DocumentCode
1335982
Title
DGS embedded transformed radial stub for ultra-wide stopband lowpass filter
Author
Xu, Songcen ; Ma, Kwan-Liu ; Meng, Fanman ; Yeo, Kiat Seng
Author_Institution
Sch. of EEE, Div. of Circuits & Syst., Nanyang Technol. Univ., Singapore, Singapore
Volume
48
Issue
23
fYear
2012
Firstpage
1473
Lastpage
1475
Abstract
A novel lowpass filter (LPF) with a wide stopband by using defected ground structures (DGSs) and a transformed radial stub (TRS) in combination is proposed. The characteristics of DGS cells are investigated and the DGS embedded TRS LPFs are designed and verified by experiment. The designed DGS embedded TRS LPF demonstrates a passband insertion loss of less than 1dB, a cutoff frequency (fc) of 2.5GHz, a wide stopband with more than 16dB rejection up to 14fc, a passband return loss of better than 18dB and a compact size of 0.26λg×0.167×g (λg is the guided wavelength at the cutoff frequency).
Keywords
band-pass filters; band-stop filters; defected ground structures; low-pass filters; DGS cells; DGS embedded transformed radial stub; defected ground structures; passband insertion loss; passband return loss; ultra-wide stopband lowpass filter;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el.2012.2568
Filename
6354236
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