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A compact microstrip bandpass filter using folded parallel‐coupled‐lines
Author(s) -
Gu JianZhong,
Sun XiaoWei
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.21949
Subject(s) - band pass filter , microstrip , offset (computer science) , microwave , filter (signal processing) , passband , materials science , optoelectronics , electronic engineering , physics , engineering , topology (electrical circuits) , electrical engineering , computer science , telecommunications , programming language
A bandpass filter using spiral parallel‐coupled‐lines is presented for size reduction. Based on the conventional parallel‐coupled‐line structures, different folded number and coupling structures are proposed for comparison. The band‐pass filter with three cells in series is constructed operating from 1.8 GHz to 2.5 GHz. The upper stop‐band suppression at 200 MHz offset is more than 30 dB. The band‐pass filter size is 70% smaller. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 2328–2330, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21949