Open AccessBroadband bandpass filter with wide upper stopband using stub‐loaded multiple‐mode resonators
Author(s) -
Li F.,
Che W.Q.,
Gu L.M.,
Xue Q.
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2013.1609
Subject(s) - stopband , stub (electronics) , resonator , band pass filter , broadband , transition band , materials science , passband , acoustics , wideband , attenuation , elliptic filter , prototype filter , electronic engineering , bandwidth (computing) , optoelectronics , optics , physics , low pass filter , computer science , engineering , telecommunications
A compact wideband filter with a wide upper stopband using stub‐loaded multiple‐mode resonators is designed. The multimode behaviour and characteristics of the proposed filter structure are studied by conventional natural modes analysis. A prototype is designed and fabricated at 1 GHz ( f 0 ) with 3 dB fractional bandwidths 102% and 20 dB stopband attenuation up to 10.75 f 0 . Good agreement between simulations and experiments is observed.