A Compact Microstrip Multi-Layer Lowpass Filter Using Triangle Slots Etched in the Ground Plane

Author

Boutejdar, Ahmed ; Elsherbini, Adel ; Omar, A.S.

Author_Institution

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

fYear

2006

fDate

10-15 Sept. 2006

Firstpage

271

Lastpage

274

Abstract

In this paper we present a new concept for implementing cascaded lowpass filters and multi-layer LPF by employing Pi-arrowhead resonators as a defected ground structure (DGS) and as a resonator cell in the upper layer. The effect of the arrowhead area of a DGS on the performance of the conventional LPF is examined. The LPF is designed easily by extracting the equivalent circuit elements of a uniform arrowhead DGS slot and compensating for the capacitance of the transmission line (Boutejdar et al., 2005). The proposed multi-layer LPF is 50% shorter than the conventional LPF. Only two cells of the new structure are necessary to obtain better performance by suppressing ripples and enlarging stopband. The measured results show excellent agreement with simulated and equivalent circuit results

Keywords

band-stop filters; equivalent circuits; low-pass filters; microstrip filters; resonator filters; Pi-arrowhead resonators; cascaded lowpass filters; defected ground structure; equivalent circuit elements; microstrip multilayer lowpass filter; transmission line; triangle slots; Band pass filters; Capacitance; Circuit simulation; Cutoff frequency; Dielectric measurements; Equivalent circuits; Etching; Microstrip filters; Microwave filters; Resonator filters; Defected ground structure (DGS) slot; Multi layer compact lowpass filter; Stopband; compensated microstrip line; exponential function;

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.2006.281290

Filename

4057801