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Sharp‐rejection dual‐band bandstop filter based on signal interaction with three paths
Author(s) -
Chu QingXin,
Qiu Leilei
Publication year - 2015
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.28923
Subject(s) - band stop filter , multi band device , dual (grammatical number) , signal (programming language) , electronic engineering , filter (signal processing) , computer science , physics , topology (electrical circuits) , telecommunications , electrical engineering , engineering , low pass filter , philosophy , antenna (radio) , linguistics , programming language
ABSTRACT A sharp‐rejection dual‐band bandstop filter using transversal signal‐interaction with three paths, consisting of a transmission line path and two coupled paths, is proposed. By tuning the coupling coefficient and odd‐mode impedance of the coupled lines, the center frequency ratio and bandwidth can be controlled, respectively, and the transmission line impedance is used to allocate the transmission poles to sharp the attenuation rate. A compact dual‐band bandstop filter prototype is designed and fabricated. The simulation and measurement results agree well. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:657–660, 2015