Open AccessA Design of Lowpass Filter with High Suppression in Stopband
Author(s) -
Liang Jin,
Xiaojun Li
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1802/2/022089
Subject(s) - stopband , low pass filter , band stop filter , filter (signal processing) , materials science , attenuation , microstrip , transition band , high pass filter , prototype filter , elliptic filter , insertion loss , return loss , m derived filter , electronic engineering , band pass filter , optoelectronics , acoustics , optics , computer science , telecommunications , physics , electrical engineering , engineering , antenna (radio)
Beeline compact microstrip resonance cell (BCMRC) is improved to reduce return loss. A lowpass filter in terahertz band is formed by two improved BCMRC cells and a central microstrip, which make the two cells incorporate into one structure successfully. The filter has widened stopband and high suppression characteristic under the same filter’s order. The optimized result is proposed with an insertion loss of less than 0.4dB in the lowpass band from 0 to 100GHz. The stopband with attenuation more than -20dB is from 140GHz to 350GHz, and the stopband with attenuation more than 40dB is from 158GHz to 312GHz. The size of the low-pass filter is 0.8mm×0.4mm, and this filter can be used in mixer or other devices of terahertz.