A Novel Spurline Bandstop Filter Using Defected Ground and Defected Microstrip Structures

Author

Chao, Chen ; Qun, Wu

Author_Institution

Sch. of Electron. & Inf. Technol., Harbin Inst. of Technol., Harbin

fYear

2008

fDate

10-12 Sept. 2008

Firstpage

75

Lastpage

77

Abstract

In this paper, an improved spurline bandstop filter (BSF) using defected ground structures (DGS) and defected microstrip structures (DMS) is proposed. This method is based on the increment of the slow-wave factor (SWF) when DGS and DMS cells are successfully applied to enhance the out-of-band characteristics of the spurline bandstop filters. By using this method, the proposed filter has a stopband from 3.9 to 5.2 GHz with S₂₁ less than -20 dB and the maximum rejection level of 62 dB.

Keywords

band-stop filters; microstrip filters; microwave filters; transmission lines; defected ground structures; defected microstrip structures; frequency 3.9 GHz to 5.2 GHz; out-of-band characteristics; slow-wave factor; slow-wave structure; spurline bandstop filter; transmission lines; Chaos; Information filtering; Information filters; Microstrip antennas; Microstrip filters; Microstrip resonators; Microwave filters; Periodic structures; Resonant frequency; Spurline; Bandstop filter; DGS; DMS; Spurline;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2008 China-Japan Joint

Conference_Location

Shanghai

Print_ISBN

978-1-4244-3821-1

Type

conf

DOI

10.1109/CJMW.2008.4772379

Filename

4772379