamu,
Harada Hiroshi
Publication year - 2003
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.11297
Subject(s) - resonator , attenuation , band pass filter , narrowband , microwave , physics , point (geometry) , electronic engineering , waveguide filter , filter (signal processing) , acoustics , engineering , electrical engineering , optoelectronics , telecommunications , prototype filter , filter design , optics , mathematics , geometry
The aim of this study is to examine a coplanar bandpass filter (BPF) with attenuation poles using point‐coupled λ/4 resonators. The first part of this paper describes the resonance characteristics of the λ/4 resonators with chosen excitation methods. Secondly, the design of the BPF with attenuation poles using the λ/4 resonators is carried out based on general filter theory with narrowband approximation. A comparison between theory and experiment is also performed. It is confirmed that the method presented is useful for improving the BPF's skirt characteristics using λ/4 resonators. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 101–107, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11297