Open AccessWideband bandpass filter based on ring resonator with high selectivity and multiple transmission zeros
Author(s) -
Zhou J.G.,
Chiang Y.C.,
Che W.Q.
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2013.2908
Subject(s) - wideband , band pass filter , resonator , transmission (telecommunications) , electronic engineering , prototype filter , filter (signal processing) , materials science , computer science , optoelectronics , telecommunications , engineering , low pass filter , electrical engineering
A high‐selectivity wideband bandpass filter consisting of a ring resonator and stepped impedance resonators is proposed. A wideband bandpass filter with multiple transmission poles and transmission zeros is obtained. For demonstration, a prototype operating at the frequency band of 4.14–9.56 GHz (with a fractional bandwidth of 79.1%) is designed and fabricated. Good agreements between the simulated and the measured results have been observed, indicating a very sharp out‐of‐band rejection.