Compact dual-wideband bandstop filters based on open-coupled lines and transversal signal-interaction concepts

Author

Feng, W.J. ; Che, W.Q. ; Shi, Suyang Y. ; Quan Xue

Author_Institution

Dept. of Commun. Eng., Nanjing Univ. of Sci. & Technol., Nanjing, China

Volume

7

Issue

2

fYear

2013

fDate

January 29 2013

Firstpage

92

Lastpage

97

Abstract

Two compact dual-wideband bandstop filters based on open-coupled lines and transversal signal-interaction concepts are proposed in this study. Two transmission paths with a half-wavelength open stub and two open-coupled lines are used to realise two wide stopbands for WLAN bands. Second/third-order stopbands with transmission poles near each stopband can be easily achieved by the two transmission paths. Two planar dual-wideband bandstop filters with 10 dB fractional bandwidths of 40 and 18.2, 61 and 26.8% are 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; poles and zeros; wireless LAN; WLAN bands; in-band filtering performance; open stub; open-coupled lines; planar dual-wideband bandstop filters; transmission paths; transmission poles; transversal signal-interaction concept;

fLanguage

English

Journal_Title

Microwaves, Antennas & Propagation, IET

Publisher

iet

ISSN

1751-8725

Type

jour

DOI

10.1049/iet-map.2012.0555

Filename

6518489