Harmonic-suppressed Elliptic-Function Low-pass Filter Using Defected Ground Structure

Author

Qi, Yujie ; Liu, Xueguan

Author_Institution

Soochow Univ., Suzhou

fYear

2007

fDate

16-17 Aug. 2007

Firstpage

419

Lastpage

422

Abstract

In this paper, a new microstrip elliptic-function low-pass filter(LPF) using a defected ground structure(DGS) is proposed. By integrating DGS units, the proposed filter provides attenuation- pole for the widc-stopband characteristic due to the resonance characteristic of DGS. The equivalent-circuit model and the 3-D model simulation for the DGS are used to determine the dimension parameters. Etching the designed DGS on the backside of an interdigital elliptic-function LPF, a new microstrip LPF with broad stopband is obtained after- impedance matching. The experimental results show the new filter can suppress the harmonic signal very well.

Keywords

elliptic filters; equivalent circuits; harmonics suppression; low-pass filters; microstrip filters; defected ground structure; elliptic-function low-pass filter; equivalent-circuit model; harmonic-suppressed filter; interdigital elliptic-function; microstrip low-pass filter; Antennas and propagation; Cutoff frequency; Electromagnetic compatibility; Etching; Low pass filters; Microstrip filters; Microwave antennas; Microwave propagation; Passband; Power harmonic filters; Directed ground structure(DGS); Distributed elements; Elliptic-function filter; Low-pass filter;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2007 International Symposium on

Conference_Location

Hangzhou

Print_ISBN

978-1-4244-1045-3

Electronic_ISBN

978-1-4244-1045-3

Type

conf

DOI

10.1109/MAPE.2007.4393639

Filename

4393639