Quad-band bandpass filter design by embedding dual-band bandpass filter with dual-mode notch elements

Author

Chenwei Cui ; Yun Liu

Author_Institution

Key Lab. of Radar Imaging & Microwave Photonics, Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China

Volume

50

Issue

23

fYear

2014

fDate

11 6 2014

Firstpage

1719

Lastpage

1720

Abstract

A quad-band bandpass filter of compact dimensions by embedding several dual-mode notch elements into a stub-type dual-band bandpass filter is presented, and the four passbands are achieved by splitting the two passbands of the dual-band bandpass filter with two notch bands generated by the dual-mode notch elements. A prototype filter with passbands located at 1.4-1.7, 2.1-2.3, 3.3-3.6 and 5.2-5.4 GHz is designed with the help of optimisation methods. Good agreement between simulations and measurements are achieved, demonstrating good features such as controllable and wide bandwidths, higher filter order, compact dimensions and high isolations.

Keywords

UHF filters; band-pass filters; microwave filters; optimisation; QBF; dual-mode notch elements; filter order; frequency 1.4 GHz to 1.7 GHz; frequency 2.1 GHz to 2.3 GHz; frequency 3.3 GHz to 3.6 GHz; frequency 5.2 GHz to 5.4 GHz; optimisation methods; quad-band bandpass filter design; stub-type dual-band filter;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2014.2732

Filename

6955055