A Novel simple Wideband Common-Mode Suppression Filter

Zhibin Zeng; Yiqi Zhuang; Zengning Shen; Yindi Yao; Xin Xiang

doi:10.1587/elex.11.20140582

This article has now been updated. Please use the final version.

A Novel simple Wideband Common-Mode Suppression Filter

Zhibin Zeng, Yiqi Zhuang, Zengning Shen, Yindi Yao, Xin Xiang

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Keywords: defected ground structure, common-mode filter, difference circuit, insertion loss

JOURNAL FREE ACCESS Advance online publication

Article ID: 11.20140582

DOI https://doi.org/10.1587/elex.11.20140582

The final version of this article is now available: Vol. 11 (2014), No. 17 pp. 20140582-20140582

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Abstract

A novel compact defected ground structure (DGS) common mode filter is proposed, which adopts only two C-shaped DGS and has only a small size of 7.5mm by 10mm. It adopts two-pole structure to achieve wide stopband and adopts method of smooth transition at the junctions of DGS between the slit and the square to improve the depth of stopband. The filter provides over 15 dB common mode suppression from 3.7GHz to 9.8GHz, while the differential signals still keep good signal integrity. Simulated and measured results are well agreed.

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