Open AccessCompact tri‐band bandpass filter using SISRLR
Author(s) -
Liu Shuai,
Xu Jun
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.2016.2171
Subject(s) - band pass filter , resonator , electrical impedance , microwave , electronic engineering , square (algebra) , split ring resonator , helical resonator , optoelectronics , materials science , electrical engineering , acoustics , physics , computer science , engineering , telecommunications , mathematics , geometry
A novel tri‐band bandpass filter (BPF) using a stepped‐impedance square ring loaded resonator (SISRLR) is presented. The proposed resonator consists of a square ring with two open stubs and two short stubs. By tuning the impedance ratios of the SISRLR, the passbands can be adjusted and three pairs of transmission poles are produced for tri‐band design. On the basis of the resonator, a miniaturised tri‐band BPF operating at 1.7 GHz (mobile communication), 3.5 GHz (worldwide interoperability for microwave access application), and 5.8 GHz (WLAN application) has been designed and fabricated. Measured results demonstrate good agreement with simulations.