Dual electromagnetic bandgap CPW structures for filter applications

Author

Martín, Ferran ; Falcone, Francisco ; Bonache, Jordi ; Lopetegi, Txema ; Laso, Miguel A G ; Sorolla, Mario

Author_Institution

Departament d´´Enginyeria Electronica, Univ. Autonoma de Barcelona, Spain

Volume

13

Issue

9

fYear

2003

Firstpage

393

Lastpage

395

Abstract

A novel coplanar waveguide (CPW) low pass filter based on electromagnetic bandgaps (EBG) with double periodicity has been designed and fabricated. The device consists on a CPW with T-shaped loading capacitances at periodic positions and slot width modulation. By properly choosing the ratio between the two periods of the structure, a huge band gap (more than five times the bandwidth) is obtained through the suppression of spurious frequencies. The fabricated prototypes also exhibit very sharp cutoff, very low insertion loss in the passband and slow wave effect.

Keywords

coplanar waveguide components; low-pass filters; microwave filters; periodic structures; slow wave structures; T-shaped filter; double periodic structure; dual electromagnetic bandgap CPW filter; insertion loss; loading capacitance; microwave low-pass filter; slot width modulation; slow wave effect; Band pass filters; Bandwidth; Capacitance; Coplanar waveguides; Electromagnetic waveguides; Frequency; Low pass filters; Metamaterials; Periodic structures; Photonic band gap;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2003.817149

Filename

1232557