Development of new miniaturised bandpass filter having ultrawide bandwidth

Author

Nguyen, Cam

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX

Volume

30

Issue

10

fYear

1994

fDate

5/12/1994 12:00:00 AM

Firstpage

767

Lastpage

768

Abstract

A new, compact, very-broadband bandpass filter, consisting of two-parallel-conductor short-circuited spurline resonators, quarter-wavelength long, is described. Approximate design formulas for the filter are derived. The chain matrix of the resonators is also obtained and used in predicting the filter response. It is found that this filter possesses a very wide bandwidth, more than 5:1. A microstrip filter having a passband from 1.8 to 9.2 GHz has been designed and tested with less than 1 dB insertion loss. There is also a reasonably good agreement between the experimental and theoretical performances. The developed filter is very attractive for wideband microwave integrated circuits due to its compactness and very wide bandwidth

Keywords

band-pass filters; distributed parameter networks; linear network synthesis; microstrip components; microwave filters; microwave integrated circuits; passive filters; resonators; 1.8 to 9.2 GHz; chain matrix; design formulas; filter response; microstrip filter; miniaturised bandpass filter; quarter-wavelength long; short-circuited spurline resonators; two-parallel-conductor; ultrawide bandwidth; very-broadband filter; wideband MIC application; wideband microwave integrated circuits;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:19940517

Filename

289215