Design of Compact Microstrip Lowpass Filters Using a U-Shaped Defected Ground Structure and Compensated Microstrip Line

Author

Boutejdar, A. ; Ramadan, A. ; Makkey, M. ; Omar, A.S.

Author_Institution

Chair of Microwave & Commun. Eng., Magdeburg Univ.

fYear

2006

fDate

10-15 Sept. 2006

Firstpage

267

Lastpage

270

Abstract

A compact microstrip lowpass filter using a U-shaped defected ground structure (DGS) with compensated microstrip is proposed in the paper. The equivalent circuit for the proposed U-shaped DGS and its corresponding L-C parameters are extracted by using its S-parameters response and a simple circuit analysis method. The lowpass filter using three cascaded U-S DGS provides a compact size, very good transition sharpness with low insertion loss in passband and wide rejection in the stopband. Measured results show good agreement with the theoretical results

Keywords

S-parameters; equivalent circuits; low-pass filters; microstrip lines; microstrip resonators; S-parameters; defected ground structure; equivalent circuit; insertion loss; microstrip line; microstrip lowpass filters; reject band; transition response; Attenuation; Band pass filters; Cutoff frequency; Design engineering; Microstrip filters; Microwave communication; Microwave filters; Power harmonic filters; Resonator filters; Scattering parameters; Defected ground Structure; U-Microstrip resonator; lowpass filter; reject band; sharp transition response;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2006. 36th European

Conference_Location

Manchester

Print_ISBN

2-9600551-6-0

Type

conf

DOI

10.1109/EUMC.2006.281289

Filename

4057800