A design of the low-pass filter using the novel microstrip defected ground structure

Author

Ahn, Dal ; Park, Jun-Seok ; Kim, Chul-Soo ; Kim, Juno ; Qian, Yongxi ; Itoh, Tatsuo

Author_Institution

Sch. of Electr. & Electron. Eng., Soonchunhyang Univ., Asan, South Korea

Volume

49

Issue

1

fYear

2001

fDate

1/1/2001 12:00:00 AM

Firstpage

86

Lastpage

93

Abstract

A new defected ground structure (DGS) for the microstrip line is proposed in this paper. The proposed DGS unit structure can provide the bandgap characteristic in some frequency bands with only one or more unit lattices. The equivalent circuit for the proposed defected ground unit structure is derived by means of three-dimensional field analysis methods. The equivalent-circuit parameters are extracted by using a simple circuit analysis method. By employing the extracted parameters and circuit analysis theory, the bandgap effect for the provided defected ground unit structure can be explained. By using the derived and extracted equivalent circuit and parameters, the low-pass filters are designed and implemented. The experimental results show excellent agreement with theoretical results and the validity of the modeling method for the proposed defected ground unit structure

Keywords

equivalent circuits; linear network analysis; linear network synthesis; low-pass filters; microstrip filters; microwave filters; passive filters; 3D field analysis methods; bandgap characteristic; circuit analysis method; circuit parameters extraction; defected ground unit structure; equivalent circuit; low-pass filter design; microstrip defected ground structure; microstrip line; Circuit analysis; Equivalent circuits; Etching; Frequency; Lattices; Low pass filters; Magnetic circuits; Microstrip filters; Periodic structures; Photonic band gap;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.899965

Filename

899965