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High selectivity balanced filters with multiple transmission zeros using ring resonators with loaded stubs
Author(s) -
Deng Kuan,
Chen Zhengyu,
Feng Wenjie
Publication year - 2018
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21174
Subject(s) - passband , resonator , selectivity , frequency selectivity , transmission (telecommunications) , ring (chemistry) , mode (computer interface) , differential (mechanical device) , physics , control theory (sociology) , topology (electrical circuits) , mathematics , electronic engineering , band pass filter , computer science , optoelectronics , optics , telecommunications , engineering , chemistry , organic chemistry , biochemistry , control (management) , combinatorics , artificial intelligence , thermodynamics , operating system , catalysis
In this article, two high selectivity balanced filters with multiple transmission zeros using ring resonators are proposed. Four, and six transmission zeros are easily realized to improve the differential mode passband selectivity and common mode suppression. Over five octaves common mode suppression can be realized by the bandstop performance of the coupled lines and stubs. Two balanced filters with 3‐dB bandwidths of 23.6 and 23.5% are designed and measured. Good agreement can be found between the theoretical and measured results.