A new Defected ground Structure with bandstop filter characteristics

Author

Kumar Parui, Susanta ; Moyra, Tamosi ; Das, Santanu

Author_Institution

Bengal Eng. & Sci. Univ., Shibpur

fYear

2009

fDate

2-4 March 2009

Firstpage

1

Lastpage

4

Abstract

In this paper, a new asymmetric type Defected ground Structure (DGS) is investigated. The proposed DGS unit comprising of three numbers of square shaped slots separated from each other by same distance connect a rectangular slot by thin meander slots underneath a microstrip line. In its frequency characteristics, a finite attenuation zero is observed near to its attenuation pole frequency. The investigated unit is modeled by a Causer Pi-network consisting of a series resonant and a shunt resonant circuit. For a given dimension of the DGS, the equivalent LC parameters are extracted. The investigated DGS exhibits a sharp and deep bandstop filtering characteristics. The size of the DGS is very compact as the overall cutout area is 0.3 lambdag X 0.18 lambdag.

Keywords

band-stop filters; microstrip lines; slot lines; Causer Pi-network; attenuation pole frequency; bandstop filter; defected ground structure; equivalent LC parameters; finite attenuation zero; microstrip line; rectangular slot; series resonant circuit; shunt resonant circuit; square shaped slots; thin meander slots; Attenuation; Band pass filters; Etching; Filtering; Frequency; Microstrip; Poles and zeros; RLC circuits; Resonance; Strips;

fLanguage

English

Publisher

ieee

Conference_Titel

Antenna Technology, 2009. iWAT 2009. IEEE International Workshop on

Conference_Location

Santa Monica, CA

Print_ISBN

978-1-4244-4395-6

Electronic_ISBN

978-1-4244-4396-3

Type

conf

DOI

10.1109/IWAT.2009.4906882

Filename

4906882