Novel Dual-Band Filter Incorporating Defected SIR and Microstrip SIR

Author

Wu, Bian ; Liang, Chang-Hong ; Li, Qi ; Qin, Pei-Yuan

Author_Institution

Nat. Key Lab. of Antennas & Microwave Technol., Xidian Univ., Xi´´an

Volume

18

Issue

6

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

392

Lastpage

394

Abstract

This letter presents a novel approach to design dual-band bandpass filter by using defected stepped impedance resonator (DSIR) and microstrip stepped impedance resonator (MSIR). A pair of MSIRs on the upper plane forms a cross coupled filtering passage, and a pair of DSIRs at the lower plane constructs a linear phase filtering passage. Both of them are fed by a common T-shaped microstrip feed line with source-load coupling. Then they are directly combined to construct a compact dual-band filter with two passbands centering at 2.35 GHz and 3.15 GHz, respectively. The measurement results agree well with the full-wave electromagnetic designed responses.

Keywords

band-pass filters; microstrip lines; microstrip resonators; microwave filters; T-shaped microstrip feed line; cross coupled filtering passage; defected stepped impedance resonator; dual-band bandpass filter; frequency 2.35 GHz; frequency 3.15 GHz; linear phase filtering passage; microstrip stepped impedance resonator; source-load coupling; Bandpass filter (BPF); defected stepped impedance resonator (DSIR); dual-band; microstrip stepped impedance resonator (MSIR);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2008.922614

Filename

4530749