Compact Wideband Bandpass Filters With Wide Upper Stopband

Author

Mondal, Priyanka ; Chakrabarty, Ajay

Author_Institution

Dept. of Electron. & Electr. Commun. Eng., Indian Inst. of Technol., Kharagpur

Volume

17

Issue

1

fYear

2007

Firstpage

31

Lastpage

33

Abstract

In this letter, a T-shaped microstrip feeding arrangement is proposed to design wideband bandpass filter (BPF) using shorted slot-line resonators. This feed line produces frequency selective external coupling which is utilized to suppress unwanted harmonics. Up to sixth order harmonics are suppressed. Other advantages are low passband group delay variation, ease of fabrication, low insertion loss (IL), and compact size. A fabricated BPF of fractional bandwidth 56.3% at midband frequency 2.3 GHz has a maximum IL of 1.2 dB in its passband and 30-dB upper stopband extends over 11.53 GHz

Keywords

band-pass filters; frequency selective surfaces; interference suppression; microstrip lines; strip line resonators; 2.3 GHz; T-shaped microstrip feeding arrangement; compact wideband bandpass filters; frequency selective external coupling; low passband group delay variation; microstrip line; slot-line resonators; unwanted harmonic suppression; wide upper stopband; Band pass filters; Delay; Fabrication; Feeds; Frequency; Microstrip filters; Microstrip resonators; Passband; Power harmonic filters; Wideband; Bandpass filter (BPF); harmonic suppression; microstrip line; slot-line; slot-line resonators (SLRs);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2006.887247

Filename

4052380