Hybrid differential transmission line bend to suppress common-mode noise

Author

Guan, S.W. ; Kuo, C.W. ; Wang, H.Y. ; Hsu, C. ; Wu, S. ; Wang, Cheng C.

Author_Institution

Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan

Volume

49

Issue

17

fYear

2013

fDate

August 15 2013

Firstpage

1068

Lastpage

1069

Abstract

A new type of differential transmission line with a bend is proposed to reduce differential-to-common-mode conversion noise for high-speed digital circuits. The hybrid structure consists of alternating edge-coupled and broadside-coupled transmission line sections which has the effect of reducing the mode conversion noise by at least 20 dB up to 10 GHz, whereas the differential insertion loss remains low. In addition, in the time domain, the common-mode noise is lower than the conventional edge-coupled differential transmission line bend. The performance of the proposed structure with a bend is demonstrated both numerically and experimentally. The measurement results agree very well with the simulation results from the three-dimensional full-wave solver.

Keywords

digital circuits; signal denoising; time-domain analysis; transmission lines; alternating edge-coupled transmission line sections; broadside-coupled transmission line sections; differential insertion loss; differential-to-common-mode conversion noise reduction; high-speed digital circuits; hybrid differential transmission line bend; three-dimensional full-wave solver; time domain;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2013.1340

Filename

6583110