Open AccessDual band stop filter design via frequency transformation and synthesis with lumped resonators
Author(s) -
Yildiz Serkan,
Aksen Ahmet,
Kilinc Sedat,
Yarman Siddik B.
Publication year - 2020
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
eISSN - 1751-8598
pISSN - 1751-858X
DOI - 10.1049/iet-cds.2019.0411
Subject(s) - prototype filter , filter (signal processing) , transformation (genetics) , m derived filter , computer science , low pass filter , filter design , parametric statistics , band stop filter , reactance , electronic engineering , network synthesis filters , multi band device , control theory (sociology) , band pass filter , topology (electrical circuits) , constant k filter , mathematics , engineering , telecommunications , electrical engineering , biochemistry , chemistry , antenna (radio) , gene , statistics , control (management) , voltage , artificial intelligence , computer vision
This study presents a new compact design technique for dual band stop (DBS) filter. Analytical formulation of DBS frequency transformation/mapping is derived in terms of parametric representation of band characteristic of DBS filter. The analytical derivation of the transformation function is based on sequential application of classical low pass to band stop (LP to BS) and low pass to band pass (LP to BP) transformations. Assigned band characteristic of DBS filter can be achieved by applying the proposed transformation function on an LP prototype network. The explicit network topologies for DBS reactance mapping are presented. Several numerical examples are provided to validate the proposed mapping function. An implantation example of DBS filter for GSM900 and GSM1800/UMTS bands is given. Mixed element realisation of the designed filter and measurement results of the design are presented.