Dual-band bandpass filter using quarter-wavelength resonator with controllable bandwidths and good selectivity

Author

MinhTan Doan ; Wenquan Che

Author_Institution

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

fYear

2011

fDate

2-4 Aug. 2011

Firstpage

199

Lastpage

202

Abstract

A compact microstrip dual-band bandpass filter (BPF) using quarter-wavelength resonator is proposed in this paper. By tuning the length and width of quarter-wavelength line, two center frequencies can be easily adjusted to the desired value. Furthermore, new structure of couple-line is introduced to produce five transmission zeroes (TZ) at the adjacent two passbands. Thus, the bandwidths of this filter are controllable and good selectivity. Two passbands are designed to operate at 2.4 GHz and 3.5 GHz, respectively. A prototype of dual-band bandpass filter is designed and fabricated for demonstration, good agreement is observed between the simulation and experiments.

Keywords

band-pass filters; microstrip filters; microstrip resonators; couple line; dual-band bandpass filter; frequency 2.4 GHz to 3.5 GHz; microstrip filter; quarter wavelength resonator; quarter-wavelength line; transmission zeroes; Band pass filters; Dual band; Layout; Resonant frequency; Substrates;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Technologies for Communications (ATC), 2011 International Conference on

Conference_Location

Da Nang

ISSN

2162-1020

Print_ISBN

978-1-4577-1206-7

Type

conf

DOI

10.1109/ATC.2011.6027466

Filename

6027466