Open AccessDifferential‐mode bandpass filter on microstrip line with wideband common‐mode suppression
Author(s) -
Chen Dong,
Zhu Lei,
Bu Huizheng,
Cheng Chonghu
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.2016.4223
Subject(s) - band pass filter , passband , microstrip , wideband , stub (electronics) , resonator , common mode signal , topology (electrical circuits) , physics , electronic engineering , spurious relationship , acoustics , computer science , optoelectronics , optics , engineering , electrical engineering , digital signal processing , machine learning , analog signal
A novel differential‐mode (DM) bandpass filter (BPF) on microstrip‐line topology with wideband common‐mode (CM) suppression is presented. The DM BPF is composed of a pair of half‐wavelength ( λ /2) uniform impedance resonators and two coupled‐line sections as feeding scheme. By installing an open‐circuited stub in the middle of the coupled‐line section, spurious CM response can be tremendously suppressed over a wide band. Thus, wideband CM suppression is realised in and beyond core DM passband. Finally, a DM BPF is designed and fabricated to support the proposed design concept.