Title :
Compact dual-wideband bandstop filter based on transversal signal-interference concept
Author :
Wenjie Feng ; Wenquan Che ; Suyang Shi ; Jiagen Zhou
Author_Institution :
Dept. of Commun. Eng., Nanjing Univ. of Sci. & Technol., Nanjing, China
Abstract :
A compact dual-wideband bandstop filter based on transversal signal-interference concept is proposed in this paper. Two transmission paths with a half-wavelength open stub and two open coupled lines are used to realize two wide stopbands for WLAN bands. Second-order stopband with two transmission poles near each stopband can be easily realized by the two transmission paths. A planar dual-wideband bandstop filter with 3-dB fractional bandwidths of 54.2% and 23.6% is designed and fabricated. The theoretical and measured results are in good agreement and show good in-band filtering performance and high selectivity.
Keywords :
band-stop filters; radiofrequency interference; wireless LAN; WLAN bands; compact dual-wideband bandstop filter; half-wavelength open stub; open coupled lines; planar dual-wideband bandstop filter; second-order stopband; transmission paths; transmission poles; transversal signal-interference concept; Band pass filters; Bandwidth; Filtering theory; Microwave filters; Power harmonic filters; Resonator filters; Transversal filters; Dual-wideband; bandstop filter; fractional bandwidth; open stub;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2012 Asia-Pacific
Conference_Location :
Kaohsiung
Print_ISBN :
978-1-4577-1330-9
Electronic_ISBN :
978-1-4577-1331-6
DOI :
10.1109/APMC.2012.6421645
