Open AccessCompact microstrip broadband filter using multimode stub‐loaded resonator
Author(s) -
Chen C.F.,
Lin C.Y.,
Weng J.H.,
Tsai K.L.
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2012.4437
Subject(s) - resonator , stub (electronics) , passband , broadband , microstrip , helical resonator , band pass filter , multi mode optical fiber , materials science , electronic engineering , dielectric resonator antenna , acoustics , waveguide filter , optoelectronics , optics , prototype filter , bandwidth (computing) , physics , telecommunications , low pass filter , computer science , engineering , optical fiber
A new compact microstrip broadband filter based on the multimode stub‐loaded resonator is investigated. A third‐order bandpass response can be realised by properly incorporating the first three resonator modes of the proposed resonator at distant frequencies into the passband. Thus, the filter can be designed with only one resonator, resulting in an extremely small size. For demonstration, a compact broadband filter with a size of 0.5λ g by 0.07λ g has been designed and fabricated. Good agreement is achieved between simulation and measurement.