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Bandpass filter with stepped impedance subharmonic stubs
Author(s) -
Malherbe J. A. G.,
Mphiwe Christina
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.28758
Subject(s) - band pass filter , stopband , subharmonic , electrical impedance , bandwidth (computing) , electronic engineering , microwave , transmission line , topology (electrical circuits) , engineering , physics , electrical engineering , telecommunications , nonlinear system , quantum mechanics
ABSTRACT Structures with shunt stubs in a subharmonic ratio that realize bandpass performance have limited application due to the inherent problem of fixed transmission zero positions in the stopband. By application of the principle of splitting, the subharmonic stubs into cascades of transmission line sections, structures can be realized that have transmission zeros at arbitrary positions. A bandpass filter employing stepped impedance stubs is developed, and it is shown that moderate bandwidth can be achieved. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:3012–3015, 2014