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Design of dual‐band bandpass filter with improved upper stopband using novel stepped‐impedance resonator
Author(s) -
Mashhadi Mostafa,
Komjani Nader
Publication year - 2014
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.28151
Subject(s) - stopband , resonator , band pass filter , band stop filter , microwave , materials science , electrical impedance , helical resonator , electronic engineering , optoelectronics , multi band device , filter (signal processing) , acoustics , electrical engineering , physics , engineering , low pass filter , telecommunications , antenna (radio)
In this letter, a new dual‐band bandpass filter with multispurious suppression is proposed using novel stepped‐impedance resonators (SIRs). The proposed resonator is composed of a SIR with embedded bandstop structure. A third‐order filter is designed and fabricated that shows a rejection level of 30 dB up to 20 GHz (8.33f 1 ). © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:603–606, 2014