Stepped-Impedance Defected Ground Structure

Author

Karmakar, Nemai C. ; Li Ling, Rita Lim

Author_Institution

Dept. of Electr. & Comput. Syst. Eng., Monash Univ., Clayton, VIC

fYear

2005

fDate

21-24 Nov. 2005

Firstpage

1

Lastpage

6

Abstract

The negative image of a microstrip stepped-impedance lowpass filter (LPF) or hi-Z, low-Z filter is used on the ground plane to produce wide and deep stopband. This structure is simpler in design and more compact in size compared to conventional bandstop structures. The simulation and measured results show good agreement in 2.6 GHz 20-dB rejection bandwidth at 4 GHz center frequency. This distinct stopband characteristic can be applied to devices such as filters, antennas and coplanar waveguide to suppress harmonics and enhance performances such as better gain and isolation.

Keywords

band-stop filters; coplanar waveguides; low-pass filters; microstrip filters; bandstop structures; coplanar waveguide; deep stopband; hi-Z filter; low-Z filter; microstrip stepped-impedance lowpass filter; rejection bandwidth; stepped-impedance defected ground structure; Band pass filters; Cutoff frequency; Dielectric substrates; Electromagnetic waveguides; Metamaterials; Microstrip antenna arrays; Microstrip antennas; Microstrip filters; Patch antennas; Periodic structures; Defected ground structure; bandstop filter; electromagnetic bandgap; frequency spectrum; high impedance surface; lowpass filter; photonic bandgap;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2005 2005 IEEE Region 10

Conference_Location

Melbourne, Qld.

Print_ISBN

0-7803-9311-2

Electronic_ISBN

0-7803-9312-0

Type

conf

DOI

10.1109/TENCON.2005.300913

Filename

4085197