Open AccessCompact QB‐BPF based on single PMR
Author(s) -
Zhu Chuanming,
Xu Jin,
Kang Wei,
Wu Wen
Publication year - 2016
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.2016.2202
Subject(s) - passband , resonator , band pass filter , electrical impedance , coupling (piping) , physics , transmission (telecommunications) , materials science , optoelectronics , multipath propagation , topology (electrical circuits) , acoustics , optics , electrical engineering , engineering , channel (broadcasting) , quantum mechanics , metallurgy
Compact quint‐band bandpass filter (QB‐BPF) based on a novel penta‐mode resonator (PMR) is presented. The first five resonant modes of the proposed PMR can be independently controlled by shorted high‐impedance section of quarter‐wave stepped impedance resonators, and four loaded open stubs resulting in the independency of centre frequencies and quality factors of five passbands. Meanwhile, due to the multipath propagation induced from cross‐coupling, 11 transmission zeros are realised around five passbands, resulting in high passband selectivity. As an example, a QB‐BPF operating at 0.63/1.2/1.8/2.45/3.5 GHz is designed and fabricated. The fabricated QB‐BPF also has a compact size of 0.18 λ g × 0.12 λ g .