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A Compact Dual‐Passband Filter Using Stepped‐Impedance Resonators
Author(s) -
Tsai LinChuan
Publication year - 2013
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.27871
Subject(s) - passband , resonator , coupling (piping) , electrical impedance , filter (signal processing) , microwave , acoustics , band pass filter , band stop filter , electronic engineering , physics , engineering , low pass filter , optics , electrical engineering , telecommunications , mechanical engineering
ABSTRACT In this letter, a new coupling configuration of the stepped‐impedance resonator (SIR) has been presented to design dual‐passband filters with the small circuit size. We design the filter with higher selectivity based on SIR direct‐coupling, input, and output external quality factors. Through resonance characteristics of a SIR, the second resonant frequency can be tuned by adjusting structure parameters. The agreement between measured results and full‐wave simulation prediction validates the feasible configuration of the proposed filters. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2514–2517, 2013