Title :
A compact narrow band microstrip bandpass filter with defected ground structure (DGS)
Author :
Kumar, Arjun ; Goodwill, Kumar ; Arya, Ashwini K. ; Kartikeyan, M.V.
Author_Institution :
Dept. of Electron. & Comput. Eng., Indian Inst. of Technol. Roorkee, Roorkee, India
Abstract :
In this paper, a compact narrow band bandpass filter is proposed with hexagonal dumbbell shaped defected ground structure in ground plane of a 50Ω microstrip line and a closed loop resonator in the conducting strip. This arrangement provides better coupling in pass band. Using DGS structure, forward transmission loss (S21) is -0.5 dB and return loss (S11) is -26.7 dB at the centre frequency 5.4 GHz with narrow bandwidth of 500 MHz. A conventional parallel coupled line bandpass filter has also been implemented with exactly same design goals for the sake of comparison. The proposed bandpass filter with DGS is quite promising with 60% size reduction.
Keywords :
band-pass filters; defected ground structures; microstrip filters; microstrip lines; bandwidth 500 MHz; closed loop resonator; compact narrow band microstrip bandpass filter; conducting strip; frequency 5.4 GHz; hexagonal dumbbell shaped defected ground structure; microstrip line; parallel coupled line bandpass filter; resistance 50 ohm; Band pass filters; Microstrip filters; Microwave circuits; Microwave filters; Microwave photonics; Resonator filters; Bandpass Filters; DGS;
Conference_Titel :
Communications (NCC), 2012 National Conference on
Conference_Location :
Kharagpur
Print_ISBN :
978-1-4673-0815-1
DOI :
10.1109/NCC.2012.6176815
