A novel HU-shaped common-mode filter for GHz differential signals

Author

Shu-Jung Wu ; Chuang, Hao-Hsiang ; Wang, Ting-Kuang ; Wu, Shu-Jung

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei

fYear

2008

fDate

18-22 Aug. 2008

Firstpage

1

Lastpage

4

Abstract

A novel low-cost filter design for common-mode noise suppression in high-speed differential signals is proposed. It is realized by etching a HU-shaped defected-ground structure (DGS) to perturb the return current of the common-mode noise. A simple LC resonator model for the proposed structure is also developed with good agreement to the full-wave simulation and measurement result. It is found that over 15 dB of common-mode noise suppression can be achieved over a wide frequency ranges from 3.6 to 9.1 GHz, while the differential signals still keep good signal integrity in eye-pattern observation.

Keywords

filtering theory; interference suppression; microwave filters; passive filters; resonator filters; HU-shaped common-mode filter; LC resonator model; common-mode noise suppression; defected-ground structure; differential signals; frequency 3.6 GHz to 9.1 GHz; full-wave simulation; low-cost filter; Insertion loss; Integrated circuit modeling; Loss measurement; Microwave filters; Noise; Resonant frequency; Resonator filters; EMI; Signal integrity; common-mode filter; defected ground plane; differential signal;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 2008. EMC 2008. IEEE International Symposium on

Conference_Location

Detroit, MI

Print_ISBN

978-1-4244-1699-8

Type

conf

DOI

10.1109/ISEMC.2008.4652072

Filename

4652072