Open AccessA compact lowpass/dual-band bandpass filter for microwave application
Author(s) -
Priyanshu Sadwal,
Amit Bage
Publication year - 2021
Publication title -
facta universitatis. series electronics and energetics/facta universitatis. series: electronics and energetics
Language(s) - English
Resource type - Journals
eISSN - 2217-5997
pISSN - 0353-3670
DOI - 10.2298/fuee2102281s
Subject(s) - passband , high pass filter , low pass filter , band pass filter , voltage controlled filter , butterworth filter , elliptic filter , prototype filter , cutoff frequency , filter (signal processing) , m derived filter , band stop filter , physics , electronic engineering , acoustics , optics , engineering , electrical engineering
A combination of lowpass and dual band bandpass filter with improved selectivity is presented in this manuscript. Two circular split ring resonators which are connected at the upper side, provide a lowpass filter characteristics. In order to achieve combined lowpass with dual passband response two L-shape stubs are incorporated into the lowpass filter structure. The parametric analysis of the proposed filter has been carried out using CST microwave studio. The numerical result shows a 3-dB cutoff frequency for lowpass at 1.22 GHz, first and second passband resonant frequencies are 2.44 GHz and 3.7 GHz respectively. The proposed filter is compact and overall size of the proposed filter is 32.9 mm?15mm.