Open AccessCompact microstrip lowpass filter with sharp roll‐off using radial resonator
Author(s) -
Hayati M.,
Naderi S.,
Jafari F.
Publication year - 2014
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.2014.0648
Subject(s) - microstrip , resonator , low pass filter , acoustics , filter (signal processing) , band pass filter , physics , electronic engineering , electrical engineering , optics , engineering
A compact microstrip lowpass filter (LPF) with sharp roll‐off is presented. The proposed filter consists of radial resonator, triangular patch and open stub. The proposed filter has good specifications such as low insertion loss <0.1 dB, high return loss of −20 dB, wide stopband from 4.37 to 19 GHz with −20 dB attenuation level and compact size. The LPF filter has a cut‐off frequency of 3 dB at 4.24 GHz and a high roll‐off rate of 130.7 and finally a high figure‐of‐merit of 23526.