Tunable Bandstop Defected Ground Structure Resonator Using Reconfigurable Dumbbell-Shaped Coplanar Waveguide

Author

Safwat, Amr M E ; Podevin, Florence ; Ferrari, Philippe ; Vilcot, Anne

Author_Institution

Fac. of Eng., Ain Shams Univ., Cairo

Volume

54

Issue

9

fYear

2006

Firstpage

3559

Lastpage

3564

Abstract

A modification of the conventional dumbbell-shaped coplanar waveguide defected ground structure (DGS) is proposed. This modification permits the continuous tuning of the rejected frequencies by using reconfiguration technique and it allows the control of the DGS equivalent-circuit model. The modified DGS possesses two-dimensional symmetry, hence, it has been studied under different symmetry conditions and the corresponding equivalent-circuit model in each case has been developed. Based upon this study, a tunable bandstop DGS resonator is proposed. 19% tuning range centered at 3.7 and 7.4 GHz, respectively, is achieved. The equivalent-circuit model of the resonator is also developed. All proposed structures have been fabricated. Measurements as well as three-dimensional simulations are found to be in a very good agreement with theoretical predictions

Keywords

band-stop filters; coplanar waveguides; resonator filters; 2D symmetry; 3.7 GHz; 7.4 GHz; defected ground structure; equivalent-circuit model; reconfigurable coplanar waveguide; tunable bandstop resonator; Coplanar waveguides; Etching; Filters; Frequency; Microstrip; Periodic structures; Predictive models; Tunable circuits and devices; Tuning; Two dimensional displays; Coplanar waveguide (CPW); defected ground structure (DGS); tunable bandstop resonator;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2006.880654

Filename

1684152