Open AccessTriple mode spiral wideband bandpass filter using symmetric dual‐line coupling
Author(s) -
Lalbakhsh A.,
Karimi G.,
Sabaghi F.
Publication year - 2017
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.2016.4447
Subject(s) - band pass filter , passband , wideband , bandwidth (computing) , resonator , spiral (railway) , electronic engineering , prototype filter , coupling (piping) , acoustics , fractional bandwidth , physics , optics , engineering , telecommunications , low pass filter , mechanical engineering
A compact wideband bandpass filter at the centre frequency of 5.77 GHz with 78% fractional bandwidth is presented. An especial coupling structure along with a novel triple mode spiral resonator designed based on modal analysis is used to provide a flat wide passband with excellent skirt characteristics. To verify the efficiency of the filter, a prototype is fabricated, tested and compared with some of the most recent works.