Open AccessDesign of microstrip wide stopband lowpass filter with lumped equivalent circuit
Author(s) -
Sheikhi A.,
Alipour A.,
Hemesi H.
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.2017.1715
Subject(s) - stopband , insertion loss , low pass filter , return loss , microstrip , attenuation , materials science , transition band , bandwidth (computing) , passband , elliptic filter , electronic engineering , acoustics , prototype filter , resonator , band pass filter , physics , optics , optoelectronics , telecommunications , computer science , engineering , antenna (radio)
A microstrip lowpass filter using stepped impedance resonator hexangular unit is presented. The proposed lowpass filter (LPF) has some appropriate features such as compact size, low insertion loss and wide stopband. The LPF has cut‐off frequency at 2.8 GHz and stopband bandwidth from 3.15 up to 25.5 GHz with attenuation level better than −20 dB. Also, it has in‐band insertion loss <0.1 dB and return loss better than 16.5 dB. Simulated and measured results are presented and relatively good agreement between them has been obtained.