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Design of a novel V-band coplanar waveguide low-pass filter based on defected ground structures

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5 Author(s)
Mingming Xu ; Lab. of Microwave Commun. & Electron. Syst., Beijing Inst. of Technol., Beijing, China ; Weihua Yu ; Hong Deng ; Jinchao Mou
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This paper presents a novel V-band coplanar waveguide low pass filter based on defected ground structure (DGS) cells. The proposed DGS cell provides low-pass characteristic whose cutoff frequency could be changed by tuning its dimensions. To realize a low pass filter with excellent rejection in the stop-band, several DGS cells with different sizes are cascaded together. Gallium arsenide is adopted to be the substrate of the low-pass filter with the cutoff frequency located in the V band. By optimization, a low-pass filter with the cutoff frequency of 60 GHz is designed, whose insertion loss in the pass band is less than 0.2 dB and the rejection in the stop-band is better than 25 dB from 65 GHz to 100 GHz.

Published in:

Microwave Technology & Computational Electromagnetics (ICMTCE), 2011 IEEE International Conference on

Date of Conference:

22-25 May 2011