Modeling and Design of A Compact Wideband Common-mode Filter using Internal Coupling Technique

Yindi Yao; Zhibin Zeng; Xin Xiang

doi:10.1587/elex.13.20161063

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

Modeling and Design of A Compact Wideband Common-mode Filter using Internal Coupling Technique

Yindi Yao, Zhibin Zeng, Xin Xiang

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Keywords: Microwave filter, Common-mode filter, Defected ground structure, Difference circuit

JOURNAL FREE ACCESS Advance online publication

Article ID: 13.20161063

DOI https://doi.org/10.1587/elex.13.20161063

The final version of this article is now available: Vol. 14 (2017), No. 2 pp. 20161063-20161063

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Abstract

In order to suppress the common mode (CM) noise in high-speed differential signal traces, a compact CM filter is proposed in the letter, which adopts two C-shaped defected ground structure (DGS) cells and one double-headed arrow-shaped DGS cell. An equivalent circuit model is used to explain the working principle of the CM filter. The filter has a small size of 11mm by 10mm. It provides a CM suppression from 3.5GHz to 12.4GHz over 15 dB, while the differential signals still keep good signal integrity. The experimental results are in good agreement with the simulated results.

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